Development of plastic processing technology and auxiliary equipment

At present, plastic parts have become indispensable components in various industrial products, and they are constantly developing new applications. In order to meet the needs of launching new plastic products and competing in the market, plastics processing technology is to develop high-precision, high-performance and high value-added plastic products. For example, the DVD currently being put into mass production has an outer diameter of 120 MM and a thickness of 1.2 MM, which is formed by bonding two layers of 0.6 MM sheets, so its recording capacity is about 7 times that of a one-sided one-layer structure CD. However, the information slot size of the DVD is only 300 MM and the depth is about 100 MM, so it must be formed with high precision and high stability technology. Another example is that many zinc-die-cast parts for printers and copiers are required to have high rigidity after they are changed to thermoplastic parts. To this end, injection molding techniques have been developed to increase the amount of glass fiber and carbon fiber added. 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 printing of letters or surface decorations on the surfaces of plastic parts such as automobiles and mobile phone housings, in-mold decorative injection molding processes have been developed. In this way, the surface of the plastic part can be printed or decorated at the same time as the injection molding, thereby increasing the added value of the plastic part. Shaped extrusion molding technology also develops to high efficiency and increase 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. The highest output of the φ110MM extruder is now 600KG/H. In 1980, production was three times 100KG/H. In 2000, φ130-135MM extruder extrusion RPVC window frame production will reach 1.000KG / H. It is now also possible to produce a curved car fender by an extrusion molding method, and to form a front windshield plate plastic molding strip on an automobile outer cover by a three-dimensional special-shaped extrusion method, thereby increasing the added value of the profiled extrusion. In blow molding, it is now possible to perform alternate blow molding of several different properties using alternate blow molding methods. For example, both ends of a pipe are formed of a hard material, a bellows located in the pipe is formed of a soft material, or both ends of the pipe are formed of a soft material, and a middle portion of the pipe is formed of a hard material. This technology has now been successfully used in the production of a variety of pipes for automotive suction systems and has been tested and found to be fully compliant with the requirements of use. In addition, it is also easy to use blow molding technology to produce plastic parts such as double-walled copier shells, thereby increasing the added value of blow molded parts. Of course, in order to successfully apply various new forming technologies, new types of forming machines and various auxiliary equipment must be properly formulated. More prominent in this regard is the development of a variety of special molding machines, such as electric injection machines for the production of DVDs, high-performance injection compression molding machines and new gas assisted injection machines. In addition, a variety of high-efficiency automation systems and equipment have been developed to match them. Such as automatic placement of inserts and screws, nuts and other single inserts. There is also an auxiliary device that integrates punching and insert supply. In order to meet the need of producing high-quality plastic parts, a forming pre-sealing material was developed for drying and preventing heating devices. Since the temperature of this dryer is less than 1000C, it is very suitable for drying nylon and other plastics that are not suitable for high temperatures. There is also a die temperature controller that can keep the temperature of the movable die and the fixed die substantially the same. The mobile pick-up machine for taking out and transporting the plastic parts is also suitable for in-mold molding and multi-functional molds. It can be used to place insert parts, move primary parts, and rotate multiple joints. Robot. Although the price of this robot is high, it is expected that it will be an indispensable auxiliary equipment in the forming system in the future. Recently, small-sized high-power output servomotors suitable for use with such robots have been developed, and the performance of such robots has been further improved. In addition, various auxiliary equipments with automatic functions have also been developed. Such as pouring material cutting machine, plastic parts stacker and plastic parts inspection machine, etc., to further improve the production efficiency of the forming process.