JP2001202839A - Laminating and adhesion method for insulation plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an adhesion failure of laminated pressed boards and to increase strength on boundary of attached layers and an adhesive strength by the uniformity of adhesive, pressure and the increasing of application amount in attaching. SOLUTION: In this adhesion method for laminating insulation plates, at least one sheets 2 applied with adhesive are fitted between a plurality of press boards 1 used in a stationary induction electric equipment and then the press boards 1 are attached by pressing using a press jig 3. The press boards 1 are pressed and attached with each other in state that an elastic body 4 is interposed between the press boards 1 and the press jig 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an insulating component which is insulated from a stationary induction electric device, and more particularly to a method for laminating and bonding a press board which is an insulating plate.

[0002]

2. Description of the Related Art FIG.
This will be described with reference to (a) and (b). In a conventional press board laminating method, as shown in FIG. 5B, one or a plurality of adhesive sheets 2 having an adhesive adhered are sandwiched between a plurality of laminated press boards 1, and a required thickness is obtained. As shown in FIG. 5 (a), several sets of the stacked units were set between press jigs 3 and 3, and were laminated and bonded by heating and pressing.

[0003]

By the way, the strength of the laminated product of the press board 1 described above, especially when the adhesive sheet 2 is used as the adhesive as in the conventional method, Since there is a limit in the amount of adhesive applied per sheet, it largely depends on the variation of the thickness of the press board 1 and the uniformity of the adhesive pressure at the time of lamination.

On the other hand, since the material of the press board 1 is the same as that of paper, the thickness of the material varies widely and the peel strength of the press board surface is generally low. For this reason, there has been a problem that the laminated product of the press board 1 bonded by the conventional method causes a bonding failure or a layer crack near the bonding surface.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the conventional circumstances, and has been made to prevent a bonding failure of a laminated press board by uniformizing a bonding pressure at the time of bonding and increasing an amount of applied adhesive. An object of the present invention is to provide a method for increasing the strength near the layer boundary and for laminating and bonding an insulating plate having a high bonding strength.

[0006]

According to the first aspect of the present invention, at least one sheet having an adhesive applied thereto is sandwiched between a plurality of press boards used for a stationary induction device. In a method of laminating and bonding an insulating plate, which laminates the press board by pressurizing with a press jig, an elastic body is interposed between the press board and the press jig, and the press board is laminated. It is characterized by bonding.

[0007] In the first aspect of the present invention, the elastic body sandwiched between the press board and the press jig is pressed by inserting an elastic body between the press board and the press jig and applying pressure. By absorbing the variation in the thickness of the press board, the bonding pressure applied during bonding can be made uniform.

According to a second aspect of the present invention, in the method of laminating and bonding an insulating plate according to the first aspect, the elastic body is made of silicon rubber having high heat resistance.

According to the second aspect of the present invention, even when heating is performed at the time of laminating and bonding, the thickness variation of the press board can be reduced without deterioration of the silicon rubber sandwiched between the press jig and the press board. Absorption and uniformity of the bonding pressure at the time of bonding can be achieved.

According to the third aspect of the present invention, at least one sheet to which an adhesive is adhered is sandwiched between a plurality of press boards used for a stationary induction device, and the press boards are laminated by pressing with a press jig. In the method of laminating an insulating plate to be bonded, a slit is formed in a sheet to which the adhesive is applied, a plurality of sheets are sandwiched between the press boards and pressurized, and the press boards are laminated and bonded. I do.

According to the third aspect of the present invention, a slit is formed in the sheet to which the adhesive is adhered, and a plurality of the sheets are sandwiched between press boards and pressurized to adhere to each adhesive sheet. The amount of the adhesive contacting the press board can be increased by flowing the applied adhesive through the slit to the press board surface. As a result, the amount of the adhesive impregnating the press board increases, so that the strength near the adhesive layer of the press board increases, and the adhesive strength can be improved.

According to the fourth aspect of the present invention, at least one sheet to which an adhesive is adhered is sandwiched between a plurality of press boards used for a stationary induction device, and the press boards are laminated by pressing with a press jig. In the method of laminating an insulating plate to be bonded, an elastic body is inserted between the press board and the press jig, and a plurality of sheets on which a slit is formed and an adhesive is adhered are sandwiched between the press boards. It is characterized in that the press board is laminated and bonded by pressing.

[0013] In the invention according to the fourth aspect of the present invention, a slit is formed in the adhesive sheet, and a plurality of the sheets are sandwiched between press boards so as to be sandwiched.
Since the adhesive attached to each sheet flows into the press board surface through the slit, the amount of the adhesive in contact with the press board can be increased. As a result, the amount of the adhesive impregnating the press board increases, and the strength near the adhesive layer of the press board can be increased.

The elastic body interposed between the press board and the press jig absorbs the variation in the thickness of the press board and the variation in the thickness of the adhesive sheet. Uniformity can be achieved, adhesion failure can be prevented, and adhesion strength can be improved.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1A and 1B are a cross-sectional view and a perspective view, respectively, showing a state in which press boards are laminated in a first embodiment of the method of laminating and bonding insulating plates according to the present invention. The same parts as those in the conventional example are denoted by the same reference numerals and described. The same applies to the following embodiments.

As shown in FIG. 1B, one or a plurality of adhesive sheets 2 coated or impregnated with an adhesive are sandwiched between a plurality of laminated rectangular flat press boards 1. , Until the required thickness.

On the upper surface of the lower part of the pressing jig 3, an elastic body 4 such as a natural rubber or a synthetic rubber formed in a rectangular flat plate shape is formed.
Are stacked, and a plurality of sets of the above-described laminated press boards 1 are set on the upper surface of the elastic body 4. Further, an elastic body 4 is overlaid on the laminated press board 1, and the upper part of the press jig 3 is set on the upper surface of the elastic body 4, and FIG.
Pressure bonding is performed as shown in FIG.

Next, the operation of the present embodiment will be described.

When the press boards 1 having different thicknesses are laminated, the thickness of the press boards 1 in each set varies greatly, but between the press jig 3 and the press board 1. By interposing the elastic body 4, the variation in the thickness of the press boards 1 in each set is absorbed,
As a result, it is possible to equalize the bonding pressure applied to the laminated press boards 1.

FIGS. 2 (a) and 2 (b) are a sectional view and a perspective view showing a state of press board lamination in a second embodiment of the method for laminating and bonding insulating plates according to the present invention.

As shown in FIG. 2B, one or a plurality of adhesive sheets 2 coated or impregnated with an adhesive are sandwiched between the plurality of press boards 1 until the required thickness is reached. Laminate.

Then, a high-heat-resistant silicone rubber 5 formed in a rectangular plate shape is overlaid on the upper surface of the lower part of the press jig 3, and a plurality of sets of the above-described press boards 1 are set on the upper surface of the silicon rubber 5 I do. Further, a silicone rubber 5 is superimposed on the laminated press board 1,
The upper part of the press jig 3 is set on the upper surface of the silicone rubber 5 and is bonded by pressure as shown in FIG.

Next, the operation of the present embodiment will be described.

When the press boards 1 having different thicknesses are laminated, the thickness of the press boards 1 in each set varies greatly. The interposition of the silicon rubber 5 absorbs variations in the thickness of the press boards 1 of each set, and as a result, the bonding pressure is uniformly applied to the press boards 1 of each set.

The silicone rubber 5 has high heat resistance,
Even in the case of heat bonding, it is possible to absorb a variation in the thickness of the press boards 1 in each set without thermal deterioration, and to make the bonding pressure uniform. As a result, the bonding failure of the press board 1 can be prevented, and the bonding strength of the press board 1 can be improved.

The high heat-resistant silicone rubber 5 of this embodiment has a high-temperature operating temperature of 280 ° C., and it is desirable to use it.
Butadiene, isobutylene, chloroprene, butyl rubber, acrylonitrile and the like may be selectively used.

FIGS. 3A and 3B are a sectional view and a perspective view, respectively, showing a state in which press boards are laminated in a third embodiment of the method of laminating and bonding insulating plates according to the present invention.

As shown in FIG. 3 (b), a plurality of adhesive sheets 2 coated or impregnated with an adhesive are sandwiched between a plurality of press boards 1 and laminated until the required thickness is reached. The adhesive sheet 2 has a plurality of rectangular slits 2a formed at regular intervals in the longitudinal direction.

The press board 1 thus laminated
Is set on the upper surface of the lower part of the press jig 3 as shown in FIG. 3A, the upper part of the press jig 3 is set on the upper surface of the set press board 1, and pressure-bonded.

Next, the operation of the present embodiment will be described.

A slit 2a is formed in the adhesive sheet 2,
Further, the adhesive applied to each adhesive sheet 2 is slit 2
Since it flows into the surface of the press board 1 through a, the amount of the adhesive in contact with the press board 1 can be increased. As a result, the amount of the adhesive impregnated in the press board 1 increases, so that the strength near the adhesive layer of the press board 1 increases, and the adhesive strength can be improved.

FIGS. 4 (a) and 4 (b) are a sectional view and a perspective view, respectively, showing a state in which press boards are laminated in a fourth embodiment of the method for laminating and bonding insulating plates according to the present invention.

As shown in FIG. 4 (b), a plurality of adhesive sheets 2 having slits 2a are sandwiched between a plurality of press boards 1 and laminated until the required thickness is reached.
Then, the elastic body 4 is overlapped on the upper surface of the lower part of the press jig 3, and a plurality of sets of the laminated press boards 1 are set on the upper surface of the elastic body 4. Further, the elastic body 3 is superimposed on the laminated press board 1, the upper part of the press jig 3 is set on the upper surface of the elastic body 4, and pressure bonding is performed as shown in FIG.

Next, the operation of the present embodiment will be described.

A slit 2a is formed in the adhesive sheet 2,
Further, the adhesive applied to each adhesive sheet 2 is slit 2
Since it flows into the surface of the press board 1 through a, the amount of the adhesive in contact with the press board 1 can be increased. As a result, the amount of the adhesive impregnating the press board 1 increases, so that the strength near the adhesive layer of the press board 1 can be increased.

In addition, since both the press board 1 and the adhesive sheet 2 have thickness variations, when a plurality of adhesive sheets 2 are sandwiched and laminated on the press board 1, each set of laminated press Although the variation in the thickness of the board 1 is further increased, the variation in the thickness of the stacked press boards 1 of each set is reduced by the elastic body 4 interposed between the press jig 3 and the press board 1. As a result, the bonding pressure applied to each set of the laminated press boards 1 can be equalized. As described above, the bonding failure of the press board 1 can be prevented, and the bonding strength of the press board 1 can be increased.

[0038]

As described above, in the method for laminating and bonding insulating plates of the present invention, according to the first aspect of the present invention,
The elastic body inserted between the press board and the press jig absorbs the variation in the thickness of the press board,
Since the bonding pressure applied during bonding can be made uniform, it is possible to prevent poor bonding of the press board and increase the bonding strength.

According to the second aspect of the present invention, even when heating is performed at the time of laminating and bonding, the silicon rubber sandwiched between the press jig and the press board does not deteriorate and absorbs the variation in the thickness of the press board. In addition, since the bonding pressure at the time of bonding can be made uniform, it is possible to prevent poor bonding of the press board and increase the bonding strength.

According to the third aspect of the present invention, a slit is formed in the sheet on which the adhesive is adhered, and a plurality of the sheets are sandwiched between the press boards and pressed to thereby adhere to each adhesive sheet. As the adhesive flows into the press board surface through the slit, the amount of the adhesive in contact with the press board can be increased. As a result, the amount of the adhesive impregnating the press board increases, and the strength near the adhesive layer of the press board can be increased, so that the adhesive strength can be increased.

According to the fourth aspect of the present invention, a slit is formed in the adhesive sheet, and a plurality of the sheets are sandwiched between press boards so that the adhesive applied to each sheet passes through the slit. As a result, the amount of the adhesive in contact with the press board can be increased. As a result, the amount of the adhesive impregnating the press board increases, so that the strength near the adhesive layer of the press board can be increased. In addition, the elastic body interposed between the press board and the press jig absorbs the variation in the thickness of the press board and the variation in the thickness of the adhesive sheets stacked on each other, so that the bonding at the time of bonding is performed. Since the pressure can be made uniform, the bonding failure of the press board can be prevented, and the bonding strength can be increased.

[Brief description of the drawings]

FIGS. 1A and 1B are a cross-sectional view and a perspective view, respectively, showing a state in which press boards are laminated in a first embodiment of a method for laminating and bonding insulating plates according to the present invention.

FIGS. 2A and 2B are a cross-sectional view and a perspective view, respectively, showing a state in which press boards are laminated in a second embodiment of the method for laminating and bonding insulating plates according to the present invention.

FIGS. 3A and 3B are a cross-sectional view and a perspective view, respectively, showing a state in which press boards are laminated in a third embodiment of the method of laminating and bonding insulating plates according to the present invention.

FIGS. 4A and 4B are a cross-sectional view and a perspective view, respectively, showing a state in which press boards are laminated in a fourth embodiment of the method of laminating and bonding insulating plates according to the present invention.

FIGS. 5A and 5B are a cross-sectional view and a perspective view showing a state in which press boards are laminated in a conventional method for laminating and bonding insulating plates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press board 2 Adhesive sheet 2a Slit 3 Press jig 4 Elastic body 5 Silicon rubber

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F100 BA02 BA08 BA32 CB00 DG10A DG10B EJ202 EJ422 GB41 JK06 5G333 AA02 AB07 BA03 CB01 DA03 DA06 DC02 FB27

Claims (4)

[Claims] 1. An insulating plate for laminating and bonding the press boards by pressing at least one sheet with an adhesive between a plurality of press boards used for a stationary induction device and pressing the sheets with a press jig. In the bonding method,
A method for laminating and bonding insulating plates, wherein an elastic body is interposed between the press board and the press jig, pressure is applied, and the press boards are laminated and bonded. 2. The method according to claim 1, wherein said elastic body is made of silicon rubber having high heat resistance. 3. An insulating plate for laminating and bonding the press boards by sandwiching at least one sheet with an adhesive between a plurality of press boards used for a stationary induction device and pressing the sheets with a press jig. In the bonding method,
A method for laminating and bonding an insulating plate, comprising: forming a slit in a sheet to which the adhesive is adhered, sandwiching a plurality of the sheets between the press boards, and pressing and laminating the press boards. 4. Laminating an insulating plate for laminating and bonding said press boards by sandwiching at least one sheet with an adhesive between a plurality of press boards used for a stationary induction device and pressing with a press jig. In the bonding method,
An elastic body is interposed between the press board and the press jig, and a plurality of sheets formed with slits and adhered with an adhesive are sandwiched and pressed between the press boards, and the press boards are laminated and bonded. A method of laminating and bonding an insulating plate.