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Process of lost wax casting PowerPoint PPT Presentation


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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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Process of lost wax casting

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Process of lost wax casting

Process

Process of

of lost

lost wax

wax casting

casting

Process

Process Description:

Description:

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

casting.

Water

Water glass

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.

glass technique

technique casting

casting

Silica

Silica sol

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.

sol technique

technique casting

casting

Lost

Lost foam

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.

foam casting

casting


Process of lost wax casting

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.

3. Assembly

The patterns are attached to a central wax stick, called a sprue, to


Process of lost wax casting

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.

5. Dewax

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

casting


Process of lost wax casting

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.


Process of lost wax casting

8.Spectrochemistry Analysis

Inspection on materials by spectrometer testing.

9. Conventional

In the conventional process, the shell is filled with molten metal by

gravity pouring.

Casting


Process of lost wax casting

10. Cut Off

The parts are cut away from the central sprue using a high speed

Friction saw .

11.Heat Treating

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.


Process of lost wax casting

12. Polishing

Polishing is to modify the out of flatness on casting head after cast

ing

cuttig and to modify the burring and splashings in the process o

f gasting cycle.

13. Inspection

Inspection of the mechanical properties, surface, internal quality, a

nd to check if the rough dimension meet the drawing requirement for t

he prodcuts.


Process of lost wax casting

14. Machining

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.

15.Quality Inspection

Quality inspection on the machining dimension. Mainly tools we use is

like specialized gauge and callipers, mircocalliper,three-dimensionl

and

so on.


Process of lost wax casting

16. Storage and Delivery

Efficiency of package goods delivery on time per your shipping reques

ts. Advantage of investment casting

Advantage

Advantage of

of

lost

lost wax

wax casting

casting : :

Wide

Wide Application

Application Scope

Our lost wax casting process is virtually unrestricted by the size ,thickness and

shape complexity.

Scope

Wide

Wide Choice

Choice of

Our lost wax

steel, alloy steel, manganese steel,stainless steel ,and high-Cr & wear-resist Iron

and so on.

of Alloys

Alloys

process able to utilize a wide variety of alloys for common carbon

Dimensional

Dimensional accuracy

The lost wax casting process is capable of producing foundry with higher

accuracy than ordinary forgings and weld assembly in general condition.

accuracy

Reduction

Reduction of

Lost wax castings are able to reduce costs in many cases such as reduced

machining, less materiel waste and so on.

of Production

Production Costs

Costs

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!


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