DE1704138A1 - Process for applying a thin film to a molding strand - Google Patents
Process for applying a thin film to a molding strandInfo
- Publication number
- DE1704138A1 DE1704138A1 DE19671704138 DE1704138A DE1704138A1 DE 1704138 A1 DE1704138 A1 DE 1704138A1 DE 19671704138 DE19671704138 DE 19671704138 DE 1704138 A DE1704138 A DE 1704138A DE 1704138 A1 DE1704138 A1 DE 1704138A1
- Authority
- DE
- Germany
- Prior art keywords
- film
- applying
- strand
- molding
- hose
- 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
-
- 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
-
- 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
- B29C63/48—Preparation of the surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
Verfahren zum Aufbringen einer dünnen Folie auf einen Formstrang Bei den meisten Verfahren werden die Polien mittels sogenannter Wickler einzeln oder niehrfach um den Formstrang wendelförmig aufgebracht. Diese Verfahren haben aber den wesentlichen Nachtei. daß Schwungmassen in Umlauf gebracht werden, für die starke und zum Teil auch recht komplizierte Maschinen erforderlich sind. Process for applying a thin film to a molding strand In most procedures, the poles are made individually using so-called curlers or never applied helically around the molding strand. Have these procedures but the main disadvantage. that centrifugal masses are brought into circulation for which require strong and sometimes very complicated machines.
Man versucht daher im zunehmenden Maße eine Längsbedeckung der Formstrenge vorzunehmen, die, obwohl hirr Schwierigkeiten anderer Natur auftreten, bei dünnen Folien mit Vorteil angewendet werden kann.Attempts are therefore increasingly being made to cover the strictness of the form longitudinally to undertake which, although difficulties of a different nature arise, with thin ones Foils can be used with advantage.
Ein Nachteil dieses Verfahren ist aber die Tatsache, daß eine lvngsaufgebrachte Folie, im Gegensatz zu einer wendelförmig aufgebrachten, nicht an dem Formstrang haften bleibt, so daß sie z. B. durch eine Bandage festgehalten werden muß. Um diesen notwendigen Arbeitsgang zu sparen, idt zum teil versucht worden, die Umspritzung der nachfol enden Umhüllung des Formstranges möglichst unmittelbar hinter die Einlaufstelle der Folie zu bringen, so daß der gespritzte Kunststoff die Folie gegen den Formstrangkern drückt.A disadvantage of this method, however, is the fact that an elongated In contrast to a helically applied film, it is not attached to the molded strand remains attached so that they can be used for. B. must be held in place by a bandage. To this one To save the necessary work step, attempts have been made in part to encapsulate the subsequent wrapping of the molding strand as immediately as possible behind the inlet point to bring the film, so that the injection-molded plastic the film against the molded strand core presses.
Gegenstand der vorliegenden Erfindung ist ein Verfahren zum Aufbringen einer Folie auf einen Formstrang mit elektrisch nicht leitender Oberfläche, bei dem die Folie zunächst elektrostatisch aufgeladen und danach auf den Formstrang aufgebracht wird, so daß sie sich durch die elektrostatischen Kräfte an den Formstrang schlauchartig schmiegt.The present invention relates to a method of application a film on a molded strand with an electrically non-conductive surface which the film is first electrostatically charged and then onto the molding strand is applied so that it is attached to the molding strand by the electrostatic forces hugs like a hose.
Di elektrostatische Aufladung der Folie erfolgt mittels einer Kunststoffrolle, über welche die Folie gefillirt wird. Hierbei muß die Abzugsgeschwindigkeit der Folie von der Umlaufgeschwindigkeit der Rolle abweichen, damit durch die auftretende Relativbewegung Reibung entsteht und die Folie genügend elektrostatisch aufgeladen wird, um vom Formstrang angezogen zu werden.The film is electrostatically charged by means of a plastic roller, over which the film is filled. The withdrawal speed must be the Foil deviate from the rotational speed of the roll, thus due to the occurring Relative movement Friction arises and the film is sufficiently electrostatically charged becomes to be attracted to the molding strand.
Zur Unterstützung der Folienverformun@ aient eine Fährung aus elektrisch isolieren em Material, auf der die Folie gleiten und gleichzeitig zu einem längslaufenden Hohlzylinder gebogen erden karl.In order to support the foil deformation, a guide from electric isolate em material on which the slide slide and at the same time become a longitudinal Hollow cylinder curved earth karl.
In Wirklichkeit so#en sich bei der Verformung der Folie zum Schlauch die beiden sich überlappenden Kanten ab, da sie gleiches Iotential aufweisen. Da es sich aber um sehr kleine elektrostatische Kräfte handelt, ist diese Erscheinung nicht von gro#er Bedeutung, zumal im folgenden Bearbeitungsgang ( z. B. Ummantelung) die Folie ge en den Formstrang gepreßt wird.In reality, when the film is deformed, it becomes a tube the two overlapping edges, since they have the same potential. There but it is a matter of very small electrostatic forces, this is the phenomenon not of great importance, especially in the following processing step (e.g. sheathing) the film ge en the molding is pressed.
Als Folie, die eine genügend elektrostatischv Aufladung aufnehmen, und deshalb genügend stark vom Formstrang angezogen werden können, sind KunststoffSolien, vorzugsweise aus Polyterephtalsäureester, deren Dicke bis einige Zehn-telsbetragen, besonders geeignet.As a film that absorbs a sufficient electrostatic charge, and can therefore be attracted sufficiently by the molded strand, are plastic foils, preferably made of polyterephthalic acid ester, the thickness of which is up to a few tenths, particularly suitable.
Das erfindungsgemäße Verfahren eignet sic vorzüglich zum Aufbringen einer Folie auf einen mit einem Korrosionsschutzmacntel beschichteten metallischen Mantel eines elektrischen Kabels, oder einer Folie, die die Weichmacherwanderung zwischen zwei Schichten verhindern soll.The method according to the invention is particularly suitable for application a foil on a metallic coated with a corrosion protection coat Sheath of an electrical cable, or film, that prevents plasticizer migration to prevent between two layers.
In der schematischen Darstellung von Figur 1 wird das Verfahren näher erläutert.The method is shown in more detail in the schematic representation of FIG explained.
In der Figur 1 ist 1 die Folie, die aus der Spule 2 abgewickelt wird und durch die Reibungsrolle 3 elektrostatisch aufgeladen wird. Durch die Führung 4 wird die Folie zu einem Halbzylinder gebogen und schmiegt sich an der Stelle 5 senlauchartig um den Formstrang. x: MillimeterIn FIG. 1, 1 is the film that is unwound from the reel 2 and is electrostatically charged by the friction roller 3. Through the leadership 4, the film is bent into a half cylinder and nestles at point 5 like a mustard around the molding strand. x: millimeter
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK0061934 | 1967-04-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1704138A1 true DE1704138A1 (en) | 1971-05-06 |
Family
ID=7230342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19671704138 Pending DE1704138A1 (en) | 1967-04-07 | 1967-04-07 | Process for applying a thin film to a molding strand |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1704138A1 (en) |
-
1967
- 1967-04-07 DE DE19671704138 patent/DE1704138A1/en active Pending
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