Manufacture of drive worm for sewing machine


Application Number: 00107610
Application Date: 2000.05.15
Publication Number: 1323669
Publication Date: 2001.11.28
Priority Information:
International: B22D17/22
Applicant(s) Name: Lai Yongfeng
Address:
Inventor(s) Name: Lai Yongfeng
Patent Agency Code: 11021
Patent Agent: tang baobeng
Abstract The making method of sewing machine driving shaft worm is as follows: place blank in the central position of pressure casting machine, and use a mould to press cast to form product, in which the mould is composed of at least three fan type modules the module possesses two smooth connecting surface, on one connecting surface is present with antercalation channel, and the othe connecting surface is present with an intercalation stripe, the modules are combined together, and a worm mould cavity is set at the central position. When press casting, the moulds punch extrude the blank synchronously to make the blank form worm shape after cut out the excess part, a worm can be obtained.