Silicone Rubber Molding

Silicone Molding Quick Turn Silicone Parts, Get Your Project Started Faster

  • Order as little as 1 part – 10k+ parts
  • Get silicone parts in days
  • Get a quick quote in less than 48hrs
  • LIM, LSR and Compression silicone molding

Advantages & Benefits of Using Silicone Rubber Molding

Getting to market faster; quicker, better iterations and significantly lower project development costs are benefits that every RevPart customer enjoys. Our proprietary custom liquid silicone rubber molding rapid prototyping services gives you the ability to receive quotes fast and rapidly make silicone parts and silicone prototypes.

In addition to the many benefits of using RevPart there are several key advantages to using a silicone molding process. Including:

Flexible and Resilient

  • Impact and drop protection
  • Soft tactile feel (ergonomic)
  • Great sealing performance

No taste or smell

  • Inert material
  • FDA and Medical grades available
  • Used in food, medical industries

Great durability

  • Good weather resistance
  • Performs over wide temperature range
  • Chemical resistance

Non-conductive

  • Electrical insulator
  • Available in UL certified materials
  • Commonly used in electronics industry

Efficient silicone molding process

  • Molding creates economical parts, fast
  • Great for medium to high volume production
  • Many options: durometer, finish, color

Where do you find silicone parts?

Due to Silicone’s unique set of properties it has become one of the most popular elastic materials and you can find examples of silicone rubber molding across many industries. Here are some industries where silicone molding is used:

In addition to the many benefits of using RevPart there are several key advantages to using a silicone molding process. Including:

  • Catheters Implantable cartridge
  • O-rings, Gaskets and Plugs
  • Storage devices

Automotive Industry

  • Valve Membranes
  • O-rings and gaskets
  • Vibration dampeners

Food/Appliance Industry

  • Silicone baking dishes
  • Flexible ice cube trays
  • Baby bottle nipples
  • Cell phone cases
  • Gaskets and dampeners
  • Tactile buttons
  • Aviation/ Aerospace Industry
  • Industrial/ Construction industry
  • Personal Care Industry

Types of Silicone Rubber Molding

We offer two different types of silicone rubber molding; LIM (Liquid Silicone Molding) and compression molding. What makes these two types different is the technology, process and machine that is used to mold the parts. While both processes are great options your part geometry and complexity will likely determine which process to use. Here is some more information on each process:

LIM Silicone molding:

Also known as LSR silicone molding (Liquid Silicone Rubber), this is a liquid injection molding process, where a high-viscosity liquid comes in two parts, Part A and Part B is loaded into the molding machine. The machine mixes the two parts just before it is injected into the mold cavity, where a chemical reaction causes it to cure very quickly. After the part is cured the part is either ejected or manually pulled from the mold. Liquid Silicone Rubber Molding has some distinct benefits:

  • Create high tolerance parts
  • Eliminate/reduce contaminates due to closed system molding
  • Create complex geometries

Compression molding:

The process involves placing a silicone rubber sheet onto a heated mold cavity. The rubber sheet is compressed between the two mold halves and fills to the mold cavity due to heat and pressure. The part is allowed to cool and is removed from the mold. Compression molding has some distinct benefits including lower molding and manufacturing costs. This makes compression molding the ideal choice for parts with low-medium complexity such as o’rings and sealing gaskets.

Differences Between LIM and Compression Molding

The big difference between the two is cost and shape complexity. The LIM process requires a silicone rubber mold that can withstand high pressures while a compression silicone mold has low pressures. This leads to higher costs for LIM silicone molds compared to an equivalent compression silicone mold. In addition to higher mold cost LIM silicone typically has a higher processing cost than compression molding.

The major advantage to LIM silicone it can produce more complex shapes — and at tighter tolerances — than compression molding. What’s more, LIM is a closed process, so there’s less risk of end part contamination, which makes this process ideal for creating parts for the medical industry. Food, appliance

Unsure of whether LIM or compression molding is the better fit for your application? Contact RevPart today and let the experts there help you select the better molding method.

The Silicone Molding Process

Whether you’re using LIM silicone or compression silicone both have a similar processes. They both require building a mold and both process require running silicone material though the mold. RevPart has in-depth knowledge on both processes. A good part starts with a good design and we can help you with that. We have years of industry knowledge that we can use to help ensure your part comes out right the first time.

Building the liquid silicone rubber molding

Before making your silicone parts we first have to make the mold. Once you place your order our mold engineer begin designing the ideal mold for your part. Once the design is complete it moves into our mold building department. All RevPart silicone molds are built from high grade steel materials using CNC and EDM machines to create the mold cavities. Once the mold is complete we begin testing the mold and measuring all the dimensions to ensure it meets your specifications.

Making silicone parts

Your silicone rubber mold is moved into the production department and prepped for molding. The mold is placed into position on the molding machine and goes through an initial setup. Once setup is complete we are all ready to run parts. When dealing with a new mold we will go through FAI (First Article Inspection) process to ensure the parts are meeting your dimensional tolerances. Once the parts are approved we are all set to begin producing parts.

While we already mentioned that pigment can be added to the material to color it, there are several other value-added services as options. Contact RevPart to learn more about these value-added service options.

ISO 9001

Quality Control

ISO 14001

Environmental

ISO 13485

Medical

TS 16949

Automotive

How we succeed

At Central One customer stay at our focus. We believe that by putting the customer first and providing excellent customer service the project in turn will be successful.