Home xin How to deal with the film pulling deviation of automatic packaging machine for facial tissue paper

How to deal with the film pulling deviation of automatic packaging machine for facial tissue paper

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1. Uneven tension

uneven tension of membrane roll usually shows that the inner layer of membrane roll is too tight and the outer layer is loose. If this kind of film roll is used on the automatic packaging machine, the operation of the packaging machine will be uncertain, resulting in uneven bag making size, film pulling offset, excessive edge sealing deviation and other phenomena, resulting in the packaging products not meeting the quality requirements. Therefore, the film roll products with such defects are often returned

the uneven tension of the film roll is mainly caused by the uneven tension between the incoming and outgoing rolls during slitting. At present, most film slitting machines have tension control devices, which can ensure the slitting quality of the film roll, but sometimes the uneven tension of the film roll will still occur due to many factors, such as operation reasons, equipment reasons, too large difference in the size and weight of the incoming and outgoing roll and so on. Therefore, it is necessary to carefully check and adjust the equipment to ensure that the slitting tension of the film roll is balanced

2. The end face is uneven

generally, the end face of the film roll is required to be smooth and uneven. If the concave convex exceeds 2mm, it will be judged as unqualified and will usually be rejected. The film roll with uneven end face will also cause unstable operation of automatic packaging machine, film pulling offset, excessive edge sealing deviation and so on

the main reasons for the uneven end face of the film roll are: unstable operation of the slitting equipment, uneven film thickness, unbalanced tension in and out of the roll, etc., which can be checked and adjusted accordingly

3. Wavy surface

wavy surface refers to the uneven bending and wavy surface of the membrane roll. This quality defect will also directly affect the operation performance of the film roll on the automatic packaging machine and the quality of the final packaging products, such as the tensile performance of packaging materials, poor sealing strength, printing patterns, deformation of formed bags, etc. If this quality defect is very obvious, such a film roll cannot be used on the automatic packaging machine

4. The slitting deviation is too large

generally, the slitting deviation of the film roll is required to be controlled within 2 ~ 3mm. Excessive slitting deviation will affect the overall effect of the formed bag, such as pattern position offset, incompleteness, formed bag asymmetry, etc

5. Poor joint quality

joint quality is generally the requirements for joint quantity, joint quality and joint marking

generally, the requirements for the number of membrane roll joints are: 90% of membrane roll joints are less than 1, and 10% of membrane roll joints are less than 2. When the roll diameter is greater than 900mm, the requirements for the number of joints are as follows: 90% of the roll joints are less than 3, and 10% of the roll joints can be 4 ~ 5

the film roll joint should be flat, smooth and firm without overlapping. The joint should preferably be located in the middle of the two patterns, and the adhesive tape should not be too thick, otherwise the film will be stuck, broken and cause shutdown, affecting the normal operation of the automatic packaging machine. Moreover, there shall be obvious marks at the joints for inspection, operation and treatment.

1. The end face is uneven. Generally, the end face of the film roll is required to be smooth and uneven. If the concave convex exceeds 2mm, it will be judged as unqualified and will usually be rejected. The film roll with uneven end face will also cause unstable operation of automatic packaging machine, film pulling offset, excessive edge sealing deviation and so on. The main reasons for the unevenness of the end face of the film roll are: unstable operation of the slitting equipment, uneven film thickness, unbalanced tension in and out of the roll, etc., which can be checked and adjusted accordingly
2. Wavy surface. Wavy surface means that the surface of the membrane roll is uneven and wavy. This quality defect will also directly affect the operation performance of the film roll on the automatic packaging machine and the quality of the final packaging products, such as the tensile performance of packaging materials, poor sealing strength, printing patterns, deformation of formed bags, etc. If this quality defect is very obvious, such a film roll cannot be used on the automatic packaging machine
3. The slitting deviation is too large. Generally, the slitting deviation of film roll is required to be controlled within 2 ~ 3mm. Excessive slitting deviation will affect the overall effect of the formed bag, such as pattern position offset, incompleteness, formed bag asymmetry, etc
the film roll joint should be flat, smooth and firm without overlapping. The joint should preferably be located in the middle of the two patterns, and the adhesive tape should not be too thick, otherwise the film will get stuck, break the film and cause shutdown, affecting the normal operation of the automatic packaging machine. Moreover, there shall be obvious marks at the joints for inspection, operation and treatment.

it is caused by the unequal axial distance between the two tensioning rollers of the film pulling. The adjustment method is: loosen the side offset to that side (pay attention to fine adjustment) and adjust it slowly and bit by bit.

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