JPS61222212A - Manufacture of mold winding - Google Patents

Abstract

PURPOSE:To eliminate a mold for forming a winding and outer layer insulator, by winding and fixing a thin plate around the periphery of a winding drum, by forming in turn an inner insulating layer, conductor winding layer and outer insulating layer, by heating and hardening resin impregnated preliminarily in the inner and outer insulating layers, and by removing the winding drum and the thin plate. CONSTITUTION:Since the sleeve 12 of a winding drum is displaced relatively to the center axis 9 by rotating a handle 11, links 14, 15, 16 are displaced radially just as an umbrella is opened and closed. A thin plate 18 which is later removed is wound and fixed around the outer periphery of the winding drum pieces. A conductor wound layer 21a of conductor 21 and an outer insulating layer 22 are formed in turn through an inner insulating layer 19 and inter-layer insulating layers 20 on the bobbin which is constituted through the thin plate 18 by the winding drum 8, thus constituting a winding 17. Thereafter, resin which is preliminarily being impregnated in the inner and outer insulating layers 19, 22 is heated and hardened, and then the winding drum 8 and thin plate 18 are removed.

Description

[Detailed description of the invention] [Field of application of the invention] TECHNICAL FIELD The present invention relates to a method of manufacturing a mole winding.

[Background of the invention]

Conventionally, molded windings have a draft angle on the outer diameter as shown in Figs. Along with producing
Separate molds 3 and 4 with a fixed diameter are manufactured, and these are combined with home bases 1 and 2 and used as an integrated unit with sealing material 5°6. Note that in the figure, 7 is a shaft. This mold 3
, 4, but conventionally, each time a moorute winding is manufactured, nine home bases 1, 2 and a split mold 3 are formed corresponding to the inner diameter and length of the winding. , 4, etc., and the productivity is poor.

Regarding this, there is a method for manufacturing a molded winding wire that uses an outer layer insulator as a filler when resin is injected into the end of the winding, as described in Japanese Patent Publication No. 45-5848. To form the insulator, separate molds are required depending on the diameter and height of the molded winding, and no consideration has been given to the fact that the AT- for forming the outer layer insulator is also omitted. The present invention was conceived in view of the above points, and an object of the present invention is to provide a method for manufacturing a T-molded winding wire, which enables improvement in productivity.

[Summary of the invention]

That is, the present invention includes a plurality of rectangular winding drum pieces that are radially connected to a central axis via links, are movable in the radial direction, and have variable outer envelope diameters, and include: A thin plate whose surface is subjected to mold release treatment and is later removed is wound and fixed on the outer periphery of the winding drum piece, and an inner insulating layer,
A conductor winding layer and an outer insulating layer for winding a winding conductor via an interlayer insulating material are sequentially formed to form a winding wire, and then a resin pre-impregnated into the inner and outer insulating layers is heated and cured. , the winding drum and the thin plate after heating and curing? Therefore, on the outer part of the winding drum piece, there is a thin plate that is used to process the separation and to be removed later.
The coil is fixed, and the winding core is formed using the thin plate as the winding core, and an inner insulating layer, a conductor winding layer, and an outer insulating layer are sequentially formed on this to form a winding wire.Then, the inner and outer insulating layers are pre-impregnated. The resin is heated and cured, and after being heated and cured, the drum and thin plate are removed.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on the following embodiments shown in the drawings. An embodiment of the present invention is shown in FIGS. 1-6.

The winding drum 8 is provided on a central shaft 9 and has a nine threaded portion 10, a handle 11 that engages with this threaded portion 10 and rotates, and a handle 1.
A sleeve 12 slides along the central axis 9 by the rotational movement of the sleeve 1, one of which is pin-engaged with both ends of the sleeve 12,
The other side is engaged with the rectangular winding trunk piece 13, and the 7t link 14
．． It is composed of 15°, 16, etc. The winding drum pieces 13 are divided into an appropriate number in the circumferential direction according to the diameter range of the winding 17 to be manufactured and wound, and are arranged radially with respect to the central axis 9.

With this structure, by rotating the handle 11 with the nine-volume barrel 8, the sleeve 12 is displaced relative to the central axis 9, so the links 14, 15, and 16 are moved just like opening and closing an umbrella. This causes a radial displacement. This T-winding drum piece 13 is displaced in the radial direction as the handle 110 rotates, and the circumscribed circle of the winding drum piece 13 can be freely changed to an arbitrary diameter.

In this embodiment, the surface of the winding drum piece 13 is discretely treated, and a thin plate 18 which is to be removed later is wound and fixed. Winding conductor 21 via insulating layer 19 and interlayer insulator 20
The conductor winding layer 21a and the outer insulating layer 22 are formed on the bottom to form the winding 17t, and then the inner and outer insulating layers 19 and 22 are heated and cured with resin impregnated in advance. After that, the winding drum 8 and thin plate 18 are removed and replaced. By doing this, the winding 17 can be formed and molded on the winding drum 8 to make a molded winding, which makes it easy to manufacture the molded winding and improves productivity. A method for manufacturing a winding wire can be obtained.

In other words, since the winding and copper piece 13 are divided in the circumferential direction,
At the minimum diameter, the adjacent winding copper pieces 13 come into close contact to form a continuous circumferential surface, but as the diameter increases, the intervals between the winding cylinders 13 widen. Even if the prep V-gluing material is wound, the shape will not be polygonal, and a good insulation layer will not be formed due to sagging between the winding drum pieces 13. Therefore, in this embodiment, based on various trial results, a thin plate 18 having an appropriate rigidity, such as metal or tetrafluoroethylene resin of 1- or less, is wound and fixed so as to be circumscribed between the winding drum pieces 2. By doing so, on this winding drum 8, a winding core and mold casting core is formed. The outer peripheral surface of this thin plate 18 is subjected to a mold release treatment such as applying a mold release agent or winding a film.
A wire conductor 21 is wound thereon to form a predetermined conductor winding layer 21a via a suitable interlayer insulator 20, and an outer insulating layer 22t is formed thereon. The t-winding 17, which is constructed in close contact with the outer periphery of the thin plate 18, has an axial length of the interlayer insulator 20 that is somewhat longer than the axial length obtained by winding the winding conductor 21 a predetermined number of times in each layer. An end insulator 23 is placed between the interlayer insulator 20 and the winding conductor 21.
, 24 to prevent the creeping insulation strength between the layers from decreasing.

After forming the winding 17, the winding drum 8 is placed with the thin plate 18 interposed therebetween.
Both are heated to form the inner and outer insulating layers 19 and 22, and the prepreg material made of glass fibers is pre-impregnated with V-gin and made into a semi-hardened state.

By doing this, the inner and outer peripheries of the winding 17 are tied together. Finally, the diameter of the winding drum 8 is reduced and the winding drum S is removed, and the thin plate 1
Remove 8. Next, after filling the ends with putty Qv resin 25 and 26, apply end face forming plates 27 and 28, and tighten the tightening rod 2.
9. Tighten and heat at 30°C to harden the putty-like V-gin and mold the entire thing (secondary hardening).

In this case, if the winding 17 is small in size, good adhesion can be obtained without using the end face forming plates 27, 28.

In addition to heat curing as described above, molding can also be carried out in the following manner. After forming the winding 17, the inner and outer insulating layers 19 and 22 are heated and cured with V-gin, which has been impregnated in advance.
(next hardening).

Next, fill the end with putty-like V-gin 25.26, and winding 1.
The whole of 7 is heat cured (secondary cure). After this secondary curing, the winding drum 8 and the thin plate 18 are removed.

The above description is based on the case where prepreg materials are used for the inner and outer insulating layers 19 and 22, but it goes without saying that this can also be applied to cases where other ranges are implanted. In this case, the following procedure may be used. After forming the winding 1117, the winding drum 8 is removed. By reducing the diameter of the winding drum 8, the thin plate 1B can remain closely on the inner periphery of the winding 17 and be removed in the next state. After removing it, install temporary supports 31°32 into the thin plate 18, apply end forming plates 27.28t to both end faces of the winding 170, tighten with tightening rods 29°30, and inject V-gin. Then heat and harden.

In this way, according to this embodiment, by winding the thin plate 1B around the outer periphery of the winding drum 8 whose radius is variable, a molded winding wire having an arbitrary inner diameter can be manufactured, and the following effects can be achieved. can.

(1) There is no need to use Bunkinaya 3.4, which has specific dimensions, so the design is gold! ! Optimum dimensions can be selected without being limited to the dimensions of 3.4, and the design has a large degree of freedom and can easily accommodate any specifications.

(2) There is no need to design or manufacture the molds 3 and 4 at all.

(3) Assembly of molds 3 and 4 before winding work, combination with winding core, Jupiter 1-2 for combination, mold release work after curing, etc. are not required, and until winding work starts Setup time is halved.

(4) There is no need to store the molds 3, 4 or the winding core, or to perform anti-corrosion treatment, and the storage space and production preparation work such as repairing the molds 3, 4 in and out can be largely omitted.

(5) A thin thin plate 18 that wraps around the outer circumference of the winding drum 8 in a cylindrical shape
Even if it is disposable, its cost is extremely low and there is no need for storage.

(6) Since the end face forming plates 27 and 28 can be used in common by preparing plates in several stages depending on the diameter range of the winding 17, the rotation rate is extremely high. (7) If the thin plate 18 is not used, the winding drum 8 can naturally be used for purposes other than mold winding, so it is possible to improve the operating rate of production equipment, and it can be used for flexibility in the next process, including other models. ability can be maintained.

(8) Since the winding drum 8 itself has high rigidity, the FRP molded winding can provide a dense insulation layer necessary for the winding, and has excellent properties such as heat conduction and dielectric strength. ° ・If the rigidity of the thin plate 18 is too high, the wrap 3 after wrapping
3 (see FIG. 1) will repel, making it impossible to form a smooth cylindrical shape, and if it is too small, it will be unsuitable as a mold core. According to the inventor's trials, stainless steel plates with a thickness of I'm or less, tetrafluoroethylene molded plates, etc. are suitable, but it goes without saying that other materials can also be used.

〔Effect of the invention〕

As mentioned above, the present invention improves productivity,
It is possible to improve productivity and obtain a method for manufacturing nine-mold windings.

[Brief explanation of the drawing]

FIG. 1 is a front view of a winding drum showing a state in which a winding conductor is wound on the winding drum in an embodiment of the molded winding manufacturing method of the present invention;
FIG. 2 is a side view of the winding drum showing how the winding conductor is wound on the winding drum according to one embodiment, and FIG. FIG. 4 is a side view showing the structure of the winding drum used in the production; FIG. 4 is a longitudinal cross-sectional side view of the winding according to one embodiment; FIG. 5 is a close-up view of FIG. 4; and FIG. A vertical cross-sectional side view of the winding circumference showing the state during hardening,
Figure 7 is a front view of the winding core used in manufacturing the winding wire in the conventional molded winding manufacturing method, Figure 8 is the side view of Figure 7, and Figure 9 is the side view of Figure 7.
The figure is a perspective view of a wooden mold used for manufacturing a winding wire in a conventional molded winding manufacturing method. 8... Winding drum, 9... Center shaft, 13... Winding drum piece, 1
4゜15.16-...link, 17...winding, 18-
・Thin plate, 19--Inner insulating layer, 20--Interlayer insulator 1.21--Wound conductor, 21i11--Conductor winding layer, 22--Outer insulating layer, 23.24...・Edge insulation material, 25.26... putty-like material for dormitory 1 and dormitory 2
of

Claims (1)

[Scope of Claims] 1. A plurality of strip-shaped winding drum pieces that are radially connected to a central axis via links, are movable in the radial direction, and form a winding drum whose outer peripheral envelope diameter is variable. In this method, a thin plate whose surface is subjected to mold release treatment and which is to be removed later is wound and fixed on the outer periphery of the winding drum piece, and an inner layer of insulation is applied on the winding drum as a winding core through this thin plate. A conductor winding layer and an outer insulating layer are formed in order to form a conductor winding layer and an outer insulating layer for winding a wire conductor through an interlayer insulator, and then the resin pre-impregnated in the inner and outer insulating layers is heated. A method for manufacturing a molded winding, characterized in that the winding drum and the thin plate are removed after curing and heat curing. 2. The method of manufacturing a molded winding according to claim 1, wherein the thin plate is a stainless steel plate having a thickness of 1 mm or less. 3. The method of manufacturing a molded winding according to claim 1, wherein the thin plate is made of a polymeric insulating material such as tetrafluoroethylene film.