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GENERAL
PaucoPlast makes customized moulds for all kind of applications
and uses. The construction and the choice of the material depend
on the shape, the complexity, the strains involved and the ambient
temperature. Carbon can be processed as a sandwich or solid
construction.
These compounds are used for mouldings which must combine maximum
rigidity with minimum weight.
Our strength resides in the development and manufacture of high
quality moulds, prototype building and small series production.
We make the moulds to satisfy your individual wishes and criteria.
Finest processing quality and years of experience in building
complex moulds make us your expert partner for all types of
carbon processing. On request, our specialists will be pleased
to help and advise you at the design phase too.
We look forward to meeting you.
CREATING A MOULD
The customer makes the moulding using a CAD program on a PC.
The finished 3D drawing is used to drive a five-coordinate machine
tool; this machine mills the model elements from advanced tooling
material which is later used to build the original mould. This
synthetic material is rather like wood and has a surface free
from pores. As its dimensions are stable on exposure to temperature
fluctuations it is ideally suitable for model making purposes
(positive). The model is over-laminated with carbon fibre fabric
to create the negative mould.
The interior of the negative is then carefully covered with
several layers of carbon fibre fabric. A single layer has a
thickness of just 0.5mm. The carbon fibre material is generally
woven and delivered in rolls pre-impregnated in resin. This
material is known as prepreg. The way in which the fibre is
graduated determines how the fibres pass on the forces acting
on them and transfer them to other parts. The fibre direction
is vitally important here. To adjust the fibres to the mould
the material is heated with a hair dryer. This enables the fibres
to be bonded and shaped more readily.
The number of layers varies according to the area of use and
shape. Workpieces exposed to higher stresses logically require
more layers. As soon as the necessary number of layers has been
applied to the mould, the entire system is welded into a foil
and placed under a vacuum. The mould is then heated in the autoclave
under pressure to between 80 and 180ºC. During this process,
the layers are literally sucked against the mould. The high
temperatures release the resin inside the fibre and the pressure
of up to 7 bars compresses the layers. During this process the
resin sets and is combined with the carbon fibre. The mould
sets after around 5 to 24 hours depending on the resin structure. |
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PaucoPlast AG
Talstrasse 14
8852 Altendorf
Fon +41 55 451 11 44
Fax +41 55 451 11 49
info
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