Leading Rubber Compression Molding Manufacturers

Originally, compression molding has always been used to mold rubber. Today it is still used extensively overall as it is an economical method. Compression molding is a closed-mold process in which tremendous pressure is applied to the product. It is a very reasonable molding method for low to medium volume production. Read More…

Rubber Compression Molding Originally, compression molding has always been used to mold rubber. Today it is still used extensively overall as it is an economical method. Compression molding is a closed-mold process in which tremendous pressure is applied to the product. It is a very reasonable molding method for low to medium volume production.

RD Rubber Technology Corp is an ISO 9001:2015 / AS9100:2016 certified and ITAR registered company. We offer compression, transfer, injection and Liquid Injection molding, rubber to metal bonding, engineering support, tooling design, machining and more. Our customers rely on us to give them the best possible production solutions for rubber molding. From aerospace to medical, food processing to...

RD Rubber Technology Corporation $$$

If you have a need custom rubber molding for products with a fast turnaround, Britech Industries is the company you need to call. We do molded, extruded and die cut rubber – of various products and in the colors and compounds you need.

Britech Industries $$$

With more than a century of manufacturing experience, Pierce-Roberts Rubber Co. is your source for custom molded rubber products.

Pierce-Roberts Rubber Co. $$$

Rubber molding is what we do best. We believe in offering our very best to all customers no matter how large or small. For over 65 years we have pushed the boundaries of what we do and continue to improve our products and customer service every day.

Accurate Products, Inc. $$$

REDCO Rubber Engineering & Development is your complete source for rubber molding products, including rubber rollers, die-cut gaskets, and custom rubber products to suit your application.

REDCO Rubber Engineering & Development Company $$$

Mason Rubber is a full-service organization assisting in the designing or reverse engineering of custom product to fulfill your production requirements.

Mason Rubber Co., Inc. $$$

Kent Rubber Supply leverages our experience, innovation and continuous development to ensure our customers get the best products. We specialize in small to large batch production runs of molded rubber parts, allowing us to offer ultimate customization when it comes to a wide variety of specs. Our products vary in shapes, sizes and wall thicknesses in materials such as PVC and urethane. Both...

Kent Rubber Supply Co. $$$

Minnesota Rubber and Plastics (MRP) is a leader in material compound development and the manufacturing of custom elastomeric and thermoplastic components. With facilities across North America, Europe, and Asia, MRP collaborates with original equipment manufacturers to solve difficult sealing and component challenges across multiple markets. Capabilities include materials science and formulation,...

Minnesota Rubber & Plastics $$$

Spring-Fast Grommets with fusion bonded nylon & a polymer cushion prevent wire chafe & give you best in class performance, 49% install savings & a 9.5x efficiency improvement. The nylon clad metal substrate snaps on with finger pressure & self locks - eliminating adhesives & the old slow & costly gluing process. It is used widely used in across the OEM & contract manufacture sectors. ISO...

Device Technologies, Inc. $$$

At Dynatect Ro-Lab, Inc., we pride ourselves on our expertise in rubber molding, offering a comprehensive range of solutions to meet diverse industrial needs. With a rich legacy in the field, we have honed our capabilities to excel in both large and small parts in either low- or high-volume.

Dynatect Ro-Lab $$$

Jet Rubber Company, employee-owned, offers custom molded rubber and rubber to metal components. They offer rubber molding in a wide array of standard rubber products as well as custom options for those more complex and difficult jobs.

Jet Rubber Company $$$
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placeholder image RD Rubber Technology Corporation Britech Industries Pierce-Roberts Rubber Co. Accurate Products, Inc. REDCO Rubber Engineering & Development Company Mason Rubber Co., Inc. Kent Rubber Supply Co. Minnesota Rubber & Plastics Device Technologies, Inc. Dynatect Ro-Lab Jet Rubber Company

What is Compression Molding?

Originally, compression molding has always been used to mold rubber. Today it is still used extensively overall as it is an economical method. Compression molding is a closed-mold process in which tremendous pressure is applied to the product. It is a very reasonable molding method for low to medium volume production.

It is used to mold products like gaskets, seals, O rings, etc. It is a low-budget solution for the production of medium to large size parts on a small scale with costly raw materials.

How does Compression Molding Work?

Compression molding entails several steps:

  1. It starts with an uncured rubber being formed into a preform. This preform is based on the shape and size of the end product. This preform is then prepared so that it can be molded as desired.
  2. The prepared preform is then put into the hot mold. The mold is temporarily sealed. It is followed by the application of heat and pressure. This is why this process is called compression molding. The temperature, pressure, and other such factors are constantly monitored.
  3. After the molding is done, the mold is opened to remove the cured rubber product.
  4. It goes through post-molding stages e.g., post-curing, packaging, inspection, etc.
Compression Molding

Materials and Equipment Used in Molding

The equipment used in rubber compression molding quite resembles that used in plastic compression molding. Following are some of the equipment needed for rubber compression molding:

  • Mold plates
  • Mold cavity
  • Alignment pins
  • Compression molding press
  • Hydraulic press

The rubbers usually used in compression molding include:

  • Butyl
  • Colored Compounds
  • EPDM
  • Natural Rubber
  • Neoprene
  • Nitrile
  • SBR
  • Viton
  • Fiber Molding

Applications of Compression Molding

Molded rubber items are more than just a finishing touch. They can extend the life of essential and valuable equipment by successfully reducing equipment wear. Here are a few kinds of purchasable molded products: Self-adhesive bumpers, grommets, anti-vibration pads, O-rings, suction cups, vacuum lifters, tubing, etc.

Rubber Compression Molded Parts

In many industries, these things are critical to the form and function of equipment. For example, every day, compression-molded rubber parts help medical facilities, manufacturers, precision mechanics, autos, and other industries.

Why to Choose Compression Molding

Compression molding is widely used because it uses advanced composites. The rubber used is lighter, stronger and unlike metals is corrosion resistant.

The following is a list of compression molding benefits:

  • Tools and equipment are meager cost and affordable.
  • It has the lowest lead time.
  • It has a diverse range of part sizes.
  • This process has a very short set-up time and is favorable for more production runs.
  • It can mold stiffer and more robust materials as well.
  • Large parts with an extended cure time are ideal to be molded by this process.
  • It can create very intricate and complexly designed pieces.
  • It is very cost-effective and has a reduced turnaround time.

Finding the best Compression Molding Press:

Your ultimate decision on a compression molding press is based on these six crucial elements, in addition to safety and convenience of use.

Rubber Compression Molding Machine

  1. The amount of rubber you'll need for your product.
  2. The bare minimum temperature required to heat your rubber.
  3. Minimum time required to heat your rubber.
  4. Choosing the most appropriate heating method.
  5. Calculating the required amount of force.

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