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How to adjust the tension of stretch film when winding?

Publish Time: 2024-06-12
When winding stretch film, the adjustment of tension is of great significance to ensure product quality and improve production efficiency. The following will elaborate on how to adjust the tension when winding stretch film:

1. The importance of tension adjustment

During the winding process of stretch film, the control of tension directly affects the flatness and winding tightness of the product. If the tension is too large, the stretch film may be stretched too much or even broken; if the tension is too small, the film roll may be loose and uneven. Therefore, reasonable adjustment of tension is the key to ensure product quality.

2. Tension adjustment method

Tension setting: Before winding the stretch film, it is necessary to set the appropriate winding tension according to the performance of the stretch film and the selected winding method. Usually, the tension adjustment range of the equipment is 100~600N, and the operator needs to set it according to the actual situation.

Adjust the tension attenuation value: As the winding diameter increases, if the core rotation speed remains unchanged, the winding tension of the stretch film will become larger and larger. In order to solve this problem, the tension of the stretch film can be automatically attenuated according to a certain rule according to the production speed and thickness of the stretch film. Usually, the tension value (tension attenuation) under different diameters should be pre-entered into the computer before winding. During the production process, the operator can adjust it at any time according to the winding situation of the stretch film.

Tension supplement: During the winding process of the stretch film, the tension may change due to various reasons. Therefore, a tension supplement device is required to achieve soft start and soft stop to prevent wrinkles in the winding stretch film.

3. Precautions for tension adjustment

When adjusting the tension, the following points should be noted: Choose the appropriate tension size according to the performance and thickness of the stretch film. When adjusting the tension attenuation value, the production speed and thickness of the stretch film should be fully considered. During the production process, the winding situation of the stretch film should be observed at any time and the tension should be adjusted in time.

Through the above methods, the tension of the stretch film during winding can be reasonably adjusted to ensure product quality and production efficiency.
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