|
The
Molding Process
| Each of the two molding methods has relative
capabilities, advantages, and costs, as shown in the table below. |
|
Target |
Green Sand |
No-Bake
Sand |
|
As-cast dimensional
+/-
tolerance across 100 mm (4")
|
ISO8062
CT-8
1.6 / 0.06 |
Typical
=
1.6 / 0.06 |
Typical
=
1.4 / 0.05 |
|
As-cast dimensional
+/- tolerance across 630 mm (25")
|
ISO8062
CT-8
2.6 / 0.1 |
Typical
=
3.0 /0.12 |
Typical
=
2.0 / 0.08 |
| Nominal surface finish
(RMS) |
450 |
400-900 |
300-900 |
| Minimum Section
Thickness (mm / ") |
12.5/
0.50 |
6 / 0.25 |
5 /
0.19 |
| Intricacy of
Detail |
Fair |
Fair |
Good |
| Tool/Pattern Cost |
Low |
Low |
Low |
| Mold Material Cost |
Low |
Low |
Medium |
|
Given the as-cast
tolerance and finish requirements, the level of detail, and the low cost
issue, choose an appropriate molding method for the LARGER
27" LONG CONNECTOR --
GREEN
SAND, NO-BAKE
SAND |
|
