Title: Penknife spiral knife production method and its complete mould
Application Number: 200610081535 Application Date: 2006.05.26
Publication Number: 1850425 Publication Date: 2006.10.25
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: B23P15/28,B21C25/02,B21C26/00,B23H9/00
Applicant(s) Name: Xue Song Address: 100086
Inventor(s) Name:
Attorney & Agent:
Abstract:
     The invention is about the process of the screw knife of a pencil sharpener and its mould. The process includes: A. drawing high-carbon tool round-steel, B. blanking material on punching machine, C. softening treatment by high temperature spheroidization, D. butt beveling, E. wearing the periphery refinely, F. surface parkering and G. producing the product by the cold-extruded module. The process of the cold-extruded is to make the copper electrode same as the screwing knife then to module the hard alloy mould by the copper electrode and chamfer, grind and polish the hard alloy. Advantages: one-time moulding, low cost, high efficient, simple structure and long life.
Time: 14