WO2001012413A1 - Dispositif et procede pour la production de tubes ondules en plastique - Google Patents

Dispositif et procede pour la production de tubes ondules en plastique Download PDF

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Publication number
WO2001012413A1
WO2001012413A1 PCT/DE2000/002803 DE0002803W WO0112413A1 WO 2001012413 A1 WO2001012413 A1 WO 2001012413A1 DE 0002803 W DE0002803 W DE 0002803W WO 0112413 A1 WO0112413 A1 WO 0112413A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold cavity
annular gap
spray head
corrugator
plastic
Prior art date
Application number
PCT/DE2000/002803
Other languages
German (de)
English (en)
Inventor
Mile Voll-Marjanovic
Original Assignee
Unicor Gmbh Rahn Plastmaschinen
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
Priority claimed from DE19947434A external-priority patent/DE19947434B4/de
Application filed by Unicor Gmbh Rahn Plastmaschinen filed Critical Unicor Gmbh Rahn Plastmaschinen
Priority to EP00965768A priority Critical patent/EP1204522A1/fr
Priority to CA002391815A priority patent/CA2391815A1/fr
Priority to JP2001516738A priority patent/JP2003507207A/ja
Publication of WO2001012413A1 publication Critical patent/WO2001012413A1/fr

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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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
    • 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
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
    • 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

Definitions

  • the invention relates to a device for producing plastic tubes, preferably plastic corrugated tubes, in particular with a nominal diameter of ⁇ 10 mm, with at least one extrusion device, with at least one spray head connected downstream in the production direction and vertically oriented in the operating position, which has at least one annular gap, and with a downstream of the spray head in the production direction, vertically directed in the operating position, by moving mold jaws, e.g. Corrugator jaws formed mold cavity for shaping the plastic corrugated tube from at least one plastic melt jet emerging from the annular gap of the spray head.
  • moving mold jaws e.g. Corrugator jaws formed mold cavity for shaping the plastic corrugated tube from at least one plastic melt jet emerging from the annular gap of the spray head.
  • the invention further relates to a method for producing plastic pipes, preferably plastic corrugated pipes, in particular with a nominal width of ⁇ 10 mm, wherein a plastic mass, by means of an extrusion device from an annular gap of one of the extrusion devices downstream, which is directed vertically in the operating position, as a plastic melt.
  • a plastic mass by means of an extrusion device from an annular gap of one of the extrusion devices downstream, which is directed vertically in the operating position, as a plastic melt.
  • Beam into a through moving mold jaws, e.g. Corrugator jaws formed mold cavity is passed, in which the plastic melt jet is brought into shape by external negative pressure and / or by internal excess pressure.
  • Such a device with a method is known from DE 197 24 857 A1, but for the production of corrugated pipes with a large outside diameter of the order of 1 to 2 m.
  • the also vertically directed molding section is formed by corrugator jaws, which are adjusted in crawl steps by means of appropriately driven swivel arms. The one also directed vertically
  • Spray head protrudes relatively far into the molding section. It is combined with a calibration mandrel that extends through the molding section to the downstream end known, has compressed air channels for internal exposure to compressed air and cooling channels for liquid cooling. Relatively complex adjustment work is required to carry out the method, since the spray head with its downwardly projecting nozzle and calibration device must be precisely aligned in the molding section formed by the corrugator jaws. This device with a vertical corrugator is not suitable for the production of corrugated pipes of small nominal size, since with this vertical arrangement the adjustment and calibration work for shaped sections of small diameter would be practically impossible.
  • devices with horizontally directed corrugators are usually used to produce corrugated plastic pipes of small nominal size.
  • Such a device with method is e.g. known from DE 36 22 775 A1.
  • a corrugator is used there, the corrugator jaws of which are moved along two endless tracks.
  • the mold cavity formed by the corrugator jaws lies horizontally, the spray head nozzle engaging far into the mold cavity.
  • very long, thin nozzles are required for the production of pipes of small nominal size in order to ensure that a uniform pipe wall is obtained.
  • a disadvantage of the production, in addition to the adjustment problems, is the high back pressure resulting from the long, thin nozzles, with the result that the output is severely limited.
  • DE-AS 1 504 701 discloses a differently constructed device for producing plastic pipes. It uses a stationary calibration device with a downstream trigger device. The mold cavity is in the stationary calibration device is designed as a rigid hollow body. The device can only be used to produce pipes with a constant cross-section over their length, ie not corrugated pipes.
  • the extraction device T connected downstream of the calibration device pulls the tubular tube emerging from the annular gap of the nozzle through the mold cavity of the calibration device.
  • the same nozzle with a circular annular gap can be used universally in connection with different calibration devices with different cross-sectional shapes of the mold cavity, provided that the interior of the mold is made of the annular gap emerging, which is still plastically deformable, is not subjected to internal pressure.
  • the tube emerging from the annular gap could inflate before entering the mold cavity and collide with the inlet opening of the calibration device and jam there.
  • the device known from DE-AS 1 504 701 therefore requires a reliably operating, separate extraction device connected downstream of the mold cavity and does not allow the tube to be subjected to internal pressure.
  • the invention has for its object to provide a device and a method for producing corrugated plastic pipes in order to enable the production of corrugated plastic pipes, in particular of small nominal size, with little outlay on equipment and simple, practical implementation.
  • the solution provides that the annular gap of the nozzle device of the spray head is arranged outside the mold cavity, in that the annular gap is arranged at a distance or immediately adjacent to an upstream end of the mold cavity formed by the corrugator jaws.
  • the spray head or its nozzle device can thus be made relatively short axially become. Due to the vertical alignment of the spray head - unlike in the case of conventional horizontal alignment of the spray head and corrugator - there is no undesirable influence of gravity with the risk of uneven wall thickness. It is also possible to work with a lower external vacuum or internal pressure.
  • the method can be carried out in such a way that the diameter of the emerging plastic melt jet, preferably its inner diameter and / or its outer diameter, is determined and / or controlled by adjusting the distance from the annular gap to the upstream end of the mold cavity.
  • the distance between the annular gap and the upstream end of the mold cavity represents a production parameter which is dependent on the diameter of the plastic pipe to be produced and on the plastic material used.
  • the method can also be carried out in such a way that the diameter of the emerging plastic melt jet, preferably its inner diameter and / or its outer diameter, is determined by adjusting the ratio of the flow velocity of the plastic melt jet as it emerges from the annular gap relative to the production speed of the corrugator and / or is controlled. If the production speed of the corrugator is set to be greater than the exit speed of the molten plastic jet at the annular gap, depending on the set distance between the annular gap and the upstream end of the mold cavity, the elastic plastic melt jet emerging from the annular gap can be achieved until it enters is deliberately narrowed into the mold cavity.
  • the outside diameter of the annular gap is greater than or equal to that of the nominal diameter of the plastic pipe to be produced, preferably the effective inside diameter and / or the outside diameter of the plastic pipe to be produced.
  • the effective inside diameter for corrugated pipes is the inside free diameter in the area of the narrowing of the corrugation or for double or multi-wall pipes the inside diameter of the inner pipe.
  • the outer diameter of the annular gap is greater than or equal to the minimum inner diameter and / or maximum inside diameter and / or the minimum outside diameter and / or the maximum outside diameter of the plastic pipe to be produced.
  • the outer diameter of the annular gap is greater than or equal to the minimum inner diameter and / or the maximum inner diameter of the mold cavity.
  • the outer diameter of the nozzle must always be smaller than the diameter of the tube to be produced, since the nozzle immerses in the mold cavity and must lie within the inner diameter of the tube to be produced.
  • the invention allows the use of nozzles with a larger outer diameter for the production of pipes of the same or smaller nominal widths. This advantage is particularly evident when pipes with nominal diameters of less than or equal to 6 mm inside diameter are manufactured.
  • Pipes can be made which, in contrast to the conventional circular cross-sectional shape, have square, rectangular, triangular or triangular or oval cross-sectional shapes.
  • the mold cavity has a corresponding shape in cross section.
  • the nozzle or the annular gap respectively arranged outside the mold cavity can each have a conventionally round cross section. This means that the tubes with these special cross-sections can be manufactured with conventionally constructed nozzles.
  • Corrugators of conventional construction can be used. They are preferably only slightly modified. Corrugators can be used for the production of tubes with a special shape, which have a correspondingly modified shape of the mold cavity. In all versions, however, it is essential that the corrugator is arranged in the operating position in such a way that the molding section is aligned vertically with the mold cavity. Corrugators that migrate can be used Have corrugator jaws which are moved in crawl steps, for example by means of appropriately driven swivel arms, or which are driven in the manner of an endless belt.
  • the spray head is used vertically downwards, in particular so that the annular gap is arranged between the upper edge of the path of movement of the mold jaws and the upstream end of the mold cavity formed by the mold jaws or above the upper edge of the path of movement of the mold jaws.
  • this tubular end engages axially in the mold cavity over a length that is considerably shorter, for example, more than half shorter than the axial extension of the spray head or than that axial extension of an axially extending channel with an annular cross section in the spray head, which leads to the annular gap.
  • the position of the mold cavity or the corrugator is adjustable in the vertical and / or horizontal direction, preferably with the spray head in an unchanged position.
  • a particular advantage results from the vertical adjustment of the position of the mold cavity in relation to the injection head, since this enables a targeted expansion and consequent contraction of the extrudate, depending on the melt strength of the elastic plastic, so that extrudate is not pinched between the mold jaws.
  • the mold cavity or the corrugator can be pivoted about a horizontal axis.
  • the corrugator can thus be swiveled from its vertical operating position into a horizontal rest or maintenance position. In this horizontal position, the mold jaws can be easily adjusted or replaced. Furthermore, cleaning and
  • the spray head and / or the extruder preferably the extruder together with the spray head
  • the spray head and / or the extruder is adjustable relative to the corrugator in the operating position.
  • the extruder is preferably pivotable about a vertical axis or if the extruder is displaceable.
  • the extruder together with the spray head is placed in a side position in which the spray head is not directed into the mold cavity, but is laterally offset from the corrugator and the plastic melt jet is therefore not introduced into the corrugator.
  • a pressure generating device can be assigned to the mold cavity for generating negative pressure and / or excess pressure, with the aid of which the plastic mass of the plastic melt jet entering the mold cavity can be brought into contact with the inner wall of the mold cavity.
  • the spray head has an inner member, for example a support air tube, mandrel and / or cooling mandrel, which is supported on the spray head and extends to the downstream end of the spray head and forms the annular gap with the inner wall of the spray head. Provision can be made here for the inner member to extend parallel to the inner wall of the nozzle on the outflow side, with the formation of an outlet channel which is annular in cross section. It can be provided that the downstream end of the inner member ends in the area of the annular gap or protrudes from the annular gap.
  • an inner member for example a support air tube, mandrel and / or cooling mandrel
  • the end of the inner member projecting from the annular gap protrudes more or less into the mold cavity or ends directly at the upstream end of the mold cavity or does not protrude into the mold cavity and at a distance from it upstream end of the mold cavity ends, wherein the annular gap can preferably be arranged outside the mold cavity.
  • Figure 1 is a schematic front view of an embodiment of the device for
  • FIG. 2 shows a side view along arrow II in FIG. 1,
  • FIG. 3 shows a top view from above along arrow III in FIG. 1,
  • FIG. 4 shows a sectional view of a detail in the region of the spray head along section line IV-IV in FIG. 3 or one parallel to the image plane in FIG
  • FIG. 1 sectional plane A
  • Figure 5 is an enlarged view in Figure 4 in the area of the outflow
  • FIG. 6 shows a plan view corresponding to FIG. 3, but in the inoperative position with an extrusion device pivoted about a vertical axis together with the spray head
  • Figure 7 is a side view corresponding to Figure 2, but in
  • the device for producing corrugated plastic pipes is shown in FIGS. 1, 2 and 3 in different perspectives in the operating position.
  • the device 1 has an extrusion device 2, which is arranged on an upper level of a support frame 3.
  • the extrusion device 2 has an extruder 4, which is arranged horizontally in its axial extent on the above-mentioned upper level of the support frame 3.
  • the extruder can also be arranged vertically.
  • the extruder 4 has a funnel-like bulk material receptacle 5 on the inlet side and an outlet nozzle 6 on the outlet side.
  • a spray head 7 is connected to the outlet nozzle 6.
  • the spray head 7 lies outside the carrier frame and extends vertically downward.
  • a likewise vertically directed corrugator 8 is then arranged on the spray head 7 below.
  • the corrugator 8 is mounted on a carriage 10, which is movably supported on a vertical post 9 of the support frame 3. At the lower end of the corrugator 8, an outlet opening is formed, from which the finished plastic corrugated tube emerges.
  • a deflection roller 11 is mounted on the lower level of the support frame 3, via which the plastic corrugated tube emerging from the outlet opening of the corrugator 8 is deflected and pulled off to the left in the illustration in FIG. 1. From there it can be wound onto a supply roll, not shown.
  • the corrugator 8 is mounted on the post 9 on the post 9 so that it can move vertically.
  • the carriage 10 is motor-driven by means of a drive device 13 supported on the post 9.
  • the drive direction 13 has a drive motor 14 which drives a vertically directed spindle 15 mounted on the post.
  • the carriage for positioning and adjusting the corrugator 8 can be moved in the vertical direction via this motorized device.
  • a pivoting device 16 is provided, with which the corrugator 8 can be pivoted about a horizontal axis 20.
  • the pivot axis 20 is supported at one end on the slide 10 and at the other end in the housing of the corrugator 8.
  • a hand lever 17 is provided which is connected to the swivel axis 20 and is guided in a curved guide 17a.
  • the corrugator 8 can be pivoted into the inoperative position shown in FIG. In this position of the corrugator 8, maintenance and repair work can be carried out in a simple manner.
  • the corrugator 8 has, in a manner known per se, a vacuum device 18 with individually adjustable vacuum zones, with which a negative pressure is generated on the inner wall of a mold cavity 35 formed in the corrugator (see FIGS. 4 and 5) in order to engage the plastic material of the plastic melt stream to bring to the inner wall of the mold cavity.
  • the energy supply takes place via an energy supply band 19 which is connected to the corrugator 8 at its lower end.
  • the corrugator 8 is constructed in a manner known per se.
  • the mold cavity 35 which is circular in cross section, is arranged one above the other
  • Corrugator jaw pairs 36, 37 formed as in the. 4 and 5 can be seen.
  • the jaws 36, 37 assigned to one another in pairs are designed in cross section as half-ring segments which enclose an inner cavity which represents the mold cavity 35.
  • the jaws 36 and 37 are guided synchronously in two endless loops which run in a vertical plane.
  • the loop arranged on the left in FIGS. 4 and 5, which is formed from the jaws 36, is guided clockwise and the right loop, which is formed from the jaws 37, is guided in the counterclockwise direction.
  • the movement takes place via a motorized drive device 39.
  • the paired jaws 36, 37 are each joined together so that they tightly enclose the mold cavity 35.
  • the upstream upper end of the mold cavity 35 is formed by the upper radial inner edge of those jaws 36, 37, which are currently last in the assembled position.
  • this upper upstream end edge of the mold cavity is designated 40.
  • the spray head 7 shown in FIGS. 4 and 5 consists of an essentially cube-shaped or cuboid base body 71 and a nozzle device 72 connected to it.
  • the base body 71 is penetrated by an arcuate feed channel 73 which is connected to a right-hand one in the illustration in the figures Front side of the body 71 opens and opens out on the lower front side of the body 71.
  • the nozzle device 72 is connected to the downward outlet mouth of the feed channel 73. It consists of an upper nozzle body 74, in which a central channel 25 is formed, which is directed vertically downward and is aligned with the outlet mouth of the supply channel 73. Channel 75 tapers downwards. At the end of its exit, it has expanded somewhat.
  • a nozzle body 76 composed of several parts is connected.
  • a channel 77 with an annular cross section is formed, into which the channel 75 opens.
  • the channel 77 is formed between an inner body 78 which tapers conically downwards and an outer body 79 which also tapers and has an annular cross section.
  • Outer body 79 has a nozzle tip 80 screwed into it, into which the end of inner body 78 extends, with further narrowing of annular channel 77.
  • annular gap 70 is formed, which forms the outflow-side nozzle outlet.
  • a central channel 81 is also formed within the assembled body 76, which runs centrally through the inner body 78 and opens outwards at the same height as the annular gap 70. In the central channel 81, support air is supplied via a radial connecting channel 82 with an external connecting piece 83.
  • a multi-part heating jacket 85 is attached to the outer wall of the composite body forming the nozzle device 72. It has an electrical connection 86. Several in a row in the direction of flow arranged positions of the nozzle device are used in corresponding bores in the assembled nozzle body thermal sensor 87 for temperature measurement. A differential pressure meter 88, which is inserted in a corresponding radial bore in the nozzle housing 74, engages in the central channel 75.
  • the nozzle device 72 has a relatively short axial length compared to the conventionally used nozzle devices. This is possible because the spray head with the nozzle device 72 is directed vertically downward and the corrugator 8 is correspondingly designed with an axially vertically directed mold cavity 35.
  • the plastic melt jet which emerges from the annular gap 70 and is annular in cross section is brought into radial contact with the inner wall of the mold cavity by the negative pressure acting on the jet from the outside in the region of the inner wall of the mold cavity. Gravity acts evenly here. In contrast to this, in the conventional mode of operation with a horizontally directed nozzle and a horizontally arranged corrugator, gravity acts in the sense of an uneven deflection of the melt jet entering the corrugator.
  • the nozzle device 72 engages with its vertically downward, downstream, tapered end, at the free end of which the annular gap 70 is formed, in the upper region of the corrugator 8, specifically in a region in which the corrugator jaws 36, which are assigned to one another in pairs , 37 have not yet reached their joining position in which they form the mold cavity.
  • the annular gap 70 is arranged at a distance from the upstream end face of the mold cavity 35, that is to say above the end boundary edge 40 of the mold cavity 35.
  • the tapered, downstream section of the nozzle device 72 engages between the not yet closed mold jaws 36, 37.
  • the annular gap 70 lies between the upper boundary edge 40 of the mold cavity and the upper edge 41 of the path of movement of the circumferentially guided mold jaws 36, 37.
  • the nozzle end with the annular gap 70 does not therefore extend over one, as is customary in conventional work with corrugators certain minimum length axially into the mold cavity.
  • nozzle devices are used which have a significantly longer, downstream, tapered nozzle end, at the end of which the annular gap is formed.
  • the extrusion device 2 together with the spray head 7 connected to the nozzle 6 can, as shown in FIG. 6, be pivoted about a vertical pivot axis 21.
  • the pivot position of the extrusion device 2 shown in FIG. 6 can thus be adjusted, in which the spray head 7, which is still vertically directed, does not align axially with the corrugator 8, in contrast to the normal operating position.
  • This position is e.g. set to start up the extrusion device. Only after completion of the start-up operation is the extrusion device pivoted into the normal operating position shown in FIG. 3 and fixed there for operation via a locking lever 22 (FIG. 1).
  • the device works in normal operation for producing the plastic corrugated pipes as follows:
  • the plastic material fed via the funnel-shaped feed device 5 is pressed in the extruder 4 while extruding in the direction of arrow 25 in FIG. 1 to the left through the nozzle 6 into the spray head 7.
  • the spray head 7 has on the outflow side the nozzle device 72 with the annular gap 70, from which the plastic melt emerges as a jet of plastic melt with an annular cross section, directed essentially vertically downward.
  • This annular plastic melt jet thus enters the vertically directed axial mold cavity 35 of the corrugator 8 formed by the corrugator jaws 36, 37. Due to the negative pressure prevailing on the inner wall of the mold cavity 35, the material of the incoming plastic melt stream is brought into contact with the inner wall of the mold cavity 35.
  • the production speed of the corrugator 8 ie the speed of movement of the corrugator jaws 36, 37 downwards in the vertical direction, while they form the mold cavity, is greater than that Exit velocity of the plastic melt jet at the annular gap 70, a constriction is formed in the tubular extrudate towards the end of entry into the mold cavity 35.
  • the finished corrugated plastic pipe exits via the outlet opening at the lower end of the corrugator 8 at the front.
  • the finished corrugated plastic tube is then deflected over the deflection roller 11 and drawn off at the lower level of the support frame 3 into a storage station, not shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif pour la production de tubes ondulés en plastique ayant des sections nominales inférieures à 10 mm. Le dispositif selon l'invention comprend un dispositif d'extrusion (2), une tête d'extrudeuse (7) orientée verticalement et un appareil à ondulation des semi-produits (8) orienté verticalement et présentant une cavité verticale (35). La tête d'extrudeuse (7) présente une buse relativement courte axialement à fente annulaire (70) et elle est disposée de telle façon que la fente annulaire (70) se trouve hors de la cavité (35), avec un écart par rapport à l'extrémité frontale supérieure côté écoulement de la cavité (35).
PCT/DE2000/002803 1999-08-18 2000-08-16 Dispositif et procede pour la production de tubes ondules en plastique WO2001012413A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP00965768A EP1204522A1 (fr) 1999-08-18 2000-08-16 Dispositif et procede pour la production de tubes ondules en plastique
CA002391815A CA2391815A1 (fr) 1999-08-18 2000-08-16 Dispositif et procede pour la production de tubes ondules en plastique
JP2001516738A JP2003507207A (ja) 1999-08-18 2000-08-16 波形プラスチック管を製造する装置および方法

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19939362.1 1999-08-18
DE19939362 1999-08-19
DE19947434.6 1999-10-02
DE19947434A DE19947434B4 (de) 1999-08-19 1999-10-02 Vorrichtung und Verfahren zum Herstellen von Kunststoff-Wellrohren

Publications (1)

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WO2001012413A1 true WO2001012413A1 (fr) 2001-02-22

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PCT/DE2000/002803 WO2001012413A1 (fr) 1999-08-18 2000-08-16 Dispositif et procede pour la production de tubes ondules en plastique

Country Status (4)

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EP (1) EP1204522A1 (fr)
JP (1) JP2003507207A (fr)
CA (1) CA2391815A1 (fr)
WO (1) WO2001012413A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8167603B2 (en) 2004-08-18 2012-05-01 Drossbach Gmbh & Co. Kg Device for the production of corrugated pipes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006048512B4 (de) 2006-10-13 2014-03-06 Ralph Peter Hegler Vorrichtung zur Herstellung von Verbund-Rohren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1486052A1 (de) * 1964-06-30 1969-04-03 Shell Int Research Verfahren und Vorrichtung zum Formen,Fuellen und Verschliessen von Behaeltern
US4504206A (en) * 1982-01-21 1985-03-12 Lupke Manfred Arno Alfred Chainless mold drive for a corrugator or the like
WO1999017916A1 (fr) * 1997-10-03 1999-04-15 Lupke Manfred Arno Alfred Appareil de moulage comportant un tunnel constitue de blocs de moulage se deplaçant vers le bas
US6015282A (en) * 1997-06-12 2000-01-18 Unicor Gmbh Rahn-Plastmaschinen Apparatus for the production of corrugated plastic tubes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1486052A1 (de) * 1964-06-30 1969-04-03 Shell Int Research Verfahren und Vorrichtung zum Formen,Fuellen und Verschliessen von Behaeltern
US4504206A (en) * 1982-01-21 1985-03-12 Lupke Manfred Arno Alfred Chainless mold drive for a corrugator or the like
US6015282A (en) * 1997-06-12 2000-01-18 Unicor Gmbh Rahn-Plastmaschinen Apparatus for the production of corrugated plastic tubes
WO1999017916A1 (fr) * 1997-10-03 1999-04-15 Lupke Manfred Arno Alfred Appareil de moulage comportant un tunnel constitue de blocs de moulage se deplaçant vers le bas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8167603B2 (en) 2004-08-18 2012-05-01 Drossbach Gmbh & Co. Kg Device for the production of corrugated pipes

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EP1204522A1 (fr) 2002-05-15
JP2003507207A (ja) 2003-02-25
CA2391815A1 (fr) 2001-02-22

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