Maintenance and upkeep of extrusion machines for extrusion molds

(1) Daily maintenance is a routine work that does not take up 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 components and pipelines, etc.
(2) Regular maintenance is usually carried out after the extruder has been running continuously for 2500-5000 hours and then stopped. The machine needs to be disassembled for inspection, measurement, and identification of the wear of major components, replacing parts that have reached the specified wear limit, and repairing damaged parts.
(3) Empty operation is not allowed to prevent screw and machine from becoming rough.
(4) If there is any abnormal noise during the operation of the extrusion casting die extruder, it should be stopped immediately for inspection and repair.
(5) Strictly prevent metal or other debris from falling into the hopper to prevent damage to 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 in advance.
(6) Pay attention to the cleanliness of the production environment, and do not let garbage and impurities mix into the material to block the filter plate, which will affect the output and quality of the product and increase the resistance of the machine head.
(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 dedicated wooden boxes, and leveled with wooden blocks to prevent deformation or damage to the screws.
(8) Regularly calibrate temperature control instruments, check their correctness of adjustment and sensitivity of control.
(9) The maintenance of the extruder’s gearbox is the same as that of a general standard gearbox. The main task is to inspect the wear and failure of gears, bearings, and other components. 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 be reversed, which will reduce the service life of the parts; Excessive oil, high heat generation, high energy consumption, and easy deterioration of oil can also cause lubrication failure and result in damage to parts. The oil leakage part of the gearbox should be replaced with a sealing gasket in a timely manner to ensure the lubricating oil level.
(10) The inner wall of the cooling water pipe attached to the extruder is prone to scaling, while the outside is prone to corrosion and rust. Careful inspection should be carried out during maintenance. Excessive scale can clog the pipeline, fail to achieve cooling effect, and severe rust 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 in detail in the factory equipment management file.

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