DE2520623B2 - Fiber-reinforced plastic tube - Google Patents
Fiber-reinforced plastic tubeInfo
- Publication number
- DE2520623B2 DE2520623B2 DE19752520623 DE2520623A DE2520623B2 DE 2520623 B2 DE2520623 B2 DE 2520623B2 DE 19752520623 DE19752520623 DE 19752520623 DE 2520623 A DE2520623 A DE 2520623A DE 2520623 B2 DE2520623 B2 DE 2520623B2
- Authority
- DE
- Germany
- Prior art keywords
- layers
- impregnated
- plastic
- fiber
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
- B29C53/805—Applying axial reinforcements
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/562—Winding and joining, e.g. winding spirally spirally
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
- B29C70/083—Combinations of continuous fibres or fibrous profiled structures oriented in one direction and reinforcements forming a two dimensional structure, e.g. mats
- B29C70/085—Combinations of continuous fibres or fibrous profiled structures oriented in one direction and reinforcements forming a two dimensional structure, e.g. mats the structure being deformed in a three dimensional configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Description
Die Erfindung bezieht sich auf ein Rohr aus faserverstärktem Kunststoff der im Oberbegriff des Anspruchs 1 genannten Art.The invention relates to a pipe made of fiber-reinforced plastic in the preamble of Claim 1 referred to in Art.
Für bestimmte Anwendungen, z. B. in der Luft- und Raumfahrt, sind extrem leichte Rohre erwünscht, die trotzdem großen Beanspruchungen, insbesondere auf Knicken, gewachsen sein müssen. Für diese Zwecke scheiden Stahlrohre wegen ihres hohen Gewichtes aus und Metallrohre aus leichteren Werkstoffen sind entweder, wie z. B. Aluminium, nicht biegesteif genug, oder, wie z. B. Titan, zu teuer. Ein Rohr der eingangs genannten Art ist bereits durch die US-PS 29 69 812 bekannt geworden. Bei diesem Rohr werden als innere Lagen abwechselnd Bänder aus Plastik und mit Kunstharz imprägnierten Glasfaserrovinjjs auf einen Wickeldorn schraubenförmig aufgewickelt. Auf diese inneren Lagen werden axial verlaufende, nicht imprägnierte Glasfaserrovings aufgebracht, deren Lage durch einen Führungsring so lange gehalten wird, bis als Abschluß äußere Lagen von schraubenförmig aufgewikkelten Plastikbändern aufgebracht sind. Die Lagen werden danach in bekannter Weise durch Erwärmen miteinander verbunden und ausgehärtet, wonach das fertige Rohr vom Wickeldorn gezogen wird. Ein derartiges Rohr erzielt durch die Zwischenlage aus axialen Glasfaserrovings bereits eine höhere Festigkeit auf Knicken als bekannte Rohre, die nur aus radialen Wicklungen bestehen. Durch die Auswahl der verwendeten Werkstoffe und durch den Umstand, daß die Knickfestigkeit von Glasfasern nicht sehr hoch ist, ist auch dieses bekannte Rohr für höchste Beanspruchungen nicht einzusetzen.For certain applications, e.g. B. in the aerospace industry, extremely light tubes are desired that Nevertheless, they must be able to withstand great stresses, especially on kinks. For these purposes Because of their high weight, steel pipes are ruled out and metal pipes are made of lighter materials either, such as B. aluminum, not rigid enough, or, such. B. titanium, too expensive. A tube of the entrance mentioned type is already known from US-PS 29 69 812. This tube is called an inner Laying alternating strips of plastic and synthetic resin-impregnated fiberglass rovinjjs on one Winding mandrel wound up in a helical manner. Axial, non-impregnated layers are placed on these inner layers Glass fiber rovings applied, the position of which is held by a guide ring until as Completion of outer layers of helically wound plastic tapes are applied. The locations are then connected to one another in a known manner by heating and cured, after which the finished tube is pulled from the winding mandrel. Such a tube is achieved through the intermediate layer axial glass fiber rovings already have a higher strength on kinks than known tubes that are only made of radial Windings exist. By the selection of the materials used and by the fact that the The kink resistance of glass fibers is not very high, this well-known pipe is also for the highest stresses not to be used.
Der Erfindung liegt daher die Aufgabe zugrunde, Rohre aus faserverstärkt Kunststoffen zu schaffen, die noch größeren Beanspruchungen gewachsen sind und dabei äußerst geringes Gewicht aufweisen.The invention is therefore based on the object of creating pipes made of fiber-reinforced plastics, which can cope with even greater demands and are extremely light in weight.
Diese Aufgabe wird durch ein Rohr mit den Merkmalen nach dem kennzeichnenden Teil von Anspruch I gelöst. Vorteilhafte Weiterbildungen der Erfindung enthalten die Ansprüche 2 und 3.This task is accomplished by a pipe with the characteristics according to the characterizing part of Claim I solved. Claims 2 and 3 contain advantageous developments of the invention.
Die Erfindung vereinigt in günstiger Weise die Vorteile von Glas- und Kohlenstoffasern. Durch das gemeinsame Aufwickeln von axialen vorimprägniertenThe invention combines the advantages of glass and carbon fibers in a favorable manner. By the common winding of axial pre-impregnated
Kohlenstoffasern und nicht imprägniertem Glasgewebe erfolgt eine gute Verbindung dieser beiden Lagen und es wird eine hohe Festigkeit sowohl auf Knicken als auch auf Biegung erzielt Die äußeren radialen Wickellagen aus Kunststoff oder Glasfasern ergeben die notwendige Stützung der inneren Lagen und gleichzeitig eine Erhöhung der SchubfestigkeitCarbon fibers and non-impregnated glass fabric make a good connection between these two layers and a high strength is achieved both on kinking and bending. The outer radial Winding layers made of plastic or glass fibers provide the necessary support for the inner layers and at the same time an increase in the shear strength
Ausführungsbeispiele der Erfindung werden nachfolgend an Hand der Zeichnung näher erläutert Es zeigtEmbodiments of the invention are explained in more detail below with reference to the drawing. It shows
F i g. 1 den Aufbau der einzelnen Lagen einer Rohrwandung undF i g. 1 the structure of the individual layers of a pipe wall and
Fig.2 eine schematische Darstellung des Aufbringens einer oder mehrerer Lagen quer zur Längsrichtung des Rohres.2 shows a schematic representation of the application of one or more layers transversely to the longitudinal direction of the pipe.
Eine beispielhafte A -isführungsform eines Rohres 1 hat innen eine Lage aus flächenhaftem Textilglas, insbesondere mit Kunstharz imprägniertem Glasgewebe (Glasprepreg) 2 gröberer Art, darüber eine Lage aus mit Kunstharz vorimprägnierten unidirektionalen Kohlenstoffasern (Kohlenstoff-Pregpreg) 3, die durch eine Lage eines feineren nicht imprägniertem Glasgewebe 4 abgedeckt ist Diese Lagen werden, wie in F i g. 2 schematisch dargestellt ist, quer zur Längsrichtung auf einen Wickeldorn 5 aufgebracht Dabei wird so vorgegangen, daß von den Lagen aus Glasgewebe 2 und 4 entsprechend dem Rohrdurchmesser und der Anzahl der aufzubringenden Wicklungen passende rechteckige Stücke ausgeschnitten werden. Zuerst wird die Lage aus dem Glasgewebe 2, aus Glasprepreg, zweckmäßig in ein bis zwei Umwicklungen um den Wickeldorn 5 gelegt. Danach werden die Kohlenstoff-Prepregs 3 in entsprechender Breite auf die Lage aus nicht imprägniertem Glasgewebe 4 aufgelegt und angepreßt, worauf beideAn exemplary A -isführungform a pipe 1 has inside a layer of flat textile glass, in particular with synthetic resin impregnated glass fabric (glass prepreg) 2 of a coarser type, above a layer of unidirectional carbon fibers (carbon pregpreg) 3 pre-impregnated with synthetic resin, which is supported by a layer of a finer non-impregnated glass fabric 4 is covered. These layers are, as in FIG. 2 is shown schematically, applied transversely to the longitudinal direction on a winding mandrel 5 The procedure is that matching rectangular pieces are cut from the layers of glass fabric 2 and 4 according to the pipe diameter and the number of windings to be applied. First, the layer made of the glass fabric 2, made of glass prepreg, is expediently placed around the winding mandrel 5 in one or two wraps. Thereafter, the carbon prepregs 3 are placed in the appropriate width on the layer of non-impregnated glass fabric 4 and pressed, whereupon both
r> Lagen zusammen um den mit der Lage aus Glasgewebe 2 versehenen Dorn 5 ebenfalls quer zur Längsrichtung gewickelt werden. Bei nicht so hoch beanspruchten Rohren oder bei einer ausreichend hohen Anzahl von Wicklungen aus den Kohlenstoff-Prepregs 3 und dem nicht imprägnierten Glasgewebe 4 kann die innere Lage aus Glasgewebe 2 auch ganz entfallen.r> layers together around the with the layer of glass fabric 2 provided mandrel 5 are also wound transversely to the longitudinal direction. When not used so heavily Tubes or with a sufficiently high number of windings from the carbon prepregs 3 and the In the case of non-impregnated glass fabric 4, the inner layer of glass fabric 2 can also be dispensed with entirely.
Auf die verwendeten Lagen werden zum Schluß auf den in eine nicht dargestellte Wickelmaschine eingespannten Dorn 5 ein oder mehrere Lagen 6 einer Radialwicklung aus mit Kunstharz vorimprägnierten Glasfasersträngen (Rovings) aufgewickelt. Diese letzte radiale Wicklungslage 6 festigt die quer zur Längsrichtung aufgebrachten inneren Lagen und erhöht damit insgesamt die Festigkeit und Haltbarkeit des Rohres 1.The layers used are finally clamped into a winding machine, not shown Mandrel 5 one or more layers 6 of a radial winding made of pre-impregnated with synthetic resin Glass fiber strands (rovings) wound up. This last radial winding layer 6 strengthens the transverse to the longitudinal direction applied inner layers and thus increases the overall strength and durability of the tube 1.
Das fertig gewickelte Rohr 1 muß darauf noch auf dem Wickeldorn 5 aushärten, wozu es auf etwa 1500C erhitzt und dann abgekühlt wird. Noch vor dem völligen Abkühlen bei etwa 800C wird das fertige Rohr 1 von dem Wickeldorn 5 abgedrückt, was bei dieser Temperatur ohne Schwierigkeiten erfolgen kann.The finished wound tube 1 must harden it, still on the mandrel 5, to which it is heated to about 150 0 C and then cooled. Even before the complete cooling at about 80 0 C the finished tube 1 is pressed off from the mandrel 5, which may be accomplished at this temperature without difficulty.
Die erfindungsgemäßen Rohre haben bei einem Volumen-Verhältnis von Kunstharz zu Glas- bzw. Kohlenstoffasern von etwa 50 zu 50 die Festigkeitswerte von besten Stahlrohren. Dadurch, daß die Dichte der Rohre aus faserverstärkten Kunststoffen weniger als ein Viertel derjenigen des Stahls beträgt (Mittel etwa 1,85), ergibt sich somit eine auf das Gewicht bezogene über 4fache Festigkeit gegenüber Stahlrohren. Diese Festigkeitswerte lassen sich noch steigern, wenn man den Glas- bzw. Kohlenstoffanteil vergrößert, was bis etwa 70% durchaus möglich ist.The pipes according to the invention have a volume ratio of synthetic resin to glass or Carbon fibers from about 50 to 50 the strength values of the best steel pipes. Because the density of the Pipes made of fiber-reinforced plastics is less than a quarter of that of steel (average about 1.85), This results in a weight-related strength of over 4 times that of steel pipes. These strength values can be increased if the glass or carbon content is increased, which is up to about 70% is quite possible.
Claims (3)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752520623 DE2520623B2 (en) | 1975-05-09 | 1975-05-09 | Fiber-reinforced plastic tube |
AT302076A AT350341B (en) | 1975-05-09 | 1976-04-26 | FIBER-REINFORCED PLASTIC TUBE |
FR7613853A FR2310517A1 (en) | 1975-05-09 | 1976-05-07 | FIBER REINFORCED SYNTHETIC TUBE |
GB1870376A GB1556388A (en) | 1975-05-09 | 1976-05-07 | Pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752520623 DE2520623B2 (en) | 1975-05-09 | 1975-05-09 | Fiber-reinforced plastic tube |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2520623A1 DE2520623A1 (en) | 1976-11-11 |
DE2520623B2 true DE2520623B2 (en) | 1980-07-31 |
Family
ID=5946128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19752520623 Ceased DE2520623B2 (en) | 1975-05-09 | 1975-05-09 | Fiber-reinforced plastic tube |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT350341B (en) |
DE (1) | DE2520623B2 (en) |
FR (1) | FR2310517A1 (en) |
GB (1) | GB1556388A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3907785A1 (en) * | 1989-03-10 | 1990-09-13 | Gerhard Rosenberg | Plastic pipe and process for its production |
DE102005061838A1 (en) * | 2005-12-23 | 2007-07-05 | Xperion Isola Composites Gmbh | Air conditioning pipe for e.g. military aircraft, has wall with fiber composite in radial direction, where composite has radially moving fiber layers made of fiber glass reinforcement, and other two layers made of synthetic fiber structure |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4171626A (en) * | 1978-03-27 | 1979-10-23 | Celanese Corporation | Carbon fiber reinforced composite drive shaft |
DE2853417A1 (en) * | 1978-12-11 | 1980-06-19 | Carbone Ag | METHOD AND DEVICE FOR PRODUCING A MOLDED OR HOLLOW BODY FROM COMPOSITE MATERIAL, AND MOLDED OR HOLLOW BODY FROM COMPOSITE MATERIAL |
FR2462266A1 (en) * | 1979-07-26 | 1981-02-13 | Tech Verre Tisse | Laminated racquet shaft reinforced with parallel and crossed filaments - laid up in separate layers to maintain alignment |
FR2463671A1 (en) * | 1979-08-17 | 1981-02-27 | Duflos Jacques | Automated lay=up of hollow reinforced resin profiles - for wind-surfing masts etc. requiring multiaxial stiffness |
DE3106273A1 (en) | 1981-02-20 | 1982-09-09 | Ten Cate Sports B.V., 7602 Almelo | "TUBE BODY MADE OF HYBRID FIBER REINFORCED PLASTIC" |
AT380089B (en) * | 1984-04-11 | 1986-04-10 | Hobas Durotec Rohre Ges M B H | TUBE MADE OF FIBER REINFORCED, CURABLE PLASTIC, METHOD FOR PRODUCING THE SAME AND DEVICE FOR IMPLEMENTING THE METHOD |
US4705660A (en) * | 1985-04-11 | 1987-11-10 | Robert Demarle | Method and apparatus for producing a pipe of fiber-reinforced, hardenable synthetic resin |
US5261991A (en) * | 1986-04-30 | 1993-11-16 | Dana Corporation | Composite tubular elements and methods of fabrication |
IT1205783B (en) * | 1986-04-30 | 1989-03-31 | Dana Corp | COMPOSITE TUBULAR ELEMENTS FOR MOTOR SHAFT OF VEHICLES AND METHODS FOR MANUFACTURE |
AT405040B (en) * | 1995-05-18 | 1999-04-26 | Zimmer Maschinenbau Gmbh | DEVICE FOR DISTRIBUTING FLOWABLE MEDIA |
GB2367874A (en) * | 2000-10-10 | 2002-04-17 | Milliken Europ Nv | Pipe with longitudinal reinforcements and manufacturing method |
EP3726545A1 (en) * | 2019-04-16 | 2020-10-21 | Siemens Aktiengesellschaft | Bath cryostat for a superconducting device having reduced convection |
CN111271527A (en) * | 2020-03-04 | 2020-06-12 | 广东宇顺新材料科技有限公司 | Carbon fiber-PMI composite pipeline and preparation method thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3335757A (en) * | 1964-07-10 | 1967-08-15 | Clevite Corp | Reinforced composite wall tube |
US3502113A (en) * | 1966-12-14 | 1970-03-24 | Johan Bjorksten | Tubular article and method of manufacture |
US3481369A (en) * | 1967-06-16 | 1969-12-02 | Ganahl Carl De | Reinforced plastic pipe |
GB1250830A (en) * | 1969-06-25 | 1971-10-20 |
-
1975
- 1975-05-09 DE DE19752520623 patent/DE2520623B2/en not_active Ceased
-
1976
- 1976-04-26 AT AT302076A patent/AT350341B/en not_active IP Right Cessation
- 1976-05-07 FR FR7613853A patent/FR2310517A1/en active Granted
- 1976-05-07 GB GB1870376A patent/GB1556388A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3907785A1 (en) * | 1989-03-10 | 1990-09-13 | Gerhard Rosenberg | Plastic pipe and process for its production |
DE102005061838A1 (en) * | 2005-12-23 | 2007-07-05 | Xperion Isola Composites Gmbh | Air conditioning pipe for e.g. military aircraft, has wall with fiber composite in radial direction, where composite has radially moving fiber layers made of fiber glass reinforcement, and other two layers made of synthetic fiber structure |
Also Published As
Publication number | Publication date |
---|---|
ATA302076A (en) | 1978-10-15 |
FR2310517A1 (en) | 1976-12-03 |
DE2520623A1 (en) | 1976-11-11 |
AT350341B (en) | 1979-05-25 |
GB1556388A (en) | 1979-11-21 |
FR2310517B1 (en) | 1980-07-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8235 | Patent refused |