Casting on heated models
A chain of precision casting begins
From the manufacture of wax models. AT
Industry wax models get
With the use of metal tools.
Such equipment consists of several
Parts and an ejector mechanism,
Which provides complex
The syringe provides the introduction of hot
Wax in the mold.
In the mold
A portion of the hot wax is cooled and
Hardens. When is achieved
Certain strength, rigging
Open and extract the model.
In most cases, complex castings
One is not filled. Several
Wax models are mounted in model
Blocks. Individual models are heated in
The places where they will be fastened
And then they combine melted wax
With a gate system. Such a block
Is a continuous blank for
The model block is applied ceramic
coating. The unit is immersed in a ceramic
A suspension that is a mixture of
Water, ceramic particles, and
Special substances that improve
Wetting and mixing. After that
The model block is dried in sandy-air
Flow. So the first layer is formed
Shell. This operation must be repeated
repeatedly. The more hot
Metal will be poured into the mold, the
More layers are needed. In this way,
Form a strong shell of the form.
Further the model is extracted from the mold
In steam autoclaves or in ovens. In furnaces
For calcining the ceramic form
Cooked to temperatures higher than
1000 ° C.
After pouring the metal into the mold
A block of precision castings with a single
Gate system. Castings are cut
And sent to the final treatment.