The development of large vacuum molding machine molding process - Union star packaging machinery

Large vacuum molding machine molding process has three elements: the large plastic raw materials, forming equipment and setting conditions and forming mold. Large vacuum molding machine materials forming into products, the first question is a large vacuum molding machine material formability, namely the ease of forming. This is not only related to physical, chemical and mechanical properties of itself, and plasticizing, material and process flow, process conditions of progressive die. To solve this problem in the past relied on people's experience, but experience is limited, can not successfully solve the problem. Many scholars have conducted a lot of theoretical and experimental research, using computer to simulate the forming process has entered the stage of practical application. As the large vacuum molding machine varieties increased, expanding products, forming process and continuous innovation. With injection molding and extrusion molding innovation most, plate hot forming technology is also developing rapidly. Devices will become more and more high degree of automation, the computer full automatic control, has been implemented in extrusion, injection, hot forming. But mould design and manufacturing is still lagged behind the development of equipment and process methods, main performance in the low level of mold design and manufacturing, production cycle is long, short service life. Two recent five-year plan within the introduction of high-precision processing equipment, to the mold design and manufacture of technical renovation, make the mould manufacturing technology in China on a stage. Two cylinder washing machine, for example, complete sets of injection mold, 25 inches or more television sets of injection mold, car on complete sets of injection molding, compression molding, and precision instrument in the micro gear and shaft, etc. Not only meet the design accuracy requirement, and the cycle is shorten, have created favorable conditions for product upgrading.