Molding rubber is our key strength. We are dedicated to supplying high performance custom molded rubber products.

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Hebei Shida Seal Group offers a complete line of molded rubber products, which meet stringent quality and technical specifications. Our rubber molding services include compression molding and injection molding. We are equipped with state-of-the-art rubber vulcanizing presses (40 sets) and rubber injection machines (20 sets) to meet the various needs of customers for in a variety of market segments. Typical applications include passenger cars, commercial vehicles, recreational vehicles, boats, machinery, air conditional units, etc. 

We can mold a number of polymers including EPDM dense rubber, Nitrile rubber, neoprene rubber and silicone rubber. These molded rubber products include compression molded parts, injection molded parts and rubber-to-metal bonded products. 

Molded Rubber Products:

Rubber Grommets

Anti-vibration Grommets

Wiring Harness Grommets

Manifold Grommets

Multiple-hole Grommets

Brake Pedal Pads

Air Intake Hoses Air Induction Ducts Rubber Bellows & Boots CV Joint Boots
Steering Rack Boots

Molded Seals

Panel Grommets

Rubber Plugs Rubber Diaphragms
Rubber Suction Cups  Rubber Seals & Gaskets

Refrigeration Compressor Grommet

Rubber Bumpers  Rubber Stoppers 
Rubber Bushings Muffler Hangers

Engine & Strut Mounts

Control Cable Rubber Bellows Shift Lever Boots

Rubber Molding Workshop:

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Rubber Molding Capabilities:

  • Compression Molding
  • Injection Molding

Compression Molding

Compression Molding: Compression molding takes place as two plates of a mold are forced together. A slightly oversized rubber preform (raw compound) is shaped to approximately fit into the mold cavity. When the plates are squeezed together, the preform is compressed and forced to conform to the mold cavity. A molding press is used to provide the necessary force to close the mold. Excess material, or flash, that squeezes out is pushed into grooves cut into the top plate and later trimmed off. Once the curing or vulcanizing process is complete, the mold is opened and the molded product can be removed.

Injection Molding

Injection Molding: Injection Molding Injection molding is a different, more complex process than both compression and transfer molding. The most significant difference is that the mold is not forced together, rather the mold halves begin the process clamped together. Once the mold is clamped, preheated rubber is forced into the sprue of a hot mold.Depending upon the complexity of the injection molding machine and the number of cavities, the mechanism used to inject the rubber can be a ram device or a screw-type device. As with other molding processes, once the curing process is finished, the mold can be opened and the part removed. Injection molds must be able to withstand very high pressure—as much as 10 times that of compression or transfer molds—without distorting.

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