Polyethylene bottles are used to contain fluids as various as milk and engine oil. A typical polyethylene bottle weighs about 30 grams and has a wall thickness of about \(0.8 \mathrm{~mm}\). The shape is 3 -D hollow. The batch size is large ( \(1,000,000\) bottles). What process could be used to make them?

a. List the function and constraints, leave the objective blank and enter 'Choice of process' for the free variable.

b. Use the charts of Figs. 7.3, 7.4 and 7.6 to identify processes to shape the casing.

Data From Fig. 7.3

Data From Fig, 7.4

Data From Fig, 7.6

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Metals, ferrous Metals, nonferrous Ceramics Glasses Elastomers Thermoplastics Thermosets Polymer foams Composites 0 000 0000 Sand casting Die casting Investment casting Centrifugal casting Forging Extrusion Sheet forming Powder methods 0 Electro-machining O Machining Injection moulding Blow moulding Compression moulding Rotational moulding Thermo-forming Polymer casting Resin-transfer moulding Filament winding Lay-up methods Vacuum bag Additive manufacture 0 0 00 0 Shaping OOOO 0 O