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Last Updated: April 23, 2024

Claims for Patent: 7,950,441


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Summary for Patent: 7,950,441
Title:Method of casting damped part with insert
Abstract: A method including positioning an insert in a vertical mold including a first mold portion and a second mold portion; and casting a material including a metal around at least a portion of the insert.
Inventor(s): Hanna; Michael D. (West Bloomfield, MI), Sundar; Mohan (Troy, MI), Schertzer; Andrew (St. Catharines, CA)
Assignee: GM Global Technology Operations LLC (Detroit, MI)
Application Number:12/174,223
Patent Claims:1. A method comprising: pre-heating an insert before placing the insert into a setting fixture; loading the insert into the setting fixture, wherein the insert comprises a body portion and a plurality of tabs each comprising a bent tab portion; using the setting fixture to load the insert into a first mold portion of a vertical mold; positioning the insert in the first mold portion of the vertical mold using the bent tab portion of the insert to at least partially assist in holding the insert in place in the first mold portion; closing the first mold portion and a second mold portion of the vertical mold together; and casting a material comprising a metal over at least a portion of the insert to form a part, wherein the casting comprises pouring the material into at least one gate located in the bottom of the vertical mold, wherein only one gate is positioned in between two adjacent tabs.

2. A method as set forth in claim 1 wherein the cross-sectional area of each gate is great enough to avoid turbulent flow.

3. A method as set forth in claim 1 further comprising pre-treating the insert comprising at least one of sand blasting, grit blasting, glass bead blasting, chemical washing, or water jet degreasing.

4. A method as set forth in claim 1 further comprising heating the insert.

5. A method as set forth in claim 1 further comprising coating at least the body portion of the insert to provide a coated insert.

6. A method as set forth in claim 5 further comprising baking the coated insert.

7. A method as set forth in claim 1 wherein the vertical mold is a sand mold.

8. A method as set forth in claim 1 further comprising removing the part from the vertical mold to cool.

9. A method as set forth in claim 1 further comprising shot blasting the part.

10. A method as set forth in claim 1 further comprising removing the portion of the tabs that are protruding from the part.

11. A method as set forth in claim 1 further comprising machining the part.

12. A method as set forth in claim 1 wherein the part comprises at least one of a brake rotor, bracket, pulley, brake drum, transmission housing, gear, motor housing, shaft, bearing, engine, baseball bat, lathe machine, milling machine, drilling machine, or grinding machine.

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