DE10250236A1 - Haul off plant for extruded thermoplastic pipe with internal rib has guide rolls which align pipe at an angle to extrusion direction and induce a rotation of the pipe - Google Patents
Haul off plant for extruded thermoplastic pipe with internal rib has guide rolls which align pipe at an angle to extrusion direction and induce a rotation of the pipe Download PDFInfo
- Publication number
- DE10250236A1 DE10250236A1 DE10250236A DE10250236A DE10250236A1 DE 10250236 A1 DE10250236 A1 DE 10250236A1 DE 10250236 A DE10250236 A DE 10250236A DE 10250236 A DE10250236 A DE 10250236A DE 10250236 A1 DE10250236 A1 DE 10250236A1
- Authority
- DE
- Germany
- Prior art keywords
- pipe
- angle
- haul
- extrusion
- extrusion direction
- 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.)
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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
- 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
- B29C48/355—Conveyors for extruded articles
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
- B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/18—Pleated or corrugated hoses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Rohres mit mindestens einem Innensteg aus einem thermoplastischen Kunststoff durch Extrusion; sie betrifft weiter eine Vorrichtung zum Durchführen dieses Verfahrens.The invention relates to a method for the production of a tube with at least one inner web a thermoplastic by extrusion; it concerns further an apparatus for performing this method.
Kunststoff-Rohre mit Innenstegen werden vorteilhaft als Rohre zum Fördern fließfähiger Gemische, die zu mischen sind oder deren Vermischung aufrecht zu erhalten bzw. wieder herzustellen ist, eingesetzt. Problematisch ist es dabei, dass sich in diesem Rohr eine für dieses technische Problem hinreichende Strömungsform einstellt. Dazu wird das Kunststoffrohr vorteilhaft so ausgebildet, dass der/die Innensteg/-stege mit einer schraubenförmigen Wendelung versehen ist. Das Herstellen eines solchen Rohres mit einem (oder mehreren) gewendelten Innensteg/-gen ist jedoch nicht ohne weiteres möglich.Plastic pipes with inner bars are advantageous as pipes for conveying flowable mixtures that mix are to be maintained or their mixing maintained or restored is used. It is problematic that this Tube one for this technical problem sets sufficient flow shape. This will the plastic tube is advantageously designed such that the inner web (s) with a helical Spiral is provided. The manufacture of such a pipe with one (or more) coiled inner web / ridges is not easily possible.
Somit stellt sich die Aufgabe ein Verfahren anzugeben, mit dem die Herstellung eines solchen Rohres auf Extrusionsbasis einfach und wirtschaftlich erfolgen kann; in Weiterführung der Aufgabenstellung soll darüber hinaus eine Vorrichtung angeben werden, mit der dieses Verfahrens vorteilhaft und wirtschaftlich durchgeführt werden kann.Thus the task arises Specify the process by which such a pipe is manufactured can be done easily and economically on an extrusion basis; in continuation the task should be about In addition, a device will be specified using this method can be carried out advantageously and economically.
Diese Aufgabenstellung wird mit den kennzeichnenden Merkmalen des Hauptanspruchs gelöst; vorteilhafte Weiterbildungen und bevorzugte Ausführungsformen beschreiben die Unteransprüche.This task is accomplished with the characteristic features of the main claim solved; advantageous further training and preferred embodiments describe the subclaims.
Zur Extrusion wird ein thermoplastischer Kunststoff – etwa Polymerisate, wie Polyethylen, Polypropylen, Polyvinylchlorid, Polykondensate, wie Polycarbonate, Polyamide oder Polyaddukte, wie Polyurethane. Vorteilhaft wird auch ABS (Acrylnitril-Butadien-Styrol) eingesetzt. Das ausgewählte Thermoplast wird durch Erhitzen verflüssigt und durch ein die gewünschte Form gebendes Mundstück des Extruders ausgepresst, aus dem das so geformte Rohr in einem noch weichen Zustand austritt und in einer nachfolgenden Kühlstrecke mit Wasserbad, Luftkühlung o.dgl. abgekühlt wird. In der Kühlstrecke abgekühlt, ist das Rohr im Wesentlichen starr und wird von einem Abzugsband erfasst, das es in Übereinstimmung mit der Austrittsgeschwindigkeit abführt.A thermoplastic material - such as polymers, such as polyethylene, polypropylene, polyvinyl chloride, polycondensates, such as polycarbonates, polyamides or polyadducts, such as polyurethanes. ABS (acrylonitrile-butadiene-styrene) is also advantageously used. The selected one Thermoplastic is liquefied by heating and by the desired shape giving mouthpiece of the extruder, from which the tube thus formed in one still soft state emerges and in a subsequent cooling section with water bath, air cooling or the like. chilled becomes. In the cooling section cooled, the pipe is essentially rigid and is pulled by a trigger detected that it was in accordance dissipates at the exit speed.
Um nun eine Wendelung des bei seiner Entstehung geraden Steges zu erreichen, wird nach der Erfindung das extrudierte Rohr im Bereich seines abgekühlten und somit starren Teils um seine Achse verdreht. Dazu wird es einer Abzugsvorrichtung zugeführt. Diese besteht aus einem schräg zur Extrusionsrichtung stehenden Abzugsförderer mit einem Rollenpanzer und zumindest einer Anpressrolle. Die Anpressrollen sind in einem dem Rohrdurchmesser entsprechenden, einstellbaren Abstand oberhalb des Rollenpanzers angeordnet mit einer Ausrichtung ihrer Achsen in einer zu den Achsen der Rollen des Rollenpanzers parallelen Ebene und rechtwinklig zur Extrusionsrichtung. Mit diesen Anpressrollen wird das extrudierte Kunststoffrohr auf den Rollenpanzer gedrückt, der infolge seiner Bewegung eine Kraft auf das Kunststoffrohr ausübt. Wegen der Winkellage wirkt diese Kraft zum einen mit einer Komponente in Laufrichtung des Kunststoffrohres und bewirkt das Abziehen. Die andere Kraftkomponente wirkt rechtwinklig dazu als Tangentialkraft und bewirkt ein Verdrehen des Kunststoffrohres. Dabei wirkt dieses Verdrehen über das infolge der Kühlung erstarrte Rohrteil zurück auf den Rohrteil der gerade aus dem Mundstück des Extruders ausgetreten ist und sich noch in einem weichen, verformbaren Zustand befindet. Auf diese Weise wird die gewünschte Wendelung des Innensteges erreicht.To now turn his Achieving straight web formation is according to the invention the extruded tube in the area of its cooled and thus rigid part twisted around its axis. For this purpose, it is fed to an extraction device. This consists of an oblique Discharge conveyor facing the direction of extrusion with a roller armor and at least one pressure roller. The pressure rollers are in one adjustable distance above the pipe diameter of the roll armor arranged with an alignment of their axes in a plane parallel to the axes of the roles of the role armor and perpendicular to the direction of extrusion. With these pressure rollers the extruded plastic tube is pressed onto the roller armor, which exerts a force on the plastic tube due to its movement. Because of the angular position affects this force with a component in the direction of the plastic pipe and pulls it off. The other force component acts at right angles to it as a tangential force and causes the plastic tube to twist. This works Twisting over due to the cooling solidified pipe part back on the pipe part that just emerged from the mouthpiece of the extruder and is still in a soft, deformable state. This way the one you want Spiraling of the inner web achieved.
Bei Beginn des Extrudierens ist das Kunststoffrohr noch nicht so rund ausgeformt, dass ein Verdrehen möglich ist. In diesem Fall bewirkt die Kraftkomponente rechtwinklig zur Extrusionsrichtung ein Mitnehmen des Kunststoffrohres. Gleiches gilt, wenn das Kunststoffrohr nicht die hinreichende Starrheit aufweist. In diesem Fall ist es vorteilhaft, wenn Führungsrollen vorgesehen sind. Diese Führungsrollen sind in Extrusionsrichtung angeordnet, mit Achsen rechtwinklig zu den Achsen der Rollen des Rollenpanzers. Dabei können die Führungsrollen so vorgesehen sein, dass die Bewegung des Rollenpanzers das extrudierte Kunststoffrohr gegen diese Führungsrollen drückt. Insbesondere bei der Extrusion von Kunststoffrohren aus Hart-PVC oder ähnlich harten Kunststoffen, bei denen die Starrheit nach Kühlung hinreichend ist, können diese Führungsrollen auch auf der entgegengesetzten Seite des Kunststoffrohres vorgesehen werden, wobei dann die Führungsrolle am Einlauf des Kunststoffrohres dessen Ausbiegen unterbindet.At the start of extrusion it is Plastic tube is not yet so rounded that it can twist possible is. In this case, the force component acts perpendicular to Extrusion direction take the plastic tube. The same applies if the plastic pipe is not sufficiently rigid. In this case, it is advantageous if guide rollers are provided. These are leadership roles arranged in the direction of extrusion, with axes perpendicular to the Axes of the roles of the role armor. The guide rollers can be provided in this way be that the movement of the roll armor is the extruded plastic tube against these leadership roles suppressed. Especially when extruding plastic pipes made of rigid PVC or similar hard plastics, where the rigidity after cooling is sufficient is, can these leadership roles too provided on the opposite side of the plastic tube then, taking the lead prevents the plastic tube from bending out at the inlet.
Das Abziehen des Rohres erfolgt entsprechend der Extrusionsgeschwindigkeit mit dem im Winkel zur Extrusionsrichtung angestellten Rollenpanzer des Abzugförderer, wobei dieser das Rohr während des Abziehens gegen die Führungsrollen andrückt. Hierdurch rollt das extrudierte Rohr schräg über den flachen Rollenpanzer ab, infolge dieser Geometrie greifen Axial-Kräfte an dem Rohr an, die den zum Verdrehen des Rohres benötigten Drall erzeugen. Bei einem 63 mm Rohr und einer Anstellung der Rollenpanzers gegenüber der Extrusionsrichtung von 11,2° wird das Rohr, und somit auch der Innensteg, einmal pro Meter gedreht.The pipe is pulled off accordingly the extrusion speed with that at an angle to the extrusion direction employed roll armor of the trigger conveyor, this the tube during the Pulling against the guide rollers. hereby rolls the extruded pipe diagonally over the flat roller armor, due to this geometry, axial forces act on the Tube that generate the twist required to twist the tube. at a 63 mm tube and an inclination of the roller armor against the Extrusion direction of 11.2 ° the tube, and thus the inner web, rotated once per meter.
Um Rohre mit unterschiedlichen Durchmessern herstellen zu können, sind diese Andrückrollen in ihrer Höhe über dem Abführband verstellbar. Um weiter den auf dem Abführband ausgedrückte Teil des Rohres in Bezug auf seine Winkellage in dieser zu halten, sind weiter zumindest zwei einseitig an dem Rohr angreifende, in einer Linie liegende Führungsrollen vorgesehen. Vorteilhaft sind diese Führungsrollen in Extrusionsrichtung hinter den Andrückrollen angeordnet.For pipes with different diameters to be able to manufacture are these pressure rollers in their height above Discharge Conveyor adjustable. To continue the part of the To keep Rohres in relation to its angular position are further at least two in one line engaging on the pipe lying guide rollers intended. These guide rollers in the direction of extrusion are advantageous behind the pressure rollers arranged.
Um die Winkellage zum Abführförderer zu erhalten ist der Abzugförderer gegenüber der Extrusionsrichtung verschwenkbar. Da die Führungsrollen immer in Extrusionsrichtung liegen, sind diese derart montiert, dass deren Winkellage zur Laufrichtung des Rollenpanzers des Abführförderer verstellbar ist. Bei einem spitzen Winkel zwischen den Führungsrollen und dieser Laufrichtung des Rollenpanzers stellt sich eine flache Steigung der Wendel des Steges ein, umgekehrt wird mit einem stumpfer werdenden Winkel diese Steigung größer.In order to maintain the angular position to the discharge conveyor, the discharge conveyor is opposite the Extrusi direction swiveling. Since the guide rollers always lie in the direction of extrusion, they are mounted in such a way that their angular position is adjustable in relation to the running direction of the roller armor of the discharge conveyor. With an acute angle between the guide rollers and this running direction of the roller armor, there is a flat slope of the helix of the web, conversely, this slope becomes greater with an increasingly obtuse angle.
Das Wesen der Erfindung wird an Hand
der in den
Die Abzugsvorrichtung
Um ein aus mehreren Komponenten bestehendes
Material durch ein solches Rohr zu fördern, ohne dass eine Entmischung
auftritt, muss der Materialströmung
ein gewisser Drall vorgegeben werden. Dies geschieht zweckmäßig mittels
eines radial in das Innere des Kunststoffrohres
Um diese Wendelung des Kunststoffrohres
Das auf das hinlaufende Trum
Um Kunststoffrohre unterschiedlichen Durchmessers
herstellen zu können,
sind die Anpressrollen
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10250236A DE10250236B4 (en) | 2002-10-29 | 2002-10-29 | Process for producing a plastic pipe with at least one inner web |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10250236A DE10250236B4 (en) | 2002-10-29 | 2002-10-29 | Process for producing a plastic pipe with at least one inner web |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10250236A1 true DE10250236A1 (en) | 2004-05-19 |
DE10250236B4 DE10250236B4 (en) | 2005-07-07 |
Family
ID=32114892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10250236A Expired - Fee Related DE10250236B4 (en) | 2002-10-29 | 2002-10-29 | Process for producing a plastic pipe with at least one inner web |
Country Status (1)
Country | Link |
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DE (1) | DE10250236B4 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7100665A (en) * | 1971-01-18 | 1972-07-20 |
-
2002
- 2002-10-29 DE DE10250236A patent/DE10250236B4/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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DE10250236B4 (en) | 2005-07-07 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |