Plastic injection moulder in action

Plastic Injection Moulding Services

Injection moulding, along with extrusion, are the main processes for producing plastic products. These are the most popular way to produce any plastic article due to its fast process and ability to produce large numbers of identical products for a relatively low cost.


The majority of thermoplastics can be processed through injection moulding. Plastics are a very unique group of materials, but they exist in many different physical forms. They range from very soft and flexible to very hard and rigid and can be made into pretty much any colour you would like. All plastics are part of a family of materials called polymers. This is the chemical term for a substance which is made up of many many molecules all strung together to form long thin chains.

At Plastic Supplies Dudley, we use a wide range of different materials including:

  • ABS - Acrylonitrile Butadiene Styrene.
  • HDPE - High Density Polyethylene.
  • LDPE - Low Density Polyethylene.
  • PP - Polypropylene.
  • PA - Polyamide (Nylon).
  • POM - Polyoxymethylene (Acetal).
  • TPE - Thermoplastic Elastomer.
  • TPU - Thermoplastic Polyurethane.


There are two main functional components of a injection moulding machine. These consists of a clamp unit and an injection unit.

The clamp unit has 4 main roles within the machines. These are:

  1. Holding the mould halves securely in place and accurately in alignment.
  2. Opening and closing the mould quickly but in a controlled manner.
  3. Keeping the mould closed while under very high pressure.
  4. Ejecting the component through the use of the built in mechanism.


The injection unit is the part of the machine where the material is contained to be moulded. The basic functions of this unit is to:

  1. Convey the material
  2. Heat the material until it is throughly plasticised.
  3. Pressurise the plasticised material.
  4. Inject the plasticised material into the mould.

For all your plastic injection moulding requirements

Call 01384 77569