Smoothing and/or lapping tool particularly for finishing stone materials

Abstract

The present invention relates to a finishing and/or polishing block-like tool of abrasive material, which includes at least one front working portion ( 2, 2 a ) and at least one rear portion designed to be anchored to a working head of a honing machine or a handle rear portion ( 3, 3 a ), the at least one front working portion ( 2, 2 a ) comprising: at least one first brushing working portion ( 4, 4 a ) including a plurality of bristle elements ( 5, 5 a ) each extending from the rear portion ( 3, 3 a ) through a length many times greater than the thickness thereof; and at least one second working portion ( 6, 6 a ) including depressions ( 7, 7 a ) separated by at least one raising zone ( 8, 8 a ) having size many times greater than the thickness of one bristle element.

1 . A finishing and/or polishing block-like tool of abrasive material, which includes at least one front working portion and at least one rear portion designed to be anchored to a working head of a honing machine or a handle rear portion, wherein said at least one front working portion comprises:
 at least one first brushing working portion including a plurality of bristle elements each extending from said rear portion through a length many times greater than the thickness thereof; and   at least one second working portion including depressions separated by at least one raising zone having size many times greater than the thickness of one bristle element.   
   
   
       2 . A tool as claimed in  claim 1 , wherein said at least one brushing working portion has a hardness that differs from that of said at least one second working portion. 
   
   
       3 . A tool as claimed in  claim 1 , wherein each first brushing working portion and each second working portion comprises bristle elements and reliefs, respectively, that extend to different levels. 
   
   
       4 . A tool as claimed in  claim 1 , wherein each first brushing working portion and each second working portion has bristle elements and reliefs, respectively, delimiting a substantially convex surface-working front. 
   
   
       5 . A tool as claimed in  claim 1 , wherein said at least one brushing working portion has a hardness ranging from 50 Shore A degrees to 30 Shore B degrees. 
   
   
       6 . A tool as claimed in  claim 1 , wherein said at least one second working portion has a hardness ranging from 50 Shore B degrees to 90 Shore B degrees. 
   
   
       7 . A tool as claimed in  claim 1 , wherein said at least one first brushing working portion and said at least one second working portion are made of different materials. 
   
   
       8 . A tool as claimed in  claim 1 , wherein said at least one first brushing working portion is made of a material selected from the group comprising thermoplastic resins, such as thermoplastic polyamides, thermoplastic polyesters, thermoplastic polyurethanes, casting resins, such as polyester polyols, casting polyester resins, casting epoxy resins, casting silicone resins, resins obtained through a vulcanization process, such as vulcanized rubbers. 
   
   
       9 . A tool as claimed in  claim 1 , wherein said at least one second working portion is made of a material selected from the group comprising:
 polyester, vinylester, epoxy resins, amine-hardener catalyzed epoxy resins and high-hardness polyurethane resins;   thermoplastic resins, such as polyphenylensulphide (PPS), polyamide (PA6, PA66, PA12), copolyamide (PAc), polysulphone (PSU), polyethersulfone (PESU), polyetheretherketone (PEEK); and   phenolic resins.   
   
   
       10 . A tool as claimed in  claim 8 , wherein said at least one first and/or second portion comprises at least one filler material in a percentage ranging from 40% to 60%, selected from the group comprising:
 calcium carbonates, kaolins, talc, glass fibres, carbon fibres, industrial diamond, corunda, zirconium oxides, tin oxides, aluminium oxides, and silica, tungsten, aluminium, titanium or boron carbides.   
   
   
       11 . A tool as claimed in  claim 9 , wherein said at least one first and/or second portion comprises at least one filler material in a percentage ranging from 40% to 60%, selected from the group comprising:
 calcium carbonates, kaolins, talc, glass fibres, carbon fibres, industrial diamond, corunda, zirconium oxides, tin oxides, aluminium oxides, and silica, tungsten, aluminium, titanium or boron carbides.   
   
   
       12 . A tool as claimed in  claim 1 , wherein said at least one second portion is made of a material having granule size one degree-lower than that of the material used to obtain said first portion.