CHOICE OF MATERIALS - SCHOOL PRODUCTION LINE
QUESTIONS AND POSSIBLE ANSWERS
V. Ryan © 2011
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Name one of the materials you intend to use in the production of your product. | |
Perspex | |
Explain why you have chosen your selected materials. The key words / phrases may help you answer this question. | |
STRONG - INEXPENSIVE - TOUGH - RANGE OF COLOURS - EASY TO CUT - EASY TO FILE - CAN BE POLISHED - NATURAL FINISH - CAN BE VARNISHED | |
Perspex has been chosen because it is lightweight, comes in a range of colours (including transparent and translucent) and it is relatively easy to cut and shape. It can be cut on a fretsaw or by hand and filed to a smooth finish. When polished on a polishing machine, a high quality finish is produced. Perspex is reasonably cheap and readily available. All this makes the material suitable for young children to use, on a small production line. | |
STAGES OF MANUFACTURE | |
With notes and diagrams explain how you would make the product. Explain how quality checks could be made at each stage of manufacture |
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The perspex front is protected with masking tape and the curves drawn
on with a pencil. QUALITY CHECK: The accuracy of the curves is checked with a circle template. |
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2. The MDF back is marked out with a pencil. A card template cut to the correct shape is used for this purpose, QUALITY CHECK: Once the shape is drawn on to the MDF the card template is used a second time to check the accuracy of the curves. |
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3. A fretsaw is used to shape the perspex and MDF. QUALITY CHECK: Card templates are used to check the accuracy of the cut shapes. |
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4. The perspex is through filed, draw filed and finally smoothed with wet and dry paper. Glass paper is used in the same way to produce a smooth finish on the edges of the MDF. QUALITY CHECK: A visual check of the surfaces is carried out, to ensure that they are not scratched or damaged. |
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5. The perspex is polished on a polishing machine. QUALITY CHECK: Visual check to ensure the surface is polished to a high degree. |
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6. A pre-made shape, manufactured from vinyl is cut on a vinyl cutter. QUALITY CHECK: Visual check for faults and imperfections. |
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7. The vinyl shape is pressed on to the MDF back. The front base and back are assembled using industrial standard double sided tape. QUALITY CHECK: A visual check followed by a strength test to ensure that the assembled letter rack stays together. |
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