Injection mould for Lego bricks, 1988.

Ward, Phil

 
Injection mould for Lego bricks, 1988.
4 0 c m
 
40cm
actual image size: 32cm x 32cm

Description

As Lego shapes are complex, casting is the easiest way of producing them. They are injection moulded using a type of plastic called ABS (acrylonitrile butadiene styrene) which is melted and injected into the mould by a hydraulic plunger. This has a force equivalent to 700 bags of sugar balanced on the end of your finger and a single mould can produce 2880 Lego blocks an hour. Made by the Lego Group.

© Science Museum / Science & Society Picture Library

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