The screw of the film blowing machine is a key component in the plastic film manufacturing process, and its criticality is obvious. The film blowing machine is a mechanical device that uses compressed air to drive the rotational motion to convey materials, and plays an important role in the entire plastic film forming process. The main responsibility of this equipment is to ensure that the molten plastic raw material is evenly transferred to the mold head and a continuous film is generated through a fine extrusion process. The screw is the core part of the plastic processing equipment and one of the most easily damaged parts. However, with the extension of the production cycle, the wear of the screw is inevitable, which not only reduces the efficiency of production, but also may have a far-reaching impact on the quality of the film. In actual production, many companies often only pay attention to whether the screw is damaged or how to deal with it, but ignore other issues, such as maintenance. Therefore, the purpose of this article is to study the countermeasures that should be taken in the case of severe wear of the screw of the film blowing machine, so as to assist enterprises in improving their production efficiency and product quality level.
The specific impact of screw wear on the production of film blowing machines
1. Due to the wear of the screw, the extrusion pressure will be reduced, which will further have a negative impact on the speed of production. Therefore, the wear must be repaired. In addition, a worn screw will increase energy consumption because it requires more energy to overcome friction resistance.
2. Regarding the quality of the film: The wear of the screw may affect its original extrusion properties, thereby adversely affecting the thickness, transparency and uniformity of the film. Since the film undergoes a certain degree of deformation during the molding process, it is easy to cause deformation during subsequent processing, which may reduce the quality of the final product or cause defects. This situation may cause the product to fail to meet customer expectations and may even lead to returns or complaints.
3. With the severe wear of the screw, we need to replace it with a new screw, which will undoubtedly increase the maintenance cost of the equipment. If the screw fails, it may cause the entire unit to stop operating, causing economic losses. In addition, frequent equipment shutdowns and maintenance activities may also have an adverse effect on the progress and plan of production.
How to detect the degree of wear of the film blowing machine screw
1. Use special measuring tools, such as vernier calipers and microscopes, to measure the key dimensions of the screw, such as diameter and pitch, to assess the degree of wear.
2. During production activities, pay close attention to abnormal conditions such as noise and vibration that may occur during the operation of the screw. If there is sound and vibration, it means that the screw has a problem. The wear of the screw may be indicated by these phenomena.
3. Regular maintenance and inspection: We have established a regular maintenance inspection process to periodically inspect and document the screw. Replace the screw regularly. By analyzing and comparing data from different time periods, we can promptly identify the development trend and existing problems of screw wear.
Preventive measures for screw wear of film blowing machine
1. In order to extend the service life of the screw, we selected high-quality screw materials with wear and corrosion resistance for manufacturing.
2. In order to reduce the wear of the screw, we need to make appropriate adjustments to key parameters such as the screw speed and temperature according to the actual needs of production. In order to prevent the screw from suffering excessive wear due to excessive speed and temperature.
3. Clean the screw regularly: Regularly remove the residue on the screw to ensure that the screw surface is always clean. Use lubricants frequently to ensure that it is not damaged during operation. This helps reduce friction and wear between the screw and the material.
4. Choose the right lubricant: Choosing the right lubricant can reduce friction and wear between the screw and the material. The lubricant must have good lubrication properties and not produce precipitation, decomposition and deterioration at a certain temperature. When choosing a lubricant, the type of material and the material properties of the screw should be taken into consideration.
Repair plan for severe screw wear
1. Before repairing, it is necessary to thoroughly remove impurities and residues in the wear area. If it is not cleaned in time, it will affect the lubrication and cooling of the engine parts, and even cause premature damage to the parts, reducing their use value. Doing so will help ensure the effectiveness of the repair work and extend the service life after the repair is completed.
2. When choosing a repair technology, the most suitable repair method should be selected based on the severity of wear and the material of the screw. For parts with more severe wear, electroplating or shot peening can be used for surface strengthening treatment, and laser cladding technology can be used for materials with poor wear resistance to increase their service life. Common repair methods include welding and thermal spraying. For damage with greater wear or a certain depth, thermal spraying can be used for repair. Welding is more suitable for occasions with mild wear, while thermal spraying is more suitable for occasions with more severe wear.
3. After the repair is completed, the screw is finely processed to ensure its dimensional accuracy and surface quality. Special surface treatment technology is used to ensure that the screw has a good finish, so that the screw can maintain high mechanical properties. This helps to ensure that the screw maintains stable and reliable performance during the extrusion process.
How to evaluate the performance and durability of the repaired screw
1. Test in a real production environment to observe the performance of the repaired screw. The results show that the equipment meets production needs to a certain extent. During the testing phase, we should pay close attention to the fluctuations of key indicators such as production rate and film quality.
2. Comparative evaluation: A detailed comparative analysis of the repaired screw and the new or unrepaired screw was conducted. The results show that the newly made screw has better mechanical properties after repair. By comparing the performance of different screws under the same production environment, we can evaluate the function and durability of the repaired screw.
3. Regular maintenance and inspection: We need to establish a regular maintenance and inspection mechanism to promptly detect and solve possible problems with the repaired screw. Regular inspections should be carried out to replace new parts or redesign the screw when defects are found. This helps ensure that the screw remains stable and reliable during long-term operation.
Conclusion
In general, solving the problem of severe wear of the screw of the film blowing machine is crucial to improving production efficiency and the quality of the final product. Therefore, targeted preventive measures must be taken to avoid or reduce the degree of damage to the screw, thereby ensuring production quality and normal operation of the equipment. In order to prevent the wear of the screw, enterprises should pay attention to the daily maintenance and care of the screw, which can be achieved by selecting high-quality materials, reasonably adjusting production parameters, regularly cleaning the screw, and using appropriate lubricants. In addition, enterprises should also pay attention to communication with customers, timely understand user needs and feedback on screw damage. In the case of severe wear of the screw, effective repair measures should be implemented, and the performance and durability of the repaired screw should be comprehensively evaluated through various methods such as field production tests and comparative evaluations. In addition, enterprises should also choose corresponding solutions according to actual conditions to ensure that the products meet customer needs and improve the economic benefits of the enterprise. Only in this way can we ensure that the film blowing machine always maintains an efficient and stable working state throughout the entire production process, thereby bringing greater value to the enterprise.
