Method and device for controlling the shrink behavior of plastic materials during primary shaping

US7125513B2 · kind B2 · utility

Assignee

• ZF Lemförder Metallwaren AG · DE

Inventors

• Olaf Abels · Belm, DE
• Martin Rechtien · Damme, DE

Key dates

• Filing date: Jan 16, 2003
• Grant date: Oct 24, 2006
• Expiry date: Aug 16, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/32737
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for controlling the shrinkage behavior during the original shaping of plastics during the manufacture of a plastic shell, especially a bearing shell for a ball-and-socket joint, wherein liquefied plastic is introduced between an inner mold (3) and an outer mold (2) in order to be cured therein, wherein the plastic is partially fixed on the outer mold (2) during the curing. This process can be preferably used in a device for controlling the shrinkage behavior during the original shaping of plastics, which has a casting mold, which accommodates at least one outer mold (2) and an inner mold (3) inserted into same, wherein the liquefied plastic (1) to be molded can be introduced between the mold parts (2, 3), wherein means for fixing the liquid plastic (1) are formed on the outer mold (2).