METHOD OF MANUFACTURING GAS TURBINE ENGINE ELEMENT HAVING AT LEAST ONE ELONGATED OPENING |
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| 申请号 | US14338480 | 申请日 | 2014-07-23 | 公开(公告)号 | US20160024966A1 | 公开(公告)日 | 2016-01-28 |
| 申请人 | Pratt & Whitney Canada Corp.; | 发明人 | Marc CAMPOMANES; Orlando SCALZO; Bruno CHATELOIS; | ||||
| 摘要 | A method of manufacturing a gas turbine engine element, for example a shroud segment. An insert has at least one elongated feature received in a mold cavity. A powder injection molding feedstock is injected. When the green part is disengaged from the mold, each elongated feature is slid out of the green part to define a respective elongated passage. The cross-sectional dimension of the elongated feature may be 0.020 inches or less, and/or a ratio between the length and cross-sectional dimension of the elongated feature may be at least 25. The method may include, after debinding and sintering, projecting a coating material while defining an obstruction between source of coating material and the open end of each elongated feature with a shoulder of the element to prevent the coating material from reaching the open end, followed by machining to remove at least a part of the shoulder. | ||||||
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