Reasons, countermeasures and effects of BOPP film slitting quality ---
Another reason for the burrs is the quality of the parent roll.
First, when the mother roll product is wrinkled, the burr phenomenon is likely to occur when the film is cut to the sipe roll and the film is not effectively flattened;
Second, when the film is thick or thin for a long time, the film is prone to burr phenomenon when the film is not attached to the sipe, especially in the triangular position of the thickness. In addition, since the thinner the film, the lower the stiffness, and the higher the chance of burrs.
Slitting machine operation guide ---
6 Safety Precautions
6.1 The operator must be trained to work and wear the labor protection products correctly; carefully check the protective devices, safety interlocks, test buttons, emergency buttons, etc. of the machine before starting the machine, and confirm that the machine can be turned on after normal operation.
6.2 The slitting machine is a double-operated equipment. It is forbidden to operate in tandem, especially when the equipment is repaired.
6.3 The cut products should be stacked neatly and securely, and fixed with a cannula to prevent the product from slipping and hurting people.
6.4 When working, it is not allowed to place any irrelevant items such as oil pots and tools on the workbench.
6.5 During the operation of the machine, it is strictly forbidden to reach into the circumference of the slitting knife or the pressure roller. Even if the vehicle has been stopped but the power is not disconnected, it is forbidden to perform the tool change, paper adjustment and adjustment under the knife.
6.6 Slitting blades must be protected during handling and storage, and must not be handled or stored with bare edges.
6.7 The interlocking protection devices of all parts of the equipment shall not be short-circuited or removed, and if malfunction or abnormality occurs, stop immediately and report to the machine for repair and maintenance.
6.8 Machine personnel shall not perform fault repair or equipment adjustment of fault type, and the power distribution cabinet, switch box, etc. shall not be opened without authorization, and shall not store items.
6.9 When handing over the shift, you must hand over the site, and you must explain the production and equipment operation of the class to the next one.
6.10 Check the surrounding conditions before leaving work, and cut off the power and air supply of the machine and related equipment.
Slitting machine parts ---
2. Attenuation and tension compensation of the tension of the rewinding and unwinding: It is generally believed that maintaining the constant tension of the aluminum foil during the rewinding and unwinding of the aluminum foil is beneficial to the apparent quality of the finished aluminum foil, but it is not. The best method is to increase the tension of the aluminum foil according to a certain rule as the diameter of the coil increases, and the smaller the diameter, the lower the tension value. There are automatic tension control and manual tension control during the slitting operation. The automatic tension control system is the leading set tension attenuation value, which is maintained throughout the winding process. The manual tension control requires the operator to continuously adjust the diameter of the master roll to meet the tension required for the aluminum foil during operation. When setting the automatic tension operation, set the initial tension before setting the tension attenuation value. Taking the setting of the slitting and unwinding attenuation value as an example, the setting principle is that the aluminum foil tension attenuation value (%) is equal to the tension at the end of winding of the aluminum foil minus the initial tension and then divided by the initial tension. Multiply by 100%. When setting the automatic tension value of the unwinding, it should not be too large, otherwise the aluminum foil winding surface has a large hardness and is prone to warping. But the tension should not be too small, too small and easy to cause the rewinding body to be too loose, and the winding is not neatly running. Therefore, the quality of the rewinding and unwinding during the aluminum foil slitting operation is mainly affected by the change of the tension of the aluminum foil. It can be seen that the mastery of the retracting and unwinding control system is the key to affecting the quality.
3. The change of speed during slitting affects the change of tension: When the speed is increased or decelerated, the speed of the main motor changes. Firstly, it causes the instantaneous change of the tension of the unwinding traction to the winding section of the aluminum foil, and it is necessary to slightly vibrate the aluminum foil after a period of time to gradually stabilize the tension. The instability of this tension is manifested in the fact that the finished roll is not well-wound, and the end face has unevenness, which affects the quality of the product.
Zhengzhou EAST IMPORT AND EXPORT co., ltd . ( a goulian group of company) a manufacturer and exporter for all kind of packaging machinery , like bopp tape coating machines, bopp tape slitting machines. Bopp tape core cutter, bopp tape core loader etc