New trend of pneumatic technology in the field of

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The new trend of pneumatic technology in the field of food production

which driving technology is in line with the needs of future development? This problem is increasingly appearing in the forums of professional and technical lectures and exhibitions. However, in practical application, this problem is not as hot as theoretical discussion. Instead of trying to make principled decisions, enterprises are constantly seeking the most meaningful driving solutions in terms of economy and technology. For example, in the field of food production, Mr. Frank seehausen, who is in charge of user projects and System Technology Department of Bosch Rexroth company in Hannover, said: "there is no doubt that pneumatic drive system must be used due to the particularity of food production."

professional factories that drive technology on this basis, such as Bosch Rexroth, have adjusted the business direction of the enterprise: not only R & D and production of pneumatic components, but also gradually began to produce trial samples combined with electrical technology

seehausen said, "pneumatic technology is indispensable when power drive in contact with food is needed." The reason for this is mainly determined by the high hygiene requirements of food production, that is, there are high hygiene and safety requirements for the driving system of automatic devices in food, medicine and chemical production equipment, such as loose ones: from the beginning of production to the final packaging, it must always meet the high hygiene requirements. These fields have long become the exclusive territory of pneumatic technology. According to experts from Rexroth company, pneumatic technology can be simple and reliable, and the transportation industry also has plastic granulator technology to solve the problem of waste foamed plastics, which may benefit from preventing the invasion of different liquids and vapors, and realizing the requirements of different protection levels (IP protection levels)

the pneumatic guide cylinder in the packaging equipment contacts with the produced food, which can easily carry out sanitary cleaning and sterilization

this situation has not changed so far, and the proportion of food industry enterprises as an important application field of pneumatic technology is increasing. For example, in the global economic crisis, the traditional industrial fields have been strongly impacted, while the food, chemical and pharmaceutical production fields have less impact. Mr. J ü rgen keck, the leader of Mader company, has always believed that the "demand for pneumatic systems has increased" in these fields, which has also promoted the research and development process of the company's new products. This is also very obvious in various industrial exhibitions in 2009: more and more parts in the field of pneumatic technology are made of stainless steel raw materials

one reason for using stainless steel raw materials to manufacture pneumatic parts is that it can greatly improve the service life of components. Mr. Keck said, "stainless steel is a very strong material, which can ensure the long service life of pneumatic components." Pneumatic components made of stainless steel can meet the requirements of high temperature, corrosion protection and chemical corrosion resistance, which must be met in modern equipment. In 2008, great progress has been made in product research and development in this field. Ralf Friedrich, production manager of Camozzi Co., Ltd. in albertshausen, took the user's design specification as an example to explain that the user's design specification in the field of food, medicine and chemical production clearly puts forward high requirements for the materials of pneumatic components. For this reason, 21 manufacturing plants under the Italian Camozzi group began to provide users with new product solutions for complete sets of stainless steel pneumatic components

food production and packaging is the second largest application field of pneumatic drive technology. According to the relevant analysis of VDMA fluid technology professional association of German machinery and equipment manufacturing association, the sales revenue of pneumatic technology products accounted for more than 9% of the total sales revenue in this field in 2008. In 2009, due to the impact of the economic crisis, this proportion may rise to double digits. In particular, the global economic crisis has led to a significant recession in other fields, which has highlighted the better demand for pneumatic systems in the food and packaging fields. These can be proved by the obvious increase in the sales of stainless steel pneumatic components

the rise in the price of raw materials will not affect sales.

in the food and packaging industry, these stainless steel parts are precisely the parts in contact with raw materials or finished products. Therefore, the pneumatic components located on the side of the pneumatic actuator in the working area of the machine tool must be cleaned and disinfected frequently

sometimes the detergent used has a strong corrosive effect, Mr. Friedrich said, which requires components to have high chemical corrosion resistance and corrosion resistance; Therefore, in the field of food and drug production, stainless steel materials are required to be used to manufacture these components. Camozzi's production manager also believes that even if the price of stainless steel materials rises as it did three years ago, it will not shake its position in the field of pneumatic technology. "Because it is impossible to use other materials in certain application fields." The production manager affirmed

nowadays, the output of cylinders made of stainless steel is almost the same as that of cylinders made of other materials. "The materials that can be used for cylinders are aluminum alloy, brass and stainless steel." Mr. Keck said. This situation did not change much during the economic crisis in 2008, although the price of stainless steel remained high at that time. The leader of Mader also recalled, "there is only a small difference." Therefore, alternative materials will not appear in the next round of material price increases. "In the short term, it is difficult to produce new materials to replace stainless steel." This is Mr. Keck's prediction for the future, especially when there is no significant change in the temperature requirements, chemical corrosion resistance and pressure resistance requirements of materials

in the traditional application field, the most commonly used material of cylinder is cast aluminum alloy material that has been anodized. In most cases, these aluminum alloy materials are in the form of pipes, profiles and cylinder end caps. The cylinder piston and piston rod are generally made of stainless steel with quenching heat treatment and rolling surface. However, the assembled cylinder is often a "mixture" of metal and plastic. As Mr. Friedrich observed, "the development trend of cylinder head and piston materials is glass fiber reinforced synthetic materials." The production manager of Camozzi company in Italy also confirmed this development trend: the components of pneumatic system were made of nickel plated brass "at the beginning as before", but in some specific application fields, the application of synthetic plastic pneumatic components is more important

in the traditional field, synthetic plastics will replace metals

Mr. Friedrich said that the value of synthetic plastics lies in its better mechanical properties and chemical corrosion resistance than metal materials. The increase in the consumption of synthetic plastic materials in the field of pneumatic technology is closely related to the production and processing costs and material costs. As Mr. keck, the production manager of Mader company, said, pneumatic system components made of synthetic plastics first "need to have a large batch, and at the same time, the bearing capacity of these components is not high", such as plug-in connectors of pneumatic systems. For plug-in connectors, Mr. Keck said, "due to price reasons, some enterprises choose cheaper plastic materials as alternative materials." In the research and development of pneumatic control valve, people can also see the figure of replacing steel with plastic. Mr. Keck said, "therefore, plastic materials play an important role in the development of pneumatic technology, and will become more important in the future."

the same is true in the field of food production and packaging technology. In particular, when professional pneumatic manufacturers Rexroth, FESTO and Esslingen introduced integrated valve blocks that directly contact food in the machine tool workspace, the requirements for materials also increased. For example, the shell parts of cylinders and connectors should not only be strong and durable, but also have good machining performance and can be manufactured very accurately to meet the requirements of hygiene and cleaning, that is, seamless, grooveless, smooth surface and covered threads. For example, a control valve installation system developed by Rexroth company, according to Mr. seehausen, has a greater gap with developed countries in Europe and the United States. It can meet the high-pressure jet sanitary cleaning requirements of IP 69K, and is a rare product in the market that can meet this requirement

pneumatic components made of stainless steel can meet the requirements of high temperature, corrosion protection and chemical corrosion resistance, which must be met in modern equipment. (end)

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