The screw extrusion system is maintained through two methods: daily maintenance and regular maintenance:

(1) Daily maintenance is a regular routine work that does not occupy equipment operating hours and is usually completed during driving. The key is to clean the machine, lubricate all moving parts, tighten easily loose threaded parts, timely inspect and adjust the motor, control instruments, various working parts and pipelines, etc.

(2) Regular maintenance is usually carried out after the extruder has been running continuously for 2500 to 5000 hours, and the machine needs to be disassembled for inspection, measurement, and identification of the wear of main components. Parts that have reached the specified wear limit are replaced, and damaged parts are repaired.

(3) It is not allowed to run empty to avoid screw and machine galling.

(4) If abnormal noise occurs during the operation of the extruder, it should be immediately stopped for inspection and repair.

(5) Strictly prevent metal or other debris from falling into the hopper to avoid damaging the screw and barrel. To prevent iron debris from entering the barrel, magnetic components or magnetic racks can be installed at the feeding port of the barrel to prevent debris from falling. The material must be screened beforehand.

(6) Pay attention to the cleanliness of the production environment, and do not allow garbage and impurities to mix with materials to block the filter plate, affecting product output, quality, and increasing machine head resistance.

(7) When the extruder needs to be stopped for a long time, anti rust lubricating grease should be applied to the working surfaces of the screw, machine blade, machine head, etc. Small screws should be suspended in the air or placed in a dedicated wooden box, and leveled with wooden blocks to avoid deformation or damage to the screws.

(8) Regularly calibrate temperature control instruments, check their adjustment accuracy and control sensitivity.

(9) The maintenance of the gearbox of the extruder is the same as that of a general standard gearbox. Mainly for checking the wear and failure of gears, bearings, etc. The gearbox should use the lubricating oil specified in the machine manual, and add oil according to the specified oil level height. If the oil level is too low, the lubrication will not reverse, and the service life of the parts will be reduced; Excessive oil, high heat generation, high energy consumption, and easy deterioration of oil can also lead to lubrication failure and damage to parts. The oil leakage part of the gearbox should be replaced with a sealing gasket in a timely manner to ensure the amount of lubricating oil.

(10) The inner wall of the cooling water pipe attached to the extruder is prone to scaling and external corrosion and rust. Careful inspection should be carried out during maintenance. Excessive scale can block the pipeline, fail to achieve cooling effect, and severe corrosion can cause water leakage. Therefore, measures such as descaling and anti-corrosion cooling must be taken during maintenance.

(11) For DC motors that drive screw rotation, it is important to focus on checking the wear and contact of the brushes, and regularly measure whether the insulation resistance value of the motor is above the specified value. In addition, check whether the connecting wires and other components are rusted and take protective measures.

(12) Designate a dedicated person to be responsible for equipment maintenance and upkeep. And record each maintenance and repair situation in detail in the factory equipment management file.