METAL CHUNK FOR IMPACT PRESSING, METHOD FOR MANUFACTURING METAL CHUNK FOR IMPACT PRESSING, METAL CYLINDRICAL BODY, METHOD FOR MANUFACTURING METAL CYLINDRICAL BODY, CONDUCTIVE SUBSTRATE FOR ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE AND IMAGE FORMATION DEVICE

• Main Authors: TAMEMASA HIROSHI, SHINGU KENTA, HARUYAMA DAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 28.06.2018
• Subjects: ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; FORGE FURNACES; FORGING; GRINDING; HAMMERING; HOLOGRAPHY; MAGNETOGRAPHY; MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; POLISHING; PRESSING METAL; PUNCHING METAL; RIVETING; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

PROBLEM TO BE SOLVED: To provide a metal chunk for impact pressing, with which a metal cylindrical body in which deviation in thickness (deviated thickness) caused by impact pressing is inhibited can be acquired.SOLUTION: In a metal chunk for impact pressing, maximum height roughness Rz of a male mold contact face with which a male mold of the male mold and female mold that are used for impact pressing comes into contact is 20 μm or more and 50 μm or less, and an average length RSm of a roughness curve element of the male mold contact face is 150 μm or more and 400 μm or less.SELECTED DRAWING: Figure 1 【課題】インパクトプレス加工による厚みの偏り（偏肉）が抑制された金属筒状体が得られるインパクトプレス加工用金属塊を提供すること。【解決手段】インパクトプレス加工で使用する雄型及び雌型のうち、前記雄型が接触する雄型接触面の最大高さ粗さＲｚが２０μｍ以上５０μｍ以下であり、前記雄型接触面の粗さ曲線要素の平均長さＲＳｍが１５０μｍ以上４００μｍ以下であるインパクトプレス加工用の金属塊。【選択図】図１