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Process: Injection Moulding

Overview

injection mouldingInjection moulding is a plastic moulding process in which plastic components are moulded under high pressure.

The first step in the injection moulding process is to manufacture a mould. The mould is unique for every component, but can be used many times. Some moulds has service life of many hundreds of thousands parts. Normally, the mould can be manufactured using machining or using wire or spark erosion.

When the mould is manufactured, it is clamped in the injection moulding machine. The clamping unit simply keeps the mould together. In the other end of the machine plastic granulates are fed into a heated cylinder which forces the plastic, which melts, into the mould under pressure. When the plastic hardens, the clamping unit opens so the final component can be removed.

There is a few aspects that determine which injection moulding job is suitable for a certain machine. The most important factor is the press force, simply the force with which the melted plastic is forced into the mould. A too weak force will end in a badly produced component, and a too strong force is uneconomical. There are also other factors to weigh in, such as length, width and depth, appropriate temperatures and cooling times. Injection moulding is suitable for medium to large sized batches as the initial cost for a mould is high but the the cost for every component is low.

Picture: Frontier Design Ltd

Post project to suppliers with Injection Moulding capabilities

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Injection Moulding projects for quote

Plastic & Rubber-Injection Moulding

A range of parts are required to be manufactured for use within the medical/scientific industry. Although this buyer - who spends over £120,000 per year on all outsourced processes - has previously had these parts machined, they would now like to have them injection moulded. This enquiry facilitates an opportunity for suppliers to provide their input regarding optimum manufacturing methods, as well as the production of these components on an ongoing basis.

Plastic & Rubber-Injection Moulding

This medical company, who spend over £200,000 per year on all outsourced plastic and rubber processes, is looking for a new injection moulding supplier to assist them with the manufacture of a new part. This enquiry is for ongoing work with weekly batches required, making this an ideal opportunity to add a new long-term customer to your portfolio.

Plastic & Rubber-Injection Moulding

Injection moulding specialist is needed, for this start-up company who have developed a new product. They have manufactured a prototype and tested it, they are now ready to start production and are seeking a suitable supplier for this.

Plastic & Rubber-Injection Moulding

This buyer from a manufacturer of doors and windows with an annual spend of £100,000 on all plastic outsourcing are looking for a supplier to quote on the attached corner cap.

Plastic & Rubber-Injection Moulding

This buyer from a manufacturer of laboratory equipment, with an annual spend of £5,000 on all outsourced plastic work is looking for a supplier to help improve the quality of the attached box.

Plastic & Rubber-Injection Moulding

This designer of innovative pet products is looking for a supplier to quote for the tooling and manufacture of a new product to their range. The client advises that their current range is stocked in over 1700 retail outlets across a number of countries and is expecting this product to join them.