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A variable volume metal delivery system for a die casting machine. The system includes a shot sleeve having a plunger propelled by a shot cylinder. A stroke adjustment rod operated by a second cylinder extends into the shot cylinder to define the backward stroke limit of the shot cylinder and conseq

A variable volume metal delivery system for a die casting machine. The system includes a shot sleeve having a plunger propelled by a shot cylinder. A stroke adjustment rod operated by a second cylinder extends into the shot cylinder to define the backward stroke limit of the shot cylinder and consequently that of the plunger. The stroke adjustment rod is movable by means of the second cylinder between a high-volume position, permitting a relatively long stroke, and a low-volume position, providing a relatively short stroke. Accordingly, the volume of the shot sleeve can be changed easily, for example, to accommodate the manufacture of articles either with or without structural inserts.

대표청구항 ▼

A variable volume metal delivery system for use in a die casting apparatus, comprising: a shot sleeve defining an internal shot volume; a plunger reciprocable within said shot sleeve between a retracted position wherein molten metal may be introduced into said shot sleeve and an extended position wh

A variable volume metal delivery system for use in a die casting apparatus, comprising: a shot sleeve defining an internal shot volume; a plunger reciprocable within said shot sleeve between a retracted position wherein molten metal may be introduced into said shot sleeve and an extended position wherein metal is expelled from said shot sleeve, said plunger having an extended stroke limit and a retracted stroke limit; gross volume control means for changing the retracted stroke limit of said plunger between a low-volume position and a high-volume position without varying the extended stroke limit of said plunger; and fine volume control means for providing fine adjustment of the retracted stroke limit of said plunger in both of the low-volume and high-volume position without varying the extended stroke limit of said plunger.