EP1715990A1 - Vulcanising mould for vehicle tyres - Google Patents

Vulcanising mould for vehicle tyres

Info

Publication number
EP1715990A1
EP1715990A1 EP04709238A EP04709238A EP1715990A1 EP 1715990 A1 EP1715990 A1 EP 1715990A1 EP 04709238 A EP04709238 A EP 04709238A EP 04709238 A EP04709238 A EP 04709238A EP 1715990 A1 EP1715990 A1 EP 1715990A1
Authority
EP
European Patent Office
Prior art keywords
vulcanization mold
tube blank
vulcanization
pressure
mold
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Withdrawn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
EP04709238A
Other languages
German (de)
French (fr)
Inventor
Klaus Binder
Harald Kranz
Rainer Oehl
Roland Wilmer
Karl Stenzel
Markus Berger
Jörg Schröder
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.)
ContiTech Luftfedersysteme GmbH
Original Assignee
ContiTech Luftfedersysteme 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 ContiTech Luftfedersysteme GmbH filed Critical ContiTech Luftfedersysteme GmbH
Publication of EP1715990A1 publication Critical patent/EP1715990A1/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Withdrawn legal-status Critical Current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
    • 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
    • B29C35/049—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp
    • 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
    • B29D22/00—Producing hollow articles
    • B29D22/02—Inflatable articles
    • B29D22/023—Air springs; Air bellows
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
    • B29C2049/4602—Blowing fluids
    • B29C2049/4638—Blowing fluids being a hot gas, i.e. gas with a temperature higher than ambient temperature
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/079—Auxiliary parts or inserts
    • B29C2949/08—Preforms made of several individual parts, e.g. by welding or gluing parts together
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/16—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing
    • B29C49/1602—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing pre-blowing without using a mould
    • 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
    • B29C49/18—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using several blowing steps
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
    • 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
    • B29K2019/00—Use of rubber not provided for in a single one of main groups B29K2007/00 - B29K2011/00, as moulding material
    • 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
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/258—Tubular
    • 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
    • B29L2022/00—Hollow articles
    • B29L2022/02—Inflatable articles
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/703—Bellows

Definitions

  • the invention relates to a method for producing cambered, vulcanized, tubular products according to the preamble of claim 1 and an apparatus for performing the method. Such methods are used in particular for the production of air springs in the field of motor vehicles.
  • tube blanks have previously been drawn from top to bottom onto a fixed inner mold and surrounded with a heating sleeve until the desired shape has been permanently obtained.
  • a tube blank was pressed from the inside to the outside over a heated tube against a fixed shape until the desired shape was achieved.
  • the object of the present invention is to provide a method and a device with which process-reliable hose cuts can be cambered and vulcanized.
  • the direct introduction of a heated fluid into the tube blank and the pressing of the tube blank from the inside against a vulcanization mold mean that the tube blank assumes the desired shape with little outlay on equipment. Furthermore, the fluid can provide the heat required for permanent shaping of the hose cut can be provided without the need for complex heating sleeves or heating hoses.
  • the fluid is advantageously heated and then introduced into the tube blank, since this can be introduced and discharged easily and quickly, which simplifies the process control.
  • a simple fixation of the tube blank in the vulcanization mold advantageously takes place by inserting the tube blank into the vulcanization mold and sealing it at both ends.
  • This seal which takes place, for example, by inserting two end plugs, clamps the tube blank to parts of the wall of the vulcanization molds, and by simply introducing the fluid through the drain plugs, the tube blank can be applied to the inside of the vulcanization mold by inflating and simultaneously moving the two vulcanization molds towards one another become.
  • the vulcanization mold is of split design and is moved along the longitudinal extent of the tube blank in the direction of the end plugs. At the same time, the tube blank is thereby lengthened, if necessary, or the correct length of the tube blank contained in the vulcanization mold is set and then the vulcanization mold halves are moved towards one another again in order to close the vulcanization mold.
  • the closing of the vulcanization mold takes place during the application of the crowning pressure, and the crowning pressure is increased to the vulcanization pressure level after the closing of the vulcanization mold. Applying the crowning pressure prevents the tube blank from collapsing. The vulcanization pressure is maintained until the tube blank has the desired shape and has reached the desired degree of vulcanization. The pressure is then released, the end plugs removed and the Vulcanization mold opened so that the finished vulcanized component can be removed from the mold.
  • the device for carrying out the method described above provides that the vulcanization shape is perpendicular to the longitudinal extent of the one to be vulcanized
  • Hose cut is divided so that on the one hand an adaptation to the hose length to be vulcanized and on the other hand an easy removal of the finished vulcanized hose cut can take place.
  • Two end plugs can be inserted into the vulcanization mold and fix the tube blank in the vulcanization mold, one end plug being designed such that a fluid, preferably superheated steam, can be introduced into the tube blank.
  • the resulting condensate water can also be discharged through an end plug.
  • FIG. 1 shows a sequence of method steps using a schematically represented device.
  • the figure shows a schematic sequence of vulcanization without a bellows or bladder, in which a tube blank 10 is inserted into a vulcanization mold 30.
  • the vulcanization mold 30 is divided in the middle perpendicular to the longitudinal extent of the tube blank 10 and has two openings through which the tube blank 10 protrudes.
  • End plugs 41 and 42 are inserted into the tube blank ends and then the vulcanization mold halves are moved apart along the longitudinal extent of the tube blank 10.
  • the ends of the tube blank 10 are fixed on the inside of the vulcanization mold 30 via the end plugs 41, 42.
  • a slight crowning pressure is passed through the end plug 41 into the tube blank 10 in order to expand it.
  • This slight crowning pressure is e.g. B. built over normal compressed air.
  • the crowning is finished when the vulcanization molds are closed and the bellows is completely against the vulcanization mold.
  • the compressed air supply is then shut off and the steam is introduced under high pressure.
  • the method described in this way and the corresponding device bring about high process reliability with simple technology and almost no wear on the device, with very low costs having to be expended both for the construction and for the maintenance. Furthermore, there is a high degree of flexibility in the product geometry since, due to the direct application of the internal pressure via an introduced fluid, the tube blank 10 largely adapts to every contour of the vulcanization mold 30. To avoid trapping air bubbles, you can A relief opening may be provided at selected points on the vulcanization mold 30; if appropriate, the entire vulcanization mold 30 may be provided with correspondingly small openings in order to prevent air from being trapped between the tube blank 10 and the vulcanization mold 30.
  • the fluid can only be heated after filling the tube blank 10; vulcanization mold 30 itself can also be heated. Resulting condensate is drained through the lower end plug 42.

Landscapes

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

Abstract

The invention relates to a method for producing cambered, tubular products, especially pneumatic springs, from a tubular section (10) that is internally subjected to a force of pressure and is pressed against a vulcanising mould (30). The invention also relates to a device for carrying out said method. The aim of the invention is to provide an economical method which is reliable in terms of the process, and a corresponding device. To this end, a heated fluid is introduced directly into the tubular section (10), and the tubular section (10) is pressed against the vulcanising mould (30).

Description

ContiTech Luftfedersysteme GmbH 203-007-PWO.l/Fg 13.01.2004ContiTech Luftfedersysteme GmbH 203-007-PWO.l / Fg 13.01.2004
Beschreibungdescription
Vulkanisierform für FahrzeugreifenVulcanizing mold for vehicle tires
Die Erfindung betrifft ein Verfahren zum Herstellen bombierter, vulkanisierter, schlauchförmiger Erzeugnisse gemäß dem Oberbegriff des Anspruches 1 sowie eine Vorrichtung zur Durchführung des Verfahrens. Solche Verfahren dienen insbesondere zur Herstellung von Luftfedern im Kxaftfahrzeugbereich.The invention relates to a method for producing cambered, vulcanized, tubular products according to the preamble of claim 1 and an apparatus for performing the method. Such methods are used in particular for the production of air springs in the field of motor vehicles.
Auf herkömmliche Art und Weise wurden bislang Schlauchzuschnitte von oben nach unten auf eine feste Innenform aufgezogen und mit einer Heizmanschette umgeben, bis die gewünschte Form dauerhaft erhalten wurde. Alternativ wurde ein Schlauchzuschnitt von innen nach außen über einen Heizschlauch gegen eine feste Form gedrückt, bis die gewünschte Form erzielt wurde. Diese Verfahren sind sehr aufwändig und benötigen einen großen apparativen Aufwand.In the conventional way, tube blanks have previously been drawn from top to bottom onto a fixed inner mold and surrounded with a heating sleeve until the desired shape has been permanently obtained. Alternatively, a tube blank was pressed from the inside to the outside over a heated tube against a fixed shape until the desired shape was achieved. These processes are very complex and require a great deal of equipment.
Aufgabe der vorliegenden Erfindung ist es, ein Verfahren und eine Vorrichtung bereitzustellen, mit denen prozesssicher Schlauchzuschnitte bombiert und vulkanisiert werden können.The object of the present invention is to provide a method and a device with which process-reliable hose cuts can be cambered and vulcanized.
Erfindungsgemäß wird diese Aufgabe durch ein Verfahren mit den Merkmalen des Anspruchs 1 sowie durch eine Vorrichtung mit den Merkmalen des Anspruches 8 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen aufgeführt.According to the invention, this object is achieved by a method having the features of claim 1 and by a device having the features of claim 8. Advantageous refinements and developments of the invention are listed in the subclaims.
Durch die unmittelbare Einleitung eines erhitzten Fluides in den Schlauchzuschnitt und das Pressen des Schlauchzuschnittes von innen gegen eine Vulkanisationsform wird mit geringem apparativen Aufwand erreicht, dass der Schlauchzuschnitt die gewünschte Form annimmt. Weiterhin kann durch das Fluid die benötigte Wärme zur dauerhaften Formung des Schlauchzuschnittes bereitgestellt werden, ohne dass aufwändige Heizmanschetten oder Heizschläuche angelegt oder eingelegt werden müssten.The direct introduction of a heated fluid into the tube blank and the pressing of the tube blank from the inside against a vulcanization mold mean that the tube blank assumes the desired shape with little outlay on equipment. Furthermore, the fluid can provide the heat required for permanent shaping of the hose cut can be provided without the need for complex heating sleeves or heating hoses.
Vorteilhafterweise wird das Fluid erhitzt und dann in den Schlauchzuschnitt eingeleitet, da dieses leicht und schnell eingeleitet und abgelassen werden kann, was die Prozeßführung erleichtert.The fluid is advantageously heated and then introduced into the tube blank, since this can be introduced and discharged easily and quickly, which simplifies the process control.
Eine einfache Fixierung des Schlauchzuschnittes in der Vulkanisationsform erfolgt vorteilhafterweise dadurch, dass der Schlauchzuschnitt in die Vulkanisationsform eingeführt und an beiden Enden abgedichtet wird. Durch diese Abdichtung, die beispielsweise durch Einführen zweier Endstopfen stattfindet, wird der Schlauchzuschnitt an Teilen der Wandung der Vulkanisationsformen festgeklemmt und durch einfaches Einleiten des Fluides durch die Abflussstopfen kann durch Aufblähen und gleichzeitigens Aufeinanderzubewegen der beiden Vulkanisationsformen ein Anlegen des Schlauchzuschnittes an die Innenseite der Vulkanisationsform bewirkt werden.A simple fixation of the tube blank in the vulcanization mold advantageously takes place by inserting the tube blank into the vulcanization mold and sealing it at both ends. This seal, which takes place, for example, by inserting two end plugs, clamps the tube blank to parts of the wall of the vulcanization molds, and by simply introducing the fluid through the drain plugs, the tube blank can be applied to the inside of the vulcanization mold by inflating and simultaneously moving the two vulcanization molds towards one another become.
Zum Einklemmen der Schlauchzuschnitte ist es vorgesehen, dass die Vulkanisationsform geteilt ausgebildet ist und entlang der Längserstreckung des Schlauchzuschnittes in Richtung auf die Endstopfen verfahren wird. Gleichzeitig wird dadurch der Schlauchzuschnitt ggf. gelängt bzw. die korrekte Länge des in der Vulkanisationsform enthaltenen Schlauchzuschnittes wird eingestellt und anschließend werden die Vulkanisationsformhälften wieder aufeinander zu verfahren, um die Vulkansisationsform zu verschließen.In order to clamp the tube blanks, it is provided that the vulcanization mold is of split design and is moved along the longitudinal extent of the tube blank in the direction of the end plugs. At the same time, the tube blank is thereby lengthened, if necessary, or the correct length of the tube blank contained in the vulcanization mold is set and then the vulcanization mold halves are moved towards one another again in order to close the vulcanization mold.
Das Schließen der Vulkanisationsform erfolgt während des Aufbringens des Bombierungsdruckes, und der Bombierungsdruck wird nach dem Schließen der Vulkanisationsform auf Vulkanisationsdruckniveau erhöht. Durch das Aufbringen des Bombierungsdruckes wird verhindert, dass der Schlauchzuschnitt in sich zusammenfällt. Der Vulkanisationsdruck wird solange aufrechterhalten, bis der Schlauchzuschnitt die gewünschte Form erhalten und den gewünschten Vulkanisationsgrad erreicht hat. Anschließend werden der Druck abgelassen, die Endstopfen entfernt und die Vulkanisationsform geöffnet, so dass das fertig vulkanisierte Bauteil aus der Form entnommen werden kann.The closing of the vulcanization mold takes place during the application of the crowning pressure, and the crowning pressure is increased to the vulcanization pressure level after the closing of the vulcanization mold. Applying the crowning pressure prevents the tube blank from collapsing. The vulcanization pressure is maintained until the tube blank has the desired shape and has reached the desired degree of vulcanization. The pressure is then released, the end plugs removed and the Vulcanization mold opened so that the finished vulcanized component can be removed from the mold.
Die Vorrichtung zur Durchführung des oben beschriebenen Verfahrens sieht vor, dass die Vulkanisationsform senkrecht zur Längserstreckung des zu vulkanisierendenThe device for carrying out the method described above provides that the vulcanization shape is perpendicular to the longitudinal extent of the one to be vulcanized
Schlauchzuschnittes geteilt ist, damit einerseits eine Anpassung an die zu vulkanisierende Schlauchlänge und andererseits ein leichtes Entfernen des fertig vulkanisierten Schlauchzuschnittes erfolgen kann. Zwei Endstopfen sind in die Vulkanisationsform einführbar und legen den Schlauchzuschnitt in der Vulkanisationsform fest, wobei ein Endstopfen dergestalt ausgebildet ist, dass ein Fluid, vorzugsweise Heißdampf, in den Schlauchzuschnitt einleitbar ist. Ebenso kann das entstehende Kondensatwasser durch einen Endstopfen abgeführt werden. Hose cut is divided so that on the one hand an adaptation to the hose length to be vulcanized and on the other hand an easy removal of the finished vulcanized hose cut can take place. Two end plugs can be inserted into the vulcanization mold and fix the tube blank in the vulcanization mold, one end plug being designed such that a fluid, preferably superheated steam, can be introduced into the tube blank. The resulting condensate water can also be discharged through an end plug.
Anhand der einzigen Figur wird ein Ausführungsbeispiel der Erfindung näher beschrieben werden. Die Figur zeigt eine Abfolge von Verfahrensschritten anhand einer schematisch dargestellten Vorrichtung.An embodiment of the invention will be described in more detail with reference to the single figure. The figure shows a sequence of method steps using a schematically represented device.
Die Figur zeigt einen schematischen Ablauf einer Vulkanisation ohne Bläh- oder Heizbalg, bei dem ein Schlauchzuschnitt 10 in eine Vulkanisationsform 30 eingeführt wird. Die Vulkanisationsform 30 ist senkrecht zu der Längserstreckung des Schlauchzuschnittes 10 mittig geteilt und weist zwei Öffnungen auf, durch die der Schlauchzuschnitt 10 hindurch ragt. Endstopfen 41 und 42 werden in die Schlauchzuschnittenden eingeführt und anschließend werden die Vulkanisationsformhälften entlang der Längserstreckung des Schlauchzuschnittes 10 auseinander gefahren. Dadurch werden die Enden des Schlauchzuschnittes 10 an der Innenseite der Vulkanisationsform 30 über die Endstopfen 41, 42 festgelegt. Anschließend wird ein leichter Bombierungsdruck durch den Endstopfen 41 in den Schlauchzuschnitt 10 geleitet, um diesen aufzuweiten. Dieser leichte Bombierdruck wird z. B. über normale Druckluft aufgebaut. Das Bombieren ist dann beendet, wenn die Vulkanisatonsformen geschlossen sind und der Balg vollständig an der Vulkanisationsform anliegt. Anschließend wird die Druckluftzufuhr abgeriegelt und der Dampf unter hohem Druck eingeleitet.The figure shows a schematic sequence of vulcanization without a bellows or bladder, in which a tube blank 10 is inserted into a vulcanization mold 30. The vulcanization mold 30 is divided in the middle perpendicular to the longitudinal extent of the tube blank 10 and has two openings through which the tube blank 10 protrudes. End plugs 41 and 42 are inserted into the tube blank ends and then the vulcanization mold halves are moved apart along the longitudinal extent of the tube blank 10. As a result, the ends of the tube blank 10 are fixed on the inside of the vulcanization mold 30 via the end plugs 41, 42. Subsequently, a slight crowning pressure is passed through the end plug 41 into the tube blank 10 in order to expand it. This slight crowning pressure is e.g. B. built over normal compressed air. The crowning is finished when the vulcanization molds are closed and the bellows is completely against the vulcanization mold. The compressed air supply is then shut off and the steam is introduced under high pressure.
Das heißt, während des Aufbringens des Bombierungsdruckes wird die Vulkanisationsform 30 wieder geschlossen und abschließend wird ein Vulkanisationsdampfdruck aufgebracht, so dass der Schlauchzuschnitt 10 vollständig glattwandig an der Innenwandung der Vulkanisationsform 30 anliegt.This means that the vulcanization mold 30 is closed again during the application of the crowning pressure and finally a vulcanization vapor pressure is applied, so that the tube blank 10 lies completely smooth-walled on the inner wall of the vulcanization mold 30.
Das solcherart beschriebene Verfahren und die entsprechende Vorrichtung bewirkt mit einfacher Technik und nahezu ohne Verschleiß der Vorrichtung eine hohe Prozesssicherheit, wobei sehr geringe Kosten sowohl für die Konstruktion als auch für die Instandhaltung aufgewendet werden müssen. Weiterhin ist eine hohe Flexibilität in der Produktgeometrie gegeben, da auf Grund des unmittelbaren Aufbringens des Innendruckes über ein eingeleitetes Fluid der Schlauchzuschnitt 10 sich weitgehend jeder Kontur der Vulkanisationsform 30 anpasst. Um ein Einschließen von Luftblasen zu vermeiden, kann an ausgewählten Stellen der Vulkanisationsform 30 eine Entlastungsöffnung vorgesehen sein, gegebenenfalls kann die gesamte Vulkanisationsform 30 mit entsprechend kleinen Öffnungen versehen sein, um das Einschließen von Luft zwischen Schlauchzuschnitt 10 und Vulkanisationsform 30 zu verhindern.The method described in this way and the corresponding device bring about high process reliability with simple technology and almost no wear on the device, with very low costs having to be expended both for the construction and for the maintenance. Furthermore, there is a high degree of flexibility in the product geometry since, due to the direct application of the internal pressure via an introduced fluid, the tube blank 10 largely adapts to every contour of the vulcanization mold 30. To avoid trapping air bubbles, you can A relief opening may be provided at selected points on the vulcanization mold 30; if appropriate, the entire vulcanization mold 30 may be provided with correspondingly small openings in order to prevent air from being trapped between the tube blank 10 and the vulcanization mold 30.
Neben Luft können unterschiedlichste Materialien als Energieträger und Energietransporteur eingesetzt werden, insbesondere können auch unterschiedliche Energieeintragverfahren realisiert werden. Beispielsweise kann das Fluid erst nach Befüllung des Schlauchzuschnittes 10 erwärmt werden; ebenfalls kann die Vulkanisationsform 30 selbst erwärmt werden. Enstehendes Kondensat wird durch den unteren Endstopfen 42 abgeleitet. In addition to air, a wide variety of materials can be used as an energy carrier and energy transporter; in particular, different energy input processes can also be implemented. For example, the fluid can only be heated after filling the tube blank 10; vulcanization mold 30 itself can also be heated. Resulting condensate is drained through the lower end plug 42.

Claims

Patentansprüche claims
1. Verfahren zum Herstellen bombierter, schlauchförmiger Erzeugnisse, insbesondere Luftfedern, aus einem Schlauchzuschnitt (10), der von innen mit einer Druckkraft beaufschlagt und gegen eine Vulkanisationsform (30) gedrückt wird, dadurch gekennzeichnet, dass unmittelbar in den Schlauchzuschnitt (10) ein erhitztes Fluid eingeleitet und der Schlauchzuschnitt (10) gegen die Vulkanisationsform (30) gepreßt wird.1. A method for producing cambered, tubular products, in particular air springs, from a tube blank (10) which is pressurized from the inside and pressed against a vulcanization mold (30), characterized in that a heated one is directly in the tube blank (10) Fluid is introduced and the tube blank (10) is pressed against the vulcanization mold (30).
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als Fluid erhitzter Dampf in den Schlauchzuschnitt (10) eingeleitet wird.2. The method according to claim 1, characterized in that steam heated as a fluid is introduced into the tube blank (10).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Schlauchzuschnitt (10) in die Vulkanisationsform (30) eingeführt und an beiden Enden abgedichtet und an der Wandung der Vulkanisationsform (30) festgelegt wird.3. The method according to claim 1 or 2, characterized in that the tube blank (10) is inserted into the vulcanization mold (30) and sealed at both ends and fixed to the wall of the vulcanization mold (30).
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass der Schlauchzuschnitt (10) an der Innenseite der Vulkanisationsform (30) durch Einklemmen über Endstopfen (41, 42) festgelegt wird.4. The method according to claim 3, characterized in that the tube blank (10) on the inside of the vulcanization mold (30) is fixed by clamping via end plugs (41, 42).
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass zum Einklemmen die Vulkanisationsform (30) geteilt und entlang der Längserstreckung des Schlauchzuschnittes (10) in Richtung auf die Endstopfen (41, 42) verfahren wird.5. The method according to claim 4, characterized in that for clamping the vulcanization mold (30) is divided and moved along the longitudinal extent of the tube blank (10) in the direction of the end plugs (41, 42).
Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass über zumindest einen Endstopfen (41, 42) der Schlauchzuschnitt (10) mit einem Bombierungsdruck beaufschlagt wird. A method according to claim 4 or 5, characterized in that a crown pressure is applied to the tube blank (10) via at least one end plug (41, 42).
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass während des Aufbringens des Bombierungsdruckes die Vulkanisationsform (30) geschlossen und anschließend der Bombierungsdruck auf Vulkanisationsdruck erhöht wird.7. The method according to claim 6, characterized in that the vulcanization mold (30) is closed during the application of the crowning pressure and then the crowning pressure is increased to vulcanization pressure.
8. Vorrichtung zur Durchführung des Verfahrens nach einem der voranstehenden Ansprüche, mit einer Vulkanisationsform (30), die senkrecht zu der Längserstreckung eines zu vulkanisierenden Schlauchzuschnittes (10) geteilt ist, sowie mit zwei Endstopfen (41, 42), die in Endabschnitte der Vulkanisationsform (30) einführbar sind und einen Schlauchzuschnitt (10) in der Vulkanisationsform (30) festlegen, wobei durch zumindest einen Endstopfen (41) ein Fluid einleitbar ist.8. Device for carrying out the method according to one of the preceding claims, with a vulcanization mold (30) which is divided perpendicular to the longitudinal extent of a hose blank (10) to be vulcanized, and with two end plugs (41, 42) which are in end sections of the vulcanization mold (30) can be inserted and fix a tube blank (10) in the vulcanization mold (30), wherein a fluid can be introduced through at least one end plug (41).
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass der Vulkanisationsform (30) eine Einrichtung zum Verfahren zumindest einer Hälfte der Vulkanisationsform (30) entlang der Längserstreckung des Schlauchzuschnittes (10) zugeordnet ist. 9. The device according to claim 8, characterized in that the vulcanization mold (30) is associated with a device for moving at least one half of the vulcanization mold (30) along the longitudinal extent of the tube blank (10).
EP04709238A 2004-02-09 2004-02-09 Vulcanising mould for vehicle tyres Withdrawn EP1715990A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/001149 WO2005077631A1 (en) 2004-02-09 2004-02-09 Vulcanising mould for vehicle tyres

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EP1715990A1 true EP1715990A1 (en) 2006-11-02

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EP04709238A Withdrawn EP1715990A1 (en) 2004-02-09 2004-02-09 Vulcanising mould for vehicle tyres

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WO (1) WO2005077631A1 (en)

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DE102007052738A1 (en) 2007-11-06 2009-05-07 Continental Aktiengesellschaft Method for producing cambered, tubular products

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FR2534848B1 (en) * 1982-10-22 1988-02-12 Olaer Ind Sa ELASTOMERIC BLADDER, PROCESS AND MANUFACTURING MOLD THEREOF AND APPLICATIONS THEREOF, IN PARTICULAR PRESSURE TANKS
JPH06226828A (en) * 1993-01-29 1994-08-16 Ube Ind Ltd Blow molding method
IT1266811B1 (en) * 1993-12-23 1997-01-21 Psa Sist Antivibranti Spa FLEXIBLE MEMBRANE FOR AIR SPRINGS, AND MOLDING EQUIPMENT
CA2160487C (en) * 1994-02-17 2003-09-23 Lixiao Wang Process improvements for preparing catheter balloons
DE10103257A1 (en) * 2001-01-25 2002-08-01 Continental Luftfedersysteme G Vulcanizing tool for curing a preform for air spring rolling bellows without use of an internal bag has a central mandrel with bolts and segments forming an expandable sealing disc at each end

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Title
See references of WO2005077631A1 *

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