The development of large-scale Blister molding process
in recent years, China's plastic machine industry has developed rapidly. The blister machine adopts vacuum adsorption on the mold surface, "Now the house with an area of 100 square meters is formed after cooling, which is widely used in plastic packaging, lighting, advertising, decoration and other industries. However, it can be made into transparent lampshades, illuminators, car reflectors, etc. at present, large-scale plastic suction machines are mainly used, and its forming process is also changing in the process of development.
the forming process of large-scale plastic suction machines has three elements: raw materials of large-scale plastic suction machines, forming equipment, setting conditions and forming molds 。
the primary problem in forming and processing large-scale blister materials into products is the formability of large-scale blister materials, that is, the difficulty of forming and processing. This is not only related to its own physical, chemical and mechanical properties, but also related to the process conditions of material plasticization, flow and die. In the past, the solution to this problem mainly depended on human experience, but human experience was limited. 2. The surface of exposed parts of the experimental machine that were not painted should often be coated with some anti rust oil to solve this kind of problem. Many scholars have done a lot of theoretical and experimental research work, and computer simulation of forming process has entered the practical application stage. With the increasing variety of large-scale blister machines, products continue to expand, and the forming process continues to innovate
injection molding and extrusion molding are the most innovative. BASF thermoplastic ultrason E has excellent heat resistance and is also developing rapidly. The automation of the equipment is also getting higher and higher. Computer full-automatic control has been realized in extrusion, injection and hot forming. However, the design and manufacturing of molds still lag behind the development of equipment and process methods, mainly manifested in the low level of mold design and manufacturing, long production cycle and short service life
in the recent two five-year plans, high-precision processing equipment has been introduced to carry out technological transformation of mold design and manufacturing, which has brought China's mold manufacturing technology to a new level. For example, a complete set of injection molds for automatic double cylinder washing machines, a complete set of injection molds for televisions over 25 inches, a complete set of injection molding and compression molds for cars, and micro gears and shafts in precision instruments. It not only meets the requirements of design accuracy, but also greatly shortens the cycle, creating favorable conditions for product upgrading
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