Pump Impeller Investment Casting Foundry For Ceramic Shell Lost Wax Casting

Place of Origin:	Zhejiang

Company Profile

Winnington Casting CO.,LTD.

Location:	Huizhou, Guangdong, China (Mainland)
Business Type:	Manufacturer
Main Products:	Precision Investment Casting, Carbon Steel Investment Casting, Alloy Steel Investment Casting

Product Detail

Model No.:	Investment casting foundry 001

Product Description

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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