Molds & Tooling
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PPS high mold temperature side effects
Problem Phenomenon
After increasing mold temperature to improve the surface, product impact strength decreases instead and becomes brittle
Cause Analysis
High mold temperature makes PPS crystallize more fully, hardness and rigidity rise, but at the same time impact strength decreases and the product becomes more brittle; mold temperature adjustment is a trade-off between surface gloss and toughness, and must be chosen according to product positioning
Solution
①Balance mold temperature according to product requirements: take high for appearance priority, take low for toughness priority; ②do not excessively pursue high mold temperature for load-bearing parts; ③re-verify impact performance after changing mold temperature
Key Takeaway
There is no free lunch with PPS mold temperature; the rigidity gained from crystallinity comes at the cost of toughness, position according to use; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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