in the injection molding of plastic products solve shrinkage problems very difficult. shrinkage coefficient is the number depends on many factors (speed, volume loss, plastic components, pressure pressed...) the calculation requires more experience. currently CAE software is a tool to assist in the analysis. Shrinkage factor not only reduces the body computer product that it is mainly to make the surface of the product is not beautiful. In particular, in the manufacture of plastic, aesthetic and design is one of the factors was the top concern. Thus, solving the error incurred by the shrinkage factor is very important. large thickness products as easy to have the disabilities co concave warping, the fill the mold in intricate detail is very difficult.
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