CF8M impeller made by
stainless steel Lost wax investment
casting.
Quick
Detail:
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CF8M Stainless steel
investment castings for impeller of pump industry.
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Process: ceramic shell
Lost wax casting;
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Weight: 3.8kg;
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CNC machining
capacity in house;
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NDT service
available.
Description:
OEM impeller investment
castings for industries as water solution, marine and oil,
gas, food processing, paper pulp,chemical liquids
transmission etc.
Materials that Winnington cast
is stainless steel(including duplex stainless steel), alloy
steel (nickel based), carbon steel etc.. Please contact our
sales for a detailed list.
Brife description of
investment casting process:
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Wax die making: Our wax
die is made of Aluminum which is easy for CNC machining
and fast for cooling.
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Wax injection: Feed the
entire mould with molten wax, and wait until it cooled
when a desired wax pattern is shaped and harden.
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Assembly of the wax
patterns: The wax patterns are connected to a gate system
by a heated metal knife.
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Coating: The ceramic
shell, known as the investment cluster, is fabricated by
three repeating steps: coating, stuccoing, and drying.
The first step involves dipping the cluster into a slurry
of fine refractory material. This fine material is used
first to give a smooth surface finish and reproduce fine
details. In the 2nd step, the cluster is stuccoed with a
coarse ceramic particle, by dipping it into a fluidised
barrel, placing it in a rainfall-sander. Finally, the
coating is allowed to harden.
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Dewaxing: The investment
is then allowed to completely dry, which can take 16 to
48 hours. It is then turned upside-down and placed in a
autoclave to melt out and/or vaporize the wax.
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Burnout and pre-heating:
The mold is then subjected to a burnout, which heats the
mold to remove any moisture and residual wax, and to
sinter the mold. The mold is preheated to allow the metal
to stay liquid longer to fill any details and to increase
dimensional accuracy.
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Casting: The investment
mold is then placed cup-upwards into a tub filled with
sand and be poured.
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Treatment: The shell is
then hammered, media blasted, vibrated, waterjeted, or
chemically dissolved to release the casting metal. Extra
processs like weld repairing,grinding, ball blasting,
machining, electro plating would be taken to get a final
cleaned investment casting part.
Specifications:
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Maximum Casting
Size
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500*500*350mm
|
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Standards
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ASTM,JIS,DIN,BS,MIL
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Casting weight
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10g~80kg
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Wall thickness
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1.5-2mm Min
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Casting process
type
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silica sol lost wax
casting
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Machining
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CNC machining,CNC
lathe
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Surface finish
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electro polishing,
satin, hand polished, pickled, zinc plating
|
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Tolerances
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Raw Casting tolerances
in drawing are according to DIN VDG-Merkblatt P-690;
Dimension less than or equal to 24mm will in
accordance to D1 standard; Dimension greater than
24mm will in accordance to D2 standard
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Advantage:
Winntington has strong
technical support and full range of casting facilities and
testing instruments to cater the growing investment casting
business.
Investment casting is an
industrial process based on and also called lost-wax casting,
one of the oldest known metal-forming techniques.The castings
allow the production of components with accuracy,
repeatability, versatility and integrity in a variety of
metals and high-performance alloys.
