Method and device for producing brushes and brushes produced...

A - Human Necessities – 46 – B

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A46B 3/06 (2006.01) A46B 9/08 (2006.01) B29C 45/14 (2006.01)

Patent

CA 2375763

A method for the manufacture of brushes with a plastic bristle carrier and a bristle configuration of individual or bundlewise-combined plastic bristles is proposed, in that the fastening-side ends of the bristles or bundles are melted to a thickening, thickenings of adjacent bristles or bundles are interconnected by aftershaping and displacement of the plastics material and the connections are subse-quently embedded in the plastics material of the bristle carrier. The thickenings are shaped by means of a mould to a clearly defined support structure of webs connecting ad-jacent thickenings and subsequently the support structure and the bristles projecting over the same are embedded by a short length in the plastics material of the bristle carrier. An apparatus for performing such a method and a brush manufactured by such a method are also proposed.

L'invention concerne un procédé de production de brosses avec un support de poils (1) en matière plastique et une garniture de poils fixée dessus, composée de poils en matière plastique (2) individuels ou regroupés en touffes (3). Les extrémités (18) des poils ou des touffes, qui sont situées côté fixation, sont fondues pour produire un épaississement. Les épaississements de poils ou de touffes adjacent(e)s sont interconnectés par postformage et déplacement de la matière plastique. Les raccords sont ensuite noyés dans la matière plastique du support de poils (1). A cet effet, les épaississements sont déformés avec un outil de formage (20) pour donner lieu à une structure porteuse définie d'entretoises (6) reliant des épaississements adjacents. La structure porteuse et les poils qui en font saillie sont ensuite noyés dans la matière plastique du support de poils (1), afin d'être ramenés à une longueur plus courte. L'invention concerne en outre un dispositif permettant de mettre un procédé de ce type en oeuvre, ainsi qu'une brosse obtenue à l'aide d'un tel procédé.

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