JPS6153713A - Taping machine - Google Patents

Abstract

PURPOSE:To tape in succession to the process of a strip member while a tape is folded to an edge of the strip member by passing the adhesive tape through a die which an entrance angle is obtuse and an exit has a narrow channel from the edge face with a pressing roller. CONSTITUTION:When single adhesive insulating tapes 7 and 8 are taped to the edges of a strip conductor 3 of a taping machine, bonding tapes drawn from tape hoops 9 and 10 wound on a single side with an adhesive tape is pressure from end directions b1 and b2 of each strip conductor 3 with edge pressing rollers 11 and 12. The tapes 7 and 8 sent by the movement of the strip conductor 3 are passed through V channel forming dies 13 and 14 in which an angle of an entrance 14A is obtuse, an angle of an exit 14B is sharper than that of the entrance 14A and whose thickness is an addition of the strip conductor 3 and the tapes 7 and 8. The moment the edge of the strip conductor 3 of the zonal material is folded, the tapes 7 and 8 are taped in succession to the process of the strip conductor 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to the winding of a molded transformer, and particularly to taping suitable for covering the end of a strip conductor.

[Background of the invention]

FIG. 3 shows a longitudinal cross-sectional view of a conventional molded winding.

The insulating layer 1 reinforced with glass Fajiff is, for example, a semi-cured prepreg made by impregnating a glass tape with epoxy resin and wound to a predetermined thickness. A coil is formed by winding a strip conductor 3 in the radial direction the required number of times.Insulating paper 5, 6 necessary to insulate the voltage induced between the turns of the conductor 3 is wound between the turns of the conductor 3. However, in order to avoid dielectric breakdown due to pinholes in the insulating paper, it is usually wound as a set of two sheets. Further, in order to prevent mutual bridging at both ends of the single conductor 3, the width of the insulating papers 5 and 6 is determined so as to extend several times beyond the width of the strip conductor 3. An insulating layer 2 similar to that on the inner side is formed on the outermost periphery after a predetermined number of turns. Next, both ends of this coil are filled with a semi-hardened putty hardenable resin 4.

By heating the whole in a drying oven, the resin is cured so as to adhere to the insulating layers 1, 2 and 5, 6.

In this way, a molded coil with excellent moisture resistance and dust resistance is manufactured. The structure shown in FIG. 3 has the following drawbacks. First, since the insulating paper 5° protrudes from the 6-strand conductor 3, it is extremely difficult to fill the gap between this protrusion and the end of the strip conductor 3 with putty-like thermosetting resin. In addition, if the putty-like resin is forcibly filled, there is a risk that cracks will occur at the ends of the insulating papers 5 and 6, and the insulating effect due to the long-awaited protrusion will be lost. Therefore,
In order to solve these problems, as shown in Fig. 4, a single-sided adhesive tape 7 made of insulating paper coated with an appropriate adhesive is continuously folded back and pasted so that the adhesive side is on the side of the strip conductor 3. By attaching the strip conductor 3, bridging between both ends of the strip conductor 3 can be prevented. Further, a sheet of insulating paper 6 having a width equal to the width of the strip conductor 3 is wound around the conductor 3 for insulating the parts other than both ends thereof. Note that an insulating paper 5 having a width narrower than 6 is wound around a portion other than both ends of the strip conductor 3 to which the adhesive tape is attached.

However, in order to attach the single-sided adhesive tape 7°8 to the end of the strip conductor 3, it is necessary to manually bend the adhesive tape 9.10 and advance it intermittently in the a1 and a2 directions, as shown in Figure 5. There is. In addition, since the length of adhesive tape that can be pasted is limited to the length that is torn off from the adhesive tape hoop, it is impossible to work continuously when pasting the ends of long strip conductors, and it is extremely difficult. It's inefficient.

An example of a method for manufacturing a molded winding wire in which the end of a strip conductor is coated with insulation is disclosed in Japanese Patent Application Laid-Open No. 54-23963, which describes a device for bending the end of an interlayer insulator. There is no detailed explanation.

[Purpose of the invention]

The purpose of the present invention is to provide a structure in which the end of one winding is filled with a thermosetting resin, and the width of the insulating paper and the width of the winding conductor are adjusted so that the protrusion of the insulating paper between turns does not interfere with resin filling. To provide a taping machine which folds back a single-sided adhesive tape on the end of a strip conductor and simultaneously attaches it continuously in accordance with the progress of one conductor in a molded winding wire having the same conductor.

[Summary of the invention]

The key points of the present invention are that the single-sided adhesive tape, which is supplied while being pressed vertically against the end face of the strip conductor, has a large entrance or side angle, a small exit angle, and the thickness of the strip conductor and the adhesive tape are By passing the tape through a mold with a groove that corresponds to the combined dimensions, the tape can be folded and continuously pasted without leaving any air bubbles or wrinkles due to tape twisting at the end of the strip conductor. There is a particular thing.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. In the work of taping adhesive tape to the end face of the strip conductor 3, the adhesive tape pulled out from the tape hoop 9, 1o, which is wrapped with adhesive tape on one side, is pressed against the end face of the strip conductor by rollers 11, 12. By being pressed against the conductor from the bl and b2 directions, the end face and the adhesive tape are brought into close contact with each other at this point, thereby preventing air bubbles and wrinkles from forming between the conductor and the tape. Subsequently, the adhesive tape 7 fed by the movement of the strip conductor 3 is molded into a mold 13.14 having a large angle at the entrance 14A and a smaller angle at the exit 14B than 14A, and a groove with a gap equal to the thickness of the conductor and the tape. The tape inserted by passing through the groove can be bent up and down as it passes through the groove and taped to the conductor ends.

Further, by pressing the strip conductor 3 in the di and d2 directions using the molds 13 and 14, generation of wrinkles due to air bubbles or twisting of the tape itself is prevented between the conductor end and the tape.

FIG. 2 is a detailed view of the adhesive tape being folded within the mold. The entrance side g surface of the mold 13 has a V-shaped groove with an angle θ larger than the adhesive tape width, and the exit side surface has a groove with a width equal to the combined thickness b of the conductor 3 and the adhesive tape 8. Taping is performed so that the end of the strip conductor is covered by the inclined portion connecting the two.

In the embodiment of the present invention, as the conductor 3 advances in the f direction, the end face is pressed by drawing the adhesive tape by the rollers 11 and 12, and the tape hoops 9 and 10 are cl and c2, respectively.
direction and the adhesive tape is automatically fed,
Continuous taping work is possible and is highly efficient.

〔Effect of the invention〕

It has the effect of reducing

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a taping machine according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of the process of bending and pasting the adhesive tape.
FIG. 3 is a vertical cross-sectional view of a conventional coil. FIG. 4 is a longitudinal sectional view of a new type of coil for carrying out the present invention, and FIG. 5 is a perspective view of conventional work in manufacturing the new type of coil. 3... Strip conductor, 7, 8... Single-sided adhesive insulating tape, 9
゜1o... Tape hoop, II, 12... Roller for end pressing, 13.14... V-groove mold.

Claims (1)

[Claims] 1. A roller that is equipped with a tape that has adhesive on one side and presses the tape against the longitudinal end face of the strip material from the side opposite to the adhesive face, and the tape that is pasted to the end face by this roller is By passing through a mold having a groove with a large outlet side angle, the tape is folded back at the end of the strip material at the same time as the strip material advances;
A taping machine that is characterized by continuous pasting.