WO2011114484A1 - 樹脂フィルムの被覆方法及び被覆装置 - Google Patents
樹脂フィルムの被覆方法及び被覆装置 Download PDFInfo
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- WO2011114484A1 WO2011114484A1 PCT/JP2010/054655 JP2010054655W WO2011114484A1 WO 2011114484 A1 WO2011114484 A1 WO 2011114484A1 JP 2010054655 W JP2010054655 W JP 2010054655W WO 2011114484 A1 WO2011114484 A1 WO 2011114484A1
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- WIPO (PCT)
- Prior art keywords
- resin film
- core material
- coated
- chamber
- ridge line
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
- B29C51/06—Combined thermoforming and prestretching, e.g. biaxial stretching using pressure difference for prestretching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/16—Lining or labelling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/007—Using fluid under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1028—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith
Definitions
- the present invention relates to a method and apparatus for coating a resin film on the surface of a core material, and in particular, a resin that can suitably coat a resin film on a core material on which a convex portion is formed on the surface of the core material.
- the present invention relates to a film coating method and apparatus.
- a coating method for covering (overlaying) a resin film as a skin material on the surface of the core material has been proposed.
- a core material is disposed in an internal space formed by a pair of chambers, a resin film coated on the core material is softened by heating, and the resin film softened by pressurizing the inside of the chamber is used as the core material. It is pressed and covered.
- the following coating method has been proposed (for example, see Patent Document 2).
- the core material is disposed in the lower chamber of the pair of chambers (upper chamber and lower chamber), and the resin film is disposed between the upper chamber and the lower chamber.
- the resin film is softened by heating uniformly, the lower chamber is set to a pressure higher than that of the upper chamber, and the resin film is expanded to the upper chamber side.
- the core material is raised toward the swelled resin film, and the lower chamber is decompressed to cover the resin film on the upper surface and side surfaces of the core material.
- the following coating method has been proposed (for example, see Patent Document 3). According to this method, the resin film softened by heating is made to follow the surface shape of the recess by vacuuming, and the resin film is coated on the recess surface of the core material.
- the core material has a simple flat plate shape.
- the core material is simple. This assumes a rectangular parallelepiped shape.
- the resin film stretches due to insufficient pressure ( The resin film cannot be adhered to the core material. Therefore, in order to make the resin film follow the surface-shaped core material, it is preferable to apply a large pressure in the chamber, but at this time, the resin film may be torn.
- the resin film portion covered with the recess is vacuumed after the resin film contacts and is fixed (restrained) to the opening periphery of the recess during coating. Extend (extend) by pulling. For this reason, a large tensile strain acts on this portion, and the resin film may be torn.
- the present invention has been made in view of the above circumstances, and the object of the present invention is to remove the resin film from the surface without tearing the resin film even if the surface of the core material is uneven. Furthermore, it is providing the coating method and coating apparatus of the resin film which can be coat
- the inventors have conducted intensive studies, and as a result, by adopting the following methods (1) and (2) before coating, the surface of the core material can be suitably coated. I got new knowledge.
- a resin film portion having a small extension is heated to a higher temperature than a resin film portion having a large extension (elongation) in the resin film.
- the resin film portion having a large stretch has an allowance (strength) for stretching at the time of coating. This is a new finding that the surface of the core material can be coated without the tensile strain acting.
- a resin film coating method includes a core material arranged in an internal space formed by a pair of chambers, and a resin film on the surface of the core material.
- the resin film is coated with a resin film, wherein a convex portion is formed on the surface of the core material as the core material, and the convex portion includes at least two inclined surfaces having different inclination angles, and the two inclined surfaces.
- the inclination angle is small from the ridge line.
- the step of heating the resin film so that the second resin film portion to be coated on the inclined surface side is at a high temperature, and the pressure in the one chamber is relatively higher than the pressure in the other chamber.
- the step of extending the resin film so that the resin film swells to the other chamber side by increasing the height, and the convex portion of the core material by moving the core material toward the extended resin film The step of bringing at least the ridge line into contact with the resin film, and making the pressure in the one chamber relatively lower than the pressure in the other chamber, thereby making the resin film the surface of the core material And a step of covering the surface of the core material with the resin film so as to follow the shape.
- the second resin film portion covered from the ridge line to the inclined surface side having the small inclination angle is covered from the ridge line to the inclined surface side having the large inclination angle. It heats to high temperature compared with the 1st resin film part made. Thereby, this 2nd resin film is made easier to extend (extend) than a 1st resin film part.
- the second resin film portion is heated to a higher temperature than the first resin film portion. Extend more greatly. Therefore, in this case, the thickness of the second resin film portion is thinner than the thickness of the first resin film portion.
- the “resin film” referred to in the present invention is a concept including not only a film-like resin but also a sheet-like resin. Further, “stretching (stretching) of the resin film” means extending so that the thickness of the resin film is reduced.
- the convex part of the core material to be covered has two different inclined surfaces, such as an undercut shape or a shape having a side surface extending in a direction perpendicular to the plane part of the core material,
- the shape of the convex part is not particularly limited.
- the inclined surface with the large inclination angle is arranged on the inside, and the inclined surface with the small inclination angle is arranged on the outside.
- the step of preparing the core material having the concave portion formed on the surface of the core material by forming the convex portion on the outer peripheral portion of the surface of the core material, and covering the inner side of the ridge line in the step of heating the resin film The resin film is heated so that the resin film portion (the second resin film portion) coated on the outer side of the ridge line becomes higher than the resin film portion (the first resin film portion) to be applied. More preferably.
- the resin film comes into contact with at least the ridge line of the convex portion of the core material, and the resin film is restrained by this portion.
- the film part (first resin film part) covered on the inner side of the ridge line has a margin for extension, so that the resin film can be easily extended to the concave part on the inner side of the ridge line. Can do.
- the resin film can be coated on the surface of the core material without causing excessive tensile strain to act on the resin film.
- the heating temperature of the resin film is not particularly limited as long as a difference can be provided in the degree of extension of the resin film, but the step of heating the resin film
- the extension of the second resin film portion can be further increased, and the first resin film portion can have a larger allowance for extension.
- the step of heating the resin film and the step of extending the resin film may be sequentially performed.
- the step of heating the resin film and the resin More preferably, the step of stretching the film is performed simultaneously. By performing these steps simultaneously, a series of coating times can be further shortened.
- the air between the core material and the resin film can be suitably degassed by depressurizing one chamber in which the core material is disposed.
- a coating apparatus for suitably performing the coating method has a surface on which a convex portion is formed, and the convex portion has at least two inclined surfaces having different inclination angles and a ridge formed by the two inclined surfaces. And a pair of chambers in which an inner space for arranging the core material is formed, and the core material is placed in one of the pair of chambers.
- the other And the second heating unit generates heat at a temperature higher than that of the first heating unit, and the pressure in the one chamber and the pressure in the other chamber are relatively
- a pressure adjusting unit that adjusts the pressure in the pair of chambers and a mounting table moving unit that moves the mounting table to the other chamber side so as to generate a differential pressure.
- the second heating unit since the second heating unit generates heat at a higher temperature than the first heating unit, compared to the first resin film portion coated on the inclined surface side having the large inclination angle from the ridge line. And the 2nd resin film part coat
- the pressure adjustment part makes the pressure in the one chamber relatively higher than the pressure in the other chamber, so that the second resin film portion is compared with the first resin film portion. Can be extended.
- the ridgeline can be brought into contact with the resin film by the mounting table moving unit. After that, the pressure adjustment unit causes the pressure in the one chamber to be relatively lower than the pressure in the other chamber, thereby extending the first resin film portion having a margin for extension.
- a resin film can be coated on the surface of the core material.
- the convex portion is arranged on the core such that the inclined surface with the large inclination angle is arranged on the inner side and the inclined surface with the small inclination angle is arranged on the outer side.
- the resin film part (the first resin film part) to be coated is heated so that the second heating part is coated on the outside of the ridge line (the second resin). More preferably, the film portion is arranged to be heated.
- the resin film portion (second resin film portion) coated outside the ridge line is compared with the resin film portion (first resin film portion) coated inside the ridge line.
- the second resin film part can be extended by the pressure adjusting part.
- the resin film can be coated on the surface of the core material without applying excessive tensile strain to the resin film.
- the typical sectional view for explaining the process of arranging a core material and a resin film among the covering methods of the resin film concerning a first embodiment of the present invention The typical perspective view for demonstrating the arrangement
- the typical sectional view for explaining the process of making a core material contact the resin film among the covering methods of the resin film concerning a first embodiment of the present invention.
- covering a resin film on the core material surface among the coating methods of the resin film which concerns on 1st embodiment of this invention Typical sectional drawing for demonstrating the process of arrange
- Typical sectional drawing for demonstrating the process which makes a core material contact a resin film among the coating methods of the resin film which concerns on 2nd embodiment of this invention Typical sectional drawing for demonstrating the process of coat
- FIG. 1 is typical sectional drawing for demonstrating the process of arrange
- a coating device for coating is also included.
- FIG. 2 is a schematic perspective view for explaining the arrangement of the heating part, the resin film, and the core material in the step of heating the resin film in the resin film coating method according to the first embodiment of the present invention. It is.
- FIG. 3 is typical sectional drawing for demonstrating the process of extending a resin film among the coating methods of the resin film which concerns on 1st embodiment of this invention.
- the coating apparatus 1A includes a pair of chambers 2 including an upper chamber 2a (the other chamber) and a lower chamber (one chamber) 2b.
- An upper chamber moving device 3a for moving the upper chamber 2a in the vertical direction is connected to the upper chamber 2a.
- the core material 20 is disposed inside the pair of chambers 2. A sealed internal space is formed.
- the lower chamber 2b is fixed, and a mounting table 5A on which the core material 20 is mounted is disposed.
- the mounting surface of the mounting table 5A has a surface shape that matches the shape of the core material 20 so that the core material 20 can be stably mounted.
- the mounting table 5A is connected to a mounting table moving device (mounting table moving unit) 3b for moving the mounting table 5A up and down in the chamber 2 in the vertical direction.
- the coating apparatus 1 ⁇ / b> A further includes a film setting unit 4 for setting the resin film 10 and a heating unit 8 for heating the resin film 10.
- the film setting unit 4 is configured to set the resin film 10 between the upper chamber 2a and the lower chamber 2b at a position facing the mounting table 5A (position covering the opening of the lower chamber 2b). Thereby, as shown in FIG. 3, the resin film 10 can partition the internal space in the chamber 2.
- the core material 20 covered with the resin film 10 is made of metal, and a convex portion 20A is formed on the surface of the core material.
- the convex portion 20 ⁇ / b> A has at least two inclined surfaces 22 and 23 having different inclination angles, and has a ridge line 21 formed by the two inclined surfaces 22 and 23. Furthermore, at least one of the two inclined surfaces 22 and 23 has a larger inclination angle than the other inclined surface 22.
- This inclination angle is an angle formed by a flat surface (a surface substantially parallel to the front surface (back surface) of the resin film) other than the convex portion 20A of the core member 20 and the inclined surface. Therefore, the inclined surface 23 with a large inclination angle is steeper than the inclined surface 22 with a small inclination angle.
- such a core material 20 is coated with the resin film 10, and the apparatus configuration of the heating unit 8 is greatly different from the conventional one. That is, the resin film 10 part (first resin film part) 10A covered on the inclined surface 23 side with a large inclination angle across the ridge line 21 and the resin film covered on the inclined surface 22 side with a small inclination angle It is comprised so that a heating temperature with 10 parts (2nd resin film part) 10B may have a difference.
- the heating unit 8 is disposed in the upper chamber 2a and includes a first heating unit 8A and a second heating unit 8B.
- the second heating unit 8B is configured to generate heat at a higher temperature than the first heating unit 8A.
- the first heating unit 8 ⁇ / b> A heats the portion (first resin film portion) 10 ⁇ / b> A of the resin film 10 that is coated on the inclined surface 23 side having a large inclination angle from the ridge line 21. Is arranged.
- the 2nd heating part 8B is arrange
- the heating unit 8 can heat the second resin film portion 10B to a higher temperature than the first resin film portion 10A.
- the resin film 10 is extended (expanded)
- the resin film 10 approaches the heating unit 8, and thus the above-described heating state of the resin film 10 may change.
- it is desired to secure the softened state of the resin film more stably as shown in FIG.
- the heating unit 8 is The heat generation amount (heating temperature) of the first heating part 8A and the second heating part 8B so that the resin film part 10B is heated to a higher temperature than the first resin film part 10A. Is preferred. In this case, as described later, the resin film 10 may be heated and stretched simultaneously.
- the heating unit 8 is not particularly limited as long as the resin film 10 can be heated.
- the heating wire of the second heating unit is energized.
- the current to be generated is configured to be larger than that of the first heating unit.
- the upper chamber moving device 3a and the mounting table moving device 3b can include a mechanism composed of a cylinder and biston, a mechanism for converting a rotational motion into a linear motion, and the like.
- the upper chamber 2a and the mounting table 5A are moved up and down.
- the mechanism is not particularly limited as long as it can be moved in the direction.
- the coating apparatus 1A includes a pressure device 6 that can pressurize the chamber to atmospheric pressure or higher and a vacuum device 7 that can set the chamber to a negative pressure lower than atmospheric pressure. These communicate with the upper and lower chambers 2a and 2b via the three-way valves 9a and 9b.
- the devices 6 and 7 are provided with accumulator tanks 6a and 7a for supplying pressure stably.
- the compressed air device 6 has a compressor 6b connected to a tank 6a, and the vacuum device 7 has a vacuum pump 7c connected to the tank 7b.
- these devices 6, 7, 9a, 9b correspond to the pressure adjusting section referred to in the present invention, but are not limited to this device configuration.
- (1) Pressure in the upper chamber 2a The pressure in the lower chamber 2b and (2) the pressure in the upper chamber 2a is relatively lower than the pressure in the lower chamber 2b. If possible, it may be composed of only the pneumatic device 6 or only the vacuum device 7.
- FIG. 4 is typical sectional drawing for demonstrating the process of making a core material contact a resin film among the coating methods of the resin film which concerns on 1st embodiment of this invention.
- FIG. 5 is typical sectional drawing for demonstrating the process of coat
- the core material 20 described above is prepared, and the core material 20 is placed on the mounting table 5A in the lower chamber 2b of the pair of chambers 2, as shown in FIG.
- the resin film 10 is disposed at a position facing the core material surface so as to partition the internal space between the upper chamber 2a and the lower chamber 2b using the film setting portion 4A.
- the adhesive agent is apply
- the upper chamber moving device 3a is moved, and the upper chamber 2a is moved toward the lower chamber 2b (see FIG. 3).
- the upper and lower chambers 2a and 2b independent closed spaces are formed as the internal spaces by the resin film 10, respectively.
- the three-way valves 9a and 9b are closed so that the pressure in the chamber 2 does not change.
- the resin film 10 is heated using the heating unit 8 arranged in the upper chamber 2a.
- a resin film portion (first resin film portion) 10 ⁇ / b> A to be coated on the inclined surface 23 side having a large inclination angle from the ridge line 21 is heated by the first heating unit 8 ⁇ / b> A.
- the portion of the resin film (second resin film portion) 10B covered from the ridge line 21 to the inclined surface 22 side having a small inclination angle is heated by the second heating unit 8B.
- the second heating unit 8B has a higher heat generation temperature (a larger amount of heat generation).
- the 2nd resin film part 10B is heated by high temperature compared with 10A of 1st resin film parts.
- the three-way valves 9a and 9b are operated to supply the compressed air from the compressed air device 6 into the lower chamber 2b.
- the pressure in the lower chamber 2b becomes relatively higher than the pressure in the upper chamber 2a.
- the resin film 10 can be extended (stretched) so as to swell toward the upper chamber.
- the second resin film portion 10B is heated to a higher temperature than the first resin film portion 10A, the second resin film portion 10B is compared with the first resin film portion 10A. Thus, it will extend greatly (see the solid arrow in FIG. 3). That is, the thickness of the first resin film portion 10A is relatively thicker than that of the second resin film portion 10B. As a result, the first resin film portion 10A is subjected to a subsequent coating step. In (see FIG. 5), there is a margin for extension.
- the second resin film portion 10B is heated to a temperature equal to or higher than the softening point temperature and the first resin film portion 10A is heated to a temperature lower than the softening point temperature, the second resin film portion 10B is more preferably used. Can be extended greatly.
- the process of heating the resin film 10 and the process of extending the heated resin film so as to swell toward the upper chamber 2a were performed separately.
- the second resin film portion 10B is heated to a relatively high temperature in the expanded state, that is, in the expanded state, the second resin film portion 10B is the first resin film portion 10A.
- these two steps may be performed at the same time as long as they extend relatively as compared with the above.
- the mounting table 5A is raised using the mounting table moving device 3b. Thereby, the core material 20 moves toward the swelled resin film 10. Then, at least the ridge line 21 of the convex portion 20 ⁇ / b> A of the core material 20 is brought into contact with the back surface of the resin film 10. As a result, the resin film 10 is restrained by the ridge line 21. Thus, the extension of the first resin film portion 10A and the extension of the second resin film portion 10B are less likely to affect each other across the ridge line 21. In addition, in this embodiment, since the adhesive agent is apply
- the swelled resin film 10 is deformed, and coated and adhered to the surface of the core material 20. Specifically, as shown in FIG. 5, the resin film 10 is made to follow the surface shape of the core member 20 by making the pressure in the lower chamber 2b relatively lower than the pressure in the upper chamber 2a. Then, the resin film 10 is coated on the surface of the core material.
- the three-way valves 9a and 9b are operated to supply the pressurized air of the pressurized air device 6 to the upper chamber 2a so that the pressure is higher than the atmospheric pressure (see solid line arrows in FIG. 5).
- the vacuum device 7 is operated to suck the air in the lower chamber 2, and the lower chamber 2b is brought into a depressurized state whose pressure is lower than the atmospheric pressure (see the broken line arrow in FIG. 5). Thereby, air becomes difficult to enter between the core material 20 and the resin film 10.
- the method is not limited to this, and only the upper chamber 2a may be pressurized, and only the lower chamber 2b may be decompressed.
- the inclined surface 22 is gentle on the surface of the core material on the inclined surface 22 side with a small inclination angle, it is necessary to extend the second resin film portion 10B more greatly than the first resin film portion 10A during coating. There is no. Therefore, even if the resin film portion 10B that has already been extended covers the surface of the core material on the side of the inclined surface 22 having a small inclination angle, it is not necessary for excessive tensile strain to act on the film portion.
- the core material surface on the inclined surface 23 side with a large inclination angle has a steep slope of the inclined surface 23. Therefore, at the time of coating, the first resin film portion 10A is greatly extended as compared with the second resin film portion 10B. It is necessary to let Accordingly, since the first resin film portion 10A has a margin to extend as compared with the second resin film portion 10B, even if the first resin film portion 10A is extended more greatly, the first resin film portion 10A The portion 10A can be extended without excessive tensile strain acting.
- the resin film 10 is bonded to the surface of the core material 20 through the adhesive without causing excessive tensile strain to act on the surface of the core material 20, that is, without locally thinning the resin film. Can be coated. Then, the inside of the chamber 2 is adjusted to atmospheric pressure, the upper chamber 2a is opened, and the core material 20 covered with the resin film 10 is taken out.
- a core material made of a metal material is used as the core material, but this metal can include, for example, steel, cast iron, aluminum alloy, or titanium alloy, and is deformed by the heat from the heating unit.
- the material is not limited to a metal material, and may be a polymer resin such as a thermosetting resin. .
- the resin film preferably has a thickness of about 0.1 mm to 1 mm, and the material is not particularly limited as long as it can be extended. Considering that the resin is easily extended by the heat of the heating unit, for example, a thermoplastic resin such as a resin such as PP, PA, or PET is preferable.
- FIG. 6 is a schematic cross-sectional view for explaining a step of arranging the core material and the resin film in the resin film coating method according to the second embodiment of the present invention
- FIG. It is a typical perspective view for demonstrating the arrangement
- FIG. 8 is typical sectional drawing for demonstrating the process of extending a resin film among the coating methods of the resin film which concerns on 2nd embodiment of this invention.
- the resin film 10 is coated on the surface of the core material 30 using the coating apparatus 1B.
- the core material 30 has a convex portion 30 ⁇ / b> A formed on the outer peripheral portion of the core material surface. Similar to the first embodiment, the convex portion 30 ⁇ / b> A includes an inclined surface 32 with a small inclination angle, an inclined surface 33 with a large inclination angle, and a ridge line 31 formed by these inclined surfaces 32 and 33. Yes.
- the inclined surface 33 with a large inclination angle is arranged on the inner side (toward the center of the core material surface), and the inclined surface 32 with a small inclination angle is arranged on the outer side (toward the outer surface of the core material surface). It is formed so that.
- the inclined surfaces 32 and 33 form a ridge line 31 having four sides on the top of the convex portion 30A. In this way, by forming the convex portion 30A continuous on the outer peripheral portion of the core material surface, the concave portion 34 is formed on the core material surface.
- the first heating unit 8 ⁇ / b> C includes a resin film coated on the inclined surface 33 side having a large inclination angle, that is, a resin film portion (first resin film portion) coated on the inner side of the ridge line 21. ) It is arranged to heat 10C.
- the second heating unit 8D heats the resin film coated on the inclined surface 32 side having a small inclination angle, that is, the resin film portion (second resin film portion) 10D coated outside the ridge line 21.
- the second heating unit 8D generates heat at a higher temperature than the first heating unit 8C.
- FIG. 9 is typical sectional drawing for demonstrating the process of making a core material contact a resin film among the coating methods of the resin film which concerns on 2nd embodiment of this invention.
- FIG. 10 is typical sectional drawing for demonstrating the process of coat
- a core material 30 is prepared, and the core material 30 is placed on the mounting table 5 ⁇ / b> B in the lower chamber 2 b of the pair of chambers 2.
- the resin film 10 is disposed at a position facing the core surface so as to partition the internal space between the pair of chambers 2 using the film setting unit 4.
- the upper chamber 2a is moved toward the lower chamber 2b.
- the adhesive agent is apply
- the first resin film portion 10C is heated by the first heating unit 8C, and the second resin film portion 10D is heated by the second heating unit 8D.
- 2nd resin film part 10D is heated by high temperature compared with 10C of 1st resin film parts.
- the three-way valves 9a and 9b are operated, and the pressure in the lower chamber 2b is made relatively higher than the pressure in the upper chamber 2a by the pneumatic device 6.
- the second resin film portion 10D is heated to a higher temperature than the first resin film portion 10C, the resin film portion 10D covered on the inclined surface 32 side with a small inclination angle is Compared to the first resin film portion 10C, it extends greatly (see the solid arrow in FIG. 8).
- the mounting table 5 ⁇ / b> B is raised and the resin film 10 is brought into contact with the ridge line 31 of the convex portion 30 ⁇ / b> A of the core member 30.
- the resin film 10 is restrained by the ridgeline 31. Accordingly, the extension of the first resin film portion 10C and the extension of the second resin film portion 10D are less likely to affect each other across the ridge line 31.
- the pressure in the lower chamber 2b is made relatively lower than the pressure in the upper chamber 2a (see the solid line and broken line arrows in FIG. 10), so that the resin film 10 is cored.
- the resin film 10 is coated on the surface of the core material in accordance with the surface shape of the material 20.
- the inclined surface 32 is gentle on the surface of the core material on the inclined surface 32 side with a small inclination angle, it is necessary to extend the second resin film portion 10D more greatly than the first resin film portion 10C at the time of coating. There is no. Therefore, even if the resin film portion 10D that has already been extended covers the core material surface on the side of the inclined surface 32 having a small inclination angle, it is not necessary for excessive tensile strain to act on the film portion.
- the first resin film portion 10C is replaced with the second resin film portion at the time of coating. It is necessary to extend greatly compared to 10D. Therefore, since the first resin film portion 10C has a margin to extend as compared with the second resin film portion 10D, even if the first resin film portion 10C is extended more greatly, the first resin film portion 10C has a margin to extend. The portion 10C can be extended without being subjected to excessive tensile strain. The first resin film portion 10 ⁇ / b> C can be easily covered with the recess 34 inside the ridge line 31.
- a resin film is coated on a rectangular core material, but the outer shape of the core material is not limited to this as long as it has a convex portion on the surface.
- the core material may have a rhombus shape.
- 1A, 1B Coating device
- 2 Chamber
- 2a Upper chamber (the other chamber)
- 2b Lower chamber (one chamber)
- 3a Upper chamber moving device
- 3b Mounting table moving device (mounting table moving unit)
- 4 Film setting unit
- 6 Pressure device
- 7 Vacuum device
- 8A, 8C First heating unit
- 8B, 8D Second heating unit
- 9a 9b three-way valve
- 10B, 10D second resin film part
- 20, 30 core material
- 20A, 30A convex part, 21, 31 : Ridgeline, 22, 32: inclined surface with a small inclination angle, 23, 33: inclined surface with a large inclination angle
- 34 recess
Abstract
Description
Claims (6)
- 一対のチャンバにより形成された内部空間に芯材を配置し、該芯材の表面に樹脂フィルムを被覆する樹脂フィルムの被覆方法であって、
前記芯材として、前記芯材表面に凸部が形成され、該凸部に、傾斜角度の異なる少なくとも2つの傾斜面と、該2つの傾斜面により形成された稜線と、を有した芯材を準備する工程と、
前記芯材を一対のチャンバのうち一方のチャンバ内に配置する工程と、
前記一対のチャンバ間において内部空間を仕切るように、前記芯材表面に対向する位置に前記樹脂フィルムを配置する工程と、
前記稜線から前記傾斜角度の大きい傾斜面側に被覆される第一の樹脂フィルム部分に比べて、前記稜線から前記傾斜角度の小さい傾斜面側に被覆される第二の樹脂フィルム部分が、高温となるように樹脂フィルムを加熱する工程と、
前記一方のチャンバ内の圧力を、前記他方のチャンバ内の圧力よりも相対的に高くすることにより、前記樹脂フィルムが他方のチャンバ側に膨らむように、前記樹脂フィルムを伸展させる工程と、
前記伸展した樹脂フィルムに向かって前記芯材を移動させることにより、前記芯材の凸部の少なくとも前記稜線を、前記樹脂フィルムに接触させる工程と、
前記一方のチャンバ内の圧力を、前記他方のチャンバ内の圧力よりも相対的に低くすることにより、前記樹脂フィルムを前記芯材の表面形状に倣わせて、前記樹脂フィルムを前記芯材表面に被覆する工程と、を少なくとも含むことを特徴とする樹脂フィルムの被覆方法。 - 前記芯材を準備する工程において、前記傾斜角度の大きい傾斜面が内側に配置され、前記傾斜角度の小さい傾斜面が外側に配置されるように、前記凸部を前記芯材表面の外側周部に形成することにより、前記芯材表面に凹部が形成された芯材を準備し、
前記樹脂フィルムを加熱する工程において、前記稜線より内側に被覆される樹脂フィルム部分よりも、前記稜線よりも外側に被覆される樹脂フィルム部分が高温になるように、前記樹脂フィルムを加熱することを特徴とする請求項1に記載の樹脂フィルムの被覆方法。 - 前記樹脂フィルムを加熱する工程において、前記第二の樹脂フィルム部分を、樹脂フィルムの樹脂の軟化点温度以上になるように、加熱することを特徴とする請求項1又は2に記載の樹脂フィルムの被覆方法。
- 前記樹脂フィルムを加熱する工程と、前記樹脂フィルムを伸展させる工程と、を同時に行うことを特徴とする請求項1~3のいずれかに記載の樹脂フィルムの被覆方法。
- 表面に凸部が形成され、該凸部に、傾斜角度の異なる少なくとも2つの傾斜面と、該2つの傾斜面により形成された稜線とを有した芯材の表面に、樹脂フィルムを被覆する被覆装置であって、
前記芯材を配置するための内部空間が形成された一対のチャンバと、
前記一対のチャンバのうち一方のチャンバ内に前記芯材を載置する載置台と、
前記一対のチャンバ間において内部空間を仕切るように、前記載置台に対向する位置に前記樹脂フィルムをセットするフィルムセット部と、
前記稜線から前記傾斜角度の大きい傾斜面側に被覆される第一の樹脂フィルム部分を加熱する第一の加熱部と、前記稜線から前記傾斜角度の小さい傾斜面側に被覆される第二の樹脂フィルム部分を加熱する第二の加熱部と、を前記他方のチャンバ内に有し、前記第二の加熱部が前記第一の加熱部よりも高温に発熱する加熱部と、
前記一方のチャンバ内の圧力と前記他方のチャンバ内の圧力とに、相対的に差圧が発生するように、前記一対のチャンバ内の圧力を調整する圧力調整部と、
前記載置台を前記他方のチャンバ側に移動させる載置台移動部と、を少なくとも備えることを特徴とする樹脂フィルムの被覆装置。 - 前記被覆装置は、前記芯材として、前記傾斜角度の大きい傾斜面が内側に配置され、前記傾斜角度の小さい傾斜面が外側に配置されるように、前記凸部を前記芯材表面の外側周部に形成することにより、前記芯材表面に凹部が形成された芯材に、前記樹脂フィルムを被覆するための装置であり、
前記第一の加熱部は、前記稜線より内側に被覆される樹脂フィルム部分を加熱するように配置され、前記第二の加熱部は、前記稜線よりも外側に被覆される樹脂フィルム部分を加熱するように配置されていることを特徴とする請求項5に記載の樹脂フィルムの被覆装置。
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