JP2000102972A - Method for molding corrugation of resin-laminated metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of whitening and wrinkles in an organic synthetic resin film by making the inside radius of curvature of a crest part at least a specified one in a corrugated shape. SOLUTION: A resin-laminated metal plate 11 which contains an inorganic fibrous material and in which a transparent organic synthetic resin film is laminated on the surface is press-molded by a pair of molds in which press surfaces are corrugated. The inside radius of curvature R1 of the crest part 2 of the corrugated shaped is made at least 80 mm. The metal plate 11 as the organic synthetic resin film, when a double layer film in which he lower layer comprises the first transparent organic synthetic resin layer containing an inorganic fibrous material, and the upper layer comprises the second organic synthetic resin layer not containing a filler such as the inorganic fibrous material is laminated so that the lower layer is arranged 6o be the coated metal plate side, the inside radius of curvature R1 of the crest part 2 is made at least 80 mm, and the outside radius of curvature of the bottom part 3 is made at least about 100 mm. In this way, the generation of the whitening of the organic synthetic resin film in the crest parts 2 and wrinkles in the bottom part 3 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to press-forming a resin-laminated metal plate having a transparent organic synthetic resin film containing an inorganic fiber material laminated on a surface thereof by using a pair of dies having press-formed corrugations. The present invention relates to a method for preventing whitening and wrinkling of an organic synthetic resin film from occurring at a peak or a valley.

[0002]

2. Description of the Related Art In recent years, the design of houses has been advanced, and has been applied not only to walls but also to roofs. As part of this, the present inventors have devised a roof slab that gives the appearance of a Japanese style tile by forming a painted metal plate. As shown in FIG. 2 to FIG. 4, the roof slab 1 is provided with curved peaks 2 and valleys 3 alternately in a longitudinal direction on a square or rectangular painted metal plate, and the entire length is a corrugated sheet 4. One end of the corrugated plate 4 in the width direction has a web 5 projecting to the front side, and the other end has a web 5 projecting to the back side.
a, and flanges 6 and 6a projecting to the center side are protruded from both webs 5 and 5a to form a ridge-side engaging piece and an eaves-side engaging piece, and one longitudinal end has a front side. A folded piece 7 is provided on the other end, and a folded piece 7a is provided on the opposite side on the back side. Each of the folded pieces 7 is a ridge-direction engaging piece, and the webs 5, 5a and the flanges 6, 6a are also corrugated. It has become.

[0003] The manufacture of the roof shingle 1 is as follows. First, folded pieces 7 and 7a are formed on a flat coated metal sheet 8 by bender bending, and then webs 5 and 5a are formed by roll forming.
Lastly, the entire surface was corrugated by press molding. However, in order to increase the corrosion resistance, weather resistance, and scratch resistance of the roof panel 1, as shown in FIG. Transparent organic synthetic resin film 10 containing fiber material 9
An attempt was made to use a resin-laminated metal plate 11 on which was laminated. This resin laminated metal plate 11 is a laminated organic synthetic resin film 10.
Is transparent, so that the appearance of the coated metal plate 8 can be utilized, and the organic synthetic resin film 10 is made of an inorganic fiber material 9.
, The organic synthetic resin film 10 becomes flame-retardant, and the fire resistance when molded into the roof slab 1 can be enhanced. In addition, as the inorganic fiber material 9, in order to secure the transparency of the organic synthetic resin film 10, a transparent material such as glass fiber was used.

However, when the resin-laminated metal plate 11 having the above-described organic synthetic resin film 10 laminated on the surface thereof is press-formed into a corrugated shape, the transparent resin film is whitened at the corrugated ridges 2 to impair the appearance and performance. There was a problem that would.

In order to further enhance the corrosion resistance and weather resistance of the roof panel 1, an organic synthetic resin film 10 as shown in FIG.
As shown in the figure, the lower layer is composed of a transparent first organic synthetic resin layer 12 containing an inorganic fiber material 9 and the upper layer is composed of a second organic synthetic resin layer 13 containing no filler. When the corrugated roof plate 1 is manufactured in the above-described manner using the resin laminated metal plate 11 laminated so as to be on the plate 8 side, there is a problem that wrinkles are generated in the valleys 3 and appearance and performance are impaired.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for forming a corrugated resin metal plate, which eliminates the problem of whitening and wrinkling of the organic synthetic resin film.

[0007]

According to the present invention, a resin laminated metal plate having a transparent organic synthetic resin film containing an inorganic fiber material laminated on a surface thereof is formed into a corrugated shape by a pair of dies having a corrugated press surface. The press molding method is characterized in that the corrugated shape is such that the inner radius of curvature of the peak is 80 mm or more.

[0008]

The present inventors have investigated the cause of whitening at the peaks of the waveform. As a result, since the inorganic fiber material does not follow the deformation of the metal plate into the waveform, a gap is formed at the interface between the inorganic fiber material and the resin. It was found that this was caused by the emergence of the inorganic fiber material. Then, the present inventors determined the minimum curvature radius at which the inorganic fiber material does not protrude by variously changing the inner radius of curvature of the crests. Here, the inside radius of curvature R ₁ of the peak portion means a radius of curvature on the back side where the organic synthetic resin film 10 is not laminated on the metal plate 12 as shown in FIG.

[0009] Also, a multi-layer film in which the resin laminated metal plate comprises a lower layer of a transparent first organic synthetic resin layer containing an inorganic fiber material and an upper layer of an upper layer of a second organic synthetic resin layer containing no filler. When an organic synthetic resin film was used, the cause of the wrinkles generated in the valleys was investigated, and it was found that the upper layer of the multilayer film was peeled from the lower layer. Then, it was found that the outer radius of curvature of the valley portion should be set to 100 mm or more in order to prevent this peeling. Here, the outer radius of curvature R ₂ of the valley is
1 means a radius of curvature on the surface side where the organic synthetic resin film 10 is laminated on the metal plate 12 as shown in FIG.

In the present invention, when the organic synthetic resin film is a single-layer film, the organic synthetic resin is a vinyl chloride resin, a polyethylene terephthalate resin, an acrylic resin, a polyvinyl fluoride resin, a polyvinylidene fluoride resin, and a tetrafluoroethylene resin. It is preferable that the content of the inorganic fiber material is 4 to 15 parts by weight based on 100 parts by weight of the resin such as a resin such as an ethylene copolymer. Further, in the case of a multilayer film, the lower layer is an ethylene-vinyl acetate copolymer, an ethylene-methyl acrylate copolymer, a butyral resin, a urethane resin,
The content of the inorganic fiber material is 4 to 15 parts by weight based on 100 parts by weight of the resin such as a silicone resin, and the upper layer is a vinyl chloride resin, a polyethylene terephthalate resin, an acrylic resin, a polyfluorinated resin. It is preferable to use a resin such as a vinyl resin, a polyvinylidene fluoride resin, and a tetrafluoroethylene-ethylene copolymer.

The metal plate is not limited to a conventional coated metal plate, but may be a cold-rolled steel plate, various types of plated steel plates such as zinc-based, aluminum-based, and zinc-aluminum-based alloys, stainless steel plates, aluminum plates, and the like.

[0012]

EXAMPLE 1 An organic synthetic resin film (thickness: 50 .mu.m) in which 5 parts by weight of short glass fiber was blended with 100 parts by weight of a tetrafluoroethylene-ethylene copolymer was subjected to two heat-sealing processes. -G2
A resin-coated steel sheet was manufactured by laminating on a surface of a baked steel sheet (plate thickness: 0.4 mm, resin of the overcoating film: polyester resin, color tone: blue). Thereafter, the steel plate was inserted into a pair of dies of a press machine between press-formed surfaces of various shapes and press-formed. The height of the peaks, the pitch of the peaks, the inner radius of curvature of the peaks, and the outer radius of curvature of the troughs obtained in Table 1 and the wrinkles at the peaks and wrinkles at the peaks of the organic synthetic resin film are obtained. Indicates the occurrence state.

[0013]

[Table 1]

Example 2 In Example 1, a resin-laminated steel sheet was prepared by mixing a lower layer (thickness: 200 μm) in which 10 parts by weight of short glass fiber was mixed with 100 parts by weight of an ethylene-vinyl acetate copolymer and tetrafluoride. Upper layer of ethylene-ethylene copolymer (thickness 50μ)
m) was laminated on the surface of a two-coat, two-bake coated steel sheet (plate thickness: 0.4 mm, resin of the overcoating film: polyester resin, color tone: blue) by a heat fusion method. One used. Table 2 shows the height of the peaks, the pitch of the peaks, the inner radius of curvature of the peaks, the outer radius of curvature of the troughs, and the wrinkles at the peaks and whitening of the organic synthetic resin film obtained in Table 2. Indicates the occurrence state.

[0015]

[Table 2]

[0016]

As described above, a resin-laminated metal plate obtained by laminating a transparent organic synthetic resin film containing an inorganic fiber material on the surface is press-formed into a corrugated shape by a pair of dies having a corrugated press surface. In the method, if the wave shape is such that the inner radius of curvature of the peak is 80 mm or more, the whitening of the organic synthetic resin film in the peak can be prevented, and the resin laminated metal plate is an organic synthetic resin film, and the lower layer is A multilayer film comprising a transparent first organic synthetic resin layer containing an inorganic fiber material and a second organic synthetic resin layer not containing a filler such as an inorganic fiber material is used as a lower layer on the side of a painted metal plate. In the case where the ridges are laminated in such a manner, the waveform shape is such that the inner radius of curvature of the peak is 80 mm or more and the outer radius of curvature of the valley is 100 m.
When it is set to m or more, in addition to whitening of the organic synthetic resin film at the peaks, wrinkling at the valleys can be prevented. Therefore, if the resin-laminated metal sheet is formed into a corrugated shape by the method of the present invention, a roof sheet having good appearance and performance can be manufactured.

[Brief description of the drawings]

FIG. 1 shows an inner radius of curvature of a peak and an outer radius of curvature of a valley of a corrugated sheet.

FIG. 2 is a perspective view of a conventional shingle.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 shows a schematic sectional structure of a resin laminated metal plate.

FIG. 6 shows a schematic sectional structure of another resin laminated metal plate.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Roof board 2 Mountain part 3 Valley part 4 Corrugated sheet 5, 5a Web 6, 6a Flange 7, 7a Folding piece 8 Painted metal plate 9 Inorganic fiber material 10 Organic synthetic resin film 11 Resin laminated metal plate 12 First organic synthetic resin layer 13 Second organic synthetic resin layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) // B29K 105: 06 305: 00 B29L 9:00 F term (Reference) 2E108 CC01 CV06 GG19 4F100 AA01A AB01B AK01A AK01C AK17 AL05A BA02 BA03 BA07 BA10A BA10B CA23A CC10B DD13 DG01A EJ283 GB07 JK14 JN01A JN30 YY00 4F209 AA16 AB25 AD03 AG03 AG05 AH47 NA08 NB01 NG02 NG05

Claims (2)

[Claims] 1. A method for press-forming a resin-laminated metal plate having a transparent organic synthetic resin film containing an inorganic fiber material laminated on a surface thereof in a pair of dies having a press-formed corrugated shape. The inside radius of curvature of the peak is 80 mm
A corrugated molding method for a resin laminated metal sheet, characterized in that the method is as described above. 2. A resin laminated metal plate as an organic synthetic resin film, wherein a lower layer comprises a transparent first organic synthetic resin layer containing an inorganic fiber material, and an upper layer comprises a second organic synthetic resin layer containing no filler. When the multilayer film is laminated such that the lower layer is on the side of the painted metal plate, the corrugated shape is such that the inner radius of curvature of the peak is 80 mm or more and the outer radius of curvature of the valley is 100 mm or more. The method for forming a corrugated resin sheet according to claim 1, wherein: