Moulding sand testing PPT..pdf

Following moulding sand test is explained in this PPT.
Hardness test.
Permeability test.
Clay content test.
Grain fineness number (GFN).
Green shear strength test.
Moisture content test.
Dry compression strength test.
Compatibility strength test.
Green compression strength test.
Tensile strength test.

1. Moulding
Sand
Testing

2. Permeability
Test of
Moulding
Sand.

3. The permeability test is used to
determine the quantity of air
passing through the sand mould
specimen under specific pressure
and time.
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4. www.mechgrace.com
Air pressure
at start of the
specimen
Air pressure at
end of the
specimen
Sand Mould
Specimen
P1
P2
A
H
Permeability test
Time (t)

5. Hardness test
of moulding
sand.

6. A mould hardness test is
performed in the foundry to
determine the hardness of the
mould after the ramming of sand is
done.
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7. Hardness tester.
A sample is rammed
and the mould hardness
test is done by
measuring the depth of
penetration with the
hardness tester.
Sand
Mould
Specimen
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8. Moisture
content test
of moulding
sand.

9. A moisture content test is
done to determine the
amount of moisture in the
moulding sand.
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10. Moisture is measured by
inserting an electric probe into
the mould sand.

As mould is wet electric current
will flow and indicate the
moisture in the sand
in the moistmeter.
mould sand
Moistmeter
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11. Clay content
test of
moulding
sand.

12. A clay content test is used
to determine the amount of
clay in the sand mould
specimen.
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13. A standard
sample of 50 gm
moulding sand
with weight = W1
is taken.
Weight=W1
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14. Clay
Sand
Water
The sample is
mixed and stirred
in sodium
hydroxide, water,
clay and sand to
seprate them.
+
Sodium
Hydroxide
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15. Oven
Dry Clay
in ovenClay that floats
on water is
dried in the
oven.
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16. Final weight of seprated
clay is measured which
is called total clay
content.
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17. Green
compression
strength of
moulding sand.

18. Green compression strength is
measured using a universal sand
strength machine that is used to
determine compression strength.
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19. Sand Mould
Sample
Universal sand strength machine
Compressive
Force
Compressive
Force
Strength
Indicator
Universal Sand Strength Machine
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20. Green shear
strength of
moulding sand.

21. Green shear strength is measured
using a universal sand strength
machine that is used to determine
shear strength by applying shear
forces.
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22. Sand Mould
Sample
Universal sand strength machine
Shear
Force
Shear
Strength
Indicator
Shear
Force
Universal Sand Strength Machine
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23. Dry
compression
strength of
moulding sand.

24. Dry compression strength is
measured using a sand rammer to
make a sample and use universal
sand strength to indicate dry
compression strength.
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25. Dry Sand Mould
Sample
Universal sand strength machine
Compressive
Force
Compressive
Force
Strength
Indicator
Universal Sand Strength Machine
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26. Compatibility
test of
moulding
sand.

27. A compatibility test is done to
indicate how much sand is able to
compact and reduce in height
when we ram loose sand.
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28. Force
Sand
Ram
Scale to
measure
height
of
compactness.
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To read full article on
Moulding Sand
Testing

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