Connexions Plastics Ltd

Plastic Injection Moulding

Phone Number: 01455 841 182

About injection Moulding Design

  • Posted by:
  • Admin
  • Tags:
  • injection Moulding Design
  • Posted date:
  • 11-06-2017
About injection Moulding Design

About injection Moulding Design

Plastic has become part of our daily lives. Plastic production is a low cost method. Productions which are needed in mass could be processed fast and easily. Since we can't do without plastics, it is important to know the process plastic manufacturing. 

Design Process

The process utilised to change raw materials into functional plastic. It  is called injection moulding. This procedure is used to make  bespoke parts or products.  This is from  both thermosetting plastic and thermoplastic materials.

These are melted, designed as well as cooled so as to be released for use. This process is widely and commonly utilized to make a variety of products or parts. These are normally for the car industry, healthcare equipment and electrical components. 

The injection process takes account of four steps such as:


At this phase, the mould is held firmly by the hydraulically powered clamping unit.  This pressed on the mold and exerts force to stay it firmly closed while being injected.


The polymeric material that is accessible in powder type is moved into the injection moulding machine. This is done through the injection part for melting. Once molten, it is swiftly injected into pressure packs under a definite temperature.


The molten material hardens fast after a predetermined cooling time. As the plastic cools, it takes up the shape of the preferred part. The cooling procedure is oftentimes affected by reduction.  This is corrected at the injection phase where additional material is permitted to flow into the mould.


This utilises a specific device to press the part out of the mould. Force should be exerted since the material adheres to mould.

The moulding design puts into consideration the design of the component. This takes account of the draft, the thickness of wall, radii as well as corners, ribs and the bosses and of course the weld part lines. 

The draft explains the level of a taper required to let the ejection of the moulded part. The ribs are needed to add the formation strength of the design. The bosses position, mount and gather the moulded parts. The radii assist to shun sharp corners and also assist to make the part stronger.

The benefits of plastic injection take account of the capability to keep up high level of productions. This offers high level of tolerance in the products and lower the cost of labor since the bulk work is machine based. 

In addition, there's little waste and so the scrap expenses are lower. The main drawback of plastic injection moulding is the attainment of the gear that is normally very expensive.