A pattern is the item you are duplicating, it must be smooth and drafted to allow removal from the sand mold. The pattern illustrated is round and has no undercuts.
|Pattern, flask and sand||1. Pack sand in drag (bottom) section of the flask. Place bottom board on top, flip mold.|
2. Apply parting dust to separate the two sections of sand.
|4. Carefully remove pattern, close and clamp mold.|
|5. Pour molten metal.||6. Shake-out, remove casting. Sand is reused!|