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Rubber to Metal Bondings

Rubber to metal bonding for small to medium volumes for a wide range of industries

Rubber to Metal Bondings As your custom rubber solutions partner, Martin’s Rubber can work with you to design and develop rubber to metal bondings to meet your specific requirements.

Thanks to our expertise, equipment and fine-tuned processes, we can produce a vast range of rubber to metal bonded products in small to medium volume for a variety of industrial applications. These processes can be undertaken in a number of materials, many of which we carry in stock, backed up by full support from our technical team and subcontractors.

To speak to one of our technical advisors, please feel free to get in touch by calling us on 023 8022 6330, or simply send an email to sales@martins-rubber.co.uk. Alternatively, you can find more information on bonded rubber parts here.

What is rubber to metal bonding?

Rubber to metal bonding is when rubber is mechanically bonded to a metal insert during the moulding process. The process of vulcanising rubber to metal first starts with preparing the metal inserts for production using a degreasing system to remove any contaminants from the parts, after which, a heat activated adhesive is sprayed onto the inserts and then the moulding process is undertaken. In most cases, bonding rubber to metal is beneficial for components that require the flexible properties of rubber, as well as the strength of metal.

Rubber to metal bonding can be successfully undertaken with a number of rubber compounds and the following metal inserts:

Rubbers Metallic Substrates
  • Natural
  • Neoprene®
  • Nitrile
  • Aflas®
  • FKM (Viton®)
  • Silicone
  • Fluorosilicone
  • HNBR
  • EPDM
  • Brass
  • Stainless Steel
  • Mild Steel
  • Aluminium
  • Titanium

Although most metals can be used for rubber to metal bonding, it is important to take the chemical composition of each metal into consideration and how each metal could possibly react to the type of rubber to be used in the rubber to metal bonded part. It is essential to determine the best metal type and grade for the project application, as well as the most appropriate type of rubber to use for the application.

At Martin’s Rubber, we are also able to assist you with bonding to unusual materials, such as PTFE and carbon fibre. If this is something that is of interest to you, please feel free to get in touch with one of our technical experts by calling us on 023 8022 6330, or simply send an email to sales@martins-rubber.co.uk.

More information about rubber to PTFE bonding can be found here – simply follow the link.

How to bond rubber to metal

At Martin’s Rubber, we specialise in custom solutions for rubber to metal bonding applications, in addition to numerous rubber over-moulding applications. When bonding rubber to metal, rubber materials are vulcanised, meaning that they are chemically attached to themetallic insert, which may be made of metals such as stainless steel or aluminium.

The process of creating rubber to metal bonded parts involves mechanically bonding rubber to the metal insert of your choice during the moulding process. At the start of the rubber to metal bonding process, the inserts are initially degreased, removing any potential contaminants prior to applying the adhesive to the parts. Thereafter, a heat activated adhesive is sprayed onto the metallic insert(s). Once the metals have been prepared, these inserts are then placed into each cavity of the rubber mould.

For metal inserts being encapsulated into the rubber, special chaplet pins are added into the mould to suspend the insert in the mould, therefore allowing the rubber to flow freely around the metal. It is once the actual inserts are in place, that the usual rubber moulding process can then commence. The adhesive on the metals is activated once the mould is closed and the moulding process begins, allowing the inserts to effectively bond to the rubber as part of the rubber to metal bonding process.

Our metal bonded rubber products deliver excellent adhesion every time. We can help assist you with any unique product designs and can assist you in developing your bonded rubber to steel parts.

Benefits and challenges when bonding rubber to metal

Benefits of metal bonded rubber

There are a wide number of advantages that rubber to metal bonding can offer. Some of the
benefits that rubber to metal bonded parts offer include:

  • The finished parts are exceptionally strong and durable.
  • The process offers a simple and effective method of bonding most rubber surfaces.
  • They reduce the number of parts in an assembly allows you to reduce assembly time.
  • They can help prevent errors that could typically occur at the point of assembly, including incorrect installation or orientation of a seal, as well as any potential scrapes to the seal during assembly that could damage its overall performance.

Potential challenges when bonding rubber to metal

As with any project, it is important to consider any potential challenges that could lie ahead when bonding rubber to steel parts, or other metals. In some instances, brass can be particularly problematic. This is because brass contains lead that can chemically counteract rubber bonding. Furthermore, softer, free-cutting brass materials typically have higher lead content and can be difficult to bond. Therefore, a brass material with the lowest possible level of lead content will often be more appropriate. FKM (Viton®) rubber can also present a challenge when bonding rubber to metal. These are just a handful of the considerations that our technical experts can help you with, so that you can be sure to find the rubber to metal bonded part that will meet your requirements.

Applications where rubber to metal bonded parts can be used

Rubber to metal bonding is typically used for the isolation of noise and vibration in many automotive and engineering applications. For example, rubber to metal bonded parts can be used in valve assemblies, rollers and shafts.

Other applications that employ rubber to metal bonded products include:

  • Mounts for motors.
  • General rubber to metal bonded parts for the rail and transport industries.
  • Locomotive suspension parts.

Find your rubber to metal bonded products today

If you are not familiar with the rubber to metal bonding process but think that this could be a potential solution for your project, get in touch. If you have any questions about the rubber to metal bonding process, or if you would like to discuss creating a rubber to metal bonded part, talk to a member of our team today by calling us on 023 8022 6330, or simply send an email to sales@martins-rubber.co.uk. Alternatively, fill out our ‘ask an expert’ contact form and we’ll be in touch soon.

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