The key point of temperature control in Shanghai injection molding
process, Shanghai Mulan injection molding processing manufacturer said that the temperature can be different according to the raw materials, and the temperature required for injection molding processing is also different. Too high or too low temperature is not good for processing. This also affects the effect of product rejects. For example, when the temperature is too low, the liquid raw material has an unconventional color; when the temperature is too high, the produced product will have rough edges and cannot be qualified
Injection molding products.
If the speed control in the sprue is fast, there will be burrs, overfilled, burnt, etc. If it is slow, there will be shrinkage, easy section and other undesirable phenomena. Therefore, the pouring speed should be properly controlled to make the finished product reach the standard.
Cooling time control, the cooling time in the mold during the injection molding process is different according to the products to be processed by injection molding. The quality of cooling is directly related to the surface brightness of the product, so special attention must be paid to it.
For injection molding processing, the required conditions include the above. It can be seen that for the basic conditions of injection molding processing, the considerations are: temperature, speed control, cooling time control, etc.
The first is the barrel temperature, the temperature that needs to be controlled during the injection molding process, including the barrel temperature, the injection nozzle temperature, the mold temperature, and so on. Each injection molding plastic has a different activity temperature. The same injection molding plastic has different activity temperature and synthesis temperature due to different sources or trademarks, which is also due to the different distribution of average molecular weight. As a result, the plasticization process of plastics in different types of injection machines is also different, so the selection of barrel temperature is also different.
The key point of temperature control in Shanghai injection molding process, the nozzle temperature, usually this part is slightly lower than the high temperature of the barrel, which is also the reason why Shanghai Mulan injection molding processing factory avoids the salivation phenomenon that may occur in the straight-through nozzle '. The temperature of the nozzle should not be too low, otherwise it will cause premature solidification of the molten material and block the nozzle, or the performance of the finished product will be affected due to the early solidification of the molten material into the mold cavity.
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