How You Benefit

The Importance of Injection Mold Repair & Maintenance

Plastic injection molds are amazing manufacturing devices. They withstand tons of pressure and heat every day. It is inevitable that some will crash, seize, break or need maintenance. When they do, it's time to call MPP. We are plastic injection mold repair and maintenance experts. We do preventive maintenance, which includes full mold teardown and cleaning, as well as repairs that fix any damage and restore your mold to print tolerances. We are fully equipped to overhaul, repair and return to original condition the molds we make, as well as molds from other mold builders, including foreign manufacturers.

Know when

How to Know When an Injection Mold Needs Repair or Maintenance

How do you know when a mold needs maintenance or repair? Short of a complete failure, here are the tell-tale signs to look for in the parts that are produced by the mold:

  • Short shots where parts are ejected in an incomplete state
  • Burrs and flashing caused when excess plastic seeps into gaps in the mold
  • Flow marks caused by uneven injection speed or cooling
  • Blistering, stress cracks, and burn marks brought on by prolonged exposure to high temperatures
  • Drag marks caused by a misaligned ejector system
  • Voids or depressions from non-uniform heating or cooling of materials
  • Contaminants from breakdowns in the mold
  • Color streaks or discoloration that arise when mixing is not uniform, or a failure to properly flush the hopper and feeder
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Know Why

Why Choose MPP for Injection Mold Repair & Maintenance

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At MPP, we understand that, when repaired, injection molds need to meet the same exacting standards to which they were manufactured. We also know that time is of the essence. This is why we offer quick turnaround emergency mold repair and maintenance.

What makes us different when it comes to repair and maintenance?

  • 100+ Years of Combined Experience
  • Fast Turnaround to Minimize Downtime
  • Pickup and Delivery
  • We Repair Domestic and Foreign Molds
  • We Protect Your Investment
Know How

MPP Repair & Maintenance Processes


MPP Mold Repair Services 

Our mold repair follows an eight-step process:

  1. Preparation
  2. Disassembly
  3. Troubleshooting
  4. Corrective Action
  5. Cleaning
  6. Assembly
  7. Final Check
  8. Staging

Our repair services include:

  • Parting line (flash) repair
  • Microwelding
  • Welding
  • Alignment
  • Cavity/core repairs
  • Venting repairs
  • Hot runner repairs
  • Ejector system repairs
  • Complete mold refurbishment

MPP Mold Maintenance Services

When it comes to injection mold maintenance, we perform all of the following services to return your mold to its original specifications and performance behaviors:

  • Inspect all aspects of the injection mold, including runners, cavities, gates, plates, and sprues regularly for early identification of potential problems.
  • Use compressed air to remove any unwanted materials such as dust from the mold.
  • Clean all mold components using a non-toxic solvent.
  • Add lubrication, and in most cases, rust preventative to the injection mold.
  • Look over hot runners and water lines for potential issues since these are often the cause of mold performance problems. Water lines should be flushed and drained to remove unwanted moisture.
  • When storing an injection mold, the mold needs to be completely dry. Plates should be separated, the system properly cleaned and lubricated, and components, such as pins, or springs, tightened or replaced.

Keep your molds running forever by recognizing the warning signs of failure

Learn About The 7 Warning Signs of Plastic Injection Mold Failure

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