What causes plastic-steel profiles to bend, and how can this issue be resolved?What causes plastic-steel profiles to bend, and how can this issue be resolved?

The main causes of bending are:
① Uneven thickness of the profile causes inconsistent shrinkage and deformation during cooling and shaping, resulting in unequal extrusion speeds on different surfaces and varying resistance in the shaping mold. 
② The pulling speed of the traction machine does not match the conveying speed of the bending machine; 
③ The metal liner itself is not straight, or during the bending process, the forces applied to each surface are uneven. 
④ The traction machine's tracks are not level, and excessive clamping force causes deformation of the metal liner and co-extruded profiles. 
The main solutions are: 
① Improve the uniformity of profile thickness; 
② Adjust the traction force of the tractor and the levelness of the tracks; 
③ Adjust the bending machine's rollers to balance the forces on all sides; 
④ Adjust the traction speed and conveying speed to make them synchronized.
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