DE3713741A1 - Process for producing flexible tubes, in particular T-tubes and elbow tubes, from silicone rubber - Google Patents

Process for producing flexible tubes, in particular T-tubes and elbow tubes, from silicone rubber

Info

Publication number
DE3713741A1
DE3713741A1 DE19873713741 DE3713741A DE3713741A1 DE 3713741 A1 DE3713741 A1 DE 3713741A1 DE 19873713741 DE19873713741 DE 19873713741 DE 3713741 A DE3713741 A DE 3713741A DE 3713741 A1 DE3713741 A1 DE 3713741A1
Authority
DE
Germany
Prior art keywords
tubes
elbow
silicone rubber
mixture
producing flexible
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.)
Withdrawn
Application number
DE19873713741
Other languages
German (de)
Inventor
Sunil Dr Dixit
Friedrich Wilhelm Dr Graebner
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 DE19873713741 priority Critical patent/DE3713741A1/en
Publication of DE3713741A1 publication Critical patent/DE3713741A1/en
Withdrawn legal-status Critical Current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
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • 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
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/005—Hoses, i.e. flexible

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

The invention relates to a process for producing tubes, in particular T-tubes and elbow tubes, from silicone rubber. The essential feature of this process for producing tubes consists in the blank, mounted on a mandrel, being vulcanised in a salt bath at 210 to 240@C, the vulcanisation time being 4 to 8 minutes.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Schläuchen gemäß Oberbegriff des Anspruchs 1.The invention relates to a method for producing Hoses according to the preamble of claim 1.

Über das Verfahren der Herstellung derartiger Schläuche ist schon vielfach berichtet worden, wobei die folgenden Literaturzitate den Stand der Technik des Abdornens von Krümmerschläuchen aufzeigen sollen:About the process of making such hoses has been widely reported, the following Literature quotes the state of the art of thorning To show manifold hoses:

  • DE-PS 21 40 956
    DE-PS 27 37 277
    DE-PS 30 30 950
    DE-PS 30 30 951
    DE-PS 30 42 167
    DE-PS 31 07 778
    DE-PS 34 39 215    DE-PS 21 40 956
    DE-PS 27 37 277
    DE-PS 30 30 950
    DE-PS 30 30 951
    DE-PS 30 42 167
    DE-PS 31 07 778
    DE-PS 34 39 215

Der aufgedornte Rohling aus Silikonkautschuk wurde bisher im Dampfkessel vulkanisiert, wobei folgende Nachteile in Kauf genommen werden mußten:The thorned blank made of silicone rubber was previously vulcanized in the steam boiler, the following disadvantages in Had to be bought:

  • 1. Nicht ausgeheizte und klebrige Oberfläche wegen Inhibierung der Vulkanisation durch den im Kessel befindlichen Sauerstoff.1. Unheated and sticky surface because of inhibition of vulcanization the oxygen in the boiler.
  • 2. Lange Heizzeiten (20 bis 30 Minuten).2. Long heating times (20 to 30 minutes).
  • 3. Fleckige Oberfläche durch Bildung von Wasserkondensat an der Schlauchoberfläche.3. Stained surface due to the formation of Water condensate on the hose surface.

Aufgabe der Erfindung ist es daher, das Vulkanisationsverfahren so weiterzuentwickeln, daß diese Nachteile nicht auftreten. Diese Aufgabe wird gelöst durch das Kennzeichen des Anspruchs 1.The object of the invention is therefore the vulcanization process to develop so that these disadvantages do not occur. This object is achieved by the characterizing part of claim 1.

Das erfindungsgemäße Verfahren wird nun anhand eines Beispiels experimentiell beschrieben.The method according to the invention is now based on a Example experimentally described.

Ein Krümmerschlauch besteht aus der Seele, Verstärkungslage und Decke. Das Basispolymer für die Schlauchseele bzw. Schlauchdecke ist Methylvinylsiloxan mit sehr guter Standfestigkeit (Mooney ML 1 + 4 = 80 bis 100 bei 23°C), wobei als Vernetzungsmittel 2,4-Dichlorbenzolperoxid eingesetzt wird. Der so gefertigte Krümmerschlauch wird aufgedornt und im Salzbad vulkanisiert, u. z. nach den in den Ansprüchen 3 bis 5 angegebenen Bedingungen. Nach der Vulkanisation wird der Krümmerschlauch kurz in Wasser gekühlt und abgedornt. Dieser wird anschließend gewaschen und bei 170 bis 200°C getempert.A manifold consists of the soul, reinforcement layer and blanket. The base polymer for the tube core or Hose cover is methyl vinyl siloxane with very good Stability (Mooney ML 1 + 4 = 80 to 100 at 23 ° C), 2,4-dichlorobenzene peroxide as crosslinking agent is used. The elbow hose thus manufactured is thorned and vulcanized in a salt bath, u. e.g. after the in the claims 3 to 5 specified conditions. After The elbow hose is briefly vulcanized in water chilled and thorned. This is then washed and annealed at 170 to 200 ° C.

Die Vorteile des erfindungsgemäßen Verfahrens werden nun kurz aufgeführt.The advantages of the method according to the invention are now briefly listed.

  • 1. Verkürzung der Vulkanisationszeiten.1. Shortening the vulcanization times.
  • 2. Besseres Aussehen der Schlauchoberfläche.2. Better appearance of the hose surface.
  • 3. Verringerung der Ausschußquote.3. Reduction of the reject rate.
  • 4. Keine Verwendung von puderförmigen Materialien, womit eine größere Sauber­ keit der Betriebe verbunden ist.4. No use of powdery Materials, making a bigger clean linked to the factories.

Claims (5)

1. Verfahren zur Herstellung von Schläuchen, insbesondere von T- und Krümmerschläuchen, aus Silikonkautschuk, dadurch gekennzeichnet, daß der aufgedornte Rohling in einem Salzbad bei 210 bis 240°C vulkanisiert wird, wobei die Vulkanisationszeit 4 bis 8 Minuten beträgt.1. A process for the production of hoses, in particular T and elbow hoses, made of silicone rubber, characterized in that the thorned blank is vulcanized in a salt bath at 210 to 240 ° C, the vulcanization time being 4 to 8 minutes. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Salzbad aus einem Gemisch aus 45 bis 60 Gew.-% Kaliumnitrat, 5 bis 10 Gew.% Natriumnitrat und 30 bis 50 Gew.-% Natriumnitrit besteht, wobei der Schmelzpunkt des Gemisches 135 bis 150°C beträgt.2. The method according to claim 1, characterized in that the salt bath from a mixture of 45 to 60% by weight Potassium nitrate, 5 to 10% by weight sodium nitrate and 30 to 50 wt .-% sodium nitrite, the Melting point of the mixture is 135 to 150 ° C. 3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Salzbad aus einem Gemisch aus 53 Gew.-% Kaliumnitrat, 7 Gew.-% Natriumnitrat und 40 Gew.-% Natriumnitrit besteht, wobei der Schmelzpunkt des Gemisches 140°C beträt.3. The method according to claims 1 and 2, characterized characterized in that the salt bath from a mixture from 53% by weight potassium nitrate, 7% by weight sodium nitrate and 40% by weight sodium nitrite, the Melting point of the mixture is 140 ° C. 4. Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Vulkanisationstemperatur 225°C beträgt.4. The method according to claims 1 to 3, characterized characterized in that the vulcanization temperature is 225 ° C is. 5. Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Vulkanisationszeit 6 Minuten beträgt.5. The method according to claims 1 to 4, characterized characterized that the vulcanization time is 6 minutes is.
DE19873713741 1987-04-24 1987-04-24 Process for producing flexible tubes, in particular T-tubes and elbow tubes, from silicone rubber Withdrawn DE3713741A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873713741 DE3713741A1 (en) 1987-04-24 1987-04-24 Process for producing flexible tubes, in particular T-tubes and elbow tubes, from silicone rubber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873713741 DE3713741A1 (en) 1987-04-24 1987-04-24 Process for producing flexible tubes, in particular T-tubes and elbow tubes, from silicone rubber

Publications (1)

Publication Number Publication Date
DE3713741A1 true DE3713741A1 (en) 1988-11-17

Family

ID=6326219

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873713741 Withdrawn DE3713741A1 (en) 1987-04-24 1987-04-24 Process for producing flexible tubes, in particular T-tubes and elbow tubes, from silicone rubber

Country Status (1)

Country Link
DE (1) DE3713741A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10302883A1 (en) * 2003-01-25 2004-08-05 Contitech Luftfedersysteme Gmbh Bellow vulcanization process for car air springs
DE10320130A1 (en) * 2003-05-06 2004-11-25 Veritas Ag Method for producing hoses having at least one elastomeric material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7415183U (en) * 1973-05-29 1978-02-09 Industrie Pirelli S.P.A., Mailand (Italien) DEVICE FOR VULCANIZING A TUBE-SHAPED SEMI-FINISHED PRODUCT MADE OF NON-VULCANIZED RUBBER
DE2856760A1 (en) * 1977-12-30 1979-07-12 Dainichi Nippon Cables Ltd CONTINUOUS EXTRUDING AND VULCANIZING DEVICE
US4564353A (en) * 1979-09-01 1986-01-14 General Engineering Radcliffe 1979 Ltd. Continuous vulcanization and/or cross-linking apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7415183U (en) * 1973-05-29 1978-02-09 Industrie Pirelli S.P.A., Mailand (Italien) DEVICE FOR VULCANIZING A TUBE-SHAPED SEMI-FINISHED PRODUCT MADE OF NON-VULCANIZED RUBBER
DE2856760A1 (en) * 1977-12-30 1979-07-12 Dainichi Nippon Cables Ltd CONTINUOUS EXTRUDING AND VULCANIZING DEVICE
US4564353A (en) * 1979-09-01 1986-01-14 General Engineering Radcliffe 1979 Ltd. Continuous vulcanization and/or cross-linking apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10302883A1 (en) * 2003-01-25 2004-08-05 Contitech Luftfedersysteme Gmbh Bellow vulcanization process for car air springs
DE10302883B4 (en) * 2003-01-25 2021-06-24 Contitech Luftfedersysteme Gmbh Vulcanization process and vulcanization device with bellows for car air springs
DE10320130A1 (en) * 2003-05-06 2004-11-25 Veritas Ag Method for producing hoses having at least one elastomeric material

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Legal Events

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8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: B29D 23/22

8130 Withdrawal