Superior Service From Our Team Of Experts

Our Services offered

We offer Design and Engineering, On-site Manufacturing,
Retrofitting, and Support (online and off-line).

Design & Engineering

Our staff has years of experience designing and engineering precision Hot Runner systems and components. We listen to our customers to understand their needs and requirements. Then we design and engineer the Hot Runner system and/or component to fit their plastic injection molding system. We have earned a reputation for resolving difficult molding applications.

On-site Manufacturing

All products are designed and manufactured at our facility in Saint Charles, Illinois. This provides complete control over the manufacturing process which offers:

  • Quality control
  • Reduced cost
  • Flexibility to meet demanding delivery requirements
  • American made


Our unique capabilities include retrofitting existing molds, ensuring smooth Hot Runner performance. We have helped our customers identify cost effective ways to modify their system to maximize performance and profits.

  • Repairing or re-configuring your system to maximize uptime
  • Replacing heaters, thermocouples, nozzles, and other replaceable components
  • Troubleshooting leaks, heating issues, and flow problems
  • Electrical box configuration or rewiring

Support – Online and Offline:

MDi provides technical assistance via:
  • Telephone – 630-443-4000
  • Contact Us form
  • Product Specs
  • On-site start up services as part of our sales process
  • Pilot runs for new systems
Reference Guidelines:
Dynamically Balanced
"A balance test was performed on the 2 x24 70mm spout hot runner manufactured by MDI. The calculations show that the system is 97% balanced with all tips at the same temperature."

John Tauber // Berry Plastics Corporation

Reliable Durability
"The 8 cavity mold from Melt Design was a custom tool built back in 2000. This tool runs 24x7x365 and has produced more than 40,000,000 pieces to date. The material we run is S.A.N. The MDI system has proven to be very reliable for us."

Bill Martz // Sun Star Inc.

Perfect Performance
"We re-tested the “LCP connector” mold which has the special nozzle from MDI. The nozzle performed perfectly and we achieved perfect parts. Your advice was absolutely correct and I thank you for the help. I declare this nozzle to be LCP approved."

John Tipton // Tipton Mold & Die Co.

Over 35 years of experience

With over 25 patented products created in that time, we’re always looking to innovate.

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