Stainless Steel Investment Casting Foundry For 1.4409 Pump Impeller with CNC machined finish.
- Investment casting foundry for pump impellers;
- Casting process: lost wax method;
- Material: stainelss steel 1.4409;
- Weight: 1.12kg.
- Surface: CNC machined surface (machining in house);
- Dye penetration and X ray inspection service available at extra
Winnington casting specializes in manufacturing precision cast pump
impellers of different types:unshrouded impeller, shrouded impeller
Material we can cast are listed below:
- Stainless steel: 300 series Austenitic, 400 series Hardenable,
- Carbon steel: 10XX series, 11XX series etc
- Alloy Steel
- Tool steel
- Nickle based alloy
Maximum Cast Size
Casting weight range
1.5-2mm Min depends on structure
Casting process type
Ceramic shell lost wax casting
CNC machining, CNC lathe in house
Raw casting material according to VDG P690. Can achieve tighter
tolerance by CNC machining.
Dye inspection, X ray inspection, ultrasonic inspection etc
Pickled,passivated, zinc plating, black phosphating ,vibration
polishing, electro polishing, satin polishing, hand polishing
Investment Casting Process Flow:
1. Mold making. A wax mould is made according to the CAD system.
2. Wax Model-making. Molten wax is poured into the mould and formed
a model that exactly same shape as the cast part.
3. Wax assembly. The wax patterns are connected to the runner
system by hot knife according to certain rules. When this finish, a
pattern tree is ready.
4. Slurry. The wax pattern tree is dipped into a slurry of silica,
then into a sand-like stucco, or dry crystalline silica of a
controlled grain size. The slurry and grit combination is called
ceramic shell mould material, although it is not literally made of
ceramic. This shell is allowed to dry, and the process is repeated
until at least a half-inch coating covers the entire piece. The
bigger the piece, the thicker the shell needs to be.
5. Burnout. The ceramic shell-coated piece is placed cup-down in an
autoclave, who hardens the silica coatings into a shell, and the
wax melts and runs out. This process makes hollow in the shell
where formerly occupied by the wax.
6. Pouring. The shell is preheated in the clave to harden the
patches and remove all traces of moisture, then placed cup-upwards
onto a sand bed. Metal is melted in a furnace, then poured
carefully into the shell. The shell has to be hot because otherwise
the temperature difference would shatter it. The filled shells are
then allowed to cool.
7. Release. The shell is hammered or sand-blasted away, releasing
the rough casting. The gates, which are also created in metal, are
8. Machining and finishing. The casting is shot blasted and then
machined to required tolerance if necessary. Further finish like
plating or polishing can also be operated according to customer
Winnington supplies parts for a multitude of industries such as:
Petro Chemical, Valves and Pumps, Marine, Medical,Transportation,
Food Machinery, and other Machinery.
Winnington Casting is Ready to Assist You With …
Lost wax investment castings from 10g to 80kg in weight.
Cast engineering materials including low and high steels, stainless
steels, tool steels, nickel based alloys.
Lost wax tooling design and manufacturing, from simple single
cavity to multi-cavity and semi or fully automated tools.
Full CNC machining services.
All NDT testing capabilities.
Full metals testing capabilities including chemical analysis,
mechanical testing, metallography,and corrosion testing.
Full range of heat treatment processing including annealing,
solution annealing, normalizing, quench and temper hardening,
nitriding, vacuum processing, and age hardening.
Consultation services to assist with metallurgical issues.
Full range of surface treatments available including passivation,
plating, painting, and polishing.
In-house surface preparations include shot blast, sand blast, and