A method for manufacturing an ultra-hard and wear-resistant composite blade, comprising the following steps: carrying out pre-blank-fabricating and pre-matrix-forming treatments on a blade matrix (2) material to form a preformed blank; adding an ultra-hard alloy material in the preformed blank by means of an ultra-high-temperature melting treatment; after cooling, machining and grinding according to the blade specifications to obtain the ultra-hard, wear-resistant and antirust composite blade. The composite blade manufactured using the method has ultra-high hardness, wear resistance and blank antirust performance; moreover, the cutting edge of the nanoscale ultra-hard alloy body is durable and sharp and is not liable to wear.

The present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacturing. More specifically, the present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacture which limit user exposure to associated cutting edges.

The present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacturing. More specifically, the present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacture which limit user exposure to associated cutting edges.

Method for enhancing sharpness of a cutting tool. A blade portion is cold forged by applying a force to a first side of the blade portion using a form tool projection to form a notch such that a portion of the metal material from the first side of the blade is work hardened and plastically deformed to extend through a plane along which the second side extends. A secondary grinding operation is applied to the second side of the blade portion to remove the portion of the metal material that extends beyond the plane along which the second side extends and sharpen a cutting edge extending between the first and second sides. The form tool projection is a radially extending projection of a rotatable knurl roller which rotates to form a sequence of spaced apart cold forged notches along the cutting edge.

An assembly and method of forming a press cutting die that includes a cutting blade that is supported by a blade support assembly or blade support. The blade support includes a first base portion and a second base portion that are each contoured to cooperate with one another to capture a portion of the cutting blade along an interface between the first and second base portions. Preferably, one or more keys extend between the first and second base portions and traverse the geometric plane associated with the cutting blade. Such a press cutting die is particularly applicable for cutting biologically compatible materials having a desired shape from a bulk source of the biologically compatible material.

Disclosed herein is a method of manufacturing a cutting member that has a first portion for supporting, a second portion for forming a cutting edge, and a third portion connecting the first and second portion; the method includes: providing a first metal material used for forming the first portion; providing a second metal material used for forming the second portion; welding the first and second metal material with high energy density beam to form the third portion at the welding site; performing heat treatment on a cutting member blank obtained after welding. Also disclosed is a cutting member, the first portion of a first metal material; the second portion of a second metal material; after welding, the metallographic structure of the third portion and its nearby metallographic structure are substantially free of holes. The body of the manufactured cutting member has good toughness, the cutting edge has high hardness, and the body and cutting edge are not easily broken and have long service life.

The knife blade has a side portion proximate the cutting edge which includes a series of adjacent lengthwise corrugations. Each corrugation includes an inclined surface with an edge which extends outwardly beyond the inclined surface of the adjacent corrugation forming a ridge along the corrugation. Food, as it is sliced by the blade, moves across the inclined surface and over the ridge of each corrugation, to release the vacuum formed between the food and the blade, reducing the tendency of the food to stick to the blade. The knife is formed by forming a blade blank with corrugations on one side and metal strips on the opposite side. The metal strips are ground off the opposite side and the corrugated side proximate the edge is lightly ground to form a chisel edge. The blank may be formed by casting 3D printing, forging, extrusion, pressing or another additive manufacturing process.

A blade element (11) for a refiner (10) for refining fibrous material has a blade element body (12) and blade bars (13, 13a, 13b) and blade grooves (14, 14a, 14b) therebetween. Bottoms of the blade grooves (14, 14a, 14b) have, in the longitudinal direction (LD) of the blade grooves, a variable depth profile comprising alternating high points (14a, 14b) and low points (14a, 14b) so that there is a phase shift (X2) between the high points (14a, 14b) and the low points (14a, 14b) of the variable depth profiles of the bottoms of the adjacent blade grooves (14a, 14b). Also, a refiner (10) for refining fibrous material and a method for manufacturing the blade element (11) for the refiner (1).

A blade element (11) for a refiner (10) for refining fibrous material has a blade element body (12) and blade bars (13, 13a, 13b) and blade grooves (14, 14a, 14b) therebetween. Bottoms of the blade grooves (14, 14a, 14b) have, in the longitudinal direction (LD) of the blade grooves, a variable depth profile comprising alternating high points (14a, 14b) and low points (14a, 14b) so that there is a phase shift (X2) between the high points (14a, 14b) and the low points (14a, 14b) of the variable depth profiles of the bottoms of the adjacent blade grooves (14a, 14b). Also, a refiner (10) for refining fibrous material and a method for manufacturing the blade element (11) for the refiner (1).

This application relates to a method of manufacturing a knife using a multilayer material. In one aspect, the method includes preparing a multilayer material for manufacturing a knife, and heating and then forging the multilayer material to form a knife-shaped structure including a blade part and a handle part. The method also includes grinding the blade part to form a sharpened knife-edge and applying mud, including kaolin and white clay, to an entire surface of the knife-shaped structure and removing the mud applied to the blade part. The method further includes heating the knife-shaped structure applied with the mud, and quenching the heated knife-shaped structure through oil-cooling. The method further includes etching a surface of the quenched knife-shaped structure to form a pattern on the surface and grinding the surface-etched knife-shaped structure to form a knife having a final shape.