Development of the hottest plastic processing tech

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Development of plastic processing technology and auxiliary equipment

now, plastic parts have become an indispensable component in various industrial products, and they are also constantly developing new application fields. In order to meet the needs of introducing new plastic products and market competition, plastic processing technology is developing towards the production of plastic products with high precision, high performance and high added value. For example, DVD, which is currently put into mass production, has an outer diameter of 120mm and a thickness of 1.2mm. It is bonded by two layers of 0.6mm thick plates, so its recording capacity is about 7 times that of single-sided one-layer CD, but the size of DVD information slot is only 300mm and the depth is about 100mm, so it must be formed by high-precision and high stability technology. For another example, many zinc die castings of printers and copiers require high rigidity after they are replaced by thermoplastic parts. Therefore, injection molding technology with increased addition of glass fiber and carbon dimension has been developed. And hollow, on the one hand to reduce the weight of plastic parts, on the other hand to improve the rigidity of gas assisted injection molding technology. In order to facilitate the surface printing or surface decoration of plastic parts such as automobile and mobile shell, an injection molding process for in mold decoration was developed. In this way, the surface of plastic parts can be printed or decorated at the same time of injection molding, so as to improve the added value of plastic parts. Profiled extrusion technology is also developing in the direction of high efficiency and improving the added value of plastic parts. Due to the improvement of forming technology and processing equipment, the production efficiency of rigid PVC hollow shaped parts has been greatly improved. Now? φ The maximum production capacity of 110mm extruder is 600kg/h. It is three times that of 100kg/h in 1980. In 2000, φ The production capacity of RPVC window frame extruded by mm extruder will reach 1.000kg/h. Now we can also use the extrusion method to produce the automobile fender with curved shape, and use the three-dimensional special-shaped extrusion method to form the plastic moulding of the front windshield plate on the automobile outer cover, so as to improve the added value of the special-shaped extrusion. In terms of blow molding, alternate blow molding can now be used to form several materials with different properties. For example, the two ends of the pipe are formed with hard materials, the bellows in the pipe are formed with soft materials, or the two ends of the pipe are formed with soft materials, and the middle part of the pipe is formed with hard materials. This technology has now been successfully used in the production of various pipes for automotive suction systems, and has been proved to be fully in line with the requirements of use. In addition, it is also convenient to use blow molding technology to produce plastic parts such as double wall copier shell, which also improves the added value of blow molded parts. Of course, in order to successfully apply various new forming technologies and check whether the joint of the oil circuit system is tightened, we must reasonably prepare new forming machines and various auxiliary equipment. In this regard, it is more prominent to develop various special molding machines, such as electric injection machines specially used for DVD production, high-performance injection compression molding machines and new gas assisted injection machines. In addition, a variety of high-efficiency automation systems and equipment matching with UL 94 V-0 have been developed. Such as automatic placement of inserts and single inserts such as screws and nuts. The other is the basic operating device of auxiliary tensile testing machine, which integrates stamping processing and insert supply. In order to meet the needs of producing high-quality plastic parts, a drying and preventive heating device for sealing materials before forming was developed. Because the temperature of this dryer is below 1000C, it is very suitable for drying nylon and other plastics that are not suitable for high temperature. There are also mold temperature regulators that can keep the temperature of the moving mold and the fixed mold basically the same. For taking out and handling plastic parts, there are mobile parts taking machines placed on the feed, as well as multi-joint robots that are suitable for in mold decorative forming and multi-functional mold use, which require subversive testing equipment, and can place inserts, move once formed parts and rotate. Although the price of this robot is high, it is expected to be an indispensable auxiliary equipment in the future forming system. Recently, a small servo motor with high power output suitable for this robot has been developed, which further improves the performance of this robot. In addition, various auxiliary devices with automation functions have been developed. Such as pouring and distributing shears, plastic parts stacking machines and plastic parts inspection machines to further improve the production efficiency of the forming process

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