When the cloth pressing belt starts and stops, the thread will burn, and the effect of front and rear paste is obviously not as good as that of the middle or the gap between the cloth pressing belts. Causes: The pinch roller oscillates with the start and stop of the hot air chamber, and the oscillation is not synchronous, and the pinch roller micro-retreat control is not properly debugged. Troubleshooting: debug the equipment to ensure that the pinch roller starts synchronously with the swing of the hot air cavity, and the pinch roller stops synchronously with the swing of the hot air cavity, so that the pinch roller slightly reverses (that is, slightly retreats) after stopping, thus eliminating the above problems. Question 2: After the heat sealing tape is pressed, one side is well bonded and the other side is not well bonded. Reason 1: The position of the fabric skeleton is too high. Troubleshooting: Please press the upper pressure wheel, and then turn the lower pressure wheel of the hot air blower into a concave wheel or belt. Reason 2: the air volume is uneven due to the blockage of the hot air port. Elimination method: remove the debris blocking the hot air port or replace the hot air port. Reason 3: The pressure wheel is badly worn, and the fabric pressure belt is unevenly stressed. Elimination method: replace the pressure wheel. Question 3: Hot air pressure glue is good for straight bones, and white spots or discounts are available for round bones. Cause: Improper operation method. Elimination method: properly tighten the two sides of the cloth, and stick the circular and arc bone positions on the upper pressure belt of the lower pressure wheel. The application speed of arc and circular bone compression belt should be relatively slow. Question 4: There are several bone positions side by side on the fabric. After the hot air belt is placed for a period of time, white spots will appear or the waterproof value will decrease. Reason: Because there are many bone positions when the belt is pressed, after several times of belt pressing, the fabric coating can not stand repeated heating.