Valve body precision investment casting CNC machining capacity
electro polished finish.
- Casting of valve body for flow control industry;
- Casting process: silica sol lost wax method;
- Foundry with PED 97/23/EC & AD2000 W0 Certifications;
- ISO9001:2008 certificated;
- Chemical composition tested by German spectrometer;
- NDT such as Dye test, X ray test are available.
Investment casting with ceramic shell process, die making and CNC
machining capacity in house. Stainless steel, alloy steel, carbon steel investment castings
weight from 10g to 80kg.
The most common material that Winnington cast:
Stainless Steel (70%)
303, 430, 420, CF3M (AISI 316L), CF8M (AISI 316), CF8 (AISI
304),CD4MCu, CD4MCuN,ANC20,1.4408,1.4517, 1.4306, 1.4581, 17-4PH,
WCC, 1020, S355JR, SCS16, SCS14, SCS13, 1.0619, WCB, 1045 , LCC
Investment Casting Process:
- Wax die making: Our wax tooling is made of Aluminum which is easy
for machining and fast for cooling, at the same time, light for
- Wax injection: Filling the entire mould with molten wax, and let it
cool, until a desired wax pattern is shaped and harden.
- Assemble the wax patterns: The wax patterns are welded to a runner
system by a heated metal tool according to a certain pattern
- Investment: The ceramic mould, known as the investment, is produced
by three repeating steps: coating, stuccoing, and hardening. The
first step involves dipping the cluster into a slurry of fine
refractory material and then letting any excess drain off, so a
uniform surface is produced. This fine material is used first to
give a smooth surface finish and reproduce fine details. In the
second 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.
- Dewax: 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 & preheating: 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
- Pouring: The investment mold is then placed cup-upwards into a tub
filled with sand and be poured.
- After treatment: The shell is then hammered, media blasted,
vibrated, waterjeted, or chemically dissolved to release the
casting. Further actions like weld repairing,grinding, shot
blasting,CNC machining, electro plating will be taken to get a
final cleaned precision casting part.
Pipe Fittings & Valves,turbine
Marine and Oil
Mechanical Investment Castings
Material(SS) Stainless Steel: CF3M (AISI 316L), CF8M (AISI 316),
CF8 (AISI 304)
Material(CS) Carbon Steel: CD4MCu, SCS16, SCS14, SCS13, 1.4408,
1.0619, WCB, 420
Winnington was established in 2000, specializing in manufacturing
of stainless steel castings.
Supported by nearly 500 staffs, Winnington is equipped with a large
scale of foundry and CNC machining equipments, to cater to the need
of growing stainless steel castings business and meet an annual
production capacity of 3,000 tons for investment casting. Besides, we have advanced inspecting instruments such as
Spectrometer, Metallographic Microscope, Tension Tester, and Impact
tester for Chemical & Physical Analysis, and 2D projector, CMM
to assure dimensional precision of stainless steel castings . We were certificated with ISO9001:2008,PED/AD2000 by TUV.
During the past years, we have manufactured more than 3300 types of
stainless steel castings, which are widely applied in Auto Parts, Construction Hardware,
Marine Hardware, Pumps & Valves, Machine Parts and other
We assist our customers with concepts, estimating manufacturing
costs, manufacturing techniques and material considerations. We are
able to participate in upgrading, redesigning, re-evaluating or
modernizing existing products to increase performance and/or reduce
We provide material sourcing both oversea and in local market,
helping customer to source the most suitable material at its best
Testing and Inspection
We provide a number of testing and inspection services including
ultrasonic inspection, magnetic particle inspection, material
hardness and/or material properties testing.
With in house expertise and tool shop, we have the complete
engineering team to create molding / tooling necessary for
We are equipped with High-precision CNC lathe/milling center to
process the interior and exterior of various types of curved
surfaces such as cylinder, cones, contrate, chamfer, bevel edges,
screw thread, milling holes and boring holes, while conforming to
the JB/T8324.1-96 Standard.
We provide customers with various surface finishing treatments,
including mirror polishing, passivation, sand blasting, shot
blasting, barrel finishing and vibratory finishing. To meet the
growing needs of our customers, special treatments may also be