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For some the stereotypes, the use of the methods of traditional gas escape is not thorough, due complicated mold pleasing texture, there are many dead spots (dead pocket) causing the air cannot escape completely. The vacuum methods have overcome these problems.The image above presents a structure summary of the system, including:+ The lead track to air out 1 grooved gas surround the perimeter of the mold.+ 1 external gaskets from rubber to insulate between the external environment and inside the mold, making the outside air may not reach the mold. + Gas reservoir trench: design of the holes to connect the vacuum pump. The principle of operationWhen the mold closes, vacuum pump are open to putting the entire amount of the air out of the mold, giving the volume inside the vacuum is completely; so, when the plastic is sprayed on will not be hampered by the amount outstanding.The beginning of open vacuum pumpTo know the time of the start of air out of the mold, please proceed to close the mould and put a vacuum gauge at the bottom of the plastic nozzle. Then, start the vacuum pump and open time to suck the entire mold in the air out. From this information help for determining the open time for the vacuum.
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