What is plastic injection moulding?

Plastic injection moulding is the most widely used technique for processing plastics.   Many everyday products like crates, flowerpots, electronic parts, car or machine components, packaging… are made using this method.  

At Didak Injection, we have years of experience with injection moulding and produce products and components daily for various industries.   But how does plastic injection moulding work?   What are its benefits?   We’ll explain it below.  

Plastic injection moulding is a shaping technique for end products in plastic.   The first step is designing the product, including determining the plastic composition.   A mould is then created and shaped like the desired product.

The end product’s quality is largely determined by the quality of the mould, which is custom-designed for each project.   Once an efficient mould is made, large volumes can easily be produced.

During injection moulding, the plastic is melted and injected under high pressure into the mould.   After evenly cooling, the end product can be removed from the mould.  

Advantages of plastic injection moulding

One advantage of injection moulding is design freedom.   Due to the high pressure, complex details can be formed—something more difficult or expensive with other methods.

Injection moulding is a cost-efficient production method.   Although preparation (like mould creation) takes time, the actual moulding process is fast.   Large quantities can be made quickly, making it economically viable.

Another benefit is consistency in shape and quality.   Because the process is automated, the chance of defects is very low.   This ensures that finished products are consistent and accurate.  

Different techniques

Besides traditional injection moulding, various other methods can be used.   One example is 2K injection moulding, where two types of plastic are integrated into one product—or multi-component injection for combining materials with different properties, colours, or hardness levels.

 Another technique is In Mould Labelling (IML), where a label (printed plastic film) is placed into the mould and fused with the injected plastic.   This creates a product with a fully integrated label.   This can be either a commercial message or a functional feature like a barcode.

Gas-assisted injection moulding is another method.   After partially or fully filling the mould with liquid plastic, an inert gas is injected under pressure.   This creates a hollow wall. The technique offers extra design freedom. Material savings and added strength are additional benefits.

The possibilities of plastic injection moulding are endless.   Still have questions or have specific requirements for your project?   Feel free to contact us at sales@didak.eu—we’d love to help.  

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