DE7110782U - Wound capacitor, in particular flat wound capacitor - Google Patents

Description

Patent Attorneys Dipl.-JIrjrc ^ FrWEiQKMA ₁ NN, «|

DiPL.-InG. H-'WErCKMA-NNVT ^ lPL.-PHYS. Dr. K. FlNCKE

Dipl.-Ing. F. A. Weickmanw, Dipl.-Chem. B. Huber

SGBI

Ernst Roederstein

Speζia! Fabrik für 8 München 86, February 1st, 1973

Capacitors GmbH P.O. Box 86o82o

D * _r -, A ienneVmT MDHLSTR ASSE 22. CALL NUMBER 48 19 21/22 OpUU Lanasnu-c <9S392: / 22>

Ludmillastr. 23/25

Winding capacitor and process for its manufacture

The invention relates to a wound capacitor, in particular Flat wound capacitor in metal foil-plastic foil design or made of metallized plastic films, with a winding, perpendicular to the winding axis on opposite sides End faces of the coil contacted connecting wires and means for their additional attachment the wrap. The invention also relates to a method for producing such a wound capacitor.

It is for one

Such a wound capacitor has already been proposed that the winding and the parts lying on the end faces the connection width at least partially from a shrunk on the end faces over the connection wires running, circumferential plastic jacket are surrounded. This results in a safe one with simple means additional fastening of the connecting wires on the winding.

The wound capacitor is preferably a flat wound capacitor formed with approximately elongated end faces and two opposite, flat longitudinal sides, since then the plastic jacket runs over both front sides and the two flat long sides and opposite the case of a round one Cross-section has a better possibility of being flat and tightly fitting over the parts lying on the end faces to tension the connecting wires.

The invention is based on the object of improving a wound capacitor according to the main patent so that while maintaining it the possibility of simple mass production a particularly high mechanical strength is achieved.

According to the invention, the object is achieved with a wound capacitor of the type mentioned at the beginning with the embodiments mentioned according to the main patent in that the Inside of the plastic jacket is connected at least in partial areas to the outside of the roll.

By the measure according to the invention it is achieved that the plastic jacket after its shrinking and after his Connection with the coil can practically no longer yield elastically and therefore the connecting wires and the coil holds together in a particularly reliable way.

A layer of this adhesive can be provided between the inside of the plastic jacket and the outside of the roll be ,, or the inside of the plastic jacket can be sintered or fused to the outside of the coil.

According to one embodiment, the plastic jacket consists of two layers that are inseparably connected to one another Plastic film, at least the outer layer being shrinkable, while the inner layer is suitable for gluing, Sintering or melting is used. On the other hand, the roll can also have a separately applied outer layer,

which in this · way to connect with the inside of the Plastic jacket is used.

The method of manufacturing the new wound capacitor is as follows _; that, in the manner already proposed in the main patent, the coil and the parts of the connecting wires lying on the end faces are at least partially surrounded by a shrinkable film and this is shrunk on by heat treatment and that, on the other hand, the inside of the film is additionally connected at least in parts to the outside of the coil .

To carry out the method, a film can be used which consists of two layers connected to one another, of which at least the outer one is shrinkable and of which the inner one is used to connect to the outside of the coil. Instead or in addition, the wrap can be used Before the film is shrunk on, an outer layer is provided that connects to the inside of the film serves. This outer layer can be applied by dipping or by spraying.

Either the inner layer of the film or the outer layer of the roll can consist of an adhesive.

To enable production in a single operation, which is only slightly longer than the production according to the main patent achieve, the connection of the inside of the film with the outside of the roll is preferably carried out after shrinking of the film by required temperature treatment. Is according to an adhesive is provided for one of the aforementioned types of procedure, an adhesive that hardens in the heat is then preferably used. On the other hand, by the temperature treatment sintering or melting can also be achieved.

The invention is explained in more detail below with reference to the drawings

er-1; iute ι · 1. i · .κ ze i / ·; eη:

■ if. i fine: i flat wound capacitor according to the main patent, to which the invention is applicable;

2 shows a partial cross section through the wound capacitor according to FIG. 1.

The flat wound capacitor shown in FIG. 1 is a metal foil-plastic foil version or a capacitor made of metallized plastic films. It has a Y / ickel 20 with long, rounded end faces 21, flat long sides 22 and rounded long sides 23. Connection wires 24 are contacted on the end faces 21. Around The winding 20 is an auo shrinkable plastic existing tape 30 laid around so that it is over the end faces 21 and the parts of the connecting wires lying on it 24 runs, and shrunk. The band 30 can be formed beforehand, for example, by dividing a seamless tube be. After it has been shrunk on, it holds the parts of the connecting wires 24 lying on the end faces 21 on the End faces 21 fixed.

The band 30 forms only the simplest form of a plastic jacket, the winding 20 in other embodiments as well can be surrounded more extensively and can in particular be designed as a complete envelope.

In the cross-section partially shown in FIG. 2, part of the roll 20 is provided with metallized foils 50 and one this surrounding plastic layer 51 can be seen. On the The plastic film, in the present case the tape 30, is shrunk onto the outside of the roll 20. Between the Outer layer 51 of the roll 20 and the tape 30 is in one Zone 52 established a permanent connection by gluing, sintering or melting.

Claims (16)

■ Α N S PRii C HE 1.Wound capacitor, especially flat-wound capacitorin MetallfolienyKunototoffolien execution or made of metallized Plastic films, with a roll, perpendicular to the roll axis on opposite end faces of the roll contacted connecting wires and means for their additional attachment to the coil the \ vickel and the Parts of the connecting wires lying on the end faces at least partially from a shrunk onto the end faces About the connecting wires running, circumferential plastic sheath • are surrounded, characterized in that the Inside of the plastic jacket (30) is connected to the outside of the roll (20) at least in some areas. 2. wound capacitor according to claim 1, characterized in that between the inside of the plastic jacket (30) and a layer (52) of an adhesive is provided on the outside of the roll (20). 3. wound capacitor according to claim 1, characterized in that that the inside of the plastic jacket (30) on the outside of the winding (20) is sintered. 4. wound capacitor according to claim 1, characterized in that the inside of the plastic jacket (30) on the outside of the roll (20) is melted. 5. wound capacitor according to one of the preceding claims, characterized in that the plastic jacket (30) consists of a plastic film having two inextricably linked layers, that at least the outer layer is shrinkable and that the inner layer is used to connect to the outside of the roll (20). - O - 6. wound capacitor according to one of the preceding claims, characterized in that the roll (20) has a separately applied outer layer (51), which is connected to the inside of the plastic sleeve (30) is connected. 7. wound capacitor according to claim 1, in which the winding and the parts of the connecting wires lying on the end faces nindest are partially surrounded by a shrunk film, dadurc :. characterized in that the inside of the film is at least partially connected to the outside of the roll. 8. wound capacitor according to claim 7, characterized in that the film consists of two interconnected layers, of which at least the outer one is shrinkable and of which di inner is connected to the outside of the coil. 9. wound capacitor according to claim 7 or 8, characterized in that that the winding is provided with an outer layer which is connected to the inside of the film. 10. Vickel capacitor according to claim 9, characterized in that the outer layer is a Tauchschiclit. 11. wound capacitor according to claim 9, characterized in that di ' The outer layer is a spray layer. 12. wound capacitor according to claim 8, characterized in that the inner layer consists of an adhesive. 13. wound capacitor according to one of claims 9 to 11, characterized in that the outer layer consists of an adhesive. 7110762206.73 14. wound capacitor according to one of claims 12 or 13, characterized Glue is. U ¹ ι VACiIJ U ^ A IVXV I ^ \ ^ J. υχϋ X 15. wound capacitor according to one of the preceding claims, characterized characterized in that the inside of the film is sintered to the outside of the roll. 16. wound capacitor according to one of the preceding claims, characterized characterized in that the inside of the film is fused to the outside of the roll.