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What should we pay attention to in the process of making plastic packaging?

Time:

2021-11-09

What should we pay attention to in the process of making plastic packaging?

1. Avoid ejection and snaking. If the width and thickness of the small gate directly facing the cavity is large, the high-speed plastic melt is injected from the gate into the cavity, resulting in jet and serpentine phenomena due to the high shear knife.

2, as far as possible to shorten the flow distance, to reduce pressure, heat loss 'to improve the utilization of materials.

3. When the wall thickness of plastic parts is large, under the premise of avoiding spraying, the sprue should be opened at the Z thickness of plastic parts, so as to make use of melt flow, exhaust and feed, and avoid the sagging of shrinkage holes or surface plastic parts.

4. Due to the mold structure, plastic shape, gate position and other reasons, melt will form two or more strands of joint when filling the cavity, which is easy to produce fusion marks, thus affecting the quality of plastic products, especially serious when glazing plastic products. Direct casting kiln, ring kiln, disc casting kiln, point kiln and so on to avoid fusion marks.

5, conducive to the flow of plastic melt. When the plastic parts have steel bars, the steel bars can be used as a channel to improve the melt filling rate. The gate should be positioned so that the melt can flow in the direction of the reinforcement

6, conducive to the cavity exhaust. After the gate location is determined, the exhaust groove should be opened or the clearance of parting surface, push rod clearance and other active parts of the mold should be opened in the cavity Z, after the filling position or away from the kiln.

7, reduce the warping deformation of plastic parts. For large flat plastic parts, if there is only a central gate or side gate, the plastic parts will be warped and deformed.

Huizhou Xinweiyi Industrial Co., Ltd.

Tel：135 1666 2893 （Mr. Huang）

E-mial：hwc@hzxwy.cn
Add：1st Floor, No.1 Longhu 6th Road, Shuikou Street, Huicheng District, Huizhou