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Bubbles Of Common Problems In Injection Molding
According to the causes of bubbles, the solutions are as follows:
1) When the wall thickness of the product is large, the cooling speed of the outer surface is faster than that of the center part. Therefore, with the cooling process, the resin in the center part shrinks and expands to the surface, resulting in insufficient filling in the center part. This is called a vacuum bubble. The solutions are as follows:
a) According to the wall thickness, determine the reasonable gate and sprue size. Generally, the gate height shall be 50% – 60% of the wall thickness of the product.
b) Until the gate is sealed, a certain amount of supplementary injection material is reserved.
C) The injection time should be a little longer than the gate sealing time.
d) Reduce injection speed and increase injection pressure,
e) Adopt the material with high melting viscosity grade.
2) The solutions to the bubbles caused by the generation of volatile gases are as follows:
a) Sufficient pre drying.
b) Reduce the temperature of resin to avoid decomposition gas.
3) The bubbles caused by poor fluidity ...
... can be solved by increasing the temperature of resin and mould and the injection speed.
Coupon code: freeshipping on any order over 2000USD from jasonmolding.com
About JasonMould Industrial Company Limited
low volume manufacturing service
Jasonmould is a China mold maker of plastic molds- injection mold, die casting moulds, plastic blow molding, rotational molding, medical plastic injection molding, two shot plastic injection molding, insert molding, overmolding, metal injection molding, micro injection molding, powder injection molding, ceramic injection molding, liquid injection molding, husky injection molding, household mold, casting mold, die mold tool, custom molds, china moulds, rapid prototyping tooling, plastic prototyping tooling, punch press tooling, die and tooling for mobile/ cell phone parts, automotive parts, vacuum cleaners, rechargeable tools, telephones, copiers, computers, multimedia speakers, and many other electronic products and household appliances. And also a plastic product manufacturer, mold manufacturer China– plastic parts, plastic water tank, plastic balls, plastic containers, plastic buckle, plastic anchor, plastic hanger, plastic spoon, plastic pipe fitting, plastic tumble, plastic tableware, plastic cups, plastic bottles, plastic tray, plastic cosmetic container, plastic case, plastic food container, plastic chairs, plastic caps, plastic cap closure, plastic tubes, plastic water pipes, plastic knobs, plastic tubing, plastic utility boxes, plastic racks and so on.
Person: James Yuan
Company: JasonMould Industrial Company Limited
Add: LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong Province, China
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