2016年3月31日星期四

Causes of injection molding process


Injection molding process presumably we have heard of, it is to have a certain shape of the model, through the pressure of the molten state of the colloid into the cavity and molding. The process also has a wide range of applications in the manufacture of metal parts for injection molding. In fact, parts of the molding process is affected by a lot of factors. The following ZCMIM will be described in detail.

The temperature of the mold and the barrel has an important influence on the injection molding process. The lower the mold temperature, the faster the cooling rate, the melt temperature decreases more rapidly, resulting in increased melt viscosity, injection pressure loss increased, and even lead to a serious shortage of mold filling. In addition, the proper choice of barrel temperature is related to the quality of plastic. In view of this, we'd better control the nozzle of the highest temperature slightly lower than barrel the highest temperature, to prevent the melt in the nozzle occurred casting phenomenon.

The injection speed injection speed, it is mainly in the cavity Nader effect of melt flow behavior. With the increase of injection rate, the melt flow rate increases, the shear effect of the melt temperature increases, the viscosity decreases, so it is good for filling the mold. Moreover, in the whole injection molding cycle, the injection speed and cooling time have a decisive influence on the performance of the product.


The above two points are the main factors that affect the injection molding process, we can according to the situation of the injection process to adjust the system, in order to ensure that the quality of the injection process.

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