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1. TYPES OF PATTERN IN
CASTING PROCESS
Visit, Types of Pattern

2. Types of Pattern in Casting: Properties, Pattern
Materials, limitations, and Applications:

3. Pattern:
It is the replica of the casting to be produced. Replica means, the shape of the pattern
remains the same as that of the shape of the casting to be produced.

4. ● The main modifications in the pattern are the addition of pattern allowances and
the provision of core prints.
● If the casting is to be hollow, additional patterns called cores are used to create
these cavities in the finished product.
● Runner, Ingate, and Riser are the part of the sand casting process used to feed the
molten metal into the casting cavity.

5. ● The quality of the casting produced is dependent upon the type of material, its
construction, and Design.
● Patterns with high surface finish can reduce the defects in the casting process.

6. Properties Possessed by the Pattern in
casting
● No moisture absorption by the pattern material would take place.
● Surface finish produced on the pattern material must be good or excellent.
● The material should be of low density.
● Easiness in fabrication.
● It should be cheaper(Pattern Cost).

7. Types of Pattern in Casting:
The different types of patterns are as follows.
● Solid pattern
● Split pattern
● Match plate pattern
● Cope Pattern and Drag Pattern

8. Types of Pattern Materials:
1.Wood Pattern:
Except for moisture absorption, the wood is possessing all other properties which
are required as a pattern material and out of all the different woods, the wood
which is absorbing less moisture will be used as pattern material.
Example: Teak wood, Mohagaoni, etc.

9. 2.Metal Pattern:
In the case of metal patterns, the density is high and it is difficult to manufacture
the metal patterns.
Ex: Aluminium, white metal, Titanium has low density, but they are of very costly.
● Aluminium = 2.7 gm/cc
● White metal = 3.2 gm/cc
● Titanium = 4.3 gm/cc

10. 3.Plastic Pattern:
They are processing all the properties which are required for pattern
material.hence in today's manufacturing industry, plastics are the most commonly
used pattern materials.
Ex: Epoxy resin, PVC, Nylon, Cellulose, Polystyrene, etc.
Polystyrene: It is used for producing very large castings where the removal of the
pattern is not possible.
Ex: Producing bed of Machine.

11. 4.Wax Pattern
● It will be selected as a pattern material for producing the complex shape of
the pattern, to produce the Complex shape of the casting i.e. because of the
highest softness of the wax material, it is possible to produce the Complex
shape of the pattern easily.
Ex. handicrafts.

12. Applications of using Wax Pattern
● Gold and Silver Ornaments
● Handicrafts
● turbine blades
● a waveguide for a radar system
● surgical instruments etc.

13. For more information, visit Types of Pattern in Casting Process