Papermaking mold and fiber molded

Abstract

A papermaking mold 10 includes a mold main body 10 A having a wire part and a wire 108 disposed on the wire part. The wire part has a base surface 102, a columnar projection 106 lying sideways on the base surface 102, and at least two plate-like projections 105 at predetermined positions at a predetermined spacing in the longitudinal direction of the columnar projection 106. The facing inner sides 105 A of every adjacent two of the plate-like projections 105 are each formed of a part of a circular conical surface or a part of a hyperboloid.

1 . A papermaking mold comprising a mold main body having a wire part and a wire disposed on the wire part, the wire part having a base surface, a columnar projection having a longitudinal direction and lying sideways on the base surface, and at least two plate-like projections at predetermined positions at a predetermined spacing in the longitudinal direction of the columnar projection, the facing inner sides of every adjacent two of the plate-like projections being each formed of a part of a circular conical surface or a part of a hyperboloid. 
   
   
       2 . The papermaking mold according to  claim 1 , wherein the columnar projection has a semicircular cross-section perpendicular to the longitudinal direction thereof. 
   
   
       3 . The papermaking mold according to  claim 1 , wherein the circular conical surface or hyperboloid has a slope of 0.1 to 10 degrees. 
   
   
       4 . The papermaking mold according to  claim 1 , wherein the spacing between the facing inner sides is 1 to 50 mm. 
   
   
       5 . A fiber molded article having a flange, the fiber molded article comprising a base plate inclusive of the flange, a columnar projection having a longitudinal direction, and at least two plate-like projections at predetermined positions at a predetermined spacing in the longitudinal direction of the columnar projection, the facing inner sides of every adjacent two of the plate-like projections being each formed of a part of a circular conical surface or a part of a hyperboloid. 
   
   
       6 . The fiber molded article according to  claim 5 , wherein the columnar projection has a semicircular cross-section perpendicular to the longitudinal direction thereof. 
   
   
       7 . The fiber molded article according to  claim 5 , wherein the circular conical surface or hyperboloid has a slope of 0.1 to 10 degrees. 
   
   
       8 . The fiber molded article according to  claim 5  wherein the spacing between the facing inner sides is 1 to 50 mm. 
   
   
       9 . A casting mold part having a base surface and a cavity that is concave relative to the base surface and forms a molding surface to produce a casting having a plurality of plate-like parts at a predetermined spacing, wherein the cavity has a plurality of depressions for forming plate-like projections spaced face-to-face in a prescribed direction, the adjacent inner sides of every adjacent two of the depressions for forming plate-like projections being each formed of a part of a circular conical surface or a part of a hyperboloid. 
   
   
       10 . The casting mold part according to  claim 9 , wherein the cavity has a depression for forming a columnar projection extending as if to link the depressions for forming plate-like projections. 
   
   
       11 . The casting mold part according to  claim 9 , wherein the circular conical surface has a slope of 0.1 to 10 degrees. 
   
   
       12 . The casting mold part according to  claim 9 , wherein the spacing between the adjacent inner sides is 1 to 50 mm. 
   
   
       13 . The casting mold part according to  claim 9 , which comprises a fiber molded article. 
   
   
       14 . A casting mold assembly comprising a plurality of the casting mold parts according to  claim 9  with their base surfaces butted together. 
   
   
       15 . A drying and pressing mold comprising a male member and a female member which is used to produce the fiber molded article according to  claim 5 , the male and female members being configured to be butted together to form a clearance therebetween defining the outer contour of the fiber molded article to be produced. 
   
   
       16 . A male member constituting the drying and pressing mold according to  claim 15 , comprising a forming part comprising a base surface, a columnar projection having a longitudinal direction lying sideways on the base surface, and at least two plate-like projections at predetermined positions at a predetermined spacing in the longitudinal direction of the columnar projection, the facing inner sides of every adjacent two of the plate-like projections being each formed of a part of a circular conical surface or a part of a hyperboloid. 
   
   
       17 . A female member constituting the drying and pressing mold according to  claim 15 , comprising a concave forming part defining the contour of the fiber molded article to be produced, the concave molding part having at least two depressions corresponding to the plate-like projections of the fiber molded article at the predetermined positions at the predetermined spacing, the adjacent inner sides of every adjacent two of the depressions being each formed of a part of a circular conical surface or a part of a hyperboloid. 
   
   
       18 . A drying and pressing mold comprising a male member and a female member which is used to produce the casting mold part according to  claim 9 , the male and female members being configured to be butted together to form a clearance therebetween defining the outer contour of the casting mold part to be produced. 
   
   
       19 . A male member constituting the drying and pressing mold according to  claim 18 , comprising a forming part comprising a base surface, a columnar projection having a longitudinal direction lying sideways on the base surface, and at least two plate-like projections at the predetermined positions at the predetermined spacing in the longitudinal direction of the columnar projection, the facing inner sides of every adjacent two of the plate-like projections being each formed of a part of a circular conical surface or a part of a hyperboloid. 
   
   
       20 . A female member constituting the drying and pressing mold according to  claim 18 , comprising a concave forming part defining the contour of the casting mold part to be produced, the concave molding part having at least two depressions corresponding to the plate-like projections of the casting mold part at the predetermined positions at the predetermined spacing, the adjacent inner sides of every adjacent two of the depressions being each formed of a part of a circular conical surface or a part of a hyperboloid. 
   
   
       21 . A method of producing a fiber molded article comprising the steps of forming a wet fiber mat from a raw material slurry using the papermaking mold according to  claim 1 , transferring the wet fiber mat to the female, and press-forming the fiber mat between the female member and the male member. 
   
   
       22 . A method of producing a casting mold part comprising the steps of forming a wet fiber mat from a raw material slurry using the papermaking mold according to  claim 1 , transferring the wet fiber mat to the female member, and press-forming the fiber mat between the female member and the male member.