DIAMOND KNIFE FOR MICROTOME AND MANUFACTURE THEREOF

• Main Author: KATO TOSHIRO
• Format: Patent
• Language: English
• Published: 09.07.1993
• Subjects: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING,CUTTING-OUT, STAMPING-OUT OR SEVERING; HAND CUTTING TOOLS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PERFORMING OPERATIONS; PHYSICS; SEVERING; TESTING; TRANSPORTING; WORKING CEMENT, CLAY, OR STONE; WORKING STONE OR STONE-LIKE MATERIALS

PURPOSE:To make a uniform cutting performance be exhibited for the front edge width of a cutting edge and to improve durability by forming a minute flat surface as a third cutting edge face between two main cutting edge faces constituting the cutting edge. CONSTITUTION:A thin-plate-shaped diamond obtained by cleaving is bonded to a metal holder with the orientation of a crystal set so that the direction is located at an edge, and then the holder to which this diamond is fixed is machined in respect to two flat surfaces by mechanical grinding so that it be shaped in a diamond knife having a cutting edge of 45 deg.. The machining of these two flat surfaces is stopped just in front of a place at which cutting edge lines intersect each other, being ended at a position at which a flat face which is a natural external face of a diamond plate is left with a minute flat surface formed uniformly in a width of 0.05mum at the cutting edge. By stopping the machining of the two flat surfaces with the flat face left behind, they are made to be smooth surfaces of a uniform height, to have a high abrasion resistance and to be firm and tough. In addition, breaking and chipping are prevented substantially and durability is improved.