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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

The assistance of an injection moulding company is needed, to work alongside a buyer that specialises in the manufacture and supply of fire detection systems. They spend over £10,000 a year on outsourced processes and have an ongoing need for three different parts, with an immediate order to place and an annual forecast of a substantial size. The successful supplier is required to provide both the tooling and the finished items.

Plastic & Rubber-Injection Moulding

This is a fresh opportunity for injection moulding suppliers to work with a company that operates within the energy sector. The client's annual outsourcing spend exceeds £200,000 and they are currently looking to work with an organisation that can offer the production of two new parts, which are undergoing final evaluation prior to launch in September. These components have previously been 3D printed, but now a final supplier is sought to manufacture these parts on an ongoing basis.

Plastic & Rubber-Injection Moulding

Injection moulding of a new part is required, on behalf of an electronics buyer with a £20,000 spend on outsourced plastic and rubber processes. This is an opportunity which could lead to ongoing work, making it a brilliant chance to supplement your long-term customer base.

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.