17
3. Wood and its derivatives
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Hinges
Hinges have two separate wings joined by an axis which
allows them to move.
Glue
There are different types of glue, each
one with different characteristics.
Hinge
Glue gun
: An electric machine that you put
a solid thermoplastic stick into.
When we plug in the gun, the resistor
melts the glue.
Apply
38.
Design and make a wooden key ring following the appropriate process.
a)
Make a list of equipment and tools you will need and plan the project.
b)
At the end, write a report describing all the steps you followed to make
your key ring.
Adhesives
Contact adhesive
: Sticks immediately.
Wood glue
: Takes 20 minutes to set.
Epoxy glue
: The two substances
are mixed in the same proportion.
Setting times is between 20 minutes
and one hour. Very resistant to water.
Assembly joints
Before assembling the pieces you have to shape the piece where they join correctly.
Finger joint
Dowel joint
Full dado / housing joint
Mortise-and-tenon joint
Dovetail joint
5.9.
Painting
This protects and decorates the
wood. You can use oil or acrylic paint,
lacquer, enamel, varnish or stain.
How to paint wood
1.
Check that the surface is smooth.
2.
You should use a primer first so you
don’t use too much paint later.
3.
When the wood is dry, sand the
surface.
4.
Always apply the paint or varnish in
the same direction, with a paint brush.
5.
You should apply several
coats
14
of
paint to get a good finish and let the
paint dry properly between each coat.
6.
When you’ve finished painting, close
the paint tins and clean and dry the
brushes.
Understand
37.
What are thehairsofpaintbrushes
made of nowadays? What were
they made of before?
Paint brushes and a roller
14
coat
:
a layer of paint
❚
To make an object from
wood you have to follow
a series of operations:
measure
«
draw marks
and lines
«
cut and saw
«
drill
«
carve and plane
«
sand
«
join
«
paint.
❚
Each operation requires
the use of equipment
and tools which you have
to use following certain
techniques.
Key concepts
ADVANCE EDITION
