Molds & Tooling
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Internal shrinkage porosity in TPU thick-walled products
Problem Phenomenon
The central part of the thick-walled parts is loose or has voids
Cause Analysis
The center cools slowly, the feeding runner solidifies too early
Solution
Optimize the gate position and size, extend the holding pressure, increase the pressure
Key Takeaway
Internal quality of thick-walled parts is a technical difficulty
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