(1) The thickness of the sheet is uneven.
The production process conditions should be adjusted to control the thickness uniformity of the sheet. When thermoforming, it should be slow
heating.
(2) The sheet is heated unevenly.
Check the heater and shielding screen for damage.
(3) There is a large airflow in the production site.
The operating place should be shielded.
(4) Uneven distribution of compressed air.
An air distributor should be installed at the air inlet of the pre-stretching box to make the air blow evenly.
