Film blowing unit air compressor output of compressed air, air storage tank after tank outlet valve into the die head spiral mandrel center hole, die head is provided with a pressure adjusting valve, according to product size requirements for adjustment of the gas volume, pressure, gas through the center hole of the mandrel into bubble tubular center, blown extrusion plastic bubble film is in a shape of a tube. Buy machine and buy a car is the same reason, a sub penny goods, Dalian PE film blowing machine manufacturers that Oh, you want to make sure that their products and then choose a film blowing machine, film blowing machine produced by our company have many kinds, monolayer film blowing machine, three layer coextrusion film blowing machine. Don't believe the most expensive myth also don't believe the cheapest myth, choose a suitable own.