The punching die of high-speed tablet press is a key component in industries such as pharmaceuticals and chemicals, and its maintenance directly affects the service life of equipment and product quality. The following are detailed maintenance methods:
1、 Daily maintenance methods
1. Instant cleaning: After each operation, the die should be disassembled immediately to remove residual materials and avoid hardening and clumping. Use a soft cloth dipped in specialized cleaning agent to wipe, and avoid scratching with hard objects to prevent surface damage.
2. Stubborn adhesive treatment: If the adhesive is hard, the punch can be soaked in hot water to soften and then removed, or a copper wire brush (wire brush is prohibited) can be used in conjunction with grinding paste to polish the surface of the disc.
3. Rust prevention and lubrication: After cleaning, wipe off the moisture in a timely manner, and apply thin oil (such as protective oil) or rust proof oil on the surface. Apply an appropriate amount of release agent (such as magnesium stearate) on the template before pressing to reduce the risk of sticking and impact.
4. Storage standard: Store in a dry, ventilated place, avoid moisture and direct sunlight. Long term disuse requires removing the die, applying rust proof oil to the friction surface of the equipment, and covering it with a dust cover.
2、 Key points for regular maintenance
1. Deep cleaning: After producing a certain quantity of products, use specialized cleaning agents to thoroughly remove accumulated rust and impurities, especially in areas prone to dirt accumulation such as gaps and holes.
2. Lubrication of key components: Select the appropriate lubricant to apply to the guide mechanism and the contact surface between the convex and concave molds, which not only reduces friction loss but also prevents excessive grease from contaminating the workpiece.
3. Accuracy testing: Use equipment such as hardness testers and coordinate measuring instruments to measure the dimensional accuracy and hardness changes of key parts, and promptly repair minor wear.
4. Material compatibility check: Select matching die materials (such as alloys with high chromium content) and coatings (chrome/chromium nitride) based on material characteristics (such as corrosiveness, fine powder ratio).
3、 Common problems and preventive measures
1. Adhesive punching problem: maintain the surface smoothness of the die and use a suitable release agent; Control the moisture content of particles within a reasonable range.
2. Die wear: Regularly inspect the punch for missing edges, cracks, or deformation, and replace damaged parts in a timely manner. Monthly inspection of vulnerable parts such as rail guides and pressure wheels.
3. Abnormal operation: Pay attention to the sound of equipment operation. If there is abnormal noise, stop the machine immediately for inspection, which may be a sign of loose or worn components.
4. Uneven filling: Improve particle flowability by adding flow aids such as micro silica gel; Adjust the feeder balance or ensure proper installation.
4、 Cleaning and disinfection methods
1. Routine cleaning: After removing the punch, clean the rust proof oil with 95% anhydrous alcohol, paying special attention to avoiding collisions between the punch heads.
2. Deep disinfection: Medical stamping dies need to be treated with specialized disinfectants to ensure compliance with GMP requirements. After cleaning, apply pharmaceutical grade anti rust oil for storage.
3. Internal cleaning of equipment: Use a soft brush or vacuum cleaner to remove accumulated dust, with a focus on cleaning key parts such as gears and bearings.
4. Environmental control: Maintain a low dust environment in the workplace, especially strict dust prevention is required for pharmaceutical tablets.
Through the maintenance methods of the above system, the service life of the high-speed tablet press die can be effectively extended, ensuring production efficiency and product quality. In practical operation, maintenance cycles and methods should be adjusted according to specific equipment models and production requirements.