公开(公告)号：US20180214935A1

公开(公告)日：2018-08-02

申请号：US15879527

申请日：2018-01-25

Applicant: ROLLS-ROYCE plc ,  ROSS CERAMICS LTD

Inventor： Aleksander M. CENDROWICZ ,  Graham J. BING ,  Stewart T. WELCH

IPC: B22C9/10 ,  B22C9/24 ,  B22C7/02 ,  B22C9/04

CPC classification number: B22C9/108 ,  B22C7/02 ,  B22C9/04 ,  B22C9/103 ,  B22C9/24 ,  B22C21/14 ,  F01D5/187 ,  F05D2230/211 ,  F05D2240/304 ,  F05D2240/307

Abstract: Described is a ceramic core for producing cast component for a gas turbine engine, the core comprising: a first cavity forming member; a second member adjacent to or opposite the first cavity forming member; and a removable web which joins the first and second members.

公开(公告)号：US20180345357A1

公开(公告)日：2018-12-06

申请号：US15996915

申请日：2018-06-04

Applicant: ROLLS-ROYCE plc

Inventor： Aleksander M. CENDROWICZ ,  Stewart T. WELCH ,  Paul J. WILSON

IPC: B22C7/02 ,  B22C9/10 ,  B22C9/24

Abstract: For forming a shell mould for investment casting, first and second core components are provided. These are formed of ceramic material. The core components are assembled together for manufacturing a wax pattern containing the core component for formation of a shell mould for investment casting. The core components have an arrangement of precursor location features. The method includes machining at least one of the precursor location features to a required shape to provide an arrangement of final location features. The core components are then positioned with respect to each other and/or with respect to a wax pattern die by contacting the arrangement of final location features with corresponding positioning features of a receiving device and/or the wax pattern die.

公开(公告)号：US20180272604A1

公开(公告)日：2018-09-27

申请号：US15927268

申请日：2018-03-21

Applicant: ROLLS-ROYCE plc

Inventor： Stewart T. WELCH

IPC: B29C64/214 ,  B05C11/06 ,  B05C11/04 ,  B29C64/153

CPC classification number: B29C64/214 ,  B05C11/045 ,  B05C11/06 ,  B29C64/153 ,  B33Y10/00 ,  B33Y30/00

Abstract: An additive layer manufacturing apparatus comprising a doctor blade (57) having a tip (51) which, in use, is arranged proximal to a material layer (59) to be recoated during an additive layer manufacturing method, the doctor blade (57) having a cavity (50) with an inlet and an outlet, the outlet located at the tip (51) and the inlet connectable to an air supply (53) whereby air can be directed through the cavity (50) to the outlet and onto a surface (59a) of the material layer (59).

公开(公告)号：US20170326634A1

公开(公告)日：2017-11-16

申请号：US15485629

申请日：2017-04-12

Applicant: ROLLS-ROYCE plc

Inventor： Stewart LOWTH ,  Adam NAGY ,  Stewart T. WELCH

IPC: B22D25/02 ,  B23Q3/08 ,  B22D29/00 ,  B22C9/24 ,  B22C9/10 ,  B28B11/12 ,  B22C7/02

Abstract: A method of providing datum features on a ceramic article including the steps of providing a ceramic member having a plurality of substantially parallel holes extending into the ceramic member. Providing a plurality of tubular mounts, the cross-sectional area of each tubular mount being less than the cross-sectional area of the corresponding hole. Applying adhesive to the exterior surface of each one of the tubular mounts and inserting an adhesive covered tubular mount into each one of the holes. Providing a fixture member having a plurality of substantially parallel projections extending from predetermined positions. Positioning the ceramic member on the fixture member such that each projection locates in one of the tubular mounts and fixes the tubular mounts at the predetermined positions. The ceramic article may be removed from the fixture member or located in a machine tool using the fixture member and machining the ceramic article.

公开(公告)号：US20170225403A1

公开(公告)日：2017-08-10

申请号：US15402717

申请日：2017-01-10

Applicant: ROLLS-ROYCE plc

Inventor： Stewart T. WELCH ,  Robert BOWERMAN

IPC: B29C67/00 ,  B33Y30/00 ,  B33Y40/00

CPC classification number: B33Y40/00 ,  B22F2003/1056 ,  B29C64/124 ,  B29C64/153 ,  B29C64/20 ,  B29C64/214 ,  B29C64/307 ,  B29C64/321 ,  B29C64/40 ,  B33Y30/00 ,  Y02P10/295

Abstract: A doctor device (10, 11) configured for use in recoating in an operating additive layer manufacturing apparatus is configured, in use, to flex on a first sweep across a surface (8a) and remain stiff relative to the flexibility exhibited in the first sweep during a second sweep of the surface.