Specialists in Injection Moulding

Posted on: 22nd Oct 2018

PolyGlobal are specialists in the highly skilled process of injection moulding. The Wakefield based solutions provider has been supplying critical industries across the world with injection moulded components for over 30 years.

Injection Moulding

Injection moulding is the most commonly used manufacturing process for the high volume production of identical plastic parts.

Image of injection moulded parts

Injection moulded parts are very specifically designed for the process. The design of the part along with material selection, the design of the mould and the properties of the moulding machine are taken in to consideration.

Injection moulding is a highly versatile manufacturing system with countless design possibilities. Due to the flexibility and versatility of the process, the applications of injection moulded parts are immeasurable. Typical solutions and applications however include buffers, bushes & shock absorbers, nozzles, star wheels and sealing solutions.

It is an extremely reliable and efficient process. Automatic 24 hour cycles and the option of multi cavity tools allow PolyGlobal to meet the high volume demands of their customers.

PolyGlobal’s moulds, designed and manufactured by their own experienced toolmakers, are subjected to extremely high pressure, facilitating much more detailed and complex parts than other manufacturing processes.

Injection Moulding Cycle

The injection moulding process involves molten plastic materials being forced into a mould cavity.

Raw material in pellet form is fed through a hopper into a heated barrel. This material is then heated to become molten. The material is fed through a check valve and collects as a volume known as a “shot”. The “shot” is the volume of material required to fill the mould cavity for the required part including shrinkage allowances. When the shot has gathered, the material is forced at high pressure and velocity into the mould cavity. Once the cavity is filled, a holding pressure is maintained to compensate for material shrinkage. When the part is sufficiently cooled, the mould opens and the part is ejected.

Image of the injection moulding process

Injection Moulding Materials

PolyGlobal collaborate closely with their raw material suppliers to offer a diverse range of raw materials suitable for injection moulding. This has led to their injection moulded parts being used across all industrial sectors.

PolyGlobal’s library of materials include Polyurethane, Nylon, Polypropylene, TPE and TPR. These materials offer widely varying properties and characteristics making them suitable for a vast range of solutions from disposables through to precision components.

Specialist additives can be incorporated including but not exclusively UV stabilisers, flame retardent, metal detectable and anti static. Injection moulded parts are available in a wide range of colours.

Image of raw material used for injection moulding

PolyGlobal are continually developing their range and are becoming increasingly involved in material testing enabling them to offer more detailed technical information and advice to both new and existing customers.

Further information on the material options offered by PolyGlobal including technical data sheets are available on their website.

Contact PolyGlobal via marketing@polyglobal.co.uk with any enquiries or for further information.

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