Precautions and control points for composite film slitting
Precautions during slitting
1. Control the cutting speed
When entering normal production, the speed of the composite film slitter should strictly follow the process requirements. Too high will also affect the cutting quality. Therefore, by controlling the slitting speed, the quality of the composite film required for slitting can be obtained. Because, in the production, some operators artificially increase the cutting speed in order to increase output and improve their own economic benefits. This will make the composite film prone to longitudinal stripes and staggered quality problems under high-speed operation.
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2. Choose the appropriate slitting process according to the equipment and the performance of the composite film
In normal production, it is necessary to use appropriate slitting technology for production according to equipment performance, intrinsic performance of the composite film and different film specifications. Because the process parameters, identification methods, and values ​​of various slit composite films are different, the process must be carefully adjusted for each product.
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3. Pay attention to the correct choice of work station
In production, the frequency of use of each station of the slitting machine is different, so the degree of wear is also different. Therefore, there will be a certain difference in performance. For example, for slitting products in better condition, there are fewer longitudinal stripes. Conversely, there are more longitudinal stripes. Therefore, each operator must pay attention to the correct selection of the station, give full play to the best condition of the equipment, grasp the on-site use situation, continuously sum up experience, and find the method of using the best characteristics of the equipment.
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4. Ensure the cleanliness of the composite film
In addition, it is also important to note that during the slitting process, each roll of composite film is reopened and re-rolled, which creates conditions for the entry of external foreign bodies, and because the film product itself is mainly used for food and pharmaceutical packaging Therefore, the sanitation requirements are very strict, so each film roll must be clean.
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Main points of slitting production control
1. The cutting material is in accordance with the process.
2. The release direction of the slit material roll material is consistent with the process sheet.
3. The position of the cutting knife of the divided product is in accordance with the requirements of the craft bill or sample.
4. The width of the slitting product is in accordance with the technological requirements.
5. The end face of the slitted roll is flush, without wrinkles and ribs.
6. Printing, compound quality (overprint, lack of printing, trailing, knife line, dirty ink, bubble (spot, grain) dots, wrinkles, lack of glue line, dirty type) are all eliminated.
7. The cut materials are hygienic, free of oil stains, paper scraps, and diaphragms.
8. The photoelectric detection object is selected correctly, the photoelectric detection head has high sensitivity, and the correction motor moves quickly.
9. The tension setting for unwinding and winding is appropriate, and there is no phenomenon of running and stretching or wrinkling.
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