When solving the problem of back-seal bubbles in roll bag making machine, you can start from the following aspects:
1. Adjust equipment parameters
Temperature adjustment:
The generation of back-seal bubbles may be related to improper temperature setting. It is necessary to ensure that the heat sealing temperature of the bag making machine is uniform and moderate, neither too high nor too low.
Too high temperature may cause excessive melting of the film and form bubbles; while too low temperature may make the heat seal not firm and easily generate bubbles.
Pressure adjustment:
Heat sealing pressure is one of the key factors affecting the quality of heat sealing. Insufficient or excessive pressure may cause bubbles.
The heat sealing pressure of the bag making machine can be adjusted to a suitable range to ensure that the film can fit tightly and avoid the formation of bubbles.
2. Check material quality
Film quality:
Check whether the film used has impurities, oil or moisture, which may affect the quality of heat sealing.
Ensure that the thickness of the film is uniform and meets the use requirements of the bag making machine.
Ink and adhesive:
If the film is printed with ink or adhesive is used, it is necessary to check whether its heat seal resistance is good.
Ink and adhesive may volatilize or decompose during the heat sealing process, generating gas and thus forming bubbles.
III. Optimize process flow
Cleaning equipment:
Regularly clean the heat sealing parts of the bag making machine, such as heat sealing knives, silicone rubber, etc., to remove impurities and oil stains attached to them.
Keeping the equipment clean helps ensure the stability of heat sealing quality.
Adjusting the feeding speed:
Feeding speed that is too fast or too slow may affect the heat sealing quality. It is necessary to adjust the feeding speed to the appropriate range according to the material and thickness of the film and the performance of the bag making machine.
IV. Other measures
Using auxiliary tools:
During the heat sealing process, you can pad the bottom plate with hot cloth or adjust the inclination of the sealing knife to improve the heat sealing effect and reduce the generation of bubbles.
Equipment maintenance:
Regularly maintain and service the bag making machine, such as checking the wear of the transmission parts and replacing damaged parts, to ensure the normal operation and stable performance of the equipment.
