The maintenance method of screw powder packaging machine should be combined with mechanical structure and sterile operation requirements, and the core points are as follows:
1、 Daily cleaning and disinfection
1. Cleaning of screws and hoppers
After daily production, dismantle the screws, packaging funnels, and hoppers, and thoroughly wipe them with residue free cleaning agents (such as 75% alcohol) to remove powder residues and prevent cross contamination and clumping. Focus on cleaning the screw thread gaps and the inner wall of the funnel to ensure no material adhesion.
2. Aseptic environment maintenance
The studio is disinfected daily to maintain positive pressure laminar flow (Class A cleanliness), and suspended particles and microbial indicators are monitored regularly. Wipe the surface of the equipment and conveyor belt with disinfectant before and after operation.
2、 Regular maintenance of key components
1. Lubrication of transmission system
Add food grade/medical grade lubricating grease (such as silicone grease) to bearings and guide rails every month to avoid accuracy degradation caused by dry friction.
Replace the dedicated lubricating oil every 2000 hours of operation of the gearbox to prevent high-temperature oxidation.
2. Filter replacement
The intake filter should be cleaned every 500 hours (compressed air blowback), and for dusty environments (such as medicine powder and dye), it should be shortened to 300 hours for replacement.
The vacuum system filter (if equipped) should be replaced quarterly to maintain the stability of negative pressure in the packaging.
3. Inspection of seals and vulnerable parts
Check the aging and cracking of the sealing ring of the packaging head every 3 months, and replace the leak proof powder in a timely manner.
The spring plate of the vibrating feeder should be replaced every six months to avoid abnormal amplitude affecting the accuracy of the loading.
3、 Accuracy calibration and functional verification
1. Calibration of weighing system
Verify the weighing sensor with standard weights every week, and the dynamic loading error should be ≤ ± 0.5% (if required for drug packaging). Clean the sensor surface with anhydrous alcohol to prevent dust interference.
2. Consistency test of packaging quantity
After replacing materials or shutting down for 48 hours, it is necessary to continuously test the quantity of 30 bottles to ensure RSD (relative standard deviation)<1.5%.
4、 Deep maintenance and safety standards
1. Annual host maintenance
After running for 8000 hours cumulatively:
Disassemble the motor to check the insulation of the winding and replace worn carbon brushes.
Verify the coaxiality between the screw and the drive shaft, and adjust if the offset is greater than 0.05mm.
2. Key points for safe operation
Do not touch rotating parts during operation, and keep the emergency stop button available.
Before disassembling electrical components, power off and hang warning signs to prevent accidental start-up.
5、 Maintain records and compliance
1. Establish maintenance logs to record lubrication, component replacement, and calibration data, meeting GMP/ISO 13485 traceability requirements.
2. Key operations (such as sterile packaging head installation) require double checking and signature confirmation by two people.
Attention: The powder characteristics (such as moisture absorption and flowability) vary greatly, and the cleaning frequency should be adjusted according to the material. For example, antibiotic powder should be cleaned immediately after packaging to avoid moisture absorption and scaling.