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Different Kinds of Standard Rubber Mouldings and their Purposes


Rubber can be used in a wide range of applications and it can be fabricated to suit different requirements. Rubber moulding is the process of constructing rubber so that it can be used in a more specific application.

Below are some standard rubber mouldings and their purposes:

O rings

An O-ring can be defined as a torus or a doughnut-figured object. It is one of the simplest and most common types of seal that is used in many static and dynamic applications.

This type of rubber moulded material is primarily used for sealing purposes. O-rings are used to keep a fluid or air inside or outside of a defined space.


  •         An underwater camera uses O-rings to prevent water from entering the device
  •         Scuba regulators use them to prevent air from escaping

How do O-rings work?

O-rings are placed into a groove and squeezed between two surfaces to take up the clearance and block the pathway where a fluid or air can escape.

When putting the O-ring into the groove, the pressure that is laid upon it at one point will force it to expand in the opposite direction, helping it to seal against the wall of the groove.


A rubber mould grommet is a ring that is inserted through a hole – usually in leather, fabric or sheet metal.

Its main purpose is to prevent tearing or abrasion of the pierced material and also to cover the sharp edges of the hole.

Commonly found on:

  •         Shower curtains
  •         Shoes (for the holes of your shoelaces)
  •         Pattress boxes and cable wires
  •         Surgical devices

How do Grommets work?

A grommet is fitted into the hole of a material (e.g. sheet metal), providing reinforcement where something can pass through. This ensures that another material can be hung or pulled through the material without tearing it. It also protects the material inserted into the hole.


Rubber buffers are devices, materials or apparatus that act as shields or cushions on different vehicles. They serve as a damper and prevent any possible damage from shocks and rebounds.

They can be found in applications where shock absorption is needed, such as:

  •         General industrial machinery
  •         Construction vehicles
  •         Agricultural vehicles

How do Rubber Buffers work?

For different kinds of moving and industrial machinery, rubber buffers absorb and reduce the kinetic energy and vibration when placed in the middle section of the coil spring absorber.

When the vibration brought by the mechanical process of a vehicle is not controlled, this may result in machinery impairment which could shorten its life.

Rubber is one of the most significant products that many industries have ever known. Aside from the standard category, there can be more specific types of rubber moulded materials that can be used in different applications.

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