Rim Application

There are many reasons to utilize RIM molding for your next enclosure, housing, cover or structural part. We offer low annual volume production (200-20,000 per year), deep draws, large parts, multiple wall sections within the same part, and more...


Our Process

Our process is as unique and complete as the parts we make using reaction injection technology. With our 40 plus years of part and tooling design for reaction injection parts, partnering with a top PUR manufacturing company early in your concept/design phase...


Project Gallery

Have a look inside our project gallery and see the wide array of industries that choose Thieme Corporation and trust our process to achieve success.


Send Us Your Project

Upload your CAD files (Pro-E, SolidWorks, STP or IGES) along with your annual volumes, paint requirements and other project specific information and we’ll prepare an estimate for the cost and timing for the RIM tooling and part costs of your project.

What is Reaction Injection Molding?

RIM (reaction injection molding) is a process that involves injecting two liquid raw materials (polyol and isocyanate) separately into a heated mold cavity using only a small amount of pressure. The two liquids combine to create an exothermic reaction where they polymerize to form a molded part.

This RIM process can achieve a broad range of physical properties. Depending on the formulation and mix ratios of the two raw material components of the polyurethane, the finished parts can be foamed, a solid, dual-density foam, and can vary from being flexible to very rigid.

Advantages of Choosing Reaction Injection Molding

Advantages of Choosing Reaction Injection Molding

The RIM molding process holds an array of valuable benefits. Here are a few that our customers have found beneficial:

The reaction injection tooling molding process proves to be more cost-efficient than traditional means of molding, especially at low annual volumes of 5,000 parts or below. This is due to the use of cost-efficient polymer materials.

A reaction injection molding company like Thieme knows that reaction injection molding and engineering is an extremely versatile manufacturing process. This method allows for increased creativity since walls of differing thicknesses can be molded in the same part. Parts can be large in size or lightweight. The wall sections can also vary without sink or distortion.

Due to the liquid injection RIM process and nature of the PUR foaming process, unique, difficult, deep drawn and cylindrical parts can be achieved.

High Level Assembly

Thieme is your trusted partner for comprehensive reaction injection molding services. We are capable of fulfilling your needs, no matter your application or industry. We’ve served many customers in need of low annual production volumes that range from 200 units per year up to 5,000 units.

Additional Services:

  • Product Design Assistance
  • Medical device
  • Feasibility studies
  • Tool Design and Manufacturing
  • Simulation and FEA Analysis
  • Prototype Development and Delivery
  • Production Molding Services
  • Painting and Surface Coatings
  • EMI Shielding, HLA Services
  • Value Added Assembly & Kitting
  • Logistics & Packaging
  • Product Fulfillment and Complete Project & Program Management
Request A Digital Design Guide 2

Request a RIM Design Guide

Request a “Design for Reaction Injection Molding” Design Guide which highlights material selection, part design guidelines, molding in functional features and tooling considerations.

Request a Proposal

Thieme offers affordable reaction injection molding tooling solutions for companies everywhere. Request a Proposal Now!