Provisional retention of metal sheet on a mold by microwelds
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-045/14
B29C-045/00
B29C-070/78
B29C-033/14
B29K-101/00
B29K-307/04
B29K-309/08
B29L-009/00
B29L-031/00
출원번호
US-0478152
(2014-09-05)
등록번호
US-9943999
(2018-04-17)
우선권정보
EP-13183410 (2013-09-06)
발명자
/ 주소
Hannecart, Benoit
출원인 / 주소
SAFRAN AERO BOOSTERS SA
대리인 / 주소
Walton, James E.
인용정보
피인용 횟수 :
0인용 특허 :
1
초록▼
The present application relates to a method of injection molding a resin such as a RTM mold. The method enables to manufacture a composite part comprising a resin body and a sheet or strip, forming a surface of the composite part. The composite part can be an annular compressor casing of an axial tu
The present application relates to a method of injection molding a resin such as a RTM mold. The method enables to manufacture a composite part comprising a resin body and a sheet or strip, forming a surface of the composite part. The composite part can be an annular compressor casing of an axial turbomachine, with a composite annular wall. The method includes the steps of: (a) placing and holding the sheet against a mold surface by fastening means such as welds or microwelds; (b) injection and solidification of the resin in the mold so as to form the body by binding it to the sheet; (c) release of the sheet by the fastening means when a release force is exerted on the composite and release part of the composite part.
대표청구항▼
1. A method of manufacturing a composite part, said composite part including: a resin body,a sheet,a surface formed by the sheet and the resin body,the method of manufacturing comprising the following steps:(a) placement of the sheet against a surface of a mold;(b) injection and solidification of th
1. A method of manufacturing a composite part, said composite part including: a resin body,a sheet,a surface formed by the sheet and the resin body,the method of manufacturing comprising the following steps:(a) placement of the sheet against a surface of a mold;(b) injection and solidification of the resin in the mold so as to form the body by binding it to the sheet; and(c) removing the composite part;wherein step (a) comprises:fastening the sheet on the surface of the mold with fastening means configured to hold the sheet during step (b), and for releasing the sheet at step (c) when a release force is exerted on the composite part said force exerted on the composite part breaking the fastening means,wherein the composite part is an annular outer casing with an internal annular surface, the sheet being an annular metal sheet forming partially the internal annular surface. 2. The method according to claim 1, wherein the fastening means comprises one or more of the following: welding;microwelding;electrical resistance welding;brazing;gluing;stapling; andscrewing. 3. The method according to claim 1, wherein the fastening means are configured to release the sheet by breaking said fastening means when a force comprised between 100 N/m and 10,000 N/m of sheet is applied to the sheet in the releasing direction. 4. The method according to claim 1, wherein the fastening means are configured such that the fastening of the sheet to the surface of the mold is weaker than with the body after solidification of the resin. 5. The method according to claim 1, wherein the mold includes a surface which is incurved or cambered, and wherein the sheet of step (a) is initially generally flat and flexible and is bent on the incurved or cambered surface of the mold. 6. The method according to claim 1, wherein before step (b), the method comprises: a step (b−3) prior to step (b), of placing a fibrous preform into the mold overlying the sheet, such that the preform extends in the majority of the volume of body of the composite part. 7. The method according to claim 6, further comprising: a step (b−1) between the step (b−3) and step (b), during which the preform presses the sheet against the surface of the mold. 8. The method according to claim 6, wherein the fibrous preform comprises: a stack of fiber plies, the plies being optionally woven. 9. The method according to claim 6, wherein the fiber preform comprises: carbon fibers and/or glass fibers, the preform being optionally pre-impregnated by a resin. 10. The method according to claim 1, wherein the sheet comprises: a strip shape with a main extension axis, the fastening means forming a row along to the main extension axis. 11. The method according to claim 1, wherein the fastening means comprises: a general width between one of the following ranges:0.001 mm and 20.00 mm;0.005 mm and 2 mm; and0.010 mm and 0.05 mm. 12. The method according to claim 1, wherein the internal annular surface has a varying radius, the sheet comprising: a plurality of perforations distributed over the surface thereof. 13. The method according to claim 1, wherein the annular outer casing is an annular outer casing half bounded by an axially extending plane. 14. The method according to claim 13, wherein the annular outer casing half comprises annular flanges and axial flanges extending radially. 15. The method according to claim 1, wherein the composite part is an axial compressor annular outer casing. 16. The method according to claim 13, wherein it further comprises a step of applying an abradable sealing material against the annular metal sheet. 17. A method of manufacturing a composite part, said composite part including: a resin body,a sheet,a surface formed by the sheet and the resin body,the method of manufacturing comprising the following steps:(a) placement of the sheet against a surface of a mold;(b) injection and solidification of the resin in the mold so as to form the body by binding it to the sheet; and(c) removing the composite part;wherein step (a) comprises:fastening the sheet on the surface of the mold with weldings configured to hold the sheet during step (b), and for releasing the sheet at step (c) when a release force is exerted on the composite part,wherein the composite part is an annular outer casing with an internal annular surface, and wherein the method further comprises a step of applying an abradable sealing material against the sheet. 18. The method according to claim 17, wherein at step (c) the welding forms a welding residue which remains on the mold surface after releasing the sheet. 19. A method of manufacturing a composite part, said composite part including: a resin body,a sheet,a surface formed by the sheet and the resin body,the method of manufacturing comprising the following steps:(a) placement of the sheet against a surface of a mold;(b) injection and solidification of the resin in the mold so as to form the body by binding it to the sheet; and(c) removing the composite part;wherein step (a) comprises:fastening the sheet on the surface of the mold with gluing configured to hold the sheet during step (b), and for releasing the sheet at step (c) when a release force is exerted on the resin body remotely from the gluing,wherein the composite part is an annular outer casing with an internal annular surface, the sheet forming partially the internal annular surface.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (1)
Lemelson Jerome H. (85 Rector St. Metuchen NJ 08840), Apparatus for coding articles.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.