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China Injection Mold Design

2017/10/26
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The surface of the injection molded product loses heat rapidly through the injection mold wall and the polymer hardens. In China, the polymer is pulled outward, causing all shrinkage to concentrate in the thickest parts of the product leaving holes within the product. In injection molded products with a thickness greater than 6 mm, voids are very difficult to avoid. Check injection mold surfaces that are in contact with the molten resin. Determine if there is more than a 10 degree F temperature difference using a pyrometer. If the temperature difference is greater than 10 degrees between any 2 points, including between the injection mold halves, a difference in shrink rates will occur and injection mold warping will happen. The modern day approach in solving injection mold release problems in China. With such advancements, it is now possible to scrutinize matter and processes in greater detail. This makes it easier to accurately investigate and identify the root causes of injection mold problems.

Design of injection mold is a technique of performing a set of planned experiments to study the effect of the processing parameters on the quality of the part. In its simplest form, studying the length of the part at two holding pressures and relating the change in the length of the part to the change in the pressure for a China made injection mold. Each of the the steps in the 6-Step Study is also a DOE. Warping is a distortion in the intended shape of the injection molded part that occurs during cooling. Warping can make the parts twist, fold, bend and bow. Injection mold design in China should consider the potential for part warping which can be caused by non-uniform mold cooling.

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