The screw and barrel are the core components of the express bag film blowing machine, which directly affect the plasticization and extrusion quality of the material. Their maintenance is essential. After the daily production is completed, the residual plastic raw materials in the screw and barrel need to be cleaned in time. If the residual raw materials are accumulated for a long time, it will not only affect the plasticization effect of the material produced next time, but also may damage the inner wall of the screw and barrel due to high temperature carbonization. When cleaning, special cleaning materials can be used to squeeze out the impurities in the screw and barrel at a lower temperature. At the same time, regularly check the wear of the screw and barrel to see if there are scratches, pits or deformations. If slight wear is found, it can be polished; if the wear is serious, it needs to be replaced in time to avoid affecting the thickness uniformity and production efficiency of the film. In addition, applying high-temperature resistant grease to the connection parts of the screw and barrel can reduce friction, reduce wear and extend its service life.
The heating system provides the necessary temperature for material plasticization, and the cooling system is used to control the temperature during the film forming process. The normal operation of the two is crucial to ensure product quality. In daily maintenance, it is necessary to check whether the heating elements such as heating coils and thermocouples are working properly, and check whether there are loose connections or damaged components. If uneven heating or abnormal temperature is found, the fault needs to be checked and repaired in time. For the cooling system, ensure that the cooling water circulation is smooth, and regularly clean the scale and impurities in the cooling water pipeline to prevent blockage from affecting the cooling effect. Check the operation of the cooling fan to ensure sufficient wind power to avoid film adhesion or deformation due to untimely cooling. At the same time, regularly calibrate the temperature control system to ensure that the temperature setting is consistent with the actual temperature to provide guarantee for stable production operation.
The traction and winding device is directly related to the molding quality and production efficiency of the express bag film. The surface of the traction roller needs to be kept clean to avoid residual plastic debris or oil stains affecting the traction tension and surface quality of the film. Check the parallelism and surface wear of the traction roller every day. If it is found to be non-parallel or severely worn, it should be adjusted or replaced in time. The tension control system of the winding device is the focus of maintenance. The working status of the tension sensor and controller needs to be checked regularly to ensure the stability of the winding tension. At the same time, clean the surface of the winding roller to prevent the film from wrinkling or loosening during the winding process. In addition, lubricating oil should be added to the transmission parts of the traction and winding devices, such as chains and belts, in time to reduce wear and ensure the smoothness of transmission.
The pneumatic and hydraulic systems of the express bag film blowing machine provide power for the operation of the equipment, and the stability of their performance affects the normal operation of the equipment. During daily maintenance, check whether there is air leakage in the air pipe of the pneumatic system and whether the air pressure is stable within the specified range. Clean the air filter to prevent dust and impurities from entering the pneumatic components and damaging the cylinder, solenoid valve and other components. For the hydraulic system, check the oil level and oil quality of the hydraulic oil. If the oil level is too low, it needs to be replenished in time. If the oil quality deteriorates, the hydraulic oil needs to be replaced. Clean the hydraulic oil filter regularly to prevent blockage from affecting the pressure and flow of the hydraulic system. At the same time, check the working status of the hydraulic cylinder and hydraulic pump to ensure that there are no abnormal conditions such as oil leakage and abnormal noise to ensure the normal operation of the pneumatic and hydraulic systems.
The electrical control system is the "brain" of the express bag film blowing machine, which controls the various operating parameters and actions of the equipment. During daily maintenance, keep the electrical control cabinet clean to prevent dust and moisture from entering, which will affect the performance and service life of electrical components. Regularly check the connection of electrical circuits to see if there is any looseness, aging or damage, tighten loose terminals in time, and replace aging or damaged wires. Check electrical components such as control circuit boards, contactors, relays, clean surface dust, and check whether the components have abnormal signs such as overheating and burning. In addition, back up important control programs and parameters to prevent data loss due to electrical failures, which will affect the normal operation and production commissioning of the equipment.
The mold directly determines the shape and dimensional accuracy of the express bag, and its maintenance cannot be ignored. After each use, it is necessary to clean the plastic remaining on the surface of the mold in time to avoid the solidification of residual materials affecting the quality of the next product produced. When cleaning, use soft tools to prevent scratching the mold surface. Regularly check the wear of the mold to see if the mold mouth is deformed, worn or blocked. If the mold size deviation or surface damage is found, it needs to be repaired or replaced in time. At the same time, apply special mold lubricant to the sliding parts of the mold to reduce friction and ensure smooth opening and closing of the mold. In addition, store the mold in a dry and clean environment to avoid moisture, rust or dust pollution that affects the service life of the mold and product quality.
In addition to maintaining each component, it is also very important to keep the express bag film blowing machine clean and in a good working environment. After daily production, clean up plastic debris, dust and other debris on and around the equipment to prevent them from entering the equipment and affecting its operation. Regularly clean the equipment, including the body, protective cover, operation panel and other parts. At the same time, keep the production workshop well ventilated, control the humidity and temperature of the environment, and avoid damage to the equipment due to environmental factors such as humidity and high temperature. In addition, establish equipment maintenance files, and record in detail the time, content, and parts replaced for each maintenance, so as to facilitate tracking of the equipment's operating status, formulate a reasonable maintenance plan, and ensure the long-term and stable operation of the express bag film blowing machine.
