JPH1199520A - Heating device for laminate of rubber and metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a rapid and efficient heating process 15 forming a mold into such a structure that it can be split into plurality of divisions and making the divisions insulated electrically to each other. SOLUTION: A mold 1 is split into a mold body 25 an upper and a lower lid 3, 4. The mold body 2 is of such a shape that it follows the outer periphery of a laminate to be stored and its inner hollow part receives the laminate to be loaded internally and fetters the outer periphery or the laminate to be pressed from an upper and a lower side during the pressuring process. The upper and the lower lid 3, 4 block the opening end of the mold body 2 and are of such a shape that the lids 3, 4 are equal to the outer periphery of the mold body 2. In addition, the upper and the lower lid 3, 4 which come into contact with the mold body 2 which is formed of a conductive material, are formed of a non-conductive material so that the mold body 2 is electrically shut off from the upper and the lower lid 3, 4 respectively. Thus an eddy current to be generated in the mold body 2 is not conducted to the upper and the lower lid 3, 4 and the calorific value is suppressed and further, the part including the entire heating device other than the laminate is prevented from generating a heat to efficiently heat the laminate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus capable of efficiently heating and vulcanizing a laminate in which unvulcanized rubber and magnetic metal plates are alternately laminated.

[0002]

2. Description of the Related Art As a laminate of rubber and a metal plate, there is a laminate used for, for example, a seismic isolation device. This seismic isolation device is to be installed on the foundation of structures such as buildings, buildings, bridges, and machinery, and to reduce the response acceleration to the excitation force caused by an earthquake, etc., and to minimize damage due to the excitation force. belongs to.

[0003] A laminated body of rubber and a metal plate used in such a seismic isolation device is obtained by alternately stacking rubber and a steel plate (a typical example of a metal plate) and vulcanizing and bonding. In the case of a large seismic isolation device for a building, the design load is about 750 tons, and the diameter is about 1 meter.

[0004] Such a laminate of rubber and a metal plate is formed by first laminating unvulcanized rubber and a metal plate to form a laminate, and then constraining the outer periphery of the laminate with a mold to form a laminate. It is manufactured by heating to a predetermined vulcanization temperature while applying pressure from above and below.

Conventionally, as a heating method, a method of heating from the outside using a hot plate or the like is generally used. However, since the thermal conductivity of the unvulcanized rubber is poor, the laminate is heated from the outside. There was a problem that it took too much time to transfer heat to the inside. Particularly, in the case of a large seismic isolation device such as for a building, a long time of 10 to 20 hours is required in the vulcanization process, and the energy efficiency and productivity are extremely poor. Therefore, recently, a method of heating an unvulcanized rubber from the inside by heating the internal metal plate by electromagnetic induction heating and conducting heat from the heated metal plate has been studied (not disclosed).

[0006]

However, this heating by electromagnetic induction still generates heat not only in the laminate but also in a mold around the laminate, and there is room for improvement in order to improve energy efficiency. It is believed that there is.

[0007] For example, a mold for restraining a laminated body at the time of pressurization is formed of a non- or weak magnetic material so as not to hinder the magnetic flux introduced into the laminated body. A stainless steel plate such as SUS304 is preferred from the viewpoint of high strength and low cost. However, on the other hand, a stainless steel plate is a conductive material, and when placed under the influence of a magnetic field, an eddy current is generated in the body and heat is generated, as in the case of the metal plate forming the laminate. When the eddy current (induced current) I flows a long distance along the outer circumference of the cylindrical (mold body) and the disk-shaped (upper and lower lid) molds, there is a large resistance R corresponding to the outer circumference length. Heat is generated with a large power I ² × R. In some cases, the heat generated by such a mold is higher than that of the metal plate constituting the laminate, and the temperature difference between the outer peripheral portion and the inner deep portion of the laminate increases. There is a risk of dropping the result.

Further, when eddy current in the mold body or heat from the heated mold is conducted from the mold to each part of the heating device which comes into contact with the mold, the heat efficiency is reduced, so that not only the heating time required to reach a predetermined temperature is prolonged, but also Even in the cooling step, the entire apparatus must be cooled, which causes a problem that the production cycle is lengthened.

On the other hand, if an insulator or a heat insulating material is placed above and below the mold in order to avoid conduction of eddy current and heat to the heating device, there is a problem that the magnetic flux flowing into the laminate decreases. That is, since the upper and lower platens that sandwich the mold from the upper and lower directions are formed of a magnetic material, when the induction coil is energized with the upper and lower platens close to the induction coil, the magnetic flux flows from the upper and lower platens to the axis of the induction coil. When the upper and lower platens are moved away from the induction coil by heat insulating material, the magnetic flux from the induction coil escapes in the vertical direction with the upper and lower platens, and the magnetic flux flowing into the hollow portion of the induction coil becomes It will decrease.
Therefore, the eddy current generated in the metal plate forming the laminate placed in the hollow portion is reduced, and the heating cannot be performed well.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an apparatus capable of quickly and efficiently heating a laminate in which unvulcanized rubber and a magnetic metal plate are alternately laminated. It is intended for.

[0011]

According to a first aspect of the present invention, there is provided a mold for restraining all directions of a laminate in which unvulcanized rubber and a metal plate are alternately laminated. A heating device configured to perform electromagnetic induction heating in a state housed in the mold, wherein the mold has a structure that can be divided into a plurality, and the plurality of divided bodies are electrically connected to each other. It is characterized by being electrically insulated. The entire mold may be formed of a non-conductive material. Since the eddy current does not flow through a long path in the divided body, the eddy current generated in the mold is small, and the amount of generated heat is suppressed.

According to a second aspect of the present invention, in addition to the first aspect, an insulator is provided between the divided bodies constituting the mold. The insulator is a means for electrically insulating the divided bodies from each other. As the insulator, a resin such as polyimide or Teflon is preferable because it must withstand a high temperature of about 160 ° C. When the mold comprises a cylindrical mold body and upper and lower lids closing both ends thereof, an insulator is inserted between the mold body and the upper and lower lids.

According to a third aspect of the present invention, in addition to the first or second aspect, at least one of the divided bodies constituting the mold is formed of a non- or weakly conductive material, The divided bodies formed of a conductive material are arranged so as not to be in electrical contact with each other. When the mold comprises a cylindrical mold body and upper and lower lids closing both ends thereof, and when the mold body is formed of a conductive material, the upper and lower lids are formed of a non- or weakly conductive material. By doing so, it is possible to prevent the current generated in the mold body from being transmitted to the upper and lower lids, flowing over a long distance, and increasing the amount of heat generated. When the upper and lower lids are made of a conductive material, if the mold body is made of a non-conductive or weakly conductive material, similarly, the current generated in the upper and lower lids is conducted to the mold body to increase the heat generation. Can be prevented.

According to a fourth aspect of the present invention, in addition to the first, second, or third aspect of the present invention, of the divided bodies, a slit formed of a conductive material suppresses generation of an eddy current. Or it has a division part. By providing a slit or a dividing portion in a divided body formed of a conductive material, eddy current generated in the divided body can be reduced.

[0015] The invention according to claim 5 is the invention according to claims 1, 2,
In addition to the invention described in 3 or 4, in the mold set portion of the heating device, a portion where the conductive portion of the mold contacts is formed of a non-conductive material, a weak conductive material, or a heat insulating material, or An insulator or a heat insulating material is inserted into a portion where the conductive portion contacts. Even if the eddy current does not flow over a long distance in the mold body, when the eddy current is conducted to the heating device when set in the heating device, the eddy current eventually flows over a long distance, and the effect is diminished. Therefore, it is preferable that electrical disconnection is made between the mold and the heating device. Further, it is possible to prevent the heat of the heated mold from being conducted to the entire heating device. The mold set portion is, in many cases, an upper and lower platen provided with a pressurizing mechanism, but is not limited to this, and indicates a site where the mold contacts widely.

The invention according to claim 6 is the invention according to claims 1 to 5
In addition to the invention described in any one of the above, the mold comprises a mold body for restraining the outer periphery of the laminate, and upper and lower lids for restraining the lamination direction. The mold body may be further divided. The same applies to the upper and lower lids.

The invention according to claim 7 is the invention according to claims 1 to 6
In addition to the invention described in any one of the above, an induction coil is arranged on the outer periphery of the mold such that the axis of the coil and the center in the stacking direction of the stacked body coincide with each other. A magnetic flux guide plate having a width capable of covering the end face of the induction coil is disposed on the upper and lower sides to promote the flow of magnetic flux into the laminate housed in the mold. The magnetic flux guide plate is a magnetic material, and is placed above and below the upper and lower lids of the mold, that is, near the end face of the induction coil, and guides the magnetic flux from the induction coil from the inside of the magnetic flux guide plate to the laminate. By arranging this magnetic flux guide plate, a constant magnetic flux is always introduced into the laminated body without being influenced by other magnetic materials (part of the heating device, upper and lower platens, etc.). Note that an insulating material may be inserted between the magnetic flux guide plate and the upper and lower lids of the mold to prevent the eddy current from increasing between the two members as long as the effect is not reduced.

According to an eighth aspect of the present invention, in addition to the seventh aspect, the magnetic flux derivative has a slit or a dividing portion for suppressing generation of an eddy current. The slits or dividing portions are arranged so that the slits or dividing portions of the upper and lower lids coincide with each other. An eddy current generated between the upper and lower lids and the magnetic flux guide plate is suppressed to prevent an increase in heat generation.

According to a ninth aspect of the present invention, an induction coil is disposed on the outer periphery of a laminate in which rubber and metal plates are alternately laminated so that the axis of the coil coincides with the center of the laminate in the laminating direction. A heating device comprising: a magnetic flux guide plate having a width capable of covering the end surface of the induction coil in the vicinity of the end surface of the induction coil in the axial direction, and disposed in a hollow portion serving as the axis of the induction coil. Further, it is characterized in that it is configured to promote the flow of magnetic flux into the laminated body. The magnetic flux guide plate is a magnetic material. From the viewpoint that the magnetic field can be further strengthened, a ferromagnetic material is preferable. The magnetic flux guide plate is provided in the vicinity of the axial end face of the induction coil, and can guide the magnetic flux to the hollow portion that is the axis of the induction coil, and can strengthen the magnetic field in the hollow portion. Therefore, it is possible to efficiently heat the laminate disposed in the hollow portion. The magnetic flux guide plate may be a magnetic material (eg, SS material, SUS material, etc.). The size is comparable to the circumference of the induction coil, and the thickness is
2 mm or more. By providing such a magnetic flux guide plate, for example, in the case of a heating device having a pressurizing mechanism, the position of the upper and lower platens (magnetic bodies) on which the mold is set can be set freely. In other words, even if a heat insulator or insulator is provided between the upper and lower platens and the mold for heat insulation and insulation, and the upper and lower platens are kept away from the mold, the heat flows into the laminated body placed in the hollow part of the axis of the induction coil. It does not reduce the generated magnetic flux.

According to a tenth aspect of the present invention, in addition to the ninth aspect, the magnetic flux guide plate has a slit or a dividing portion for suppressing generation of an eddy current. Heat generation of the magnetic flux guide plate can be suppressed.

According to an eleventh aspect of the present invention, in addition to the first or second aspect, a heat insulating material or an insulating material is inserted between the magnetic flux guide plate and a mold set of a heating device. It is. Even if a heat insulating material or an insulating material is inserted between the heating device and the heating device, the magnetic flux is not reduced because the magnetic flux is guided from the magnetic flux guide plate to the laminate.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. First, based on FIGS. 1 to 9,
An embodiment example of a mold applied to the heating device of the present invention will be described.

In FIG. 1, the mold 1 is divided into a mold body 2 and upper and lower lids 3 and 4. The mold body 2 has a cylindrical shape, and a laminate is inserted into an inner hollow portion, and restrains the outer periphery of the laminate that is pressed from above and below (axial direction) when pressed. The mold body 2 can have a polygonal shape of three or more triangles, such as a quadrangular cylinder shape in addition to the cylindrical shape as shown in the illustrated example, but has a shape along the outer periphery of the stacked body to be stored. The upper and lower lids 3 and 4 cover the open ends of the mold body 2 and have the same size and shape as the outer periphery of the mold body 2. These divided bodies (the mold body 2 and the upper and lower lids 3 and 4) are electrically separated from each other.
That is, as shown in FIG. 1, the upper and lower lids 3 and 4 that are in contact with the mold body 2 made of a conductive material are formed of a non-conductive material. The eddy current generated in the body of the mold body 2 is not transmitted to the upper and lower lids 3 and 4, and the amount of generated heat is suppressed.

As shown in FIG. 2, the mold body 2 may be formed of a non-conductive material, and the upper and lower lids 3 and 4 may be formed of a conductive material.

Further, as shown in FIG. 3, insulators 5 and 6 may be provided between the mold body 2 and the upper and lower lids 3 and 4.

As shown in FIG. 4, when the mold body 2 is a conductor and the upper and lower lids 3, 4 are non-conductors, the eddy current generated in the body of the mold body 2 is large. In such a case, for example, when a current flows along the outer periphery of the cylindrical mold body 2 as shown by an arrow 7, a large eddy current can be cut by forming a slit 8 vertically, and heat generation can be suppressed.

Further, as shown in FIG.
Even if a slit 8 is formed in the mold body 2, the upper and lower lids 3,
In the case where 4 is a conductive material, insulators 5 and 6
5B, as shown in FIG. 5B, the current that has been cut off by the slit 8 does not pass through the upper and lower lids as indicated by the arrows, and the heat generated in the portions 9 and 10 is reduced. Can be prevented.

Also, as shown in FIG. 6, by providing slits 11 and 12 in the upper and lower lids 3 and 4,
It is possible to prevent a large eddy current as shown by the arrow 13 from being generated in the upper and lower lids 3 and 4, and to suppress heat generation.

Further, as shown in FIG. 7, even if a number of short slits 14 are provided in the upper and lower lids 3, 4, the same effect as that having one long slit 11, 12 can be obtained.

As shown in FIG. 8, when the mold body 2 and the upper and lower lids 3 and 4 are both formed of a conductive material, the insulator 5 and the upper and lower lids 3 and 4 are located between the mold body 2 and the upper and lower lids 3 and 4. 6 are provided, and slits 8, 11, 12 are provided in the mold body 2 and the upper and lower lids 3, 4, respectively.

In the illustrated example, three parts (the mold body 2
And upper and lower lids 3 and 4).
The present invention is not limited to this, and the eddy current can be further reduced by further dividing the eddy current. Further, an insulating material may be interposed between a slit or a dividing portion provided as an electrically dividing means provided in the conductive material.

Suitable materials for the conductive material include strength,
A stainless steel material such as SUS304 is cited for its low cost and good workability.
It is a non-magnetic material or a weak magnetic material, does not prevent the magnetic flux from flowing into the laminated body, and in that respect, it can be said to be a preferable material for forming a mold. In the present invention, even if such a conductive material is used, the eddy current can be reduced as much as possible, and the same effect as when a non-conductive material is used can be obtained.

As the non-conductive material, ceramics, thermosetting resins (eg, polyimide, epoxy, etc.) having good heat resistance and pressure resistance can be used. When a mold divided body is formed with a non-conductive material,
Since there is no need to provide a slit or a dividing portion as an electric dividing means, the formation is easy.

The insulating plates 5 and 6 are annular thin plates having the same outer and inner diameters of the mold body 2 and are preferably made of a resin such as polyimide or Teflon so as to withstand high temperatures.

The mold 50 shown in FIG. 9 is configured so that the height between the steps 52a and 52b of the mold body 52 can be changed according to the height of the laminate. The mold 50 includes a mold body 52, upper and lower lids 53 and 54.
In addition, an inner ring 51 and an additional lid 55 are provided.

In FIG. 9, the laminate 60 and the laminate 6
1 is a structure in which a metal plate 62 and a rubber 63 are laminated, and the outer periphery thereof is wrapped with an annular rubber 64 so that the metal plate 62 is completely embedded in the rubber. 60 is taller. In addition, connecting metal plates 65 and 66 are provided on the end face in the stacking direction of the stack. The connecting metal plates 65 and 66 are provided with screw holes and the like for attachment, and thus have a large diameter.

In FIG. 9A, the inner ring 5 is placed on the step 52a of the mold body in order to accommodate the tall laminate 60.
1 is put on. Before vulcanization, a space for pressurization is provided between the upper surface 51a of the inner ring 51 and the connecting metal plate 66, but after vulcanization, the upper surface 51a of the inner ring 51 is formed.
And the connecting metal plate 66 are in contact with each other. On the other hand, in FIG. 9B, the inner ring 51 is removed and the additional lid 55 is provided for the short-thick laminated body 61. When the upper and lower lids 53 and 54 are pressed by the pressing mechanism, the pressing force from the upper lid 53 reaches the stacked body 61 by the additional lid 55. Inner ring 5
The number of 1 and the additional lid 55 may be two or more.

In the present invention, as shown in FIG. 9, the present invention is also suitably used in a mold 50 having an inner ring 51 and an additional lid 55. That is, the inner ring 51 and the additional lid 5
5 is formed of a non-conductive material, an insulator is sandwiched between the inner ring 51 and the inner ring 51.
And eddy current generated in the additional lid 55 can be suppressed.

Further, it is preferable to provide an insulator between the upper and lower lids 3 and 4 and the heating device so that the eddy current generated in the mold body is not conducted to the heating device main body. For example, as shown in FIG. 10, an insulator 16 is inserted between the upper and lower lids 2 and the upper platen 14 of the heating device. The upper platen 14 is fixed to the frame via a support column 15, and the lower platen (not shown) is fixed to the frame via a pressure cylinder. Therefore, the mold set between the upper and lower platens (mold set part)
Pressurization is performed by driving the pressure cylinder. When an eddy current is generated in the mold body and is conducted from the upper and lower platens to the pressurizing device main body, the eddy current flows over a long distance and generates heat, thereby lowering thermal efficiency. Therefore, when the upper and lower lids 3 and 4 are formed of a conductive material, it is preferable to dispose the insulator 16. In addition, it is also preferable that the insulator functions as a heat insulating material because heat generated by the mold is transmitted to the heating device main body, and thermal efficiency is reduced even when the heating device is heated. Further, a part of the upper and lower platens may be formed of a non-conductive material.

On the other hand, as shown in FIG. 10, when an insulator or a heat insulating material is inserted between the upper and lower platens and the upper and lower lids 3 and 4, the upper and lower platens move away from the mold. This impairs the magnetic flux guiding function of the upper and lower platens. The upper and lower platens are magnetic materials and have a function of being provided near the end face of the induction coil and guiding the magnetic flux from the induction coil to a hollow portion that is the axis of the induction coil, but when the upper and lower platens move away, The magnetic flux from the induction coil is dispersed in the vertical direction and hardly enters the hollow portion. Therefore, as shown in FIGS. 11 to 15, it is preferable to provide a magnetic flux guide plate 36 to guide the magnetic flux to the hollow portion.

Next, a magnetic flux guide plate having such a function will be described with reference to FIGS. By providing the magnetic flux guide plate, it is possible to provide an insulator or a heat insulating material between the upper and lower platens and the magnetic flux guide plate without reducing the magnetic flux to the laminate, thereby preventing heat generation and heating of the entire heating device. Thus, the thermal efficiency can be improved.

Referring to FIG. 11, the vulcanizing apparatus 30 includes upper and lower platens 31 and 32 serving as a pressing surface of a pressing mechanism. A coil 35 is provided. Between the induction coil 35 and the upper platen 31, an insulator 36, a magnetic flux guide plate 37, and a heat insulator 38 are provided in this order from the induction coil 35 to the upper platen 31. Similarly, the insulator 36, the magnetic flux guide plate 37, and the heat insulator 38 are provided in this order from the induction coil 35 to the lower platen 32.

The magnetic flux guide plate 37 has a size substantially equal to the outer circumference of the induction coil 35, as shown in FIG.
It is placed so as to cover the vicinity of the end of the induction coil 35. The shape is not limited to the disk shape shown in FIG. 12 or FIG. 13, and also includes upper and lower platens 31, 32 as shown in FIG.
May be used. Further, like the above-mentioned upper and lower lids 3 and 4, it is preferable to have a structure for suppressing the generation of eddy current, and as shown in FIG. 13, a slit may be provided. Preferably, the length of the slit is as long as possible, as indicated by the dashed line. The magnetic flux guide plate 37 may be a magnetic material.

As shown in FIG. 11, it is preferable to insert an insulator 36 between the mold 34 and the magnetic flux guide plate 37 from the viewpoint of suppressing the eddy current. In some cases, it is preferable to place the upper and lower lids in contact with each other. In that case, as shown in FIG. 14, the slits or divisions of the magnetic flux guide plate 37 and the slits 11 of the upper and lower lids 3, 4
Preferably, 12 are placed so that they coincide.

The heat insulating material 38 is provided mainly so that heat generated when the magnetic flux guide plate 37 generates heat is not conducted to the entire heating device, but also has a function as an insulator.
That is, the upper and lower platens 31 of the pressure mechanism are generally SS
It is formed of a conductive material such as a material or stainless steel. Magnetic flux guide plate 3
When the eddy current generated in 7 is transmitted to the upper and lower platens 31, the amount of heat generated increases, resulting in energy loss. The heat insulating material can also prevent the energy loss. When there is a possibility that the magnetic flux leaks to the upper and lower platens 31 and the upper and lower platens may generate heat, the thickness of the heat insulating material may be increased to move the upper and lower platens away from each other, or the upper and lower platens may be formed of a non-conductive material. .

Next, the state change of the magnetic flux by the magnetic flux guide plate will be described with reference to FIG. 15 in comparison with the case where there is no magnetic flux guide plate.

In FIG. 15, reference numeral 41 denotes an upper cover, 42 denotes a heat insulating material, 43 denotes an upper platen, and 44 denotes an induction coil. In FIG. 15A, the magnetic flux guide plate 45 comprises the upper cover 41 and the upper platen 43. And is provided between them. (B) of FIG.
As shown in (2), when there is no magnetic flux guide plate 45 above and below the induction coil 44, the magnetic flux diverges into the space, and the magnetic flux flowing into the laminate 46 to be heated is reduced. Thus, as shown in FIG. 15A, when the magnetic flux guide plate 45 is provided, the magnetic flux from the induction coil 44 is guided to the magnetic flux guide plate 45, which is a magnetic material, and flows into the laminate 46.

[0048]

As described above, according to the first to sixth aspects of the present invention, the eddy current generated in the mold body can be suppressed, and the entire heating device other than the laminated body can be suppressed. Since it is possible to prevent the object from generating heat, it is possible to efficiently heat the object.

According to the seventh aspect of the present invention, since the magnetic flux guide plate for guiding the magnetic flux from the induction coil to the laminate is provided,
The magnetic flux flowing into the laminated body is not affected by the position of the magnetic material placed straight on the mold, such as the upper and lower platens, and a stable magnetic flux can be flowed into the laminated body. Therefore, by providing a heat insulating material or an insulator between the upper and lower platens and the mold, it is possible to prevent eddy currents generated in the mold and heat from the heated mold from being conducted to the upper and lower platens. Therefore, heating can be performed with higher thermal efficiency.

According to the eighth aspect of the present invention, even when the magnetic flux guide plate is placed directly on the upper and lower lids, the upper lid (or the upper lid) is formed by aligning the respective slits or dividing portions. The eddy current generated in the body of the lower lid and the magnetic flux guide plate can be suppressed.

According to the ninth to eleventh aspects of the present invention,
Similarly, in the heating without using the mold, the magnetic flux penetrating the laminate is strengthened by the magnetic flux guide plate, and the electromagnetic induction heating can be performed efficiently. When the magnetic flux guide plate is provided with a slit or a dividing portion, eddy current generated in the body of the magnetic flux guide plate can be suppressed. In the case where an insulating material or a heat insulating material is provided between the magnetic flux guide plate and the heating device, the device can be prevented from being heated.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of one embodiment of a mold used for a heating device of the present invention.

FIG. 2 is an explanatory view of another embodiment of a mold.

FIG. 3 is an explanatory view of still another embodiment of the mold.

FIG. 4 is an explanatory view of another embodiment of the mold.

FIG. 5 is an explanatory view of still another embodiment of the mold.

FIG. 6 is an explanatory view of another embodiment of the mold.

FIG. 7 is an explanatory view of still another embodiment of the mold.

FIG. 8 is an explanatory view of another embodiment of the mold.

FIG. 9 is an explanatory view of still another embodiment of the mold.

FIG. 10 is an explanatory view of one embodiment of the heating device of the present invention.

FIG. 11 is an explanatory sectional view of an embodiment of the heating device of the present invention.

FIG. 12 is a diagram illustrating an example of a magnetic flux guide plate.

FIG. 13 is an explanatory diagram of another example of the magnetic flux guide plate.

FIG. 14 is an exploded view of the heating device of FIG. 11;

FIG. 15 is a magnetic flux distribution diagram showing the effect of the magnetic flux guide plate.

[Explanation of symbols]

 1, 34, 50 Mold 2 52 Mold body 3, 41, 53 Upper lid 4, 54 Lower lid 5, 6 Insulator 8, 11, 12, 14 Slit 33, 46, 60, 61 Laminated body 62, 65, 66 Metal plate 63 Rubber 14, 31, 43 Upper platen 16 Insulator (heat insulator) 30 Heating device 32 Lower platen 34 Mold 35, 44 Induction coil 37, 45 Magnetic flux guide plate 38, 42 Heat insulator (insulator)

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ Identification symbol FI // B29K 21:00 105: 24 B29L 9:00 (72) Inventor Natsushiro Ureshino 2-3-1 Aramachi Niihama, Takasago-shi, Hyogo Prefecture No. Kobe Steel, Ltd.Takasago Works (72) Inventor Adult 2-3-1, Shinama, Araimachi, Takasago City, Hyogo Prefecture Inside Kobe Steel, Ltd.Takasago Works (72) Inventor Kazuhiko Sakiyama 2, Araimachi, Takasago, Hyogo Prefecture Kobe Steel, Ltd. Takasago Works, Kobe Steel Co., Ltd. (72) Inventor Hirohiko Fukumoto 1-5-5, Takatsukadai, Nishi-ku, Kobe, Hyogo Prefecture Kobe Steel, Ltd.Kobe Research Institute (72) Inventor Kiyotaka Inoue 172 Ikezawa-cho, Yamatokoriyama-shi, Nara Nita Corporation Inside the Nara Factory (72) Inventor Koichi Watanabe 172 Ikezawa-cho, Yamatokoriyama-shi, Nara Nita Corporation Hall

Claims (11)

[Claims] 1. A mold for restraining all directions of a laminate in which unvulcanized rubber and a metal plate are alternately laminated, and configured to perform electromagnetic induction heating in a state of being housed in the mold. A heating device, wherein the mold has a structure that can be divided into a plurality of parts, and the plurality of divided bodies are electrically insulated from each other. 2. The heating device according to claim 1, wherein an insulator is provided between the divided bodies constituting the mold. 3. At least one of the divided bodies constituting the mold is formed of a non- or weakly conductive material, and is arranged such that the divided bodies formed of the conductive material do not come into contact with each other. The heating device according to claim 1, wherein the heating device is provided. 4. The heating device according to claim 1, wherein, among the divided bodies, a divided body formed of a conductive material has a slit or a dividing portion for suppressing generation of eddy current. 5. In the mold set portion of the heating device, a portion where the conductive portion of the mold contacts is formed of a non-conductive material, a weak conductive material or a heat insulating material, or a conductive portion of the mold contacts the conductive portion of the heating device. 5. The heating device according to claim 1, wherein an insulator or a heat insulating material is inserted into the portion. 6. The heating device according to claim 1, wherein the mold comprises a mold body for restraining the outer periphery of the laminate and upper and lower lids for restraining the lamination direction. 7. An induction coil is provided on the outer periphery of the mold such that the axis of the coil coincides with the center of the stack in the stacking direction, and the induction coil is provided above and below the upper and lower lids of the mold. 7. A magnetic flux guide plate having a width capable of covering an end face of the mold is arranged to promote the flow of magnetic flux into the laminated body accommodated in the mold. Heating equipment. 8. The magnetic flux guide plate has a slit or a dividing portion for suppressing generation of an eddy current, and the slit or the dividing portion coincides with the slit or the dividing portion of the upper and lower lids of the mold. The heating device according to claim 7, wherein the heating device is arranged as follows. 9. A heating apparatus comprising: an induction coil disposed on an outer periphery of a laminated body in which rubber and metal plates are alternately laminated so that an axis of the coil and a center in a laminating direction of the laminated body coincide with each other. In the vicinity of the end face of the induction coil in the axial direction, a magnetic flux guide plate having a width capable of covering the end face of the induction coil is provided,
A heating device, characterized in that it is configured to promote the flow of magnetic flux into the laminated body disposed in a hollow portion that is the axis of the induction coil. 10. The heating device according to claim 9, wherein the magnetic flux guide plate has a slit or a dividing portion for suppressing generation of an eddy current. 11. The heating device according to claim 9, wherein a heat insulating material or an insulating material is inserted between the magnetic flux guide plate and a mold set portion of the heating device.