DK171948B1 - Method and mould for producing hollow sections, principally wind generator vanes, in a fibre-reinforced matrix such as glass fibre - Google Patents
Method and mould for producing hollow sections, principally wind generator vanes, in a fibre-reinforced matrix such as glass fibre Download PDFInfo
- Publication number
- DK171948B1 DK171948B1 DK128194A DK128194A DK171948B1 DK 171948 B1 DK171948 B1 DK 171948B1 DK 128194 A DK128194 A DK 128194A DK 128194 A DK128194 A DK 128194A DK 171948 B1 DK171948 B1 DK 171948B1
- Authority
- DK
- Denmark
- Prior art keywords
- profile
- mold
- fiber
- hinge line
- reinforced matrix
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/20—Opening, closing or clamping
- B29C33/26—Opening, closing or clamping by pivotal movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Wind Motors (AREA)
Description
i DK 171948 B1in DK 171948 B1
Den foreliggende opfindelse angår en fremgangsmåde og en form til fremstilling af hule profiler fortrinsvis vindmøllevinger i fiberforstærket matrix såsom glasfiber.The present invention relates to a method and a mold for making hollow profiles preferably wind turbine blades in fiber reinforced matrix such as fiberglass.
5 Møllevinger fremstilles sædvanligvis i forme, hvor vingeprofilets over- og underside fremstilles hver for sig ved pålægning af glasfiberarmering i de respektive forme, og hvor de to halvdele efter hærdning efterfølgende sammenføjes. I det færdige produkt forekommer der 10 således en afbrydelse af fiberarmeringen i samlingsområdet, hvilket er en svækkelse af styrken.Mill blades are usually made in molds where the upper and lower sides of the blade profile are made separately by the application of fiberglass reinforcement in the respective molds and the two halves are subsequently joined together after curing. Thus, in the finished product, there is an interruption of the fiber reinforcement in the joint area, which is a weakening of the strength.
Inden de to halvdele kan sammenføjes, skal der imidlertid først foretages en planslibning af profilernes anlægsflader, således at disse kan presses imod 15 hinanden og limes med optimal pasning.However, before the two halves can be joined together, a plane grinding of the contact surfaces of the profiles must first be made so that these can be pressed against each other and glued with optimal fit.
Efter hærdning efterpudses profilets samlingskanter og flader i al almindelighed til opnåelse af et glat profil, således at møllevingen over det meste af fladen vil have en laminar vindstrømning.After curing, the joint edges and surfaces of the profile are generally repainted to obtain a smooth profile so that the milling blade will have a laminar wind flow over most of the surface.
20 Det har imidlertid vist sig, at de færdige vinge prof iler ved påvirkning af vindkræfter, der udvirker både en bøjning og vridning af vingeprofilet, udviser en svaghed netop ved disse samlinger, en svaghed der i den sidste ende vil kunne føre til brud på vingen i området 25 ved samlingerne. Et yderligere nedbrydende moment er også det næsten altid foregående slid på vingen, der forårsages af større eller mindre vindbårne partikler såsom sandskorn.20 However, it has been found that the finished wing profiles, with the influence of wind forces that effect both a bending and twisting of the wing profile, exhibit a weakness precisely at these joints, a weakness which could eventually lead to wing breakage. in the area 25 at the joints. A further degrading torque is also the almost always-on wear of the blade caused by larger or smaller wind-borne particles such as sand grains.
Det er erkendt, at den beskrevne måde til sammen-30 føjning af glasfiberemner med hinanden i almindelighed har en sådan svaghed, men at sammenføjningsmetoden er brugbar, hvis de pågældende sammenføjninger ikke udsættes for uforholdsmæssigt store belastninger. Ideelt tilstræbes der samlinger, der har samme hårdhed og flek-35 sibilitet som resten af konstruktionen, hvilket ikke er 2 DK 171948 B1 opnået ved den ovenfor beskrevne fremgangsmåde, da limningen ikke omfatter gennemgående fibre, der kan tilføre samlingen både den fornødne fleksibilitet og styrke.It is recognized that the described method of joining fiberglass blanks with each other generally has such weakness, but that the joining method is useful if the joints in question are not subjected to excessive loads. Ideally, joints having the same hardness and flexibility as the rest of the structure are sought, which is not achieved by the method described above, since the bonding does not include through-going fibers which can provide the joint with both the required flexibility and strength. .
Fra DE-A 34 08 916 kendes en fremgangsmåde og en 5 form til samling af færdige skaller af lyshærdende polyester til et hullegeme. Skallerne anbringes oven på hinanden med overlappende kanter i den nederste formhalvdel, hvorefter formen lukkes. De overlappende kanter trykkes sammen ved at introducere trykluft eller en 10 ekspanderende skum i hulheden. Skallernes kantområde er uafhærdede, idet disse har været afdækket med en afdækning, der først fjernes, når skallerne skal samles.DE-A 34 08 916 discloses a method and a mold for assembling finished shells of light-curing polyester into a hollow body. The shells are placed on top of each other with overlapping edges in the lower mold half, after which the mold is closed. The overlapping edges are compressed by introducing compressed air or an expanding foam into the cavity. The edge areas of the shells are uncured as they have been covered with a cover that is only removed when the shells are to be assembled.
Formålet med den foreliggende opfindelse er at angive en fremgangsmåde og en form til fremstilling af 15 profiler i fiberforstærket matrix, fortrinsvis glasfiber ved hvilken der nemmere kan fremstilles eksempelvis vingeprofiler med en større styrke end hidtil.The object of the present invention is to provide a method and a mold for producing 15 profiles in fiber-reinforced matrix, preferably glass fiber, in which more easily, for example, wing profiles with a greater strength can be produced.
Dette er ifølge opfindelsen opnået ved en fremgangsmåde, ved hvilken formgivningen af et profil finder 20 sted i én arbejdsgang, idet den fiberforstærkede matrix udlægges i en form med mindst en hængsellinie, hvori profilet støbes ud i ét stykke i den oplukkede form, og hvor de to sidekanter, der danner profilets samlingskant, sammenføres ved sammenlukning af formen omkring 25 hængslingslinien, inden den fiberforstærkede matrix er hærdet, og hvilket profil, efter hærdning af den fiberforstærkede matrix, udtages af formen ved åbning af denne omkring hængslingslinien, til eventuel nødvendig efterbehandling.This is achieved according to the invention by a method in which the shaping of a profile takes place in one operation, the fiber-reinforced matrix being laid out in a mold having at least one hinge line, in which the profile is cast in one piece in the opened form and the two side edges forming the joint edge of the profile are joined by closing the mold about the hinge line before the fiber reinforced matrix is cured and which profile, after curing the fiber reinforced matrix, is taken out of the mold by opening it around the hinge line for any necessary finishing.
30 Opfindelsen omfatter tillige en form, der er ejen dommelig derved, at den omfatter i det mindste en ak-sialt orienteret hængsellinie, således at formen kan lukkes sammen, så de indvendige flader i denne danner yderskallen af profilets form.The invention also comprises a mold which is inherently judgmental in that it comprises at least one axially oriented hinge line so that the mold can be closed together so that the inner surfaces thereof form the outer shell of the profile.
35 I henhold til fremgangsmåden og formen ifølge op findelsen opnås et profil med en større styrke, da pro- 3 DK 171948 B1 filet ved formens hængselslinie er ubrudt, og ligesom resten af profilet har en intakt fiberstruktur, der i hele profilets omkreds danner en helstøbt konstruktion med ubrudte fibre. Den bedre styrke understreges tillige 5 af et ensartet hærdesvind i hele konstruktionen, hvor der ved sammenlimning af to dele forekommer et andet hærdesvind i selv sammenføjningen, hvilket stresser konstruktionen.35 According to the method and mold according to the invention, a profile with a greater strength is obtained, since the profile of the profile is unbroken and like the rest of the profile has an intact fiber structure which forms a single cast throughout the profile of the profile. construction with unbroken fibers. The better strength is also emphasized by a uniform curing wind throughout the structure, where, when gluing two parts, another curing wind occurs in the joint itself, which stresses the construction.
Opfindelsen resulterer tillige i større nøjagtig-10 hed, ensartethed i godstykkelse, samt ensartet densitet, hvilket medvirker til et profils modstandsevne specielt over for dynamiske belastninger. De nævnte forhold indvirker tillige positivt på en konstruktions modstand overfor udmattelsesbrud, hvor en konstruktion ifølge 15 opfindelsen er meget bedre end en sammenlimet.The invention also results in greater accuracy, uniformity in thickness, and uniform density, which contributes to the resistance of a profile especially to dynamic loads. The said conditions also have a positive effect on a structural resistance to fatigue fractures, where a structure according to the invention is much better than a bonded one.
Med opfindelsen er det også muligt at gøre bagkanten af et vingeprofil tyndere, hvorved støjen fra vindmøller kan reduceres.With the invention, it is also possible to make the rear edge of a blade profile thinner, thereby reducing the noise from wind turbines.
Den beskrevne fremgangsmåde og formen ifølge op-20 findelsen muliggør endvidere, at profilet kan fremstilles på en langt nemmere måde, da den førnævnte planslibning af anlægsfladerne er undgået.The described method and shape according to the invention further enable the profile to be manufactured in a much easier way, since the aforementioned surface grinding of the abutment surfaces is avoided.
Formen og fremgangsmåden ifølge opfindelsen har vist sig at være særdeles velegnet til fremstilling af 25 især mindre vindmøllevingeprofiler.The form and method of the invention have been found to be particularly suitable for the production of especially small wind turbine blade profiles.
Opfindelsen beskrives i det følgende nærmere med henvisning til tegningen på hvilken fig. 1 er et perspektivbillede af en udklappet form 30 til et vindmøllevingeprofil med udlagt glasfiberarmering med matrix fig. 2 et sidesnit af en sammenklappet form med et vingeprofil, og fig. 3 et tværsnit gennem en masteprofil fremstillet ifølge opfindelsen.The invention will now be described in more detail with reference to the drawing in which: FIG. 1 is a perspective view of a folded out mold 30 for a wind turbine blade profile with laid-out fiberglass reinforcement with matrix; 2 shows a side section of a collapsed shape with a wing profile; and FIG. 3 is a cross-section through a mast profile made in accordance with the invention.
35 4 DK 171948 B135 4 DK 171948 B1
Fig. 1 viser en form 1, der består af to halvdele 2 og 3, der er hængslede til hinanden med et hængsel 4.FIG. 1 shows a form 1 consisting of two halves 2 and 3 hinged to each other by a hinge 4.
Formen 1 er vist i den udslåede stilling, i hvilken glasfiberarmering med matrix 5 til vingeprofilet udlæg-5 ges i flere lag.The mold 1 is shown in the folded position in which fiberglass reinforcement with matrix 5 for the blade profile 5 is laid out in several layers.
Pålægning af glasfiberarmering med matrix 5 foregår over hele fladen i formen 1, dvs. ubrudt over formens hængslingspunkt 4, der, når formens to halvdele 2 og 3 klappes imod hinanden, vil befinde sig ud for vingepro-10 filets forkant.Laying of fiberglass reinforcement with matrix 5 takes place over the entire surface of mold 1, ie. unbroken over the hinge point 4 of the mold which, when the two halves 2 and 3 of the mold are folded against each other, will be off the leading edge of the wing profile 10.
Af hensyn til drejning omkring hængslingslinien vil denne og dermed også vingeprofilets forkant være lige.For the sake of rotation about the hinge line, this one and thus also the leading edge of the blade profile will be straight.
Der vil imidlertid trods alt være behov for en vis efterslibning af profilets forkant, da ombukningen ved 15 hængslingslinien kan afstedkomme mindre ujævnheder.After all, however, some back-grinding of the front edge of the profile will be required, as the bending at the hinge line can cause minor bumps.
Dette kan imidlertid undgås, hvis formen fremstilles med en markant usymmetrisk hængsling, hvor man f.eks. forestiller sig, at hængslingslinien befinder sig uden for profilets forkantområde, eksempelvis tilbagetrukket 1/3 20 af profilets bredde fra forkanten. Behovet for efterslibning af forkanten er på denne måde minimeret, og endvidere opnås der også den fordel, at profilet i hængslingsområdet vil have en forholdsvis jævnere overflade, og samtidigt kan den ubrudte fiberstruktur i hele 25 profilets omkreds bibeholdes.However, this can be avoided if the mold is produced with a markedly asymmetric hinge, where e.g. imagine that the hinge line is outside the leading edge area of the profile, for example retracted 1/3 20 of the profile width from the leading edge. In this way, the need for front edge grinding is minimized, and furthermore, the advantage is obtained that the profile in the hinge area will have a relatively smoother surface, and at the same time the unbroken fiber structure can be retained throughout the entire circumference of the profile.
Fig. 2 viser sammenføringen af profilets to halvdele 5a og 5b ved profilets bagkant 5c-5d. Sammenføringen skal foregå umiddelbart efter, at udlægningen og blødgøringen af glasfiberarmeringen er afsluttet, såle-30 des at denne uden problemer lader sig bøje i området af hængslingslinien 4, der forløber langs hele profilets forkant, og endvidere at glasfiberarmeringen kan sammenføjes ved bagkantens anlægsflader 5c og 5d.FIG. 2 shows the joining of the two halves 5a and 5b of the profile at the rear edge 5c-5d of the profile. The joining must take place immediately after the laying and softening of the fiberglass reinforcement is completed, so that it can easily bend in the area of the hinge line 4 extending along the entire leading edge of the profile, and furthermore that the fiberglass reinforcement can be joined at the rear face surfaces 5c and 5d.
Udlægningen af glasfiberarmering i området, der 35 skal danne profilets bagkant 5c-5d, udføres således, at yderkanterne tilspidses, dvs. gradvist aftager i gods- DK 171948 B1 5 tykkelse ud nod kanten, således at glasfiberarmeringens bagkantområder 5c-5d under sammenklapningen af formen 1 vil blive bragt i tæt kontakt med hinanden over en vis bredde, således at fibre fra de to sider indflettes med 5 hinanden, hvilket har den fordel, at også bagkanten vil antage en homogen glasfiberstruktur i modsætning til samlinger, der udføres på sædvanlig måde, og hvor sammenfletning af fibre ikke finder sted.The laying of fiberglass reinforcement in the area to form the rear edge 5c-5d of the profile is carried out so that the outer edges are tapered, ie. gradually decreases in the thickness of the edge so that the trailing edge regions 5c-5d of the glass fiber reinforcement will be brought into close contact with one another over a certain width during the collapse of the mold 1, so that fibers from the two sides are interlaced with 5 each other , which has the advantage that the trailing edge will also assume a homogeneous fiberglass structure as opposed to joints which are carried out in the usual manner and where fiber interlacing does not occur.
En anden fordel ved støbemetoden ifølge opfindelsen 10 er, at der undgås spændinger i profilet, da hærdningen foregår i profilets færdige form.Another advantage of the molding method of the invention 10 is that stresses in the profile are avoided as the curing takes place in the final shape of the profile.
Umiddelbart før sammenklapningen af de to dele 5a-5b, der danner profilet, vil der kunne indsættes en forstærkningsbjælke (ikke vist) mellem de to profilhalv-15 dele, hvis dette ønskes.Immediately prior to the collapse of the two parts 5a-5b forming the profile, a reinforcing bar (not shown) between the two profile halves may be inserted if desired.
Den beskrevne metode vil også kunne udføres i tilfælde, hvor der kun lægges ét lag glasfiberarmering.The method described can also be carried out in cases where only one layer of fiberglass reinforcement is applied.
Fremgangsmåden ifølge opfindelsen vil med fordel også kunne anvendes til fremstilling af andre profiler 20 såsom sejlskibsmaster som vist i fig. 3, hvor der eksempelvis støbes et U-profil 10, der ifølge den ovenstående fremgangsmåde og form er dannet fra en forholdsvis åben form, og ved omsvingning omkring et symmetripunkt 4 har antaget den viste form, og hvor der i for-25 bindelse med støbeprocessen kan påstøbes en tværgående forstærkningsbjælke 11, hvorpå løbegangen til sejlet kan fastgøres.The method according to the invention can advantageously also be used for the production of other profiles 20 such as sailing ship masts as shown in FIG. 3, for example, casting a U-profile 10, which according to the above method and mold is formed from a relatively open mold, and by turning around a point of symmetry 4 has assumed the mold shown, and in connection with the molding process For example, a transverse reinforcing beam 11 may be cast onto which the barrel of the sail can be secured.
Masteprofilet kan for så vidt fremstilles på samme måde som det ovenfor beskrevne vingeprofil, hvor bag-30 kanterne er ført sammen, idet der for at skaffe adgang til forstærkningsprofilet 11 blot skal foretages en bortskæring af profilets bageste spids, der på tegningen er markeret med stiplet linie.The mast profile can thus be manufactured in the same way as the blade profile described above, where the trailing edges are joined together, in order to provide access to the reinforcement profile 11, only a cut-off of the rear tip of the profile must be made in the drawing marked with dotted line.
Fremgangsmåden og formen ifølge opfindelsen vil 35 også kunne anvendes til fremstilling af andre former for fiberforstærket matrix eksempelvis kulfiber.The process and mold of the invention may also be used to prepare other forms of fiber-reinforced matrix such as carbon fiber.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK128194A DK171948B1 (en) | 1994-11-04 | 1994-11-04 | Method and mould for producing hollow sections, principally wind generator vanes, in a fibre-reinforced matrix such as glass fibre |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK128194A DK171948B1 (en) | 1994-11-04 | 1994-11-04 | Method and mould for producing hollow sections, principally wind generator vanes, in a fibre-reinforced matrix such as glass fibre |
| DK128194 | 1994-11-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK128194A DK128194A (en) | 1996-05-05 |
| DK171948B1 true DK171948B1 (en) | 1997-08-25 |
Family
ID=8103077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK128194A DK171948B1 (en) | 1994-11-04 | 1994-11-04 | Method and mould for producing hollow sections, principally wind generator vanes, in a fibre-reinforced matrix such as glass fibre |
Country Status (1)
| Country | Link |
|---|---|
| DK (1) | DK171948B1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004043679A1 (en) * | 2002-11-12 | 2004-05-27 | Lm Glasfiber A/S | Mould assembly with closure mechanism |
| WO2008062325A3 (en) * | 2006-11-20 | 2008-10-30 | Tamicare Ltd | Method and apparatus for producing a product using a bendable mold shell |
| WO2012010331A1 (en) | 2010-07-21 | 2012-01-26 | Siemens Aktiengesellschaft | Mould assembly and method of closing a mould assembly |
| EP2508321A1 (en) | 2011-04-04 | 2012-10-10 | Siemens Aktiengesellschaft | Mould part, mould assembly and method of closing a mould assembly |
| CN103108744A (en) * | 2010-08-11 | 2013-05-15 | 维斯塔斯风力系统有限公司 | Apparatus for fabricating a wind turbine blade and related method |
| US8770966B2 (en) | 2005-11-08 | 2014-07-08 | Lm Glasfiber A/S | Mould assembly with hinge mechanism and method for closing a mould assembly |
| EP3403814A1 (en) * | 2017-04-25 | 2018-11-21 | Airbus Operations Limited | Fibre reinforced composite aerofoil structures |
| DE102017119797A1 (en) * | 2017-08-29 | 2019-02-28 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Method and mold for producing a fiber composite hollow body |
-
1994
- 1994-11-04 DK DK128194A patent/DK171948B1/en not_active IP Right Cessation
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7223091B2 (en) | 2002-11-12 | 2007-05-29 | Lm Glasfiber A/S | Mould assembly with closure mechanism |
| WO2004043679A1 (en) * | 2002-11-12 | 2004-05-27 | Lm Glasfiber A/S | Mould assembly with closure mechanism |
| US8770966B2 (en) | 2005-11-08 | 2014-07-08 | Lm Glasfiber A/S | Mould assembly with hinge mechanism and method for closing a mould assembly |
| WO2008062325A3 (en) * | 2006-11-20 | 2008-10-30 | Tamicare Ltd | Method and apparatus for producing a product using a bendable mold shell |
| US7700030B2 (en) | 2006-11-20 | 2010-04-20 | TamiCare, Ltd. | Method and apparatus for producing a product using a bendable mold shell |
| US9102082B2 (en) | 2010-07-21 | 2015-08-11 | Siemens Aktiengesellschaft | Mould assembly and method of closing a mould assembly |
| WO2012010331A1 (en) | 2010-07-21 | 2012-01-26 | Siemens Aktiengesellschaft | Mould assembly and method of closing a mould assembly |
| CN103108744A (en) * | 2010-08-11 | 2013-05-15 | 维斯塔斯风力系统有限公司 | Apparatus for fabricating a wind turbine blade and related method |
| CN103108744B (en) * | 2010-08-11 | 2016-07-06 | 维斯塔斯风力系统有限公司 | For manufacturing the Apparatus for () and method therefor of wind turbine blade |
| EP2508321A1 (en) | 2011-04-04 | 2012-10-10 | Siemens Aktiengesellschaft | Mould part, mould assembly and method of closing a mould assembly |
| US8814558B2 (en) | 2011-04-04 | 2014-08-26 | Siemens Aktiengesellschaft | Mould part, mould assembly and method of closing a mould assembly |
| EP3403814A1 (en) * | 2017-04-25 | 2018-11-21 | Airbus Operations Limited | Fibre reinforced composite aerofoil structures |
| US11091245B2 (en) | 2017-04-25 | 2021-08-17 | Airbus Operations Limited | Fibre reinforced composite aerofoil structures |
| DE102017119797A1 (en) * | 2017-08-29 | 2019-02-28 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Method and mold for producing a fiber composite hollow body |
Also Published As
| Publication number | Publication date |
|---|---|
| DK128194A (en) | 1996-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2003200918B2 (en) | A method for the manufacture of a component by composite fibre construction | |
| JP5583969B2 (en) | Method for making a composite fiber component using a foldable molded core and the molded core | |
| CN103291536B (en) | Blade insert and associated method for wind turbine rotor blade | |
| US4732542A (en) | Large airfoil structure and method for its manufacture | |
| US9050786B2 (en) | Method of manufacturing an elongated composite structure | |
| DK171948B1 (en) | Method and mould for producing hollow sections, principally wind generator vanes, in a fibre-reinforced matrix such as glass fibre | |
| JP4015703B2 (en) | Composite tip cap assembly for helicopter main rotor blades | |
| CN113423550B (en) | Improvements relating to wind turbine blade manufacture | |
| CN106194575B (en) | Wind turbine blade and method of moulding a wind turbine blade tip section | |
| US20070161483A1 (en) | Stiffening element and a method for manufacturing of a stiffening elememt | |
| CN88103525A (en) | Composite material blade and manufacturing process thereof | |
| KR20110115958A (en) | Method for manufacturing a wind turbine rotor blade and wind turbine rotor blade | |
| US4247255A (en) | Composite rotor blade root end | |
| PL190678B1 (en) | Apparatus for making rotor blades | |
| CN106471246A (en) | Section bar wedge for the attachment of aerodynamic housing extension | |
| CN108495739B (en) | Method and apparatus for manufacturing a wind turbine blade body | |
| EP3071404B1 (en) | A system and method for manufacturing a wind turbine blade component | |
| US20150252780A1 (en) | Wind turbine blade spar web having enhanced buckling strength | |
| CN104903570B (en) | There is the wind turbine of external adhesion flange near flat back plate | |
| CN111225788A (en) | Wind turbine blade comprising a root end structure with pultruded elements with transition portions | |
| CN109676958B (en) | Co-curing molded carbon fiber composite material airfoil and preparation method thereof | |
| EP3894190A1 (en) | Improvements relating to wind turbine blade manufacture | |
| CN104847595B (en) | A kind of Z pin enhancing composite material wind-power blade structures and its manufacture method | |
| EP3894189B1 (en) | Wind turbine blade shear web, method of manufacture and wind turbine blade | |
| CN108883588A (en) | Embedded components for wind turbine blade |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |
Country of ref document: DK |