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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

With an annual spend on outsourced processes that tops over £1.2million, this manufacturer from the leisure industry is looking for a UK injection moulding supplier. The two attached hooks are items which are regularly ordered from overseas, although the client is keen to return their production to home soil. They would like to receive quotes for 5000 off of each part per quarter and also require the applicable tooling. Therefore, this is an opportunity to win not only the job in question, but also a new long-term customer.

Plastic & Rubber-Injection Moulding

This is an unmissable opportunity to become a long-term supplier to a well-known company within the automotive industry. Spending a massive £500,000 a year on bespoke plastic & rubber components alone, they seek the assistance of an injection moulding company that can utilise supply of a hose in large annual quantities. This enquiry forms part of a larger job for which the client is currently tendering and if successful, it will spell at least four years worth of work for the supplier they select.

Plastic & Rubber-Injection Moulding

This manufacturer of waste management solutions, seeks quotes on the attached brackets. This is a new part for the company in question and at present, they are unsure if this will be a one-off or ongoing requirement.

Plastic & Rubber-Injection Moulding

Quotes are sought for the attached fumigation wedge, which is to be injection moulded in accordance with the attached STEP file. The client outsources a massive £1.1million worth of work each year and would like to partner with a supplier who can fulfil biannual orders of this component, whilst adhering to the material specification provided. Interested parties must have the required approval in place and also provide a quotation for the applicable tooling. This is a new design, which is destined for end use within the industrial machinery sector.

Plastic & Rubber-Injection Moulding

This enquiry is not to be missed by those who are looking to supplement their long-term customer portfolio. The company behind this enquiry is a manufacturer of electronic products, who is keen to hear from injection moulding suppliers that are able to offer prices for a package of fourteen parts. There are large ongoing yearly quantities of these components available for the chosen supplier. Interested parties must be able to adhere to the client's criteria and have the available capacity to meet demand.

Plastic & Rubber-Injection Moulding

Injection moulding companies with the capacity to undertake a high-volume order are sought, by a manufacturer of products for the automotive industry. With a £200,000 a year spend on outsourced plastic and rubber processes, they have a plethora of requirements in this field, of which this project forms a part. The component in question is a cover, which is to be moulded from Thermaflex in quantities of up to 200,000 off a year.

Plastic & Rubber-Injection Moulding

This manufacturer of lighting equipment, whose annual spend across all outsourced processes exceeds £100,000, would like to work with a company that can offer injection moulding of the attached spring cover from polypropylene. This is a new part and the client is looking to secure a supplier for the production runs, that are due to commence once their prototypes have been tested. This is an opportunity for the successful supplier to grow their long-term customer base and expand on their involvement with the client moving forward, meaning that it is not to be missed by those who have ongoing capacity to fill.

Plastic & Rubber-Injection Moulding

Injection moulding suppliers are sought, on behalf of a lighting manufacturer that spends over £50,000 annually on subcontract services in this arena. They will require production of a lighting component in the near future and would like to establish contact with companies that could be interested in providing a quotation and undertaking the work. Drawings are to become available within the next few weeks. The client needs supplier input on this project and would like to hear from those that feel they can offer the required level of guidance.

Plastic & Rubber-Injection Moulding

The buyer from this research & manufacturing company is looking for a supplier to quote on the manufacture of the attached dust cover from hard TPE. They are looking for quotes on the initial 20 off samples and approximately 1500 per annum thereafter.

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.