DE2261027A1 - METHOD OF MANUFACTURING A DOUBLE WIRE INSULATED WITH FOAMED PLASTIC - Google Patents
METHOD OF MANUFACTURING A DOUBLE WIRE INSULATED WITH FOAMED PLASTICInfo
- Publication number
- DE2261027A1 DE2261027A1 DE2261027A DE2261027A DE2261027A1 DE 2261027 A1 DE2261027 A1 DE 2261027A1 DE 2261027 A DE2261027 A DE 2261027A DE 2261027 A DE2261027 A DE 2261027A DE 2261027 A1 DE2261027 A1 DE 2261027A1
- Authority
- DE
- Germany
- Prior art keywords
- blowing agent
- insulation
- plastic
- foamed plastic
- manufacturing
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- 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
- B29C48/156—Coating two or more articles simultaneously
-
- 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
- B29C48/05—Filamentary, e.g. strands
-
- 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
- B29C48/03—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
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- 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)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Molding Of Porous Articles (AREA)
Description
Patentanwalt Dipl.-Phys. Leo Thul 2261027Patent attorney Dipl.-Phys. Leo Thul 2261027
StuttgartStuttgart
J.Delves-Broughton - 8J.Delves-Broughton - Aug.
INTERNATIONAL STANDARD ELECTRIC CORPORATION, New YorkINTERNATIONAL STANDARD ELECTRIC CORPORATION, New York
Verfahren zur Herstellung einer mit geschäumtem Kunststoff isolierten DoppeladerProcess for the production of a pair of wires insulated with foamed plastic
Die Anmeldung betrifft ein Verfahren zur Herstellung einer mit geschäumtem Kunststoff isolierten Doppelader.The application relates to a method for producing a pair of wires insulated with foamed plastic.
Erfindungsgemäß geschieht dies dadurch., daß Je ein elektrischer Leiter durch zwei parallel verlaufende Öffnungen des Spritzkopfes einer Schneckenpresse hindurchgeführt und dabei auf beide einzeln eine mit einem Blähmittel versetzte Kunststoffisolation aufgespritzt wird, wobei die Öffnungen in einem solchen Abstand voneinander angeordnet sind, daß sich die einzeln isolierten Adern beim Expandieren der Kunststoffisolation nach dem Austritt aus dem Spritzkopf zu einer Doppelader vereinen.According to the invention, this is done. That each has an electrical Conductor passed through two parallel openings of the extrusion head of a screw press and a plastic insulation mixed with a blowing agent on both of them is sprayed on, the openings being arranged at such a distance from one another that the individually isolated Combine cores to form a twin core when expanding the plastic insulation after exiting the extrusion head.
Ein AusfUhrungsbeispiel der Erfindung wird anhand der beigefügten Figuren 1 bis J5 erläutert.An exemplary embodiment of the invention is based on the attached Figures 1 to J5 explained.
Es zeigen:Show it:
Fig. 1 eine Draufsicht auf das Ende des Spritzkopfes, 'Fig. 1 is a plan view of the end of the spray head, '
Fig. 2 einen Längsschnitt durch den Spritzkopf aus Fig. 1 und eine durch diesen/isolierte Doppelader undFIG. 2 shows a longitudinal section through the extrusion head from FIG. 1 and a pair of wires isolated by this / and
Fig. 3 einen Querschnitt entlang der Linie AA in Fig. 2 durch die fertige Doppelader.3 shows a cross section along the line AA in FIG the finished pair.
6.12.1972December 6, 1972
Bö/K -/-Gust / K - / -
309829/0758309829/0758
J.Delves-Broughton - 8J.Delves-Broughton - Aug.
Der bei dem Verfahren verwendete Spritzkopf 1 besitzt zwei parallele öffnungen 2, durch welche die elektrischen Leiter, beispielsweise aus Kupfer oder Aluminium, hindurchlaufen, damit eine Kunststoffisolation aufgespritzt wird. Die Mittelpunkte der öffnungen 2 sind in einem bestimmten Abstand d voneinander angeordnet. Als Kunststoffisolation findet ein Werkstoff Verwendung, der auf der fertigen Doppelader 5 eine geschäumte Form besitzt.The spray head 1 used in the process has two parallel ones Openings 2 through which the electrical conductors, for example made of copper or aluminum, run with it a plastic insulation is sprayed on. The center points of the openings 2 are at a certain distance d from one another arranged. A material is used as the plastic insulation which has a foamed shape on the finished twin core 5 owns.
Die Isolation kann aus Polyäthylen, in das ein geeignetes Blähmittel eingemischt ist, bestehen. Das Blähmittel kann ein chemisches Blähmittel, wie Azodicarbonamid, sein. Das chemische Blähmittel wird vor dem Aufspritzen mit der Isolation vermischt, und es zersetzt sich beispielsweise im Spritzkopf unter Bildung von Gasblasen in dem gespritzten Kunststoff, wobei dieser unter Ausdehnung aufgeschäumt wird. Die Ausdehnung dauert auch außer-The insulation can be made of polyethylene, in which a suitable blowing agent interfered, exist. The blowing agent can be a chemical blowing agent such as azodicarbonamide. The chemical Blowing agent is mixed with the insulation before spraying, and it decomposes to form, for example in the spray head of gas bubbles in the injected plastic, which is foamed with expansion. The expansion also lasts
tu© s s ο τ1 halb des Spritzkopfes noch eine Weile an, so daß sich der Durch-/ eines isolierten Leiters beim Austritt aus dem Spritzkopf vergrößert. Diese Ausdehnung außerhalb des Spritzkopfes wird bei dem anmeldungsgemäßen Verfahren dazu benutzt, um zwei einzeln schaumisolierte Leiter zu verbinden. Das Aufblähen der Isolation kann in Abänderung des Verfahrens auch dadurch herbeigeführt werden, daß in an sich bekannter Weise während des Auf-Tu © ss ο τ 1 half of the spray head for a while, so that the through / an insulated conductor increases when it emerges from the spray head. This expansion outside the spray head is used in the method according to the application to connect two individually foam-insulated conductors. The expansion of the insulation can also be brought about in a modification of the method in that, in a manner known per se, during the expansion
spritzens Gas in den Kunststoff eingebracht wird. In diesem Fall ist das Blähmittel ein physikalisches Blähmittel.splashing gas is introduced into the plastic. In this case the blowing agent is a physical blowing agent.
Wie bereits erwähnt, werden die beiden Leiter 3 durch den Spritzkopf 1 geführt und gleichzeitig einzeln isoliert, wodurch die Einzeladern 6 entstehen. Während des Durchlaufs durch den Spritzkopf 1 sind die Leiter im wesentlichen parallel zueinander gehalten und der Abstand d zwischen der Mittelpunkten der öffnungen ist derart gewählt, daß sich während der Ausdehnung der Isolation hinter dem Spritzkopf 1 die Isolation der beiden Leiter teilweise vermischt und beide Adern zusammenklebt. Die auf dieseAs already mentioned, the two conductors 3 are through the spray head 1 out and at the same time individually isolated, whereby the individual wires 6 arise. During the passage through the spray head 1 the conductors are kept essentially parallel to one another and the distance d between the centers of the openings is chosen so that during the expansion of the insulation behind the spray head 1, the insulation of the two conductors is partially mixed and both wires stuck together. The on this
309329/0758 ~/- 309329/0758 ~ / -
Weise erzeugte und den Querschnitt einer 8 aufweisende Doppelader 5 ist aus Fig. 3 ersichtlich. Der Abstand d hat einen wesentlichen Einfluß auf den endgültigen Querschnitt, d.h. das Maß der Verbindung beider Einzeladern.This is shown in FIG. 3, which is produced in this way and has the cross section of a pair of 8. The distance d has one Significant influence on the final cross-section, i.e. the degree of connection between the two individual wires.
Bei bestimmten Anwendungen der Doppeladern, beispielsweise in Pernsprechkabeln, ist es notwendig, beim Herstellen von Verbindungs- und Endmuffen die Doppelader in einfacher Weise in Einzeladern trennen zu können. Durch die vorgeschlagene Herstellungsweise wird diese leichte Trennbarkeit erreicht, wobei die -Trennbarkeit von der Güte .der Verklebung abhängt. Jedenfalls kann die erfindungsgemäß hergestellte Doppelader ohne Folgeschäden an einer der Adern aufgeteilt werden, so daß eine Trennung erst zum erwünschten Zeitpunkt durchgeführt werden braucht, um Adervertauschungen zu vermeiden.In certain applications of the twin cores, for example in telephone cables, it is necessary to and end sleeves convert the twin core into single cores in a simple manner to be able to separate. By the proposed manufacturing method this easy separability is achieved, the separability depending on the quality of the bond. In any case can the pair produced according to the invention without consequential damage be split on one of the wires so that a separation only needs to be carried out at the desired time, to avoid interchanging cores.
Die Leiter 3 können dem Spritzkopf 1 von einer üblichen Abwickeleinrichtung zugeführt werden, wobei jedoch auf die parallele Führung geachtet werden muß, welches durch an sich bekannte Führungen zu verwirklichen ist. Die fertige Doppelader kann auf eine übliche Aufwickeleinrichtung gewickelt werden.The conductors 3 can be attached to the extrusion head 1 from a conventional unwinding device are supplied, but attention must be paid to the parallel guidance, which is known per se guides is to be realized. The finished twin core can be wound on a conventional winding device.
Die'Leiter 3 können vor dem Aufbringen der geschäumten Isolation blank aber auch einzeln mit einer Schicht festen Kunststoffs, wie Polyäthylen, umspritzt sein.Die'Leiter 3 can before the foamed insulation is applied blank but also individually coated with a layer of solid plastic, such as polyethylene.
309823/0758309823/0758
Claims (5)
Patentansprüche;J.Delves-Broughton - Aug.
Claims ;
des Spritzkopfes einer Schneckenpresse hindurchgeführt und dabei auf beide einzeln eine mit einem Blähmittel versetzte Kunststoffisolation aufgespritzt wird, wobei die Öffnungen in einem solchen Abstand voneinander angeordnet sind, daß
sich die einzeln isolierten Adern beim Expandieren der Kunst stoffisolation nach dem Austritt aus dem Spritzkopf zu einer Doppelader vereinen.Process for the production of a pair of wires insulated with foamed plastic, characterized in that an electrical conductor passes through two parallel openings
of the injection head of a screw press and a plastic insulation mixed with a blowing agent is injected onto both individually, the openings being arranged at such a distance from one another that
the individually insulated wires combine to form a twin wire when the plastic insulation expands after exiting the spray head.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5842371 | 1971-12-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2261027A1 true DE2261027A1 (en) | 1973-07-19 |
Family
ID=10481586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2261027A Pending DE2261027A1 (en) | 1971-12-16 | 1972-12-13 | METHOD OF MANUFACTURING A DOUBLE WIRE INSULATED WITH FOAMED PLASTIC |
Country Status (12)
Country | Link |
---|---|
JP (1) | JPS4865470A (en) |
AT (1) | AT320776B (en) |
BE (1) | BE792771A (en) |
BR (1) | BR7208824D0 (en) |
CA (1) | CA998511A (en) |
DE (1) | DE2261027A1 (en) |
ES (1) | ES409644A1 (en) |
FR (1) | FR2163490B1 (en) |
GB (1) | GB1327186A (en) |
IT (1) | IT974695B (en) |
NL (1) | NL7216805A (en) |
ZA (1) | ZA728042B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2255742B (en) * | 1991-05-11 | 1994-03-09 | Northern Telecom Ltd | Manufacturing cables |
-
0
- BE BE792771D patent/BE792771A/en not_active IP Right Cessation
-
1971
- 1971-12-16 GB GB5842371A patent/GB1327186A/en not_active Expired
-
1972
- 1972-11-13 ZA ZA728042A patent/ZA728042B/en unknown
- 1972-12-05 IT IT7232472A patent/IT974695B/en active
- 1972-12-08 FR FR7243691A patent/FR2163490B1/fr not_active Expired
- 1972-12-08 CA CA158,395A patent/CA998511A/en not_active Expired
- 1972-12-11 NL NL7216805A patent/NL7216805A/xx not_active Application Discontinuation
- 1972-12-13 DE DE2261027A patent/DE2261027A1/en active Pending
- 1972-12-14 BR BR8824/72A patent/BR7208824D0/en unknown
- 1972-12-14 AT AT1064072A patent/AT320776B/en active
- 1972-12-15 ES ES409644A patent/ES409644A1/en not_active Expired
- 1972-12-15 JP JP47125376A patent/JPS4865470A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ES409644A1 (en) | 1976-01-01 |
AT320776B (en) | 1975-02-25 |
AU4959472A (en) | 1974-06-06 |
NL7216805A (en) | 1973-06-19 |
BE792771A (en) | 1973-06-15 |
FR2163490A1 (en) | 1973-07-27 |
GB1327186A (en) | 1973-08-15 |
JPS4865470A (en) | 1973-09-08 |
FR2163490B1 (en) | 1976-04-23 |
BR7208824D0 (en) | 1973-09-13 |
CA998511A (en) | 1976-10-19 |
IT974695B (en) | 1974-07-10 |
ZA728042B (en) | 1973-07-25 |
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