In pressed plastic products, solving the problems of shrinkage coefficient is very difficult. 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.In plastic manufacturing, the products have a greater thickness, the greater the shrinkage factor triggers the defects concave co, warping, moreover with intricate detail work fill the plastic mixture is very difficult. Shrinkage factor is dependent on many factors (temperature, volume, pressure, plastic injection molding components...) and the calculation depends heavily on the experience of the people active in the field of plastic injection mould granaryThus, solving the error incurred by the shrinkage factor is very important.Thus, the advent of injection technology aimed at solving this problem on the products allow for the empty hole in the middle. This is the most important purpose for the introduction of injection molding technologies are supported.
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