Making a Pattern for a Machine Molded Steel Globe & Angle Valve

16mm-$21.98. USOE-Castle. OE340. Shows how machine molding affects pattern design; how this particular pattern is designed, constructed, and mounted on inserts; how casting in steel affects pattern design; how the gating system for this particular pattern is designed and built for casting in steel. Making a Pattern for a Three-Part Mold. (20 min) 16mm-$27.74. USOE-Castle. OE326. Explains the reasons for the three part pattern; shows how to make the layout; how to segment the body or center section; how to eliminate end grain on large flanges; how to turn large work on the end of the lathe.