Household brush or body care brush comprising injected bristles, and injection mold for manufacture thereof

Abstract

The household or body care brush has a handle and a bristle arrangement supported thereby. The bristle support and the bristles formed integrally therewith are produced in an injection moulding process. A plurality of injected bristles are arranged in each case such that they stand closely adjacent to one another in a bristle bundle. The bristle bundles on the other hand are arranged with a space between the bundles. The invention further relates to an injection mould that is particularly suited to producing household brushes or body care brushes comprising bristle bundles, the longitudinal directions of which run at an angle to one another or are out of square with one another.

1 . A domestic brush or body care brush with a handle and a bristle field which is carried by said handle, said bristle field having injected bristles which are produced using the injection molding method and project from a bristle carrier which is realized integrally with them, wherein each case several injected bristles are arranged in a bristle bundle and the bristle bundles are arranged spaced apart from one another at a distance. 
     
     
         2 . The domestic brush or body care brush as claimed in  claim 1 , wherein the injected bristles in the bristle bundle, measured upon exit out of the bristle carrier, are arranged at a mutual distance of between 0 mm and 1.5 mm, in a preferred manner between 0 mm and 0.8 mm. 
     
     
         3 . The domestic brush or body care brush as claimed in  claim 1 , wherein a bristle carrier which is common to at least some of the bristle bundles. 
     
     
         4 . The domestic brush or body care brush as claimed in  claim 3 , wherein the common bristle carrier is formed by the handle and the handle as well as the injected bristles consist of the same plastics material. 
     
     
         5 . The domestic brush or body care brush as claimed in  claim 3 , wherein the common bristle carrier and the handle are injected together. 
     
     
         6 . The domestic brush or body care brush as claimed in  claim 5 , wherein the handle comprises a head region and a handle region. 
     
     
         7 . The domestic brush or body care brush as claimed in  claim 6 , wherein the handle comprises at least one passage in the head region and the common bristle carrier extends, in the direction of the passage, on both sides of the head region, as well as comprises a connecting web which extends through the passage. 
     
     
         8 . The domestic brush or body care brush as claimed in  claim 3 , wherein the handle comprises a head region and a handle region. 
     
     
         9 . The domestic brush or body care brush as claimed in  claim 8 , wherein the common bristle carrier is realized in a sleeve-shaped manner and is fitted onto the head region. 
     
     
         10 . The domestic brush or body care brush as claimed in  claim 1 , wherein at least some of the bristle bundles comprise an individual bristle carrier and the individual bristle carriers are held by the plastics material of the handle. 
     
     
         11 . The domestic brush or body care brush as claimed in  claim 1 , wherein the injected bristles upon exit out of the bristle carrier have a diameter between 0.4 mm and 1.2 mm. 
     
     
         12 . The domestic brush or body care brush as claimed in  claim 1 , wherein the injected bristles have a free length of between 12 mm and 25 mm. 
     
     
         13 . The domestic brush or body care brush as claimed in  claim 1 , wherein the injected bristles comprise a bristle stem which extends from the bristle carrier up to the free end of the injected bristle, or, if said bristles comprise an end cap, up to the end cap, and the bristle stem, on its end remote from the bristle carrier, has a diameter between 0.2 mm and 0.6 mm. 
     
     
         14 . The domestic brush or body care brush as claimed in  claim 13 , wherein the injected bristles comprise end caps, the outside contour of which connects continuously to the outside contour of the bristle stem and which are realized in a rounded manner. 
     
     
         15 . The domestic brush or body care brush as claimed in  claim 1 , wherein the bristle bundles comprise between 10 and 35. 
     
     
         16 . The domestic brush or body care brush as claimed in  claim 1 , wherein the distance between bristles is between 1 and 10 mm. 
     
     
         17 . An injection mold for producing a domestic brush or a body care brush as claimed in  claim 1 , said injection mold having several mold parts which—in the closed state of the injection mold—form a cavity for the injection molding of the injected bristles and of at least the bristle carrier, wherein at least one of said mold parts comprises a receiving body which defines the cavity together with the remaining mold parts and a support body which is movable relative to said receiving body, and the receiving body is provided with passages in which, per relevant bristle to be injected, a mold insert is displaceably mounted with the bristle cavities for producing the injected bristles of the relevant bristle bundle, in the closed position of the injection mold the support body supports the receiving body and the mold inserts and when the injection mold is opened in one opening step the support body is raised from the receiving body which remains in its closed position and—for removing the injected bristles from the mold in part—at the same time the mold inserts together with the support body are moved outward relative to the receiving body in the direction of the interior of the cavity and in a following further opening step, the receiving body together with the support body and the mold inserts are moved into the open position. 
     
     
         18 . The injection mold as claimed in  claim 17 , wherein the relevant mold inserts are pre-biased in the direction of the support body by means of a spring. 
     
     
         19 . The injection mold as claimed in  claim 18 , wherein at least two of the relevant mold inserts are arranged non-parallel to one another (in a skew manner or at an angle with respect to one another). 
     
     
         20 . The injection mold as claimed in  claim 17 , wherein at least two mold parts which comprise one receiving body with mold inserts and one support body each, wherein the directions of movement of said mold parts extend at an angle with respect to one another when closing and opening the injection mold.