Extrusion & Post
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PARA Gating System and Floating Fiber
Problem Phenomenon
Improper PARA gating system design causes floating fiber; flow distance too long, glass fiber and resin separate.
Cause Analysis
Glass fiber reinforced plastic has poor flowability and the flowability of glass fiber and resin components is inconsistent; flow distance cannot be too long; the melt must fill the cavity quickly to ensure uniform glass fiber dispersion; stagnation and delamination form floating fiber.
Solution
①Design the gating system for short flow; ②Melt fills the cavity quickly; ③Gate position optimizes the flow pattern; ④Runner size sufficient.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The short-flow fast-filling principle of the PARA gating system prevents floating fiber; the flowability difference of the two components is the design starting point; uniform dispersion depends on flow management.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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