-A way of escape of gases commonly used anymore is through the cooling system. The picture below shows the crush the mould is inserted 1 piece insert is made from porous metal, capable of leading the gas from the crush of the mold on the cooling channel.Some mold side core puller slide structure, can also take advantage of this structure to the exhaust trench layout.Advantages -Exhaust products are good for the tendon to fix defects of gas drainage by mold and push system is facing. -Cheap.The downside -Pleasing layout of complex mold
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