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With over 35 years of experience, the TriMech Group offers a comprehensive range of design, engineering, staffing and manufacturing solutions backed by experience and expertise that is unrivalled in the industry. The TriMech Group's solutions are delivered by the divisions and brands shown here, use the links above to visit the group's websites and learn more.

RTV Molding and Urethane Casting

Custom manufacturing service delivering low- to medium-volume plastic parts with production-level quality

Variety of Applications

Utilized for clinical trialsproduct testingalpha/beta buildsprototype and end-use parts.

Less Expensive Molding

Faster and much less expensive to build, as compared to metal injection molds.

Fast Turnaround

Build the RTV mold and start producing high-quality prototype or production parts in under one week.

Why choose Urethane Casted Parts?

Injection molds can be complex to design and very expensive to produce. Depending on complexity, producing injection molds take weeks and even months. Room temperature vulcanization (RTV) molding can be an ideal alternative solution for producing production quality parts, from the very small to very large, and from the very simple to very complex.

RTV molding is a rapid tooling process for creating production-quality parts with rubber molds. Production runs that do not justify the cost of hard tooling can often be economically manufactured with RTV molds.

The RTV molding process uses liquid urethane plastics that closely mimic the properties of injection-molded plastics. Parts can be made in a very wide range of properties, from very rigid to very flexible, with a full range of custom colors that can be blended to match your specifications.

RTV Mold / Urethane Casting Process

Molded plastic part

Master Pattern

To produce RTV molds for the urethane casting process, a highly accurate master pattern is made with rapid prototyping or CNC.

The desired surface texture is applied to the pattern by the finishing team. The texture will be exactly replicated in the production cast parts.

Urethane Casting

Building the Mold

The RTV tool maker builds a box around the master pattern. After gates, sprues, and parting lines are added to the pattern, liquid silicone rubber is poured around the pattern.

After the mold is allowed to cure overnight it is cut open and the master pattern is removed. The mold is then ready to be filled with urethane, silicone, or another custom-blended material. Custom colors will be cast-in, exactly matching the customer specifications.

Molded Blank Part

Molded and Post Processed

The urethane material is cast (injected) into the mold under pressure or vacuum and allowed to cure. Cast parts perfectly match the original pattern when they are removed from the mold.

The cast urethane process offers an extremely wide range of material, color, and texture options. Urethane cast parts can also be clear, color-matched, painted (including EMI shielding), have installed inserts, and custom-finished.

Example Parts

Example low-mid volume production of high quality, precise, and consistent parts that can be molded from flexible, rigid or foam materials, pick on the images below to enlarge:

RTV Molding and Urethane Casting Benefits

Very low tooling cost

Fast delivery of first production parts

Bridge-tooling for production before injection molds are built

Superior material properties

RTV Molding and Urethane Casting Applications

Ideal for over-molded designs

Limited production runs

FR-rated medical enclosures

Variety of colors

Titan Cast parts

Case Study

The Titan Medical Patient Cart

When Ximedica was asked by Titan Medical to design and deliver three complete engineering verification units of their SPORT™ Surgical System patient cart, they contacted TriMech.

Client Testimonials

Thanks so much for all of your efforts. We look forward to working with you in the future.

Just an FYI, the parts you sent over look great. I’m very pleased with them.

Our client was very impressed. You’ll probably start getting business directly from them in the future.

Industries we work with

TriMech services are used in a wide variety of industries

Architecture 3D Printing

Architecture & Construction

  • Model making
  • Urban planning
  • Concepts
Consumer Product 3D printing

High Tech & Consumer Products

  • Aesthetic and function testing
  • Concepts and prototypes
  • Sales and marketing models
Industrial design 3D printing

Industrial Design & Manufacturing

  • Aerospace
  • Automotive
  • Defense
  • Industrial equipment
  • Marine and offshore
  • Oil and gas
Medical 3D printing

Dental, Medical & Life Sciences

  • Anatomical models
  • Medical devices
  • Orthopedics
  • Prosthetics
  • Surgical planning models
Mold tool die 3D printing

Industrial Products, Mold Tool & Die

  • Jigs, fixtures, and assembly tooling
  • Injection molding
  • Silicone molding
  • Sand and investment casting
  • Thermoforming

Interested in RTV Molding and Urethane Casting?

Call 888.392.0957 or Upload Your Part