Coating system and process

• US 9,790,585 B2
• Filed: 07/31/2013
• Issued: 10/17/2017
• Est. Priority Date: 07/31/2012
• Status: Active Grant

• Current Assignee: Rtx Corporation
• Original Assignee: United Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Neal, James W, Litton, David A, Beers, Russell A, Zimmerman, Benjamin Joseph, Maloney, Michael J.
• Primary Examiner(s): MILLER, JR, JOSEPH ALBERT
• Application Number:
  US14/413,726
• Publication Number:
  US 20150203954A1
• Time in Patent Office: 1,539 Days
• Field of Search: None
• CPC Class Codes: C23C 14/042 using masks
• CPC Class Codes: C23C 14/044 using masks to redistribute rather than totally prevent coating, e.g. producing thickness gradient
• CPC Class Codes: C23C 14/30 by electron bombardment
• CPC Class Codes: F05D 2230/313 by physical vapour deposition

Abstract

A coating system for coating a part (10), such as a turbine blade or vane, has a mask (14) positioned adjacent to a first portion (16) of the part (10) to be coated and a mechanism (30) for moving the mask (14) relative to the part (10). The mechanism (30) may be a gear mechanism or a magnetic mechanism.

Claims

1. A coating system comprising:

a mask positioned adjacent to a first portion of a part to be coated, wherein said mask is configured to be cyclically moved from said first portion of said part; and

means for moving said mask relative to the part, wherein said moving means comprises a gear mechanism, said gear mechanism includes one gear that is configured to be counter rotational configured to move said mask back and forth;

wherein said first portion (16) is a leading edge of an airfoil portion of said part and said gear mechanism is configured to move said mask from a position adjacent said leading edge to a position adjacent a suction side of said airfoil portion between 5 to 20 rotations of the part about a longitudinal axis thereof.

2. The coating system of claim 1, wherein said mask is indexable.

3. The coating system of claim 1, wherein said mask is indexable.

4. The coating system of claim 1, wherein said mask is moved away from said first portion a distance as slight as a width of said mask.

5. The coating system of claim 1, wherein said mask and said part rotate at different speeds.