Method and device for producing bristle products and bristle products
AssigneeGeka Brush GmbH
InventorGeorg Weihrauch
Life of this patent
Estimating the term…
Abstract
Brush ware comprising at least one carrier and bristles made from a moldable plastic material disposed thereon, is produced by providing the carrier with through holes acting like spinning nozzles, to which bristle-shaped molding channels join and a plastic melt for the bristles is injected from at least one side of the carrier—the feed side of the melt—through the holes into the channels thereby forming the bristles, wherein the through holes have a minimal width along at least a portion of their length which is ≦3 mm and the ratio between this width and the flow path of the melt resulting from the depth of the through holes plus the length of the channels is ≦1:5. A device for carrying out the method and brush ware produced in accordance with the method is also described.
Claims21
A brush ware comprising:
- a carrier having a plurality of through holes from which bristles extend;
- wherein at least one of the through holes has a minimal width of ≦3 mm along at least a portion of its depth;
- wherein each of said bristles are formed from a thermoplastic material and have a maximum width transverse to a longitudinal axis thereof of ≦3 mm;
- wherein a ratio R between said transverse width and a bristle length is ≦1:5,
- wherein said at least one of said through holes has an insertion funnel, a cylindrical hollow guiding path and a transition zone, all of which communicate with a plurality of cylindrical hollow smoothing paths extending down through said through hole, the number of smoothing paths corresponding to a number of bristles of a bundle of said bristles each of which extend out and down from said through hole and a respective smoothing path,
- wherein the longitudinal length of each of the plurality of smoothing paths is parallel to the axis of the through hole, and wherein, the upper diameter of the guiding path, the transition zone, and each of the plurality of smoothing paths progressively decrease relative to that of the insertion funnel, and
- wherein, the upper diameter of the guiding path, the transition zone and each of the plurality of smoothing paths progressively decrease relative to that of the insertion funnel.
Dependencies are inferred from the claim text.