Method of manufacturing metal castings

Patent metadata

Field	Value
Publication number	US-10898948-B2
Application number	US-201916376667-A
Country	US
Kind code	B2
Filing date	Apr 5, 2019
Priority date	Apr 5, 2019
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A method of manufacturing an aluminum alloy cylinder head includes providing a precision sand core and mold assembly, a liquid aluminum alloy delivery system, and a mold manipulator system. The precision sand core and mold assembly is disposed in the mold manipulator system and the liquid aluminum alloy delivery system includes an in-furnace ultrasonic actuator and a launder tube having at least an ultrasonic actuator. The liquid aluminum alloy delivery system is sealed to the precision sand core and mold assembly and provides liquid aluminum alloy into a gating system of the precision sand core and mold assembly. The precision sand core and mold assembly is rotated approximately 180°. The precision sand core and mold assembly is vibrated.

First claim

The following is claimed:

1. A method of manufacturing an aluminum alloy cylinder head, the method comprising:
providing a precision sand core and mold assembly having a head deck face chill, a piston core, and a gate shut-off core, a liquid aluminum alloy delivery system, and a mold manipulator system, and wherein the precision sand core and mold assembly is disposed in the mold manipulator system;
sealing the liquid aluminum alloy delivery system to the precision sand core and mold assembly and providing liquid aluminum alloy into a gating system of the precision sand core and mold assembly;
rotating the precision sand core and mold assembly approximately 180°; and
vibrating the precision sand core and mold assembly.

2. The method of claim 1 wherein providing a precision sand core and mold assembly, a liquid aluminum alloy delivery system, and a mold manipulator system, and wherein the precision sand core and mold assembly is disposed in the mold manipulator system further comprises providing the precision sand core and mold assembly, the liquid aluminum alloy delivery system having an in-furnace ultrasonic actuator and a launder tube having an ultrasonic actuator, and the mold manipulator system, and wherein the precision sand core and mold assembly is disposed in the mold manipulator system.

3. The method of claim 1 wherein providing a precision sand core and mold assembly having a head deck face chill, a piston core, and a pate shut-off core, a liquid aluminum alloy delivery system, and a mold manipulator system, and wherein the precision sand core and mold assembly is disposed in the mold manipulator system further comprises providing the precision sand core and mold assembly having a head deck face chill, a piston core, and a gate shut-off core, the liquid aluminum alloy delivery system, and the mold manipulator system having a vibration mechanism, a gate shut-off core actuator and a piston core actuator, and wherein the precision sand core and mold assembly is disposed in the mold manipulator system.

4. The method of claim 3 further comprising energizing the gate shut-off core actuator to insert the gate shut-off core into the gating system of the precision sand core and mold assembly sealing the gating system.

5. The method of claim 4 further comprising actuating the piston core actuator to release the piston core to fall into the gating system applying pressure to the liquid aluminum alloy in the gating system.

6. The method of claim 5 further comprising removing the head deck face chill from the precision sand core and mold assembly.

7. The method of claim 6 further comprising quenching a head deck face of the aluminum alloy cylinder head with one of a water spray and a forced air.

8. A method of manufacturing an aluminum alloy cylinder head, the method comprising:
providing a precision sand core and mold assembly having a head deck face chill, a piston core, and a gate shut-off core, a liquid aluminum alloy delivery system, and a mold manipulator system, and wherein the precision sand core and mold assembly is disposed in the mold manipulator system having a vibration mechanism, a gate shut-off core actuator and a piston core actuator and the liquid aluminum alloy delivery system includes an in-furnace ultrasonic actuator and a launder tube having at least an ultrasonic actuator;
sealing the liquid aluminum alloy delivery system to the precision sand core and mold assembly and providing liquid aluminum alloy into a gating system of the precision sand core and mold assembly;
rotating the precision sand core and mold assembly approximately 180°; and
vibrating the precision sand core and mold assembly.

9. The method of claim 8 further comprising energizing the gate shut-off core actuator to insert the gate shut-off core into the gating system of the precision sand core and mold assembly sealing the gating system.

10. The method of claim 9 further comprising actuating the piston core actuator to release the piston core to fall into the gating system applying pressure to the liquid aluminum alloy in the gating system.

11. The method of claim 10 further comprising removing the head deck face chill from the precision sand core and mold assembly.

12. The method of claim 11 further comprising quenching a head deck face of the aluminum alloy cylinder head with one of a water spray and a forced air.

13. A method of manufacturing an aluminum alloy cylinder head, the method comprising:
providing a precision sand core and mold assembly, a liquid aluminum alloy delivery system, and a mold manipulator system, and wherein the precision sand core and mold assembly is disposed in the mold manipulator system, the precision sand core and mold assembly includes a head deck face chill, a piston core, and a gate shut-off core, the liquid aluminum alloy delivery system includes an in-furnace ultrasonic actuator and a launder tube having at least an ultrasonic actuator, and the mold manipulator system includes a vibration mechanism, a gate shut-off core actuator and a piston core actuator;
sealing the liquid aluminum alloy delivery system to the precision sand core and mold assembly and providing liquid aluminum alloy into a gating system of the precision sand core and mold assembly;
rotating the precision sand core and mold assembly approximately 180°;
vibrating the precision sand core and mold assembly;
energizing the gate shut-off core actuator to insert the gate shut-off core into the gating system of the precision sand core and mold assembly sealing the gating system; and
actuating the piston core actuator to release the piston core to fall into the gating system applying pressure to the liquid aluminum alloy in the gating system.

14. The method of claim 13 further comprising removing the head deck face chill from the precision sand core and mold assembly.

15. The method of claim 14 further comprising quenching a head deck face of the aluminum alloy cylinder head with one of a water spray and a forced air.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Wang Qigui
• Cogan Christopher D
• Walker Michael J
• Degrace Garrold
• Gustafson Thomas
• Gerard Dale

Classifications

• B22C9/08

  Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates · CPC title

• B22C23/00

  Tools; Devices not mentioned before for moulding · CPC title

• B22D29/00

  Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots {(B22D13/10, B22D11/124, B22D17/00 take precedence)} · CPC title

• B22D27/08

  Shaking, vibrating, or turning of moulds · CPC title

• B22C9/02 Primary

  Sand moulds or like moulds for shaped castings · CPC title