WO2015082437A1 - Flexible shaft, and screw conveyor comprising a shaft of this type - Google Patents

Flexible shaft, and screw conveyor comprising a shaft of this type Download PDF

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Publication number
WO2015082437A1
WO2015082437A1 PCT/EP2014/076179 EP2014076179W WO2015082437A1 WO 2015082437 A1 WO2015082437 A1 WO 2015082437A1 EP 2014076179 W EP2014076179 W EP 2014076179W WO 2015082437 A1 WO2015082437 A1 WO 2015082437A1
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WO
WIPO (PCT)
Prior art keywords
shaft
fiber
reinforced plastic
fibers
plastic
Prior art date
Application number
PCT/EP2014/076179
Other languages
German (de)
French (fr)
Inventor
Rolf Kammerer
Original Assignee
Kammerer Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kammerer Gmbh filed Critical Kammerer Gmbh
Publication of WO2015082437A1 publication Critical patent/WO2015082437A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
    • B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
    • B65G33/16—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing with flexible screws operating in flexible tubes
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
    • F16C1/02—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers

Definitions

  • the invention relates to a screw conveyor with the features specified in the preamble of claim 1, as is known from DE 30 18 929 A1. From DE 30 18 929 A1 a plastic screw is known, whose shaft is reinforced with an embedded steel cable. In this way, a very tensile wave can be produced, which can be used for a flexible screw conveyor.
  • the object of the present invention is to improve this worm and still further and to provide a better flexible shaft.
  • a shaft according to the invention has a polymer core which is surrounded by a fiber-reinforced plastic. In this way, a flexible shaft is created, which is light, can transmit high torques and can be produced inexpensively.
  • An inventive screw conveyor has a hose and a screw arranged in the hose, which has such a shaft and a helix surrounding the shaft. The helix is materially connected to the shaft and may for example be made of an elastomer.
  • a shaft according to the invention combines the advantage of a low weight with the advantages of a high torsional and tensile strength and low manufacturing costs.
  • fiber-reinforced plastic By using fiber-reinforced plastic, lower weight and lower costs increase the rotational and tensile strength.
  • fiber-reinforced plastics are generally less resilient than steel cables, a shaft according to the invention has a comparatively high torsional strength. This is because the fiber reinforced plastic surrounds a plastic core of the shaft. The fiber-reinforced plastic is thus arranged at a distance from the center of the shaft and therefore can transmit much larger torques than a per se more resilient steel cable, which is arranged in conventional waves in the center of the shaft.
  • the helix, the matrix of the fiber reinforced plastic and the core of the shaft can be made of different plastics to optimize various characteristics of the screw.
  • thermosets are suitable for the matrix of the fiber-reinforced plastic.
  • epoxy resin is used for the matrix of the fiber-reinforced plastic.
  • the polymer core of the shaft can be made of rubber, for example.
  • the polymer core is made of plastic and can therefore also be referred to as a plastic core.
  • Suitable plastics are thermoplastics or elastomers, in particular silicone elastomers. Increasing the mechanical strength of plastics can already be achieved by disordered fibers.
  • the fibers are contained in the fiber-reinforced plastic ordered, for example, as a fabric, braid or scrim.
  • the fibers are embedded as a scrim in the matrix, it is particularly advantageous to use multilayer scrims, wherein the fibers of different layers are oriented differently, for example obliquely to each other.
  • the fibers of the fiber-reinforced plastic may be, for example, glass fibers, carbon fibers or plastic fibers.
  • Aramid fibers, polyester fibers, in particular aromatic polyester fibers, and polyethylene fibers are particularly suitable.
  • Suitable chamfers are commercially available, for example, under the names Vectran or Dyneema. Further details and advantages of the invention will be explained with reference to embodiments with reference to the accompanying drawings. Show it
  • FIG. 1 is a partially sectioned side view of a screw conveyor; and FIG. 2 shows a longitudinal section of a section of the screw of the screw conveyor.
  • the screw conveyor shown schematically in FIG. 1, not to scale, has a hose 1 and a worm 2 arranged in the hose 1, which consists of a shaft 21 and a helix 22 fastened to the shaft 21 with a material fit.
  • a portion of the screw 2 is shown in a longitudinal section.
  • the coil 22 is made by molding the shaft 21 and may be made of polyurethane, for example.
  • the shaft 21 has a shaft core 21 a, which may for example consist of a thermoplastic material.
  • the shaft core 21 a is coated with a fiber-reinforced plastic 21 b. Between the coil 22 and the fiber reinforced plastic 21 b further layers may be arranged.
  • the fiber reinforced plastic 21 b is encapsulated with the material forming the helix 22, so for example with polyurethane.
  • the jacket made of fiber-reinforced plastic 21 b is thus surrounded by a jacket made of the material of the coil 22.
  • the material of the coil 22 may be, for example, an elastomer or thermosetting plastic.
  • the fibers are contained in the fiber-reinforced plastic ordered, for example as a braid, fabric or scrim.
  • the fibers are preferably aramid fibers.
  • other plastic fibers, glass fibers or carbon fibers may be used.
  • the fibers are embedded in a plastic matrix which may be, for example, epoxy resin.
  • the shaft 21 can be made by extrusion and pultrusion and then partially overmoulded to form the helix 22.
  • the length of such a section which is in each case encapsulated in an encapsulation process, can for example be between two and four period lengths of the coil. By successively molding adjacent sections, a screw of virtually any length can be made.
  • Figures 1 and 2 are not to scale.
  • the core 21 of the shaft 2 may, for example, have a diameter which is at least half the outer diameter of the cladding made of fiber-reinforced plastic 21 b, preferably at least two-thirds of the outer diameter of the cladding made of fiber-reinforced plastic 21 b.
  • the plastic core 21 of the shaft 2 has a diameter which is at least three quarters of the outer diameter of the jacket made of fiber-reinforced plastic 21 b.
  • the diameter of the shaft core 21 is preferably not more than nine-tenths, for example, not more than four-fifths of the outer diameter of the fiber-reinforced plastic jacket 21 b. List of numbers Hose

Abstract

Described is a flexible shaft comprising a polymer core (21a) and a shell which is made of fiber-reinforced plastic (21b) and surrounds the polymer core (21a).

Description

Flexible Welle und Schneckenförderer mit einer solchen Welle  Flexible shaft and screw conveyor with such a shaft
Beschreibung description
Die Erfindung geht aus von einem Schneckenförderer mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen, wie er aus der DE 30 18 929 A1 bekannt ist. Aus der DE 30 18 929 A1 ist eine Schnecke aus Kunststoff bekannt, deren Welle mit einem eingebetteten Stahlseil verstärkt ist. Auf diese Weise lässt sich eine sehr zugfeste Welle herstellen, die für einen biegsamen Schneckförderer verwendet werden kann. Aufgabe der vorliegenden Erfindung ist es, diese Schnecke und noch weiter zu verbessern und eine bessere flexible Welle zu schaffen. The invention relates to a screw conveyor with the features specified in the preamble of claim 1, as is known from DE 30 18 929 A1. From DE 30 18 929 A1 a plastic screw is known, whose shaft is reinforced with an embedded steel cable. In this way, a very tensile wave can be produced, which can be used for a flexible screw conveyor. The object of the present invention is to improve this worm and still further and to provide a better flexible shaft.
Diese Aufgabe wird durch eine Welle mit den im Anspruch 1 angegebenen Merkmalen und durch einen Schneckenförderer mit einer solchen Welle gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand von Unteransprüchen. Eine erfindungsgemäße Welle hat einen Polymerkern, der von einem faserverstärkten Kunststoff umgeben ist. Auf diese Weise wird eine flexible Welle geschaffen, die leicht ist, hohe Drehmomente übertragen kann und sich kostengünstig herstellen lässt. Ein erfindungsgemäßer Schneckenförderer hat einen Schlauch und eine in dem Schlauch angeordnete Schnecke, die eine solche Welle und eine die Welle umgebende Wendel aufweist. Die Wendel ist stoffschlüssig mit der Welle verbunden und kann beispielsweise aus einem Elastomer sein. This object is achieved by a shaft having the features specified in claim 1 and by a screw conveyor with such a shaft. Advantageous developments of the invention are the subject of dependent claims. A shaft according to the invention has a polymer core which is surrounded by a fiber-reinforced plastic. In this way, a flexible shaft is created, which is light, can transmit high torques and can be produced inexpensively. An inventive screw conveyor has a hose and a screw arranged in the hose, which has such a shaft and a helix surrounding the shaft. The helix is materially connected to the shaft and may for example be made of an elastomer.
Eine erfindungsgemäße Welle verbindet den Vorteil eines geringen Gewichts mit den Vorteilen einer hohen Dreh- und Zugfestigkeit und geringen Fertigungskosten. Durch den Einsatz von faserverstärktem Kunststoff wird mit geringerem Gewicht und geringeren Kosten eine Erhöhung der Dreh- und Zugfestigkeit erreicht. Obwohl faserverstärkte Kunststoffe im Allgemeinen weniger belastbar sind als Stahlseile, hat eine erfindungsgemäße Welle eine vergleichbar hohe Drehfestigkeit. Dies liegt daran, dass der faserverstärkte Kunststoff einen Kunststoffkern der Welle umgibt. Der faserverstärkte Kunststoff ist also in einem Abstand von dem Zentrum der Welle angeordnet und kann deshalb wesentlich größere Drehmomente übertragen als ein an sich stärker belastbares Stahlseil, das bei herkömmlichen Wellen im Zentrum der Welle angeordnet ist. A shaft according to the invention combines the advantage of a low weight with the advantages of a high torsional and tensile strength and low manufacturing costs. By using fiber-reinforced plastic, lower weight and lower costs increase the rotational and tensile strength. Although fiber-reinforced plastics are generally less resilient than steel cables, a shaft according to the invention has a comparatively high torsional strength. This is because the fiber reinforced plastic surrounds a plastic core of the shaft. The fiber-reinforced plastic is thus arranged at a distance from the center of the shaft and therefore can transmit much larger torques than a per se more resilient steel cable, which is arranged in conventional waves in the center of the shaft.
Die Wendel, die Matrix des faserverstärkten Kunststoffs und der Kern der Welle können aus verschiedenen Kunststoffen hergestellt werden, um verschiedene Eigenschaften der Schnecke zu optimieren. Beispielsweise kann für die Wendel Polyurethan verwendet werden, was eine hohe Biegsamkeit und Abbriebfestigkeit ermöglicht. Für die Matrix des faserverstärkten Kunststoffs sind beispielsweise Duroplaste geeignet. Bevorzugt wird für die Matrix des faserverstärkten Kunststoffs Epoxidharz verwendet. Der Polymerkern der Welle kann beispielsweise aus Gummi sein. Bevorzugt ist der Polymerkern aus Kunststoff und kann deshalb auch als Kunststoffkern bezeichnet werden. Geeignete Kunststoffe sind thermoplastische Kunststoffe oder eine Elastomere, insbesondere Silikoneleastomere. Eine Erhöhung der mechanischen Belastbarkeit von Kunststoffen lässt sich bereits durch ungeordnete Fasern erreichen. Wesentlich besser ist es aber, wenn die Fasern in dem faserverstärkten Kunststoff geordnet enthalten sind, beispielsweise als Gewebe, Geflecht oder Gelege. Wenn die Fasern als Gelege in die Matrix eingebettet werden, ist es besonders vorteilhaft mehrlagige Gelege zu verwenden, wobei die Fasern verschiedener Lagen unterschiedlich orientiert sind, beispielsweise schräg zu einander. The helix, the matrix of the fiber reinforced plastic and the core of the shaft can be made of different plastics to optimize various characteristics of the screw. For example, can be used for the helix polyurethane, which allows high flexibility and Abbriebfestigkeit. For example, thermosets are suitable for the matrix of the fiber-reinforced plastic. Preferably, epoxy resin is used for the matrix of the fiber-reinforced plastic. The polymer core of the shaft can be made of rubber, for example. Preferably, the polymer core is made of plastic and can therefore also be referred to as a plastic core. Suitable plastics are thermoplastics or elastomers, in particular silicone elastomers. Increasing the mechanical strength of plastics can already be achieved by disordered fibers. Much better, however, it is when the fibers are contained in the fiber-reinforced plastic ordered, for example, as a fabric, braid or scrim. When the fibers are embedded as a scrim in the matrix, it is particularly advantageous to use multilayer scrims, wherein the fibers of different layers are oriented differently, for example obliquely to each other.
Die Fasern des faserverstärkten Kunststoffs können beispielsweise Glasfasern, Karbonfasern oder Kunststofffasern sein. Besonders gut geeignet sind Aramidfasern, Polyesterfasern, insbesondere aromatische Polyesterfasen, und Polyethylenfasen. Geeignete Fasen sind im Handel beispielsweise unter den Bezeichnungen Vectran oder Dyneema erhältlich. Weitere Einzelheiten und Vorteile der Erfindung werden an Ausführungsbeispielen unter Bezugnahme auf die beigefügten Zeichnungen erläutert. Es zeigen The fibers of the fiber-reinforced plastic may be, for example, glass fibers, carbon fibers or plastic fibers. Aramid fibers, polyester fibers, in particular aromatic polyester fibers, and polyethylene fibers are particularly suitable. Suitable chamfers are commercially available, for example, under the names Vectran or Dyneema. Further details and advantages of the invention will be explained with reference to embodiments with reference to the accompanying drawings. Show it
Fig. 1 eine teilweise geschnittene Seitenansicht eines Schneckenförderers; und Fig. 2 einen Längsschnitt eines Abschnitts der Schnecke des Schneckenförderers. Fig. 1 is a partially sectioned side view of a screw conveyor; and FIG. 2 shows a longitudinal section of a section of the screw of the screw conveyor.
Der in Fig. 1 schematisch, nicht maßstabsgetreu dargestellte Schneckenförderer hat einen Schlauch 1 und eine in dem Schlauch 1 angeordnete Schnecke 2, die aus einer Welle 21 und einer stoffschlüssig an der Welle 21 befestigten Wendel 22 besteht. In Fig. 2 ist ein Abschnitt der Schnecke 2 in einem Längsschnitt gezeigt. Die Wendel 22 ist durch Umspritzen der Welle 21 hergestellt und kann beispielsweise aus Polyurethan sein. Die Welle 21 hat einen Wellenkern 21a, der beispielsweise aus einem thermoplastischen Kunststoff bestehen kann. Der Wellenkern 21a ist mit einem faserverstärkten Kunststoff 21 b ummantelt. Zwischen der Wendel 22 und dem faserverstärkten Kunststoff 21 b können weitere Schichten angeordnet sein. Bei dem dargestellten Ausführungsbeispiel ist der faserverstärkte Kunststoff 21 b mit dem Material umspritzt, das die Wendel 22 bildet, also beispielsweise mit Polyurethan. Der Mantel aus faserverstärktem Kunststoff 21 b ist also von einem Mantel aus dem Material der Wendel 22 umgeben. Das Material der Wendel 22 kann beispielsweise ein Elastomer oder Duroplast sein. The screw conveyor shown schematically in FIG. 1, not to scale, has a hose 1 and a worm 2 arranged in the hose 1, which consists of a shaft 21 and a helix 22 fastened to the shaft 21 with a material fit. In Fig. 2, a portion of the screw 2 is shown in a longitudinal section. The coil 22 is made by molding the shaft 21 and may be made of polyurethane, for example. The shaft 21 has a shaft core 21 a, which may for example consist of a thermoplastic material. The shaft core 21 a is coated with a fiber-reinforced plastic 21 b. Between the coil 22 and the fiber reinforced plastic 21 b further layers may be arranged. In the illustrated embodiment, the fiber reinforced plastic 21 b is encapsulated with the material forming the helix 22, so for example with polyurethane. The jacket made of fiber-reinforced plastic 21 b is thus surrounded by a jacket made of the material of the coil 22. The material of the coil 22 may be, for example, an elastomer or thermosetting plastic.
Die Fasern sind in dem faserverstärkten Kunststoff geordnet enthalten, beispielsweise als Geflecht, Gewebe oder Gelege. Die Fasern sind bevorzugt Aramidfasern. Als Alternative können auch andere Kunststofffasern, Glasfasern oder Karbonfasern verwendet werden. Die Fasern sind in einer Kunststoffmatrix eingebettet, die beispielsweise aus Epoxidharz sein kann. The fibers are contained in the fiber-reinforced plastic ordered, for example as a braid, fabric or scrim. The fibers are preferably aramid fibers. As an alternative, other plastic fibers, glass fibers or carbon fibers may be used. The fibers are embedded in a plastic matrix which may be, for example, epoxy resin.
Die Welle 21 kann durch Extrusion und Pultrusion hergestellt und dann abschnittsweise zur Ausbildung der Wendel 22 umspritzt werden. Die Länge eines solchen Abschnitts, der bei einem Umspritzvorgang jeweils umspritzt wird, kann beispielsweise zwischen zwei und vier Periodenlängen der Wendel betragen. Indem nacheinander aneinander angrenzende Abschnitte umspritzt werden, kann eine Schnecke von praktisch beliebiger Länge hergestellt werden. Die Figuren 1 und 2 sind nicht maßstabsgetreu. Der Kern 21 der Welle 2 kann beispielsweise einen Durchmesser haben, der wenigstens die Hälfte des Außendurchmessers des Mantels aus faserverstärktem Kunststoff 21 b, vorzugsweise wenigstens zwei Drittel des Außendurchmessers des Mantels aus faserverstärktem Kunststoff 21 b beträgt. Besonders bevorzugt hat der Kunststoffkern 21 der Welle 2 einen Durchmesser, der wenigstens drei Viertel des Außendurchmessers des Mantels aus faserverstärktem Kunststoff 21 b beträgt. Der Durchmesser des Wellenkerns 21 beträgt bevorzugt nicht mehr als neun Zehntel, beispielsweise nicht mehr als vier Fünftel des Außendurchmessers des Mantels aus faserverstärktem Kunststoff 21 b. Bezugszeichenliste Schlauch The shaft 21 can be made by extrusion and pultrusion and then partially overmoulded to form the helix 22. The length of such a section, which is in each case encapsulated in an encapsulation process, can for example be between two and four period lengths of the coil. By successively molding adjacent sections, a screw of virtually any length can be made. Figures 1 and 2 are not to scale. The core 21 of the shaft 2 may, for example, have a diameter which is at least half the outer diameter of the cladding made of fiber-reinforced plastic 21 b, preferably at least two-thirds of the outer diameter of the cladding made of fiber-reinforced plastic 21 b. Particularly preferably, the plastic core 21 of the shaft 2 has a diameter which is at least three quarters of the outer diameter of the jacket made of fiber-reinforced plastic 21 b. The diameter of the shaft core 21 is preferably not more than nine-tenths, for example, not more than four-fifths of the outer diameter of the fiber-reinforced plastic jacket 21 b. List of numbers Hose
Schnecke  slug
Welle der Schnecke  Wave of the snail
Wendel der Schnecke Helix of the snail
a Kern der Welle 21a core of the shaft 21
b faserverstärkter Kunststoff b fiber-reinforced plastic

Claims

Patentansprüche Patent claims
Flexible Welle mit einem Polymerkern (21 a) und einem Mantel aus faserverstärktem Kunststoff (21 b), der den Polymerkern (21a) umgibt. Flexible shaft with a polymer core (21a) and a jacket made of fiber-reinforced plastic (21b) that surrounds the polymer core (21a).
Flexible Welle nach Anspruch 1 , dadurch gekennzeichnet, dass der faserverstärkte Kunststoff (21 b) eine Matrix hat, die aus einem anderen Material als der Polymerkern (21) ist. Flexible shaft according to claim 1, characterized in that the fiber-reinforced plastic (21 b) has a matrix which is made of a different material than the polymer core (21).
Flexible nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der faserverstärkte Kunststoff (21 b) eine Matrix aus Epoxidharz aufweist, in der die Fasern enthalten sind. Flexible according to one of the preceding claims, characterized in that the fiber-reinforced plastic (21 b) has a matrix of epoxy resin in which the fibers are contained.
Flexible Welle nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Fasern in dem faserverstärkten Kunststoff (21 b) geordnet sind. Flexible shaft according to one of the preceding claims, characterized in that the fibers are arranged in the fiber-reinforced plastic (21 b).
Flexible Welle nach Anspruch 4, dadurch gekennzeichnet, dass die geordneten Fasern in dem faserverstärkten Kunststoff (21 b) als Gewebe, Geflecht oder Gelege enthalten sind. Flexible shaft according to claim 4, characterized in that the ordered fibers are contained in the fiber-reinforced plastic (21 b) as a woven fabric, braid or scrim.
Flexible Welle nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Polymerkern (21 a) aus einem thermoplastischen Kunststoff oder einem Elastomer ist. Flexible shaft according to one of the preceding claims, characterized in that the polymer core (21 a) is made of a thermoplastic or an elastomer.
Flexible Welle nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der faserverstärkte Kunststoff (21 b) durch Glasfasern, Karbonfasern oder Kunststofffasern, vorzugsweise Aramidfasern, verstärkt ist. Flexible shaft according to one of the preceding claims, characterized in that the fiber-reinforced plastic (21 b) is reinforced by glass fibers, carbon fibers or plastic fibers, preferably aramid fibers.
Flexible Welle nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Polymerkern (21 a) der Welle (21 ) einen Durchmesser hat, der wenigstens die Hälfte des Außendurchmessers des faserverstärkten Kunststoffs (21 b), vorzugsweise wenigstens zwei Drittel des Außendurchmessers des faserverstärkten Kunststoffs (21 b) beträgt. Flexible shaft according to one of the preceding claims, characterized in that the polymer core (21 a) of the shaft (21) has a diameter which is at least half of the outer diameter of the fiber-reinforced Plastic (21 b), preferably at least two thirds of the outer diameter of the fiber-reinforced plastic (21 b).
9. Welle nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (21 ) durch Extrusion und Pultrusion hergestellt ist. 9. Shaft according to one of the preceding claims, characterized in that the shaft (21) is manufactured by extrusion and pultrusion.
10. Schneckenförderer mit 10. Screw conveyor with
einer Welle (21 ) nach einem der vorstehenden Ansprüche, a shaft (21) according to one of the preceding claims,
einem Schlauch (1) und a hose (1) and
einer Schnecke (2), die in dem Schlauch (2) angeordnet ist, wobei die Schnecke (2) die Welle (21 ) und eine stoffschlüssig mit der Welle (21 ) verbundene Wendel (22) aus Kunststoff aufweist. a screw (2) which is arranged in the hose (2), the screw (2) having the shaft (21) and a plastic helix (22) which is cohesively connected to the shaft (21).
1 1. Schneckenförderer nach Anspruch 10, dadurch gekennzeichnet, dass der faserverstärkte Kunststoff (21 b) eine Matrix hat, die aus einem anderen Material als die Wendel (22) ist. 1 1. Screw conveyor according to claim 10, characterized in that the fiber-reinforced plastic (21 b) has a matrix which is made of a different material than the helix (22).
12. Schneckenförderer nach Anspruch 10 oder 1 1 , dadurch gekennzeichnet, dass der Mantel aus faserverstärktem Kunststoff (21 b) mit dem Kunststoff, aus dem die Wendel (22) ist, ummantelt ist. 12. Screw conveyor according to claim 10 or 1 1, characterized in that the jacket made of fiber-reinforced plastic (21 b) is coated with the plastic from which the helix (22) is made.
13. Schneckenförderer nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass die Wendel (22) aus Polyurethan ist. 13. Screw conveyor according to one of claims 10 to 12, characterized in that the helix (22) is made of polyurethane.
PCT/EP2014/076179 2013-12-04 2014-12-02 Flexible shaft, and screw conveyor comprising a shaft of this type WO2015082437A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013105509.3 2013-12-04
DE201320105509 DE202013105509U1 (en) 2013-12-04 2013-12-04 Flexible shaft and screw conveyor with such a shaft

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WO2015082437A1 true WO2015082437A1 (en) 2015-06-11

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WO (1) WO2015082437A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2724071A1 (en) * 1977-05-27 1978-12-07 Gummi Jaeger Kg Gmbh & Cie Flexible screw of polyester for conveying powdery or granular material - mfd. integrally to avoid fouling by merchandise being conveyed
EP0432721A2 (en) * 1989-12-11 1991-06-19 David P. Goode Composite ski pole and method of making same
EP0560299A1 (en) * 1992-03-11 1993-09-15 Mitsubishi Cable Industries, Ltd. Flexible screw for conveyors
US20120129677A1 (en) * 2009-06-12 2012-05-24 Alfa Laval Corporate Ab Decanter centrifuge and a screw conveyer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018929C2 (en) 1980-05-17 1985-07-18 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Flexible screw for screw conveyors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2724071A1 (en) * 1977-05-27 1978-12-07 Gummi Jaeger Kg Gmbh & Cie Flexible screw of polyester for conveying powdery or granular material - mfd. integrally to avoid fouling by merchandise being conveyed
EP0432721A2 (en) * 1989-12-11 1991-06-19 David P. Goode Composite ski pole and method of making same
EP0560299A1 (en) * 1992-03-11 1993-09-15 Mitsubishi Cable Industries, Ltd. Flexible screw for conveyors
US20120129677A1 (en) * 2009-06-12 2012-05-24 Alfa Laval Corporate Ab Decanter centrifuge and a screw conveyer

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