Higher holding pressure and cavity pressure make the products


Posted October 19, 2020 by HouseholdMould

which not only brings convenience to mold manufacturing, but also reduces waste and improves economic efficiency. This can be explained as the molten resin is compressed under the molding pressure.  
 
In the state of still high and low flow resistance, it enters the pressure maintaining and filling stage earlier. It is possible to reasonably determine the reasonable tolerances and corresponding mold manufacturing tolerances of various materials and plastic parts, which not only brings convenience to mold manufacturing, but also reduces waste and improves economic efficiency. This can be explained as the molten resin is compressed under the molding pressure.  

Higher holding pressure and cavity pressure make the products in the cavity compact and reduce shrinkage, especially the pressure in the holding pressure stage has a greater impact on the shrinkage rate of the products. This is because the increase in pressure increases the injection speed. In addition, the pressure of each cavity of a multi-cavity mold should be designed uniformly, otherwise the shrinkage rate of each cavity will be inconsistent. Especially for thin-walled plastic parts and small gate plastic parts, due to the fast cooling rate, the filling process should be shortened as much as possible. The higher the pressure, the greater the amount of compression that occurs, and the greater the elastic recovery after the pressure is released, making the size of the plastic part closer to the size of the cavity, so the shrinkage The smaller.  

However, even for the same product, the pressure of the resin in the cavity Buy plastic mould is not the same in each part; the injection pressure is different in the parts where the injection pressure is difficult to act and the parts where the injection pressure is easy to act.Increasing the injection pressure can reduce the shrinkage of the product. After the filling process is accelerated, on the one hand, the melt temperature is increased due to the shear heating of the plastic melt and the flow resistance is reduced; on the other hand, it can also be at the melt temperature.
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Issued By injection pressure
Country Bosnia and Herzegovina
Categories Fitness , Government , Home
Last Updated October 19, 2020