A surgical mask, also known by other names such as a medical face mask or procedure mask, is a personal protective equipment used by healthcare professionals that serves as a mechanical barrier that interferes with direct airflow in and out of respiratory orifices (i.e. nose and mouth). This helps reduce airborne transmission of pathogens and other aerosolized contaminants between the wearer and nearby people via respiratory droplets ejected when sneezing, coughing, forceful expiration or unintentionally spitting when talking, etc. Surgical masks may be labeled as surgical, isolation, dental or medical procedure masks. The dust blocking efficiency of face mask is based on its blocking efficiency against fine dust, especially respiratory dust below 2.5 microns. Because the dust with this particle size can directly enter the alveoli, it has the greatest impact on human health. The dust blocking principle of gauze mask is mechanical filtration, that is, when the dust collides with the gauze, it passes through layers of barrier to block some large particles of dust in the sand cloth. For some fine dust, especially dust less than 2.5 microns, it will pass through the mesh of gauze and enter the respiratory system. The dust mask is composed of filter material activated carbon fiber felt pad or non-woven fabric. Those respiratory dust less than 2.5 microns are isolated in the process of passing through this filter material to filter air.
The anti side leakage design of mask is to prevent air from being inhaled through the gap between mask and human face without filtering. Air is like water flow. It flows to where the resistance is small. When the shape of the mask is not close to the face, the dangerous objects in the air will leak from the non close place and enter the human respiratory tract. Well, even if you choose a mask with the best filter material. Nor can it protect your health. Many foreign regulations and standards stipulate that workers should regularly test the tightness of masks. The purpose is to ensure that workers choose masks of appropriate size and wear masks according to the correct steps. For the filter material of a good protective mask, the following three conditions should be met: first, the filter efficiency is high when the mask is well sealed with the user's face, second, the respiratory resistance is small, and third, the user feels comfortable. There are a variety of materials such as ordinary woven fabrics and animal dust masks. What is very popular in the national standard is a kind of activated carbon felt material. The structure of gauze mask has poor tightness with human face. Many fine particles that do great harm to us will enter the respiratory tract and lungs through the gap between mask and face. Its filter material is generally some mechanical fabrics. The only way to achieve high dust prevention efficiency is to increase the thickness, and the negative effect of increasing the thickness is to make users feel great respiratory resistance and uncomfortable. The electrostatic treated non-woven fabric can not only block large dust particles, but also the electrostatic charge attached to its surface can adsorb the fine dust through electrostatic attraction, so as to achieve high dust prevention efficiency. The thickness of the filter material is very thin, which greatly reduces the respiratory resistance of users and feels comfortable, so as to meet the three necessary conditions of good filter material mentioned above. With good filter material and scientifically designed mask structure, an efficient and high-quality mask is formed.
Disposable face masks are made of more than three layers of 28g non-woven fabrics; The bridge of the nose is made of environment-friendly all plastic strip, which does not contain any metal. It is equipped with breathable and comfortable. It is especially suitable for electronic factories and daily life. Disposable mask (medical surgical mask) can prevent respiratory tract infection to a certain extent, but can not prevent haze. When purchasing, it should be noted that the mask with the words "medical surgical mask" clearly marked on the outer package should be selected. Disposable three-layer mask is made of two layers of non-woven fabric and filter paper; The disposable three-layer mask is made of two layers of fiber non-woven fabric professionally used for medical and health, with an additional layer in the middle. The filter spray cloth with more than 99% bacteria prevention is welded by ultrasonic. The bridge of the nose adopts environment-friendly all plastic strip, which does not contain any metal. It is equipped with steam permeability and comfortable. The filtering effect of b.f.e is up to 99%, especially suitable for electronic factories; The disposable activated carbon mask is made of 28g non-woven fabric on the surface and 99% bacteria proof filter paper on the first layer in the middle, which plays a role in preventing bacteria and virus harm; The second layer in the middle is made of new high-efficiency adsorption and filtration materials - activated carbon fiber and activated carbon cloth, which has the effects of anti-virus, anti odor, bacterial filtration and dust prevention; The disposable mask is made of environment-friendly full plastic nose bar, and the nose clip design can be adjusted most comfortably according to different face shapes. The inner covering ultrasonic spot welding is selected, and the ear belt can be very firm and not easy to fall.
Protective gloves are used to protect hands from injury. In medical treatment, it is mainly used for medical examination, isolation and protection. There are mainly medical examination gloves, sterile medical gloves, medical X-ray protective gloves, etc. There are many kinds of protective gloves. The medical protective gloves series include inspection gloves, sterile medical gloves, medical X-ray protective gloves, etc. Sterile medical gloves belong to medical polymer materials and products. Ordinary sterile medical rubber gloves are used in the hospital operating room. The disadvantages of these gloves include: different production processes and too little talc powder coating; It is laborious for doctors with large hands; Most preoperative hand washing do not use alcohol to soak, but use disinfectant to smear the arm. After applying the disinfectant, the arm becomes astringent. When wearing gloves, the cuff on the back of the hand is easy to reverse, so that the back of the glove is in contact with the skin, which may cause pollution and fail to meet the sterility requirements.
The types of protective clothes include fire protection clothing, industrial protective clothing, medical protective clothing, military protective clothing and protective clothing for special groups. Protective clothing is mainly used in fire protection, military industry, shipping, petroleum, chemical industry, painting, cleaning and disinfection, laboratory and other industries and departments. According to the protective function, it is divided into health protective clothing, such as radiation proof clothing, cold proof clothing, heat insulation clothing and antibacterial clothing; Safety protective clothing, such as flame retardant clothing, flame retardant protective clothing, arc protective clothing, anti-static clothing, bulletproof clothing, stab proof clothing, aerospace clothing, diving clothing, acid proof clothing and insect proof clothing; Work clothes to keep the wearer healthy, such as oil proof clothes, dust-proof clothes and water repellent clothes. The structure of protective clothing has the characteristics of anti permeability, good air permeability, high strength and high hydrostatic pressure resistance. It is mainly used in industrial, electronic, medical, chemical and bacterial infection prevention environments. In addition to meeting the wear requirements of high strength and wear resistance, it often varies due to different protection purposes and protection principles, from natural materials such as cotton, wool, silk and lead, synthetic materials such as rubber, plastic, resin and synthetic fiber, to contemporary new functional materials and composites, such as impact resistant Para aromatic polyamide and high strength and high modulus polyethylene fiber products, oil repellent fluorine-containing compounds and radiation resistant polyimide fibers, Antistatic agglomerated acrylic fiber, complex copper fiber, antibacterial fiber and related odor resistant finished fabrics.
Syringe is a common medical appliance. As early as the 15th century, the Italian cartiner put forward the principle of syringe. It mainly uses a needle to extract or inject gas or liquid. It can also be used to inject medical equipment, containers, such as scientific instruments in some chromatography through rubber diaphragms.

The fruit processing line refers to the cleaning, lifting, sorting, crushing, peeling and pitting, beating and other pre-processing of the original fruit, to vacuum concentration, ultra-high temperature sterilization, aseptic filling to aseptic large bags of concentrated sauce or concentrated juice and other production lines of all or part of the equipment.The food sterilizing machine is a machine that takes food raw materials and processed products as the object. Through the sterilization and sterilization of microorganisms, the main factors that cause food deterioration, to stabilize food quality, effectively prolong the shelf life of food, and reduce the The number of harmful bacteria in food is surviving, and the ingestion of live bacteria can cause human (usually intestinal) infection or pre-produced bacterial toxins in food to cause human poisoning. The material is heated to 138-150°C through a casing heat exchanger in a continuous flow state, and is maintained at this temperature for a certain time (2-4 seconds) to achieve commercial sterility levels, and then in a sterile state. Filled in sterile packaging containers in a sterile environment. The entire sterilization process is completed in an instant at high temperature, which completely kills microorganisms and spores that can cause material spoilage and deterioration, and at the same time, greatly preserves the original flavor and nutrients of the food. This strict processing technology and precise processing method of equipment can effectively prevent the secondary pollution of food and greatly prolong the shelf life of the product. The UHT process preferably adopts the in-line casing heat exchanger sterilization system, because of its reliable working performance under high steam pressure and ultra-high temperature, especially the continuous working time can be as long as more than ten hours, thus achieving better performance than plate type heat exchangers.
A juice extracting machine, also known as a juice extractor, is a tool used to extract juice from fruits, herbs, leafy greens and other types of vegetables in a process called juicing. It crushes, grinds, and/or squeezes the juice out of the pulp. Some types of juicers can also function as a food processor. Most of the twin gear and horizontal masticating juicers have attachments for crushing herbs and spices, extruding pasta, noodles or bread sticks, making baby food and nut butter, grinding coffee, making nut milk, etc. Juice extracting machines are used for squeezing juice from citrus such as grapefruits, lemons, limes, and oranges. Juice is extracted by pressing or grinding a halved citrus along a juicer's ridged conical center and discarding the rind. Some reamers are stationary and require a user to press and turn the fruit, while others are electrical, automatically turning the ridged center when fruit is pressed upon.
An evaporating machine is a device used in a process to turn the liquid form of a chemical substance, such as water, into its gaseous form - vapor. In this process, the liquid is evaporated, or vaporized. The solution containing the desired product is fed into the evaporator and passes across a heat source. The applied heat converts the water in the solution into vapor. The vapor is removed from the rest of the solution and is condensed while the now-concentrated solution is either fed into a second evaporator or is removed. The evaporator, as a machine, generally consists of four sections. The heating section contains the heating medium, which can vary. Steam is fed into this section. The most common medium consists of parallel tubes but others have plates or coils typically made from copper or aluminium. The concentrating and separating section removes the vapor being produced from the solution. The condenser condenses the separated vapor, then the vacuum or pump provides pressure to increase circulation.
One example of an evaporator is a radiator coil used in a closed, compressor-driven circulation of a liquid coolant. This is called an air-conditioning system (A/C) or refrigeration system. It allows a compressed cooling chemical, such as R-22 (Freon) or R-410A, to evaporate/vaporize from liquid to gas within the system while absorbing heat from the enclosed cooled area in the process, for example a refrigerator or air conditioner. This works in the closed A/C or refrigeration system with a condenser radiator coil that exchanges the heat from the coolant, such as into the ambient environment. A different kind of evaporator can be used for heating and possibly boiling a product containing a liquid to cause the liquid to evaporate from the product. The appropriate process can be used to remove water or other liquids from liquid based mixtures. The process of evaporation is widely used to concentrate liquid foods, such as soup or make concentrated milk called "condensed milk" done by evaporating water from the milk. In the concentration process, the goal of evaporation is to vaporize most of the water from a solution which contains the desired product.
The traditional filling machinery mostly adopts mechanical control, such as cam distribution shaft, and then there are photoelectric control, pneumatic control and other control forms. However, with the increasing improvement of food processing technology and the increasing requirements for packaging parameters, the original control system has been difficult to meet the needs of development. New technology should be adopted to change the appearance of food packaging machinery. Today's food filling machine is a mechanical and electronic equipment integrating machine, electricity, gas, light and magnetism. In the design, we should focus on improving the automation of packaging machinery, combine the research and development of packaging machinery with computers, and realize mechatronics Control. The essence of Mechatronics is to organically combine machinery, electronics, information, detection and other related technologies from a system point of view and using the principle of process control to realize the overall optimization.
Generally speaking, it introduces microcomputer technology into packaging machinery, applies mechatronics technology, develops intelligent packaging technology, and combines it into a full-automatic packaging system for production according to the requirements of product automatic packaging process. The detection and control of production process and fault diagnosis and troubleshooting will realize comprehensive automation and realize high-speed, high-quality, low consumption and safe production. It can be used for accurate measurement, high-speed filling and automatic control of packaging process of aquatic processed food, which will greatly simplify the packaging mechanical structure and improve the quality of packaging products. For example, the most common plastic bag sealing machine, its sealing quality is related to packaging materials, heat sealing temperature and running speed. If the material (material and thickness) changes, the temperature and speed will also change, but the change is difficult to grasp. If microcomputer control is adopted, the best parameters of sealing temperature and speed of various packaging materials are matched and input into microcomputer memory, and then equipped with necessary sensors to form an automatic tracking system. In this way, no matter which process parameter changes, the best sealing quality can be guaranteed.
The food drying machine is suitable for industrial and mining enterprises, medical colleges and scientific research institutions to dry and heat items under vacuum. Its temperature controller adopts touch keys, digital LED display, PID intelligent control instrument, and PT100 platinum resistance temperature measurement sensor. Storage, heating, testing and drying are carried out in an environment without oxygen or full of inert gas, so food will not oxidize. The fruit washing machine is a machine for washing fruit. The machine has the functions of food purification, disinfection and sterilization and air purification. It can achieve 1. Food purification, disinfection and sterilization: degrade toxic substances such as pesticide residues in vegetables and fruits from the outside to the inside, and remove harmful substances such as antibiotics, chemical additives, hormones and heavy metal ions in meat and seafood; 2. Air purification: it can remove formaldehyde, paint smell and other harmful substances emitted from new decoration and new furniture; 3. Preservation of fruits and vegetables: washed fruits, vegetables, meat and other foods can extend the preservation period for 7 days and remove the peculiar smell in the refrigerator.

Powder coating is a type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light. The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals, such as household appliances, aluminium extrusions, drum hardware, automobiles, and bicycle frames. Advancements in powder coating technology like UV curable powder coatings allow for other materials such as plastics, composites, carbon fiber, and MDF (medium-density fibreboard) to be powder coated due to the minimum heat and oven dwell time required to process these components. Powder coatings contain no solvents and release little or no amount of volatile organic compounds (VOC) into the atmosphere. Thus, there is no need for finishers to buy costly pollution control equipment. Companies can comply more easily and economically with environmental regulations, such as those issued by the U.S. Environmental Protection Agency. Powder coatings can produce much thicker coatings than conventional liquid coatings without running or sagging. Powder coated items generally have fewer appearance differences than liquid coated items between horizontally coated surfaces and vertically coated surfaces. A wide range of speciality effects are easily accomplished using powder coatings that would be impossible to achieve with other coating processes. Curing time is significantly faster with powder coatings compared to liquid coatings especially when using ultraviolet cured powder Coatings or advanced low bake thermosetting powders.
The automatic powder coating machine has several spraying methods, such as 1. Electrostatic spraying method: it is the most commonly used spraying method for powder automatic spraying equipment, mainly through the electrostatic field to make the electrostatic powder coating evenly fall on the surface of the workpiece to be sprayed, A uniform coating is then formed by leveling in a curing oven; 2. Electrostatic fluidized bed spraying method: The electrostatic fluidized bed spraying method is mainly by adding high-voltage electrodes to the interval of the porous plate at the bottom of the powder automatic spraying equipment and the container. Thus, a high-voltage electric field is formed between the piezo electrode and the workpiece, and the uniformity and adhesion of the coating thickness of the powder coating are greatly improved; 3. Electrostatic oscillating powder coating method: The electrostatic oscillating powder coating method used in powder coatng machine mainly converts the high-voltage point of direct current into a high-voltage electrostatic field, so that its periodic change produces electric field oscillation. And under the action of this oscillating electrostatic field, the powder coating will float.
Electrostatic powder coating gun is mainly composed of powder supply barrel, powder spray gun and controller. It is a special spray gun for electrostatic spraying of paints and powder coatings. It is both a paint atomizer and an electrostatic electrode generator. The powder needs to be charged to the workpiece to form an effective coating to protect and decorate the workpiece. Usually, a powder spray gun that can generate high-voltage static electricity is used as a production tool for powder coating. Such a type of spray gun will generate a high-voltage, low-current high-voltage electric field, and the powder particles will be negatively charged when they move in it, and then firmly adsorbed onto the workpiece to be coated. Such a process is often referred to as powder electrostatic spraying.
In electrostatic powder coating, the curing furnace is the key equipment. The quality of the paint film has a very important relationship with the temperature of the curing furnace. The heating method of the powder curing furnace can be divided into two categories: one is the hot air circulation type, The second type is the infrared radiation heating method. Hot air circulation heating can be divided into direct heating and indirect heating. There are two heat sources used for direct heating, electric heating spiral fin type and gas type direct heating. The advantages of the direct electric heating spiral fin type are uniform temperature in the furnace and strong adaptability of the workpiece: the solid state relay PID is used to adjust the temperature. The temperature deviation in the powder coating oven is small. The disadvantage is that the heating time is slow and the equipment power is large, and it is not fit for used as an industrial powder coating oven. Because it is heated by hot air circulation, the curing process is easy to cause secondary pollution of dust. The furnace occupies a large area. The advantages of the gas-fired direct heating method are fast heating speed, high heat energy conversion rate, proportional adjustment control for furnace temperature control, and small temperature control deviation in the warm furnace. Because the burner flame burns directly in the combustion chamber, the curing process is likely to cause secondary pollution of dust and exhaust gas, which is not suitable for use as a home powder coating oven. A high temperature resistant filter should be installed in the heating chamber, so that the full pressure of the circulating fan should be considered in the selection of the fan. In addition, the heating indoor plate must be made of stainless steel plate, the cost of these two equipment is relatively Increase, the furnace covers a large area.
Powder coating filter is a kind of multi-purpose filter equipment with novel structure, small size, simple and flexible operation, energy saving, high efficiency, airtight work and strong adaptability. It is a pressure filter device. The liquid flows into the filter bag from the inlet pipe on the side of the filter shell. The filter bag itself is installed in the reinforcement net. The liquid penetrates the filter bag of the required fineness grade to obtain qualified filtrate. Impurity particles are captured by filter bags. The machine is very convenient to replace the filter bag, and there is basically no material consumption for filtration. This filter can be applied to 1. Nanofiltration (NF), ultrafiltration (UF), reverse osmosis (RO), electronic membrane deionization (giant D,) and other system security filtration; 2. Filtration of pharmaceutical injections, large infusions, eye drops, Chinese herbal medicines, etc., extraction, purification and concentration of biological preparations; 3. Pre-filtration of high-purity water for electronics, microelectronics, and semiconductor industries; 4. Filtration of oilfield re-injection water, boiler feed water, chemical reagents, liquid organic products, high-purity chemicals, concentrated drugs, etc.; 5. Drinking purified water, mineral water, fruit juice, tea drinks, health drink filtration, etc.
The main recovery methods of powder coating include filter element recovery and combination of large cyclone and small cyclone. Improvements to the powder coating recovery powder sieve system allow for a more efficient, cleaner coating. 1. Filter element detection and cleaning device powder recovery; 2. The frequency conversion recovery system maintains a stable air flow for powder recovery, which means a stable recovery effect. However, under the same recycling capacity, different workpieces have different powder adhesion efficiencies. Coupled with the guiding effect of some large workpieces and long workpieces, powder spillage will also occur. The selection of variable frequency fans can adjust the recovery air volume within a certain range, which not only meets the requirements of noise reduction, but also meets the requirements of recovery capacity. The frequency conversion recovery system can increase or decrease the air volume according to the recovery effect, so that the powder coating production has a certain mobility. When the production volume is small or the amount of powder spraying is small, the air volume of the fan can be reduced, which has a certain energy saving effect.

A puzzle is a game, problem, or toy that tests a person's ingenuity or knowledge. In a puzzle, the solver is expected to put pieces together in a logical way, in order to arrive at the correct or fun solution of the puzzle. There are different genres of puzzles, such as crossword puzzles, word-search puzzles, number puzzles, relational puzzles, and logic puzzles. The academic study of puzzles is called enigmatology. Puzzles are often created to be a form of entertainment but they can also arise from serious mathematical or logical problems. In such cases, their solution may be a significant contribution to mathematical research.
There are several categories of puzzles, such as one-sided puzzles: the pictures of the puzzles are mostly based on natural scenery, buildings and some familiar patterns. Castles and mountains are two traditional themes, but any drawings and images can be used as a puzzle material. There are some companies that also offer services for making puzzles of private photography; Double-sided puzzles: There are other types of puzzles that have patterns printed on both sides of the pieces. Players can make groups according to the patterns on any side. At the same time, the difficulty of the game is also increased, because as far as the pieces in the hand are concerned, it is difficult for players to determine which side is the correct side; 3D puzzles: In addition to the traditional flat puzzles, there are different kinds of 3D puzzles. The pieces of the three-dimensional puzzle are mostly made of more solid materials such as wood or foam. Its spatial characteristics often lead to an increase in difficulty, requiring players to splicing pieces in a specific order: if the completed parts are improperly assembled, the remaining pieces may not be able to continue to be spliced. Another type of toy known as a "puzzle box" is also common: players can assemble small drawers or boxes with items in the middle from interlocking parts that resemble pieces of a flat-panel puzzle. Mechanical puzzles or dexterity puzzles such as the Rubik's Cube and Soma cube can be stimulating toys for children or recreational activities for adults.
Solutions of puzzles often require the recognition of patterns and the adherence to a particular kind of ordering. People with a high level of inductive reasoning aptitude may be better at solving such puzzles than others. But puzzles based upon inquiry and discovery may be solved more easily by those with good deduction skills. Deductive reasoning improves with practice. Mathematical puzzles often involve BODMAS. BODMAS is an acronym and it stands for Bracket, Of, Division, Multiplication, Addition and Subtraction. In certain regions, PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition and Subtraction) is the synonym of BODMAS. It explains the order of operations to solve an expression. Some mathematical puzzles require Top to Bottom convention to avoid the ambiguity in the order of operations. It is an elegantly simple idea that relies, as sudoku does, on the requirement that numbers appear only once starting from top to bottom as coming along.
Kids puzzles have many benefits for children: Children must use their brains while playing puzzles, so when children play puzzles, they will exercise their hands-on ability, reading and writing ability and problem-solving ability at the same time. Children must first understand the method of jigsaw puzzles. From the description, they can exercise their ability to read and write. In the process of playing with their parents or other small partners, they will also exercise their listening and speaking skills. When multiple children work together to solve puzzles, the children's collective division of labor and cooperation ability can be exercised. Communication skills can be exercised from an early age. When children do puzzles together, they can naturally exercise their ability to communicate with others, divide and cooperate with others in the process of jigsaw puzzles. Children playing puzzles can also exercise children's observation ability and improve children's learning ability. In the process of jigsaw puzzles, in order to successfully complete the graphics, it is necessary to carefully observe each piece of the puzzle. In this process, it can play a good role in children's understanding of colors and graphics, etc. exercise effect. Adult puzzles exercise adults' image thinking and logical thinking; can improve observation and analysis ability, can exercise mentality, cultivate adults' patience and concentration; exercise adults the ability of hand-eye coordination, cultivate the spirit of concentration.
Most modern puzzles are made of cardboard, so the cost is lower and the production process is simpler. The pattern of the puzzle is an entire fine art print that is pasted on the surface of the cardboard before cutting. The content of the picture can be an enlarged photograph, painting, or other types of graphic art. The cardboard after sticking will be sent to a special imprinting machine, which is equipped with a steel cutter group combined according to a predetermined pattern. After the cardboard is punched by the machine tool, the cutter group will cut it into pieces. The process is quite similar to the forming process of graphic cookies, except that the impact force of the puzzle stamper is much higher. A typical 1000-piece puzzle, for example, requires the machine tool to generate up to 700 tons of pressure during operation in order for the cutter set on the die to completely cut through the cardboard. The die (printing plate) of the puzzle is usually made of a board such as plywood. The mold maker first draws or burns grooves on the template according to the grouping pattern of the puzzle pieces, and then inserts the blades one by one into the grooves to assemble into knives. Group. The surface of the cutter set is also covered with a layer of elastic material, usually foam rubber, which is used to eject the cardboard pieces from the pores of the cutter set after printing.

Fruit and vegetable washer is a machine for washing vegetables and fruits. The machine has the functions of food purification, disinfection and sterilization, and air purification. 1. Food purification, disinfection and sterilization: degrade toxic substances such as pesticide residues in vegetables and fruits from the outside to the inside, and remove harmful substances such as antibiotics, chemical additives, hormones, and heavy metal ions in meat and seafood; 2. Purify the air: It can remove harmful substances such as formaldehyde and paint smell emitted from new decoration and new furniture; 3. Preservation of fruits and vegetables: The fresh-keeping period of washed fruits, vegetables, meat and other foods can be extended for 7 days, and the peculiar smell in the refrigerator can be removed at the same time.
A fruit sorting machine is a machine that differentiates fruit grades according to their appearance and/or internal characteristics. It is composed of fruit feeding hopper, conveyor, detection and sorting device, grading outlet, etc. According to the detection and sorting device, the sorting methods are divided into weight, size, color, hardness, spectral characteristics, and image scanning. Commonly used sorting methods by size, the sorting devices include screen drum type, round hole tape type and roller type. When passing through, the fruit falls into different areas due to different sizes to achieve the purpose of grading.
Most of the small fruit peeling machines on the market are hand-operated peelers, which use manpower to turn the rocker to peel the fruit. This fruit peeler not only consumes manpower, but also has uneven peeling thickness due to different rotational speeds, and cannot adjust the distance between the blade and the fruit according to the size of the fruit. Therefore, in order to solve these existing problems, a new type of automatic fruit peeling machine was designed to realize the automation of fruit peeling, thereby making fruit peeling more convenient and fast. When the machine is working, it is powered by a motor to drive the gear shaft to rotate, thereby driving the fruit inserted on the tray to rotate. The fruit bracket can be adjusted up and down according to the actual size of the fruit, and the thimble on the bracket is inserted into the fruit to make the fruit more fixed. Reliable, the gear shaft meshes with the gear, and the gear drives the screw rod to rotate downward, thereby driving the knife holder connected to the screw rod to move downward, the blade rubs against the surface of the fruit, and the peel can be easily peeled off. The peel of the fruit is separated from the pulp from top to bottom, and the automation of fruit peeling is realized. When the work is completed, the power can be turned off and the fruit can be removed from the bottom needle.
The vegetable cutting machine adopts the structure of a half-moon knife disc and a half-moon adjustment disc. It does not need to replace the blade. It only needs to use different hoppers and switch the plate to move and reverse the shredding or slicing work. It is an ideal kitchen equipment for slicing or shredding fruits and vegetables such as radishes, potatoes, orchid heads, sweet potatoes, etc. The main components of the vegetable cutting machine are the frame, the conveyor belt, the vegetable pressing belt, the slicing mechanism, the speed control box or the tower wheel speed control mechanism. It is used for slicing hard vegetables such as melons and potatoes. The thickness of the slices can be adjusted freely within a certain range. The vertical knife part can process leafy soft vegetables or cut slices into various shapes such as cubes and diamonds of different specifications. The length of vegetable cutting can be adjusted arbitrarily within a certain range through the "adjustable eccentric wheel". Because the vertical knife simulates the principle of manual vegetable cutting, the processing surface is smooth and regular, and the cut vegetables are well organized and kept fresh.
Drying machines can be divided into two types: industrial and civilian. Industrial dryers are also called drying equipment or dryers. Civilian dryers are a type of washing machine. They are generally used to remove clothing and other textiles after washing with water. of moisture. The dryer has several modes such as belt drying, tumble drying, box drying, tower drying, etc. The heat source includes coal, electricity, gas, etc.; the material has hot air flow type and radiation type in the drying process. , Hot air tumble drying is that the hot air moves forward from the tail, fully contacts the material, and makes full use of the heat transfer through heat conduction, convection and radiation; the heat energy is directly transferred to the material, so that the moisture of the material is continuously evaporated in the cylinder, and the material is fed. The air induction device at the mouth draws out a large amount of moisture and wet air to prevent secondary pollution caused by dust discharge; through the internal spiral stirring, sweeping, and plate copying, the movement of materials is promoted to complete the entire drying process; countercurrent conduction dehumidification, Avoid reducing repeated drying cycles.
A sheller machine is a machine that crushes and peels the shells of oilseeds and nuts. It is composed of feeding, shell breaking, shell kernel separation, discharging, adjusting and other mechanisms. According to the working principle of the shell breaking mechanism, it is divided into disc type, knife plate type, knife cage type, centrifugal type, roll type, etc. The material is crushed by grinding, shearing, extrusion or impact, and the shell is removed by the shell and kernel separation mechanism composed of a fan and a sieve to obtain pure nuts.
The meat and bone grinder is a granular meat stuffing that meat processing enterprises process raw meat according to different technological requirements in the production process. and other meat products. It is made of high quality (iron casting) or stainless steel, which is non-polluting to the processed materials and meets the food hygiene standards. The tools are specially heat-treated, with superior wear resistance and long service life. The machine is simple to operate, easy to disassemble and assemble, easy to clean, and has a wide range of processed products. The tool can be adjusted or replaced at will according to the actual use requirements.
The packaging machine is a type of machine that packs the product, which plays the role of protection and beauty. The packaging machine is mainly divided into 2 aspects: 1. The overall production and packaging of the assembly line; 2. The peripheral packaging equipment of the product. There are many types of packaging machines and many classification methods. There are many kinds from different viewpoints, which are divided into: liquid packaging machine, powder packaging machine, granule packaging machine, body packaging machine, sauce packaging machine, electronic combination scale packaging machine, pillow packaging machine according to the type of machinery; According to the packaging function, there are inner packaging and outsourcing packaging machines; according to the packaging industry, there are packaging machines for food, daily chemicals, textiles, etc.; according to the packaging station, there are single-station and multi-station packaging machines; according to the degree of automation , There are semi-automatic and fully automatic packaging machines. Vacuum packaging machines are divided into horizontal vacuum packaging machines and vertical vacuum packaging machines according to the placement of the packaging. The packaged object of the horizontal vacuum packaging machine is placed horizontally; the packaged object of the vertical vacuum packaging machine is placed vertically. Horizontal vacuum packaging machines are more common in the market.
The grading machine is widely used in beneficiation plants to form a closed-circuit cycle with ball mills to separate ore sand, or in gravity beneficiation plants to classify ore sand and fine mud, and to classify ore pulp in metal beneficiation processes, and ore washing operations. Desliming, dehydration and other operations. The machine has the characteristics of simple structure, reliable operation and convenient operation.

A pail is typically a watertight, vertical cylinder or truncated cone or square, with an open top and a flat bottom, attached to a semicircular carrying handle called the bail. A pail is usually an open-top container. In contrast, a pail can have a top or lid and is a shipping container. In common usage, the two terms are often used interchangeably. Plastic packaging barrels are mostly used for the storage and transportation of various liquids, and have good characteristics for special dangerous goods. It is used for the packaging of dangerous goods that need heat preservation, moisture resistance, pressure resistance and corrosion resistance. And it is mostly used to hold liquid and solid items in chemical raw materials, pesticides, lubricants, coatings, medicine, food, hardware electronics, electromechanical and other industries. Specifications from 100mL-200L.
The main raw material for the production of plastic barrels is polyethylene (PE), which is a high molecular organic compound formed by addition polymerization of ethylene. Polyethylene is recognized as the best food contact material in the world, non-toxic, tasteless and odorless, and meets the hygiene standards for food packaging. Polyethylene film, light and transparent, has the properties of moisture resistance, oxygen resistance, acid resistance, alkali resistance, general air tightness, and excellent heat sealability. Material. Secondary water supply in high-rise buildings, water storage, water treatment, medicine and food, electronic chemical industry, aquaculture, textile printing and dyeing, petrochemical reagents, pickling and electroplating, brewing sugar, vegetable pickling, refrigeration, environmental protection and hygiene and other industries widely used in.
Metal pails are larger capacity containers made of sheet metal. Its specifications include small open head pails, middle open head barrels, carrying barrels, special-shaped top barrels, full-opening conical steel barrels, full-opening barrels, straight-opening barrels, opening necked steel barrels, and so on. It has a very wide range of applications, involving many industries such as food, beverage, chemical, aerosol and other content packaging. In order to meet the needs of these packagings, metal drums have various properties suitable for them, among which the sealing properties are common and very important. Compared with other packaging materials, metal materials are denser, stronger, easier to form and process, and metal drums have better sealing performance, which can be suitable for long-term storage of food and items that meet high requirements such as leak-proof, anti-corrosion, and pressure resistance. , because the application field of metal barrels is very wide and has an irreplaceable status.
The closed-mouth square pail is mostly made of polyethylene, polypropylene, polyester and other plastics by blow molding, injection molding, blister molding, and rotational molding. It is mostly used to hold liquids and solids in chemical, pesticide, medicine, food, hardware electronics, electromechanical and other industries. The pail contains the following features: light weight, high temperature resistance, not easy to corrode, clean and clean, reduce pollution, can be tilted 20 degrees, easy to transport and stack, save space. The PE plastic square pail is easy to use, economical and durable, and can contain Class II and III dangerous goods. It has been widely used in the storage and transportation of various chemicals such as coatings and pesticides. PE plastic square barrel products have the following characteristics: 1. The use of IBC ton barrel packaging can greatly reduce the cost of production, storage, transportation and operation, and save a lot of manpower and material resources; 2. The product structure is reasonable, firm and strong, can be directly loaded and unloaded by forklift, and can be stacked and stored; 3. The bottom of the product is equipped with a drain valve, which is convenient, rapid, thorough and safe for liquid discharge, easy to clean, and can be used for multiple turnovers, saving energy and environmental protection; 4. It has beautiful appearance, non-toxic, tasteless, HDPE material, food grade, acid resistance, alkali resistance, impact resistance, high temperature resistance, cold resistance. It can be used in the chemical industry and is easy to install and transport.
A steel can, tin can, steel packaging, or can is a container for the distribution or storage of goods, made of thin metal. Many cans require opening by cutting the "end" open; others have removable covers. They can store a broad variety of contents: food, beverages, oil, chemicals, etc. Steel cans are made of tinplate (tin-coated steel) or of tin-free steel. In some dialects, even aluminium cans are called "tin cans". Most cans are right circular cylinders with identical and parallel round tops and bottoms with vertical sides. However, cans for small volumes or particularly-shaped contents, the top and bottom may be rounded-corner rectangles or ovals. Other contents may suit a can that is somewhat conical in shape. Fabrication of most cans results in at least one rim—a narrow ring slightly larger than the outside diameter of the rest of the can. The flat surfaces of rimmed cans are recessed from the edge of any rim (toward the middle of the can) by about the width of the rim; the inside diameter of a rim, adjacent to this recessed surface, is slightly smaller than the inside diameter of the rest of the can.
The round can includes three bucket accessories, a base, a round can body and a cover which are arranged in sequence from bottom to top. The round can body has two connected hollow chambers and the hollow chamber can accommodate food. The base and the cover are arranged on the two sections of the round can body. The main body of the round can and the base are set to be detachably connected, the body of the round can and the cover are also set to be detachably linked, the surface of the cover is provided with a gripping part, and the gripping part is integrally connected with the cover.
A can is a sealable container made of metal sheet, glass, plastic, cardboard or a combination of some of the above materials, which stores commercial food, and is commercially sterile after specific treatment. .
It can be canned beverages, including canned soda, coffee, juice, frozen milk tea, beer, etc. It can also be canned food, including lunch meat. The can opener follows the can opener, or imitation cans technology. There are cans in various shapes: two common ones are the "soup tin" and the "tuna tin". Walls are often stiffened with rib bulges, especially on larger cans, to help the can resist dents that can cause seams to split. Can sizes in the United States have an assortment of designations and sizes. For example, size 7/8 contains one serving of half a cup with an estimated weight of 4 ounces; size 1 "picnic" has two or three servings totalling one and a quarter cups with an estimated weight of 101⁄2 ounces; size 303 has four servings totalling 2 cups weighing 151⁄2 ounces; and size 10 cans, most widely used by food services selling to cafeterias and restaurants, have twenty-five servings totalling 13 cups with an estimated weight of 1031⁄2 ounces (size of a roughly 3 pound coffee can). These are U.S. customary cups (not British Imperial standard). In the United States, cook books sometimes reference cans by size. The Can Manufacturers Institute defines these sizes, expressing them in three-digit numbers, as measured in whole and sixteenths of an inch for the container's nominal outside dimensions: a 307 × 512 would thus measure 3 and 7/16" in diameter by 5 and 3/4" (12/16") in height. Older can numbers are often expressed as single digits, their contents being calculated for room-temperature water as approximately eleven ounces (#1 "picnic" can), twenty ounces (#2), thirty-two ounces (#3) fifty-eight ounces (#5) and one-hundred-ten ounces (#10 "coffee" can).

Metal injection molding (MIM) is a molding method in which a plasticized mixture of metal powder and its binder is injected into a mold. It is firstly mixing the selected powder with a binder, then granulating the mixture and then injection molding the desired shape. The polymer imparts its viscous flow characteristics to the mix, which aids uniformity in forming, cavity filling and powder filling. After forming, the binder is removed, and the degreased blank is sintered. Some sintered products may also be subjected to further densification, heat treatment or machining. Sintered products not only have the same complex shape and high precision as those obtained by plastic injection molding, but also have physical, chemical and mechanical properties close to forgings. This process technology is suitable for mass production of small, precise, complex three-dimensional shapes and metal parts with special performance requirements.
MIM technology combines the advantages of powder metallurgy and plastic injection molding, breaking through the limitations of traditional metal powder molding technology on product shape, and using plastic injection molding technology to form parts with complex shapes in large quantities and efficiently It has become a near-net-shape technology for modern manufacturing of high-quality precision parts, and has incomparable advantages over conventional powder metallurgy, machining and precision casting. It produces small metal parts with complex shapes like plastic products, usually weighing 0.1-200g; A variety of complex shapes can be formed like plastic products, such as external grooves, external threads, tapered external surfaces, cross-through holes, blind holes, concave tables, key pins, rib plates, surface knurling, etc.; It has good surface finish and high dimensional accuracy, and the usual tolerance is ±0.3%~0.5%; The material is suitable for a wide range, the product has a high density (up to 95% to 99%), and has a uniform structure and excellent performance; With stable product quality and high production efficiency, it can realize automatic, large-scale and large-scale production.
MIM technology is a very important molding technology in the medical device industry. Small medical devices, precision parts, high-precision parts, and high-performance parts are basically produced using MIM technology. It is also very cost-effective for the production of complex precision parts. Common MIM medical instruments include ear parts, hemostatic forceps, laparoscopes, scalpel handles, dental parts, forceps, scissors, orthopedic joint parts, etc. The current trend in the medical industry is minimally invasive surgery and minimally invasive plastic surgery. Many medical device parts that need to be used are produced by MIM technology. Minimally invasive MIM surgical parts have various geometric shapes and complex structures, which require very high dimensions and accuracy. At present, stainless steel, titanium and nickel-titanium alloys are widely used, and MIM technology is used for dental implants.
The automotive industry has become a major application area for MIM parts, such as numerous MIM auto parts with complex shapes used in engines, gearboxes, turbochargers, locking mechanisms, steering systems and electronic systems. Such as 1) The rocker arm of the BMW engine. One is a rocker arm that rotates with the rollers. This is a rocker arm made of low alloy steel that controls the variable valve timing travel of the engine. It is characterized by its hollow structure and light weight, which is difficult to make by other methods; (2) Shift lever. This is a very high volume MIM custom parts for manual transmissions in passenger cars. The production process of this part is: injection molding, sintering, hardening and assembling the shaft. The material used is Fe2Ni, and the parts should be carburized and quenched after sintering; (3) Turbocharger blades. The production of such MIM variable area nozzle vanes used in automotive diesel turbochargers is high. This part can meet strict dimensional tolerance requirements, and the blade profile can reach an accuracy of ±0.015mm by machining. The blades are produced with special moulds, which have excellent sliding function when opened and reduce deformation when they come out. MIM production can reduce production costs by 20%.
The MIM process has also been widely used in many fields such as smartphones, automobiles, electronic products, mechanical equipment, and consumer goods. Driven by factors such as the rapid growth of electronic products and the substitution of MIM-manufactured parts for traditional process-manufactured parts, the MIM market will still maintain a positive development. A number of key technologies for smart devices represented by smart operating systems, smart human-computer interaction, mobile phone screen display, application processor technology, and battery, charging and other technologies have achieved rapid development, and consumer electronic products such as smart phones and wearable devices are also emerging. into the market. As a typical product with the highest penetration rate, the most diverse forms and the largest demand among the mobile smart terminals, the smartphone plays a rising role as a carrier. The widespread coverage of smart phones continues to influence people's work and lifestyle, and the use of various mobile phone applications and services through the Internet has led to continued deepening of people's reliance on mobile phones. The development trend of thin and light consumer electronic products such as smartphones and wearable devices is accelerating, and the core components of such products are also becoming more sophisticated and complex. In this context, the application prospects of the MIM process are becoming increasingly clear. At present, the process has been widely used in the manufacture of MIM communication parts such as card trays, camera rings, buttons, connector joints, built-in structural parts, watch cases, and buckles.
Orthodontics include a wide range, usually refers to the treatment process of correcting misaligned teeth, abnormal tooth morphology, and abnormal tooth color through oral technical means. There are various methods of orthodontic treatment, such as resin veneer, porcelain veneer, porcelain teeth, orthodontics, etc., according to the actual situation of the individual's teeth, the type of dental deformity, etc., and then choose the treatment method based on individual requirements. Each has its own advantages and disadvantages, and different people have their own preferences. It is necessary to communicate directly with the doctor during the examination to determine the plan. Mainly divided into functional correction and aesthetic correction. Depending on the type of disease, the clinical manifestations are also different, and the common feature is that it has a negative impact on the appearance. Misaligned teeth are manifested in the in and out of the teeth, the overlapping of the teeth, etc., making the teeth difficult to clean and susceptible to dental disease. Abnormal tooth morphology is manifested in incomplete tooth defect, disproportion with adjacent teeth, affecting chewing and image. The most common types of tooth discoloration are fluorosis and tetracycline. The treatment principle of orthodontic treatment is to meet the aesthetic needs while maintaining the complete structure of the tooth tissue to the greatest extent, protecting the health of the gums; enhancing the health, function and aesthetics of the oral cavity, improving the patient's acceptance of oral treatment, and enhancing their confidence. The main methods include resin veneer, porcelain veneer, porcelain teeth, orthodontics, etc., or the use of dental orthodontic brackets. It is necessary to fully consider the patient's age, requirements, degree of injury, treatment time, and expected effects. choose.