Semi-solid material formation within a cold chamber shot sleeve
a technology of semi-solid materials and cold chambers, applied in the field of semi-solid material formation, can solve the problems of long cycle time of casting process, inability to use molten materials, and inability to meet the requirements of casting process,
Inactive Publication Date: 2007-12-06
GM GLOBAL TECH OPERATIONS LLC
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- Application Information
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Benefits of technology
The present invention provides a method and apparatus for forming a semi-solid material in a shot sleeve. This allows for the minimized handling of the semi-solid material and reduces the risk of damage during the casting process. The apparatus includes a mixing sleeve, a shot sleeve, an electromagnetic circuit, and a cooling sleeve. The method involves introducing molten material into the mixing sleeve and using the electromagnetic circuit to mix the material. The cooling sleeve then cools the material until it reaches a semi-solid state. This invention provides a more efficient and safe way to produce semi-solid materials in a casting process.
Problems solved by technology
However, use of a molten material may not be desired or feasible and a semi-solid material is used.
Such robots and devices may be extremely expensive and lengthen the cycle time of the casting process.
Mechanical issues may also arise with the robot or automated device.
Method used
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[0020]The following detailed description and appended drawings describe and illustrate various exemplary embodiments of the invention. The description and drawings serve to enable one skilled in the art to make and use the invention, and are not intended to limit the scope of the invention in any manner. In respect of the methods disclosed, the steps presented are exemplary in nature, and thus, the order of the steps is not necessary or critical.
[0021]FIG. 1 shows a shot sleeve apparatus 10 including a mixing sleeve 12 forming a mixing sleeve cavity 14, a means for causing 16 a molten material 18 (shown in FIGS. 2-4) to substantially fill the mixing sleeve cavity 14, a cooling sleeve 20, an electromagnetic circuit 22, a gate 24, a thermocouple 26, and a shot sleeve 28 forming a shot sleeve cavity 30. The molten material 18 can be any castable material such as aluminum, for example.
[0022]The mixing sleeve 12 forms the mixing sleeve cavity 14 which includes an inlet 32 and an outlet 3...
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Abstract
A method and apparatus is disclosed for the preparation of a semi-solid material in a mixing sleeve of a casting apparatus, the semi-solid material formed from a molten material after a mixing and a cooling thereof in the mixing sleeve wherein a handling of the semi-solid material is minimized.
Description
FIELD OF THE INVENTION[0001]The invention relates to the formation of a semi-solid material and more particularly to a method and apparatus for the preparation of a semi-solid material in a mixing sleeve of a casting apparatus, wherein the semi-solid material is formed from a molten material after a mixing and a cooling thereof in the mixing sleeve and prior to being transferred to the shot sleeve.BACKGROUND OF THE INVENTION[0002]In a typical die casting process, a molten material is introduced to a shot sleeve of a casting apparatus. The molten material is then forced into a die and cast into a desired object. However, use of a molten material may not be desired or feasible and a semi-solid material is used. Typically, to form a semi-solid material a molten material is electromagnetically stirred and cooled in a separate cooling sleeve. The semi-solid material may also be electromagnetically stirred and cooled in a separate ladle cup. The semi-solid material is then transferred to ...
Claims
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IPC IPC(8): B22D17/08
CPCB22D17/007
Inventor WARD, GARY C.OUIMET, LARRY J.COX, MICHAEL L.
Owner GM GLOBAL TECH OPERATIONS LLC