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Injection moulding |
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Injection moulding is a technique which is used for the piece-by-piece mass production of plastic products with both simple and geometrically complex shapes: containers, bearings, spacers, screens, cabinets, strips and much more. The size can vary from a few micrograms up to 30kg or more.
When thermoplastic is injection-moulded, the plastic material is melted through heating and mechanical working. It is then injected into a tool, which is mounted in the injection moulding machine. This tool is a closed shape with a cavity of the same shape as the product or products which is being manufactured. The tool is kept at a temperature low enough to enable the plastic mass to harden. |
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| Injection moulding |
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Keeping the plastic mass under pressure prevents any return flow and the tool is topped up to compensate for the wastage which occurs as the material cools. This enables considerable accuracy to be achieved. The product is cooled until it is sufficiently solid to enable it to be extracted from the mould, either manually or automatically. The manufacturing time can vary from less than one second up to a couple of minutes depending on the material thickness and the quality requirements. No finishing work is normally carried out on moulded products. |
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| Injection moulding tool |
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Injection moulding is primarily carried out using various types of thermoplastic but with suitable equipment hard plastic, elastomers, composites and foam plastic can also be injection-moulded.
PRIMO has injection moulding equipment for products weighing up to 3kg. |
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| Examples on injection moulding forms |
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For more information or if you have any questions concerning injection moulding, send an e-mail to: info@vestplast.dk or telephone +45 75 29 91 77. |
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