Equipment for plasma spray with liquid injection

Patent metadata

Field	Value
Publication number	US-10793942-B2
Application number	US-201715667161-A
Country	US
Kind code	B2
Filing date	Aug 2, 2017
Priority date	Mar 10, 2014
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A plasma spray system including a turntable subsystem operable to position a multiple of work pieces on a respective multiple of workpiece mounts; a plasma spray subsystem operable to plasma spray the multiple of work pieces on said turntable subsystem; and an overspray wash subsystem operable to wash the multiple of work pieces on said turntable subsystem subsequent to plasma spray of the multiple of work pieces.

First claim

What is claimed is:

1. A method of plasma spraying a multiple of workpieces comprising:
rotating a turntable subsystem about a central axis, the turntable subsystem with a multiple of workpieces on a respective multiple of workpiece mounts, each of the multiple of workpiece mounts rotatable about a respective axis parallel to the central axis;
plasma spraying each of the multiple of workpieces with a plasma spray subsystem as the turntable subsystem rotates about the central axis;
locating a deflector along the central axis preventing plasma spray deposition on workpieces other than the one directly in front of the plasma spray subsystem; and
washing each of the multiple of workpieces sequentially with an overspray wash subsystem as the turntable subsystem rotates about the central axis, the overspray wash subsystem positioned around the turntable subsystem with respect to the plasma spray subsystem by about thirty to three hundred and thirty (30-330) degrees of said turntable subsystem rotation.

2. The method as recited in claim 1 , further comprising:
washing the multiple of workpieces as the turntable subsystem rotates with dry ice.

3. The method as recited in claim 1 , further comprising:
stopping the turntable subsystem to rotate each of the respective multiple of workpiece mounts while plasma spraying each of the multiple of workpieces.

4. The method as recited in claim 1 , further comprising:
cooling each of the multiple of workpieces as the turntable subsystem rotates.

5. The method as recited in claim 1 , further comprising:
rotating the plasma spray subsystem between at least two of a multiple of turntable subsystems.

6. The method as recited in claim 5 , further comprising:
loading/unloading the turntable subsystem while plasma spraying the multiple of workpieces of another of the multiple of turntable subsystems.

7. The method as recited in claim 1 , wherein the deflector comprises a multi sided deflector in which the number of sides coincides with the number of workpiece positions on the turntable.

8. The method as recited in claim 1 , further comprising exhausting from a collection subsystem through the deflector.

9. The method as recited in claim 8 , wherein the collection subsystem comprises a wall collector opposite the plasma spray subsystem to facilitate collection of plasma overspray.

10. The method as recited in claim 9 , wherein the collection subsystem removes micron sized powders generated by the plasma spray subsystem.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Hazel Brian T
• Depalma Joseph A
• Serra Jessica L
• Thayer Henry H
• Blankenship Donn R
• Bochiechio Mario P
• Zajchowski Paul H

Classifications

• B05B13/0431

  with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to three-dimensional [3D] surfaces · CPC title

• B05B7/22

  electrically {, magnetically or electromagnetically}, e.g. by arc {(B05B7/20 takes precedence)} · CPC title

• B05B13/0257

  in a moving container, e.g. a rotatable foraminous drum · CPC title

• C23C4/134 Primary

  Plasma spraying · CPC title

• B05B13/0228

  the movement of the objects being rotative (B05B13/0242 takes precedence) · CPC title