Method of casting damped part with insert

• US 9,409,231 B2
• Filed: 05/15/2014
• Issued: 08/09/2016
• Est. Priority Date: 07/20/2007
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Hanna, Michael D., Sundar, Mohan, Schertzer, Andrew
• Primary Examiner(s): Kerns, Kevin P
• Assistant Examiner(s): HA, STEVEN S
• Application Number:
  US14/277,849
• Publication Number:
  US 20140246162A1
• Time in Patent Office: 817 Days
• Field of Search: 164 98-121, 164/340, 164/344, 164/347
• US Class Current: 1/1
• CPC Class Codes: B22D 19/00 Casting in, on, or around objects which form part of the product B22D23/04 takes precedence; alumino-thermic welding B23K23/00; coating by casting molten material on the substrate C23C6/00
• CPC Class Codes: B22D 19/0081 pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
• CPC Class Codes: B22D 19/04 for joining parts
• CPC Class Codes: Y10T 428/24628 Nonplanar uniform thickness material

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.

Claims

1. A method comprising:

positioning an insert in a vertical mold comprising a first mold portion and a second mold portion; and

casting a material comprising a metal around at least a portion of the insert and wherein the insert comprises an annular body portion having an inner edge and an outer edge, the annular body having a flat portion extending radially, and a tab having a portion extending radially inward from the inner edge or outward from the outer edge, and the tab having a portion extending radially being parallel to the flat portion, and wherein the tab comprises a bent tab portion.

2. A method as set forth in claim 1 further comprising pre-treating the insert before positioning the insert in the vertical mold.

3. A method as set forth in claim 2 wherein the pre-treating comprises 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 coating the insert before positioning the insert in the vertical mold.

5. A method as set forth in claim 4 wherein coating the insert comprises at least one of spraying, dipping, or painting.

6. A method as set forth in claim 4 further comprising baking the insert.

7. A method as set forth in claim 4 further comprising preventing the casting of the material around the insert from washing away the coating.

8. A method as set forth in claim 1 further comprising pouring the material into the vertical mold so that the metal is filled from the bottom of the mold up.

9. A method as set forth in claim 8 further comprising pouring the material into at least one gate located at the bottom of the vertical mold.

10. A method as set forth in claim 9 wherein the insert comprises at least two tabs and wherein only one gate is positioned in between two adjacent tabs.

11. A method as set forth in claim 8 wherein the flow rate of the material poured into the vertical mold is such that turbulent flow is avoided.

12. A method as set forth in claim 1 further comprising a layer comprising at least one of particles, flakes, or fibers over a portion of the insert.

13. A method as set forth in claim 1 further comprising treating at least a portion of the insert so that molten material comprising a metal does not wet the portion of the insert and bond thereto upon solidification.

14. A method comprising:

providing an insert comprising at least one bent tab portion; and

positioning the insert in one of a first mold portion or a second mold portion of a vertical mold using the bent tab portion of the insert to at least partially assist in holding the insert in place in a vertical position wherein the bent tab portion hangs on and is supported by the first mold portion or the second mold portion.

15. A method comprising:

loading an insert into a setting fixture, the insert comprising an annular body portion having a flat portion extending radially, and a tab extending radially inward or outward from the flat portion and wherein the tab comprises at least one bent tab portion; and

using the setting fixture to load the insert into a first mold portion of a mold for casting metal.

16. A method as set forth in claim 15 wherein the setting fixture comprises a vacuum component.

17. A method as set forth in claim 15 wherein the setting fixture comprises at least one ejector pin.