Method and machine for automatically fabricating zippers

Abstract

The present invention discloses a method and machine for automatically fabricating zippers. The method comprises steps: parallel placing two tapes on the machine, injection-molding a plurality of plastic teeth on two opposite edges of the tapes, leaving untoothed blank regions on the tapes periodically, and applying plastic films onto the tapes; transporting the filmed tapes to a punching device to punch a positioning hole on each blank region; inserting each section of the plastic teeth, which is between two adjacent blank regions, into at least one slider, and using the positioning holes as reference points to injection-mold a plurality of bayonets on the blank regions respectively, wherein each positioning hole corresponds to a set of bayonets; and cutting off the tapes at the blank regions to obtain a plurality of zippers.

What is claimed is: 
     
         1 . A machine for automatically fabricating zippers, comprising:
 a tooth sizing device injection-molding a plurality of plastic teeth respectively on two opposite edges of two tapes, which are parallel placed on said tooth sizing device, and leaving untoothed blank regions periodically on said tapes;   a plastic film applying device respectively applying plastic films onto said tapes;   a punching device punching a positioning hole on each said blank region of said tapes;   a tape inserting device inserting said tapes into at least one slider;   a bayonet injection-molding device injection-molding a plurality of bayonets on said blank regions, wherein each said positioning hole corresponds to a set of bayonets; and   an automatic cutting device cutting off said tapes at said blank regions to obtain a plurality of zippers.   
     
     
         2 . The machine for automatically fabricating zippers according to  claim 1 , wherein said tooth sizing device sets a distance between said plastic teeth before injection-molding said plastic teeth. 
     
     
         3 . The machine for automatically fabricating zippers according to  claim 1  further comprising a positioning device arranged between said tape inserting device and said bayonet injection-molding device and using said punching holes as reference points to determine positions of said bayonets.