Industry Leader in Reaction Injection Molding
Who We Are
Premold Corp is a privately owned business with over 40 years of experience in RIM led by President Ximena Schweitz. We operate out of two facilities based in Oconomowoc, WI and our newest facility in Monterrey, Mexico. Both facilities serve a variety of industries while focusing on medical and laboratory instruments for custom low volume polyurethane parts.
What is RIM?
Why RIM
Large Parts
Low Volumes
Low Tooling Cost
Design Freedom
Complex Geometry
Varying wall thickness with no sink
Advantages of RIM vs. Other Processes
High Pressure Injection Molding
- Larger parts
- Varying wall thickness with no sink
- Lower tooling cost
- Shorter tooling lead times
- Combining multiple parts into one part
- Cosmetic Finish
Thermoforming & Vacuum Forming
- Complex geometry
- Cosmetic finishing
- Molded in features (No secondary machining or gluing necessary)
- Encapsulation of metal, plastics, and electronics
- Consistent wall thickness
Structural Foam
- Low volume production
- Varying wall thickness with no sink
- Molded in features (No secondary machining or gluing necessary)
- Lower cost tooling
- More rigid material
In Memory of Ken Schweitz
On June 30th, 2022, Ken Schweitz sadly passed away. As a founder and president since 1995, Ken’s tremendous work ethic, high standards, and dedication to the company, employees, and customers have helped Premold Corp become North America’s largest supplier of World-Class Reaction Injection Molding. His values and standards have become engrained in Premold’s culture and will ensure enormous support for continuous success and growth going forward. By leaving behind his legacy of what Premold Corp has become the team thanks Ken Schweitz for all his work and care over the past decades.
We look forward to working with you!
Premold Corp
- 5657 Frontier Rd
- Oconomowoc, WI 53066
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