Cast Extrusion Die and Extruder Maintenance
Proper maintenance of cast extrusion die extruders ensures consistent production quality and extends equipment service life. This guide covers the 12 essential maintenance points every operator should follow.
1. Daily Maintenance
Daily maintenance is a regular routine task that does not take up equipment operation time and is usually completed during the start-up period. The focus is on cleaning the machine, lubricating moving parts, tightening loose threaded parts, and timely checking and adjusting the motor, control instruments, working parts and pipelines.
2. Periodic Maintenance
Periodic maintenance is generally carried out after the extruder has been running continuously for 2500-5000 hours. The machine needs to be disassembled to check, measure and identify the wear of major parts, replace parts that have reached the specified wear limit, and repair damaged parts.
3. No-Load Operation Prohibition
No-load operation is not allowed to avoid scoring or galling of the screw and barrel.
4. Abnormal Sound Response
If abnormal sound occurs when the extrusion cast die extruder is running, stop the machine immediately for inspection and repair.
5. Prevent Debris Entry
Strictly prevent metal or other sundries from falling into the hopper to avoid damage to the screw and barrel. To prevent iron sundries from entering the barrel, magnetic parts or magnetic racks can be installed at the material inlet of the barrel, and materials must be screened in advance.
6. Clean Production Environment
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 product output, quality and increase the resistance of the machine head.
7. Long-Term Shutdown Care
When the extruder needs to be stopped for a long time, apply anti-rust lubricating grease on the working surfaces of the screw, barrel, machine head, etc. Small screws should be hung in the air or placed in a special wooden box, and padded with wooden blocks to avoid screw deformation or damage.
8. Temperature Control Calibration
Regularly calibrate the temperature control instrument and check the correctness of its adjustment and the sensitivity of its control.
9. Reducer Maintenance
The maintenance of the reducer is the same as that of general standard reducers. The main task is to check the wear and failure of gears, bearings and other parts. Use the lubricating oil specified in the machine manual, and add oil according to the specified oil level height. Too little oil will lead to poor lubrication and reduce the service life of parts; too much oil will generate a lot of heat, consume more energy, and the oil is easy to deteriorate. The sealing gasket should be replaced in time at the oil leakage part of the reducer.
10. Cooling Water Pipe Maintenance
The inner wall of the cooling water pipe is easy to scale, and the outer part is easy to corrode and rust. During maintenance, a careful inspection should be carried out. Excessive scale will block the pipeline and fail to achieve the cooling effect, and serious corrosion will cause water leakage. Descaling and anti-corrosion measures must be taken during maintenance.
11. DC Motor Brush Inspection
For the DC motor driving the screw to rotate, focus on checking the wear and contact of the brushes, and the insulation resistance value of the motor should also be measured frequently to see if it is above the specified value. In addition, check whether the connecting wires and other parts are rusted, and take protective measures.
12. Designated Maintenance Personnel
Designate a person responsible for equipment maintenance and keep detailed records of each maintenance and repair, and include them in the factory equipment management file.
