Process of plastic injection molding products - the need to control temperature - - - - - - Xiang in the plastic
How to control temperature process of plastic injection molding products need? Below with flying over the small make up together: 1, cylinder temperature, injection molding process, the need to control the temperature of the cylinder temperature, nozzle temperature and mould temperature, etc. The first two main influence plastic plasticizing temperature and flow, and then a temperature is mainly influence plastic flow and cooling. Each kind of plastic flow with different temperature, the same kind of plastic, due to different sources or brand, the flow temperature and decomposition temperature is little different, this is due to the different average molecular weight and molecular weight distribution, plastic in different type of injection machine of plasticizing process is also different, so choose the cylinder temperature is not the same. 2, nozzle temperature, nozzle temperature is usually slightly below the cylinder of the highest temperature, this is to prevent the molten material in straight through the nozzle of 'salivate phenomenon may happen. Nozzle temperature also cannot too low, otherwise will cause early setting of melting and the nozzle clogging, or due to early coagulation material into the cavity affect the performance of the products. 3, mold temperature, mold temperature has great influence on the intrinsic properties of the products and apparent quality. Mold temperature is determined by the size of the plastic, of crystalline products and structure, performance requirements, and other process conditions, Melting temperature, injection speed and injection pressure, molding cycle, etc. ) 。
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