jiachuancasting
Yeni Üye
Kayıt Tarihi: 2022-22-Nisan
Ülke: Avustralya
Aktif Durum: Pasif
Gönderilenler: 2
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| Gönderen: 2022-22-Nisan Saat 11:44 | Kayıtlı IP
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The main processes and processes in the shell making
process are:
1) Degreasing and degreasing of modules
In order to improve the ability of the coating to wet the
surface of
the module, the oil stain on the surface of the module
needs to be
removed when the wax-based moulding material is used to
make the
investment mould.
2) Apply paint and sand on the module
Before painting and hanging the paint, the paint should
be stirred
evenly to reduce the precipitation of refractory
materials in the
paint bucket as much as possible, and the viscosity or
specific
gravity of the paint should be adjusted so that the paint
can fill
and wet the investment mold well. The module is immersed
in the
paint and shakes up and down, so that the paint can well
wet the
investment mold and evenly cover the surface of the
module. After
the paint is applied, sanding can be carried out.
3) Shell drying and hardening
After each layer of shell is coated, it must be dried and
hardened,
so that the binder in the coating changes from sol to
jelly and gel,
and connects the refractory materials together.
4) Loss of investment in self-molded shell
After the shell is completely hardened, the module needs
to be
melted from the shell. Because the module is usually made
of wax-
based mold material, this process is also called
dewaxing. According
to the different heating methods, there are many dewaxing
methods,
the hot water method and the same pressure steam method
are used
more.
5) Roasted shell
If molding (sand filling) is required for pouring, before
firing,
the demolded shell should be buried in the sand in the
box, and then
loaded into the furnace for firing. If the high
temperature strength
of the shell is high and no casting is required, the
demolded shell
can be directly sent to the furnace for roasting. During
roasting,
the furnace temperature is gradually increased, and the
shell is
heated to 800-1000 ° C and kept for a period of time
before
pouring.
Finally, what kind of investment casting shell gives more
precision?
To learn more, click
investment-casting-shell-making-accuracy-
higher/">here
Düzenleyen jiachuancasting 2022-22-Nisan Saat 11:46
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Konu: Shell making process of investment castin
