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.
