For thin wall plastic parts molding,high speed precision molding machine is the key point. At the same time, thin- wall molding has high requirement for the high speed injection molding, like high injection speed,  high  responsibility,high clamping force, and high efficiency and precision plasticization system.

Thin wall plastic product, usually wedefine the thickness below 1mm as the thin wall plastic parts. Obviously thin walled plastic parts, the thinner the wall, the lower the cost of plastic materials. Take the fast food box for example, the standard thickness is 0.5mm,if we can decrease its thickness to 0.4mm, then its material cost can be decreased by 20%. At the  same time,since the wall is thicker, it will shorten the plasticizing time and cooling time, thus to shorten the whole cycle time,improve the molding efficiency.

During the molding process, because the mould die surface is cold, when the plastic melt fill the cavities, it  will form a solidified layer, which can smaller the flowing runner area. If the solidified layer completely  freezes, it will stop the plastic melt flowing into the cavities, and the plastic parts will appear unfilled or flash  issue.Usually, the thinner, the easier these issues caused.

In order to solve these problems, we must increase the injection speed, which can be completely filled before the plastic melt cavity. For the traditional injection molding machine, injection speed isusually  80 ~ 100mm / s, can not meet the requirements of  thin-walled injection molding.In order to increase the injection speed, usually we will pump the motor capacity, assembly accumulator.

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Post by Amanda Pan

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