DE2112835A1 - Thermoplastic flexible corrugated tube - with thermoplastic flanges heat sealed on in blow moulding process - Google Patents

Thermoplastic flexible corrugated tube - with thermoplastic flanges heat sealed on in blow moulding process

Info

Publication number
DE2112835A1
DE2112835A1 DE19712112835 DE2112835A DE2112835A1 DE 2112835 A1 DE2112835 A1 DE 2112835A1 DE 19712112835 DE19712112835 DE 19712112835 DE 2112835 A DE2112835 A DE 2112835A DE 2112835 A1 DE2112835 A1 DE 2112835A1
Authority
DE
Germany
Prior art keywords
flanges
blow mold
corrugated pipe
thermoplastic
blow
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
DE19712112835
Other languages
German (de)
Inventor
Hermann Brune
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.)
STREUBER SULO EISENWERK F
Sulo Umwelttechnik GmbH
Original Assignee
STREUBER SULO EISENWERK F
Sulo Eisenwerk Streuber and Lohmann GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by STREUBER SULO EISENWERK F, Sulo Eisenwerk Streuber and Lohmann GmbH filed Critical STREUBER SULO EISENWERK F
Priority to DE19712112835 priority Critical patent/DE2112835A1/en
Publication of DE2112835A1 publication Critical patent/DE2112835A1/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/18—Pleated or corrugated hoses
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • B29C49/04116—Extrusion blow-moulding characterised by the die
    • 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
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • 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
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2021—Inserts characterised by the material or type
    • B29C2049/2026—Neck portions
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • 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)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

The prefabricated flanges of similar plastic reinforced with metal discs are pre-warmed then positioned in the blow-mould which is then closed and the tube blank pushed through the flanges into the mould and the blank then blown into the corrugated tube shape, simultaneously sealing on the flanges by pressure and heat.

Description

Verfahren zur Herstellung eines flexiblen Wellrohres mit Flanschen mit Flanschen Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines flexiblen Wellrohres mit Flanschen. Process for the production of a flexible corrugated pipe with flanges with flanges The present invention relates to a method of manufacturing a flexible corrugated pipe with flanges.

Es ist bekannt, Rohre, die im Blasverfahren aus thermoplastischem Kunststoff hergestellt und über einen Teilbereich ihrer Länge als flexibles Wellrohr ausgebildet sind, mit aus gleichem Kunststoff hergestellten Flanschen derart zu verbinden, daß man anschließend an die getrennte Herstellung von Rohr und Flanschen in einem besonderen Arbeitsgang diese miteinander verschraubt oder verschweißt.It is known, pipes that are blown from thermoplastic Made of plastic and over part of its length as a flexible corrugated pipe are designed with flanges made of the same plastic in such a way connect that one then follows the separate manufacture of pipe and flanges In a special operation, these are screwed or welded together.

Dieses Herstellungsverfahren ist wegen der zusätzlich erf orderlichen Schweißvorrichtung bzw. der Ausformung von Gewinde an den Wellrohrenden und in der Bohrung der Flanschen kompliziert und kostenaufwendig.This manufacturing process is required because of the additional Welding device or the formation of threads on the corrugated pipe ends and in the Boring the flanges is complicated and expensive.

Die vorliegende Erfindung hat zum Gegenstand ein Verfahren zur Herstellung eines flexiblen Wellrohres mit Flanschen, das die obenbenannten Nachteile nicht aufweist.The subject of the present invention is a method of manufacture a flexible corrugated pipe with flanges that does not have the disadvantages mentioned above having.

Erfindungsgemäß wird das Wellrohr mit Flanschen aus einem thermoplastischen Kunststoff nach dem Blasverfahren wie nachfolgend beschrieben hergestellt. Die in einem besonderen Werkzeug hergestellten und vorteilhaft auf ihrer rückwärtigen Seite mit aufgelegten Metallscheiben ausgesteiften Flanschen werden in die eine Hälfte einer zweigeteilten und geöffneten für die Ausformung des Wellrohres hergerichteten Blasform vorgewärmt eingelegt, die Blasform geschlossen und aus der über derselben stehenden Ringdüse durch die Flanschen hindurch ein entsprechend enger schlauchförmiger Vorformling in die Blasform bis über die von unten in dieselbe einmündende Blasdüse ausgestoßen, der Vorformling durch Schließen der an den Stirnseiten der Blasform angeordneten Abquetschschieber oben und unten unter Einschluß der Blasdüse verschlossen und dieser dann mit entsprechend starkem Druck zum Wellrohr aufgeblasen. Durch den Blasdruck und die Blaswärme wird gleichzeitig das Wellrohr flüssigkeitsdicht mit den Flanschen verschweißt. Nach dem Ablassen des Druckmittels und nach Abkühlen wird die Blasform geöffnet, das Wellrohr aus derselben entnommen und anschließend die an den Flanschen überstehenden verlorenen Blasköpfe abgeschnitten.According to the invention, the corrugated pipe with flanges is made of a thermoplastic Plastic produced by the blow molding process as described below. In the a special tool made and advantageous on its rear side Flanges stiffened with placed metal disks are in one half a two-part and opened one prepared for the shaping of the corrugated pipe Blow mold inserted preheated, the blow mold closed and out of the above standing ring nozzle through the flanges through a correspondingly narrow hose-shaped Preform into the blow mold up to the blow nozzle opening into the same from below ejected the preform by closing the at the end faces of the blow mold arranged squeeze slide closed at the top and bottom, including the blower nozzle and this is then inflated to the corrugated pipe with a correspondingly strong pressure. Through the The blowing pressure and the blowing heat make the corrugated pipe liquid-tight at the same time welded to the flanges. After releasing the pressure medium and after cooling down the blow mold is opened, the corrugated pipe is removed from it and then cut off the lost blow heads protruding from the flanges.

Eine zur Ausführung des Verfahrens geeignete Vorrichtung wird anhand der Zeichnung erläutert.A device suitable for carrying out the method is shown on the basis of the drawing explained.

Fig. 1 und 2 veranschaulichen die Herstellung eines flexiblen Wellrohres mit Flanschen aus thermopiastischem Kunststoff nach dem Blasverfahren unter Dehnung eines engen schlauchförmigen Vorformlings auf Wellrohrweite.1 and 2 illustrate the manufacture of a flexible corrugated pipe with flanges made of thermoplastic plastic after the blow molding process with expansion of a narrow tubular preform to the width of a corrugated pipe.

In Fig. 1 sind die zwei Teile der Blasform 1,2 im Längsschnitt in geschlossenem und die an dessen Stirnseiten angeordneten Abquetschschieber 3,4 in geöffnetem Zustand dargestellt. Oben und unten sind in die Teile 1,2 der Blasform in eingearbeitete Formnester die aus thermoplastischem Kunststoff vorgefertigten im Schnitt dargestellten Flanschen 5, die auf ihrer rückwärtigen Seite mit aufgelegten Metallscheiben 6 ausgesteift sind, eingelegt und darin mit bekannten aber nicht dargestellten Mitteln festgehalten. Aus dem Spritzkopf 7, der als Ringdüse ausgebildet ist, wird der schlauchförmige Vorformling 8 durch die in die Form eingelegten Flanschen 5 bis über die in die unteren Abquetschschieber 3,4 eingreifende Blasdüse 9 ausgestoßen.In Fig. 1, the two parts of the blow mold 1, 2 are in longitudinal section in closed and the pinch slide 3.4 in shown in the open state. Above and below are parts 1, 2 of the blow mold in built-in mold cavities which are prefabricated from thermoplastic material flanges 5 shown in section, which are placed on their rear side with Metal disks 6 are stiffened, inserted and therein with known but not funds shown. From the spray head 7, which is designed as an annular nozzle is, the tubular preform 8 is inserted into the mold by the flanges 5 ejected through the blow nozzle 9 engaging in the lower squeeze slide 3, 4.

In Fig. 2 ist das fertig gebildete Wellrohr 10 mit den Flanschen 5 flüssigkeitsdicht verschweißt im Schnitt dargestellt zu ersehen.In FIG. 2, the finished corrugated pipe 10 with the flanges 5 is shown Welded liquid-tight, shown in section.

Die Vorrichtung ist hier im Zustand kurz vor der Öffnung der Blasform und der Abquetschschieber gezeigt. 11 sind die von dem Vorformling oben und unten abgequetschten Teile und 12 die verlorenen Köpfe, die über die Flanschen 5 vorstehen, und die nach der Entnahme des Wellrohres aus der Blasform abgeschnitten werden.The device is here in the state shortly before the opening of the blow mold and the squeeze slide shown. 11 are those of the preform above and below pinched off parts and 12 the lost heads protruding from the flanges 5, and which are cut off after the corrugated pipe has been removed from the blow mold.

Claims (1)

Patentanspruch Claim Verfahren zur Herstellung eines Wellrohres mit Flanschen aus thermoplastischem Kunststoff im Blasverfahren, nach dem ein im Strangpressverfahren aus einer Ringdüse in eine zweigeteilt, an den Stirnseiten mit Abquetschschiebern versehene Blasform ausgestoßener schlauchförmiger Vorformling nach dem Schließen der Blasform und Abquetschschieber im seine endgültige Gestalt des Wellrohres aufgeblasen wird, dadurch gekennzeichnet, daß man aus gleichem Kunststoff vorgefertigte Flanschen (5), die vorteilhaft auf der rückwärtigen Seite durch aufgelegte Metallscheiben (6) ausgesteift sind, vorgewärmt in die eine Hälfte der geöffneten Blasform (1,2) einlegt, daß man die Blasformhälften (1,2) schließt, daß man den Vorformling (8) durch die Flanschen (5) hindurch in die Blasform (1,2) ausstößt, daß man den Vorformling (8) durch Schließen der Abquetschschieber (3,4) oben und unten verschließt und daß man dann nit entsprechend starkem Druck den Vorformling (8) zum Wellrohr (lo) aufbläst und diesen gleichzeitig durch den Blasdruck und die Blaswärme flüssigkeitsdicht mit den Flanschen (5) verschweißt, woraufhin man nach dem Ablassen des Druckmittels und Abkühlen des Wellro,hres (io) die Blasform (1,2) und Abquetschschieber (3,4) öffnet, das Wellrohr (lo) aus der Blasform (1,2) nimmt und die verlorenen Blasköpfe (12) abschneidet. Leerseite teProcess for the production of a corrugated pipe with flanges made of thermoplastic Plastic in the blow molding process, after which an extrusion process from a ring nozzle into a two-part blow mold with squeeze slides on the front sides ejected tubular preform after closing the blow mold and squeeze slide in its final shape of the corrugated pipe is inflated, characterized in that that one made of the same plastic prefabricated flanges (5), which are advantageous on the rear side are stiffened by placed metal washers (6), preheated into one half of the open blow mold (1,2) that you insert the blow mold halves (1,2) concludes that the preform (8) through the flanges (5) in the blow mold (1,2) ejects that the preform (8) by closing the squeeze slide (3, 4) closes at the top and bottom and that one then does not apply a correspondingly strong pressure the preform (8) to the corrugated pipe (lo) inflates and this at the same time through the The blowing pressure and the blowing heat are welded to the flanges (5) in a liquid-tight manner, whereupon after releasing the pressure medium and cooling the corrugated tube, hres (io) the blow mold (1,2) and squeeze slide (3,4) open, the corrugated pipe (lo) from the Blow mold (1,2) takes and cuts off the lost blow heads (12). Blank page te
DE19712112835 1971-03-17 1971-03-17 Thermoplastic flexible corrugated tube - with thermoplastic flanges heat sealed on in blow moulding process Pending DE2112835A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712112835 DE2112835A1 (en) 1971-03-17 1971-03-17 Thermoplastic flexible corrugated tube - with thermoplastic flanges heat sealed on in blow moulding process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712112835 DE2112835A1 (en) 1971-03-17 1971-03-17 Thermoplastic flexible corrugated tube - with thermoplastic flanges heat sealed on in blow moulding process

Publications (1)

Publication Number Publication Date
DE2112835A1 true DE2112835A1 (en) 1972-09-28

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2564911A1 (en) * 1984-05-25 1985-11-29 Skf Cie Ste Financiere Immobil Assembly comprising a composite tubular element and a tapped metal end piece for connection.
EP0323548A1 (en) * 1987-12-18 1989-07-12 Sotralentz S.A. Method for producing a plastic container by blow moulding, and device for carrying out this method
US5601776A (en) * 1993-11-02 1997-02-11 Uponor Innovation Ab Method and a mould for forming an expansion, such as a socket, in a pipe, and a plastic pipe
US8052915B2 (en) 2006-11-10 2011-11-08 GM Global Technology Operations LLC Apparatus for forming an extrusion blow molded vessel with insert and method
WO2014078259A1 (en) * 2012-11-16 2014-05-22 Illinois Tool Works Inc. Method for producing a blow moulded fuel filler system for a motor vehicle and fuel filler system for a motor vehicle
EP2159035A3 (en) * 2008-08-21 2014-06-04 Röchling Automotive AG & Co. KG Method and device for manufacturing blown hollow plastic bodies with at least one reinforcement element
US8747718B2 (en) 2008-11-27 2014-06-10 Mann+Hummel Gmbh Plastic hollow part and method for the manufacture thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2564911A1 (en) * 1984-05-25 1985-11-29 Skf Cie Ste Financiere Immobil Assembly comprising a composite tubular element and a tapped metal end piece for connection.
EP0323548A1 (en) * 1987-12-18 1989-07-12 Sotralentz S.A. Method for producing a plastic container by blow moulding, and device for carrying out this method
US5601776A (en) * 1993-11-02 1997-02-11 Uponor Innovation Ab Method and a mould for forming an expansion, such as a socket, in a pipe, and a plastic pipe
US8052915B2 (en) 2006-11-10 2011-11-08 GM Global Technology Operations LLC Apparatus for forming an extrusion blow molded vessel with insert and method
DE102007053098B4 (en) 2006-11-10 2018-07-12 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Apparatus for manufacturing a vessel with use by extrusion blow molding
EP2159035A3 (en) * 2008-08-21 2014-06-04 Röchling Automotive AG & Co. KG Method and device for manufacturing blown hollow plastic bodies with at least one reinforcement element
US8747718B2 (en) 2008-11-27 2014-06-10 Mann+Hummel Gmbh Plastic hollow part and method for the manufacture thereof
WO2014078259A1 (en) * 2012-11-16 2014-05-22 Illinois Tool Works Inc. Method for producing a blow moulded fuel filler system for a motor vehicle and fuel filler system for a motor vehicle

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