Flash control molding for molds
AssigneeCaterpillar Tractor Co.
InventorJohn R. Nieman
Life of this patent
Estimating the term…
Abstract
A flash control molding is provided for use in association with a pattern for forming a casting cavity in a metal casting mold. The flash control molding includes an elongated strip of pliable material having a predetermined cross sectional configuration to define a thick portion for forming a flash control chamber in the mold, and a thin edge along one side of the thick portion to form a restricted opening between the flash control chamber and the casting cavity so that a casting subsequently produced in the mold is formed with controlled shaped flash which has a built-in fracture line immediately adjacent the casting proper, thereby making the flash easily and cleanly removable from the casting.
Claims9
A flash control molding in combination with a pattern having a nonlinear peripheral edge for forming a casting cavity in a mold, comprising:
- an elongated strip of material having a preselected and substantially uniform cross sectional configuration throughout its length and defining a relatively thick edge portion and a juxtaposed relatively thin edge portion, said thin edge portion being disposed in abutting relation against said peripheral edge of the pattern with said thick edge portion spaced from the pattern, said elongated strip being separable from the pattern and of a pliable material having physical properties sufficient for shaping thereof conformingly to the nonlinear contour of said peripheral edge of the pattern.
Dependencies are inferred from the claim text.