ZhangJiaGang Antron Machinery,Co.,Ltd

How to maintain the extruder

The screw extrusion system is maintained in two ways: daily maintenance and regular maintenance:
(1) Daily maintenance is a regular routine work that does not take up equipment operating hours and is usually completed during the 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 low-working parts and pipelines in time.
(2) Regular maintenance is generally carried out after the extruder has been continuously operated for 2500-5000h and the machine is shut down. The machine needs to be disassembled for inspection, measurement and identification of the wear of the main low parts, replacement of low parts that have reached the specified wear limit, and repair of damaged low parts .
(3) No empty running is allowed to avoid the screw and barrel rolling.
(4) If abnormal noise occurs during the operation of the extruder, stop immediately for inspection or repair.
(5) 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.
(6) 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 the product and increase the resistance of the machine head.
(7) When the extruder needs to be stopped for a long time, it should be coated with anti-rust lubricating grease on the working surface of the screw, machine shaft, head and so on. 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.
(8) Regularly calibrate the temperature control instrument to check the correctness of its adjustment and the sensitivity of control.
(9) The maintenance of the gearbox of the extruder is the same as that of the general standard gearbox. 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. If the oil is too little, the lubrication will not be reversed, and the service life of the low parts will be reduced; too much oil, high heat generation, high energy consumption, oil It is easy to deteriorate, which also causes lubrication to fail and causes damage to low parts. The oil leakage part of the reduction gear box should be replaced with the sealing gasket in time to increase the amount of lubricating oil.
(10) The 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 corrosion is serious, water leakage will occur. Therefore, descaling and anti-corrosion cooling measures must be taken during maintenance. 

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