Method for producing composite bodies

US6296797A · kind A · utility

Assignee

• Ticona LLC · US

Inventors

• Ursula Ziegler · Hochheim, DE
• Klaus Kurz · Kelsterbach, DE
• Frank Reil · Seeheim-Jugenheim, DE

Key dates

• Filing date: May 22, 2000
• Grant date: Oct 2, 2001
• Expiry date: May 22, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2059/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Process for producing a composite article from a polyacetal (component a) with directly molded-on functional elements made from one or more thermoplastic elastomers (component b), and wherein components a and b have differing hardness, and the material with the greater hardness (component a) is initially premolded in a first step in a mold, and then is either cooled and removed from the mold and then placed into another, larger cavity, or is partially removed from the mold, but remains in a portion of the mold, and is then moved to a larger cavity, or, without removal from the mold, remains in the same mold, which is enlarged by means of a movable device, and in a second step, by overmolding with the material with the lesser hardness (component b), the molding formed from component a is firmly bonded to this material and is then removed from the mold as a composite article.