DE8536791U1 - Embossing machine for an insulating film for the layer winding of a transformer - Google Patents

Description

Siemens Aktiengesellschaft Our mark

Berlin and Munich VPA 85 G 1 9 O 6 DEQ

Embossing machine for an insulating film for the layer winding of a transformer Z ^

The innovation relates to an embossing machine for an insulating film, which is used for the layer winding of a transformer, is ribbed in particular in the area of the edges and in which the ribbing of the otherwise flat film on the edge a relatively small width (L) compared to the layer width (B) as a nub (N) with about the wire duv: yh knife adapted NockenlrJhe (H) is carried out, which the width the layer winding (W2) limited to the flat area of the film.

The safe electrical separation of the power circuit from the telecommunications circuit requires depending on the one to be used VDE regulation different air and creepage distances between the primary and secondary winding of a transformer. The creepage distances between the primary and secondary winding of a small transformer are depending on Production quantities, voltage level and VDE regulation achieved in different ways.

Well-known procedures are:

Indentation of the windings and filling of the gap to the bobbin flange with twine or foil; Indent of the windings by inserted spacer rings or by specially shaped bobbins, compliance with the Creepage distances due to foils standing up on the edge of the coil body (e.g. G 82 05 767.2), compliance with creepage distances Multi-chamber bodies or by pushing bobbins into one another, etc.

Gz 1 Phl-Buh / 03/26/86

- 2 - VPA 85 G 190 6 DEOI

In the parallel application G 85 35 658.1 a film proposed, which is carried out ribbed in particular in the area of the edges, designed such that the ribbing the otherwise flat film at the edge to a relatively small width compared to the layer width as a nub approximately the wire diameter adapted cam height is carried out, which the width of the layer winding on the flat Limited to the area of the slide.

The innovation is based on the task of a machine to |

Specify the manufacture of such a film. |

This object is achieved according to the innovation in the surfaces in the number plate] of claim 1 mentioned kind. ί

is j:

The innovation is explained in more detail below with reference to figures. Figures 1 and 2 serve to explain tion of the film to be produced with the machine *

Figure 1 shows the coil body partially cut open. Figure 2 shows the profile of the insulating film. FIG. 3 shows the machine for producing the film.

The film, which can also be winding or layer insulation at the same time, allows the winding to be indented in a defined manner and prevents the winding wire from slipping sideways or off, even with a small winding circumference. With this film, the winding structure remains stable and easy to cast.
30th

The film takes on the appearance as shown in Figure 1 in different views. In Figure 2 is an associated one Winding structure shown. The film has knobs N on both sides with a height H adapted to the wire diameter and a length L adapted to the insulation conditions to increase the leakage current path in the direction of the coil body K.

- 3 - VPA 85 G1 90 6 OE01

As shown, for example, you can alternate between the individual windings with smooth Folidi GF Wl ... W3 are wrapped or with continuous dimpled foils in every layer if necessary. the Knobs are sufficiently stable even for the latter case.

The embossing device proposed herein for producing the insulating film is shown in FIG. 3. It allows foils one rlon ΐΛίατΊ / ϋ + · nffon 7iim Roicniol PnluinHri. Pnlurarhnnat.

uww wwii tw- riw «. w ι ■ s »ι ·, --—... ~ w -., ^ - - -. ——Y _... - _ j. ~ - j _____..__, polyethylene terephthalate with a thickness of 0.05 to 0.125 mm, a width B of 6 to 100 mm and embossed on both sides with different heights H (0.2 to 1 mm) and a length L (1st floor) up to 4.5 mm) inexpensive to manufacture. The embossing distance can be varied depending on the requirements.

The basic body of the device is formed by two plates 23, which are joined together by spacer bolts 22 and a cross member 11 are connected. The geared motor 19 is fastened on a front plate, not shown. He drives an eccentric shaft 17 via a toothed belt 18. This is then followed by a single-stage gear transmission both via the toothed belt 20, a feed roller 4 and via the toothed belt 15 and one not shown slip clutch a winding drum 14 driven.

On a cross member 11 there are two supports 10, one of which is screwed to the cross member while the other can be displaced on the cross member by means of a spindle and can therefore be adjusted to the respective film width is. Embossing tool carriers 6 are arranged on the supports 10 so as to be displaceable transversely to the foil feed attached. In addition, 5 guided tours are available on the supports.

S 11

- 4 - VPA 85 G 1 9 O 6 OE01

arranged, which ensure the defined position of the film in the embossing area. By moving the Prägewerkzeug- h träfer 6, the Lange changing the embossing.

A die 8 fastened in the upper fixed part of the embossing tool carrier 6 can be moved by means of the knurled screw 7 adjust in the vertical direction, whereby the height of the embossing can be adjusted. In a lower, movable one The stamp is part of the embossing tool carrier 6

iö housed with die 9 . The vertical stroke movement is generated by the eccentric shaft and transmitted via the roller 16 to the moving part of the embossing tool carrier.

The film to be embossed is of a supply roll 1 axially fixed on the tube 25 through the guide 2, a Feed roller 4 and a pressure roller 3 out. The pressing force necessary for the foil advance is generated by pressure springs 21 generated and transferred by the lever 24 to the pivotably mounted pressure roller 3. From the feed roller 4, which is continuously driven at constant speed, the film is through the embossing station led. Builds up during embossing the film between the feed roller 4 and the embossing station and is through immediately after being released Tension pulley 12 tensioned smoothly.

The embossed film is frictionally connected to the drum 14 connected roll 13 wound. 3Ö '

3 protection claims
J 'figures

35

Claims (3)

■ «* ■■ * · * · I - 5 - VPA 85 G 190 6DE0 1 Protection claims 1. Embossing machine for an insulating film, which is used for the layer winding of a transformer, especially in the field the edges are ribbed and in which the ribbing of the otherwise flat film on the edge is relatively small Width (L) compared to the layer width (B) as a nub (N) with a cam height adapted approximately to the wire diameter (Hj is executed, which limits the width of the layer winding (W2) to the flat area of the film, characterized in that an embossing machine is provided for the nubs on the film is that between the feed devices with unwinding (1) and take-up roll (13) an adjustable Embossing tool has, which consists of an eccentric moving punch with die (9) and a fixed above it Support (10), which carries the counter die and in which the feed device (4) with the punch of the Embossing device is connected by a slip-free drive, preferably by means of a toothed belt (20). 2. Embossing machine according to claim 1, characterized in that the support 10 is divided into two parts and one against the the other part is displaceable by means of a spindle drive transversely to the film feed to adjust the film width. 3. Embossing machine according to Claim 2, characterized in that embossing tool carriers 6 are fastened to the supports 10 and contain the counter die 8 which can be adjusted in the vertical direction by means of knurled screw 7. 35