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A Design Study in Steel - Cast Connex Steel Construction Connector

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


Back

Choose a 
method above

15

 
Copyright 2009  by the Steel Founders' Society of America   All rights reserved. 
Address comments to: blairr@sfsa.org
Last Modified:October, 2009 by STG

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