Best Practices for Mold Maintenance and Inspection

To ensure the longevity and efficiency of molds, processing enterprises should adopt a systematic approach to maintenance and inspection. Below are key steps to optimize mold performance and extend its lifespan:

1. Maintain a Mold Resume Card

Each mold should have a detailed resume card that records:

• Usage history.

• Maintenance activities (e.g., lubrication, cleaning, rust prevention).

• Damage and wear patterns.

• Molding process parameters and materials used.

This information helps identify potential issues, provides insights into component wear, and reduces mold testing time, ultimately improving production efficiency.

2. Conduct Regular Performance Testing

Under normal operating conditions, test the mold's performance and measure the dimensions of the final molded plastic parts. This data helps:

• Assess the current state of the mold.

• Identify damage to the cavity, core, cooling system, and parting surface.

• Determine appropriate maintenance measures based on the condition of the molded parts.

3. Focus on Key Components

Pay special attention to critical parts of the mold:

• Ejection and Guiding Systems: Ensure smooth mold opening, closing, and part ejection. Regularly lubricate ejector pins and guide columns, and inspect them for deformation or surface damage. Replace damaged parts immediately.

• Cooling Channels: Over time, cooling channels can accumulate scale, rust, and debris, reducing cooling efficiency and increasing production costs. Clean these channels regularly to maintain optimal performance.

• Hot Runner Systems: Inspect and maintain heating elements, thermocouples, and control systems. Use an ohmmeter to check for damage after each production cycle and replace faulty components promptly. Keep detailed records to track performance over time.

After each production cycle, apply professional anti-rust oil to the mold's working surfaces, moving parts, and guiding components. This is especially important for molds with gears, racks, and springs to maintain their elasticity and functionality.

4. Surface Maintenance

The mold's surface condition directly impacts the quality of the final product. To prevent corrosion:

• Use high-quality, professional anti-rust oil.

• After production, remove residual plastic and deposits using copper tools, cleaning agents, and air drying. Avoid using hard objects like steel wires, which can scratch the surface.

• If corrosion occurs, grind and polish the affected area, apply anti-rust oil, and store the mold in a dry, cool, and dust-free environment.