sfsa_s.gif (4934 bytes) amc.gif (6172 bytes)

afs.gif (3195 bytes)

A Design Study in Steel Castings - Steel Plates in BOP Valve                                        

 The Molding Methods

Pacific Steel uses three types of molding methods.

GREEN SAND MOLD
Moist, clay-bonded sand is tightly packed around a wood or metal pattern in mold boxes. The pattern halves are removed, and the mold is assembled with or without cores.

AIR-SET SAND MOLD
Chemically bonded sand is packed around a wood or metal pattern in mold boxes. At room temperature, the sand molds become rigid. Pattern halves are removed and the mold is assembled with or without cores.

SHELL MOLD
Resin-coated sand is applied to heated metal patterns forming shell-like mold halves.  The shell halves are bonded together with or without cores.

SAnd3a.jpg (4780 bytes)
Sand Mold
shell_mold_1A.jpg (11190 bytes)
Shell Mold


Back


Next

15

 

Copyright 2003  by the Steel Founders' Society of America   All rights reserved. 
Address comments to: blairr@sfsa.org
Last Modified:April, 2003 by STG

arrow_top.gif (1191 bytes)
Page 1

In cooperation with
Pacific Steel
Castings
wpe4B.jpg (4786 bytes)