Silicone & Urethane Casting
Silicone and urethane casting is an excellent way quickly manufacture high-quality plastic cast parts in small to medium quantities (~10-1000 parts) with shorter lead times and lower tooling costs than injection molding. In fact, it has some of the lowest unit costs of any manufacturing technology, including 3D printing, while rivaling injection molding for quality. Moreover, the materials we offer have a range of mechanical, thermal and chemical properties for many different specialized applications.
Cast plastic parts are durable and inexpensive. They consistently render fine surface details and offer high-quality finishes with the look and feel of consumer products. Because they are significantly less expensive than injection molding, silicone and urethane casting are also useful for quickly creating prototypes for molded parts.
A Versatile Alternative to 3D Printing and Injection Molding
We like to think of urethane and silicone casting as a versatile middle ground between 3D printing and injection molding that can offer the best of both worlds. Modern advances in materials have made silicone and urethane cast parts comparable in quality and detail to those manufactured with injection molding. At the same time, these cast parts can be produced in small to medium quantities faster and at less cost than with injection molding.
When compared to 3D printing, silicone and urethane casting materials have a wider range of chemical, thermal and mechanical properties than 3D printed plastics. Because they are not restricted by the size of a printing bed, cast parts also offer better value for medium to large parts. Lastly, cast parts have superior finish and fine detail when compared to 3D printed parts, which means they can accurately create the look and feel of consumer products without any additional finishing.
3D Printed Master Patterns
Whenever applicable, we use 3D printing to create the master patterns for silicone and urethane mold-making, so you can have tooling in weeks, not months. Because urethane casting is so good at rendering fine details, it can easily reproduce custom finishes, saving time and money. We are able to reverse engineer existing objects with 3D scanning as well, allowing us to quickly create accurate models or customizable replacement parts.
Once created, each mold can be used to cast thousands of parts with the look, feel and durability of finished products. Because they are relatively quick and inexpensive to produce, silicone and urethane molds are also a cost-effective option for iterating prototypes for cast or molded parts.
Urethane and silicone molds can cast a range of materials, including elastomers and rigid plastics, as well as silicone, plaster and even concrete. Cast plastic parts can range from 20A - 90D on a durometer and come in high-heat, flame-retardant, food-safe and medical-grade options.
As a result, cast parts can stand up to a variety of specialty applications in demanding environments including the aerospace, medical and food industries. Common applications for rapid casting include electronic housings, gaskets, cosmetic parts and displays. For more information on all of our materials, click here.
Materials for Urethane and Silicone Casting
At RapidMade, we’re committed to making sure that you have the right material for your needs every time. Below, you can find the default materials that we offer for our urethane and silicone casting services. However, we can work with any compatible materials, including concrete and plaster. If you don’t see the material you’re looking for here, contact us by email or phone to see if we can work with it.
BJB F Series
Fast-curing, flexible urethane rubber material with a range of applications. Available in all A hardness ratings.