With an engineered tool steel mold, Custom Castings utilize gravity and tilt pour permanent as well as semi permament mold processes.
After working with you to ensure optimal engineering, our custom casting products undergo a three step process:
-
The molten aluminum is poured into a permanent mold.
-
Once solidified, the mold is opened and the casting is removed.
-
The mold’s runners are removed and the casting is sanded or machined to your specifications.
Pouring Methods
Tilt-Pour - Gentle controlled filling of the mold, reduces casting defects
Static Pour - Greater flexibility for casting geometry
Casting Options
Sand Cores - Greater flexibility for internal cavities
Cast Inserts - Casting integrated with another material
The following charts provide an at-a-glance comparison between permanent mold casting pouring methods and casting options.
Factors Affecting Selection of Casting Process for Aluminum Alloys more detailscollapse
|
Factor |
Sand Casting |
Permanent Mold Casting |
Die Casting |
|
Tooling Cost |
Low ($2000) |
Moderate ($10,000) |
High ($100,000) |
|
Casting Rate |
Low |
Moderate |
High |
|
Maximum Size |
Unlimited |
High |
Moderate |
|
Internal Shape |
Limited (sand cores) |
Most Flexible (steel or sand cores) |
Limited (steel cores) |
|
Minimum Wall Thickness |
.188" |
.188" |
.100" |
|
Tolerance Obtainable |
Low |
Moderate |
High |
|
Surface Finish |
Low |
Moderate |
High |
Comparison Of Typical Casting Alloy Properties more detailscollapse
|
Alloy |
Ultimate |
Yield |
Elongation |
Compressive Yield |
Shear |
BHN |
Info Source |
|
356.1 |
21 |
10 |
3 |
- |
- |
- |
1 |
|
356.1-T6 |
33 |
22 |
3 |
27 |
30 |
65-95 |
1,2 |
|
A356.2 |
27 |
13 |
8 |
- |
- |
- |
3 |
|
A356.2-T61 |
38 |
26 |
5 |
28.3 |
22.5 |
70-100 |
12 |
|
319 |
27 |
14 |
2.5 |
19 |
24 |
85 |
12 |
|
ZA-12 |
47.6 |
38.9 |
2.2 |
33.9 |
- |
89 |
2 |
|
413 |
42.9 |
21 |
2.5 |
- |
24.7 |
80 |
2 |
Source Legend
1 = ASTM B108-06
2 = matweb.com
3 = AFS "Aluminum Casting Technology" 2nd Edition |
