Method for the manufacture of curved plastic pieces

US5167891A · kind A · utility

Inventors

• Henk Dijkman · IJlst, NL
• Henk Dijkman · Solingen, DE

Key dates

• Filing date: Dec 30, 1991
• Grant date: Dec 1, 1992
• Expiry date: Dec 30, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/40
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In the method for the manufacture of curved plastic pieces, such as brassiere underwires, the plastic pieces are formed from hot plastic material in a selected mold and are cooled to solidify the plastic material. In the improved method, a continuous thermoplastic wire in its thermoplastically formable state is coiled into a coil and simultaneously cooled thus forming turns of a solidified coil. The turns are subsequently cut along the axis of the coil over the entire length of the coil to produce the curved plastic pieces.