It is understood that China's special chemical materials have been developed in the 1950s in the last century. We have organized dozens of key scientific research projects such as rocket fuel, heavy water, aerospace glass, aramid, carbon fiber, marine coatings, and silicon fluoride. Thirteen major new chemical materials. For half a century, China's independent research and development and production of special chemical materials have made significant contributions to China's two bombs and one star, new combat aircraft, tanks, artillery, naval vessels, military electronics, and Shenwu and Shenwu.
At present, the rapid development of cutting-edge technologies such as the defense industry and aerospace industry in China is increasingly demanding for the performance and functions of supporting materials. The requirements for supporting systems, organization and management, and demand guarantees are becoming more and more stringent. National specialty chemical materials are being supplied and operated. The lack of communication between the parties has seriously affected the development of the industry. Delegates felt that it was more and more urgent to play the role of coordinating and serving the industry organizations, and it was time for special chemical materials to unite in the plan.
In view of the current situation of the improvement of the special chemical industry in the country but the lack of communication between the supply and demand sides, the meeting proposed that the “Special Committee on Special Chemical Materials of the China Petrochemical Association†should be established as soon as possible. The establishment of a large platform for special chemical material special committees can integrate the technologies, equipment, and human resources of petrochemicals, universities, Chinese Academy of Sciences, and military systems across industries, and form an organically integrated supporting system that will benefit the defense industry and cutting-edge technologies for specialty chemical materials. The long-term demand is conducive to the combination of military and civilian and civilian technology as well as the development of special chemical materials industry.
Extrustion Blow Molding Machine
Blow moulding machines can be divided into three categories: extrusion blow moulding machines, injection blow moulding machines and special structure blow moulding machines. Stretch blow molding machines can be classified into each of the above categories. Extrusion Blow Molding Machine is the combination of extruder, blow molding machine and die closing mechanism, which is composed of extruder and blank die head, blow expansion device, die closing mechanism, blank thickness control system and transmission mechanism. The blank die is one of the important components that determine the quality of blow molding products, usually including the side feed die and the center feed die. The storage cylinder type blank die head is often used for large products during blow molding. The minimum volume of the storage tank is 1kg and the maximum volume is 240kg. The parison thickness control device is used to control the parison wall thickness. The maximum control point is 128 points, generally 20~30 points. The extrusion blow molding machine can produce hollow products with a volume range of 2.5ml~104l.
Injection blow molding machine is the combination of Injection Molding Machine and blow molding mechanism, including plasticizing mechanism, hydraulic system, control electrical apparatus and other mechanical components. Common types include three-station injection blow molding machine and four-station injection blow molding machine. The three-station machine has three stations for preforming, blowing and demoulding, each of which is separated by 120 °. The four-station machine has more pre-forming stations, each of which is separated by 90 °. In addition, there is a dual-station injection blow molding machine with 180 ° between stations. The plastic containers produced by the injection blow molding machine are accurate in size and do not need secondary processing, but the mold cost is high.
The special structure blow molding machine is a blow molding machine that uses sheet, molten material and cold blank as parison to blow mold hollow body with special shape and purpose. Due to the different shapes and requirements of the products produced, the structure of the blow molding machine is also different.
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