Process for injection molding and hollow plastic article produced thereby

  • US 5,098,637 A
  • Filed: 07/11/1988
  • Issued: 03/24/1992
  • Est. Priority Date: 07/11/1988
  • Status: Expired due to Term
First Claim
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1. A process for injection molding a hollow plastic article comprising the steps of:

  • injecting a quantity of fluent plastic into a mold cavity having a shape defining at least a portion of the article;

    displacing a portion of the plastic from the mold cavity into a spill cavity flow coupled to the mold cavity by introduction of a charge of pressurized gas into the mold cavity;

    permitting the injected plastic to solidify;

    venting the gas from the mold cavity; and

    removing the plastic article from the mold.

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