First, mold maintenance before installation
Before installing the mold, it's essential to clean both the upper and lower surfaces thoroughly. This ensures that the mold mounting surface and the press table are free from debris, preventing any damage or misalignment. It also helps maintain the parallelism between the upper and lower mounting surfaces during production. Once the mold is installed, open it and inspect all components, especially the guiding mechanism. For surface molds, cleaning the outer parts is crucial to ensure the quality of the final product. Apply grease to sliding parts and check all sections of the mold, particularly safety-related components such as side pins, safety screws, side guards, and punching waste channels.
Second, maintenance during production
During the production process, regular lubrication of key areas is necessary. For example, the drawing ring in a drawing die, the rounded corners, the edges of trimming dies, and the flanging block should be oiled periodically. Additionally, make sure to clean the small hole waste channels of the trimming and punching dies regularly to prevent clogging and ensure smooth operation.
Post-production maintenance
After the production run is complete, conduct a thorough inspection of the mold. Clean the entire mold to maintain its hygiene and remove any residual material. Ensure that all waste is cleared from the mold and the waste box. Document the condition of the mold after use and provide accurate feedback to the mold voucher for future reference.
Secondary mold maintenance
Secondary maintenance refers to scheduled, systematic checks based on the mold’s technical condition and complexity. This task is typically carried out by experienced mold repair technicians and documented accordingly. The following details outline specific maintenance procedures for different components:
For drawing dies and punches: The main issues often involve wear on the convex and concave dies, particularly on textured or profiled surfaces. Polishing the rounded areas is usually sufficient, but if craters or deep marks appear, repairs are necessary.
Guide parts (such as guide posts, sleeves, and guides): These can become scratched due to dirt or improper alignment. Remove scratches using an oil stone and then polish the surface to restore functionality.
Trimming knife edges: Blade edges may chip or break over time. If this happens, replace the damaged spring or elastic components. Springs are one of the most vulnerable parts in a mold and often require replacement. When replacing springs, ensure that the new ones match the original in color, outer diameter, and length for proper performance.
Punching tools: Most punches are standard parts and can break, bend, or deform during use. In most cases, damaged punches are replaced with identical specifications. Key parameters to consider include the working section size, mounting dimensions, and overall length.
Fastening parts: Check for looseness or damage. Replace with matching parts if needed. Pressing and unloading components, such as pressure plates, rubber pads, unloading plates, and pneumatic top-out devices, should also be inspected.
During maintenance, verify the assembly relationships between all parts and check for any signs of damage. Repair or replace any damaged components. Inspect the pneumatic top-out system for air leaks and address them accordingly. If the air hose is damaged, replace it immediately.
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