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This section provides an overview for rubber moldings as well as their applications and principles. Also, please take a look at the list of 11 rubber molding manufacturers and their company rankings. Here are the top-ranked rubber molding companies as of January, 2025: 1.StockCap, 2.SRM Industries Ltd., 3.Aero Rubber Company, Inc.
Table of Contents
Rubber molding is the processing of rubber into a specific shape using a mold or other means.
Rubber molding includes compression molding, transfer molding, and injection molding.
Rubber molding is a technique used in many industries. Depending on the molding method, it is used for the following:
This is a general rubber molding method. It is widely used for parts of automobiles, medical equipment, industrial machinery, etc.
This method is used for molding complex shapes because of its higher dimensional accuracy than compression molding.
Injection molding is suitable for mass production because it requires less vulcanization time than compression molding or transfer molding and can significantly increase production volume. It is also possible to mold complex and thick-walled shapes with injection molding.
The principle of rubber molding differs depending on the method of rubber molding.
Rubber material is placed in a mold for molding, and pressure is applied and held for the required time. It is possible to mold with lower pressure than other methods.
The rubber material that has been heated and softened is placed in a portion known as a pot, and when pressure is applied, the rubber material flows into the mold through the inlet port. The mold is then held for the required time to mold.
More complex shapes can be molded than with compression molding. However, it is necessary to remove the remaining material from the pot. Mold cost is lower than injection molding.
Injection molding is performed by injecting heated liquefied rubber material into a mold. Small and complex shapes can be molded. It is also suitable for mass production. However, the equipment is large and the mold costs are high.
Nozzle temperature and mold temperature must be controlled when molding rubber.
Nozzle Temperature
For natural rubber, it is recommended to set the nozzle temperature at 70°C. For ethylene and propylene rubber, it is recommended to set the nozzle temperature at 70°C. For ethylene, propylene rubber (EPDM), nitrile rubber (NBR), acrylic rubber (ACR), and chloroprene rubber (CR), the recommended temperature setting is 80°C.
Mold Temperature
For natural rubber, the recommended setting temperature is 160°C. For EPDM and NBR, the recommended setting temperature is 175°C. For ACR, the recommended setting temperature is 180°C. The recommended temperature setting for CR is 170°C.
Inadequate molding conditions in rubber molding will result in defects. The following seven factors are the main causes of molding defects.
Elastomer, a rubber material, is a thermoplastic resin. It has the physical properties of rubber at room temperature and plastic at high temperatures. Elastomers can be molded by combining different materials or by inserting molding, in which metal or other parts are placed inside the mold.
*Including some distributors, etc.
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StockCap was founded in 1950 and is headquartered in Arnold, Missouri as a division of Sinclair & Rush, Inc. The company is an ISO 9001:2015 certified custom designer and manufacturer of parts for the automotive, finishing, and HVAC markets. The company produces several types of products including caps, plugs, tapes, and others, using materials such as vinyl, rubber, and plastic. The company’s custom capabilities include plastic injection molding, vinyl dip and rubber molding, extrusions, thermoforming, and finishing operations.
Aero Rubber Company began in 1973 and is a family-run business based in Tinley Park, Illinois. Aero Rubbery Company is a custom manufacturer of rubber components such as tubing, sheeting, seals, and gaskets. Aero also offers fabrication services including die cutting, water-jet and lathe cutting, slitting, and vulcanized splicing. Aero Rubber is an ISO 9001:2015 certified company. Aero Rubber manufacturers use materials such as Viton, Neoprene, EPDM, silicone, and rubber materials. Aero Rubber manufacturing includes molded parts such as gaskets, extruded parts, sheeting, fabricated parts, and mandrel-made parts. Value-added capabilities are also offered.
Tricomp, Inc. is a manufacturer providing sealing and gasketing solutions, headquartered in Pompton Plains, New Jersey. Their product range includes weather strippings, shower door magnetic strips, and flexible magnetic strips. These products are designed to create a tight seal, preventing leaks, providing insulation, and protection against environmental factors such as moisture, dust, and noise. They also offer double bulb seals and options with or without pressure-sensitive adhesive. Tricomp, Inc. uses NSF, FDA, and UL approved materials, guaranteeing compliance with industry standards.
Vanguard Products Corporation is headquartered in Danbury Connecticut. The company is an ISO 9001:2015 certified full-service manufacturing and engineering company providing the industry with precision elastomeric fabricated goods, producing all custom and standard goods in the United States. The company offers custom rubber and silicone products, as well as standard products including food-grade silicone tubing, rubber tubing, and fabricated EMI and RFI shielding products. The company also offers a materials configurator for customers to design with their own materials based on preference for qualities and resistance to various elements.
Custom Gasket Manufacturing is based in Englewood Cliffs, New Jersey. Custom Gasket serves several industries such as power generation, lighting, transportation, water & air filtration, food processing, pump & valve, electronics, cryogenic equipment, oil & gas, construction, agriculture, pharmaceutical, pulp & paper, HVAC, as well as others including OEMs. Custom Gasket Manufacturing produces many types of custom products including rubber elbows, rubber diaphragms, insulators, seals, extrusions, and as per their namesake, gaskets. Custom Gasket also offers rubber extrusion, die cutting, rubber molding, water jet cutting, laser cutting, and flash cutting services.
SRM Industries Ltd.,founded in 1980, is a manufacturer based in the United Kingdom, specializing in the production of quality rubber and polymer-based products. SRM Industries manufactures a range of products, including rubber gaskets, seals, and custom-engineered components. These products find applications in industries such as automotive, aerospace, construction, and healthcare. SRM Industries' target audience includes manufacturers, engineers, and businesses seeking rubber and polymer solutions. The company offers tailored solutions, and a devotion to sustainability by using eco-friendly materials and production processes.
The Rubber Company, established in 2013 and headquartered in Romsey, Hampshire, is a British manufacturer and supplier of rubber products. Some of the company’s products are rubber and polyvinyl chloride (PVC) extrusions used for sealing, noise control, vibration control, and decorative trim. Product variants include seals and extruded rubber profiles, flame retardant neoprene and silicone, conductive extrusions and coatings, as well as miniature profiles. These products find applications in various industries such as automotive, construction, engineering, marine, and lighting. Additionally, The Rubber Company offers specialist products like anti-slip flooring and mats used in agricultural, commercial, gym, residential, and leisure settings.
Air Water Mach Inc., established in 1962 and headquartered in Matsumoto, Nagano, Japan, is a manufacturer of sealing materials and industrial plastic products. Its product line includes O-rings, cylinder packings, precision rubber products, oil seals, and gaskets, serving diverse industries such as pharmaceuticals, food, machinery, petrochemicals, and semiconductors. The company also maintains factories in Dalian, China, and holds ISO 9001:2000 and ISO 14001:2004 certifications for its adherence to quality and environmental standards.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | StockCap |
19.3%
|
| 2 | SRM Industries Ltd. |
11.9%
|
| 3 | Aero Rubber Company, Inc |
11.4%
|
| 4 | Everest |
9.4%
|
| 5 | Vanguard Products Corporation |
9.4%
|
| 6 | Tricomp, Inc. |
8.9%
|
| 7 | Custom Gasket Manufacturing |
7.9%
|
| 8 | Butser Rubber Ltd |
6.9%
|
| 9 | The Rubber Company |
6.9%
|
| 10 | AIR WATER MACH INC. |
5.0%
|
Derivation Method
The ranking is calculated based on the click share within the rubber molding page as of January 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
5 | 55.6% |
|
United Kingdom
|
3 | 33.3% |
Japan
|
1 | 11.1% |
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