Grinding Disc Device for a Grinding Apparatus

Abstract

A grinding disc device for a grinding apparatus is described, having at least one grinding layer and a carrier disc fixedly connected to the grinding layer. The grinding layer has at least one connection surface (FV) connected to the carrier disc and forms an abrasive grinding surface (FS) lying opposite the connection surface (FV) and facing away from the carrier disc. The carrier disc made of a plastic material is produced by injection molding and is connected immediately and directly to the connection surface (FV) of the grinding layer, wherein the plastic material of the carrier disc is sprayed by injection molding immediately and directly onto the connection surface (FV) of the grinding layer, such that the carrier disc and the grinding layer are connected to one another in a material-locking manner.

What is claimed is: 
     
         1 . A grinding disc device for a grinding apparatus comprising: at least one grinding layer and a carrier disc fixedly connected to the grinding layer, wherein the grinding layer comprises a connection surface (F V ) connected to the carrier disc and forms an abrasive grinding surface (F S ) lying opposite the connection surface (F V ) and facing away from the carrier disc, wherein the carrier disc is made of a plastic material produced by injection molding and is connected immediately and directly to the connection surface (F V ) of the grinding layer, wherein the plastic material of the carrier disc is sprayed by means of injection molding immediately and directly onto the connection surface (F V ) of the grinding layer, such that the carrier disc and the grinding layer are connected to one another in a materially-bonded manner. 
     
     
         2 . The grinding disc device according to  claim 1 , wherein the grinding layer consists essentially of a flat, circular grinding disc or a sanding disc. 
     
     
         3 . The grinding disc device according to  claim 1 , wherein the grinding layer is formed by a fiber disc or a vulcanised fiber disc. 
     
     
         4 . The grinding disc device according to  claim 1 , wherein the grinding layer is composed of grinding lamellas. 
     
     
         5 . The grinding disc device according to  claim 1 , wherein the connection surface (F V ) and the grinding surface (F S ) lying opposite the connection surface (F V ) are each constituted as essentially continuous, annular surfaces. 
     
     
         6 . The grinding disc device according to  claim 1 , wherein the grinding surface (F S ) is formed by a ceramic grain abrasive medium scattered on a carrier material. 
     
     
         7 . The grinding disc device according to any  claim 1 , wherein the grinding surface (F S ) of the grinding layer connected to the carrier disc is constituted dish-shaped. 
     
     
         8 . The grinding disc device according to  claim 1 , wherein cooling air slots are formed in the carrier disc distributed over a periphery of the carrier disc for passage of cooling air. 
     
     
         9 . The grinding disc device according to  claim 1 , wherein the carrier disc is constituted in one piece with a hub part, wherein ventilation ribs extend radially outwards from the hub part. 
     
     
         10 . The grinding disc device according to  claim 9 , wherein the hub part comprises an inner thread for the fastening of the grinding disc device on a drive shaft of the grinding apparatus. 
     
     
         11 . The grinding disc device according to  claim 9 , wherein cooling air passage slots are also formed into the hub part. 
     
     
         12 . The grinding disc device according to  claim 1 , wherein the carrier disc is produced from a thermoplastic polymer. 
     
     
         13 . The grinding disc device according to  claim 12 , wherein the carrier disc is made from a thermoplastic terpolymeror an acrylnitrile-butadiene-styrene copolymer (ABS). 
     
     
         14 . The grinding disc device according to  claim 12 , wherein the carrier disc is made from a polyamide PA6 or a glass fiber-reinforced polyamide PA6. 
     
     
         15 . A method for producing a grinding disc device for a grinding apparatus by injection molding, comprising the steps of:
 introducing a grinding layer with a connection surface (F V ) and an opposite abrasive grinding surface (F S ) into a molding tool of an injection molding machine, in such a way that the connection surface (F V ) of the grinding layer points in a direction of a predefined cavity of the molding tool,   forming a carrier disc connection to the grinding layer by injecting a plastic material suitable for producing the carrier disc into a closed molding tool at a predefined temperature and under a predefined pressure, such that the plastic material of the carrier disc is sprayed immediately and directly onto the connection surface (F V ) of the grinding layer thereby producing the grinding disc device.   
     
     
         16 . The method according to  claim 15 , wherein the carrier disc is constituted in one piece with a hub part and/or that slots distributed over the periphery of the carrier disc are formed for a passage of cooling air. 
     
     
         17 . The method according to  claim 16 , wherein an inner thread is formed in the hub part for the fastening of the grinding disc device on a drive shaft of the grinding apparatus and/or that the hub part is formed with corresponding cooling air passage slots. 
     
     
         18 . The method according to any one of  claim 15 , wherein a flat, circular vulcanised fiber disc with a scattered ceramic grain abrasive medium is used as a grinding layer and that a glass fiber-reinforced polyamide PA6 is the plastic material for the carrier disc sprayed onto the grinding layer.