DE1032520B - Process for the production of foils or protective covers, in particular covers for electrical cables or lines made of polyisobutylene mixtures - Google Patents

Process for the production of foils or protective covers, in particular covers for electrical cables or lines made of polyisobutylene mixtures

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Publication number
DE1032520B
DE1032520B DES31566A DES0031566A DE1032520B DE 1032520 B DE1032520 B DE 1032520B DE S31566 A DES31566 A DE S31566A DE S0031566 A DES0031566 A DE S0031566A DE 1032520 B DE1032520 B DE 1032520B
Authority
DE
Germany
Prior art keywords
production
covers
foils
polyisobutylene
electrical cables
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
DES31566A
Other languages
German (de)
Inventor
Ernst Fischer
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.)
Siemens AG
Original Assignee
Siemens 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
Priority to NL101498D priority Critical patent/NL101498C/xx
Application filed by Siemens AG filed Critical Siemens AG
Priority to DES31566A priority patent/DE1032520B/en
Priority to FR64782D priority patent/FR64782E/en
Priority to GB31170/53A priority patent/GB744517A/en
Publication of DE1032520B publication Critical patent/DE1032520B/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
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
    • B29C63/06—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like around tubular articles
    • B29C63/065—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like around tubular articles continuously
    • 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
    • B29C48/06—Rod-shaped
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • B29C53/50—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively using internal forming surfaces, e.g. mandrels
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3462—Cables

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

Verfahren zur Herstellung von Folien oder Schutzhüllen, insbesondere Überzüge für elektrische Kabel oder Leitungen aus Polyisobutylenmischungen Polyisobutylenmischungen mit hohem RuB-und/oder Graphitgehalt kommeri wegen ihrer hervorragenden Wasserundurchlässigkeit. insbesondere für die HarsteMung von Mänteln für elektrische Kabel uned Leitungen, in Betracht. Es wurde ber, vits vorgeschlagen, derartigen Mischungen, zur Beseitigung der störend empfundenen Kerbempnndlichkeit und Neigung zur Rißbildung einen geringen Anteil eines vulkanisierharen oder vernetzbaren Stoffes nebst den erforderlichen Vulkanisations- bzw. Vernetzungsmitteln beizugel) en. Dieser vulkanisierbare oder vernetzbare Anteil kann dem Polyisobutylen beigemischt oder aber bereits bei der Polymerisation einverleibt werden. Process for the production of films or protective covers, in particular Coatings for electrical cables or lines made from polyisobutylene mixtures. Polyisobutylene mixtures with a high carbon black and / or graphite content are commercially available because of their excellent impermeability to water. especially for the hardening of sheaths for electrical cables and wires, into consideration. It has been suggested over, vits to eliminate such mixtures the annoying notch sensitivity and tendency to crack formation Proportion of a vulcanizable or crosslinkable substance along with the necessary Add vulcanization or crosslinking agents. This vulcanizable or crosslinkable portion can be added to the polyisobutylene or else already in the Polymerization are incorporated.

Es ist bereits bekannt, Isolierstoffolien durch Ziehen des Werkstoffes herzustellen. Eine solche Behandlung ist jedoch bei ruß- und/oder graphithaltigen Polyisobutylenmischungen nicht ohne weiterem möglich, da sich bei diesen bereits nach geringfügigen Zugbeanspruchungen Einschnürungen ausbilden, die zu einem Reißen führen. Es wurde nun aber festgestellt, daß Polyisobutylenmischungen mit hohem Ruß-oder Graphitgehalt und einem geringen Anteil eines vulkanisierbaren oder vernetzbaren Stoffes nebst den erforderlichen Vilukanisations- bzw. Vernetzungsmitteln überraschenderweise einer quersch. nittsvermindernden Streckbehandiung bis zu einem. Mehrfachen der ursprünglichenLängeunterworfenwerdenkönnen.Derartige Streckbehandlungen sind dann möglich, wenn nach einem Verfahren gearbeitet wird, nach weichem erfindungsgemäß an einem aus dieser Mischung hergestellten sträng-oder bahnförmigen Zwischenerzeugnis zunächst dde Vulkanisierung bzw. Vernetzung des vulkanisier-bzw. vernetzbaren Anteiles bewirkt und dann dieses Zwischenerzeugnis einem querschnittsvernrindernden Streckprozeß unterworfen wird, d. h. einem Streckprozeß, l) ei dem der Querschnitt, z. B. der Durchmesser, und die Wandstärke des Zwischenerzeugnisses vermindert wird. It is already known to isolate foils by pulling the material to manufacture. Such a treatment is, however, in the case of carbon black and / or graphite-containing Polyisobutylene mixtures are not possible without further ado, since these are already form constrictions after slight tensile stresses that lead to tearing to lead. It has now been found, however, that polyisobutylene mixtures with a high carbon black or Graphite content and a small proportion of a vulcanizable or crosslinkable Surprisingly, the substance together with the necessary Vilukanisations- or crosslinking agents one cross. nit-reducing stretching treatment up to one. Multiples of original length can be subjected. Such stretching treatments are then possible if a process is used according to the invention on an intermediate product in the form of a strand or web produced from this mixture initially dde vulcanization or crosslinking of the vulcanizing or. networkable part causes and then this intermediate product a cross-section reducing stretching process is subjected, d. H. a stretching process, l) which the cross-section, z. B. the Diameter, and the wall thickness of the intermediate product is reduced.

Das ernndungsgemäße Verfahren zur Verarbeitung von Polyisobutylenmischungen kann beispielsweise für die Herstellung von Folien, die für Verpackungs-oder Abdichtungszwecke Verwendung finden können, angewandt werden. The method according to the invention for processing polyisobutylene mixtures can for example be used for the production of foils that are used for packaging or sealing purposes Can be used.

Besonders vorteilhaft ist da@ Verfahren aber auch für die Herstellung von Schutzmänteln für elektrische Kabel oder Leitungen, Für diese Zwecke wird vorzugsweise zunächst aus Polyisobutylenmischungen der vorstehend angegebenen Art ein Rohr mit einer lichten Weite, die ein Mehrfaches des Seelendurchmessers beträgt. hergestellt und nachdem die Vernetzung bzw. The process is also particularly advantageous for production of protective jackets for electrical cables or wires, for these purposes is preferred initially from polyisobutylene mixtures of the type specified above with a tube a clear width that is a multiple of the core diameter. manufactured and after the networking resp.

Vulkanisation des vernetzbaren oder vulkanisierl) aren Anteiles durchgeführt wurd'e. dieses Rohr unter gleichzeitigem Einzichen der Kabelseele in Längs- richtung gestreckt, so daß es sich unter Verringerung des Querschnittes auf die Seele auflegt.Vulcanization of the crosslinkable or vulkanisierl) arene portion carried out became. this tube with simultaneous drawing of the cable core in the longitudinal direction stretched so that it rests on the soul while reducing the cross section.

Das Rohr kann dabe, auf verschiedene Weise hergestel, lt werden. Beispielsweise ist es möglich, mittels einer bekannten Strangspritzmaschme einen Schlauch mit entsprechender Wandstärke und lichter Weite herzustellen. Zweckmäßig wird die zu umhüllende Kabelseele gleichzeitig in dlen Schlauch eingezogen und dieser nach Verlassen des Mundstückes auf den Seelendurchmesser durch Ziehen vermindert, indem die Seele mit gegenüber der Austrittsgeschwindigkeit des Schlauches aus der Strangpresse entsprechend gesteigerter Abzugsgeschwindigkeit abgezogen wird. The pipe can be manufactured in various ways. For example, it is possible by means of a known extrusion molding machine Produce a hose with the appropriate wall thickness and clear width. Appropriate the cable core to be sheathed is simultaneously drawn into the hose and this after leaving the mouthpiece reduced to the core diameter by pulling, by the soul with opposite the exit speed of the hose from the Extrusion press is withdrawn according to increased take-off speed.

In Fig. 1 der Zeichnung ist ei, ne Vorrichtung für die Durchführung dieses Verfahrens beispielsweise angedeutet. Mit Hilfe der Strangspritzmaschine 1 wird ein Schlauch 2 aus der Polyisobutyllenmischung gespritzt, dessen lichte Weite ein Mehrfaches der zu umhüllenden Kabelseele 3 leträgt, die von der Rückseite in die Spritzmaschine l eingeführt wird. Der Schlauch 2 mit der eingeführten Kabelseele wird mit einer entsprechend gesteigerten Geschwindigkeit durch die nicht dargestellte Abzugsvorrichtung abgezogen, wodurch sich cler Schlauch 2 nach dem Verlassen des Spritzkopfes der Strangspritzmaschine in einem mehr oder weniger spitz verlaufenden Konus unter gleichzeitiger Quersch, nittsverminderung auf die Kalelseele auflegt. In Fig. 1 of the drawing is egg, ne device for implementation this procedure is indicated, for example. With the help of the extrusion machine 1, a hose 2 is injected from the polyisobutylene mixture, its clear width a multiple of the cable core 3 to be sheathed, which from the rear in the injection machine l is introduced. The hose 2 with the inserted cable core is at a correspondingly increased speed by the not shown Pull-off device pulled off, whereby the hose 2 after leaving the Injection head of the extrusion machine in a more or less pointed The cone is placed on the Kalel core with a simultaneous cross cut.

Man kann das nachträglich zu streckende Rohr aber auch aus einem Band aus der Polyisobutylenmischung herstellen, das s achsparallel zum Rohr zusammengebogen wird und dessen Ränder stumpf oder überlappend miteinander verbunden, z. B. verschweißt werden. In Fig. 2 ist ein Ausführungsbeispiel eines solchen aus einem Band geschweißten Rohres dargestellt. Auch hierbei kann gleichzeitig mit der Bildung des Rohres die zu umhüllende Kabelseele in diese eingeführt und das Rohr unmittelbar nach seiiner Bildung gereckt werden. The tube to be stretched afterwards can also be made from a Make a tape from the polyisobutylene mixture, bend the axis parallel to the pipe will and the edges of which are butt or overlapping connected to one another, e.g. B. welded will. In Fig. 2 an embodiment of such is welded from a strip Rohres shown. Here, too, the formation of the tube can occur at the same time Cable core to be sheathed is inserted into this and the pipe immediately after it Education to be stretched.

In Fig. 3 ist eim solches Verfahren schematisch dargestellt. Das von der Ablauftrommel 11 kommende Band 12 wird in einer Vorrichtung 13, die z. B. aus eienem Trichter oder entsprechend gestalteten Walzen bestehen kann, um die in diese Vorrichtung einlaufende Kabelseele herum zu einem Rohr geformt. dessen lichte Weite ein Mehrfaches des Seelendurchmessers beträgt. Anschließend werden die Kanten des Bandes beispielswaise mittels Hochfrequenzelektroden 14 unter Wärmeanwendung miteinander verschweißt. In Fig. 3 such a method is shown schematically. That Coming from the discharge drum 11 tape 12 is in a device 13, the z. B. can consist of a funnel or appropriately designed rollers to the in this device is formed into a tube around the incoming cable core. its light Width is a multiple of the core diameter. Then the edges of the tape for example by means of high-frequency electrodes 14 with the application of heat welded together.

In diesem Bereich wird das Rohr zweckmäßig über einen rohrförmigen Stützdorn geführt. Nach Verlassen dlifeses Stützdornes wird dws Ro, hr dann gereckt. indem auch hier die Kabeiseele mit dem aufgezogenen Mantel mit einer gegenüber der Zuführungsgeschwindigkeit des Bandes entsprechend gesteigerten Geschwindigkeit abgezogen wird.In this area, the pipe is expediently a tubular Support mandrel guided. After leaving the life support mandrel, the tube is then stretched. by also here the cable core with the pulled-up coat with one opposite the The feed speed of the tape is deducted according to the increased speed will.

Es empfiehlt sich die Reckung bei möglichst tiefen Temperaturen vorzunehmen, um den Reckvorgang möglichst gleichmäßig zu gestalten. Zu diesem Zweck wird das Rohr bzw. Schlauch unmittelbar nach dem Austritt aus der Spritzmaschine (bei dem Ausführungsbeispiel nach Fig. 1) bzw. nach dem Verschweißen zum Rohr (Beispiel 3) gekühlt. It is advisable to stretch at the lowest possible temperatures, to make the stretching process as even as possible. For this purpose, the Pipe or hose immediately after exiting the spraying machine (with the Embodiment according to Fig. 1) or after welding to form a pipe (example 3) chilled.

Die dargestellten und beschriebenen Beispiele zeigen nur einige der möglichen Anwendungen für das Verfahren nach der Ernndung. So ist es unter anderem möglich, dem Rohr bei der Formung zunächst einen unrunden, beispielsweise eckigen Querschnitt zu geben, was unter Umständen die Verschweißung dar Längsnaht vereinfachen kann. An Stelle einer im Beispiel l dargestellten Geradeausspritzmaschine kann zur Herstellung des Schlauches auch eine andere, beispielswei, se Querkopfspritzmaschine Anwendung finden. Auch sonst ist das Verfahren je nach Bedarf für die verschiedensten Zwecke abwanddungsfahig. The examples shown and described show only some of the possible applications for the procedure after the harvest. So it is among other things possible to first give the tube a non-circular, for example angular, shape when it is formed To give cross-section, which may simplify the welding of the longitudinal seam can. Instead of a straight injection molding machine shown in Example 1, it is possible to the Another, for example, cross-head injection molding machine can also be used to manufacture the hose Find application. Otherwise, too, the procedure is different depending on the needs Purposes reversible.

PATENTANSPROCHE : 1. Verfahren zur Herstellung von Folien oder Schutzhüllen, insbesondere Überzügen für elektrische Kabel oder Leitungen, aus Polyisobutylenmischungen mit hohem Ruß-und/oder Graphitgehalt und einem geringen anteil eines vulkanisierbaren oder vernetzharen Stoffes nebst den erforderlichenVulkanisations-bzw.Vernetzungsmitteln, dadurch gekennzeichnet, daß an dem aus dieser Mischung hergestellten sträng-oder bahnförmigen Zwischenerzeugnis zunächst die Vulkanisierung bzw. Vernetzung des vulkanisier-bzw. vernetzbaren Anteiles bewirkt und dann dieses Zwischenerzeugnis einem querschnittsvermindernden Steckprozeß unterworfen wird. PATENT CLAIM: 1. Process for the production of foils or protective covers, in particular coatings for electric cables or lines, made of polyisobutylene mixtures With a high carbon black and / or graphite content and a small proportion of a vulcanizable material or crosslinkable substance together with the necessary vulcanization or crosslinking agents, characterized in that on the strand or produced from this mixture web-shaped intermediate product initially the vulcanization or crosslinking of the vulcanizing or. crosslinkable portion causes and then this intermediate product a cross-section reducing Plugging process is subjected.

Claims (1)

2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Streckung bis zu dem Zwei- oder Mehrfachen der ursprünglichen Länge erfolgt. 2. The method according to claim 1, characterized in that the stretching up to two or more times the original length. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Zwiscbenerzeugms als Rohr mit einer ein Mehrfaches des Seelendurchmesers des Kabels betragenden lichten Weite erzeugt und dann unter gleichzeitigem Einziehen der Seele in Längsrichtung gereckt wird. 3. The method according to claim 1, characterized in that the intermediate product as a tube with a diameter that is a multiple of the core diameter of the cable Width created and then with simultaneous pulling in of the soul in the longitudinal direction is stretched. 4. Verfahren nach Anspruch 3 unter Verwendung einer Strangspritzmaschine für die Erzeugung des Rohres, dadurch gekennzeichnet, daß das Strecken des Rohres durch eine gegenüber der Austrittsgeschwindigkeit aus dem Spritzkopf gesteigerten Abzugsgeschwindigkeit erreicht wird. 4. The method according to claim 3 using an extrusion molding machine for the production of the pipe, characterized in that the stretching of the pipe by an increased speed compared to the exit speed from the spray head Withdrawal speed is reached. 5. Verfahren nach Anspruch 1, dadurch, gekennzeichnet, daß das Zwischenerzeugnis als ein itn Längsrichtung zu einem Rohr zu formenden Band ausgebildet wird, dessen Kanten durch Schweißen dicht miteinander verbunden werden. 5. The method according to claim 1, characterized in that the intermediate product is formed as a itn longitudinal direction to a tube to be formed tape, the Edges are tightly connected to one another by welding.
DES31566A 1951-02-03 1952-12-18 Process for the production of foils or protective covers, in particular covers for electrical cables or lines made of polyisobutylene mixtures Pending DE1032520B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL101498D NL101498C (en) 1951-02-03
DES31566A DE1032520B (en) 1952-12-18 1952-12-18 Process for the production of foils or protective covers, in particular covers for electrical cables or lines made of polyisobutylene mixtures
FR64782D FR64782E (en) 1951-02-03 1953-11-09 Mixture based on polyisobutylene with a high content of oil black or graphite, and sheath for electric cables made with this mixture
GB31170/53A GB744517A (en) 1951-02-03 1953-11-10 Improvements in or relating to isobutylene polymer mixtures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES31566A DE1032520B (en) 1952-12-18 1952-12-18 Process for the production of foils or protective covers, in particular covers for electrical cables or lines made of polyisobutylene mixtures

Publications (1)

Publication Number Publication Date
DE1032520B true DE1032520B (en) 1958-06-19

Family

ID=7480570

Family Applications (1)

Application Number Title Priority Date Filing Date
DES31566A Pending DE1032520B (en) 1951-02-03 1952-12-18 Process for the production of foils or protective covers, in particular covers for electrical cables or lines made of polyisobutylene mixtures

Country Status (1)

Country Link
DE (1) DE1032520B (en)

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