DE3501485A1 - Bellows or tubular body for use during the vulcanisation of rubber articles - Google Patents

Bellows or tubular body for use during the vulcanisation of rubber articles

Info

Publication number
DE3501485A1
DE3501485A1 DE19853501485 DE3501485A DE3501485A1 DE 3501485 A1 DE3501485 A1 DE 3501485A1 DE 19853501485 DE19853501485 DE 19853501485 DE 3501485 A DE3501485 A DE 3501485A DE 3501485 A1 DE3501485 A1 DE 3501485A1
Authority
DE
Germany
Prior art keywords
bellows
rubber
particles
use during
vulcanising
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Withdrawn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
DE19853501485
Other languages
German (de)
Inventor
Dieter Dipl.-Ing. 3050 Wunstorf Holm
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.)
Continental AG
Original Assignee
Continental Gummi Werke 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 Continental Gummi Werke AG filed Critical Continental Gummi Werke AG
Priority to DE19853501485 priority Critical patent/DE3501485A1/en
Publication of DE3501485A1 publication Critical patent/DE3501485A1/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Withdrawn legal-status Critical Current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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0013—Conductive
    • 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
    • B29L2030/00—Pneumatic or solid tyres or parts thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Sealing Devices (AREA)

Abstract

For vulcanising vehicle pneumatic tyres and other articles built up from rubber, flexible diaphragms or expandable hollow bodies, so-called heating bellows (bladders), pressurised with the liquid or gaseous vulcanising medium are in many cases used as pressure-exerting and shaping elements. According to the invention these diaphragms or heating bellows (bladders) are made of rubber of plastic enriched with metal particles or similar readily heat-conducting particles in order to improve and accelerate the heat transfer from the vulcanising medium to the articles to be vulcanised.

Description

Balg- oder Schlauchkörper für die Verwendung währendBellows or hose bodies for use during

des Vulkanisierens von Gegenständen aus Kautschuk Die Erfindung bezieht sich auf aus Gummi oder gummiähnlichem Kunststoff hergestellte Balg- oder Schlauchkörper für die Verwendung während des Vulkanisierens von Gegenständen aus Kautschuk, insbesondere auf aufblasbare Heizbälge für Luftreifen.of vulcanizing articles made of rubber The invention relates on bellows or hose bodies made of rubber or rubber-like plastic for use during vulcanization of articles made of rubber, in particular on inflatable bladders for pneumatic tires.

Es ist bekannt und seit langem übliche Praxis, die Luftreifen-Rohlinge mit Hilfe von als dehnungsfähige Formkerne eingelegten torusförmigen Heizbälgen an die Innenwandungen der Vulkanisierform anzupressen.It is known and has long been the common practice to use blanks for pneumatic tires with the help of toroidal heating bellows inserted as expandable mold cores to press against the inner walls of the vulcanizing mold.

Als Druckmittel zum Aufblasen und Ausdehnen der Heizbälge dient dabei vorteilhaft ein Heizmedium, wodurch sich die Vulkanisationszeit beträchtlich abkürzen läßt. Da der elastomere Werkstoff der Heizbälge im Vergleich zu dem metallischen Werkstoff. der Außenform aber einen um Größenordnungen schlechteren Wärmeleitwert aufweist, bilden die Balgwandungen stets eine den Wärmeübergang verzögernde Sperre. Der Erfindung liegt demgemäß als Aufgabe zugrunde, den Wärmefluß auf den Rohling in beiden Richtungen möglichst weitgehend zu vergleichmäßigen und als Folge davon die notwendige Vulkanisationszeit noch weiter zu senken. Die Aufgabenstellung gilt nicht nur für das Vulkanisieren von Luftreifen, sondern sie besteht in gleicher Weise in Verbindung mit anderen Gegenständen aus Kautschuk, soweit diese während des Vulkanisierens dem Formungsdruck eines Blähkörpers unterworfen werden.The pressure medium used to inflate and expand the heating bellows is used advantageously a heating medium, which considerably shortens the vulcanization time leaves. Because the elastomeric material of the heating bellows is compared to the metallic Material. the outer shape, however, has an order of magnitude poorer thermal conductivity has, the bellows walls always form a barrier that delays the transfer of heat. The invention is accordingly based on the object of the heat flow to the blank as far as possible in both directions and as a result to reduce the necessary vulcanization time even further. The task is valid not only for the vulcanization of pneumatic tires, but it consists of the same Way in conjunction with other rubber items, as far as these during of vulcanization are subjected to the molding pressure of an inflatable body.

Nach der Erfindung zeichnen sich Balg- oder Schlauchkörper der ein- gangs geschilderten Gattung dadurch aus, daß sie in ihre Wandung in loser Verteilung eingebettete metallische oder aus einem anderen gut wärmeleitenden Stoff bestehende Teilchen enthalten, wobei die Teilchen der Balgwandung zweckmäßig entweder in Pulver- oder Granulatform oder aber als in Wirrlage verteilte kurzfasern zugemischt sind.According to the invention, bellows or hose bodies of the one gangs described genus by the fact that it is embedded loosely in its walls metallic particles or particles made of another material that conducts heat well contain, the particles of the bellows wall expediently either in powder or Granulate form or as short fibers distributed in random layers are added.

Die neuartigen Balgkörper weisen aufgrund der als Aufbaukomponente in ihren Wandungen angereicherten Metallteilchen eine im Vergleich zu bekannten Ausführungen wesentlich höhere, den metallischen Formteilen wertmäßig schon angenäherte Wärmeleitfähigkeit auf. Begünstigend für diesen Effekt ist die unmittelbare Berührung möglichst vieler Teilchen untereinander, wie sie sich bei Verwendung von Pulvern schon aus der Verteilungsdichte, bei Verwendung von Kurzfasern dagegen mit noch größerer Sicherheit aus der ungerichteten Verteilung in Wirrlage ergibt.The new types of bellows are designed as a structural component Metal particles enriched in their walls are compared to known ones Versions are much higher, in terms of value already approximated to the metallic molded parts Thermal conductivity. Direct contact is beneficial for this effect as many particles as possible with each other, as they are when using powders already from the distribution density, when using short fibers, on the other hand, with still greater security results from the undirected distribution in a confused position.

Die Gebrauchstüchtigkeit, Funktionsfähigkeit und die Lebensdauer der Balgkörper wird durch das Vorhandensein der Metallteilchen in keiner Weise beeinträchtigt, und auch das gegebenenfalls vorgesehene Einbetten von Festigkeitsträgern oder das Anbringen von Armaturen bleiben davon unberührt.The serviceability, functionality and service life of the The presence of the metal particles does not affect the bellows body in any way. and also the possibly provided embedding of reinforcements or that The attachment of fittings remains unaffected.

Als Teilchenwerkstoff kommen bevorzugt Metalle und Metallegierungen in Frage, soweit diese keinen nachteiligen Einfluß auf die Kautschukmatrix ausüben. Im Rahmen der Erfindung geeignete Metallteilchen sind beispielsweise Pulver oder Feindrähte aus Bronze, Messing oder Kupfer, Eisenfeilspäne u. dgl.Metals and metal alloys are preferred as the particle material in question as long as they do not have a negative influence on the rubber matrix. In the context of the invention suitable metal particles are, for example, powder or Fine wires made of bronze, brass or copper, iron filings and the like.

Zum Verdeutlichen der Erfindung ist ein Teilstück eines Heizbalges in der Zeichnung im Querschnitt dargestellt. In die aus einer warmfesten Kautschukmischung bestehende Balgwandung 1 sind kurze Feindrähte 2 aus Stahl oder Kupfer nach Art von Stapelfasern in verhältnismäßig dichter, aber regelloser Verteilung eingebettet.To illustrate the invention is a section of a bladder shown in the drawing in cross section. In those made of a heat-resistant rubber mixture existing bellows wall 1 are short fine wires 2 made of steel or copper according to Art embedded by staple fibers in a relatively dense but random distribution.

- Leerseite -- blank page -

Claims (3)

Patentansprüche: 1. Aus Gummi oder gummiähnlichem Kunststoff hergestellter Balg- oder Schlauchkörper für die Verwendung während des Vulkanisierens von Gegenständen aus Kautschuk, insbesondere aufblasbarer Heizbalg für Luftreifen, dadurch gekennzeichnet, daß er in seine Wandung in loser Verteilung eingebettete metallische oder aus einem anderen gut wärmeleitenden Stoff bestehende Teilchen enthält.Claims: 1. Made of rubber or rubber-like plastic Bellows or hose bodies for use during article vulcanization Made of rubber, in particular inflatable bladders for pneumatic tires, characterized in that that it is embedded in its wall in a loose distribution of metallic or of a contains other highly thermally conductive material existing particles. 2. Heizbalg nach Anspruch 1, dadurch gekennzeichnet, daß die Teilchen in Pulver- oder Granulatform der Balgwandung zugemischt sind.2. Bladder according to claim 1, characterized in that the particles are mixed in powder or granular form of the bellows wall. 3. Heizbalg nach Anspruch 1, dadurch gekennzeichnet, daß die Teilchen in Form von in Wirrlage verteilten Kurzfasern der Balgwandung zugemischt sind.3. Bladder according to claim 1, characterized in that the particles are admixed in the form of short fibers distributed in a random layer of the bellows wall.
DE19853501485 1985-01-18 1985-01-18 Bellows or tubular body for use during the vulcanisation of rubber articles Withdrawn DE3501485A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853501485 DE3501485A1 (en) 1985-01-18 1985-01-18 Bellows or tubular body for use during the vulcanisation of rubber articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853501485 DE3501485A1 (en) 1985-01-18 1985-01-18 Bellows or tubular body for use during the vulcanisation of rubber articles

Publications (1)

Publication Number Publication Date
DE3501485A1 true DE3501485A1 (en) 1986-07-24

Family

ID=6260107

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853501485 Withdrawn DE3501485A1 (en) 1985-01-18 1985-01-18 Bellows or tubular body for use during the vulcanisation of rubber articles

Country Status (1)

Country Link
DE (1) DE3501485A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005557A1 (en) * 1986-03-13 1987-09-24 M & T Laminates Limited Lamination of sheet materials
FR2710001A1 (en) * 1993-09-13 1995-03-24 Schwartz Luc Joseph Mould for the production of hot-cast articles, process for manufacturing such a mould and moulded products obtained
EP3079874A4 (en) * 2013-12-13 2017-08-23 Bridgestone Americas Tire Operations, LLC Curing bladder comprised of materials with varying thermal conductivity

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005557A1 (en) * 1986-03-13 1987-09-24 M & T Laminates Limited Lamination of sheet materials
FR2710001A1 (en) * 1993-09-13 1995-03-24 Schwartz Luc Joseph Mould for the production of hot-cast articles, process for manufacturing such a mould and moulded products obtained
EP3079874A4 (en) * 2013-12-13 2017-08-23 Bridgestone Americas Tire Operations, LLC Curing bladder comprised of materials with varying thermal conductivity

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: CONTINENTAL AKTIENGESELLSCHAFT, 3000 HANNOVER, DE

8139 Disposal/non-payment of the annual fee