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CORE
& MOULD BINDERS
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AFCISIL
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| AFCISIL
is a range of Foundry grade Sodium Silicate binders used in CO2
and Self setting process for cores & moulds with or without in built breakdown
agent. |
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| AFCISIL
is specially developed by exacting specification of Na2 : SiO2 ratio,
specific gravity, viscosity etc. It is extensively used in Iron, Steel
& Non-Ferrous Foundries. |
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| PHYSICAL
STATE |
- AFCISIL is available
in LIQUID form.
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| CODE |
PRODUCT |
SPECIFICATIONS |
CHARACTERISTICS |
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A041
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AFCISIL
41
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COLOUR
: Translucent
SPECIFIC GRAVITY : 1.4 to 1.5
VISCOSITY : 90 to 110 sec
Na2:SiO2 Ratio : 1 : 2.2
BREAKDOWN TEST At 950C For 5 min 20-25
PSI .
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With
in built break down agent for small cores / moulds
gives good collapsibility
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A042
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AFCISIL
42
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With
in built break down agent for small cores / moulds
gives excellent collapsibility
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A043
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AFCISIL
43
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COLOUR
: Translucent
SPECIFIC GRAVITY : 1.5 to 1.6 VISCOSITY
: 100 to 120 sec
Na2:SiO2 Ratio : 1 : 2.1
BREAKDOWN TEST At 950C For 5 min 20-25
PSI .
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With
in built break down agent for heavy cores / moulds
gives good collapsibility
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A044
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AFCISIL
44
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With
in built break down agent for heavy cores / moulds
gives excellent collapsibility
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A045
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AFCISIL
45
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COLOUR
: Translucent
SPECIFIC GRAVITY : 1.3 to 1.5 VISCOSITY
: 100 to 130 sec
Na2:SiO2 Ratio : 1 : 2.0 BREAKDOWN TEST
At 950C For 5
min : 20-30 PSI .
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Without
in built breakdown agent for all types of cores /
moulds for exceptionally good collapsibility on mixing
with breakdown agent
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| RECOMMENDED
APPLICATION PROCEDURE |
- Put dry Silica
sand in the mixer.
- Add the amount
of AFCISIL . ( SEE USAGE BELOW ) Run the mixer until water
is well distributed.
- Add the required
amount of Breakdown Agent if essential.
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| TYPE
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RECOMMENDED
MIXING PROCEDURE |
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DRY
SILICA SAND ( COARSER )
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ADD
AFCISIL 3.5 TO 5.0 %
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DRY
SILICA SAND ( FINER )
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ADD
AFCISIL 5.0 TO 7.0%
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MIXING
TIME
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3
TO 5 MINUTES
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BREAKDOWN
AGENT
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ADD
1.5 TO 2.0% IN CASE OF AFCISIL 45 TO ACHIEVE
GOOD BREAKDOWN PROPERTY
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| PRECAUTIONS |
- Prolonged
mixing should be avoided as the frictional heat will cause premature
hardening.
- Mixed
sand lot must be covered with wet cloth to prolong bench life
of mixed batch.
- Cores
and patterns used for this process should have appropriate taper
and good surfacefinish to facilitate excellent and smooth stripping.
- Store
in cool place.
- After
use keep lid/ cap of barrel closed in order to avoid external
contamination.
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| FUNCTIONS
& ADVANTAGES |
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| Consistent
Advantages: |
- Gives excellent
consistent strength & hence reinforced is less or eliminated.
- Develops strength
at faster rate.
- Gives exceptionally
good collapsibility.
- Gas evolution
is very much less.
- Imparts exceptionally
good surface finish to the castings .
- Improved dimensional
stability and accuracy.
- It mixes easily
with sand & its addition rates are lower
For excellent casting
surface finish use our Solvent based AFCIMOL range of coatings. |
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| STANDARD
PACKING |
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| Please
note that the above information & specifications are given in good faith
& are Subject to change without prior notification |
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