Molds & Tooling
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PSU Wall Thickness Design Constraints
Problem Phenomenon
PSU products designed with too thin wall thickness cause filling difficulty and insufficient strength; mold scrap losses after design changes are large.
Cause Analysis
PSU melt has poor flowability; the ratio of melt flow length to wall thickness is only about 80; product wall thickness must not be less than 1.5mm, mostly above 2mm; thin-wall design is inherently infeasible.
Solution
①In the design stage, wall thickness not less than 1.5mm, recommended above 2mm; ②Check the flow length ratio at 80; ③For thin-wall requirements, switch to high-flow grades or materials; ④Material review before mold design.
Key Takeaway
PSU wall thickness constraints are hard boundaries determined by material flowability; the 1.5mm bottom line cannot be broken; advancing design review avoids mold waste.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
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