Tea and coffee packing machine structure material

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Automatic tea and coffee packing machine structure material

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Automatic tea and coffee packing machine structure material:

Automatic tea and coffee packing machine structure:
AutomaMain body:	SUS 304 stainless steel
Filling system	SUS 304 stainless steel or customized SUS 316 stainless steel

Therefore, when selecting materials for automatic packing machine for tea and coffee, especially materials in contact with coffee product, in addition to considering the mechanical properties such as strength, rigidity, vibration resistance, etc. required by general mechanical design, the following principles should also be noted:

1. It should not contain elements that are harmful to human health or elements that can produce chemical reactions in coffee.
2. It should have high corrosion resistance.
3. It should be easy to clean and can maintain color for a long time.
4. It should be able to maintain good mechanical properties in high and low temperatures.

According to the above principles, the tea and coffee packing machine structure material is as follows:

1. Stainless steel has the advantages of corrosion resistance, stainless, no color change, no deterioration and easy removal of attached instant coffee, as well as good high and low temperature mechanical properties, so it is widely used in coffee and tea packing machinery. Stainless steel is mainly used in pumps, valves, pipes, tanks, pots, heat exchangers, concentrators, vacuum containers and other aspects of coffee processing machinery. In addition, in addition to coffee and tea processing machinery, coffee cleaning machinery and coffee and tea transportation, preservation, storage tanks and utensils that will affect food hygiene due to rust also use stainless steel.

2. Steel materials have unique advantages in wear resistance, fatigue resistance, impact resistance, etc., so they are still widely used in food machinery, especially flour making machinery, noodle making machinery, puffing machinery, etc. in my country. Among the steel materials used, carbon steel is used the most, mainly 45 and A3 steel. These steels are mainly used for structural parts of food machinery. The most used cast iron material is gray cast iron, which is used in machine bases, rollers and other places that require vibration resistance and wear resistance. Ductile cast iron and white cast iron are used in places with high requirements for comprehensive mechanical properties and high requirements for wear resistance, respectively.

3. In the structure of food machinery, in addition to using good metal materials, non-metallic materials are also widely used. The non-metallic materials used in food machinery and equipment are mainly plastics. Commonly used plastics include polyethylene, polypropylene, polystyrene, polytetrafluoroethylene plastics, phenolic plastics containing powder and fiber fillers, laminated plastics, epoxy resins, polyamides, various specifications of foam plastics, polycarbonate plastics, etc., in addition to various natural and synthetic rubbers.

When selecting plastic and polymer materials for food machinery, materials that are allowed to be used should be selected according to the requirements of food media in health quarantine and the relevant regulations of the national health quarantine agency. Generally speaking, all polymer materials that come into direct contact with food should ensure that they are absolutely non-toxic and harmless to the human body, should not bring bad odors to food and affect the taste of food, should not dissolve or swell in food media, and should not react chemically with food.

Therefore, low-molecular polymers containing water or hard monomers should not be used in food machinery, because such polymers are often toxic. When some plastics are aged or work at high temperatures, such as high-temperature sterilization, they can decompose soluble monomers and diffuse into food, causing food to deteriorate.

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