Lost wax investment casting
for impeller in pump industry, X ray test
available.
Quick
Detail:
- CF3M Stainless steel
investment castings for impeller of pump.
- Application: marine and oil
industry.
- Process: Silica Sol Lost wax
casting;
- Wax type: Medium temperature
wax;
- Weight: 4kg;
- CNC machined in
house;
- NDT service
available.
Description:
OEM impeller investment casting
parts for industries such 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:
- Wax die making: Our wax die is
made of Aluminum which is easy for CNC machining and fast for
cooling.
- Wax injection: Feed the entire
mould with molten wax, and wait until it cooled when a desired wax
pattern is shaped and harden.
- Assembly of the wax patterns:
The wax patterns are connected to a gate system by a heated metal
knife.
- 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.
- 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.
- 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.
- Casting: The investment mold is
then placed cup-upwards into a tub filled with sand and be
poured.
- 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:
Maximum Casting Size
|
500*500*350mm
|
Standards
|
ASTM,JIS,DIN,BS,MIL
|
Casting weight
|
10g~80kg
|
Wall thickness
|
1.5-2mm Min
|
Casting process type
|
silica sol lost wax
casting
|
Machining
|
CNC machining,CNC lathe
|
Surface finish
|
electro polishing, satin, hand
polished, pickled, zinc plating
|
Tolerances
|
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
|
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.