Questions

1.    Choose 2 machines that you used in the fabrication of your desk tidy. With these machines in mind, outline WPH&S considerations that must be adhered to when using these machines. Include photographs of your chosen machines (OnGuard may be an excellent resource for this question).

Band Saw-

Before using a band saw you should:

•   Read the owner's manual carefully.

•   Make sure you understand the instructions before attempting to use any tool or machine.

•   Learn the applications and limitations before use.

•   Securely anchor the band saw to the floor (or a workbench of appropriate height) to reduce vibration.

•   Refer to Woodworking Machines - General Safety Tips for general safety precautions.

When using the band saw you should:

•   Wear safety gear (safety glasses, closed in shoes etc.)

•   Put hair back if needed.

•   Do not put to much pressure on the blade with the wood.

•   Stop machine straight away if there is any uneasy sounds

•   Keep the floor around a band saw clean and free of obstructions or clutter.

•   Keep the machine properly oiled and serviced.

•   Do not remove sawdust or cuttings from the table by hand or with compressed air. Use a stick or brush.

•   Do not leave a saw running unattended. Turn off the power and make sure the machine has stopped running before leaving the area.

Strip Heater-

Before using a strip heater you should:

•   Read the owner's manual carefully.

•   Make sure you understand the instructions before attempting to use any tool or machine.

•   Learn the applications and limitations before use.

When using strip heater you should:

•   Wear safety gear (safety glasses, closed in shoes etc.)

•   Put hair back if needed.

•   Wear leather gloves.

•   Do not touch while turned on as it is hot.

•   Ensure you turn off device when done using it.

2.  The material you are using for your desk tidy is called Polymethylmethacrylate (ACRYLIC). It has specific properties and uses.  Choose 2 other common polymers and in table form give their industrial name, common name, properties and uses.

	Silicone	Liquid Crystal Polymer
Industrial name	Silicium	Liquid Crystal Polymer
Common name	Silicone	Liquid Crystals
Properties	-Low thermal conductivity -Low chemical reactivity -Low toxicity -Thermal stability -The ability to repel water and form watertight seals -Does not stick to many substrates, but adheres very well to others, e.g. glass. -Does not support microbiological growth.	-Come in a variety of forms from sinterable high temperature to injection moldable compounds.
Uses	Used in sealants, adhesives, lubricants, medical applications, cookware, and insulation.	electrical and mechanical parts, food containers, microwaves.

3.  Extrusion, injection moulding, compression moulding, vacuum forming and laminating are examples of common manufacturing processes used with polymers (Plastics). Choose one process and with the use of diagrams and bullet points outline the process.

Vacuum forming-

1.    A sheet of plastic is heated to a forming temperature.

2.    It is then stretched onto or into a single-surface mold.

3.    Then it's held against the mould by applying a vacuum between the mould surface and the sheet.

4.    Lastly, it is left to set so that it stays firm.

4.  Extension Work - Using processes acquired from your maths lessons, calculate the amount of acrylic sheet that your FINAL desk tidy represents. Show all calculations; answer needs to be in square metres.

Rule= length x width = answer^2

Base- L 20 cm x W 20 cm

           = 400 cm^2

iPod holder- L 10 cm x W 13 cm

                      = 130 cm^2

                      L 7 cm x W 6 cm

                      = 42 cm^2

Pencil holder- L 15 cm x W 10 cm

                         = 150 cm^2

Bowl- L 14 cm x W 14 cm

           = 196 cm^2

Total= 918 cm^2

Meters= 918 cm / 1000 = 0.918 m^2

Therefore, my desk tidy was made up of 0.918 m^2 worth of acrylic sheet.