| MODEL
FEATURES |
|
MOULDING
TECHNIQUE |
APPLICATION
TECHNIQUE |
ADVANTAGES |
DISADVANTAGES |
 |
 |
Flat
back,
few or no
undercuts |
One
Part
Block
Moulding |
Casting |
Quick,easy
to
perform
Self supporting
moulds
Low cost to
produce |
Limited
to
relatively simple
shapes that do
not vary much
in cross section
- Significant
material
consumption |
|
 |
Fully
structured,
few or no
undercuts |
Two
Part
Block
Moulding |
Casting |
Quick,easy
to
perform
Self supporting
moulds
Low cost to
produce |
Limited
to
relatively simple
shapes that do
not vary much
in cross section
- Significant
material
consumption |
|
|
Flat
back,
accentuated
undercuts
Fully
structured,
few or no
undercuts |
One
Part
Skin
Moulding
Two
Part
Skin
Moulding |
Casting |
Thin
section
membranes
Economic in
materials (RTV)
Large degree
of flexibility
favouring
difficult
moulding
operations
Availability
of tooling
enabling the
production of
membranes |
Longer
to
implement
than the block
moulding
method
Greater cost of
production |
|
 |
Little
or
accentuated
undercuts,
Voluminous
model on base,
On-site
reproduction |
One
Side
Impression
Moulding
(Brush
Moulding) |
Brush,
Spatula,
Spraying |
-
Possibility of
taking the
imprint on site
- Possibility of
taking vertical
or overhanging
imprints
- Adapted to
large dimension
mouldings
- Economic in
materials (RTV)
- Difficult to
perform |
-
Membrane
is not
interchangeable
between backing
moulds
- Longer to
implement
than the block moulding
method |
|
 |
Little
or
accentuated
undercuts,
Fully
structured,
Voluminous
model that is
not easy or
that can not
be moved |
Two
Part Impression Moulding
(Brush Moulding) |
Brush,
Spatula,
Spraying |
-
Possibility of
taking the
imprint on site
- Possibility of
taking vertical
or overhanging
imprints
- Adapted to
large dimension
mouldings
- Economic in
materials (RTV)
- Difficult to
perform |
-
Membrane
is not
interchangeable
between backing
moulds
- Longer to
implement
than the block moulding
method |
|
|
