Injection Molding
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Thin-wall products with wall thickness <1mm have many short shot, warpage and deformation problems
Problem Phenomenon
Thin-wall products with wall thickness <1mm have many short shot, warpage and deformation problems
Cause Analysis
Thin-wall filling difficult, melt front rapidly condenses, short shot
Injection speed needs to be extremely fast, thin-wall condensation time short
Gate design needs to ensure filling of thin-wall areas
Holding time short, gate rapidly freezes, insufficient shrinkage compensation
Cellulose acetate butyrate flowability needs to meet thin-wall requirements
Solution
Increase injection speed to ensure fast thin-wall filling
Use multi-point gates to ensure filling of thin-wall areas
Raise mold temperature to the high side of 40-80°C to delay condensation
Increase holding pressure to compensate for rapid thin-wall gate freezing
Select high-flowability cellulose acetate butyrate variety
Key Takeaway
Thin wall requires high-speed injection and high-flowability material
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