... zippers in different shape through changing moulds,.3. This machine consists of a main extruder, mould forming, forming ... temperature, a dehydrating device, an air-drying device, a zipper sealing device, an automatic winding device, etc.4. ... flexible structure and easy to fix them to the machine.Characteristic:JL45B is an improved type of JL45A, ... and easy to fix them to the machine. zipper extruder