Maintenance and Upkeep of Used Sumitomo Injection Molding Machine Parts

Maintaining used Sumitomo injection molding machine parts is crucial to ensure optimal performance and prolong their lifespan. At Hunter Plasstics we have more than 30 year of experience with plastic industry. As a Leading Used Machines Seller in North America, we know how to take care of your used molding machine parts . Here’s a detailed guide to routine maintenance and troubleshooting common issues.


Routine Maintenance


  1. Daily Inspections:

    • Check Fluid Levels: Ensure hydraulic oil and coolant levels are within specified ranges. Low fluid levels can lead to overheating and component wear.

    • Cleanliness: Wipe down the machine to remove any plastic residue or dust. Keep the workspace clean to prevent contamination.

    • Inspect Moving Parts: Examine the mold and clamping areas for signs of wear or damage.


  1. Weekly Checks:

    • Lubrication: Apply lubrication to all moving parts. Use the recommended lubricants to avoid compatibility issues.

    • Filter Inspection: Check and clean the filters in the hydraulic system. Clogged filters can reduce efficiency and increase wear.

  2. Monthly Maintenance:

    • Hydraulic System: Inspect hoses and connections for leaks or wear. Replace any damaged components promptly.

    • Electrical Systems: Check wiring for signs of wear or loose connections. Ensure all electrical components are functioning correctly.

  3. Quarterly Servicing:

    • Thorough Cleaning: Perform a deep clean of the entire machine, including the hydraulic system and cooling channels.

    • Component Inspection: Examine critical components such as the screw and barrel for signs of wear. Replace worn parts to maintain performance.


Troubleshooting Common Issues

  1. Inconsistent Cycle Times:

    • Check the hydraulic system for leaks or air pockets. Bleed the system if necessary.

    • Ensure the mold is properly aligned and the clamping force is correctly set.

  2. Poor Part Quality:

    • Inspect the screw and barrel for wear or damage. Worn components can affect material flow and pressure.

    • Verify the temperature settings and adjust if necessary.

  3. Unusual Noises:

    • Listen for any unusual sounds during operation. These could indicate worn bearings or loose components.

    • Regularly check and tighten all bolts and fittings.


Prolonging the Lifespan

  • Regular Training: Ensure operators are trained in proper machine operation and maintenance procedures.

  • Scheduled Downtime: Plan for regular maintenance downtime to perform thorough inspections and servicing.

  • Use Genuine Parts: Always use genuine Sumitomo parts for replacements to maintain compatibility and performance.


By following these maintenance tips and addressing issues promptly, you can ensure that your Used Sumitomo Injection Molding Machine Parts remains in top condition, delivering reliable performance for years to come.