The injection moulding process

APL Plastic Injection Moulding & Insert Moulding

Injection moulding is a widely used manufacturing process for creating a variety of plastic components, from the smallest screw cap for medicine bottles to medical device components to entire body panels for vehicles.

What does the injection moulding process involve?

The injection moulding process uses a series of precision processes to take the plastic component from design to creation. Firstly, plastic material in the form of granules is melted until the material is soft and can be injected into a mould. Once cooled, the mould can be opened to release the copied part. This is a very simplified explanation. A more detailed examination of the moulding process consists of the following steps:

  • Clamping – the moulding machine’s metal plates press the mould together under firm pressure.
  • Injection – the molten plastic, melted by pellet form in the barrel of the moulding machine, is injected under pressure into the mould.
  • Dwelling – once the molten plastic is injected into the mould, more pressure is exerted to make sure all cavities of the mould are filled.
  • Cooling – the plastic parts of the mould are left to cool and solidify within the mould.
  • Opening – the moving metal plates (or platen) are separated from the fixed platen to separate the mould tool.
  • Ejection – ejection of the mould is then completed by the use of rods, a plate or an air blast.

APL injection moulding

Automatic Plastics are trusted injection moulding experts within the UK and Ireland. APL invest in the most up-to-date moulding equipment and machinery and specialize in using a process that is extremely efficient and highly productive.

Injection Moulding Services for the Automotive Market

APL can produce a variety of products across all industries, from small items like plugs, toys and medical containers to large items such as product housings, crates and automotive components.

We excel in  providing plastic injection moulding for medical device components and the Pharma and Automotive industry.

For sales enquiries in the UK contact Automatic Plastics on +121 2850848 or email Our friendly and knowledgable staff will help you with your queries and talk you through our manufacturing process. You are also welcome to come and visit our facilities and see our state-of-the-art injection moulding process for yourself.