⑴Daily maintenance is a regular routine work, which does not take up equipment operating hours, and is usually completed during start-up. The focus is to clean the machine, lubricate the moving parts, tighten the threaded parts that are easy to loosen, check and adjust the motors, control instruments, various working parts and pipelines in time.
⑵Regular maintenance is usually carried out after the extruder has been running continuously for 2500-5000h, and the machine needs to be disassembled for inspection, measurement, and identification of the wear of main parts, replacement of parts that have reached the specified wear limit, and repair of damaged parts.
⑶ It is not allowed to run empty to avoid the screw and barrel rolling.
⑷ If abnormal noise occurs when the extruder is running, it should be stopped immediately for inspection or repair.
⑸ Strictly prevent metal or other debris from falling into the hopper to avoid damage to the screw and barrel. In order to prevent iron debris from entering the barrel, a magnetic absorption component or a magnetic frame can be installed at the material inlet of the barrel to prevent debris from falling into the barrel. The material must be screened in advance.
⑹ Pay attention to the clean production environment, do not mix garbage and impurities into the material to block the filter plate, which will affect the output and quality of products and increase the resistance of the machine head.
⑺ When the extruder needs to be stopped for a long time, the screw, barrel, head and other working surfaces should be coated with anti-rust grease. The small screw should be hung in the air or placed in a special wooden box, and be leveled with wooden blocks to prevent the screw from deforming or bumping.
⑻Regularly calibrate the temperature control instrument to check the correctness of its adjustment and the sensitivity of control.
⑼The maintenance of the reducer of the extruder is the same as that of the general standard reducer. Mainly check the wear and failure of gears and bearings. The gearbox should use the lubricating oil specified in the machine manual, and add the oil according to the specified oil level. Too little oil, insufficient lubrication, reducing the service life of parts; too much oil, high heat generation, high energy consumption, and easy deterioration of oil , It also makes the lubrication ineffective, causing damage to the parts. The sealing gasket should be replaced in time at the oil leakage part of the reduction box to ensure the amount of lubricating oil.
⑽The inner wall of the cooling water pipe attached to the extruder is prone to scale formation, and the outside is prone to corrosion and rust. Careful inspection should be done during maintenance. Excessive scale will block the pipeline and fail to achieve the cooling effect. If the rust is serious, water leakage will occur. Therefore, measures of descaling and anti-corrosion cooling must be taken during maintenance.
⑾ For the DC motor that drives the screw to rotate, it is necessary to check the wear and contact of the brush. The insulation resistance of the motor should also be measured frequently. In addition, check whether the connecting wires and other parts are rusty, and take protective measures.
⑿A designated person is responsible for equipment maintenance. And the detailed records of each maintenance and repair situation are included in the factory equipment management file.
