DE835467C - Insulating sleeves for electrical conductors and processes for their manufacture - Google Patents
Insulating sleeves for electrical conductors and processes for their manufactureInfo
- Publication number
- DE835467C DE835467C DES20873A DES0020873A DE835467C DE 835467 C DE835467 C DE 835467C DE S20873 A DES20873 A DE S20873A DE S0020873 A DES0020873 A DE S0020873A DE 835467 C DE835467 C DE 835467C
- Authority
- DE
- Germany
- Prior art keywords
- conductor
- hollow
- spinning
- stretching
- ring nozzle
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0241—Disposition of insulation comprising one or more helical wrapped layers of insulation
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
Isolierhülle für elektrisdhe Leiter und Verfahren zu deren Herstellung Es ist bekannt, elektrische Leiter mit synthetischen, langkettigen Linearkondensationspolyamiden als Isovierstoff zu ummanteln, indem der Leiter durch geschmolzene Polymere bewegt und der Überzug durch Kaltstrecken und Ziehen des ummantelten Leiters in ein ausgerichtetes Erzeugnis umgewandelt wird.Insulating sheath for electrical conductors and process for their manufacture It is known, electrical conductors with synthetic, long-chain linear condensation polyamides to be sheathed as insulating material by moving the conductor through molten polymers and the coating by cold stretching and drawing the covered conductor into alignment Product is converted.
Der gestreckte Schmelzüberzug neigt ähnlich wie der nur gereckte Schmelzfaden infolge der molekularen I;ängsorientierung zum Längsspleißen, die Hülle spaltet oft schon bei geringer mechanischer Beanspruchung und bei höheren Temperaturen in der I,ängsrichtung auf, da der molekulare Querverband unzureichend ist.The stretched melt coating has a tendency similar to that of the only stretched melt thread As a result of the molecular longitudinal orientation for longitudinal splicing, the cladding splits often with low mechanical stress and at higher temperatures in the I, in the longitudinal direction, because the molecular cross-link is inadequate.
Auch ist der Vorschlag gemacht worden, ein vielfädiges Bündel aus schmelzgesponnenen Polystyrolfäden auf einem voreilenden, elektrischen Leiter zu verseilen. Bei der fädigen Umseilung fehlt den nur gereckten Fäden und den nebeneinanderliegenden, verseilten Fäden der Querverband. The suggestion has also been made of a multifilament bundle melt-spun polystyrene threads on a leading electrical conductor strand. In the filamentous roping, the only stretched threads and the adjacent, stranded threads of the cross bracing.
Die Isolierhülle der Erfindung zeigt keine Neigung zum Spleißen und Aufplatzen in der Längsrichtung. The insulating sleeve of the invention shows no tendency to splice and Splitting lengthways.
Die Isolierhülle besteht aus einem durch schraubige Verwindung vor dem Erhärten oder Koagulieren spleißfest gemachten Hohlfaden aus fadenbildenden, synthetischen Kunststoffen. Bei der beispielsweisen Anwendung von Polykondensaten oder Polymerisaten als isolierender Spinnstoff sind die durch Recken in der Vorbereitung und/oder beim Spinnen längs orientierten Fadenmoleküle zur Verbesserung des Querverbandes des Hohlfadens durch die Drehung des Hohlfadens schraubenlinig und schräg gerichtet.The insulating sleeve consists of a screwed twist in front the hardening or coagulation made of hollow fibers made of thread-forming, synthetic plastics. When using polycondensates, for example or polymers as insulating textile materials are being prepared by stretching and / or longitudinally oriented thread molecules during spinning to improve the cross-bond of the hollow fiber is directed helically and obliquely by the rotation of the hollow fiber.
Die schraubige Schräglage der Fadenmoleküle und der Molekülketten verbessert den beim Recken geschwächten Querverband erheblich, ohne daß der ungehärtete Hohlfaden beim Verwinden in der Querwichtung übermäßig beansprucht wird.The helical inclination of the thread molecules and the molecular chains considerably improves the transverse bond, which is weakened during stretching, without the uncured Hollow thread is excessively stressed when twisting in the transverse weighting.
Nach dem Verfahren der Erfindung zur Herstellung d .r Isolierhülle wird der Leiter durch die Mitte einer Ringdüse gezogen und mit einem aus der Ringdüse fließenden Hohlfaden überzogen. Beispielsweise wird der aus der Ringdüse ausgepreßte Hohlfaden aus Polykondensaten oder aus Polymerisaten nach dem Schmelzspinnverfahren oder bei der Anwendung eines Lösungsmittels nach dem Naßspinnverfahren gesponnen. Der durch die Mitte der Ringdüse und somit durch die Mitte des Hohlfadens gezogene Leiter nimmt den anhaftenden Hohlfaden mit und reckt ihn vor dem Zusammentreffen mit dem Draht durch Voreilung des Drahtabzuges und verwindet ihn gleichzeitig durch die axiale Drehung des Leiters. According to the method of the invention for producing the insulating sleeve the conductor is pulled through the middle of a ring nozzle and with one out of the ring nozzle flowing hollow thread covered. For example, the one pressed out of the ring nozzle Hollow filaments made from polycondensates or from polymers using the melt spinning process or spun by the wet spinning process when a solvent is used. The one drawn through the center of the ring nozzle and thus through the center of the hollow fiber Head takes the attached hollow thread with him and stretches it before it meets with the wire by leading the wire take-off and twisting it through at the same time the axial rotation of the conductor.
Der Durchmesser des dünnwandigen Hohlfadens ist am Düsenmund erheblich größer als der I)rahtdurchmesser; der Hohlfaden verengt sich beim Recken und Verwinden kegelförmig verlaufend zur Abzugsrichtung und schmiegt sich zur Umhüllung und Haftung an die Oberfläche des Leiters an. Der den Querverband des Hohlfadens festigende Drehungsgrad wird von der Drehzahl und der Abzugsgeschwindigkeit des Leiters bestimmt, außerdem von der Weglänge des Hohlfadens zwischen dem Düsenmund und dem Punkt des Zusammentreffens mit dem Leiter und somit von der Zeitdauer, die zum Recken und Verwinden des Hohlfadens erforderlich ist.The diameter of the thin-walled hollow thread is considerable at the nozzle mouth larger than the I) wire diameter; the hollow thread narrows when it is stretched and twisted running conically to the direction of withdrawal and nestles up to cover and adhesion to the surface of the conductor. The one that strengthens the cross bond of the hollow fiber The degree of rotation is determined by the speed and the withdrawal speed of the conductor, also on the path length of the hollow fiber between the nozzle mouth and the point of the Meeting with the leader and thus on the length of time it takes to stretch and Twisting of the hollow fiber is required.
Die Weglänge zum Spinnen und Recken des Hohlfadens wird erfindungsgemäß vergrößert durch die Anwendung eines bekannten, hohlkegeligen Spinndornes, der in der Mitte der Ringdüse ortsfest und drehbar gelagert ist und über den der Hohlfaden beim Recken und Spinnen in sich verengernder Form zum Leiter gleitet. Um ein Haften des klebenden Hohlfadens an der Außenfläche des Spinndornes zu verhindern, wird der Dorn erfindungsgemäß erwärmt. The path length for spinning and stretching the hollow fiber is according to the invention enlarged through the use of a well-known, hollow-conical spinning mandrel, which is used in the center of the ring nozzle is fixedly and rotatably mounted and over which the hollow thread slides towards the ladder in a narrowing shape when stretching and spinning. To a sticking to prevent the adhesive hollow thread on the outer surface of the spinning mandrel the mandrel is heated according to the invention.
Zur Unterstützung des Spinnvorganges erhält der Spinndorn erfindungsgemäß eine kreisende Bewegung und somit der Hohlfaden durch die mitnehmende Wirkung der Außenfläche des kreisenden Spinndornes eine Drehung. Die Abhängigkeit der Festigkeit des Hohlfadens vom Drehungsgrad verläuft nach den bekannten Gesetzen, die für die Faserverspinnung gelten. According to the invention, the spinning mandrel is provided to support the spinning process a circular movement and thus the hollow thread due to the entrainment effect of the Outer surface of the rotating spinning mandrel one rotation. The dependence of strength of the hollow fiber from the degree of twist runs according to the known laws that apply to the Fiber spinning apply.
Die abgestumpfte Kegelform des Spinndornes entspricht in der Länge der Mantellinie des Kegels, der Weglänge des spinnenden Hohlfadens, und der Grundkreis des Kegelstumpfes etwa dem Durchmesser des kreisförmigen Schlitzes der Ringdüse, während die parallele Schnittfläche etwa dem Durchmesser des Leiters entspricht, ebenso die Bohrung des hohlkegeligen Spinndornes. The truncated conical shape of the spinning mandrel corresponds in length the surface line of the cone, the path length of the spinning hollow fiber, and the base circle of the truncated cone approximately the diameter of the circular slot of the ring nozzle, while the parallel cut surface corresponds approximately to the diameter of the conductor, likewise the bore of the hollow conical spinning mandrel.
Die Ummantelung mit einem gereckten und gesponnenen Hohlfaden kann beliebig wiederholt werden, und erfindungsgemäß wechselt die Richtung der Spinndrehung des Hohlfadens in den Mantelschichten. The sheathing with a drawn and spun hollow thread can can be repeated as desired, and according to the invention the direction of the spin rotation changes of the hollow fiber in the cladding layers.
Nach der Ummantelung wird der Hohlfaden, wenn er aus Polykondensaten oder aus Isunststoffen mit ähnlichen Eigenschaften gesponnen ist, zur Verhärtung in bekannter Weise getempert. I)urch Einwirkung von Feuchtigkeit und Hitze wird auch eine Schrumpfung und somit eine verengte Ummantelu ng der Hohlfadenschicht bewirkt. After the sheathing, the hollow fiber, if it is made of polycondensates or is spun from synthetic materials with similar properties to harden annealed in a known manner. I) by the action of moisture and heat also a shrinkage and thus a narrowed sheathing of the hollow fiber layer causes.
PATENTANSI)RI <II F: 1. Isolierhülle für elektrische Leiter aus fadenbildenden, synthetischen Kunststoften (Polykondensaten oder Polvmfrisatcn), dadurch gekennzeichnet, daß der den Leiter als isolierender Uberzug ummantelnde, gereckt Hohlfaden schraubig verwunden ist. PATENTANSI) RI <II F: 1. Insulating cover for electrical conductors thread-forming, synthetic plastics (polycondensates or pile frizatcn), characterized in that the conductor sheathed as an insulating coating, stretched hollow fiber is helically twisted.
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES20873A DE835467C (en) | 1950-11-14 | 1950-11-14 | Insulating sleeves for electrical conductors and processes for their manufacture |
DES24117A DE899057C (en) | 1950-11-14 | 1951-07-25 | Process for the production of insulating sleeves for electrical conductors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES20873A DE835467C (en) | 1950-11-14 | 1950-11-14 | Insulating sleeves for electrical conductors and processes for their manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
DE835467C true DE835467C (en) | 1952-03-31 |
Family
ID=7476213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES20873A Expired DE835467C (en) | 1950-11-14 | 1950-11-14 | Insulating sleeves for electrical conductors and processes for their manufacture |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE835467C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE962719C (en) * | 1953-10-08 | 1957-04-25 | Huels Chemische Werke Ag | Stretched shapes seamlessly sheathed with thermoplastics |
DE1141773B (en) * | 1955-02-07 | 1962-12-27 | Osnabruecker Kupfer Und Draht | Process for sheathing an elongated, bendable object with a seamless hose cover made of a sproed material that can be made flexible by stretching and using a drawing tool when performing the process |
-
1950
- 1950-11-14 DE DES20873A patent/DE835467C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE962719C (en) * | 1953-10-08 | 1957-04-25 | Huels Chemische Werke Ag | Stretched shapes seamlessly sheathed with thermoplastics |
DE1141773B (en) * | 1955-02-07 | 1962-12-27 | Osnabruecker Kupfer Und Draht | Process for sheathing an elongated, bendable object with a seamless hose cover made of a sproed material that can be made flexible by stretching and using a drawing tool when performing the process |
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