EXAMINATION QUESTIONS - 4
V. Ryan © 2008-2017
1. Materials such as polystyrene, nylon, polypropylene
and polythene can be used in a process called injection moulding. These
are thermoplastics - this means when they are heated and then pressured in
a mould they can be formed into different shapes. |
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STAGE ONE: USE OF CAD (COMPUTER AIDED DESIGN) | ||
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STAGE TWO: INJECTION MOULDING |
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STAGE THREE: QUALITY FINISHING |
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The picnic furniture seen below has been manufactured using mild steel flats and rectangular section steel tube. The parts have been primed and painted. |
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2. Why is it necessary to paint the steel? | ||
3. What heat process could be used to permanently join the square section tube to the sheet steel identified as ‘A’? | ||
HEAT PROCESS: | ||
4. Handling hot metal can be very dangerous and result in serious injury. Complete the table below. | ||
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