Method of manufacturing a brush head by way of an injection molding process

US6695414B2 · kind B2 · utility

Assignee

• M+C Schiffer GmbH · DE

Inventors

• Berthold Meyer · Linz, DE
• Gerd Broecker · Neustadt, DE

Key dates

• Filing date: Dec 21, 2000
• Grant date: Feb 24, 2004
• Expiry date: Oct 23, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/425
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a method of manufacturing a brush head comprising a brush head body carrying bristle bundles, in particular for tooth brushes, by way of injection molding, in which a first plastic component is injected into a first mold cavity for forming a bristle carrier, and ends of bristle filaments projecting into the first mold cavity are encompassed by the first plastic component. In order to guarantee a complete filling of the mold and a favorable reproduction of the mold cavity geometry, but to avoid at the same time a penetration of plastic mass into ducts in which the bristle filaments are held, it is suggested by the present invention that the bristle carrier manufactured during the first step is relocated into another mold cavity, which is larger than the bristle carrier, and which is filled with a hard component. The present invention further relates to a brush head, in particular for a tooth brush, comprising at least one brush head body carrying a bristle bundle in which the fixing-sided ends of bristle filaments are embedded by an over-molding, wherein it is suggested according to the invention in order to provide a brush head complying with the ab…