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August 30, 2017

The Process of Manufacturing Plastic Parts

Plastic injection moulding is by far one of the best cost-saving solutions when it comes to manufacturing plastic parts. Return on investment is something that needs to be considered very carefully before deciding which plastic part manufacturing process you decide to take on in your business.

When deciding how to obtain your plastic parts for manufacturing, it is vital that you have a clear idea of the volume of parts you will need. If your company requires lower volumes of tens or hundreds of parts per year, then you may need to consider other ways of manufacturing your parts other than plastic injection moulding. However, if your company requires larger volumes, it may be worth considering plastic injection moulding. Aside from the initial investment of the injection mould, the process can be highly beneficial to companies that warrant large quantities of parts per year and can be a great cost saving solution.

To make the decision a little simpler for you, at Moldwel, we’ve put together a compilation of the different part manufacturing processes to give you more of an idea as to which would be most relevant to your business.

Firstly, injection moulding creates parts with relatively consistent wall thickness, but with no internal voids.

If your parts require internal voids, blow moulding is another solution. It works like a balloon being blown up inside a cavity to create the shape and works on anything small with an internal void.

Thermo-forming starts with a sheet of heated plastic, vacuumed onto the form and cooled to leave the plastic in the shape of the object. Works well on objects that need specific sizes, such as lids and trays as the shape can be obtained easily whilst the plastic is heated, and cooled to retain that shape.

Rotational moulding is used for larger parts with internal voids. This process is slower but still an efficient way to manufacture larger parts in small quantities.

Finally, fabrication; used for small quantities as it requires higher labour costs. This process consists of cutting and gluing sheets together to meet your product specifications, so does take a significant amount of time and concentration.

Once you have grasped an understanding of the different processes of plastic part manufacturing, it is important to really crunch those numbers and ensure your return on investment works for your budget.