Method for manufacturing housing or control-component parts of metal

US6345432B1 · kind B1 · utility

Assignee

• Preh-Werke GmbH & Co. KG · DE

Inventors

• Karl-Heinz Bauer · Graben-Neudorf, DE
• Joachim Storath · Freiensteinau, DE
• Gerold Eckert · Bad Neustadt an der Saale, DE
• Klaus Mueller · Unsleben, DE

Key dates

• Filing date: Apr 7, 2000
• Grant date: Feb 12, 2002
• Expiry date: Apr 7, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/4998
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for manufacturing housing or control-components parts of metal including the steps of: manufacturing a housing or control-component part (1, 3) as a forged or cast blank (4, 5), stamping a recess (6) in the blank for an indicator insert with a stamping die in a stamping device, thereby creating a protrusion (7) on a back wall surface (8) of the part in the stamping direction, constricting the recess (6) with peeled protrusions of the peripheral walls (9) defining the recess (6), injecting a transparent plastic (2) into the recess (6) and, if applicable, into a mold connected with the recess (6) for forming a collar (10) on a front wall surface (11) in the stamping direction, and ablating the back wall surface (8) and the protrusion (7) by a fixed thickness amount (12), which results in exposure of the recess (6) and of the transparent plastic (2).