EP4118370A1 - Tuyau souple thermoplastique, et dispositif et procédé pour produire un tel tuyau souple - Google Patents

Tuyau souple thermoplastique, et dispositif et procédé pour produire un tel tuyau souple

Info

Publication number
EP4118370A1
EP4118370A1 EP21715778.3A EP21715778A EP4118370A1 EP 4118370 A1 EP4118370 A1 EP 4118370A1 EP 21715778 A EP21715778 A EP 21715778A EP 4118370 A1 EP4118370 A1 EP 4118370A1
Authority
EP
European Patent Office
Prior art keywords
hose
hose body
reinforcing element
extrusion unit
spiral
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.)
Pending
Application number
EP21715778.3A
Other languages
German (de)
English (en)
Inventor
Fabian SCHWARZ
Hardy WEISENBURGER
Thomas Becker
Andreas Hamburger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hc Kunststoffwerk Ruelzheim GmbH
Original Assignee
Hc Kunststoffwerk Ruelzheim 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 Hc Kunststoffwerk Ruelzheim GmbH filed Critical Hc Kunststoffwerk Ruelzheim GmbH
Publication of EP4118370A1 publication Critical patent/EP4118370A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/20—Articles comprising two or more components, e.g. co-extruded layers the components being layers one of the layers being a strip, e.g. a partially embedded strip
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/112—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements embedded in the wall
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/115—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements not embedded in the wall
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps

Definitions

  • the present invention relates to a hose with at least one reinforcing element and to a device and a method for producing such a hose.
  • Hoses are used in a large number of different areas of application. Since the hoses are usually flexible, i.e. bendable, they have the advantage over rigid pipes that they can be adapted comparatively easily to external conditions. In contrast to pipes, hoses can easily be guided along bent or twisted points.
  • the advantage of flexibility with regard to the spatial arrangement however, has the disadvantage that a hose can be kinked or squeezed so that the inner diameter of the hose is narrowed. In extreme cases, this can lead to a complete closure of the hose.
  • hoses are used to divert rainwater from body parts such as sunroofs or tank lids to the ground. These hoses are usually inserted manually in the almost completed vehicle. Due to the limited space available in the vehicle, these hoses have to be routed along narrow and curved paths. There is a risk that the hose will get into a squashed position or even be kinked during installation. A squashed or kinked hose means that water is not properly drained off the body. This can result in water stains or water damage inside the vehicle.
  • hoses that are on the one hand very flexible and on the other hand have a high level of security against accidental kinking or squeezing. It is known that a flexible hose which has a reinforcing band attached in a spiral shape to the outside of the hose body is more kink-resistant than a hose without such a reinforcing band.
  • the material band for the hose body is wrapped in an overlapping manner, so that the hose body is thicker than the material band at the seams.
  • the inner wall of the hose body is uneven.
  • depressions can even form in the inner wall of the hose body. If liquid media, such as water, are passed through the hose, the depressions form spaces in which the liquid medium can collect. From a hygienic point of view, this can be problematic because, for example, with water as the liquid medium, bacteria form in the water remaining in the depressions.
  • hoses produced according to the method described in EP 1 719 939 B1 are suitable for the flow of air, these hoses are only suitable to a limited extent for the flow of water.
  • the object of the present invention is to provide a flexible hose which has a comparatively high kink resistance, can be produced more cost-effectively and more quickly than hoses known hitherto and is particularly suitable for use as a water hose.
  • the object is achieved by a hose according to claim 1 and a device and a method for producing such a hose according to claims 10 and 10
  • the hose according to the invention comprises a flexible hose body, at least one reinforcement element which is arranged in a spiral shape on the outside of the hose body, wherein the at least one reinforcement element is made from an extruded material and is firmly connected to the outside of the hose body by means of a fusion connection, and the hose body a extruded hose body is.
  • extruded hose body instead of a hose wound from one or more strips of material has the advantage that the hose can be manufactured significantly more cost-effectively and more quickly.
  • the extruded hose does not have any seams or joints like a wound hose, so that there are no potential break points.
  • the extruded reinforcement element which is applied to the hose body directly from an extrusion unit, i.e. in the melted state, forms a solid and stable melt connection with the hose body.
  • the invention is based here preferably on an extruded hose which is produced by means of a stationary shaping tool and drawn off linearly or in a straight line.
  • the hose can be produced by means of a rotating molding tool, so that the hose rotates about its axis after exiting the extruder. In this case it is a rotating extruded tube.
  • the inner wall of the hose body is designed to be smooth.
  • This hose is therefore also suitable for use as a water hose in applications with high hygienic requirements.
  • This type of hose is particularly suitable for water hoses in which, for example, drinking water is transported, since there are no dead spaces inside the hose in which the water could collect.
  • a particularly smooth inner wall of the hose body is achieved in particular when the extruded hose is a linearly extruded hose.
  • a smooth surface is understood here to mean a surface that has no visible or noticeable unevenness. In particular, it is an area that does not obstruct the flow of a fluid through the hose line.
  • the extruded inner hose preferably has a nominal inner diameter which, in the longitudinal direction of the hose body, has fluctuations compared to the nominal diameter that are smaller than 5%, preferably smaller than 3%.
  • the inner wall of the hose body has a corrugation with an irregular wave length and / or with a long wave in the longitudinal direction of the hose. As a result, the flow velocity along the hose is as uniform as possible.
  • short wavelengths are in the range of the diameter of a hose, while long wavelengths have lengths that are a multiple of the diameter of a hose, namely at least 5 times, in particular up to 10 times, sometimes even up to 100 times.
  • the wavelengths of the fluctuations in the inside diameter are typically in the centimeter range of about 0.2 cm to 10 cm, while the wavelengths of the fluctuations in the inside diameter of linearly extruded hoses are more than 20 cm, typically more than 50 cm, sometimes even more than 1 m.
  • the distance between two adjacent depressions of the hose is greater than the distance between two windings of the reinforcing element, preferably even greater than the distance of five turns of the reinforcing element.
  • the reinforcement element can be applied to the hose with both a very small and a large spacing between the individual windings, since no or only very small combination effects of the reinforcement elements with the fluctuation in the thickness of the hose have to be taken into account.
  • significantly more than five windings can be applied between two adjacent depressions. It is not uncommon to have more than 50 turns between two adjacent indentations.
  • the at least one reinforcing element has at least one band-shaped or thread-shaped spiral element.
  • a ribbon-like or thread-like spiral element is understood here to mean both a flat ribbon of any cross-sectional shape and a thread of any cross-sectional shape.
  • the cross-sectional shapes can, for example, be round, oval, polygonal or arbitrarily curved.
  • a cross-sectional shape can have round and angular sections.
  • the reinforcement elements can be designed as a hollow profile in cross section. However, preference is given to the full-area or solid construction of the reinforcing elements in cross-section.
  • the at least one reinforcement element has at least two spiral elements which are arranged at a distance from one another and which are each arranged in a spiral shape on the outside of the hose body.
  • the at least two spiral elements arranged at a distance from one another are aligned parallel to one another, so that the turns of each spiral element have the same inclination. This ensures that the spiral elements do not overlap, even with long hoses.
  • the at least two spiral elements arranged at a distance from one another can have the same properties here.
  • the properties of the individual spiral elements can differ.
  • the at least one reinforcement element has a higher rigidity than the hose body.
  • the stiffness can be influenced by the number of turns per longitudinal section of a hose. The more turns are provided per longitudinal section of a hose, the stiffer the hose becomes.
  • the reinforcing element itself can have a higher rigidity than the hose body. This can be done, for example, by selecting a suitable material for the reinforcing element or by selecting the size and cross-sectional shape of the reinforcing element.
  • the adhesive strength between the flexible hose body and the at least one reinforcement element is at least 20% of the tensile strength of the weakest component.
  • a particularly high adhesive strength is achieved in particular by the fact that the extruded reinforcing element, which is applied to the hose body directly from an extrusion unit, i.e. in the melted state, hits the hose body which has just been produced and has not yet completely cooled.
  • a cover layer is provided in a preferred embodiment, which is provided on the outside of the hose body and covers the hose body and the at least one reinforcing element at least in sections.
  • the cover layer is preferably an extruded material.
  • the cover layer can, for example, be an extruded hose or be formed from an extruded band-like material which is wound around the hose body with a reinforcing element.
  • thermoplastic materials in particular extrudable thermoplastic materials such as PVC, TPE or PP, are suitable for producing the hose body described and the at least one reinforcing body. These materials can also be used for the top layer.
  • the present invention also relates to a device for producing a hose according to the invention, the device comprising a system unit which can be operated in a continuous process.
  • the system unit here comprises a first Extrusion unit for producing a hose body and a second extrusion unit for producing a reinforcing element, the second extrusion unit being arranged behind the first extrusion unit in the withdrawal direction of the hose and having a nozzle rotating around the hose body.
  • an extrusion unit is understood to mean a unit which comprises an extruder with an extruder screw and a shaping tool.
  • a nozzle here is the shaping tool itself or part of the shaping tool.
  • a stationary, in the sense of non-rotating, shaping tool is provided so that the hose body can be pulled off linearly and a linear, i.e. non-rotated or rotating hose body is formed.
  • a hose nozzle can be provided as a shaping tool.
  • the reinforcement element can be applied to the hose at a variety of different angles.
  • the number of windings per hose length can be set as desired and, in contrast to rotating hoses and a fixed shaping tool for the reinforcement element, does not depend on the speed of rotation of the hose.
  • the second extrusion unit has a stationary extruder and a rotating shaping tool with a nozzle or a shaping tool with a rotating nozzle. In this way, a comparatively inexpensive construction of the device can be achieved.
  • a third extrusion unit is provided, which is arranged behind the second extrusion unit in the withdrawal direction of the hose, the third extrusion unit preferably comprising a hose nozzle or a slot nozzle.
  • the third extrusion unit can be part of the plant unit with the first and second extrusion units or part of an additional plant unit which is separate from the plant unit with the first and second extrusion units.
  • a heating device is provided which is arranged behind the third extrusion unit in the withdrawal direction of the hose. This embodiment is particularly advantageous when the third extrusion unit comprises a slot die and the cover layer is wrapped around the hose with the at least one reinforcing element. With the aid of the heating system, the cover layer can be securely attached to the hose body with the at least one reinforcement element.
  • a heating device can be provided in order, for example, to securely connect the composite hose body, reinforcement element and cover layer by means of a fusion connection.
  • a method for producing a hose as described comprises the following steps: First, the hose body is extruded, the hose body being extruded in such a way that it does not rotate about its longitudinal axis. Furthermore, at least one band-like or thread-like reinforcing element is extruded, which is applied in a spiral shape to the hose body in the melted state.
  • the melting state in contrast to the solidified state, is understood to mean that state which the material has when it emerges from the extrusion unit and is thus still plastically deformable.
  • the process is characterized in that the extruded tube body is drawn off linearly and fed straight to the second extruder.
  • the hose emerging from the first extruder does not rotate around its axis.
  • the tape or thread-like reinforcing element is applied in a spiral shape to the hose drawn off from the extruder by wrapping the reinforcing element around the straight-line advancing hose.
  • the steps of extruding the hose body, extruding the at least one tape or thread-like reinforcing element and the spiral application of the reinforcing element onto the hose body are carried out in a continuous process, so that the tape-like or thread-like reinforcing element on the coming out of the extrusion unit , hose body that has not yet cooled down completely can be applied.
  • FIG. 2 shows a diagram to illustrate the method for setting up a hose
  • 3a-d shows a second embodiment of a hose
  • FIGS. 4a-d show a third embodiment of a hose
  • FIG. 5 shows a cross section through a spiral thread according to a first alternative embodiment
  • FIG. 6 shows a cross section through a spiral thread according to a second alternative embodiment
  • FIGS. 1a to 1d A hose 10 according to a first embodiment is shown in FIGS. 1a to 1d.
  • FIGS. 1b and 1c each show a longitudinal section through the hose 10.
  • a cross section through a hose is shown in FIG. 1d.
  • the hose 10 comprises a flexible hose body 12, a spiral-shaped reinforcing element 14 and a cover layer 16.
  • the diameter of the hose 10 is in the range from 2 mm to 70 mm.
  • the hose body 12 is an extruded hose body 12 with a predetermined first rigidity.
  • the inner wall and the outer wall of the hose body 12 are smooth and have no seams or joints.
  • the hose 10 and in particular the hose body 12 each have a predetermined nominal inner diameter, the fluctuations in the inner diameter of the hose body 12 compared to the nominal diameter in the longitudinal direction of the hose body 12 being less than 5%, preferably less than 3%. This involves long-wave fluctuations in the nominal inside diameter in the longitudinal direction of the hose body due to the extrusion.
  • the wavelength of the fluctuations in the nominal inside diameter is many times greater than the distance between the turns of the spiral reinforcing element 12. While the wavelengths of the fluctuations in the nominal inside diameter are approximately 0.5 m to 1.5 m, the distance between the turns is in the range of approx. 1 mm to 100 mm.
  • the spiral reinforcement element 14 consists of four spiral threads 18 arranged parallel to one another, the turns of which have a predetermined inclination with respect to the longitudinal axis of the hose 10.
  • the spiral reinforcement elements 14 are connected to the extruded hose body 12 in a materially bonded manner.
  • the spiral threads 18 have a fusion connection with the hose body 12.
  • the four spiral threads 18 arranged parallel next to one another are each arranged at the same distance from one another, so that, as can be seen in FIG.
  • each spiral thread 18 has an oval basic shape (see FIG. 1c), the spiral thread 18 being adapted to the geometry of the tube body 12 at the contact surface with the tube body 12.
  • the spiral thread 18 is an extruded, solid spiral thread 18.
  • the spiral reinforcing element 14 has a predetermined second rigidity.
  • the rigidity of the reinforcement element 14 is greater than the rigidity of the hose body 12.
  • the rigidity of the reinforcement element 14 is a parameter with the aid of which the kink resistance or kink resistance of the finished hose 10 can be influenced.
  • the cover layer 16 is an extruded tube element, the spiral threads 18 being embedded in the cover layer 16.
  • the cover layer 16 has a predetermined third rigidity.
  • the cover layer 16 is cohesive, in particular by means of a fusible link, connected to the hose body 12 and the reinforcing element.
  • the cover layer 16 has a rigidity which is at least less than the rigidity of the spiral thread 18.
  • Both the hose body 12 and the reinforcing element 14 as well as the cover layer 16 are made of thermoplastic materials such as TPE, PP or PVC.
  • FIG. 2 shows the basic method steps for producing a hose, such as the hose 10 shown in FIGS. 1a to 1d.
  • the hose body 12 is produced by means of a first extrusion unit in a first extrusion step 100.
  • a hose nozzle is used as a shaping tool so that the hose body can be drawn in a straight line, i.e. without rotating around its own axis, in the withdrawal direction.
  • the hose body 12 is then cooled in a known manner by means of a water bath.
  • the reinforcing element 14 is applied to the still warm or not completely cooled hose body 12 with the aid of a second extrusion unit.
  • the thermoplastic material of the reinforcement element 14 is melted in the second extrusion unit and, while still in the melted state, reaches the hose body 12 moving in the production direction or withdrawal direction as a thread or tape material
  • the second extrusion unit comprises a rotating nozzle that rotates around hose body 12.
  • the hose body 12 wrapped with a reinforcing element 14 arrives in a third extrusion step 120 to a third extrusion unit.
  • This third extrusion unit applies a cover layer 16 to the hose body 12 and the reinforcing element 14.
  • the hose emerging from the third extrusion unit is pre-assembled, i.e. cut at the desired points.
  • the three extrusion steps 100, 110, 120 take place continuously in a system for producing a hose.
  • the individual extrusion steps 100, 110, 120 there is no type of assembly in which the tube 10 is severed.
  • the system for implementing the method shown in FIG. 2 comprises three extrusion units, each extrusion unit having an extruder with an extruder screw and a shaping tool.
  • the system for implementing the method shown in FIG third extrusion unit comprises three extrusion units, each extrusion unit having an extruder with an extruder screw and a shaping tool.
  • the second extrusion unit for producing the reinforcement element comprises a stationary extruder and a rotating nozzle, either the nozzle itself rotating around the hose body or the forming tool in which the nozzle is installed rotates around the hose body.
  • the third extrusion unit is an extrusion unit for producing a tubular element.
  • the hose body provided with the reinforcement element is passed through the third extrusion unit.
  • an extrusion unit which has a rotating nozzle.
  • the nozzle can have one or more outlets.
  • a nozzle with four outlets was used in order to produce the four spiral ribbons arranged parallel to one another.
  • a further conveying path can additionally be provided, which leads to a packaging unit, in particular a separating device.
  • a heating device can also be provided downstream of the third extrusion unit and upstream of the finishing unit, for example in order to form an improved fusion connection between the cover layer and the hose body provided with the reinforcing element.
  • the corresponding system thus only comprises a first extrusion unit with a nozzle for the production of a tubular element such as the hose body, a conveying section, preferably with water cooling, a second extrusion unit and preferably a further conveying section, which leads, for example, to a packaging unit, in particular a separating device.
  • This process is particularly suitable for the production of hoses that do not require a top layer. However, it does not exclude the application of a top layer.
  • the third extrusion unit which provides the prefabricated hose body with a cover layer, is located in an additional system separate from the system with the first and second extrusion units.
  • the third extrusion unit in the separate system can be an extrusion unit which extrudes a tubular element and applies it to the prefabricated tubular body.
  • the extrusion unit can comprise a slot die and produce a strip of material that is wound onto the prefabricated hose body rotating around the longitudinal axis.
  • a thermal process step can be provided, by means of which the cover layer is melt-bonded to the hose body and the reinforcement element.
  • the materials should preferably be selected in such a way that, due to the fusion connection, there is a high level of adhesive strength between the hose body and the reinforcement element and / or the cover layer. If the selected materials do not achieve this adhesive strength, a step for applying an adhesion promoter can be provided both before the second extrusion step 110 and before the third extrusion step 120.
  • 3a to 3d and 4a to 4d each show a second and third embodiment of a hose 210; 310 shown.
  • the structure of the hose body 212; 312 and the cover layer 216; 316 as well as the manufacture of the hose 210; 310 do not differ in the embodiments shown in FIGS. 3a to 3d and 4a to 4d from the embodiment shown in FIGS. 1a to 1d.
  • the tubes 210 shown in FIGS. 3a to 3d and 4a to 4d; 310 thus have eight spiral threads 218; 318, which are arranged equidistantly around the outer circumference of the hose body 212 and 312, respectively.
  • the resistance to kinking of the hoses shown in FIGS. 3a to 3d and 4a to 4d is thus higher than in the case of the hose 10 shown in FIGS. 1a to 1d due to the higher number of spiral threads in a cross-sectional plane.
  • the tubes 210 shown in FIGS. 3a to 3d and 4a to 4d; 310 each differ in the angle of inclination of the spiral threads 218; 318 on the hose body 212; 312
  • the spacing and inclination of the spiral threads 218; 318 can be set via the process parameters such as the withdrawal or rotation speed of the rotating nozzle.
  • the distance and the inclination of the spiral threads 18; 218; 318 have an influence on the kink stiffness or kink stiffness of the finished hose 10; 210; 310
  • the geometry of the cross section of the spiral threads 18; 218; 318 can be selected as desired by means of the geometry of the nozzle of the forming tool. So can spiral threads 18; 218; 318 can be provided with a round or angular cross-section.
  • the cross section can also have rounded as well as angular sections
  • FIGS. 5 and 6 two different geometries of a cross section of a spiral thread are shown by way of example.
  • the cross section of a spiral thread 418 shown in FIG. 5 is triangular.
  • the cross section of the spiral thread 518 shown in Fig. 6 is trapezoidal. Otherwise, the hoses shown in FIGS. 5 and 6 do not differ from the hoses 10 shown so far; 210; 310
  • the hose 10; 210; 310 desired flexibility and kink resistance through a suitable choice of the rigidity of the individual components such as hose body 12; 212; 312 reinforcement member 14; 214; 314 and cover layer 16; 216; 316 can be set.
  • the flexibility of the hose body 12; 212; 312 and flexibility of the cover layer 16; 216; 316 can be determined primarily through the choice of material and the definition of the wall thickness of the Hose body 12; 212; 312 or the cover layer 16; 216; Set 316. The thicker the wall thickness of the hose body 112; 212; 312 or the cover layer 16; 216; 316 the stiffer the hose becomes.
  • the stiffness of the reinforcement member 114; 214; 314 can also be influenced by the choice of material.
  • the rigidity of the reinforcement element 14; 214; 314 can be set via the number of spiral threads, the size and cross-sectional shape of the spiral thread, the distance between the spiral threads and the inclination relative to the longitudinal axis of the hose.
  • the reinforcement element can have one or more spiral threads.
  • Several spiral threads can have the same distance from one another. However, the distance between more than two spiral threads can also vary.
  • spiral threads can all have the same properties.
  • properties of the spiral thread such as the mechanical and / or geometric properties, can differ.
  • thermoplastic materials specified above such as PVC are suitable as the material for the hose; TPE or PP.
  • TPE polymethyl methacrylate
  • PP polymethyl methacrylate
  • FIGS. 7a to 7c An alternative, fourth embodiment of a hose 610 is shown in FIGS. 7a to 7c.
  • the cover layer 616 rests on the reinforcing element 614, so that the hose 610 has a wavy profile on its outside.
  • the cover layer 616 is materially connected to the hose body 612 and the reinforcing element 614. Even if not shown, the cover layer can also be omitted from the hoses described.
  • hoses described are suitable for use as water hoses. Of course, they can also be used to guide any other fluids (liquids and gases).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un tuyau souple thermoplastique, lequel tuyau est constitué par un corps de tuyau souple (12 ; 212 ; 312 ; 612) et au moins un élément de renfort (14 ; 214 ; 314 ; 614), qui est disposé de manière hélicoïdale sur la face externe du corps de tuyau souple (12 ; 212 ; 312 ; 612), le ou les éléments de renfort (14 ; 214 ; 314 ; 614) étant faits d'un matériau extrudé et étant reliés de manière rigide à la face externe du corps de tuyau souple (12 ; 212 ; 312 ; 612) à l'aide d'une liaison par fusion, le corps de tuyau souple (12 ; 212 ; 312 ; 612) étant un corps de tuyau souple extrudé (12 ; 212 ; 312 ; 612). L'invention concerne également un dispositif et un procédé pour produire un tel tuyau souple.
EP21715778.3A 2020-03-12 2021-03-11 Tuyau souple thermoplastique, et dispositif et procédé pour produire un tel tuyau souple Pending EP4118370A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020106777.1A DE102020106777A1 (de) 2020-03-12 2020-03-12 Thermoplastischer Schlauch sowie eine Vorrichtung und ein Verfahren zur Herstellung eines solchen
PCT/EP2021/056168 WO2021180842A1 (fr) 2020-03-12 2021-03-11 Tuyau souple thermoplastique, et dispositif et procédé pour produire un tel tuyau souple

Publications (1)

Publication Number Publication Date
EP4118370A1 true EP4118370A1 (fr) 2023-01-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21715778.3A Pending EP4118370A1 (fr) 2020-03-12 2021-03-11 Tuyau souple thermoplastique, et dispositif et procédé pour produire un tel tuyau souple

Country Status (4)

Country Link
US (1) US20230175614A1 (fr)
EP (1) EP4118370A1 (fr)
DE (1) DE102020106777A1 (fr)
WO (1) WO2021180842A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1349843A (en) * 1970-04-16 1974-04-10 Creators Ltd Plastics tubes
DE2261126C3 (de) * 1972-12-14 1975-07-31 Herbert Dr.-Ing. 6243 Falkenstein Vohrer Verstärkter Schlauch
DE2820750C2 (de) * 1978-05-12 1983-03-24 Hans Grohe Gmbh & Co Kg, 7622 Schiltach Vorrichtung zum kontinuierlichen Aufbringen einer band- oder drahförmigen Verstärkungswendel auf einen Innenschlauch
IL105667A0 (en) * 1993-05-11 1993-09-22 Dorston Incorporation Limited Thermoplastic pipe
JP4568508B2 (ja) 2004-02-23 2010-10-27 カナフレックスコーポレーション株式会社 ホース
US9505164B2 (en) 2009-12-30 2016-11-29 Schauenburg Technology Se Tapered helically reinforced hose and its manufacture
US8936047B2 (en) * 2010-06-07 2015-01-20 Kongsberg Actuation Systems Ii, Inc. Reinforced hose assembly
DE102011018721A1 (de) 2011-04-26 2012-10-31 Rehau Ag + Co. Flexibler Schlauch und Verfahren zur Herstellung eines flexiblen Schlauches
DE102013111956A1 (de) 2013-10-30 2015-04-30 Egeplast International Gmbh Verfahren zur kontinuierlichen Fertigung von Kunststoffrohren

Also Published As

Publication number Publication date
WO2021180842A1 (fr) 2021-09-16
DE102020106777A1 (de) 2021-09-16
US20230175614A1 (en) 2023-06-08

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