1、 Deep cleaning treatment
1. Ready to use and clear
Immediately disassemble the punching die after use, use a soft cloth dipped in 95% anhydrous alcohol to remove residual materials, and avoid powder hardening, blocking the punching rod or damaging the concave surface of the sheet shape. Stubborn adhesives can be lightly polished with a copper wire brush (steel wire brush is prohibited) and grinding paste, or removed after softening by soaking in hot water.
2. Anti residual corrosion
After cleaning, thoroughly wipe off any moisture, paying special attention to the gaps between the punch and the die hole to prevent residual moisture from causing rust.
2、 Rust prevention and lubrication management
1. Short term rust prevention
After cleaning, apply a thin protective oil or specialized food grade anti rust oil (such as liquid paraffin) evenly to form a protective film that isolates the air.
2. Long term storage
The entire set of stamping dies is completely immersed in rust proof oil and placed in a covered iron box to ensure that the oil covers all surfaces. Store in boxes according to model and wafer type to avoid confusion.
3. Lubrication protection
Apply lubricating oil to the moving parts of the hedge rod before storage to reduce friction loss; A small amount of release agent (such as magnesium stearate) can be injected into the middle mold hole to prevent sticking and flushing.
3、 Standardized storage environment
1. Dedicated storage device
Use mold cabinets or boxes with grid design, place them vertically according to specifications, and leave gaps between punches to prevent collisions.
2. Environmental parameter control
Temperature: Stable at 20-25 ℃ (avoid>30 ℃)
Humidity: Maintain at 30-60%, activate dehumidifier when humidity is too high
Avoid light and ventilation, stay away from corrosive chemicals.
4、 Regular maintenance and inspection
1. Status inspection
Monthly spot checks on molds stored for a long time:
Check if the punch edge is missing or curled
Confirm that there are no scratches or deformations on the wall of the middle mold hole
Test the sliding flexibility of the punch rod.
2. Rust prevention layer maintenance
Check the rust proof oil coverage status every quarter upon unboxing. If there is any volatilization or contamination, it needs to be re soaked. The rusted parts should be repaired according to the process of 'soaking rust removal → polishing → re rust prevention'.
3. Isolation of damaged parts
If cracks or deformations are found in the punching die, immediately isolate it and label the problem to avoid damage to the tablet press caused by misuse.
5、 Key operation taboos
1. Prohibition of mixing: New and old molds, as well as different types of stamping dies, should be stored in separate cabinets. Mixing them can easily lead to differences in sheet weight or equipment damage.
2. Prohibit cleaning of hard objects: Wire brushes and metal shovels can scratch the surface of the die and accelerate corrosion.
3. Avoid humid environments: When the relative humidity exceeds 70%, emergency dehumidification is required to prevent mold growth.
Through the above standardized process, the service life of the stamping die can be significantly extended, ensuring stable quality of tablet pressing. If severe corrosion occurs, it is recommended to use dry ice blasting (-78.5 ℃ low-temperature peeling) or professional rust remover to avoid mechanical damage.