At present, with the continuous upgrading of environmental protection pressures, the state has issued a number of relevant policies and regulations in order to accelerate the treatment of the atmospheric environment. The coating iron, which is an important processing material for metal packaging, is a highly polluting industry and is strictly controlled and regulated by the state. One of the products. The industry knows that paint iron will produce a lot of substances that will cause harm to the environment and human body during production and processing. Not only that, environmental protection reform and governance will inevitably bring about an increase in costs for enterprises. Therefore, SMEs that are already struggling are faced with the risk of closing down. They may even cause some companies to take risks and put production into the underground. Many adverse consequences.
Zhang Wencan, the former senior director of the China Food Fermentation Research Institute, said that although the new environmental protection policy has had a major impact on the traditional high-pollution industry, it is also an opportunity to promote the transformation and upgrading of the company. Coating iron has no future. Visionary companies have already started to transform and develop new products. The iron-coated iron that is widely viewed by the industry is the future direction.
Ten years ago, Zhang Wencan and his entourage went to Japan to inspect the Iron Printing Plant. At that time, there were only one Indian iron companies in Japan. Zhang Lao said that this situation is mainly due to the pollution of paint iron, and at this time the technology of coated iron has been popular in Japan, and Britain, France and Germany have also become popular. From these developments, we can foresee the future of China's coating iron, so he also attaches great importance to the development of coated iron, and personally.
However, as the forerunner in the study of coated iron in China, Zhang Lao believes that the application of coated iron in the food field in China is still in its infancy, both for R&D and use, although coated iron products for light food Already there are some domestic production, but the successful technical indicators are not. Although in 2008 we released the test data of adhesion and transmittance in the United Kingdom and Japan, the indicators, performance and stability of domestic products still need time and market. Further research.
Zhang Wencan introduced that the quality of coated iron mainly considers three technical indicators: film thickness, adhesion, and transmittance. Among these three technical indicators, the most important is adhesion. This value is related to the film. The key to the effect, but at present there is not a unit in the country and even the world that exposes an accurate detection method. A domestic company applied for a test method patent in 2008. However, due to lack of verification, it cannot prove its feasibility and reliability.
According to Zhang Wencan, as early as the 1970s, the China Food Fermentation Research Institute had announced three basic technical indicators for coating on metal substrates. In 1977, it disclosed a variety of testing methods for the adhesion of coating films. Including the pull method and the related large amount of data. Moreover, these indicators, data, and methods have been well documented by the technology and market, and have played an important role in regulating the production and market behavior of companies. Although these technical method indicators are for coating iron, they are also fully applicable to the detection of coated iron.
In view of the more advantages of coated iron compared to coating iron, especially in terms of hygiene. Zhang Wencan suggested that in the development of testing methods and eligibility criteria, we can refer to existing successful experiences.
Adhesion, transmittance, film thickness, you have the index value of these three technologies? Can you take it out? If it is a filling company, can you actively request for the tank to provide the indicators of these three technologies? What about the value?
Tapping Screw
Although there are many types of tapping screws, they all have the following similarities:
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.
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