RIM Molding Specialists



Request a Proposal

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.

Request a Proposal

Rim Application

There are many reasons to use RIM molding for your next enclosure, housing, cover or structural part. One or more of these are usually the case for parts made using RIM (reaction injection molding). Low annual volume production, deep draws, large parts, multiple wall sections within the same part, insert molding and assembly aides and incorporating function into the part.

Our Process

At Thieme Corporation, our process is as unique and complete as the parts we make using RIM technology. With our 40 plus years of part and tool design for RIM parts, partnering with Thieme Corporation early in your concept/design phase of a plastic assembly can yield cost savings and manufacturing advantages well beyond simple part cost.

Project Gallery

Have a look inside our project gallery and see the wide array of industries that choose Thieme Corporation and the reaction injection molding (RIM) process to achieve success. We make parts, assemblies and structural plastics for all industries including automotive, medical, scientific, transportation, agriculture, heavy equipment, gaming, currency handling, petrol, security, electronics and many others.

High Level Assembly

T hieme Corporation provides complete turnkey services for your device enclosure from concept to fulfillment. We pride ourselves on our High level assembly (HLA) services which we supply assembly line ready components and assemblies to many of customers.

In addition to molding your device covers, enclosures and housings we provide the following services: Product Design Assistance, RIM 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 RIM Design Guide

R equest a “Design for RIM” Design Guide which highlights material selection, part design guidelines, molding in functional features and tooling considerations.
Request a RIM Design Guide


  • Project Management:Open or Close

    No matter where Thieme joins the part design process for your product assembly, Thieme will assign a project manager, designer and commercial program manger to your account. This same team will guide your RIM project from start to finish.

  • Product/Part Design AssistanceOpen or Close

    Your Thieme team has over 45 years of design experience in RIM parts and Rim tooling. Rest assured that we will incorporate as many cost reduction, risk mitigation and quality features possible into your part design and optimize it for RIM production.

  • RIM feasibility studiesOpen or Close

    Each part that is reviewed by Thieme goes through an extensive RIM Feasibility study to ensure the design, function and performance of the part/assembly will be suitable for the RIM process.

  • Tool DesignOpen or Close

    Thieme has been designing Rim tooling for over 40 years and incorporates many company driven innovations to give you a RIM tool that is guarantee to be of the latest design/rim technology. We always internalize out tool designs as a step to guarantee the part is right the first time, every time.

  • Simulation and FEA AnalysisOpen or Close

    In many situations, analysis needs to be performed to ensure moldability, part stress and performance. In some cases, Thieme will perform these analyses to ensure your part and our tool design perform to the optimum standard.

  • PrototypeOpen or Close

    Thieme Corporation offers a full line of prototyping ideas prior to production including, stereo lithography, cast urethane models, FRP & PUR block mock ups.

  • Production MoldingOpen or Close

    Thieme Corporation is first and foremost a production RIM molder. We have the capability to mold many types of systems and various levels of production including small annual runs of 200 up to annual runs of hundreds of thousands.

  • PaintingOpen or Close

    Thieme Corporation in association with our painting partner, provides world class finishing systems for your parts including flat, low gloss, texture and high gloss finishes for parts up to 10’ x 8’ x 3’.

  • EMI ShieldingOpen or Close

    In parts requiring electrostatic protection, shielding and electro conductivity, Thieme offers EMI shielding through our paint finishing services. The most complex masking treatments can be achieved.

  • High Level Assembly (HLA) Operations:Open or Close

    In addition to manufacturing your plastic covers, housings and enclosures, Thieme Corporation performs high level assembly operations including component assembly, wiring harness, cabling, laser mounting, control panel mounting and other sensitive assembly operations. This is a value added service that can lower your assembly costs when the Thieme enclosures arrive to your assembly line ready for installation.

  • Kitting and Logistics:Open or Close

    Thieme provides kitting and full logistics for all parts including those that are not made of rim. Specialty line shippping racks are designed for your assembly parts in your assembly line ordder.

  • Gage & Check Fixtures:Open or Close

    Thieme builds gage and check fixtures in cases when such are required. We take a no nonsense approach to ensure the gage/fixture is easy to use, is of low cost and performs correctly for the life of the program.

  • Shipping:Open or Close

    Thieme provides warehousing space and prepares shipments to meet the critical demands of transcontinental shipping requirements. We take pride in our on-time shipping record.