Ban on upper and lower films
The ban on upper and lower sheets refers to the question that the front and back sides are not aligned when making the bag
1. Factors
The thickness of the composite film is uneven, with lotus leaf edges.
The tension of the double lifting roller is too small.
Some rollers do not rotate smoothly.
2. Solution
Check and adjust the relevant guide rollers (such as compensation rollers, offset rollers, etc.).
Adjust the tension of the double lifting roller.
The cover has spots and bubbles
Varieties and bubbles on the cover mean that the sealing surface is not flat
1. Factors
The heat-sealing knife or heat-sealing silicone pad is uneven.
When heat-sealing is performed on a material structure rich in hygroscopicity such as nylon film, air bubbles will occur when the hygroscopic film absorbs moisture.
Lack of heat sealing pressure.
Use one-component adhesives, such as neoprene adhesives, when heat sealing the bag. The hot cover can easily show uneven pits.
2. Solution
Replace the binder.
Check or adjust the heat sealing knife and heat sealing silicone pad.
Keep the raw materials and semi-finished products properly to prevent them from absorbing moisture.
Scale error
1. Factors
Operating factors, such as improper tension control, lack of pressure setting of the pressure cylinder of the film rubber roller, etc. Electric eye tracking is forbidden. The influence of plastic composite film bag processing speed. The bag length fixed-length system of the bag-making mechanism is too bad.
2. Solution
Decrease the bag making speed, and adjust the bag making speed slowly.
The pre-adjusted film feeding length (when adjusting the white bag) and the actual bag size should be as accurate as possible.
Check whether the compression degree of the compressed film ruler and the friction coefficient of the composite film are appropriate.
Adjust the pressure of the film rubber roller, the cylinder pressure and the tension of each part.
Check whether there is a cursor printing question or distance question, and adjust it.

Adjust the fixed-length system.