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All
Casting Technical Data
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| Process |
Min.
Section mm |
Min.
Dia Cored Hole mm |
Surface
Finish Microns |
Precision
and Tolerances. |
Sand |
3
- 6 Depending upon metal |
4.5
- 6 |
6.25
- 25 |
1,
5 - 4, 2 mm Depending upon metal
& casting size. Tolerance of + 0.25 mm possible on some parts. |
Shell
Mould |
1,
5 for most material |
6
- Mar |
Some
what better than sand |
+0,
003 mm/mm 0.075 total possible on
some dimensions. |
Permanent
Mould |
2.38
Most Materials |
4.5
- 6 |
2.5
- 6.25 |
+0.015
mm/mm for first 25mm 0.025 mm to
0.05 mm for each additional 25 mm |
Die
Casting |
0.625 |
0.76
- 4.5 Depending upon metal |
1
- 2.5 |
+0.025
- 0.125 mm depending upon material |
Plaster
Moulding |
0.75 |
12.5 |
0.75
- 1.25 |
+0.005
- 0.010 mm/mm or Less |
Investment
Casting |
0.75 |
0.50
- 0.750 |
0.25
- 2.12 |
+0.005
mm / mm |
Centrifugal
Casting |
0.75 |
4.3
- 6 |
2.25
- 6.25 or as in sand |
Same
as permanent mould. |
| Die
Casting Comparison with other
production processes |
| Process |
Tool
Cost |
Direct
Labour |
Finishing
Costs |
Field
of Application |
Sand |
Low |
Wide
range much hand labour required. |
Wide
range, high to low depends upon
cleaning, snagging and machine req. |
Singular
and batch production of medium &
large components of cast iron, cast
steel not precision. |
Shell
Mould |
Low
to Moderate |
Moderate |
Low,
often only a minimum required. |
Batch
& mass production of cast iron,
steel components to reduce the cost
of machining. |
Permanent
Mould |
Medium |
Moderate |
Low
to Moderate |
Batch
Production |
Die
Casting |
High |
Low
to medium |
Low,
little more than trimming necessary |
Mass
Production of small components of
Aluminium, Zinc magnesium
copper alloys to reduce the cost of
machining. |
Plaster
Moulding |
Medium |
High
skilled operators necessary |
Low
little machining necessary |
Batch
Production |
Investment
Casting |
High |
High
many hand operators req. |
Low
machining usually not necessary |
Steel
alloyed, Steel, Small Batch small
size to reduce the expansive
machining. |
Centrifugal
Casting |
Medium |
Moderate |
Low
to Moderate |
Singular
batch production bearing sleeves of
bearing alloys cast iron tubes. |
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P
& D Engineers Pvt. Ltd.
B/9
1st Floor Parsi Panchyat Complex,
Nr, Jasoda nagar,
G.I.D.C. Road, Vatva
Ahmedabad 382 445 (Gujarat) INDIA
Phone : +91-79-25830217
Fax : +91-79-25830217
E mail : info@pdepl.com,
pdengineers@gmail.com
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