Static electricity causes unique problems to injection mouldings which have a high surface-to-weight ratio. These include hollow, thin-walled mouldings such as disposable syringes and other medical products.

Industry: Plastics
Static Issues with Lightweight Injection Mouldings - Select a problem:

Mouldings can adhere to the toolface when ejected, instead of dropping into the collection system. The large surface area of the moulding gives a relatively high static charge and a strong attraction.

Fraser 5000/5100 Air Knives, blowing ionised air down from the top of the tool when opening, can neutralise the static attraction and assist with ejection.

Small plastic components often have enough static charge to stick to the transport belt instead of falling into a collection bin. A short range 24 V DC static eliminator, such as a 3024F, positioned at the end of the conveyor can be enough to reduce this attraction.

More difficult cases may require the addition of a gentle ionised airflow to encourage the release of the components from the surface of the conveyor. The 1250 Air Bar combines static elimination with air assistance and can be a better solution.

The individual charges from a high number of small plastic mouldings in a collection bin will accumulate. These can cause shocks to operators, attract dust and can even cause the products to jump out of the bin.

A short range anti-static bar on the conveyor is not efficient as the product charge couples with the conveyor and is unavailable for neutralisation. A 3024L or NEOS 12L medium range DC static eliminator positioned at the end of the conveyor and above the collection bin will neutralise the static charge.

2010 and 2050 Ionised Air Blowers are also used successfully.

Lightweight Moulding

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