Conventional Mold Design Changes Were Not an Option

How Mold-Vac helped eliminate flow lines, clogged vents and significant outgassing

A consumer packaging molder faced a major problem. While developing a new cosmetic tub assembly they discovered the PET they had chosen was causing molding issues. The parts design required multiple gate locations to fill with flow lengths over 4 inches and cross-sections less than .100 inch, but resulted in unacceptable knit lines from the multiple flow fronts. Running high temperatures and aggressive fill speeds to minimize the knit lines resulted in significant outgassing of the material, which clogged vents quickly, preventing a sustainable production cycle.

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