1005 Portwest Drive
St. Charles, Missouri 63303-5971
Phone: (636) 940-9988
Fax: (636) 940-0225

ISO 9001:2008
AS 9100:2009

Patterson Mold & Tool is a full-service tool and die facility that has been servicing the die cast industry for over 30 years. In 2008, our quality system received the AS9100 standard certification, which has allowed us to provide the aerospace industry with tooling and "fly-away parts". Both industries rely on our proficiency in using the latest technologies to machine complex parts and assemblies with speed and accuracy. You can visit our facility website here.


  • Aerospace
  • Appliances
  • Automotive
  • Electric Motors
  • Lawn & Garden
  • Lighting
  • Motorcycles
  • Small Engine
  • Telecommunications

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Patterson Mold & Tool's manufacturing capabilities have been developed and honed over the last 30 years with a focus on servicing the die casting industry with quality tooling.

We produce our tools using cutting-edge machining techniques on modern equipment, including continuous 5-axis machines. To ensure quality, value and consistency, all tools are cut using CNC machines programmed from solid models and verified with CMM's.

We have a modern facility with a full complement of machinery that includes CNC vertical and horizontal spindles, CNC lathes, precision grinders, tool-room mills, horizontal boring mills, ram and traveling wire EDM's with overhead cranes to support them all. Our biggest manufacturing asset is our people and the quality systems they created.

All of Patterson's manufacturing processes are controlled, scheduled and tracked; this helps us to ensure our delivery dates are met along with collecting data to continuously improve our processes and products.



  • Product Development
  • Solid Modeling
  • Project Management

CNC Milling:

  • Full 5 Axis CNC machining centers
  • Horizontal boring mills
  • CNC mills
  • Vertical machining centers
  • Horizontal machining centers
  • Vertical knee mill


  • RAM EDM machines
  • Wire EDM machines

Milling / Turning / Grinding:

  • Horizontal boring mills
  • Jig bores
  • Universal mills
  • Vertical mills
  • Vertical knee mills
  • Lathes
  • Jig Grinding
  • Surface Grinding
  • Rotary Grinding

CNC Turning:

  • CNC turning centers

Quality / Process Controls:

  • DCC Coordinate Measuring Machines with PC-DMIS
  • Manual CMM