DE2062378A1 - Thin-wall tubing - of soft thermoplastics with concave rollers in three planes for calibration - Google Patents

Thin-wall tubing - of soft thermoplastics with concave rollers in three planes for calibration

Info

Publication number
DE2062378A1
DE2062378A1 DE19702062378 DE2062378A DE2062378A1 DE 2062378 A1 DE2062378 A1 DE 2062378A1 DE 19702062378 DE19702062378 DE 19702062378 DE 2062378 A DE2062378 A DE 2062378A DE 2062378 A1 DE2062378 A1 DE 2062378A1
Authority
DE
Germany
Prior art keywords
rollers
soft
calibration
thin
hose
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
DE19702062378
Other languages
German (de)
Inventor
Günther 8263 Burghausen Pianka
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Priority to DE19702062378 priority Critical patent/DE2062378A1/en
Publication of DE2062378A1 publication Critical patent/DE2062378A1/en
Pending legal-status Critical Current

Links

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
    • B29C48/88—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
    • B29C48/907—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 using adjustable calibrators, e.g. the dimensions of the calibrator being changeable
    • 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
    • B29C48/90—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
    • B29C48/906—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 using roller calibration
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • B29C48/25—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

After extrusion, the tubing of soft PVC or polyethylene with a wall thickness 1 mm passes through compression rollers which cool the material to a shear modulus 108 dyn/cm2. The material then passes through an array of freely-rotating rollers to give a round profile through their concave profiles on three sides, the rollers being sand blasted or clad with PTFE to prevent surface markings. The purpose is to provide a calibration stage for soft thermoplastic tubing within thin walls.

Description

Äktenzeichen: Verfahren und Vorrichtung zur kontinuierlichen Herstellung von DUnnwandrohren beliebiger Länge aus weichen Thermoplasten" Die Erfindung betrifft ein Verfahren nebst Vorrichtung zur konus tinuierlichen Herstellung von Nnnwandrohren, d.h. von Rohren mit einer Wandstärke unter 1 mm, in beliebiger Länge aus weichen Thermoplasten, wie beispielsweise Weich-PVC oder Polyäthylen.Äktenzeichen: Process and device for continuous production of thin-walled pipes of any length made of soft thermoplastics "The invention relates to a process and device for the continuous production of thin-walled pipes, i.e. from pipes with a wall thickness of less than 1 mm, in any length from soft Thermoplastics such as soft PVC or polyethylene.

Xunststoffrohre mit dicken Wandstärken aus Hart-PVC, Polyäthylen, Polypropylen, Polyamid usw. werden nach bekannten Verfahren extrudiert und mit Hilfe von besonderen Vorrichtungen kalibriert. Bekannt sind die Xalibrierverfahren in wassergekühlten Kalibrierrohren mit Ueberdruck und Sohleppstopfen, Aussenkalibrierung durch Vakuum, für kleinere Durchmesser Kalibrierung mittels Ziehblenden und die Innenkalibrierung über gekühltem Ealibrierdorn, wie beispielsweise in den DAS 1 156 972, 1 157 378 oder in Gummi, Asbest, Kunststoffe" 7/1970,S.745-755 beschrieben.Plastic pipes with thick walls made of rigid PVC, polyethylene, Polypropylene, polyamide, etc. are extruded by known methods and using calibrated by special devices. The calibration procedures are known in water-cooled calibration pipes with overpressure and sole plugs, external calibration by vacuum, for smaller diameters calibration by means of pulling diaphragms and the Internal calibration using a cooled calibration mandrel, such as in DAS 1 156 972, 1 157 378 or in Gummi, Asbest, Kunststoffe "7/1970, p.745-755.

Diese zum Teil sehr aufwendigen Kalibriervorrichtungen, die unmittelbar an den Spritzkopf anschließen, sind für die Kalibrierung von lünnwandrohren", d.h. von Rohren mit Wandstarken unter 1 mm, vorzugsweise 0,25 - 0,5 mm, aus weichen Thermoplasten, z.3.Weich-PVC und Polyäthylen, wie sie für die Herstellung von Tuben benötigt werden, infolge der Gefahr des Pestklebens und des Äufreissens des sehr dünnen weichen Materiais an den Kalibrierrohren und -blenden nicht oder nur sehr bedingt geeignet.These calibration devices, some of which are very complex and directly connect to the spray head, are for the calibration of thin-walled pipes ", i.e. of pipes with a wall thickness of less than 1 mm, preferably 0.25 - 0.5 mm, made of soft thermoplastics, e.g. soft PVC and polyethylene, as required for the manufacture of tubes, as a result of the risk of plague sticking and the very thin, soft material being torn open Not suitable or only suitable to a limited extent on the calibration tubes and orifices.

Für daß Herstellen von dünnwandigen Ttibenrohrabschnitten ging man bisher in der Regel vom Flachschlauch aus, dessen Kalibrierung durch genaue Abstimmung der richtigen Verhältnisse von Ringdüsenspaltweite zu Schneckendrehzahl, Temperaturfuhrung, Abszugsgeschwindigkeit, Stützdruck im Inneren des Schlauches und Äbquetschdruck der Walzen ohne besondere Xalibriervorrichtung erfolgt. Die relativ kurzen Schlauchabschnitte dieser mehr oder minder stark abgequetschten und auf grosse Lauflängen gewickelte Schläuche wurden, um runde Tubenkörper zu erhalten, auf beheiztem Dorn wieder glattgebüldet. Man erhält auf diese Weise zwar runde Rohrkörper, kann aber die durch Einfrieren" fixierten Äbquetschfaltenmarkierungen nicht restlos entfernen, ohne die Maßdimensionen von Rohrdurchmesser und Wanddicke zu gefährden und auch das Aussehen der Rohre zu beeinträchtigen.For the production of thin-walled Ttibenrohr sections one went up to now usually from the flat hose, its calibration through precise coordination the correct proportions of the ring nozzle gap width to screw speed, temperature control, Pull-off speed, support pressure inside the hose and pinch pressure of the rollers is carried out without a special calibration device. The relatively short hose sections this more or less strongly squeezed and wound to great lengths In order to obtain round tube bodies, tubes were formed smooth again on a heated mandrel. In this way you get round tube bodies, but you can freeze the " Do not completely remove the fixed pinch crease markings without the dimensional dimensions of pipe diameter and wall thickness and also the appearance of the pipes affect.

Es wurde nun gefunden, daß man dünnwandige Rohre, d.h. Rohre mit Wandstärken unter 1 mm, vorzugsweise 0,25 - 0,5 mm, aus weichen Thermoplasten in beliebiger Länge herstellen kann, wenn man einen durch Extrusion in an sich bekannter Weise erhaltenen Blachschlauc*E bis zum Passieren der Äbquetschwalze nur bis oberhalb derweiligen Einfriertemperatur bzw. bis auf eine Temperatur abkühlt, bei welcher der Schermodul des verwendeten weichen lhermoplasten unter jo8 dyn/cm2 liegt und bei dieser Temperatur den Flachschlauch durch eine Rohraurundungsvorrichtung führt und anschließend dann bis zur völligen Steife abkühlt.It has now been found that thin-walled tubes, i.e. tubes with wall thicknesses less than 1 mm, preferably 0.25-0.5 mm, made of soft thermoplastics in any Can produce length if one is extrusion in a manner known per se obtained blachschlauc * E up to passing the squeeze roller only up to above intermittent freezing temperature or cools down to a temperature at which the shear modulus of the soft thermoplastic used is below jo8 dyn / cm2 and at this temperature leads the flat hose through a pipe rounding device and then cool down until it is completely rigid.

Diese erfindungsgemäße Rohraufrundungsvorrichtung, welche die Herstellung von Rohren beliebiger Länge gestattet, besteht aus wenigstens 2 freilaufenden Rollen, die unmittelbar hinter dem Walzenspalt der Äbquetschwalze angeordnet sind, wobei vorzugsweise' 3 freilaufende Rollen verwendet werden, die beispielsweise in Sig. 2 dargestellt sind und diese so angeordnet sind, daß ihre Rohren horizontal und vertikal quer zur Schlauchlaufriohtung liegen. In der Regel wird die querliegende untere Rolle mit ihren Lagern fest auf ihrer Achse sitzen, während die seitlichen Begrenzungsrollen auf der Achse der querliegenden Rolle verschieb- und arretierbar angeordnet sind, um einerseits bei Ärbeitsbeginn eine exakte Einfädelung des Thermoplastenschlauches vornehmen zu können und andererseits um den gewünschten oder den sich aus der Flachschlauchbreite sich ergebenden kreisförmigen Schlauchdurchmesser einstellen zu können. Selbstverständlich kann hierzu auch eine größere Anzahl von Rollen, beispielsweise 4 oder 6, kreisförmig angeordnet sein, darüberhinaus können, wie Fig. 4 zeigt, die Rollen konkav geschliffen sein, vorzugswetse in der Weise, daß die dadurch erzielten Rundungen sich bei Gebrauch derartiger Anordnungen zu 3/4 des Umfanges oder völlig zu einem Kreisbogen ergänzen.This pipe rounding device according to the invention, which the manufacture of pipes of any length, consists of at least 2 free-running rollers, which are arranged immediately behind the nip of the squeegee roller, wherein preferably '3 free-running rollers are used, for example in Sig. 2 are shown and these are arranged so that their tubes are horizontal and lie vertically at right angles to the direction of the hose. Usually the transverse lower roll with theirs Bearings sit firmly on their axis while move the lateral delimitation rollers on the axis of the transverse roller and are arranged in a lockable manner, on the one hand to ensure exact threading at the start of work to be able to make the thermoplastic hose and on the other hand to the desired or the circular tube diameter resulting from the flat tube width to be able to adjust. Of course, a larger number of Rollers, for example 4 or 6, can be arranged in a circle, in addition, as Fig. 4 shows, the rollers are ground concave, preferably in such a way that the curves achieved thereby increase when using such arrangements Add 3/4 of the circumference or completely to an arc.

In einer bevorzugten Ausführungsform der erfindungsgemäßen Anordnung sind zur Verhinderung des Anklebens des noch warmen, dünnwandigen Rohres die Rollen aus Stahl und durch Sendstrahlen mattiert oder mit einem ueberzug aus Polytetrafluoräthylen oder Silikonkautschuk versehen. Durch diese Maßnahme wird auch die äußere Oberfläche des Rohres vor unerwnschten Veränderungen, wie Kratzern, Streifen oder anderen Markierungen bewahrt. In a preferred embodiment of the arrangement according to the invention are the rollers to prevent the still warm, thin-walled pipe from sticking Made of steel and matted by emitted radiation or with a coating of polytetrafluoroethylene or silicone rubber. This measure also changes the outer surface the pipe against undesired changes, such as scratches, streaks or other marks preserved.

Zur Durchführung des erfindungsgemäßen Verfahrens werden zu nächst in an sich bekannter Weise Flachsohläuche hergestellt. To carry out the method according to the invention are to next Flachsohläuche produced in a known manner.

Der gesamte Vorgang, einschließlich der Vorstufen und unmittelbar folgenden Endstufen ist in Fig. 1 dargestellt. Die erfindungsgemäßen Rollen sind zeichnerisch in Fig. 2-4 dargestellt, ohne dieselben auf diese vorzugsweisen Ausführungsformen zu beschränken. Fig. 2 und 3 deuten zylindrische Rollen an, dagegen Fig. 4 die konkave Ausführungsform. Aus einem Extruder (a) mit einer RlngdUse tritt der Schlauch, zu welchem vorzugsweise PVC oder Polyäthylen geignet ist, aus und wird vom Förderband (b) übernommen und mit Hilfe der Luftkühlung (c) und derentspWechend temperierten Abquetschwalzen(d),bis auf eine Temperatur knapp oberhalb der Einfriertemperatur des Jeweiligen weichen plastischen Materials bzw. bis auf eine Temperatur, bei der der Schermodul der verwendeten Thermoplaste unter 108 dyn/cm2 liegt, abgekühlt Bei dieser Temperatur, bei welcher der Schlauch noch nicht erstarrt ist aber auch nicht mehr zusammenklebt, wird der Flachschlauch durch die erfindungsgemäße Rohrautrundungßvorrichtung (e), die aus mindestens drei Rollen, (beispielsweise Fig. 2, 3 und 4) besteht, deren Achsen quer und im rechten Winkel zur Schlauchlaufrichtung liegen, den Schlauch ganz oder zu 5/4 umschließend1 geführt und dort zum Rohr aufgeformt, nachdem die verstellbaren, seitlichen Begrensungsrollen so einreguliert waren, daß sich ein der Breite des zugeführten Blechschlauches entsprecwender Kreiedurohmesser des Rundachlauches ergibt. Anschließend wird in einem Kühlrohr (i) ganz abgekühlt, das Rohr # von einem Rohrraupenabzung (g) übernommen und beispielsweise einer kontinuierlich arbeitenden Äblängvorrichtung (h) zugeführt. The whole process, including the preliminary stages and immediate The following output stages are shown in FIG. The roles of the invention are graphically shown in Fig. 2-4, without the same to these preferred embodiments to restrict. FIGS. 2 and 3 indicate cylindrical rollers, whereas FIG. 4 indicates the concave ones Embodiment. The hose enters from an extruder (a) with a ring nozzle which is preferably PVC or polyethylene, and is from the conveyor belt (b) taken over and with the help of air cooling (c) and the corresponding tempered Squeeze rollers (d), down to one temperature just above the freezing temperature of the respective soft plastic material or up to a temperature at which the shear modulus of the thermoplastics used is below 108 dynes / cm2, cooled down at this temperature, at which the hose has not yet solidified, but also not sticks together more, the flat hose is rounded off by the pipe rounding device according to the invention (e), which consists of at least three roles, (e.g. Fig. 2, 3 and 4), their Axes are transverse and at right angles to the direction of travel of the hose, the hose wholly or 5/4 enclosing1 and formed there to the tube after the adjustable, lateral delimitation roles were regulated so that a The circular diameter of the round hose corresponds to the width of the supplied sheet metal hose results. Then it is completely cooled in a cooling tube (i), the tube # by one Rohrraupenabzung (g) taken over and, for example, a continuously working Elongation device (h) fed.

Die Kalibrierung erfolgt wie beim Flachschlauch durch sorgfältige Abstimmung der richtigen Verhältnisse von Ringdüsenspaltweite zu folgenden Faktoren: Schneckendrehzahl, Temperaturfttrung, Abzugsgeschwindigkeiten des Förderbandes, der Abquetechwalze, des Raupenabzuges, beispielsweise gemäß DAS 1 171-596, der Ablängvorrichtung, ferner zum Abquetschdruck der Walzen und zum Stützluftdruck im Inneren des Schlsuches.As with the flat hose, calibration is carried out carefully Coordination of the correct ratio of the ring nozzle gap width to the following factors: Screw speed, temperature supply, take-off speed of the conveyor belt, the squeegee roller, the caterpillar haul-off, for example according to DAS 1 171-596, the cutting device, also for the squeezing pressure of the rollers and for the support air pressure inside the hose.

Um das Aufrunden des Schlauches nach der Äbquetschwslze bei Temperaturen oberhalb der Jeweiligen Einfriertemperatur -bzw. Around the rounding of the hose after being squeezed in at temperatures above the respective freezing temperature -or.

bei der Temperatur, bei der der Schermodul des verwendeten weichen Thermoplastes unter 108 dyn/cm2 liegt, zu erleichtern, können die Rollen der Aufrundungsvorrichtung so konkav geschliffen werden, daß sie sich beim Zusammenschieben der seitflachen Begrenzungsrollen zur Schlauchachse und der mittleren querliegenden Rolle hin, dem genauen Durchmesser des zu erzeugenden "Dünnwandrohres" anpassen (Fig. 4). at the temperature at which the shear modulus of the soft used Thermoplastic is below 108 dynes / cm2, to facilitate the roles of the rounding device be ground so concave that they are when pushing together the side surfaces Limiting roles towards the hose axis and the middle transverse roller, the exact diameter of the "thin-walled pipe" to be produced (Fig. 4).

Des erfindungsgemäße Verfahren und die Vorrichtung gestatten die kontinuierliche Herstellung von sehr maßgenauen, "Dünnwandrohren" bzw. Rohrabschnitten in beliebigen Längen aus weichen thermoplastischen Kunststoffen ohne Äbquetschfaltenmarkierungen und mit gleicher Produktionsgeschwindigkeit wie beim isltschlauch, Jedoch ohne zusätzliche Kalibriervorrichtung.The inventive method and the device allow the continuous Manufacture of very dimensionally accurate, "thin-walled pipes" or pipe sections in any Lengths made of soft thermoplastics without pinch crease markings and with the same production speed as with isltschlauch, but without additional Calibration device.

Claims (7)

Patent- und Schutzensprtche:Patent and protection languages: 1. Verfahren zur kontinuierlichen Herstellung von Dünnwandrohren mit Wandstärken unter 1 mm, vorzugsweise 0,25 - 0,5 mm, in beliebigen Längen aus weichen Thermoplatten durch Extrusion, dadurch gekennzeichnet, daß man den zunächst in bekannter Weise erhaltenen Blachschlauch bis zum Passieren der Abquetschwalze nur bis oberhalb der Jeweiligen Einfriertemperatur bzw. bis auf eine Temperatur abkühlt, bei welcher der Schermodul des verwendeten weichen Thermoplastes unter 108dyn/cm2 liegt und bei dieser Temperatur den Flachsohlauch durch eine Rohraufrundungsvorrichtung führt und dann bis zur völligen Steife abkühlt.1. Process for the continuous production of thin-walled pipes with Wall thicknesses below 1 mm, preferably 0.25-0.5 mm, made of soft in any length Thermal plates by extrusion, characterized in that the first known Way obtained flexible hose up to passing the squeegee roller only up to above the respective freezing temperature or cools down to a temperature at which the shear modulus of the soft thermoplastic used is below 108 dynes / cm2 and at this temperature leads the flat tube through a tube rounding device and then cools down to a complete stiffness. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, zum Aufrunden von noch nicht völlig abgekühlten Blachschläuchen aus weichen Thermoplasten zum Rohr, dadurch gekennzeichnet, daß diese Rohraufrundungsvorrichtung aus wenigstens 2 freilaufenden Rollen besteht, die unmittelbar hinter dem Walzenspalt der Äbquetschwalze angeordnet sind. 2. Apparatus for performing the method according to claim 1, for Rounding up of soft thermoplastic hoses that have not yet cooled down completely to the pipe, characterized in that this pipe rounding device consists of at least There are 2 free-running rollers, which are directly behind the nip of the squeezing roller are arranged. 3. Vorrichtung nach Anspruch 2, bestehend aus 3 freilauf enden Rollen unmittelbar hinter dem Walenspalt der Abquetschwalzen, dadurch gekennzeichnet, daß diese Rollen mit ihren Achsen horizontal und vertikal quer zur Schlauchlaufrichtung angeordnet sind. 3. Apparatus according to claim 2, consisting of 3 free-running ends of rollers immediately behind the nip of the squeegee rollers, characterized in that these roles with their axes horizontally and vertically transversely to the direction of travel of the hose are arranged. 4. Vorrichtung nach Anspruch 2 und 3, dadurch gelennzeichnet, daß die untere querliegende Rolle mit ihren Lagern fest auf der Achse sitzt, während die seitlichen Begrenzungs-*-. rollen auf der Achse der querliegenden Rolle verschieb-und arretierbar angeordnet sind. 4. Apparatus according to claim 2 and 3, characterized in that the lower transverse roller with its bearings is firmly seated on the axle, while the lateral limitation - * -. roll on the axis of the transverse roll and shift Are arranged lockable. 5. Vorrichtung nach Anspruch 2 bis 4, dadurch gekennzeichnet, daß die Rollen konkav geschliffen sind.5. Apparatus according to claim 2 to 4, characterized in that the rollers are ground concave. 6. Vorrichtung nach Anspruch 2 bis 5, dadurch gekennzeichnet, daß die Oberfläche der Rollen durch Sandstrahlen mattiert ist.6. Apparatus according to claim 2 to 5, characterized in that the surface of the rollers is matted by sandblasting. 7. Vorrichtung nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Rollen mit einem Ueberzug aus Polytetrafluoräthlen oder Silikonkautschuk versehen sind.7. Apparatus according to claim 1 to 5, characterized in that the rollers are provided with a cover made of polytetrafluoroethylene or silicone rubber are.
DE19702062378 1970-12-18 1970-12-18 Thin-wall tubing - of soft thermoplastics with concave rollers in three planes for calibration Pending DE2062378A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19702062378 DE2062378A1 (en) 1970-12-18 1970-12-18 Thin-wall tubing - of soft thermoplastics with concave rollers in three planes for calibration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702062378 DE2062378A1 (en) 1970-12-18 1970-12-18 Thin-wall tubing - of soft thermoplastics with concave rollers in three planes for calibration

Publications (1)

Publication Number Publication Date
DE2062378A1 true DE2062378A1 (en) 1972-06-22

Family

ID=5791391

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702062378 Pending DE2062378A1 (en) 1970-12-18 1970-12-18 Thin-wall tubing - of soft thermoplastics with concave rollers in three planes for calibration

Country Status (1)

Country Link
DE (1) DE2062378A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0936052A1 (en) * 1998-02-04 1999-08-18 Röhm Gmbh Apparatus for calibrating extruded hollow plastic panels
EP1669185A1 (en) * 2004-12-10 2006-06-14 INOEX GmbH Apparatus for supporting extruded plastic profiles, in particular pipes, in an extrusion line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0936052A1 (en) * 1998-02-04 1999-08-18 Röhm Gmbh Apparatus for calibrating extruded hollow plastic panels
US6368098B2 (en) 1998-02-04 2002-04-09 Roehm Gmbh Chemische Fabrik Apparatus for the calibration of hollow chamber sheet extruded lines
EP1669185A1 (en) * 2004-12-10 2006-06-14 INOEX GmbH Apparatus for supporting extruded plastic profiles, in particular pipes, in an extrusion line

Similar Documents

Publication Publication Date Title
DE69808606T2 (en) Method for producing a drip irrigation hose and production line for carrying it out
DE1016009B (en) Process for the extrusion of hollow bodies made of thermoplastic material
DE1629716B2 (en) Method and device for the continuous application of a heat and sound insulating jacket layer on a metal pipe
DE1629788A1 (en) Method and device for the two-dimensional stretching of thermoplastic films, sheets and pipes
DE1504461B2 (en) Process and device for the continuous production of biaxially stretched, seamless tubes made of linear polyesters
DE3637459C2 (en)
DE3235024C2 (en)
DE2252084C3 (en) Process for the production of thermoplastic films
DE2939020C2 (en) Preform for blow molding a flat plastic bottle
DE2617140A1 (en) DEVICE FOR THE MANUFACTURING OF PIPES FROM STRAPS Wound In The Shape Of A SCREW
DE2555605C2 (en)
DE2040629A1 (en) Method and device for the production of plastic coatings
DE1175421B (en) Method and device for manufacturing hollow profiles from thermoplastic material
DE2532406B2 (en) Method and apparatus for the continuous production of a pipe from a web of a thermoplastic foam
DE2462586B2 (en) Process for making a sheet from a foamed thermoplastic
DE2062378A1 (en) Thin-wall tubing - of soft thermoplastics with concave rollers in three planes for calibration
DE1915768A1 (en) Method and device for the production of tubular objects from foamed thermoplastic resin
DE2536462A1 (en) PROCESS FOR PRODUCING RECTANGULAR HOLLOW PROFILES WITH NON-CIRCULAR CROSS-SECTION
DE2525898A1 (en) PROCESS FOR CONTINUOUS MANUFACTURING OF PLASTIC RESIN MOLDED BODIES WITH VARIATING CROSS-SECTIONAL AREA AND LENGTH PROFILE SHAPE
DE1704675A1 (en) Extrusion process for the continuous foaming of thermoplastics, in particular styrene polymer, to form profiled bodies
DE1273172C2 (en) Method and device for the continuous production of a strip of thermoplastic material
DE2412364C3 (en) Process for the production of moldings from thermoplastic, foamable material
DE1189261B (en) Method and device for the production of straight hoses with unequal wall thickness over the circumference made of thermoplastic material by extrusion, in particular of hoses for further processing into hollow bodies
DE3907748A1 (en) Process for continuously producing extruded sections from recycled plastics material and apparatus for carrying out the process
AT203201B (en) Method and device for the production of webs from plastically deformable masses