Injection Moulding

As with dip moulding, a liquid or melted plastic is used in the injection moulding process. Likewise a mould is a required element of the process. The melted plastic is injected into the mould at a high pressure and the mould itself is constantly cooled so that the heated material will adhere to the cavity walls forming the part. As the process finishes, the mould opens and ejection pins within the mould eject the newly formed part from the mould.

The mould or mould plates are actually two pieces or two halves of a whole. Each half contains at least one cavity and often more than just one. moulds are typically made of metal, usually steel or aluminum, but the choice is often based on the economics. Steel costs more, but lasts longer. Aluminum costs much less, but does not carry as long a lifespan. The size of the mould, the number of cavities, anticipated tool longevity all factor in on the cost of a mould.

Materials - Low-density polyethylene is the most common material used in the production of our StockCap injection product lines. There are many other materials used in the process and since the use of injection moulded parts is so widespread, ranging from combs, toys, electronic housings, body panels of automobiles and appliance parts, the choice of material is dependent on the end use.

Engineering and Prototypes - Not only do we have over 50 years of design experience, but we utilise some of the most sophisticated design and manufacturing software, Pro-Engineer, to seamlessly integrate the tooling fabrication process. Our engineers have designed parts ranging from our standard styles to more complicated engineered custom parts made to solve some of the most difficult problems. Within the scope of our injection moulding process alone, we have developed thousands of parts.

After we receive your specifications, our engineering staff utilises their expertise to explore all possibilities in determining the best material and the best process for the project. Our goal is to design your part in the most cost effective manner and to design it to deliver the highest level of performance required.

We are able to provide prototypes for engineering and marketing tests and although technology has improved the precision-machined process used in forming moulds, prototypes can still take time and usually come with a price. Equipment - Various styles of machines or presses hold the mould during the process. Injection moulding presses are rated by the amount of pressure the machine is capable of exerting on the moulds which keep them closed during the injection of the heated materials.

The mould plates are mounted onto the machine, or press, and the material is injected into the mould flowing into the cavity through various channels called runners. The heated material hardens on to the cool plate taking on the shape of the mould.

Our Specialty - We stock many standard injection moulded parts, our prices are very competitive and our design capabilities are unlimited.

Benefits of Injection Moulding

Injection moulded parts are often the best choice for complex, high volume products that require tight tolerances. Our engineers will work with you to design a plastic injection moulded part with the lowest tooling cost in the industry.

 

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