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Pump Impeller Investment Casting Foundry For Ceramic Shell Lost Wax Casting
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Pump Impeller Investment Casting Foundry For Ceramic Shell Lost Wax Casting

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Pump Impeller Investment Casting Foundry For Ceramic Shell Lost Wax Casting
 
 
Quick Detail:
 

  • Impeller Investment casting foundry in South China;
  • Casting for unshrouded impeller(semi-open impeller), shrouded impeller ( closed impeller);
  • Casting process: lost wax casting;
  • Material: stainelss steel CF8M (AISI 316, UNS S31600);
  • Weight: 2.97kg.
  • Surface: shot blasted and electro polished;
  • Dye penetration and X ray inspection service available.
  • Heat No. tracing.

 
 
Description:
 
Winnington casting is an TUV PED certified company, which is professional in manufacturing impeller ceramic shell investment castings. We cast materials of below: 

 
  • Stainless steel:  300 series Austenitic, 400 series Hardenable, Duplex etc
  • Carbon steel: 10XX series, 11XX series etc
  • Alloy Steel
  • Tool steel
  • Nickle based alloy Steel

 
 
 
Specifications:
 

Max Casting Size

500x500x350mm

Casting weight range

20g~80kg

Standards

ASTM,JIS,DIN,BS,MIL

Wall thickness

Min 1.5-2mm 

Casting process type

Silica sol lost wax casting

Machining

CNC machining, CNC lathe

Tolerances

Raw casting material according to VDG P690. Can achieve tighter tolerance by CNC machining.

NDT service

Dye inspection, X ray inspection, ultrasonic inspection etc

Surface finish service

Pickled,passivated, zinc plating, black phosphating ,vibration polishing, electro polishing, satin polishing, hand polishing

 
 

What is investment casting?
 
 
Investment casting is an advanced casting process used to produce metal parts of good surface quality at fine tolerance, close to final shape and cost-effectiveness. Investment casting is a 1:1 process in which one wax pattern produces one metal part. Investment casting can be applied to produce parts of various degrees of complexity, at any volume and for almost any alloy.
 
 
 
Ceramic shell Investment Casting Process :
 
 
The ceramic shell casting process starts with wax injection.  A wax tool is filled with wax that is injected
in a liquid or a paste form so it flows into the detail of the mold.  Once cooled, the wax piece - a pattern -
is took out from the die.  
 
Several wax patterns are then attached to a wax pole - commonly called a “sprue”.  Each pattern is attached to 
the sprue by smaller pieces of wax runners which are typically referred to as “gates”.  Gates allow for the 
eventual creation of a space where molten metal can flow into the hollow pattern cavity.  The complete 
assembly is referred to as a “tree”.
 
The next step involves coating the wax tree in a slurry.  Slurry is a mixture of liquid binder and flour 
refractory materials.  Depending on the alloy being cast, drying time requirements, and number of coats 
desired, the binder and flour materials used may vary.
 
Once the tree is dipped in the slurry material, and excess material is drained from the tree, it is then 
coated with sand - commonly referred to as “stucco”.  This can be done in a variety of ways including: 
rainfall sanding, use of a fluidized bed, or by hand covering (the “cat box” method).
 
After each layer dries, the dipping and stuccoing steps take place again.  This continues until the shell 
is completed.  The number of coats will vary depending in part on the pattern configuration and the 
binder used in the slurry. 
 
Once the dipping sequence is completed and each coat has air dried sufficiently, it is time to remove the 
wax from the mold.  This is accomplished by use of an autoclave or a FlashFire dewax oven.  The wax will 
melt out of the shell leaving a hollow cavity.
 
The shell is then placed into an oven where it is fired for a given period of time.  This assists in 
strengthening the shell and removing any remaining wax residue from the shell.  
 
Finally, the fired shell is placed in a bed of sand with the pour cup opening facing up.  Molten metal is 
poured into the shell.  The shell takes on the orange glow of the metal and eventually turns white as the
metal cools.  The shell is then removed, the parts are cut off of the tree and the finishing area takes care 
of grinding away any sign of metal from the gating.

 
Applications:
 
Winnington supplies parts for a multitude of industries such as: Petro Chemical, Valves and Pumps, Marine, Medical,Transportation, Food Machinery, and other Machinery.
 
 
 
 


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Mr. Sophia Peng
Tel: 86-752-2652780
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Winnington Casting CO.,LTD.
Xikeng Industrial Zone, Huizhou, Guangdong, China (Mainland)
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