There are three techniques in our lost wax casting process including waterglass technique casting, silica sol technique casting and lost foamcasting.
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Railway Wheels-We use lost wax casting to produce the Railway wheels,If
necessary,We will also forging it.
There are three techniques in our lost wax casting process including water
glass technique casting, silica sol technique casting and lost foam
Water glass technique casting is also called cryogenic lost wax. And the
dimension tolerance we could reach is CT7-8.The main material is carbon
steel, alloy steel. The weight controlled is about 0.2-80 kg.
Silica sol technique casting is also called mesothermal lost wax. And the
dimension tolerance we could reach is CT5-6.The main material is stainless
steel ,carbon steel, alloy steel. The weight controlled is about 0.1-60kg.
Lost foam casting is a modern form of investment casting that eliminates
certain steps in the process. And the dimension tolerance we could reach
is CT8-9.The main material is gray iron, dutile iron, high Cr cast iron,
resistance cast iron. The weight controlled is about 0.2-100 kg.
1. Mould DesigningStrictly
making 3D model based on customer’s drawing dimensions, and mastered
the contractibility rate for all types of material.
2. Wax Injection
Wax design of the desired castings are produced by injection molding.
These designs are called patterns.
The patterns are attached to a central wax stick, called a sprue, to
form a casting cluster or assembly.
4. Shell Building
The shell is built by immersing the assembly in a liquid ceramic slur
ry and then
in a bed of extremely fine sand. Up to eight layers may
be applied in this manner.
At this point, all of the residual pattern and gating material is rem
oved, and the ceramic mold remains. The mold is then preheated to a s
pecific temperature and filled with molten metal, creating the metal
6. Mould Shell Roast
This process is to put the lost-wax shell into the roast furnace and
make them harder. Heating the Mould shell before casting is also to
insure the better products surface texture.
7. Smelting the Liquid Steel
Allocate the chemical composition and sampling before steel casting.
Inspection on materials by spectrometer testing.
In the conventional process, the shell is filled with molten metal by
10. Cut Off
The parts are cut away from the central sprue using a high speed
Friction saw .
Carbon steel and low-alloy steel need normalizing and temper, oil-que
nching, water-quenching and so on. We can set out different heat trea
tment method as per different requirement from customers.
Polishing is to modify the out of flatness on casting head after cast
cuttig and to modify the burring and splashings in the process o
f gasting cycle.
Inspection of the mechanical properties, surface, internal quality, a
nd to check if the rough dimension meet the drawing requirement for t
Cut the piece of raw material into a desired final shape and size. No
w we have CNC, Lathe, milling machine, drilling machine, boring lathe
and grinding machine.
Quality inspection on the machining dimension. Mainly tools we use is
like specialized gauge and callipers, mircocalliper,three-dimensionl
16. Storage and Delivery
Efficiency of package goods delivery on time per your shipping reques
ts. Advantage of investment casting
casting : :
Our lost wax casting process is virtually unrestricted by the size ,thickness and
Our lost wax
steel, alloy steel, manganese steel,stainless steel ,and high-Cr & wear-resist Iron
and so on.
process able to utilize a wide variety of alloys for common carbon
The lost wax casting process is capable of producing foundry with higher
accuracy than ordinary forgings and weld assembly in general condition.
Lost wax castings are able to reduce costs in many cases such as reduced
machining, less materiel waste and so on.
In addition, we own CNC machining center and CNC Lathe, so machine parts
(machining parts or machinery parts),metalwork (metal products) are ok for us!