MOTOR

POLYPROPELYENE GRANULES

HEAT

HEAT

MOULD

ARCHIMEDEAN SCREW

HOPPER

COMPRESSED AIR

1. GRANULES OF POLYPROPYLENE ARE ADDED TO THE HOPPER.

2. THE GRANULES FALL ON TO THE ARCHIMEDEAN SCREW WHICH PUSHES THEM

THROUGH THE HEATER. 3. THE GRANULES MELT AND BECOME

MOULDABLE. 4. AS THE MOLTEN POLYPROPYLENE IS FORCED INTO THE MOULD, A ‘JET’ OF COMPRESSED AIR

FORCES IT TO THE OUTSIDE WALL OF THE MOULD, FORMING THE BODY OF THE

CONTAINER. 5. WHEN THE POLYPROPYLENE COOLS, IT CAN

BE REMOVED FROM THE MOULD.

MOULDING UNIT

BARREL ANDARCHIMEDEAN

SCREW

DRIVEUNIT

HOPPER

INJECTION MOULDING

POSTER - INJECTION MOULDING

Can be enlarged to be a poster or simply used as an information sheet.

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www.technologystudent.com © 2017https://www.facebook.com/groups/254963448192823/WORLD ASSOCIATION OF TECHNOLOGY TEACHERS V.Ryan © 2017

For more information on injection moulding: http://www.technologystudent.com/equip1/inject1.htm