• Injection Molding
  • Compression Molding
  • Extrusion Molding
  • Rubber Bonded to Metal
  • Rubber Bonded to Fabric or Nylon
  • Valued Added Service

Rubber Injection Molding

With over 35 years of experience in rubber industry, Liangju Rubber offers competitive pricing combined with excellent product quality and service. We are ISO and IATF certified and experienced in meeting the strictest quality standards. Rubber injection molding is used to develop both solid rubber parts and rubber-to-metal bonded products. Rubber compounds can provide a wide variety of properties that solve problems from seals or gaskets, noise and vibration isolation, abrasion and impact resistance and chemical/corrosion resistance. Rubber injection molding is an ideally suited for mid-to-high-volume production and where tight tolerances, part consistency or over-molding are required. In addition, rubber injection molding works well with rubber compounds that have faster cure times. This is a process that can be fully automated.

Rubber Injection Molding Process

1-Material in injection unit ready for injection into cavities.
2-Material is injected from injection units through runner system and gates into cavities.
3-Parts (materials) are cured in mold until the cure process is completed.
4-Molded rubber parts are removed from mold and the process is ready to begin again.

Advantages of Rubber Injection Molding:

●Suits automation with automatic material feeding
●Complementary to high precision molding applications
●High level of repeatability
●Closed mold injection supports molding of complex geometries and overmolding
●Reduced cycle time
●Flashless tooling
●Economical process for high volumes of medium to high precision components
●Capable of producing overmolded components
●Minimal material waste

Disadvantages of Injection Molding vs. other rubber molding methods

●Higher start-up / shutdown costs, better suited for high volume applications
●Runner systems can lead gross material weights when cold runner systems or other low waste options are not utilized.
●Not all cure systems and elastomers are suitable for injection molding.
●The complete elimination of pre-forms

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