Food and packaging industry bearings, food production must be both economic and safe. The process is usually automated, and extreme operating conditions often occur. This requires a high degree of security and reliability. The design of high quality machine components suitable for continuous operation is an essential element here. Strong corrosion
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Because food machinery of the final product is to be human, therefore food machinery is the most basic requirement is security, at the same time, the production of food can't stained by other objects, and the presence of food production and waste water, mechanical anti-corrosion ability is also an important part of, the food machinery with bearing is required at least three basis points, That is, safety, no oil leakage and corrosion protection.In food machinery, commonly used in line with the NSF (national sanitation foundation) H1 standards and comply with FDA (us food and drug administration) standards of food machinery is special grease, and generally use solid lubricating grease, this kind of grease is not easy to leak, generally for urea base - synthetic lubricant oil, add the ultra-high molecular polyethylene thickener curing, Details of lubricants and thickeners, additives
The suffix code of special grease for food machinery is /LP09, /L719, which should be specially indicated when purchasing bearings to prevent procurement errors.
Besides grease, commonly used stainless steel food machinery, plastic bearings and bearing, stainless steel bearings so not easy to rust, so more naisuanjian corrosion, plastic material in addition to the resistance to acid and alkali, water resistance is stronger, but plastic bearings compared to stainless steel bearings, bearing capacity is relatively weak, so the choice of specific needs to "adjust measures to local conditions", "due to the using condition.
In addition to the above stainless steel, plastic bearings and bearing seat, food machinery, also often use synthetic resin sliding bearing, good self-lubrication effect resin material sliding bearing, for not filling grease, so there is no leakage, commonly used in high temperature environment (about 100 degrees, the limit of high temperature grease and resin sliding bearing can resistance to high temperature of 300 degrees), such as high temperature sterilization equipment.
Food processing machinery is one of the many physical and chemical processes that transform raw food materials into other forms by extracting, filtering, grinding, purifying, mincing, liquefying, emulsifying, cooking, pickling, pasteurizing, canning, slicing, cutting.
The final product of food processing will enter the human mouth, so health and safety is extremely important, but every machine is created to save costs and improve work efficiency. When these points are not taken into account, consumer health losses can be high, and if hygiene-related problems lead to costly food recalls and serious reputational damage, the impact on food companies can be devastating.
As with any food processing equipment, the suitability of bearings for a given application needs to be assessed. As with other equipment related to industry, health and hygiene are important considerations. After all, the often humble bearing plays a role in many food-related processes. They are closely involved in equipment such as blenders and mixers, ice-making machines, picking and weighing equipment, and conveyors. They perform millions of cycles and are an essential part of food processing, but are often considered essential. Therefore, workers in the food processing industry may want to know these seven health and hygiene considerations before choosing bearings for their production lines.
1. Consider the expansion index of bearings
Forty-seven percent of food recalls are reportedly due to microbial contamination. Therefore, microorganisms such as bacteria, yeasts and fungi and their accumulation should be avoided. In bearings, materials such as non-food grade nylon should be avoided, as it will absorb water and breed bacteria. Other bearing materials should be carefully studied, and only those thermoplastics that do not expand should be considered, because trapped stagnant water is an environment for microbial reproduction.
2. Choose the right color
White should be the color of choice for the food processing industry, visually clean and hygienic, and many thermoplastics are made of this color and should be considered for food applications that come into direct contact with food. Color enables quality control personnel to quickly ensure that there are no foreign bodies in the system that cause bearing color changes. It also ensures that no color is transferred from the bearing to the food and that no visible foreign matter is detected in the final product.
3. Avoid lubrication
In addition to food grade lubricants can be safely used in food processing machinery, bearing manufacturers will not recommend food processing machinery customers to use lubricating grease bearings because of the variety of other lubricants. But with the progress of industrial technology, plastic bearings can operate well without adding lubricants, so the use of plastic bearings in food processing equipment can well eliminate the food particles captured by lubricants and pollution of the production chain.
4. Ensure the certification of food grade applications
The raw materials of plastic bearings are generally tested by some in-plant processing, such as the application of various water tests, including distilled water, acetic acid and ethanol tests, and fat tests, which may include the use of sunflower oil tests. These aim to determine the inertness of the polymer and the potential for the transfer of compounds in the polymer into food.
5. Avoid toxic ingredients
Thermoplastics are generally preferred over metal components, including bronze, which usually contains lead and tin. As consumers become more aware of the dangers of heavy metals to tissues and organs, it is important for food processing companies to avoid using tin and lead.
6, consider the best bearing fit
When plastic bearings are used in food processing machinery, in addition to the consideration of some bearing physical properties, but also on the bearing installation and fit, because the food remaining in the running clearance of the bushing may lead to the pollution of the whole production chain. The best bearing fit needs to consider the operating temperature, because some bearings expand when heated.
7. Benefit from smoothness
In daily life, we can see that in the process of food processing and production, food processing residues are easy to fall into the cracks in the machinery, so there are requirements on the smoothness of the bearing surface, because they often have a smooth surface, food particles are unlikely to accumulate in it. If they are chosen for their smoothness and lack of cavitation, it is important that they remain dent free and damage free. To this end, improper force installation that may lead to depression, wear or cracking should be avoided. Similarly, bearings should not be treated extremely rough in the process of maintenance.
Three, the importance of food processing machinery bearings
No particular studies have identified bearings as a specific cause of foodborne pathogens, but bearing manufacturers are keen to ensure that the risk of food-related illness or illness associated with their specific components is kept low.
As with other types of equipment, bearings must be investigated to determine the possibility of accidental or non-contact with food. Once this is determined, bearings can be specified according to the health issues appropriate for a given application. With a rapidly urbanizing and increasingly affluent global population, people are spending less time preparing food due to increasing demands on their time, and the demand for processed foods is growing every year.
resistant bearing, effective seal and lifetime lubrication under most conditions, suitable for reliable uninterrupted operation.
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