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Abstract：
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The plastic parts of double-cover cellphone become complex day by day, front cover structure not only complex, moreover the precision request is also high, which causes the difficulty in mould design and manufacture. As for the design method of front cover mold, there are some quite novel design ideas. Pouring system choices two fan-shaped runners, which makes the flowing speed of the melting body even and shorten the running channel flow, thus can reduce the internal stress of the product to prevent the air from being led into the cavity body; The forming of two assembling axe holes of both front and back covers, with the adoption of the special organization of side pulling out the core, has reduced the mould production cost and solved the big problems, such as small position, structure limits, difficult disengaging organization design; Trying to form it by means of pulling out vacuum, such as designing the exhaust trough and the exhaust eyelet in the mold, adopting the seal packing collar for seal and achieving the connection with vacuum equipment, therefore, this can effectively improve the injection filling mould condition of the plastic melting body, be convenient for the flowing and exhausting of melting plastics, and effectively enhance the quality and the production efficiency of plastic parts.
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AuthorIntro：
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Reference：
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[1]屈华昌·塑料成形工艺与模具设计[M]·北京:机械工业出版社,2004.
[2]《塑料模具设计手册》编写组·塑料模具设计手册[M]·北京:机械工业出版社,1982.
[3]Jack Avery,杨卫民,丁玉梅,译·气体辅助注射成型原理及应用·北京:化学工业出版社,2003.
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