JP2001121496A - Method and device for trimming - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide method and device for trimming capable of surely removing an excess part of a sheet from a laminated product, standing a long period use without generating deterioration due to wear in a sheet cutting means, unnecessitating frequent maintenance and exchanges of the sheet cutting means an minimizing cost and trimming cost. SOLUTION: This method is for removing an excess part which is not laminated on a base material of a sheet from a laminated product made of the base material and the sheet laminated on the base material. After at least of the excess part of the sheet is cooled and is made fragile, the excess part is removed from the laminated product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a resin molded article and various other articles, which are used when a sheet is bonded to a base material and integrated with the base material to form a laminated product. The present invention relates to a trimming method and a trimming method for removing an excess portion that protrudes or remains so as to cover a window portion, a cutout opening, and the like, that is, an unnecessary portion that is not laminated on a base material, from the laminate.

[0002]

2. Description of the Related Art Hitherto, various methods have been proposed for laminating a sheet provided with decorations or the like on the surface of various substrates. For example, as described in JP-B-50-19132 and JP-B-43-27488, a sheet is placed between both a female mold and a male mold for injection molding, and then the molten resin is molded. Injection-filling, simultaneous molding of a resin molded product (substrate) and bonding and laminating a sheet on its surface, so-called injection molding simultaneous painting method, JP-B-56-45768 and JP-B-60-58014. As described in the above, a sheet is placed on a surface of a three-dimensional article (substrate) already formed, such as a resin molded article, with an adhesive therebetween so as to be in contact with or opposed to the three-dimensional article. There is a so-called vacuum press lamination method in which a sheet is laminated on the surface of a three-dimensional article by a pressure difference caused by vacuum suction. In addition, Japanese Patent Publication No. 61-58
No. 95, Japanese Patent Publication No. 46-38439, etc., the sheet is supplied in the direction along the long axis of a columnar base material such as a column, a polygonal column or the like via an adhesive layer therebetween. Meanwhile, there is a so-called lapping method or the like in which a plurality of rollers having different directions are pressure-bonded and laminated so as to be wound around the peripheral side surface of the columnar article.

[0003] In the above, when forming a molded article as a substrate, at the same time, the sheet is integrated,
This is a method of integrating a sheet with a molded article as a base material or an article as a base material already formed by cutting or the like. In the above, the sheets are laminated and integrated without being stretched. However, in the above case, the sheets are usually stretched and laminated and integrated.

[0004] By the way, as described above, when the surface to be laminated of the substrate on which the sheets are laminated is not flat, a sheet larger than the surface to be laminated of the substrate is prepared, and the surface to be laminated of the substrate is prepared. After laminating and integrating the sheets to obtain a laminated product (semi-finished product), trimming is performed to cut off the surplus portion protruding from the base material from the laminated product. In particular, when the sheet is stretch-formed as in the case of, since it is necessary to fix and hold the outer peripheral edge of the sheet for stretch forming,
A surplus part always occurs in the sheet, and the laminated product is a product (product)
In order to complete it, it is required to trim the surplus part.

Hereinafter, trimming of the surplus portion will be briefly described with reference to FIG. FIG. 4 shows a laminated product 1 produced by the above-mentioned simultaneous injection molding and painting method. The laminated product 1 has a base material 2 made of a resin molded product in the shape of a thin dish-shaped panel with a rounded corner in a plan view having a hollow window 3 formed in the center, and a front surface (lower surface) of the base material 2. And a sheet 5 (adhesive laminated portion 5S) which is also adhesively laminated on the inner peripheral surface 3a so as to enter the hollow window portion 3 and close it.

Before the sheet 5 is trimmed, that is, at the time when the simultaneous painting by injection molding is completed, the sheet 5 is laminated on the base material 2 which protrudes to the outer periphery of the laminated product 1 and closes the hollow window 3. Although the surplus parts 5A and 5B shown by the imaginary lines in the drawings are attached, the surplus parts 5A and 5B
B is trimmed after completion of the simultaneous painting by injection molding to obtain a product.

Conventionally, as a method of trimming the surplus portions 5A and 5B, (A) a method of performing a manual operation using a cutter or the like, and (B) a cutting means such as a blade or a laser light source is controlled by NC (numerical control). A method of automatically and mechanically moving the workpiece along a cutting position (line) by a router, a robot, or the like. (C) A cutting blade (usually an annular cutting tool) corresponding to the shape of the surplus portion (cutting position) How to cut using
(D) The applicant of the present application has previously proposed (Japanese Unexamined Patent Application Publication No.
No. 114898), a method in which a shearing force and a tensile stress are generated at a cutting portion by using a pushing cutting die and a driven cutting die to cut off, and (E) injection molding as seen in Japanese Patent Publication No. 5-72246. A method in which the edges of the cavities (or cores) of the male and female molds used for simultaneous painting are used as blades for cutting a sheet by shearing, and (F) a method in which solid particles such as beads collide with a cutting portion at high speed. , (G)
A method of applying a water jet or an ultrasonic wave (shock wave) to a cut portion is known.

[0008]

However, the trimming methods and apparatuses (A), (B) and (C) described above are already proposed.
(D), (E), (F), and (G) have the following problems. That is, in the manual trimming method using the cutter of the above (A), it takes a long time to trim a complicated shape, and there is a dislike that the trimming cost is increased, and a great deal of labor is required for the operator. This means that the finish is not stable.

In the trimming method / apparatus using the NC router or robot described in the above (B), it is necessary to precisely control the movement of the cutting means, and it is necessary to teach the apparatus to trim the shape to be trimmed for each article. Because of the necessity, the initial setting is complicated, and the apparatus tends to be expensive. In the trimming methods and apparatuses (C), (D), and (E), as the number of sheet cuts increases,
Since the blade part wears and the sharpness deteriorates, frequent maintenance of the blade part is required, and the life of the blade part is short. It was necessary to replace the entire molding die and the like, which increased the cost and, as a result, disliked increasing the trimming cost.

In the trimming methods and apparatuses (F) and (D), it may be difficult to cut the sheet neatly depending on the characteristics (rigidity, tensile strength, etc.) of the sheet to be cut. In addition, solid particles and water jets are applied to the adhesive laminate 5 just above the substrate to be the final product.
If it hits the S sheet, the product will be damaged. Further, in the trimming methods and apparatuses (C) to (G), since a very large stress acts on the cut portion of the sheet, there is also a problem that the cut edge is whitened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to remove a surplus portion of a sheet from a laminated product without fail while having a relatively simple structure. The sheet cutting means is not deteriorated due to wear and the like, does not require long-term use, does not require frequent maintenance or replacement of the sheet cutting means, and can reduce equipment costs and trimming costs as much as possible. An object of the present invention is to provide a trimming method and apparatus which can be lowered.

[0012]

In order to achieve the above-mentioned object, a trimming method according to the present invention comprises a step of laminating a laminate comprising a substrate and a sheet laminated thereon onto the substrate of the sheets. A method for removing a surplus part that is not, basically, after cooling at least the surplus part of the sheet to embrittle it, removing the surplus part from the laminate. I have. In a preferred aspect of the present invention, at least the surplus portion of the sheet is cooled by a low-temperature fluid such as liquid nitrogen.

In this case, the entire laminate including the surplus portion may be cooled by immersing it in a low-temperature fluid such as liquid nitrogen, or only the surplus portion may be entirely cooled by a low-temperature fluid such as liquid nitrogen. Or a low-temperature fluid such as liquid nitrogen may be applied only to the peripheral portion of the surplus portion, which is at least a boundary between the laminated portion and the laminated portion laminated on the base material. Although it may be made to cool by spraying, when cooling the part that is adhesively laminated on the base material, there is a possibility that the part is broken,
It is preferable to cool only the surplus part as much as possible.

In another preferred aspect of the present invention, the surplus portion cooled and embrittled contains air,
A fluid such as water or liquid nitrogen, or solid particles such as beads are sprayed to collide with each other, and the surplus portion is removed by utilizing the collision pressure. As a method for removing the surplus portion that has been cooled and embrittled, a method other than the above-described method using the collision pressure, for example, a cutting tool or the like is provided at a boundary portion (trimming line) between the adhesive lamination portion and the surplus portion. After making a cut (scratch) with a heating wire or the like, a method of hitting or bending an excess portion to remove the surplus portion may be adopted.

[0015] The cooling temperature of the surplus portion may be a temperature at which the tensile (breaking) strength of at least one of the width direction of the sheet and the length (longitudinal) direction orthogonal thereto is 3 kg / cm or less. On the other hand, a trimming device according to the present invention is for performing the trimming method, and includes a cooling embrittlement unit for cooling and embrittlement at least the surplus portion of the sheet; Air, water, a fluid such as liquid nitrogen, or solid particles such as beads are sprayed on the surplus portion to collide with the surplus portion, and a surplus portion removing means for removing the surplus portion using the collision pressure is provided. Prepare.

In the trimming method and apparatus according to the present invention having the above-described structure, for example, the sheet (having a thickness of 125 μm) made of a resin containing acrylic as a main component
At least the surplus portion is made of a low-temperature fluid such as liquid nitrogen, liquid helium, or the like, and has a surface temperature of -5, for example.
Cool to about 0 ° C. By cooling the sheet in this manner, the sheet has a tensile strength at room temperature of 6 kg / cm or more, whereas the tensile strength drops to 3 kg / cm or less, and becomes brittle.

Subsequently, preferably, a fluid such as air, water, liquid nitrogen, or the like is added to (at least the excess portion of) the sheet embrittled by cooling as described above.
Solid particles such as inorganic beads such as zinc and silica and organic beads such as nylon and polycarbonate are sprayed and collided. Accordingly, the surplus portion is not bonded and laminated on the base material due to the collision pressure of the fluid or the like, and is removed so as to be finely crushed with the boundary portion with the bonded laminated portion as a boundary. In this case, since the adhesive laminated portion is adhesively laminated on the base material, it is cooled together with the surplus portion, and even if the fluid or the like is sprayed and collided, it is not crushed, It does not peel off from the substrate.

As described above, in the trimming method and apparatus according to the present invention, at least a surplus portion of the sheet is cooled and embrittled, and then the surplus portion is blasted with, for example, a fluid or the like to collide with the laminated product. , The surplus portion of the sheet can be reliably removed from the laminate, and the cut edge is not much whitened as compared with the case where a blade or the like is used. The embrittlement means and the excess part removing means) do not deteriorate due to wear or the like, endure long-term use, and do not require frequent maintenance or replacement. In addition to the above,
Compared to the case where a robot or the like is used, there is no need to strictly control the positioning and operation of the cutting means, so that the apparatus cost and the trimming cost can be reduced.

The method of laminating the sheet and the base material on the laminated product to which the present invention can be applied is not limited. For example, the injection molding simultaneous painting method, the vacuum press laminating method, the lapping method, and the like described above. Therefore, the material of the base material is not particularly limited. If the material used in the simultaneous molding method for injection molding is acrylic resin, vinyl chloride resin, ABS (acrylonitrile-butadiene-styrene copolymer) resin, polycarbonate resin, thermoplastic resin such as polyethylene, polypropylene, polystyrene, etc. And curable resins such as two-component curable urethane resins and phenolic resins. In addition, in the case of a vacuum press laminating method or a lapping method, as the material of the base material, in addition to the above various resins, metals such as aluminum, iron, stainless steel, brass or metal alloys, woody plywood, woody Wood, such as veneer and medium-density fiberboard (MDF), ceramics, such as glass, ceramics, and tiles; cement, such as ALC (lightweight cellular concrete) and GRC (glass fiber reinforced concrete); Further, the shape of the base material is a rod-like body such as a flat plate, a curved plate, and a polygonal pillar.

Examples of the sheet that can be trimmed in the present invention include a single layer of a sheet for protecting the surface of the base material, or a decorative sheet obtained by subjecting a sheet to a decorative treatment. A typical example of the sheet is a resin sheet. Examples of the resin of the resin sheet include polyvinyl chloride, polyvinylidene chloride, vinyl chloride resins such as vinyl acetate-vinyl chloride copolymer, polystyrene, and A.
Styrene resin such as BS resin, acrylic resin such as PMMA (polymethyl methacrylate), polybutyl methacrylate, polyacrylonitrile, nylon 6, nylon 6
6, polyolefin resins such as polyethylene, polypropylene, polymethylbenthene, olefinic thermoplastic elastomers, cellulose resins such as cellulose acetate and nitrocellulose, polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate-isophthalate copolymer Coalesce, polyester resins such as polyarylate, rubber resins such as butadiene rubber, chloroprene rubber, and silicone rubber; fluororesins such as polyvinylidene fluoride and polyvinyl fluoride; urethane thermoplastic elastomer; and polycarbonate. The base sheet is a single-layer body of these resins or a laminate comprising multiple layers.

Among these resins, rubber-based resins and thermoplastic elastomers are hard to be cut at room temperature due to their physical properties, and acrylic resins such as PMMA, polycarbonate, polystyrene and the like are not easily cut at room temperature due to their physical properties. However, according to the trimming method of the present invention, the sheet is cooled and embrittled, so that the surplus portion can be reliably removed from any resin. As the sheet, in addition to the resin sheet, those which become brittle when cooled, for example, paper, woven fabric, non-woven fabric, metal sheet (metal foil)
And a laminate of these and a resin sheet. The sheet is usually the above-mentioned sheet alone or the above-mentioned sheet which has been appropriately subjected to a decoration process or the like.

Next, the decorative treatment applied to the resin sheet includes coloring the base sheet itself by kneading a pigment or a dye, forming a decorative layer composed of a pattern or a metal thin film layer, and forming an uneven pattern. Formation and the like. In the decoration by mixing a pigment or the like into a sheet, a decoration process is performed to make the sheet colorless and transparent or colored and transparent, or colorless and opaque or colored and opaque. Examples of the pigment include inorganic pigments such as titanium white, carbon black, ultramarine, red iron oxide, and graphite, and organic pigments or dyes such as quinacridone, isoindolinone, phthalocyanine blue, and aniline black. In addition, extenders (fillers) such as calcium carbonate, silica (silicon dioxide), alumina (aluminum oxide), and barium sulfate are appropriately added as needed.

As a printing method for forming the decorative layer by picture printing, a usual printing means such as gravure printing, offset printing, letterpress printing, silk screen printing or the like is used. In addition, an ink layer on the release sheet, and a transfer sheet on which an adhesive layer is further formed as necessary are prepared in advance, and the ink layer formed on the transfer sheet is pressurized or pressurized and heated. It is also possible to use a so-called transfer printing method in which the image is transferred to a surface on which a decorative layer (ink layer) is to be formed. The pattern of the picture, for example, wood grain pattern,
Stone patterns, geometric patterns such as characters and figures, and solid solids are all optional. The decorative layer (ink layer) by pattern printing may be formed on the front side or the back side of the sheet or between two layers of the sheet.

In order to form the decorative layer as a metal thin film layer, a metal such as aluminum or chromium is formed as a thin film by vacuum evaporation or the like. The metal thin film may be formed on the entire surface, or may be formed in a pattern so as to obtain the above-described pattern. Is formed in a desired pattern, a metal thin film layer is formed by vapor deposition on the entire surface from the top, and then washed with water to remove the metal thin film layer immediately above the removal layer together with the above-mentioned removal layer. Of course, the metal thin film layer previously formed on the transfer sheet may be transferred and formed on the surface on which the decorative layer is to be formed by the transfer printing method.

As the decoration process, an uneven pattern may be formed. In order to form the concavo-convex pattern, a concavo-convex pattern having a concavo-convex shape is formed on the surface of the sheet, such as a resin sheet, by hairline processing, sand blasting, embossing, or the like. For example, embossing is performed by pressing an embossing plate on the surface of a heat-softened resin sheet using a hot press type sheet or a rotary type embossing machine, and shaping the embossed shape of the embossed plate surface. To form In addition, the concave portions of the uneven pattern formed on the resin sheet may be filled with a coloring ink by a known wiping method.

On the back surface of the decorative sheet, in order to improve the adhesiveness to the base material such as a molded product to be laminated, the sheet surface is subjected to a corona discharge treatment, a known adhesive treatment such as various types of primer coating, or a heat-sensitive type. A material to which an adhesive layer is appropriately applied is used.
For such an adhesive layer, a resin such as a thermoplastic resin, a thermosetting resin, or an ionomer is used. Specific examples of the resin, ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxyethyl cellulose, cellulose derivatives such as cellulose acetate propionate,
Styrene resins or styrene copolymers such as polystyrene and poly-α-methylstyrene; acrylic resins such as poly (butyl methacrylate); polyvinyl chloride; polyvinyl acetate; vinyl chloride-vinyl acetate copolymer; ethylene-vinyl alcohol Copolymers, vinyl copolymers such as polyvinyl butyral, rosin, rosin modified maleic resin, rosin modified phenol resin, rosin ester resins such as polymerized rosin, polyisobrene rubber, polyisobutyl rubber, styrene butadiene rubber, butadiene acrylonitrile rubber Such as rubber-based resin, cumarone resin, vinyl toluene resin,
One or a mixture of two or more natural or synthetic resins such as polyamide resins and polychlorinated olefins, and various ionomers are used.

[0027]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show a state of an embodiment of a trimming method according to the present invention.
In the trimming method of this embodiment, the same laminated product 1 as that shown in FIG. 4 described above, that is, the laminated product 1 obtained by simultaneous painting with injection molding,
In this case, the outer peripheral surplus portion 5A protruding to the outer periphery and the window surplus portion 5B closing the window 3 are removed together and trimmed.

The laminated product 1 obtained by the simultaneous painting with the injection molding has a rectangular shape with a rounded corner in a plan view having a hollow window portion 3 formed in the center similarly to the one shown in FIG. The substrate 2 made of a dish-shaped panel-shaped resin molded product is adhered and laminated on almost the entire surface side (upper surface side) of the substrate 2 excluding the lower surface, and enters into the hollow window portion 3 to be removed therefrom. And a sheet 5 that is also adhesively laminated on the inner peripheral surface 3a so as to close it. The base material 2 is made of a heat-resistant ABS material, and has a length of about 100 mm, a width of about 150 mm,
The depth of the hollow window 3 is about 20 mm.

As the sheet 5, here, a base sheet made of an acrylic resin (having a thickness of 125 μm) and a decorative layer made of a printing ink laminated thereon by a gravure printing method (the binder is made of acrylic resin and chloride) A 1: 1 weight ratio mixture of vinyl acetate / vinyl acetate) and an adhesive layer (using a mixture of vinyl chloride / vinyl acetate copolymer) as a binder. A laminated sheet (laminated sheet) used as a final product while being tightly integrated with the (injection resin molded product) is used. The decorative layer (pattern layer) has a grain pattern obtained by combining three colors of a pattern plate, and the adhesive layer uses a gravure solid printing plate (screen depth: 60 μm) having a screen ruling of 40 lines / cm. This is a layer having a thickness of 2 μm formed by two-color printing.

Here, the outer peripheral surplus portion 5A and the window surplus portion 5B of the sheet 5 bonded and laminated on the base material 2 are:
It is bent at a substantially right angle from the adhesive laminated portion and extends horizontally, and the cut portions thereof are located at the lower end portion (root portion) of the outer peripheral surface of the laminated product 1 and the lower end portion (root portion) of the inner peripheral surface 3a of the window 3. ). The outer peripheral surplus portion 5A and the window surplus portion 5B are portions that were brought into contact with the male and female parting surfaces at the time of simultaneous injection molding and painting.

In order to carry out the trimming method of the present embodiment, at least the outer peripheral surplus portion 5A of the sheet 5
As a cooling embrittlement means for cooling and embrittlement of the window surplus portion 5B, as shown in FIG. 1, a cooling container 10 storing liquid nitrogen N is provided, and as a surplus portion removing means. A fluid (here, water W) is sprayed on the outer peripheral excess portion 5A and the window excess portion 5B that have been cooled and embrittled to collide with each other, and the outer peripheral excess portion 5A and the window excess are used by utilizing the collision pressure. A shower device 20 as shown in FIG. 2 (A) is provided to remove the portion 5B.

In the trimming method of this embodiment, first,
As shown in FIG. 1, the entire laminate 1 having the outer peripheral surplus portion 5A and the window surplus portion 5B is immersed in a cooling container 10 in which the liquid nitrogen N is stored. For example, it is cooled to about -50 ° C. By cooling the sheet 5 in this way, the sheet 5 has a tensile strength at room temperature of 6 kg / cm or more, whereas its tensile strength falls to 3 kg / cm or less,
Embrittles.

Subsequently, the laminate 1 in which the sheet 5 has been subjected to cooling embrittlement as described above is taken out, and FIG.
As shown in (A), it is arranged directly below the shower device 20. The shower device 20 has an annular outer peripheral nozzle 21 for spraying water W onto the outer peripheral surplus portion 5A and its vicinity (the outer peripheral portion of the adhesive laminated portion 5S).
And a circular inner nozzle 22 for spraying water W on the window surplus portion 5B and its vicinity (the inner peripheral portion of the adhesive laminated portion 5S), as shown in FIG. 2 (A). As shown in FIG.
Then, water W is sprayed and collided against the outer peripheral surplus portion 5A and the window surplus portion 5B.

As a result, the outer peripheral surplus portion 5A and the window surplus portion 5B are not bonded and laminated on the base material 2 due to the collision pressure of the water W, as shown in FIG. It is removed in such a manner that it is finely crushed (crushed pieces 5a, 5b) with the boundary portion with the adhesive laminated portion 5S as a boundary. In this case, since the adhesive laminated portion 5S is adhesively laminated on the base material 2, the adhesive laminated portion 5S is cooled together with the surplus portions 5A and 5B, and is crushed even if the water W is blown and collided. And does not peel off from the substrate 2.

In the above embodiment, the surplus portion 5A,
In order to cool 5B, the whole laminate 1 is immersed in a liquid nitrogen N solution, but instead, for example,
As shown in FIG. 3, a mask cover 40 made of a heat insulating material is placed so as to cover the portion 5S bonded and laminated on the base material 2, and liquid nitrogen N is sprayed from the injection nozzles 31 and 32, and surplus with the bonded laminated portion 5S. You may make it spray so that the boundary part with the parts 5A and 5B may be directed.

By doing so, only the portion (boundary portion) near the adhesive laminated portion 5S of the outer peripheral surplus portion 5A and the window extra portion 5B is cooled and embrittled, so that the adhesive laminated portion 5S is formed. It is less susceptible to deterioration due to cooling. In addition, after only the part (boundary part) near the adhesive lamination part 5S of the outer peripheral surplus part 5A and the window surplus part 5B is cooled and embrittled as described above, the same as in the above-described embodiment. As shown in FIG. 2A, the outer peripheral surplus portion 5A
Water W is sprayed toward the window surplus portion 5B to collide, and the collision pressure crushes the portion that has been embrittled by cooling so that the outer peripheral surplus portion 5A and the window surplus portion 5B are removed. Is done.

As described above, in the trimming method and apparatus according to the present invention, at least the excess portions 5A, 5A
After cooling and embrittlement of B, the surplus portions 5A and 5B are removed from the laminated product 1 by, for example, spraying a fluid or the like on the surplus portions 5A and 5B, so that the surplus portions 5A and 5B of the sheet 5 are removed. In addition to being able to be reliably removed from the laminate 1, the cut edge is not significantly whitened as compared with the case where a blade or the like is used, and the sheet cutting means (cooling embrittlement means 10, 31, 32 and excess part removal) Means 2
0) does not deteriorate due to wear and the like, withstands long-term use, and does not require frequent maintenance or replacement. In addition to the above, since it is not necessary to strictly control the positioning and operation of the cutting means as compared with the case where a robot or the like is used, the apparatus cost and the trimming cost can be reduced.

[0038]

As is apparent from the above description, according to the trimming method and apparatus according to the present invention, at least the excess portion of the sheet is cooled and embrittled, and then the fluid or the like is added to the excess portion. By spraying and colliding, the surplus portion of the sheet can be reliably removed from the laminate because it is removed from the laminate, and whitening of the cut is reduced as compared with the case where a blade or the like is used. This does not occur much, and the sheet cutting means (cooling embrittlement means and excess part removing means) does not deteriorate due to wear or the like, withstands long-term use, and does not require frequent maintenance or replacement. In addition to the above, since it is not necessary to strictly control the positioning and operation of the cutting means as compared with the case where a robot or the like is used, the apparatus cost and the trimming cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a state of a sheet cooling embrittlement step in an embodiment of a trimming method according to the present invention.

FIG. 2 is a schematic view showing a state of a step of removing a surplus part in one embodiment of the trimming method according to the present invention.

FIG. 3 is a schematic view showing a state of a sheet cooling embrittlement step in another embodiment of the trimming method according to the present invention.

FIG. 4 shows an example of a laminated product to which the present invention is applied;
(A) is a plan view, (B) is a cross-sectional view taken along the line XX of (A).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laminated product 2 Base material 3 Hollow window part 5 Sheet 5S Adhesive lamination part 5A Surplus outer periphery part 5B Window part excess part N Liquid nitrogen W Water 10 Cooling container 20 Shower device 31, 32 Injection nozzle

Claims (6)

[Claims] 1. A trimming method for removing a surplus portion of the sheet that is not laminated on the base material from a laminated product including a base material and a sheet laminated on the base material, the method comprising: A trimming method, comprising: after cooling and embrittlement of the surplus portion, removing the surplus portion from the laminate. 2. The trimming method according to claim 1, wherein at least the surplus portion of the sheet is cooled with a low-temperature fluid such as liquid nitrogen. 3. The trimming method according to claim 1, wherein the laminate including the surplus portion is immersed in a low-temperature fluid such as liquid nitrogen and cooled. 4. The cooling method according to claim 1, wherein a low-temperature fluid such as liquid nitrogen is sprayed on at least a peripheral portion of the surplus portion that is a boundary with a laminated portion laminated on the base material. Or the trimming method according to 2. 5. A method of spraying a fluid such as air, water, liquid nitrogen or a solid particle such as a bead onto the surplus portion which has been cooled and embrittled to cause the surplus portion to collide with the surplus portion. 5. The trimming method according to claim 1, wherein a portion is removed. 6. A trimming device for removing a surplus portion of the sheet, which is not laminated on the substrate, from a laminate comprising a substrate and a sheet laminated thereon, wherein at least one of the sheets Cooling embrittlement means for cooling and embrittlement of the surplus portion, and air, water, fluid such as liquid nitrogen, or spraying solid particles such as beads, on the surplus portion cooled and embrittled. And a surplus portion removing means for removing the surplus portion by utilizing the collision pressure.