DE3631691A1 - Process of continuous pressure vulcanisation of tubes produced without a mandrel - Google Patents

Process of continuous pressure vulcanisation of tubes produced without a mandrel

Info

Publication number
DE3631691A1
DE3631691A1 DE19863631691 DE3631691A DE3631691A1 DE 3631691 A1 DE3631691 A1 DE 3631691A1 DE 19863631691 DE19863631691 DE 19863631691 DE 3631691 A DE3631691 A DE 3631691A DE 3631691 A1 DE3631691 A1 DE 3631691A1
Authority
DE
Germany
Prior art keywords
pressure
mandrel
hose
vulcanisation
vulcanization
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.)
Granted
Application number
DE19863631691
Other languages
German (de)
Other versions
DE3631691C2 (en
Inventor
Hans-Werner Dipl In Friederich
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.)
Phoenix AG
Original Assignee
Phoenix 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 Phoenix AG filed Critical Phoenix AG
Priority to DE19863631691 priority Critical patent/DE3631691A1/en
Publication of DE3631691A1 publication Critical patent/DE3631691A1/en
Application granted granted Critical
Publication of DE3631691C2 publication Critical patent/DE3631691C2/de
Granted 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
    • B29D23/001—Pipes; Pipe joints
    • 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
    • B29C35/0227—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using pressure vessels, e.g. autoclaves, vulcanising pans
    • 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
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/06—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam for articles of indefinite length
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

The invention relates to a process for continuous tube production without the use of a mandrel, comprising the following process steps: a) the inner layer (core) is produced on an extruder; b) the tube core runs through a cooling zone; c) the reinforcement is applied on one or more building-up machines; d) the outer layer (cover) is applied on an extruder; e) subsequently, the tube is vulcanised under pressure. What is essential about this invention is that the process steps b and c take place in a pressure chamber, the internal pressure of the pressure chamber corresponding to the vulcanisation pressure.

Description

Die Erfindung betrifft ein Verfahren zur kontinuierlichen Schlauchfertigung gemäß dem Oberbegriff des Anspruchs.The invention relates to a method for continuous Hose production according to the preamble of the claim.

Bei der Fertigung von Dornschläuchen (flexibler Dorn) ist eine kontinuierliche Druckvulkanisation bekannt. Bei einer Druckvulkanisation (DE-PS 27 50 641) ist es jedoch notwendig, daß ein entsprechender Gegendruck vorhanden ist. Dieser Gegendruck wird bei der Schlauchherstellung durch einen Innendorn erreicht.When manufacturing mandrel hoses (flexible mandrel) continuous pressure vulcanization is known. At a Pressure vulcanization (DE-PS 27 50 641), however, it is necessary that there is a corresponding back pressure. This Back pressure is generated by a hose Internal mandrel reached.

Schwierig wird es jedoch, wenn ein dornlos gefertigter Textilschlauch in einer kontinuierlichen Anlage unter Druck vulkanisiert werden soll. Bei dieser Vulkanisationsart würde der Schlauch ohne entsprechenden Gegendruck flach werden. Beaufschlagt man den Schlauch jedoch mit einem entsprechenden Gegendruck, bekommt man an den davor liegenden Fertigungseinrichtungen Schwierigkeiten. Würde man den Schlauchrohling mit einem Innengegendruck versehen, würde die Seele zwischen Spritzmaschine und Konfektionsmaschine aufblähen. Eine maßhaltige Fertigung wäre dann nicht möglich.However, it becomes difficult when a thornlessly manufactured one Textile hose in a continuous system under pressure to be vulcanized. With this type of vulcanization the hose will become flat without adequate back pressure. However, if you apply a corresponding amount to the hose Back pressure, you get on the one in front Manufacturing facilities difficulties. Would you Hose blank with an internal counter pressure, would the soul between injection molding machine and assembly machine inflate. A dimensionally accurate production would not be then possible.

Aus diesem Grunde sind bisher dornlos gefertigte Schläuche drucklos nach dem UHF-, Salzbad- oder Ballottini-/Fluid-Bed- Verfahren vulkanisiert worden. For this reason hoses are manufactured without a thorn pressureless after the UHF, salt bath or ballottini / fluid bed Process has been vulcanized.  

Diese Schläuche haben jedoch vom äußeren Eindruck und von den Trennfestigkeiten (Lagenbindung) kein hohes Qualitätsniveau. Bei der UHF-Vulkanisation kommt hinzu, daß nur schwarze Mischungen und speziell auf die UHF-Vulkanisation eingestellte Mischungen hierfür geeignet sind.However, these hoses have an external impression and that Separation strengths (layer binding) not a high quality level. In addition, with UHF vulcanization, only black Mixtures and specially adjusted for UHF vulcanization Mixtures are suitable for this.

Aufgabe der Erfindung ist es daher, die Verfahrensschritte a bis e so weiter zu entwickeln, daß auch für dornlos gefertigte Schläuche eine Druckvulkanisation möglich ist. Die Lösung dieser Aufgabe besteht in dem kennzeichnenden Merkmal des einzigen Anspruchs.The object of the invention is therefore to develop process steps a to e so that pressure vulcanization is also possible for mandrel-free hoses. The solution to this problem consists in the characteristic feature of the only claim.

Die Erfindung geht davon aus, daß ein Aufblähen der Seele nur dann möglich ist, wenn eine Druckdifferenz zwischen dem Innendruck und dem äußeren Druck besteht. Da für eine kontinuierliche Vulkanisation ein Innendruck benötigt wird, ist es also notwendig, den gleichen Druck außen auf die Seele wirken zu lassen. Dazu muß der empfindliche Teil der kontinuierlichen Schlauchfertigung mit einer Druckkammer umbaut werden.The invention assumes that an inflation of the soul is only possible if there is a pressure difference between the There is internal pressure and external pressure. There for one continuous vulcanization an internal pressure is needed So it is necessary to put the same pressure on the outside To let the soul work. To do this, the sensitive part of the continuous hose production with a pressure chamber be rebuilt.

Versuche haben ergeben, daß die Seele mit Festigkeitsträger eine gewisse Druckstabilität auch in unvulkanisiertem Zustand aufweist. Eine ummantelte Seele mit Festigkeitsträger ⌀ 13 mm, Wanddicke 1,2 mm, hält einen Innendruck ohne Verformungen von 3 bis 4 bar aus. Eine totale Zerstörung durch Bersten findet erst bei 14 bar statt. Es ist also nur notwendig, den Druck­ ausgleich für die nichtummantelte Seele zu schaffen. Sollte ein höherer Druck erforderlich sein, kann die Druckkammer entsprechend geweitert werden. Die Druckfestigkeit einer mit Festigkeitsträger ummantelten Seele richtet sich natürlich nach Durchmesser, Wanddicke und Mischung. Hier können Unterschiede in der Druckfestigkeit auftreten. Tests have shown that the soul with reinforcements a certain pressure stability even in the uncured state having. A coated core with reinforcement sträger 13 mm, Wall thickness 1.2 mm, holds an internal pressure without deformation 3 to 4 bar. A total destruction by bursting takes place only at 14 bar. So it is only necessary to print to create balance for the uncovered soul. Should A higher pressure may be required in the pressure chamber be expanded accordingly. The compressive strength of a Strength-encased soul naturally aligns itself by diameter, wall thickness and mixture. Here you can Differences in compressive strength occur.  

Der Innendruck in der Druckkammer muß dem Vulkanisationsdruck entsprechen. Der Innendruck im Schlauchrohling kann geringfügig höher sein. Dies richtet sich jedoch auch nach Durchmesser und Wanddicke des Schlauches.The internal pressure in the pressure chamber must match the vulcanization pressure correspond. The internal pressure in the tube blank can be slight be higher. However, this also depends on the diameter and Wall thickness of the hose.

Mit dieser Maßnahme wäre eine kontinuierliche Vulkanisation in den bekannten Vulkanisationseinrichtungen möglich.With this measure, a continuous vulcanization would be in the known vulcanization devices possible.

Die einzige Abbildung beschreibt das erfindungsgemäße Verfahren skizzenhaft. Folgende Vorrichtungen werden benötigt:The only figure describes the method according to the invention sketchy. The following devices are required:

Spritzmaschine (1)
Kühleinrichtung (2)
Konfektionseinrichtung (3)
Spritzmaschine (4)
Druckkessel (5) zur Vulkanisation
Aufwickelvorrichtung (6) für den Schlauch (8)
Druckkammer (7)Spraying machine ( 1 )
Cooling device ( 2 )
Clothing device ( 3 )
Spraying machine ( 4 )
Pressure vessel ( 5 ) for vulcanization
Winding device ( 6 ) for the hose ( 8 )
Pressure chamber ( 7 )

Die Druckerzeugung in der Druckkammer (7) erfolgt z. B. durch Luftzufuhr.The pressure in the pressure chamber ( 7 ) z. B. by air supply.

Claims (1)

Verfahren zur kontinuierlichen Schlauchfertigung ohne Verwendung eines Dorns, bestehend aus folgenden Verfahrensschritten:
  • a) an einer Spritzmaschine wird die Innenschicht (Seele) hergestellt;
  • b) die Schlauchseele durchläuft eine Kühlstrecke;
  • c) an einer oder mehreren Konfektionsmaschinen wird der Festigkeitsträger aufgebracht;
  • d) an einer Spritzmaschine wird die Außenschicht (Decke) aufgebracht;
  • e) danach wird der Schlauch unter Druck vulkanisiert; dadurch gekennzeichnet, daß die Verfahrensschritte b und c in einer Druckkammer (7) erfolgen, wobei der Innendruck der Druckkammer (7) dem Vulkanisationsdruck entspricht.
Process for continuous hose production without using a mandrel, consisting of the following process steps:
  • a) the inner layer (core) is produced on a spraying machine;
  • b) the hose core passes through a cooling section;
  • c) the reinforcement is applied to one or more clothing machines;
  • d) the outer layer (ceiling) is applied to a spraying machine;
  • e) then the hose is vulcanized under pressure; characterized in that process steps b and c take place in a pressure chamber ( 7 ), the internal pressure of the pressure chamber ( 7 ) corresponding to the vulcanization pressure.
DE19863631691 1986-09-18 1986-09-18 Process of continuous pressure vulcanisation of tubes produced without a mandrel Granted DE3631691A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863631691 DE3631691A1 (en) 1986-09-18 1986-09-18 Process of continuous pressure vulcanisation of tubes produced without a mandrel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863631691 DE3631691A1 (en) 1986-09-18 1986-09-18 Process of continuous pressure vulcanisation of tubes produced without a mandrel

Publications (2)

Publication Number Publication Date
DE3631691A1 true DE3631691A1 (en) 1988-03-24
DE3631691C2 DE3631691C2 (en) 1992-07-09

Family

ID=6309801

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863631691 Granted DE3631691A1 (en) 1986-09-18 1986-09-18 Process of continuous pressure vulcanisation of tubes produced without a mandrel

Country Status (1)

Country Link
DE (1) DE3631691A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10320130A1 (en) * 2003-05-06 2004-11-25 Veritas Ag Method for producing hoses having at least one elastomeric material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10302884A1 (en) * 2003-01-25 2006-10-05 Contitech Luftfedersysteme Gmbh Curved tubular product, in particular a vehicle air spring, manufacture, involves pressure forming of tube with hot fluid against vulcanization tool wall

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750641C2 (en) * 1977-05-04 1986-08-07 I.V.G. Industria Veneta Gomma Colbachini S.p.A., Cervarese, Padua/Padova Elongated pressure vessel for the vulcanization of rubber products

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750641C2 (en) * 1977-05-04 1986-08-07 I.V.G. Industria Veneta Gomma Colbachini S.p.A., Cervarese, Padua/Padova Elongated pressure vessel for the vulcanization of rubber products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10320130A1 (en) * 2003-05-06 2004-11-25 Veritas Ag Method for producing hoses having at least one elastomeric material

Also Published As

Publication number Publication date
DE3631691C2 (en) 1992-07-09

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: B29D 23/22

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee