JP2020071919A - Induction heating laminating device and induction heating laminating method - Google Patents

Abstract

To provide an induction heating laminating device capable of solving the problems that reducing damages to a film due to the heat of the laminating device, an increase of the size of the device, and non-uniformity of temperature in the laminating area.SOLUTION: The induction heating laminating device is a device for joining a surface layer to a metal material via an intermediate layer by pressing a film having the surface layer and the intermediate layer against the surface of the metal material with a roller. The roller includes: a core part made of a material that is not induction-heated and a coating part made of a material that is not induction-heated covering the outer circumference of the core part. The core part includes an induction heating means for heating the surface of the metal material and a cooling means for cooling the roller therein.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an induction heating laminating apparatus and an induction heating laminating method for laminating a film layer on the surface of a metal material via an intermediate layer.

  In home appliances and the like that have a sheet metal press-molded product in their appearance, taking advantage of the original design property of the metal surface, for example, using a stainless hairline material with a hairline pattern on the surface of the metal material, differentiates the product design, Efforts to increase added value are becoming more active. On the other hand, efforts to further improve the design are required. As a method of improving the designability, in addition to the above-described method of processing the surface of the metal material, there is a method of attaching a decorative film, a method of giving unevenness to the film after attaching the film, and the like.

  As a method of bonding the film to the metal material, there is also a method of bonding via a sticky adhesive material, but reliability cannot be guaranteed for home appliances and in-vehicle products, so while applying heat. A general method is to use an adhesive material that can secure the adhesion strength by sticking.

  As a method for bonding while applying heat, a method using a heating roller is generally used, and various methods have been proposed in order to heat the roller more efficiently (see, for example, Patent Document 1).

  Patent Document 1 discloses a configuration using induction heating for heating a roller. FIG. 3 is a diagram showing an electrode production facility shown in Patent Document 1. As shown in FIG. 3, in the electrode production facility disclosed in Patent Document 1, the active material paste 105 is applied to the application surface 104a of the strip-shaped metal foil 104 that is a metal material to form a layer of the active material paste 105. The coating part 101 is formed. The production facility of Patent Document 1 is provided with a drying device 106 and a heating device 107 downstream thereof in order to dry the coating part 101 applied on the strip-shaped metal foil 104. The heating device 107 includes a drying roller 103 and an induction heating device 108. The drying roller 103 has a built-in induction heating coil 102 and is configured to self-heat by induction heating to dry the coating portion 101 on the strip-shaped metal foil 104.

JP, 2005-144055, A

  When a film or the like is attached to the surface of a metal material through an adhesive material while applying heat using a roller, the temperature of the surface of the metal material is the melting temperature of the adhesive material at the moment when the metal material receives pressure from the roller. Must have reached

  However, in the conventional bonding method, it is difficult to heat the surface temperature of the metal material to the melting temperature of the adhesive material by the method of heating the roller itself. Specifically, since the heat conductivity of the metal material is high and the heat of the surface of the heated metal material is instantly diffused inside the metal material, the adhesive surface of the metal material is heated to the melting temperature of the adhesive material. In order to do so, it was necessary to uniformly heat the entire metal material. For that purpose, it was necessary to increase the number of rollers or heat the rollers to a high temperature.

  However, the method of increasing the number of rollers has a problem that the device becomes huge. Further, in the method in which the roller is heated to a high temperature, there is a problem in that the film that is brought into contact with the film is damaged and the film is damaged by the roller heated to a high temperature.

  As a preheating method for heating the metal material to a predetermined temperature in advance before pressing the metal material with a roller, a heating furnace, induction heating, infrared heating, etc. can be considered, but each heating method requires a huge device. It has a problem of becoming. Further, these heating methods have a problem that it is difficult to uniformly heat the metal material.

In order to solve the above problems, an induction heating laminating apparatus according to one aspect of the present invention,
Induction heating in which a film, which is a thin film body formed of a plurality of layers having a surface layer and an intermediate layer, is pressed against the surface of a metal material with a roller to bond the surface layer to the metal material through the intermediate layer. A laminating device,
The roller is composed of a material that is not induction-heated, and includes a core portion that serves as a central portion, and a coating portion that covers the outer periphery of the core portion and that is made of a material that is not induction-heated.
Induction heating means for heating the surface of the metal material and cooling means for cooling the roller are built in the core portion.

The induction heating bonding method according to one aspect of the present invention is
A step of superposing the surface of the metal material and the surface of the film which is a thin film body, and a step of simultaneously applying pressure to the metal material and the film with a roller to perform induction heating
At the same time that the surface of the metal material is induction-heated at the maximum pressure position by the roller, the surface of the film that is not in contact with the metal material is cooled at the maximum pressure position by the roller, and the metal material and the film are separated. to paste together.

  According to the present invention, the surface of the metal material can be heated to a desired temperature only when the metal material receives pressure from the roller, and the surface temperature of the area of the metal material under pressure is substantially uniformly heated. In addition, since the metal material can be quickly cooled after being pressed by the roller, the cooling time for the metal material can be shortened, and the influence of heat on the film attached to the metal material can be greatly reduced. It can be reduced.

The side view which shows the induction heating bonding apparatus of Embodiment 1 which concerns on this invention. In the induction heating bonding apparatus of the first embodiment, a side sectional view showing an enlarged bonding moment. Diagram showing conventional electrode production equipment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same constituent elements may be given the same reference numeral, and redundant description may be omitted. To facilitate understanding, the drawings mainly show the respective constituent elements. Further, the thickness, length, etc. of each component shown in the drawings are different from the actual ones due to the convenience of drawing. It should be noted that the shape and the like of each component shown in the following embodiments are examples, and are not particularly limited, and various modifications can be made without substantially departing from the effects of the present invention.

  First, various aspects of the induction heating bonding apparatus and the induction heating bonding method of the present invention will be exemplified.

The induction heating laminating apparatus according to the first aspect of the present invention is
A film formed of a plurality of layers having a surface layer and an intermediate layer is pressed against a surface of a metal material with a roller to bond the surface layer to the metal material through the intermediate layer. There
The roller is composed of a material that is not induction-heated, and includes a core portion that serves as a central portion, and a coating portion that covers the outer periphery of the core portion and that is made of a material that is not induction-heated.
Induction heating means for heating the surface of the metal material and cooling means for cooling the roller are built in the core portion.

  The induction heating laminating apparatus of the first aspect configured as described above can heat the surface of the metal material to a desired temperature only when the metal material receives pressure from the roller, and the pressure applied to the metal material is reduced. It is possible to heat the surface temperature of the receiving region substantially uniformly. Further, after the pressure is applied by the roller, the metal material can be quickly cooled, so that the cooling time for the metal material can be shortened and the influence of heat on the film attached to the metal material can be reduced. Is possible.

In the induction heating laminating apparatus according to the second aspect of the present invention, in the first aspect, when the induction heating means presses the metal material with the roller, the surface of the metal material is Configured to heat to the melting temperature of the intermediate layer,
A maximum pressure position where the roller presses the film against the metal material may be configured to coincide with a maximum temperature position of the metal material.

An induction heating laminating apparatus according to a third aspect of the present invention is the induction heating laminating apparatus according to the first or second aspect, wherein the roller is in pressure contact with the film and the metal material by a pair of rollers.
When the surface of the metal material is heated by being sandwiched by the pair of rollers by the induction heating means incorporated in at least one roller, the distance between the metal material and the induction heating means is set to a predetermined distance. May be done.

  An induction heating laminating apparatus according to a fourth aspect of the present invention is the induction heating laminating apparatus according to any one of the first to third aspects, wherein the roller is cooled by the cooling means and the surface temperature of the roller is constant. May be configured to be retained at.

  An induction heating laminating apparatus according to a fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the temperature of the surface layer at the time of laminating is t1, and the temperature of the intermediate layer is If the temperature of the surface of the metal material is t2, the relationship of t1 <t2 <t3 may be satisfied.

  The induction heating bonding apparatus according to a sixth aspect of the present invention is the induction heating laminating apparatus according to any one of the first to fifth aspects, wherein heating is performed on the metal material at a position downstream of the maximum pressure position of the roller. The amount of heat may be reduced, and the heat of the heated surface may be diffused into the metal material to reduce the cooling time after bonding.

  In the induction heating laminating apparatus according to a seventh aspect of the present invention, in any one of the first to sixth aspects, the material of the core portion is resin and the material of the covering portion is rubber. It may be.

An induction heating laminating method according to an eighth aspect of the present invention is a step of laminating a surface of a metal material and a surface of a film, and pressurizing the metal material and the film with a roller at the same time as induction heating. Process,
At the same time that the surface of the metal material is induction-heated at the maximum pressure position by the roller, the surface of the film that is not in contact with the metal material is cooled at the maximum pressure position by the roller, and the metal material and the film are separated. Pasted together.

The induction heating laminating method of the ninth aspect according to the present invention is the method of the eighth aspect, wherein the film is formed of a plurality of layers having a surface layer and an intermediate layer, and the surface layer includes the intermediate layer. Is joined to the metal material,
The method may include the step of heating the surface of the metal material to the melting temperature of the intermediate layer when the metal material is pressed by the roller.

  An induction heating bonding method according to a tenth aspect of the present invention is the method according to the eighth or ninth aspect, wherein a maximum pressure position at which the roller presses the film against the metal material, and the metal material The highest temperature positions may match.

(Embodiment 1)
Hereinafter, Embodiment 1 of the induction heating bonding apparatus and the induction heating bonding method of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the induction heating bonding apparatus of the first embodiment.

  The induction heating laminating apparatus according to the first embodiment includes a pair of upper and lower rollers 3 (3a, 3b) which are a resin film 2 which is a thin film body (film) formed of a plurality of layers and which has a surface layer 2a and an intermediate layer 2b. It is a device that presses against the surface of the metal material 1. The intermediate layer 2b has an adhesive function of being melted by heat and joining the surface layer 2a and the surface of the metal material 1 to each other.

  Either one of the pair of rollers 3 (3a, 3b) or both rollers 3a, 3b are made of a material that is not induction-heated, and have a cylindrical core portion 6 serving as a central portion and at least the outer periphery of the core portion 6. And a covering portion 7 made of a material that is not induction-heated. In the core portion 6, an induction heating coil 4 which is an induction heating means and a cooling circuit 5 which is a cooling means are built in.

  In the first embodiment, the induction heating means (4) and the cooling means (5) are arranged only in the roller 3a on the upper side of the metal material 1. However, in the present invention, the induction heating means and the cooling are used. The circuit may be provided on both the upper and lower rollers 3a and 3b, or may be provided only on the lower roller 3b. In the configuration in which the lower roller 3b is provided with the induction heating means (4) and the cooling means (5), the core portion and the covering portion of the lower roller 3b are made of a material that is not induction-heated.

  In the first embodiment, an example in which resin is used as the material of the core portion 6 and rubber that is an elastic body is used as the material of the covering portion 7 will be described. However, the core portion 6 and the covering portion 7 are Any material may be used as long as it is not induction-heated, and other materials may be used according to each application.

  FIG. 2 is a side sectional view schematically showing the roller 3 (3a) of the induction heating bonding apparatus of the first embodiment in an enlarged manner at the bonding moment. FIG. 2 shows a state in which the covering portion 7 of the upper roller 3a presses the resin film 2 having the surface layer 2a and the intermediate layer 2b on the metal material 1 and is provided on the upper roller 3a. Induction heating is performed by the induction heating means (induction heating coil 4).

  As shown in FIG. 2, the induction heating coil 4, which is an induction heating unit provided on the upper roller 3a, is provided at the position of the rotation axis of the roller 3a, and is configured to generate a magnetic field from the rotation center region. .. The upper roller 3a is provided with an induction heating coil 4 which is an induction heating means and a cooling circuit 5 which is a cooling means. The cooling circuit 5 is arranged around the rotating shaft at substantially equal intervals. Has been done.

  The induction heating means in the first embodiment according to the present invention is the induction heating coil 4 provided on the roller 3a, and is composed of a copper pipe connected to the high frequency oscillator and the high frequency current transformer. In the first embodiment, an example in which the induction heating coil 4 is made of a copper pipe will be described, but the material of the induction heating coil in the present invention is not limited to copper. Further, although an example in which the pipe has a circular cross section will be described, the shape is not limited to the circular cross section, and may be, for example, a polygonal cross section.

  Further, in the first embodiment, it is desirable that the cooling circuits 5 arranged around the rotation axis of the roller 3a at substantially equal intervals be closer to the surface of the roller 3a as long as the strength of the roller 3a can be maintained. In the first embodiment, an example in which industrial water is used as the cooling medium flowing through the cooling circuit 5 will be described, but the cooling medium is not limited to water, and oil, air, or the like may be used. The surface temperature of the roller 3a by the cooling circuit 5 may be lower than the temperature at which the surface layer 2a and the intermediate layer 2b of the resin film 2 which is a thin film (film) suffers a problem.

  The induction heating device including the induction heating coil 4 is drive-controlled by a controller (not shown), and the surface of the metal material 1 pressed by the upper roller 3a is affected by the magnetic field lines of the induction heating coil 4. When receiving, eddy current is generated and heated. The region of the metal material 1 to be heated is a region near the induction heating coil 4 and is a region formed of a material to be induction-heated. In the configuration of the first embodiment, the surface position (maximum pressure position P) of the metal material 1 which is sandwiched by the upper and lower rollers 3 (3a, 3b) and receives the maximum pressure has the highest temperature due to dielectric heating ( (Highest temperature position). That is, the maximum pressure position P of the metal material 1 is a position on a line connecting the rotation centers O of the upper and lower rollers 3, and the maximum temperature position is the front surface of the metal material 1 and the back surface of the resin film 2 at the maximum pressure position P. Is the position to contact.

  On the surface of the metal material 1, since the metal material 1 flows linearly between the upper and lower rollers 3 on the upstream side and the downstream side of the maximum pressure position P, the influence of the magnetic field lines of the induction heating coil 4 is exerted. It becomes smaller than the maximum pressure position P. As a result, the maximum pressure position P due to the roller 3 coincides with the maximum temperature position due to induction heating. That is, on the surface of the metal material 1, the maximum pressure position P by the roller 3 becomes the shortest distance to the induction heating coil 4 and becomes the maximum temperature position.

  The maximum temperature of the surface (maximum pressure position P) of the metal material 1 at this time is set in the control unit so as to be equal to or higher than the temperature at which the intermediate layer 2b of the resin film 2 is melted. Further, on the surface of the metal material 1, the regions under pressure by the upper and lower rollers 3 are heated substantially uniformly.

  Further, on the surface of the metal material 1, the downstream region near the maximum pressure position P is somewhat induction-heated even after the maximum pressure position P, but the heat of the surface of the metal material 1 heated on the downstream side. Are diffused inside the metal material 1. Therefore, on the surface of the metal material 1, the surface temperature of the metal material 1 is maximized at the maximum pressure position P by the roller 3, and the heat generated by induction heating is diffused in the region downstream of the maximum pressure position P. Note that heat diffuses in the region upstream of the maximum pressure position P on the surface of the metal material 1, but as it approaches the maximum pressure position P, it is further induction-heated and the temperature rises.

  As described above, on the surface of the metal material 1, in the region downstream of the maximum pressure position P, the heat of induction heating diffuses into the metal material 1, so the metal material 1 and the resin film 2 are bonded together. The subsequent cooling time (cooling period) of the metal material 1 can be shortened.

  In general, induction heating, which can be heated in a non-contact manner, causes distortion due to temperature distribution when the object to be heated is a thin metal material. In the conventional laminating apparatus, the region to be induction-heated with respect to the metal material is displaced, the surface of the metal material is unevenly heated, the metal material is deformed, and the heating temperature is also uneven. .. However, according to the induction heating bonding apparatus and the induction heating bonding method of the first embodiment, the metal material 1 is heated while being pressed by the roller 3, and the metal material 1 and the induction heating means (4) are combined. Since it is configured to maintain a uniform distance, the unfavorable phenomenon that the metal material is deformed due to the uneven heating of the surface of the metal material and the heating temperature of the metal material is uneven, which has been a problem in the pasting device. This is a configuration that can reliably suppress. Therefore, the induction heating bonding apparatus and the induction heating bonding method according to the first embodiment are configured to uniformly heat the surface temperature of the metal material 1 at the maximum pressure position P and prevent the distortion of the resin film 2.

  In addition, although the metal material 1 linearly flows between the upper and lower rollers 3 in the configuration of the first embodiment, in the configuration in which the upper roller 3a is provided with the induction heating means (4), The metal material 1 may flow in a mountain shape so that the maximum pressure position P becomes an apex so that the metal material 1 becomes farther away from the upper roller 3a. By flowing the metal material 1 in a mountain shape with the maximum pressure position P as an apex in this manner, the metal material 1 is greatly affected by the magnetic flux from the induction heating means (4) in the region of the maximum pressure position P, and the maximum pressure position is increased. In the region other than P, the influence of the magnetic flux from the induction heating means (4) is extremely reduced, and the heating amount is reduced. Therefore, the cooling time (cooling period) of the metal material 1 after the metal material 1 and the resin film 2 are bonded together can be significantly shortened.

  Furthermore, the induction heating laminating apparatus according to the first embodiment has a structure in which the surface of the upper roller 3a is always cooled by the cooling means (5) built in the roller 3a. Therefore, in the induction heating bonding apparatus of the first embodiment, the heat of the induction heating means (4) itself built in the roller 3a is cooled by the cooling means (5), and the induction heating means (4) performs induction heating. The heat generated by the heat transfer from the surface of the metal material 1 to the roller 3a is cooled by the cooling means (5) so that the surface temperature of the roller 3a can be kept constant.

  In the induction heating bonding apparatus and the induction heating bonding method according to the first embodiment, at the maximum pressure position P on the surface of the metal material 1, the temperature of the surface layer 2a at the time of bonding is t1, and the temperature of the intermediate layer 2b is t2. When the temperature of the surface of the metal material 1 is t3, t1 <t2 <t3. That is, the temperature of the surface layer 2a at the time of bonding becomes the lowest, and the resin film 2 is cooled from the surface of the upper roller 3a.

As described above, by using the induction heating bonding apparatus according to the first embodiment, in the induction heating bonding method,
The metal material 1 and the resin material 2 are provided with a step of superimposing the surface of the metal material 1 and the surface of the resin film 2 and a step of pressurizing the metal material 1 and the resin film 2 with the roller 3 and at the same time performing induction heating. The film 2 is attached. In this bonding, the surface of the metal material 1 is induction-heated at the maximum pressure position P by the roller 3, and at the same time, the surface of the resin film 2 that is not in contact with the metal material 1 is cooled at the maximum pressure position P by the roller 3, The metal material 1 and the resin film 2 are bonded together.

  Further, in the induction heating bonding method of the first embodiment, the resin film 2 is formed of a plurality of layers having the surface layer 2a and the intermediate layer 2b, and the surface layer 2a is formed of the metal material 1 with the intermediate layer 2b interposed therebetween. And has a step of heating the surface of the metal material 1 to the melting temperature of the intermediate layer 2b when the metal material 1 is pressed by the roller 3.

  Furthermore, in the induction heating bonding method of the first embodiment, the maximum pressure position P where the resin film 2 is pressed against the metal material 1 by the roller 3 and the maximum temperature position of the metal material 1 coincide.

  As described above, in the induction heating bonding apparatus and the induction heating bonding method according to the first embodiment, the surface of the metal material 1 at the maximum pressure position P by the roller 3 is equal to or higher than the melting temperature of the intermediate layer 2b of the resin film 2. However, the surface layer 2a of the resin film 2 is cooled. For this reason, the surface layer 2a of the resin film 2 is significantly less affected by heat due to induction heating, so that the surface layer 2a does not shrink, etc., and highly reliable induction heating with no appearance defect or the like. A bonding apparatus and an induction heating bonding method are provided.

  In a conventional laminating apparatus that heats the film on a metal material by heating the roller itself, since the film and the roller are in contact with each other from the upstream side of the position where the roller and the metal material are in contact with each other, the heat of the film causes the film to move. There is a problem that damage will occur. In the induction heating laminating apparatus of the present invention, even at the position upstream of the maximum pressure position by the roller, the film is always cooled by the surface of the cooled roller, so that damage to the surface layer of the film by heat is prevented. It is prevented.

  INDUSTRIAL APPLICABILITY The induction heating bonding apparatus and the induction heating bonding method of the present invention can heat the surface of a metal material to a desired temperature only when the metal material is subjected to pressure by the roller, and the surface temperature of the metal material is substantially the same. It can be heated uniformly, and after pressing with a roller, the metal material can be cooled quickly, so the cooling time for the metal material can be shortened and the heat effect on the film attached to the metal material can be shortened. Can be prevented.

  Although the present invention has been described in the embodiments with a certain degree of detail, the disclosure content of the embodiments should be changed in the details of the configuration, and the substitution, combination, and order of elements in the embodiments may be changed. Changes may be made without departing from the scope and spirit of the claimed invention.

  INDUSTRIAL APPLICABILITY The induction heating laminating apparatus and the induction heating laminating method of the present invention can be generally used as an alternative method of an apparatus for laminating a film on a metal, and the laminated material thus laminated does not damage the film. Therefore, it can be applied to various appearance press-processed products, such as home appliances such as refrigerators, washing machines, and microwave ovens, vehicle-mounted interior parts, etc., which require designability.

1 Metal Material 2 Resin Film 2a Surface Layer 2b Intermediate Layer 3 Roller 4 Induction Heating Coil (Induction Heating Means)
5 Cooling circuit (cooling means)
6 Core 7 Cover

Claims (10)

A film formed of a plurality of layers having a surface layer and an intermediate layer is pressed against a surface of a metal material with a roller to bond the surface layer to the metal material through the intermediate layer. There
The roller is composed of a material that is not induction-heated, and includes a core portion that serves as a central portion, and a coating portion that covers the outer periphery of the core portion and that is made of a material that is not induction-heated.
An induction heating laminating apparatus in which an induction heating means for heating the surface of the metal material and a cooling means for cooling the roller are built in the core portion. The induction heating means is configured to heat the surface of the metal material to the melting temperature of the intermediate layer when the metal material is pressed by the roller,
The induction heating laminating apparatus according to claim 1, wherein a maximum pressure position where the film is pressed against the metal material by the roller coincides with a maximum temperature position of the metal material. The roller is configured to be in pressure contact with the film and the metal material sandwiched by a pair of rollers,
When the surface of the metal material is heated by being sandwiched by the pair of rollers by the induction heating means incorporated in at least one roller, the distance between the metal material and the induction heating means is set to a predetermined distance. The induction heating laminating apparatus according to claim 1 or 2, which has been applied.   The induction heating laminating apparatus according to claim 1, wherein the roller is cooled by the cooling unit so that the surface temperature of the roller is kept constant. When the temperature of the surface layer at the time of bonding is t1, the temperature of the intermediate layer is t2, and the temperature of the surface of the metal material is t3,
The induction heating bonding apparatus according to claim 4, which has a relationship of t1 <t2 <t3.   At the position downstream of the maximum pressure position by the roller, the heating amount for the metal material is configured to be reduced, and the heat of the heated surface is diffused inside the metal material, and the cooling time after the bonding is performed. The induction heating laminating apparatus according to claim 1, wherein the induction heating laminating apparatus is configured to shorten.   The induction heating laminating apparatus according to claim 1, wherein the material of the core portion is resin, and the material of the coating portion is rubber. A step of superimposing the surface of the metal material and the surface of the film, and a step of pressurizing the metal material and the film at the same time with a roller by induction heating,
At the same time that the surface of the metal material is induction-heated at the maximum pressure position by the roller, the surface of the film that is not in contact with the metal material is cooled at the maximum pressure position by the roller, and the metal material and the film are separated. Induction heating laminating method. The film is formed of a plurality of layers having a surface layer and an intermediate layer, the surface layer is bonded to the metal material through the intermediate layer,
The induction heating bonding method according to claim 8, further comprising a step of heating a surface of the metal material to a melting temperature of the intermediate layer when the metal material is pressed by the roller.   10. The induction heating bonding method according to claim 8, wherein the maximum pressure position where the film is pressed against the metal material by the roller and the maximum temperature position of the metal material are the same.

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