DE1228399B - Process for the production of hollow plastic bodies, such as pipes or the like. - Google Patents

Process for the production of hollow plastic bodies, such as pipes or the like.

Info

Publication number
DE1228399B
DE1228399B DED37671A DED0037671A DE1228399B DE 1228399 B DE1228399 B DE 1228399B DE D37671 A DED37671 A DE D37671A DE D0037671 A DED0037671 A DE D0037671A DE 1228399 B DE1228399 B DE 1228399B
Authority
DE
Germany
Prior art keywords
pipes
nozzle
stiffening elements
hollow
hollow body
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
DED37671A
Other languages
German (de)
Inventor
Josef Helmut Danzer
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.)
Individual
Original Assignee
Individual
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 to NL286641D priority Critical patent/NL286641A/xx
Application filed by Individual filed Critical Individual
Priority to DED37671A priority patent/DE1228399B/en
Priority to GB35300/62A priority patent/GB967411A/en
Priority to FR918466A priority patent/FR1345288A/en
Priority to CH1468262A priority patent/CH404948A/en
Publication of DE1228399B publication Critical patent/DE1228399B/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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed 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
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • 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
    • B29C48/25—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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/14—Twisting
    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
    • B29C55/26—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes biaxial
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/085—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using gamma-ray
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
    • B29C2035/0872—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation using ion-radiation, e.g. alpha-rays
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
    • B29C2035/0877—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation using electron radiation, e.g. beta-rays
    • 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
    • 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
    • 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • 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
    • B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
    • B29K2301/10—Thermosetting resins

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

Verfahren zur Herstellung von Kunststoff-Hohlkörpern, wie Rohren od. dgl.Process for the production of plastic hollow bodies, such as pipes od. like

Die Erfindung betrifft ein Verfahren zum Herstellen von Kunststoff-Hohlkörpern, wie Rohren, Rohren mit inneren statischen Versteifungselementen od. dgl., bei welchem der Hohlkörper durch Auspressen aus einer Düse geformt, anschließend aufgeweitet, in Längsrichtung gereckt, kalibriert und durch Kühlen verfestigt wird. The invention relates to a method for producing plastic hollow bodies, such as pipes, pipes with internal static stiffening elements or the like, in which the hollow body is formed by pressing out of a nozzle, then expanded, is stretched in the longitudinal direction, calibrated and solidified by cooling.

Es ist bekannt, daß Rohre, Profilstangen oder dergleichen Hohlkörper aus Metallen erhebliche Nachteile besitzen, z. B. daß Stahlrohre sehr leicht rosten, gegen Wasser und Witterungseinflüsse sehr empfindlich sind und mit verhältnismäßig teuren Mitteln korrosions- und wetterfest gemacht werden müssen. Solche Mittel sind naturgemäß aber nur eine verhältnismäßig kurze Zeit wirksam, deren Korrosionsmittelaufbringung verhältnismäßig teuer und erfordern außerdem eine laufende Wartung. Dies trifft auch mehr oder weniger bei anderen Metallen zu, die dann allerdings noch erheblich teurer sind. It is known that pipes, profile bars or the like are hollow bodies made of metals have considerable disadvantages, e.g. B. that steel pipes rust very easily, are very sensitive to water and weather conditions and with relative expensive means must be made corrosion and weatherproof. Such means are but naturally only effective for a relatively short time, the application of the corrosion agent relatively expensive and also require ongoing maintenance. This is true also more or less with other metals, which then, however, still considerably are more expensive.

Hinzu kommt der Nachteil des hohen Gewichtes und daß Profilrohre verhältnismäßig schwierig in der Herstellung sind und sehr teurer Fertigungsmittel bedürfen.In addition, there is the disadvantage of high weight and that profile tubes are proportionate are difficult to manufacture and require very expensive manufacturing equipment.

Rohre aus Kunststoffen, vorzugsweise thermo plastischen Kunststoffen, haben trotz zusätzlicher Profilierung bisher bei gleichen Abmessungen im Verhältnis zu Metallrohren nicht genügend Stabilität, so daß deren Verwendung sich in der Praxis nur zum geringen Teil hat durchsetzen können. Pipes made of plastics, preferably thermoplastics, have so far with the same dimensions in relation to each other despite additional profiling too metal pipes do not have enough stability, so that their use is in practice only to a small extent was able to prevail.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, durch welches Kunststoff-Hohlkörper während des Herstellungsprozesses so behandelt werden, daß eine bisher nicht erzielte Festigkeit erreicht wird. Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß der Hohlkörper nach einer maßhaltigen Kalibrierung unter Vakuum und/oder Innendruck durch abschließende Behandlung mit Alpha- und/oder Beta- und/oder Gammastrahlen innerhalb einer Hohlkammer weiterverfestigt wird. The invention is based on the object of creating a method by which plastic hollow body is treated in this way during the manufacturing process that a previously unattained strength is achieved. This job is solved according to the invention in that the hollow body after a dimensionally accurate calibration under vacuum and / or internal pressure by final treatment with alpha and / or Beta and / or gamma rays are further solidified within a hollow chamber.

Durch den Dehn- und Streckvorgang wird eine Molekülverlagerung vorgenommen, der die Molekeule in eine Richtung, und zwar in die Dehnrichtung, bringt, wobei die Moleküle sich ineinander verketten, wodurch sich eine vielfache Zugfestigkeit des thermoplastischen Kunststoffes ergibt. Infolge sowohl der Dehnung als auch der Streckung und der dadurch hervorgerufenen Ineinanderkettung der Moleküle wird das Rohrprofil in seiner Gesamtheit wesentlich verfestigt und außer der Biegefestigkeit auch die Reißfestigkeit erheblich heraufgesetzt, wobei durch Anwendung von überwiegender Dehnung oder um- gekehrt der Streckung verschiedene Eigenschaften der Biegung und Reißfestigkeit in Beziehung zueinander gebracht werden können. Durch die nachfolgende Behandlung des fertiggeformten verfestigten Rohres mit Alpha- und/oder Beta- und/oder Gamma-Strahlen wird das Molekulargefüge und durch Atomverlagerungen die Gesamtstruktur beeinflußt, wodurch eine zusätzliche Netzverfiechtung der Moleküle eine weit höhere mechanische Festigkeit und eine ebenfalls erheblich höhere thermische Belastbarkeit sowie Standfestigkeit erzielt wird. Molecules are shifted through the stretching and stretching process, which brings the molecular lobe in one direction, namely in the stretching direction, where the molecules are linked together, creating a multiple tensile strength of the thermoplastic resin results. As a result of both stretching and This will be the stretching and the resulting chaining of the molecules Tubular profile in its entirety substantially strengthened and apart from the flexural strength also the tear resistance is increased considerably, whereby by the use of predominant Stretching or reversed the various properties of curvature and elongation Tear strength can be related to each other. Through the following Treatment of the finished solidified pipe with alpha and / or beta and / or Gamma rays become the molecular structure and, through the displacement of atoms, the overall structure influenced, whereby an additional Netzverfiechtung the molecules a far higher mechanical strength and also a considerably higher thermal load capacity and stability is achieved.

Erfindungsgemäß kann das Verfahren weiterhin so ausgebildet sein, daß das die Düse verlassende plastische Material bei der Streckung und/oder radialen Dehnung zusätzlich einen einseitigen und/ oder doppelseitigen Drall erhält. Dadurch wird eine zusätzliche Stabilisierung in Querrichtung erreicht, wodurch z. B. federnde Eigenschaften nach einer Richtung und versteifende Eigenschaften in der entgegengesetzten Richtung erzeugt werden. According to the invention, the method can furthermore be designed in such a way that that the plastic material leaving the nozzle during stretching and / or radial Expansion also receives a one-sided and / or double-sided twist. Through this additional stabilization in the transverse direction is achieved, whereby z. B. resilient Properties in one direction and stiffening properties in the opposite direction Direction can be generated.

Weiterhin kann in den axial verlaufenden Versteifungselementen durch entsprechende Formgebung der Düse mehr Material als in der Außenzone angelagert werden. Dadurch bilden die Radialversteifungen in axialer Richtung eine Schlangenlinie, wodurch eine zusätzliche Versteifung erzielt wird. Furthermore, in the axially extending stiffening elements through Appropriate shaping of the nozzle more material than deposited in the outer zone will. As a result, the radial stiffeners form a serpentine line in the axial direction, whereby an additional stiffening is achieved.

Das Material kann zusätzlich einer Nieder- oder Hochfrequenzbehandlung mit Wechsel- oder pulsierendem Gleichstrom unterworfen werden. Dadurch können zusätzlich bestimmte Eigenschaften hinzugefügt werden, z. B. erhöhter oder verringerter elektrischer Widerstand oder eine andere magnetische Eigenschaft oder auch je nach Richtung eine höhere Reißfestigkeit bzw. nach der anderen Richtung niedrigere Elastizität, oder umgekehrt. The material can also undergo a low or high frequency treatment be subjected to alternating or pulsating direct current. This allows additional certain properties are added, e.g. B. increased or decreased electrical Resistance or another magnetic property or, depending on the direction, one higher tensile strength or lower elasticity in the other direction, or vice versa.

In der Zeichnung sind einige Ausführungsformen der Versteifungselemente und die Apparatur für den Verfahrensablauf dargestellt. Es zeigen Fig. 1, 2 und 3 verschiedene Formen der Versteifungselemente der Formkörper in Seitenansicht, Fig. 4 die Verfahrensapparatur in schematischem Aufbau und Fig. 5 und 6 eine weitere Ausführungsform eines Hohlkörpers im Querschnitt bzw. Längsschnitt. In the drawing are some embodiments of the stiffening elements and the apparatus for the process sequence is shown. Show it Fig. 1, 2 and 3 different shapes of the stiffening elements of the molded body in side view, 4 shows the process apparatus in a schematic structure and FIGS. 5 and 6 show a further one Embodiment of a hollow body in cross section or longitudinal section.

Im Innenraum der Hohlkörper 1 sind Versteifungselemente 2 angeordnet. In F i g. 4 ist mit 3 die Düse der Strangpreßmaschine und mit 4 eine Vakuum durchlaufdüse bezeichnet,. welche mehrere Abteile a bis f enthält, die die verschiedenen Kälte- und Wärmezonen darstellen. Die Düse 4 ist mit einem Verbindungsrohr 6 zum Vakuumgerät versehen. Mit 5 ist eine einen Strahler 7 enthaltende Hohlkammer bezeichnet. Stiffening elements 2 are arranged in the interior of the hollow body 1. In Fig. 4 is with 3 the nozzle of the extrusion machine and with 4 a vacuum flow nozzle designated,. which contains several compartments a to f, which contain the various refrigeration and represent heat zones. The nozzle 4 is connected to a connecting pipe 6 to the vacuum device Mistake. 5 with a hollow chamber containing a radiator 7 is designated.

Bei der in den Fig. 5 und 6 dargestellten Ausführungsform bestehen die Versteifungselemente aus zylindrischen H6hlkörpern 9, in welche in Längsrichtung Drähte 8 eingebettet sind, vorzugsweise unter Spannung. Dadurch wird eine außerordentlich große Biegefestigkeit und Elastizität erreicht. In the embodiment shown in FIGS. 5 and 6 exist the stiffening elements made of cylindrical hollow bodies 9, in which in the longitudinal direction Wires 8 are embedded, preferably under tension. This makes one extraordinary great flexural strength and elasticity achieved.

Claims (3)

Patentansprüche: 1. Verfahren zum Herstellen von Kunststoff-Hohlkörpern, wie Rohren, Rohren mit inneren statischen Versteifungselementen od. dgl., bei welchem der Hohlkörper durch Auspressen aus einer Düse geformt, anschließend aufgeweitet, in Längsrichtung gereckt, kalibriert und durch Kühlen verfestigt wird, dadurch gekennz e i c h n e t, daß der Hohlkörper nach einer maßhaltigen Kalibrierung unter Vakuum und/ oder Innendruck durch abschließende Behandlung mit Alpha- und/oder Beta- und/oder Gamma-Strahlen innerhalb einer Hohlkammer (5) weiterverfestigt wird. Claims: 1. A method for producing hollow plastic bodies, like pipes, pipes with inner Static stiffening elements or the like. In which the hollow body is formed by pressing out of a nozzle, then expanded, is stretched in the longitudinal direction, calibrated and solidified by cooling, thereby marked e i c h n e t that the hollow body after a dimensionally accurate calibration under vacuum and / or internal pressure through final treatment with alpha and / or beta and / or Gamma rays within a hollow chamber (5) is further solidified. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das die Düse verlassende plastische Material bei der Streckung und/oder radialen Dehnung zusätzlich einen einseitigen und/oder doppelseitigen Drall erhält. 2. The method according to claim 1, characterized in that the the Plastic material exiting the nozzle during stretching and / or radial expansion additionally receives a one-sided and / or double-sided twist. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in den axial verlaufenden Versteifungselementen durch entsprechende Formgebung der Düse mehr Material als in der Außenzone angelagert wird. 3. The method according to claim 1 or 2, characterized in that in the axially extending stiffening elements by appropriate shaping of the Nozzle more material than is deposited in the outer zone. In Betracht gezogene Druckschriften: Deutsche Auslegeschrift Nr. 1061484; schweizerische Patentschrift Nr. 286 948. Documents considered: German Auslegeschrift No. 1061484; Swiss patent specification No. 286 948.
DED37671A 1961-12-14 1961-12-14 Process for the production of hollow plastic bodies, such as pipes or the like. Pending DE1228399B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL286641D NL286641A (en) 1961-12-14
DED37671A DE1228399B (en) 1961-12-14 1961-12-14 Process for the production of hollow plastic bodies, such as pipes or the like.
GB35300/62A GB967411A (en) 1961-12-14 1962-09-17 Method for production of elongated hollow bodies containing one or more internal webs
FR918466A FR1345288A (en) 1961-12-14 1962-12-13 Process for manufacturing tubes, profiled bars or the like hollow parts, preferably of thermoplastic plastics
CH1468262A CH404948A (en) 1961-12-14 1962-12-14 Process for the production of hollow bodies, preferably from thermoplastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED37671A DE1228399B (en) 1961-12-14 1961-12-14 Process for the production of hollow plastic bodies, such as pipes or the like.

Publications (1)

Publication Number Publication Date
DE1228399B true DE1228399B (en) 1966-11-10

Family

ID=7043708

Family Applications (1)

Application Number Title Priority Date Filing Date
DED37671A Pending DE1228399B (en) 1961-12-14 1961-12-14 Process for the production of hollow plastic bodies, such as pipes or the like.

Country Status (5)

Country Link
CH (1) CH404948A (en)
DE (1) DE1228399B (en)
FR (1) FR1345288A (en)
GB (1) GB967411A (en)
NL (1) NL286641A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935357A (en) * 1973-03-27 1976-01-27 I. S. A. P. S.P.A. Hollow extruded plastic strips for packings
US4168944A (en) * 1976-08-24 1979-09-25 Ngk Spark Plug Co., Ltd. Apparatus for manufacturing a tubular honeycomb assembly with an adiabatic layer formed integrally on the peripheral wall

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572100A (en) * 1977-06-10 1980-07-23 Hepworth Iron Co Ltd Plastics pipe couplings
ATE44356T1 (en) * 1984-04-19 1989-07-15 Roehm Gmbh EXTRUDED WEB MULTIPLE SHEET WITH CORRUGATED BARS, AND METHOD AND APPARATUS FOR PRODUCTION THEREOF.
GB8527300D0 (en) * 1985-11-06 1985-12-11 Victaulic Plc Extrusion of products
DE202012102615U1 (en) 2012-02-08 2012-08-21 Manfred Binder Adjustable calibration sleeve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH286948A (en) * 1950-12-02 1952-11-15 S A Unitubo Process for obtaining a plastic tube.
DE1061484B (en) * 1955-01-11 1959-07-16 Willy Ruesch Injection device for the production of multiple cardiac catheters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH286948A (en) * 1950-12-02 1952-11-15 S A Unitubo Process for obtaining a plastic tube.
DE1061484B (en) * 1955-01-11 1959-07-16 Willy Ruesch Injection device for the production of multiple cardiac catheters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935357A (en) * 1973-03-27 1976-01-27 I. S. A. P. S.P.A. Hollow extruded plastic strips for packings
US4168944A (en) * 1976-08-24 1979-09-25 Ngk Spark Plug Co., Ltd. Apparatus for manufacturing a tubular honeycomb assembly with an adiabatic layer formed integrally on the peripheral wall

Also Published As

Publication number Publication date
FR1345288A (en) 1963-12-06
GB967411A (en) 1964-08-19
CH404948A (en) 1965-12-31
NL286641A (en) 1900-01-01

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