Patent ID: 7425126
Filing Date: 2008-09-16
Classification: B22D,B29C

Abstract:
1. A molding-system valve for use with a screw being received in a barrel of a molding system, the molding system being configured to process a molten molding material, the molding-system valve comprising: a stem being configured to extend from the screw, the stem having a stem tip; a check ring defining a bore, the bore receiving the stem; a retainer extending from the stem, the retainer being offset from the stem tip of the stem; and a knockdown retainer being located proximate the stem tip of the stem, the knockdown retainer being located offset from the retainer, the knockdown retainer and the retainer cooperating to permit limited stroking of the check ring between the knockdown retainer and the retainer, the knockdown retainer defining a melt passage extending through the knockdown retainer, the knockdown retainer including: