Molds & Tooling
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PMMA Short Shot
Problem Phenomenon
Thin-wall long-flow material shortage.
Cause Analysis
PMMA melt viscosity is high and flow is slow; insufficient pressure and speed, low mold temperature.
Solution
①Increase the injection pressure (60~120MPa); ②Raise melt temperature and mold temperature; ③Large gate; ④Optimize the runner.
Key Takeaway
PMMA short shot = the pressure account of high viscosity.
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