Using the 'Equipment and Processes' section on this website, answer the following injection and blow moulding questions:

1. Complete the diagrams by adding missing words and parts.
2a. Draw a Flowchart, representing each stage of injection moulding and blow moulding. Add quality control points and include recycling.
3a. Explain why recycling is important
3b. Draw a suitable recycling logo.

A. __________ of plastic powder (polystyrene, nylon, _____________ and polythene) are poured or fed into a hopper which stores it until it is needed.

B. The ________ is turned on. This  warms up and melts the granular plastic. A ________ turns a screw thread which pushes the granules along the heater section causing it to change to a________.

C. The liquid plastic is forced into a mould by ___________.

D. __________ air is ‘blown’ into the mould. This forces the liquid plastic against the sides of the ________. In this example it forms the shape of a plastic __________.

E. The plastic is allowed to _____ and the mould is ‘_____’ and the plastic bottle removed. The entire process is _________ hundreds or thousands of times.

2a. Forming Plastics through Blow / Injection Moulding - Flow Chart

Complete the following flow chart or draw a new version.

Click here for sample answer to recycling questions.

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