DE1479087C

DE1479087C - Device for the pretreatment of tubes to be printed in an electric field between electrodes immediately following an extruder mouth

Info

Publication number: DE1479087C
Authority: DE
Inventors: Holger 2071 Hamfelde Bille
Original assignee: Softal Electronik Gmbh, 2000 Hamburg
Publication date: 1972-11-02

Description

kennzeichnet, daß die Bewegung der Außenelektroden über einen Hubmagneten erfolgt.indicates that the outer electrodes are moved by a lifting magnet.

getragen werden, der zweckmäßig mittels eines Elektromotors mit Reibrad angetrieben ist.be worn, which is expediently driven by means of an electric motor with a friction wheel.

7. Vorrichtung nach Anspruch 6, dadurch ge- 35 kennzeichnet, daß die Spannungszuführungen über am äußeren Ring vorgesehene Kontakte und ferner über Schleifkontakte zu den Elektroden erfolgen. 7. Apparatus according to claim 6, characterized in that the voltage supplies via contacts provided on the outer ring and also via sliding contacts to the electrodes.

8. Vorrichtung nach einem oder mehreren der 40 Kohlenstoff herzustellen.8. Manufacture device according to one or more of the 40 carbon.

vorangehenden Ansprüche 2 bis 7, dadurch ge- Die Außenelektrode kann auch aus einem Flachmaterial hergestellt sein, und die Außenelektroden können feststehend oder drehbar angeordnet sein, wobei letzteres sich bei hoher Ausfrittsgeschwindig- - 45 keit des Schlauches aus dem Extruder empfiehlt.preceding claims 2 to 7, characterized in that the outer electrode can also be made of a flat material be made, and the outer electrodes can be fixed or rotatable, The latter is recommended at high Ausfrittsgeschwindig- - 45 speed of the hose from the extruder.

Die F i g. 2 und 4 zeigen ein AusführungsbeispielThe F i g. 2 and 4 show an embodiment

für eine Vorrichtung mit rotierenden Außenelektroden. Der innere lose Isolierring 8 trägt die aus Flach-for a device with rotating external electrodes. The inner loose insulating ring 8 carries the flat

Die Erfindung betrifft eine Vorrichtung zur Vor- material hergestellten Elektroden 9. Er läuft in den behandlung von zu bedruckenden Schläuchen in 50 äußeren Ringen 10 aus Isoliermaterial und wird beieinem elektrischen Feld zwischen Elektroden unmit- spielsweise mittels eines Elektromotors mit Reibrad telbar im Anschluß an eine Extrudermündung. 11 angetrieben. Die Zahl der Elektroden 9 kann einThe invention relates to a device for electrodes 9 produced from the starting material treatment of tubes to be printed in 50 outer rings 10 made of insulating material and becomes one electric field between electrodes, for example by means of an electric motor with a friction wheel directly connected to an extruder mouth. 11 driven. The number of electrodes 9 can be

Es ist bereits bekannt, ein besseres Haften von beliebiges Vielfaches von 2 sein.It is already known to be a better sticking of any multiple of 2.

Druckfarbe auf Kunststoffolien durch eine Vorbe- Die Spannungszuführungen sind zweckmäßig anPrinting ink on plastic foils by means of a pre- The voltage supply lines are useful

handlung dieser Folien zu erzielen, bei der die Folien 55 den äußeren Ringen 10 angeordnet und werden über über Walzen geführt und einem elektrischen Feld Schleifkontakte an die Elektroden 9 geführt,
zwischen zwei Elektroden ausgesetzt werden, die zu Soll die Oberfläche der> Kunststoffschlauches nurTo achieve treatment of these foils, in which the foils 55 are arranged on the outer rings 10 and are passed over rollers and an electrical field is passed to the electrodes 9, sliding contacts,
between two electrodes, which should be exposed to the surface of the> plastic tube only

beiden Seiten der Fplie oder aber an der gleichen Sei- partiell vorbehandelt werden, so kann der Antriebste derselben angeordnet sein können. In beiden Fäl- motor für die Außenelektroden durch einen Hublen tritt durch Entladungsvorgänge die gewünschte, 60 magneten ersetzt werden, der dann die Elektrodendas Ifalten der Druckfarbe begünstigende Beeinflus- halter mit einer für diese Teilvorbehandlung passensung der Folienoberfläche ein. den Elektrode bewegt.are partially pretreated on both sides of the plate or on the same side, the drive part of the same can be arranged. In both cases, the motor for the outer electrodes by a Hublen passes through discharge operations, the desired magnet 60 to be replaced, then the I Elektrodendas fold favoring the ink influencing holder with a pretreatment for this part of the film surface passensung a. moves the electrode.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Patent claims:

1. Device for the pretreatment of tubes to be printed in an electrical Field between electrodes immediately following an extruder mouth, thereby characterized in that a core protruding from the center of the extruder mouth is an internal electrode forms and around the exiting

However, these known devices are not applicable with endless hoses, because such bodies. cannot be flattened enough to get a Effectiveness of the aforementioned electrical treatment can be achieved.

The invention is based on the object of making it possible in a structurally simple manner the plastic hoses emerging from the extruder successfully carry out the electrical pretreatment

Run the hose around one or more external electri-
trode at such a distance from the This object is achieved according to the invention

Hose surface are arranged that this releases that one from the center of the extruder mouth

protruding core forms an inner electrode and one or more

exposed to electrical discharges.

2. Apparatus according to claim 1, characterized in that the outside of the hose 15 rere external electrodes at such a distance outer electrode made of a non-metal! - Are arranged from the hose surface that see conductors, for. B. graphite or carbon, this is exposed to electrical discharges.
consists. The advantage of the invention is that too

3. Device according to claim 1, characterized by the fact that thick-walled hoses are handled properly. that an annular outer electrode 20 can and no difficulties arise, trode is provided. when the exit speed of the hose

4. Apparatus according to claim 1, characterized in that the extruder mouth is relatively large indicates that the outer electrode is made of flat.

material consists. The F i g. 1 and 2 of the drawing each show one

5. The device as claimed in claim 1, characterized in that it is a section along and across the tube axis. From the indicates that the outer electrode or the mouth of the extruder head 1 protrudes from the core 2-outer electrodes rotatable around the mouth. This protruding part 3 forms the inner scythe of the extruder are arranged. electrode. The outer electrode is a perforated disk 4,

6. Apparatus according to claim 5, characterized in that the hose 6 passes through the opening 5 thereof. The Ink indicates that the outer electrodes of 30 ndiameter of the perforated disk 4 is larger than that one rotatable in two fixed outer diameters of the hose 6. For better Rings made of insulating material arranged inner ring handling is the outer electrode 4 from two or

composed of several parts. The voltage is supplied via line 7.

It has been found to achieve a more even distribution of the discharges over the area to be treated Surface of the hose has proven to be useful, the outer electrode or the outer electrodes a non-metallic conductor such as graphite or