In-line pressurization chamber for casting

Patent metadata

Field	Value
Publication number	US-11772156-B2
Application number	US-202117153049-A
Country	US
Kind code	B2
Filing date	Jan 20, 2021
Priority date	Jan 20, 2021
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

Methods and systems are provided for continuously producing cast metal components. An exemplary method includes feeding molten metal into a first mold at a fill station; maintaining a pressurized chamber at an elevated pressure; moving the first mold into the pressurized chamber, wherein the molten metal solidifies in the first mold under the elevated pressure; and removing the first mold from the pressurized chamber.

First claim

What is claimed is:

1. A method for continuously producing cast metal components, comprising:
feeding molten metal into a first mold at a fill station;
providing a pressurized chamber including an upstream terminal chamber section, a central chamber section, and a downstream terminal section;
maintaining the central chamber section of the pressurized chamber at an elevated pressure;
moving the first mold from the fill station into the upstream terminal chamber section of the pressurized chamber;
sealing the upstream terminal chamber section of the pressurized chamber;
pressurizing the upstream terminal chamber section of the pressurized chamber;
moving the first mold from the upstream terminal chamber section to the central chamber section;
moving the first mold from the central chamber section to the downstream terminal chamber section, wherein the molten metal solidifies in the first mold under the elevated pressure; and
removing the first mold from the downstream terminal chamber section of the pressurized chamber.

2. The method of claim 1 wherein the method is performed in a casting line, and wherein the pressurized chamber moves in the casting line.

3. The method of claim 1 wherein the pressurized chamber is stationary.

4. The method of claim 1 wherein the method is performed in a carousel casting line.

5. The method of claim 1 wherein the method is performed in a casting line including, sequentially, a mold assembly station, the fill station, upstream terminal chamber section, the central chamber section, the downstream terminal chamber section, and a casting/mold disassembly station.

6. The method of claim 5 further comprising:
assembling the first mold at the mold assembly station;
moving the first mold to the fill station where the molten metal is fed into the first mold and assembling a second mold at the mold assembly station;
moving the first mold to the upstream terminal chamber section and moving the second mold to the fill station where the molten metal is fed into the second mold;
sealing the upstream terminal chamber section and increasing pressure in the upstream terminal chamber section to the elevated pressure of the central chamber section;
opening fluid communication between the central chamber section and the upstream terminal chamber section and transferring the first mold from the upstream terminal chamber section to the central chamber section;
sealing the central chamber section;
moving the second mold to the upstream terminal chamber section;
sealing the upstream terminal chamber section and increasing pressure in the upstream terminal chamber section to the elevated pressure of the central chamber section;
opening fluid communication between the central chamber section and the upstream terminal chamber section and transferring the second mold from the upstream terminal chamber section to the central chamber section;
opening fluid communication between the central chamber section and the downstream terminal chamber section and transferring the first mold from the upstream terminal chamber section to the downstream terminal chamber section;
transferring the first mold from the downstream terminal chamber section to the casting/mold disassembly station;
sealing the downstream terminal chamber section and increasing pressure in the downstream terminal chamber section to the elevated pressure of the central chamber section;
opening fluid communication between the central chamber section and the downstream terminal chamber section and transferring the second mold from the central chamber section to the downstream terminal chamber section;
disassembling the first mold and first casting formed therein at the casting/mold disassembly station;
transferring the second mold from the downstream terminal chamber section to the casting/mold disassembly station; and
disassembling the second mold and second casting formed therein at the casting/mold disassembly station.

7. An in-line casting system comprising:
a mold assembly station for assembling a mold;
a fill station for filling the mold with molten metal;
a pressurization station for densifying the molten and/or semi-solid metal under an elevated pressure, wherein the pressurization station comprises a series of chambers including a first chamber and a second chamber; and
a casting/mold disassembly station for disassembling the mold and a casting formed therein.

8. The in-line casting system of claim 7 , wherein the series further includes a third chamber, wherein the first chamber is a pre-pressurization chamber section, wherein the second chamber is a pressurized chamber, and wherein the third chamber is a pressure-release chamber.

9. The in-line casting system of claim 8 , wherein the pressurization station is configured to simultaneously hold a first mold, a second mold, and a third mold.

10. The in-line casting system of claim 7 , wherein the series further includes a third chamber, wherein the first chamber is a pre-pressurization chamber, wherein the second chamber is a constant elevated pressure chamber, and wherein the third chamber is a pressure-release chamber.

11. The in-line casting system of claim 7 , further comprising a pressure gauge and valve to monitor pressure in the pressurization station and to selectively add a medium to the pressurization station.

12. The in-line casting system of claim 7 , wherein the mold assembly station, fill station, pressurization station, and casting/mold disassembly station are arranged in a linear casting line.

13. The in-line casting system of claim 7 , wherein the mold assembly station, fill station, pressurization station, and casting/mold disassembly station are arranged in a carrousel casting line.

14. The in-line casting system of claim 7 , further comprising a control module and a sensor, wherein the sensor is arranged to monitor readiness of the pressurization station, and wherein the control module directs filling the mold at the fill station when the pressurization station is ready.

15. The in-line casting system of claim 7 , further comprising a control module and a sensor, wherein the control module and the sensor are configured to maintain a constant elevated pressure in the second chamber.

16. The in-line casting system of claim 7 , further comprising a transfer convey configured to move the mold from the first chamber to the second chamber.

17. An in-line continuous casting system comprising:
a mold assembly station for assembling a mold;
a fill station for filling the mold with molten metal;
a pressurization chamber for densifying the molten and/or semi-solid metal under an elevated pressure higher than a pressure in a surrounding environment, wherein the pressurization chamber includes an upstream terminal chamber section, a central chamber section, and a downstream terminal chamber section, wherein the terminal chamber sections are configured to be selectively sealed from the surrounding environment, and wherein the central chamber section is configured to be selectively sealed from the terminal chamber sections;
a high thermal conductivity medium source for providing the pressurization chamber with a desired medium; and
a casting/mold disassembly station for disassembling the mold and a casting formed therein.

18. The in-line continuous casting system of claim 17 , further comprising a control module and a sensor, wherein the control module and the sensor are configured to maintain a constant elevated pressure in the central chamber section.

19. The in-line

Assignees

• Gm Global Tech Operations Llc

Inventors

• Wang Qigui
• Gustafson Thomas W
• Burkholder Steven L
• Wilson Daniel J
• Melekian Gregory

Classifications

• B22D47/02 Primary

  for both moulding and casting · CPC title

• B22D27/13 Primary

  making use of gas pressure · CPC title

• B22D21/007 Primary

  with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C · CPC title

• B22D46/00

  Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons (controlling or regulating in general G05) · CPC title

• B22D2/00

  Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass · CPC title