Rubber to Metal Bonding

Rubber to Metal Bonding2018-10-29T17:08:19+00:00

Rubber to Metal Bonding

Rubber to Metal Bonding, Insert Molding and Over Molding

For rubber to metal bonding, both injection molding and transfer molding processes are used to bond rubber to metal.  The process depends upon the part application, specifically the use of the finished product. This an ideal process for bonding rubber to metal and plastic parts, an example of such parts would be gears, shafts, rollers, bumpers, and stops in a wide array of sizes and shapes. Additional uses for this process include rubber components bonded to steel, aluminum, brass and plastic.

Our knowledgeable technical staff can assist OEM design engineers with design consulting and selecting the correct rubber compounds.  Our team can provide recommendations based on the performance requirements and part application. Our goal, with every project, is to produce uniform, high-quality products as efficiently as possible. We develop customized rubber to metal bonded solutions to meet customer requirements.

Qualiform outperforms all other rubber to metal bonding companies producing the largest, most complex parts in the industry.  We offer unparalleled experience in this process and are more than happy to consult on your rubber to metal bonding application.

Questions on rubber to metal bonding? Contact our technical staff at (330) 336-6777 or CLICK HERE to send us a drawing.

The Rubber to Metal Bonding Process

Utilizing injection molding and transfer molding to encapsulate and bond rubber to metal is the most effective way to adhere rubber to metal or plastic parts.  The rubber to metal bonding process provides a superior mechanical bond of rubber to metal parts, inserts or plastic parts.

The process requires a two-step preparation of the metal or plastic part prior to molding the rubber.  First, the part must be degreased and cleaned of any contaminants, similar to preparation for industrial coatings or painting.  Next, a special, heat-activated adhesive is uniformly sprayed onto the metal parts.

Once the part is ready for rubber overmolding, the metal parts are inserted into the mold cavity.  If molding a specific area, the metal part is held in place by special magnets.  If the part is to be completely encapsulated with rubber, the part is held in place with chaplet pins. The mold is then closed and the rubber molding process begins.  As the elevated molding temperature cures the rubber, it also activates the adhesive forming a mechanical bonding of rubber to metal or bonding rubber to plastic. To learn more about the rubber to metal bonding processes, click on the following link: rubber injection molding process or transfer molding process.

When a metal or plastic part needs to be completely encapsulated with rubber, rubber insert molding, a variation of rubber to metal bonding, is used.  For complete encapsulation, the plastic or metal part is suspended inside the bold cavity. Rubber can also be molded to a specific area of metal parts.  Mechanically adhering rubber to metal can enhance the stability of metal parts with the flexible characteristics of rubber.  Metal parts with molded rubber can improve part properties such as creating environmental seals, meeting NEMA standards, electrical conductivity, noise and vibration isolation, wear and impact resistance, chemical and corrosion resistance and more.

Materials that can be insert molded, overmolded or rubber to metal bonding of a specific area include: steel, brass, aluminum, alloys, exotics, engineered resins and plastics.

Rubber to metal bonded parts range in size from small inserts to very large components serv.  Overmolded rubber metal parts are utilized across a broad range of applications.

Qualiform molds both natural rubber and synthetic rubber which include:

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


Our technical staff is available to answer any rubber to metal bonding questions. Call (330) 336-6777, or submit a question through our Contact Form or Send Us a PDF.

Rubber to metal bonding
Our technical staff is ready to assist you with all your custom rubber to metal molding needs.
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Rubber to metal bonding

Rubber to metal bonding process used to create bumpers for trains. 

Rubber to metal bonding

Vibration isolation pads used for application in tank trailers.

Rubber to metal bonding

Seal specified for gas and oil drilling industries.

Rubber to metal bonding

Rubber to metal bonded suspensions parts.