The die is covered from top to bottom. That is to loosen the screw when it is thick. This is called a forward-adjusting die head. If there is a big mouth below and the top die is put in, it is to loosen the thin side and tighten the thick side. This is called reverse adjustment.
There are four or six adjusting bolts in the die head, which are usually hexagonal. At the upper edge of the die, they can be adjusted. As for the tightness or looseness, different moulds from different origins are different, it is necessary to know after operation. Cleaning method for mold head of blown film machine. Clean the head and spirochete, use paraffin or methyl silicone oil to smear when cleaning, and then gently wipe the paste with 1000 mesh sandpaper until clean.
The temperature of ABA film blower is adjusted according to the material property (there is difference between the return temperature and the pure material temperature) and the extrusion quantity is increased after changing the screen. The key is to add a little methyl silicone oil to the hopper every week in the production process, which can lubricate the screw die and also play a role in clearing the mould.