-the exhaust system is to provide many avenues to air trapped in the mold to get out quickly and easily. Exhaust system need to design for easy air escape, but don't let the molten plastic to go through. -Exhaust system the most commonly used is the exhaust trench on the mold surface and facing grinding around ti tiny light (push) products. In addition, the gas also can escape through the cooling water, the tiny slits of the sliding system, the (Department of dental implants).. ...
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