Honeycomb forming ferrule and jig for honeycomb forming ferrule using the ferrule

Abstract

There is disclosed a die ( 10 ) for forming a honeycomb body having a structure provided with groovy slits ( 2 ) on a front face thereof, the slits being formed by cell blocks ( 3 ) and back holes ( 4 ) on a back surface thereof, each hole being communicatively connected with the slit. The die ( 10 ) is made of cemented carbide having wear resistance. The cemented carbide is formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness. A connection area ratio of the back hole ( 4 ) and the cell block ( 3 ) is 35 to 65%. According to the die for forming a honeycomb body and the die jig for forming a honeycomb body using the same, wear resistance of the die or the die jig can be enhanced when the raw material containing the material having very high hardness such as SiC and the like is extruded as well as the defect in shape of an extruded body due to wear of the die can be overcome.

1 - 8 . (canceled)  
   
   
       9 . A die for forming a honeycomb body, the die comprising a plate having a predetermined size and provided with: 
 a plurality of cell blocks defined by a plurality of groovy slits on a front face thereof; and    a plurality of back holes on a back face thereof, each hole being communicatively connected with a predetermined slit,    wherein the plate is made of a cemented carbide material having wear resistance, the cemented carbide material being formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness, a connection area ratio of the back hole and the cell block being 35 to 65% of the surface area of the plate.    
   
   
       10 . A die for forming a honeycomb body according to  claim 9 , wherein a height of the die is 2 to 5 mm.  
   
   
       11 . A jig for forming a honeycomb body, the jig comprising: 
 a die for forming a honeycomb body, the die comprising a plate having a predetermined size and provided with a plurality of cell blocks defined by a plurality of groovy slits on a front face side thereof and a plurality of back holes on a back face thereof, each hole being communicatively connected with the slit,    a holding plate fixing a profile and size of the honeycomb body extruded from the die for forming the honeycomb body; and    a back holding plate controlling an amount of kneaded clay flowing into the back holes uniformly,    wherein the die and the holding plate are made of a cemented carbide material obtained by being sintered at high temperature.    
   
   
       12 . A jig for forming a honeycomb body according to  claim 11 , wherein the back holding plate is made of cemented carbide having wear resistance.  
   
   
       13 . A jig for forming a honeycomb body according to  claim 11 , wherein only the portions, which are in contact with the kneaded clay, of the holding plate and the back holding plate are made of cemented carbide having wear resistance.  
   
   
       14 . A jig for forming a honeycomb body according to  claim 11 , wherein the cemented carbide alloy is formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness.  
   
   
       15 . A jig for forming a honeycomb body according to  claim 12 , wherein the cemented carbide alloy is formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness.  
   
   
       16 . A jig for forming a honeycomb body according to  claim 13 , wherein the cemented carbide alloy is formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness.  
   
   
       17 . A jig for forming a honeycomb body according to  claim 11 , wherein the connection area ratio of the back hole and the cell block is 35 to 65% of a surface area of the plate.  
   
   
       18 . A jig for forming a honeycomb body according to  claim 11 , wherein a height of the slits defining the cell blocks is 2 to 5 mm.