Zipper Factory Tour
Shenzhen Adventure Day 1925 Jun 2015
The Zipper factory tour was courtesy of Daniel Liang. This was one of the more detailed tours; there’s a whole lot that goes into a zipper! Daniel’s factory is also super large as it is essentially end-to-end, raw materials go in such as bulk plastic and metal, and finished spools of zipper material and zips come out.
Filaments are used to make the plastic zipping ribs.
They start out as raw plastic pelts.
If a black color is desired, a small amount of dye pellets are added.
The pellets go into the hopper (far left) to be melted down/mixed and then extruded.
Unfortunately, I didn’t get great pictures of this part, but the filaments are pulled through, cooled, and then spooled.
Maybe this picture will help you, but I can’t really make sense of it.
Tapes are woven from some nylon/cotton thread. I’m not sure if this is made on site or not, but I think if I recall it is a separate factory.
The thread goes into weaving machines.
These machines knit in the filaments into a plastic zipper. This is either onto a woven tape, or standalone (both are pictured below).
A Zipper Slider starts out looking like this:
The metal is melted down and sent to die casting molds.
Then the pieces go through multiple polishing phases.
Lastly, some assembly of the flap and the zip.