If the film blowing machine die head does not discharge material, it is generally because the raw material cannot descend from the feed port. Several reasons can cause this issue:
The feed port temperature is too high, causing the raw material to start plasticizing before entering the barrel. The plasticized raw material sticks to the screw groove at the feed port, blocking the channel (commonly known as holding the rod). To resolve this, stop the machine, clean the barrel screw, and lower the feed port temperature before restarting the machine.
The feed port of the barrel screw is severely worn, resulting in the raw material only rolling at the feed port without the power to push forward. In this case, the barrel screw needs to be replaced.
The die head temperature is too low, causing the material to harden and block the extrusion flow channel. This phenomenon should be avoided as much as possible, as it can lead to major accidents such as tee cracking and screw breaking.
