During the blowing process, uneven wall thickness of PET bottles appeared.
The cause of the problem:
1. The position of the drawing rod is not in the center of the embryonic tube.
2, the blow hole is asymmetrical, the aperture is different.
3, the tensile ratio is too low or the blowing proportion is too small.
4. The embryo tube does not rotate in the heating furnace.
5. Uneven wall thickness or injection density of embryonic tube.
Quick solution:
1. Adjust the position of the drawing rod.
2. Adjust the position and aperture of the blow hole.
3, increase the tensile ratio or blowing proportion.
4. Check the rotation device.
5. Improve the quality of embryonic tube.
Keywords.:blow molding machine, stretch blow molding technology,ZQ Blow Molding Machine