Year 9
Technology Work
Structures
Are
designed
to
carry
loads
and
withstand
forces
without
failing.
Therefore
stronger
structures
can
Resist stronger Forces
Frame Structures
A
frame
structure
is
a
network
of
ties
and
struts
joined
together.
Ties
resist
tension
and
struts
resist
compression. Examples of frame structures include
Systems and Control
A
system
has
various
parts
that
work
together
to
perform
a
set
function.
Systems
can
be
broken
down
into
these
simple
stages:
The
input
is
a
signal,
change
in
the
environment,
component
or
process
that
starts
the
system
off.
E.g.
the
dough
fed
into
a
bread
machine
or
a
button
on
a
phone
being
pressed.
The
process
is
what
happens
to
the
input
to
change
it
into
an
output.
Information
from
the
input
controls
the
output.
E.g.
the
skills
and
labour
of
the
workers
in
a
factory
or
the
working
of
a
computer
processor.
The
output
is
the
result
of
the
system.
E.g.
the
final
product
on
a
production
line
or
the
sound
of
a
fire
alarm.
Mechanical Systems
They are used to change the type or size of a motion and
force. What kinds of motion?
Types of Mechanisms
One
of
the
most
common
mechanism
is
the
Lever.
There
are
three
types
of
levers
and
an
example
of
a
first
class
lever
is
the
See
Saw
that
you
would
often
see at a child’s playground.
Other
mechanisms
are
Gears,
Pulleys
and
Cams.
In
most
of
the
items
that
we
see
around
the
world
that
have
some
kind
of
movement
will
have
one
or
some of these mechanisms.
Pulley systems:
A Pulley system is used
on the Buggy project
and each pully is linked
by the use of an Elastic
Band.
Mechanisms - Pulley
Pulleys
can
be
used
to
help
lift
objects
that
are
quite
heavy,
too
heavy
for
a
person
to
lift
on
their
own.
By
using
the
pulleys
illustrated
a
user
can
pull
down
and
lift
an
object
upwards.
By
increasing
the
number
of
pulley wheels the effort required to lift an object is less.
Mechanisms - Other
Chain
and
Sprocket
-
These
are
found
on
bikes.
Two
sprockets
(toothed
wheels)
are
linked
with
a
chain
(made
up
from
loads
of
links).
Combined Systems - Cranes are systems that lift and move heavy loads. They use pulleys to lift the
load. The top part of the crane rotates — this is done using gears. The arm of the crane is a lever — the
load is balanced with a concrete block.
Isometric Drawing
Evaluation
When
evaluating
a
pratical
the
following
needs
to
be considered
1)
Describing
what
went
well.
There
are
many
aspects
to
your
practical
and
all
those
that
you
did
well
at
should
be
mentioned
and
described
in
detail.
2)
There
are
some
aspects
that
you
found
difficult
and
these
to
must
be
thought
about
so
that
next
time
you
can
look
to
do
better
than
what
you
achieved this time around.
3)
Practical
work
involves
many
techniques
and
skills
that
will
be
used
again
so
its
important
to
note
them.
4)
These
Techniques
and
Skills
can
be
hard
to
master
so
sometimes
they
need
to
be
practiced
so
that better outcomes are achieved.
5)
Once
the
practical
is
completed
its
important
to
look
at
it
again
and
think
about
how
it
could
have
been done better.
6)
The
Teacher
will
often
make
suggestions
and
these
need
to
be
noted
as
they
will
help
you
to
get
better and achieve better outcomes.
Product Analysis
Product
analysis
is
the
process
of
looking
very
carefully
at
a
product
to
learn
how
it
is
made,
what
it
is
made
from
and
how
it
is
used.
Undertake
a
Product
Analysis
of
the following images. Click the images to enlarge them.
Questions:
1) Name the three parts of the pencil sharpeners
in Photo. 1.
2) What is the blade made of?
3) State how the blade is fixed in place.
4) Explain how the blade is prevented from
moving.
5) Explain why there are two blades in the pencil
sharpeners.
6) The pencil sharpeners in Photos 1 & 2 have
sloping tops. Explain why.
7) The pencil sharpener in Photo 3 has concave
sides. Explain why.
8) Describe the shape of the hole in pencil
sharpeners.
9) Explain why some of the corners on the
wooden pencil sharpener are rounded off.
10) The pencil sharpeners in Photos 6 - 9 have
transparent shaving holders. Explain why.
Polymorph Material
Polymorph
is
a
thermoplastic
(smart)
material
that
can
be
shaped
and
reshaped
any
number
of
times.
it
is
normally
supplied as granules that look
Other Thermoforming Processes
When you heat thermoplastics, they become soft
and pliable. You can make loads of shapes out of
plastic using thermoforming processes.
Vacuum
Forming
A
vacuum
forming
machine
heats
a
plastic
sheet
until
it’s
soft
and
then
creates
a
vacuum
underneath
it
(this
means
the
air
pressure
is
removed).
Air
pressure
on
top
of
the
plastic
then
pushes it down over the mould.
Polymorph Project
like
small
plastic
beads.
In
the
classroom
it
can
be
heated
in
hot
water
and
when
it
reaches
62
degrees
centigrade
the
granules
form
a
mass
of
‘clear’
material.
When
removed
from
the
hot
water
it
can
be
shaped
into
almost
any
form
and
on
cooling
it
becomes as solid as a material such as nylon.
Press Moulding Polymorph
The
Thermoplastic
material
is
put
into
a
mould.
A
former
is
pressed
onto
it
and
pushes
the
plastic
into
the
mould.
While
pliable
at
62
degrees
and
pressure
applied
the
Polymorph
plastic
is
set
into
a
designed
shape.
electricity
pylons
and
houses
built
around
a
steel
or
wooden
frame.
Often
the
frame
is
made
up
of
triangular
shapes,
because
they’re
strong.
Using
triangle shapes in a structure is called triangulation.
Shell Structures
Also
called
sheet
structures.
The
structure
is
made
up
of
flat
or
curved
pieces
joined
together.
The
way
the
pieces
are
put
together
is
designed
to
make
a
strong,
stable
3D
shape.
Examples
include
car
bodies
made
of
metal
panels,
or
moulded
plastic
traffic cones.
Injection
moulding
Hot,
soft
plastic
is
squirted
into
a
mould.
When
the
plastic
cools
it
sets
and
can
be
taken out of the mould.
Blow
Moulding
A
sheet
of
plastic
is
heated
until
soft
and
placed
under
a
mould.
Air
is
blown
under
it,
forcing the plastic up into the mould. This process is used to make bottles and containers.
Line
Bending
(Strip
Heater)
A
metal
wire
is
heated
to
a
point
that
would
soften
the
pastic
sheet.
The
sheet
is
placed
over
the
metal
heated
wire
and
when
the
plastic
is
soft
enough
it
is
bent
to
the
shape
required.
Polymorph Handles Choose your item
that you wish to make a Polymorph Handle for
Design Specification
Once you’ve got your thought of what is to be made, you need to to draw up a list of features (design criteria)
the product you’re designing should have. This list is called a design specification.
Here’s an example of a design specification for Scissors:
Function — The product should be able to cut paper.
Cost — The Scissors should cost no more than £4 to make.
Aesthetics — The product should have a soft texture, so it’s comfortable to use.
Manufacture — The product should be easy to manufacture. Take no more than 2 hours to make.
The Environment — Care must be taken that the materials used are environmentally friendly.
Health and Safety — The product should have a safe cutting edge. Safe for children.
Evaluation
When
evaluating
a
pratical
the
following
needs
to
be considered
1)
Describing
what
went
well.
There
are
many
aspects
to
your
practical
and
all
those
that
you
did
well
at
should
be
mentioned
and
described
in
detail.
2)
There
are
some
aspects
that
you
found
difficult
and
these
to
must
be
thought
about
so
that
next
time
you
can
look
to
do
better
than
what
you
achieved this time around.
3)
Practical
work
involves
many
techniques
and
skills
that
will
be
used
again
so
its
important
to
note
them
4)
These
Techniques
and
Skills
can
be
hard
to
master
so
sometimes
they
need
to
be
practiced
so
that better outcomes are achieved.
5)
Once
the
practical
is
completed
its
important
to
look
at
it
again
and
think
about
how
it
could
have
been done better.
6)
The
Teacher
will
often
make
suggestions
and
these
need
to
be
noted
as
they
will
help
you
to
get
better and achieve better outcomes.
Electronics
1) Conductors and Insulators
2) Voltage, Current and Resistance
3) Components
4) Circuit
Conductors
is
a
material
that
basically
allows
Electricity
to
pass
through
it.
Metals
are
conductors,
Water
is
a
conductor
and
so
are
you.
That
is
the
reason
why
you
can
be
electrocuted.
Conductors
have
a
very
low
resistance
to
the
flow
of
Electricity
when compared to an Insulator.
Insulators
are
materials
that
do
not
allow
Electricity
to
pass
through
it.
Plastics
are
very
good
Insulators,
also
Ceramics
and
Rubber.
Insulators
have
a
very
high resistance to the flow of Electricity.
Voltage
is
the
Pressure
pushing
Electrons
through
a
conductor.
Voltage
is
measured
in
Volts.
Current
is
the
movement
of
Electrons
and
is
measured
in
Amperes.
A
current
of
1
Ampere
passing
through
a
conductor
in
1
second
is
roughly
equivalent
to
6.2
million,
million,
million
Electrons
passing
through.
That
is
a
lot!!
So
if
you
were
to
touch
that
wire
then
that
number
of
Electrons
could
be
going
through
you.
Scarey
thought
especially
if
the
Voltage
pushing
the
Electrons
was
240volts.
That
would
cause Death!!
Resistance
is
the
opposition
to
the
flow
of
Electricity.
All
materials
have
resistance,
even
the
best
conductors
such
as
Copper
and
Gold.
THis
resistance is measured in Ohms.
Methods of Drawing
Sketching an idea is drawn freehand in any way
that suits the idea you have. For Drawing, an idea
is drawn using drawing methods such as Oblique
and Isometric. These are 3D methods and allow
us to see three sides of an object. See below the
example of 2D and 3D
Recap
Isometric Drawing
Another method of drawing in 3D is Isometric
and shows each side shown equally. Each side
shown is displayed at an angle of 30 degrees
from the horizontal. see below
Lesson 4 - Recap of work done and have a go at drawing
a phone freehand in isometric.
Homework - Now use 2D Design to draw the same phone
Click on the link abaove to download ‘Techsoft 2D Design
version 3’ onto your computer. Then use the following
Activation Key:
This will allow you to use the software for this Year
(2020-21).
1020 FAYH HWWS GWM8 ZGDP
Lesson 5 - On 2D Design practice the more advance features
of Isometric Drawing and then have a go at drawing a house
in Isometric
Homework - On paper now and complete for HW the more
advance features of Isometric Drawing by drawing the house
in Isometric by hand
Click icon left to download Prodexktop on your computer. Click the
phone shown below to download a predesigned Circuit.
The parts shown below are what is required to be designed using
Prodesktop.
Designing the ‘Speaker Box’ with Amplifier
Curving the sides and assemblying Speaker
ProDesktop Car Challenge
for Year 9
Prizes for the best car design
To do at Home, please download Prodesktop from the following
website address.
www.mvctech.co.uk/software/setup2.zip
Once downloaded, double click and ‘Extract all’ files to a selected
Destination
Then double click ‘PTC ProDESKTOP 2000i2’ to install
Technology computer room will be available Monday, Tuesday and Friday lunchtime for those
who wish to do in School. Entries to the competition must be given as a name.des file
(Prodesktop File) emailed as an attachment to
sreynolds@melbournvc.org
Closing date: 14th December 2020
Read through safety rules and then draw a safety poster
Single Point Perspective
In 1 point perspective drawing, depth is added to a drawing
by taking lines to a single vanishing point. We normally draw a
crate first that represents the height, length and width of the
object that we want to draw. Extra lines are then drawn inside
the crate until the shape of our object is drawn feintly.
The outine of the object is then drawn darker over the feint
construction lines. The construction lines may be rubbed out
using an eraser or if they are very feint, they may be left.
Finally the drawing may be rendered by adding light, shade
and colour
Two Point Perspective
Two point perspective drawing is the most difficult method that
we normally use to illustrate products. If done well, it is also the
most realistic. In two point perspective drawing, we imagine two
vanishing points. The two top corners of the page may be used
for most purposes.
All the lines that are drawn towards the left are drawn to the left
vanishing point. All the lines that are drawn towards the right
are drawn to the right vanishing point.
Vertical lines stay vertical.
.
