Blow Molding
4 조회수
Orange peel appears on the surface of general-purpose polyethylene blow molded products
문제 현상
A rough texture similar to orange peel appears on the surface of the blow molded product, affecting the appearance quality.
Orange peel is usually caused by irregular parison surface or poor mold surface replication.
원인 분석
（1）The parison surface is rough (melt fracture or sharkskin)
（2）The mold surface is rough or the venting is poor
（3）The blowing air pressure is insufficient, and the melt is not fully attached to the mold
（4）The mold temperature is too low, and the melt cools too fast
（5）The compressed air contains oil or water, contaminating the product surface
해결 방법
（1）Adjust the extrusion temperature and speed to avoid melt fracture on the parison surface (within the range of 160-260°C)
（2）Polish the mold cavity to Ra≤0.4μm and improve the venting
（3）Appropriately increase the blowing air pressure to 0.4-0.8MPa
（4）Appropriately raise the mold temperature to a reasonable value within the range of 30-80°C
（5）Check the compressed air purification system to ensure it is oil-free and water-free
핵심 요약
Orange peel is caused by poor parison surface quality or poor mold replication, and needs to be improved from parison quality and blow '2079851475616104453.
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