1.    
Plaster
Mold and Ceramic Mold Casting

Plaster mold casting is a production process with
a technique similar to sand casting. Paris plaster is used to create molds for
casting instead of sand. Parts such as valves, tools, gears and key components
are manufactured in the industry by gypsum casting.

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The process is the following
steps:

The model first CAD file is drawn
or processed in Stereolithography, traditional craftsmanship or machined.

The model is designed to include
metal pull mold conicity. A plaster made of gypsum or calcium sulphate is mixed
with talc, asbestos, sand and sodium silicate and water to make slurry. The
slurry is sprayed on the surfaces of the pattern halves.

It takes 15 minutes for the
slurry to occur. Molds are removed from the mold and dried in the oven. Cores
and dies are installed. Molten metal poured into moulds. After cooling, the
plaster is broken and the cores are thoroughly washed.

Ceramicccc

The
manufacturing process of ceramic mold casting is similar to the molding process
of gypsum casting, but you can pour material at higher temperatures. Instead of
using plaster to create metal casting, refractory ceramic is used for casting,
mould material. Metal processing, metal molds and wheel cutting machines can be
produced in the industry and parts can be produced with this process.? Molds
are made of ceramic material

 Ceramics with higher temperatures

? More mold
cost than other casting methods

n
Shaw process

-Reusable pattern in a sinking
bottle

-The mixture is in a state of
rubber that allows the part and the balloon to be removed

-The mold surface is then
hand-held with a hand-held flashlight.

 

 

 

Materials Used
In Castings

Casting is, in general, the
process of creating a substance with a particular shape using a mold. Metal
casting uses a variety of metals to form the molded end product, and it goes
back thousands of years.

The metal casting methods and materials used in the past years are still used
today. Reliable and effective metal casting material used for industrial
purposes. The most commonly used resources are:

• Gray iron
• Ductile iron 
• Aluminum 
• Steel 
• Copper 
• Zinc 

Gray Iron Casting

Gray iron is the most preferred casting material in industrial
production. Accounting for a large part of the casting supply markets are a
multi-faceted issue. The following are suitable for various applications,
including those required:

– Damping or vibration control

– High strength weight ratios

-Metal stasis

Ductile Iron Casting

Ductile iron is a useful alternate for processes that require more strength
than those provided by gray iron casting. Ductile iron is similar to gray iron
and has almost the same advantages. Ductile iron differs from gray iron casting
in the following ways:

• Great power

• Improved wear resistance

* Stronger toughness

• Superior ductility

• Reduced weight

• Reduced shrinkage

• Less cost

Aluminum Casting

Aluminum casting metal is a widely used technique because of its versatility.
Aluminum’s corrosion resistance, high thermal electrical conductivity, good
mechanical properties and high temperature resistance are an effective choice.::

• Mold dump

* Continuous mold casting

• Investment castings

 Sand casting

Steel Casting

Steel is a very good hard casting
material for parts that will be exposed to exceptional wear, shock or heavy
loads. It is useful for applications with corrosion resistance and high
temperatures in aqueous environments. Steel is usually mixed with chromium,
iron and nickel, resistant to corrosion or heat.

 

Copper Casting

Copper is a casting material, the biggest advantage is that it has very good
electrical conductivity. Therefore, the construction industry is often
preferred for copper for electrical components. Other advantages of copper
content:

• Good malleability
• Superior ductility

• Good heat conduction

Zinc Casting

Zinc is suitable for low melting point (425 ° C)
die casting applications. It is an easy alloy due to its fast filling and fast
cooling capability. In terms of cost, zinc is an economical option for small
cast, high volume parts.

Things to Consider When Choosing Casting Materials

It is important to select the appropriate casting and molding materials
for a particular project. Some factors to consider when deciding on casting::

 

* Adequate sound level

• Costing

 
Melting temperature

* Cooling speed

* Wear resistance

• Weight

* Damping capabilities

 

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