CH621857A5 - Screw of a composite material containing carbon fibres - Google Patents
Screw of a composite material containing carbon fibres Download PDFInfo
- Publication number
- CH621857A5 CH621857A5 CH136278A CH136278A CH621857A5 CH 621857 A5 CH621857 A5 CH 621857A5 CH 136278 A CH136278 A CH 136278A CH 136278 A CH136278 A CH 136278A CH 621857 A5 CH621857 A5 CH 621857A5
- Authority
- CH
- Switzerland
- Prior art keywords
- screw
- screws
- carbon fibers
- composite material
- thread
- Prior art date
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 12
- 229910052799 carbon Inorganic materials 0.000 title claims description 11
- 239000002131 composite material Substances 0.000 title claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 18
- 239000004917 carbon fiber Substances 0.000 claims description 18
- 239000011159 matrix material Substances 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims 1
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000011295 pitch Substances 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012783 reinforcing fiber Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000011294 coal tar pitch Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000011339 hard pitch Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000011271 tar pitch Substances 0.000 description 1
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
- 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
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
- B29C70/205—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration
- B29C70/207—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration arranged in parallel planes of fibres crossing at substantial angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D1/00—Producing articles with screw-threads
- B29D1/005—Producing articles with screw-threads fibre reinforced
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/006—Non-metallic fasteners using screw-thread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2095/00—Use of bituminous materials as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2707/00—Use of elements other than metals for preformed parts, e.g. for inserts
- B29K2707/04—Carbon
-
- 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
- B29L2001/00—Articles provided with screw threads
- B29L2001/002—Bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Ceramic Products (AREA)
- Moulding By Coating Moulds (AREA)
Description
Der Erfindung liegt die Aufgabe zugrunde, unter Aufrechterhaltung der hohen Zug- und Biegefestigkeit die Scherfestigkeit von Schrauben aus einem kohlenstoffaserverstärkten Verbundwerkstoff zu verbessern. Diese Schraube enthält in einer Matrix verteilt Kohlenstoffasern 2, die im Schraubenkern 1 in Richtung der Schraubenlängsachse angeordnet sind und im Gewinde 3 unter einem spitzen Winkel zur Längsachse verlaufen. The invention has for its object to improve the shear strength of screws made of a carbon fiber reinforced composite material while maintaining the high tensile and bending strength. This screw contains carbon fibers 2 distributed in a matrix, which are arranged in the screw core 1 in the direction of the screw longitudinal axis and run in the thread 3 at an acute angle to the longitudinal axis.
Nach einer bevorzugten Weiterbildung der Erfindung ist der Winkel gleich dem Steigungswinkel des Gewindes. Die Matrix des Verbundwerkstoffes besteht nach der Erfindung vorzugsweise aus Kohlenstoff. Andere geeignete Matrixwerkstoffe sind beispielsweise härtbare Kunstharze, wie Epoxidharze und Phenolformaldehydharze. Unter dem Begriff Kohlenstoffasern werden nach der Erfindung ebenfalls Graphitfasern verstanden, die aus Kohlenstoffasern durch einen thermischen Prozess hergestellt werden. Erfindungsgemässe Schrauben sind schliesslich nicht auf besondere Gewindeformen und -Steigungen beschränkt. According to a preferred development of the invention, the angle is equal to the pitch angle of the thread. According to the invention, the matrix of the composite material preferably consists of carbon. Other suitable matrix materials are, for example, curable synthetic resins, such as epoxy resins and phenol formaldehyde resins. According to the invention, the term carbon fibers is also understood to mean graphite fibers which are produced from carbon fibers by a thermal process. Finally, screws according to the invention are not restricted to special thread shapes and pitches.
In Schrauben gemäss der Erfindung sind die Vorteile eines Verbundwerkstoffes mit unidirektional angeordneten Verstärkungsfasern und eines mehrere gegeneinander versetzte Faserlagen enthaltenden Werkstoffs vereinigt, wobei der Schraubenkern bevorzugt Zug- und Biegespannungen und die Gewindegänge Scherspannungen aufnehmen, wodurch bei ungeschmälerter Zug- und Biegefestigkeit des Schraubenkerns eine wesentlich höhere Scherfestigkeit der Gewindegänge erreicht wird. Screws according to the invention combine the advantages of a composite material with unidirectionally arranged reinforcement fibers and a material containing a plurality of mutually offset fiber layers, the screw core preferably absorbing tensile and bending stresses and the thread shear stresses, which means a much higher tensile and bending strength of the screw core Shear strength of the threads is achieved.
Als Verstärkungsfasern für erfindungsgemässe Schrauben sind besonders Kohlenstoff- oder Graphitfasern mit einer Reissfestigkeit > 2 kN/mm2 geeignet, die gegebenenfalls nach einer die interlaminare Scherfestigkeit verbesserten Oberflächenbehandlung mit einem härtbaren Kunstharz, wie z.B. Epoxid-, Furan- oder Phenolharz imprägniert und beschichtet, in Schichten ausgelegt und anschliessend nach Trocknung und pertieller Härtung des Harzes zu Platten oder zylindrischen Stäben verpresst werden. Nach vollständiger Härtung der Harzmatrix, die zweckmässigerweise im Temperaturbereich zwischen etwa 150 und 200° C vorgenommen wird, werden aus den etwa 40 bis 70 Vol.-% unidirektional geordnete Kohlenstoffasern enthaltenden Rohkörpern Zylinder herausgearbeitet, deren Durchmesser gleich dem Kerndurchmesser der jeweiligen Schraube ist; in dem gleichen Arbeitsgang kann in bekannter Weise der Schraubenkopf hergestellt werden. Nun wird auf den Kern im Wickelverfahren aus kunstharzimprägnierten Garnen oder Rovings eine aus mehreren Lagen bestehende Schicht bis zum gewünschten Aussendurchmesser der Schrauben aufgezogen. Die Kohlenstoffasern verlaufen in dieser Schicht in einem spitzen Winkel zur Längsachse des Schraubenkerns, bevorzugt entspricht der Winkel dem Steigungswinkel der Schraube. Nach Härtung des Harzes wird dann in bekannter Weise das Gewinde geschnitten. Particularly suitable reinforcing fibers for screws according to the invention are carbon or graphite fibers with a tensile strength of> 2 kN / mm2, which, if necessary, after a surface treatment with a hardenable synthetic resin, such as e.g. Epoxy, furan or phenolic resin impregnated and coated, laid out in layers and then pressed into sheets or cylindrical rods after drying and pertial hardening of the resin. After the resin matrix has completely hardened, which is expediently carried out in the temperature range between about 150 and 200 ° C., cylinders are worked out from the roughly 40 to 70% by volume unidirectionally arranged carbon fibers, the diameter of which is equal to the core diameter of the respective screw; in the same operation, the screw head can be produced in a known manner. Now a layer consisting of several layers is applied to the core in the winding process from synthetic resin impregnated yarns or rovings up to the desired outside diameter of the screws. The carbon fibers run in this layer at an acute angle to the longitudinal axis of the screw core, the angle preferably corresponds to the pitch angle of the screw. After the resin has hardened, the thread is then cut in a known manner.
Zur Herstellung von Schrauben mit einer Kohlenstoffmatrix werden Schrauben, die eine Harzmatrix enthalten, zur Carboni-sierung des Harzes in einer inerten Atmosphäre auf etwa 1000° C erhitzt. Da die Harzmatrix unter diesen Bedingungen schrumpft, ist im allgemeinen zur Korrektur der Massänderungen eine Nacharbeitung erforderlich. Nach einem anderen Verfahren werden daher als Matrixmaterial für Schrauben aus kohlenstoffaserverstärktem Kohlenstoff Steinkohlenteerpech-kokse verwendet. Die Kohlenstoffasern werden dabei mit einem Teerpech imprägniert, in Schichten ausgelegt und zu Platten oder zylindrischen Stäben verpresst. Auf die Rohlinge werden nun nach entsprechender Bearbeitung aus pechimprägnierten Rovings oder Garnen mehrere Lagen aufgewickelt oder die Rohlinge werden zunächst carbonisiert und daran anschliessend bearbeitet und mit Wickelschichten versehen. Im zweiten Fall ist eine zweite Erhitzung auf die Carbonisierungstemperatur erforderlich. Das Gewinde wird jeweils nach der letzten Carbo-nisierung geschnitten. To produce screws with a carbon matrix, screws containing a resin matrix are heated to about 1000 ° C. in an inert atmosphere to carbonize the resin. Since the resin matrix shrinks under these conditions, reworking is generally necessary to correct the dimensional changes. According to another method, coal tar pitch coke is therefore used as the matrix material for screws made of carbon fiber-reinforced carbon. The carbon fibers are impregnated with tar pitch, laid out in layers and pressed into plates or cylindrical rods. After appropriate processing of pitch-impregnated rovings or yarns, several layers are then wound onto the blanks or the blanks are first carbonized and then processed and provided with winding layers. In the second case, a second heating to the carbonization temperature is required. The thread is cut after the last carbonation.
Im folgenden werden anhand von Beispielen und einer Zeichnung Herstellung und Eigenschaften erfindungsgemässer Schrauben beschrieben. The production and properties of screws according to the invention are described below with the aid of examples and a drawing.
Beispiel 1 example 1
Kohlenstoffaserrovings mit 10 000 Filamenten wurden zu Bändern ausgelegt, mit dem handelsüblichen Harzsystem Epi-kote ® DX 210 / Epikure ® DX137 imprägniert, 30 min bei einer Temperatur von 80° C getrocknet und in einer Pressform unter einem Druck von 0,7 N/mm2 auf 140° C erhitzt. Aus dem Rohkörper, dessen Faseranteil ca. 60 Vol.-% betrug, wurden Stäbe mit dem Querschnitt 10 X 10 mm in Richtung des Faserverlaufs geschnitten und die Stäbe auf einen Durchmesser von 9 mm abgedreht. Hochfeste Kohlenstoffasern mit 3000 Filamenten, die mit dem handelsüblichen Harzsystem Araldit ® LY 556/HY 951 imprägniert waren, wurden dann unter einer um ca. 85° gegen die Zylinderachse geneigten Richtung aufgewickelt und in die Wickellagen nach einer Härtungszeit von 15 h ein Gewinde mit einem Steigungswinkel von 5° geschnitten. Die Biegefestigkeit des Schraubenkerns betrug 1300 bis 1500 N/mm2, die Biegefestigkeit des Gewindes 450 bis 500 N/ mm2 Carbon fiber rovings with 10,000 filaments were laid out into strips, impregnated with the commercial resin system Epi-kote ® DX 210 / Epikure ® DX137, dried for 30 minutes at a temperature of 80 ° C and in a press mold under a pressure of 0.7 N / mm2 heated to 140 ° C. Rods with a cross section of 10 × 10 mm were cut from the raw body, the fiber content of which was approximately 60% by volume, and the rods were twisted to a diameter of 9 mm. High-strength carbon fibers with 3000 filaments, which were impregnated with the commercially available Araldit ® LY 556 / HY 951 resin system, were then wound under a direction inclined by approx Cut angle of 5 °. The bending strength of the screw core was 1300 to 1500 N / mm2, the bending strength of the thread 450 to 500 N / mm2
Beispiel 2 Example 2
Unidirektional ausgelegte Kohlenstoffaser-Gewebebänder wurden in einer Pressform mit feingemahlenem, bei einer Tem5 Unidirectionally designed carbon fiber fabric tapes were in a press mold with finely ground, at a Tem5
10 10th
15 15
20 20th
25 25th
30 30th
35 35
40 40
45 45
50 50
55 55
60 60
65 65
3 3rd
621 857 621 857
peratur oberhalb 180° C erweichenden Hartpech beschichtet und die Anordnung in einem Ofen auf etwa 300° C erhitzt und anschliessend unter einem Druck von 0,7 N/mm2 verdichtet. Die Rohkörper wurden dann unter einem Druck von 25 bar auf 550° C erhitzt, abgekühlt und zweimal mit einem Steinkohlen-teerpech mit einem Erweichungspunkt von ca. 60° C imprägniert. Nach jedem Imprägnierungsschritt wurden die Körper unter Druck auf 550° C und nach der zweiten Imprägnierung zur vollständigen Carbonisierung der Kohlenstoffmatrix drucklos auf ca. 1000° C erhitzt. Wie in Beispiel 1 beschrieben, wurden aus dem Rohkörper zylindrische Stäbe hergestellt, deren Verstärkungsfasern parallel zur Längsachse der Zylinder angeordnet waren. Hochfeste Kohlenstoffasern mit 3000 Filamenten wurden dann unter einem Winkel von 85° trocken auf die zylindrischen Kerne aufgewickelt und die Schichten wie oben beschrieben mit Pech imprägniert, carbonisiert und das Gewinde geschnitten. Bei einem Faseranteil von ca. 60 Vol.-% wiesen die Schrauben folgende Eigenschaften auf: hard-pitch softening temperature above 180 ° C and the assembly heated in an oven to about 300 ° C and then compressed under a pressure of 0.7 N / mm2. The raw bodies were then heated to 550 ° C. under a pressure of 25 bar, cooled and impregnated twice with a coal tar pitch with a softening point of approx. 60 ° C. After each impregnation step, the bodies were heated under pressure to 550 ° C and after the second impregnation to complete carbonization of the carbon matrix to about 1000 ° C without pressure. As described in Example 1, cylindrical rods were produced from the raw body, the reinforcing fibers of which were arranged parallel to the longitudinal axis of the cylinders. High-strength carbon fibers with 3000 filaments were then dry-wound onto the cylindrical cores at an angle of 85 ° and the layers were impregnated with pitch, carbonized and the thread cut as described above. With a fiber content of approx. 60 vol.%, The screws had the following properties:
Kern core
400 bis 500 110 000 400 to 500 110,000
Gewinde 450 N/mm2 110 000 N/mm2 Thread 450 N / mm2 110 000 N / mm2
Biegefestigkeit Elastizitätsmodul Flexural strength modulus of elasticity
5 In der Zeichnung verlaufen im Schraubenkern 1 die Kohlenstoffasern 2 parallel zur Schraubenlängsachse. Im Gewinde 3 folgen die Verstärkungsfasern der Gewindesteigung. Verglichen mit bekannten Schrauben aus einem Verbundwerksotff ist der Schraubenkern und damit die Festigkeit der Schraube unverän-io dert, die Abscherfestigkeit der Gewindegänge ist, wie das Vergleichsbeispiel zeigt, jedoch wesentlich grösser. 5 In the drawing, the carbon fibers 2 in the screw core 1 run parallel to the longitudinal axis of the screw. In thread 3, the reinforcing fibers follow the thread pitch. Compared to known screws from a composite material, the screw core and thus the strength of the screw is unchanged, but the shear strength of the threads, as the comparative example shows, is considerably greater.
Für die Abscherung eines Gewindegangs im Durchschnitt aufzuwendende Kraft: Average force to shear a thread:
Matrix matrix
Kunstharz Kohlenstoff unidirektionale Faserorientierung Synthetic resin carbon unidirectional fiber orientation
2 800 N 500 N 2,800 N 500 N
gewickelte Gewindegänge wound threads
4 400 N 850 N 4,400 N 850 N
C C.
1 Blatt Zeichnungen 1 sheet of drawings
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772705336 DE2705336A1 (en) | 1977-02-09 | 1977-02-09 | CARBON FIBER REINFORCED SCREW |
Publications (1)
Publication Number | Publication Date |
---|---|
CH621857A5 true CH621857A5 (en) | 1981-02-27 |
Family
ID=6000702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH136278A CH621857A5 (en) | 1977-02-09 | 1978-02-07 | Screw of a composite material containing carbon fibres |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT356971B (en) |
CH (1) | CH621857A5 (en) |
DE (1) | DE2705336A1 (en) |
FR (1) | FR2380459A1 (en) |
GB (1) | GB1557762A (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2920357C2 (en) * | 1979-05-19 | 1986-10-30 | Sigri GmbH, 8901 Meitingen | Carbon screw |
FR2541621B1 (en) * | 1983-02-28 | 1988-01-08 | Asahi Chemical Ind | PLASTIC ELEMENT REINFORCED BY FIBERS AND EXTERNALLY THREADED AND METHOD FOR MANUFACTURING THE SAME |
FR2568819B1 (en) * | 1984-08-08 | 1986-11-21 | Garbolino Sa Ets | TUBULAR ELEMENTS OF RESISTANT FIBERS COATED WITH CURABLE RESIN |
DE3504829A1 (en) * | 1985-02-13 | 1986-08-14 | Röchling Haren KG, 4472 Haren | THREADED ELEMENT |
US4824314A (en) * | 1985-02-19 | 1989-04-25 | Northrop Corporation | Composite fastener system and manufacturing method thereof |
US4718801A (en) * | 1986-07-24 | 1988-01-12 | Microdot Inc. | Composite core fastener |
US4863330A (en) * | 1987-07-15 | 1989-09-05 | Northrop Corporation | Composite fastener and method of manufacture |
DE3818596C1 (en) * | 1988-06-01 | 1990-01-11 | Roechling Haren Kg, 4472 Haren, De | Tension rod |
US5127783A (en) * | 1989-05-25 | 1992-07-07 | The B.F. Goodrich Company | Carbon/carbon composite fasteners |
JP2792716B2 (en) * | 1990-06-04 | 1998-09-03 | 北川工業株式会社 | Fastener |
DE4337043C2 (en) * | 1993-10-29 | 1997-04-30 | Man Technologie Gmbh | Fastening element for ceramic components |
KR20100130286A (en) | 2009-06-03 | 2010-12-13 | 에스케이케미칼주식회사 | Fiber reinforced plastic bolt and method for producing the same |
US8613580B2 (en) | 2011-04-28 | 2013-12-24 | Lockheed Martin Corporation | Fastening device |
DE102014103270A1 (en) | 2014-03-12 | 2015-09-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Fastening element and method for producing a fastener |
JP7236725B2 (en) * | 2018-01-11 | 2023-03-10 | 株式会社タカイコーポレーション | Fiber-reinforced resin bolt manufacturing method and fiber-reinforced resin bolt |
DE202018100151U1 (en) * | 2018-01-12 | 2018-02-21 | Ctg Carbon Team Germany Gmbh | Carbon fiber screw |
CN113956061B (en) * | 2021-11-12 | 2023-08-22 | 中国航空制造技术研究院 | Preparation method of continuous fiber reinforced ceramic matrix composite screw |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE812487C (en) * | 1948-10-12 | 1951-08-30 | Willy Gill | Screws and nuts made from molded material |
FR1143372A (en) * | 1955-03-14 | 1957-09-30 | Licentia Gmbh | Synthetic screws |
US2943967A (en) * | 1956-06-29 | 1960-07-05 | Minnesota Mining & Mfg | Reinforced plastic screw threads |
DE1084088B (en) * | 1958-12-06 | 1960-06-23 | Hans Weber Dr Ing | Cast resin screw and nut with fiber insert |
FR1301153A (en) * | 1961-09-15 | 1962-08-10 | Asea Ab | Process for the manufacture of a threaded bolt of plastic material reinforced with fiberglass |
FR1312753A (en) * | 1962-01-22 | 1962-12-21 | Rock Island Oil & Refining Com | Seal in particular for plastic pipes |
US3381716A (en) * | 1962-10-12 | 1968-05-07 | Rock Island Oil & Refining Co | Threaded pipe construction |
NL299115A (en) * | 1962-10-12 | |||
DE1892869U (en) * | 1964-01-08 | 1964-05-14 | Licentia Gmbh | GLASS FIBER REINFORCED PLASTIC BOLT. |
US3495494A (en) * | 1967-07-11 | 1970-02-17 | Cp Corp | Threaded plastic member with a reinforced thread |
US3712428A (en) * | 1970-06-22 | 1973-01-23 | Carborundum Co | Reinforced carbon bodies |
GB1485078A (en) * | 1974-09-14 | 1977-09-08 | Messerschmitt Boelkow Blohm | Connecting element for transmission of compressive or extensive loads |
GB1460876A (en) * | 1975-01-03 | 1977-01-06 | Coal Ind | Carbon artefacts |
-
1977
- 1977-02-09 DE DE19772705336 patent/DE2705336A1/en not_active Withdrawn
- 1977-11-30 FR FR7736174A patent/FR2380459A1/en active Pending
- 1977-12-05 AT AT868477A patent/AT356971B/en not_active IP Right Cessation
-
1978
- 1978-01-25 GB GB306678A patent/GB1557762A/en not_active Expired
- 1978-02-07 CH CH136278A patent/CH621857A5/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AT356971B (en) | 1980-06-10 |
DE2705336A1 (en) | 1978-08-10 |
GB1557762A (en) | 1979-12-12 |
FR2380459A1 (en) | 1978-09-08 |
ATA868477A (en) | 1979-10-15 |
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