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Weld line suppression

  • US 6,261,488 B1
  • Filed: 11/02/1994
  • Issued: 07/17/2001
  • Est. Priority Date: 11/02/1994
  • Status: Expired due to Fees
First Claim
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1. A process of operating an injection molding machine to manufacture, in a mold cavity, a substantially weld line free plastic part comprising the steps of:

  • injecting a measured quantity of foamable plastic material from the machine into the cavity;

    reducing the volume of the cavity along with the volume of the material therein sufficiently to produce an essentially foam-free part; and

    allowing the material to solidify.

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