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Injection Moulding Characteristics

Please acknowledge the following manufacturing characteristics before proceeding.


Like all injection moulded products, this manufacturing process includes some very common but notable characteristics. Sprue marks, ejector pin locations, witnessing, weld lines and apprentice marks are a natural part of the injection moulding process. These characteristics typically tend to be on non-visible or interior surfaces which aren’t seen, however in translucent parts, where interior surfaces are more visible, they can be more noticeable. We find these characteristics necessary to acknowledge, so that we can be transparent with you and help you proceed with an informed and educated purchase.

NOTE: These photographs have been taken using macro photography and the images have been enhanced to emphasise the characteristics.

Sprue Marks

Sprue marks signal the entry point where liquid material is introduced into the mould.

Ejector Pin Locations

Ejector pins help with ejecting or releasing the plastic part from the mould and leave marks at these contact points. 

Witnessing

Witnessing will occur along a parting line, where different parts of the mould join together.

Apprentice Marks

Minor surface imperfections can arise when there are small nicks and bumps which are part of the mould.

Weld Lines

Weld lines appear where injected molten plastic within the mould flows and joins together.
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(ABN 65 592 475 152)