Manufacturing method and manufacturing device for wrapping substrate

Abstract

To provide a manufacturing method and a manufacturing apparatus for a wrapping base material that can reduce product defects due to cut pieces.SOLUTION: There is provided a manufacturing method and a manufacturing apparatus for a wrapping base material. The method and the apparatus are configured in that: a supply interval of a base material 2 is controlled to be longer than a sum of a length for wrapping a rear side surface 4 of a current base material and a length for wrapping a front side surface of a next base material; and when cutting in advance an overlap of a wrapping sheet 1, the overlap being caused at four corners of the base material during folding on a side of the base material, cut pieces caused on the left and right are cut out so as to integrate through a surplus part between the base material and the base material. According to the present invention, cut pieces are integrally cut out into a large cut piece, mixture of cut pieces into a product can be prevented, and product defects caused by cut pieces can be reduced.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method and an apparatus for manufacturing a wrapping substrate that can reduce product defects caused by the inclusion of cut pieces of a wrapping sheet. [Background technology]

[0002] Conventionally, wrapping substrates in which a resin decorative sheet or the like is wrapped around a board-shaped substrate such as plywood, PB (Particle Board), or MDF (Midium Density Fiber Board) have been widely used for flooring materials, closets, shelves, fittings, etc., from the standpoints of design, price, etc. This wrapping substrate is usually wrapped on a total of five surfaces, including the top surface and four side surfaces.

[0003] As a method for continuously manufacturing such wrapping base materials, there is a method in which a wrapping sheet (hereinafter sometimes referred to as a sheet) that is wider on the left and right than the base material is used, cut so that the front and back lengths are longer than the base material, and the sheet is adhered to the top surface while also being folded and adhered to the front, back, left, and right sides to wrap five sides. In this case, when the sheet is folded to the front, back, left, and right sides, the sheet overlaps at the four corners of the base material, so these overlapping parts are often cut off in advance (for example, Patent Document 1 and Patent Document 2). The cut pieces generated at this time are small when the base material is thin or the width of the fold back to the side is narrow. For example, in the case of a thin flooring material or when only a thin thickness is used to cover the side surface on the top surface, the width of the fold back to the side is narrow, so the cut pieces are small. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-7829 A [Patent Document 2] JP 2017-52286 A Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, when folding the wrapping sheet to the sides, overlapping portions of the sheet are generated at the four corners of the base material. When removing these overlapping portions in advance, pieces that are cut off may get mixed into the product and cause product defects. Product defects are particularly likely to occur when the cut pieces are small. An object of the present invention is to provide a method and device for manufacturing a wrapping base material that can reduce product defects caused by these cut pieces. [Means for solving the problem]

[0006] As a result of various investigations to achieve the above object, the inventors came up with the idea of ​​cutting out the pieces generated on the left and right sides of the sheet as a single unit to make the pieces larger and to prevent the pieces from being mixed into the product, thus arriving at the present invention. 1. A method for continuously wrapping the top surface, left and right side surfaces (left and right side surfaces), and front and rear side surfaces (front and rear side surfaces) of a rectangular substrate with a wrapping sheet, (1) A process of continuously applying adhesive to a wrapping sheet that is wider than the width of the substrate by an amount corresponding to the width of the wrapping sheet to be applied to the left and right sides; (2) supplying the substrate to a bonding means with a wrapping sheet at an interval longer than the sum of the length of the substrate to be wrapped around the rear side of the current substrate and the length of the substrate to be wrapped around the front side of the next substrate; (3) A process of attaching the wrapping sheet; (4) While cutting the wrapping sheet, a step of cutting off overlapping portions of the wrapping sheet that are generated at the four corners of the base material when the wrapping sheet is folded to the side, and cutting off the cut pieces generated on the left and right sides so that the cut pieces are integrated through the excess portions between the base materials; (5) a step of folding and adhering the wrapping sheet protruding from the left and right side surfaces of the base material to the left and right side surfaces of the base material; (6) A step of folding and adhering the wrapping sheet protruding from the front and rear side surfaces of the base material to the front and rear side surfaces of the base material; A method for producing a lapping substrate comprising the steps of: 2. A method for manufacturing a wrapping substrate as described above in claim 1, wherein in step (4), the rear cut-out portion of the wrapping sheet of the current substrate and the front cut-out portion of the wrapping sheet of the next substrate are cut so as to be integrated with each other. 3. An apparatus for continuously wrapping the top surface, front and rear sides (front and rear sides), and left and right sides (left and right sides) of a rectangular substrate with a wrapping sheet, (1) A means for continuously applying adhesive to a wrapping sheet that is wider than the width of the base material by an amount corresponding to wrapping the left and right sides; (2) a means for supplying the substrate to a bonding means with a wrapping sheet at an interval longer than the sum of the length of the substrate to be wrapped around the rear side of the current substrate and the length of the substrate to be wrapped around the front side of the next substrate; (3) A means for attaching the wrapping sheet; (4) While cutting the wrapping sheet, A means for cutting off in advance overlapping portions of the wrapping sheet that are generated at the four corners of the base material when the wrapping sheet is folded to the side, and cutting off the cut pieces generated on the left and right sides so that they are integrated via the excess portions between the base materials; (5) A means for folding and adhering the wrapping sheet protruding from the left and right side surfaces of the base material to the left and right side surfaces of the base material; (6) A means for folding and adhering the wrapping sheet protruding from the front and rear side surfaces of the base material to the front and rear side surfaces of the base material; A manufacturing apparatus for a wrapping substrate comprising: 4. The wrapping substrate manufacturing device of claim 3, wherein the means (4) is a means for cutting so that the rear cut portion of the wrapping sheet of the current substrate and the front cut portion of the wrapping sheet of the next substrate are integrated. Effect of the Invention

[0007] According to the manufacturing method and manufacturing apparatus for wrapping substrate of the present invention, the cut pieces can be cut out in a large size as a single unit, thereby preventing the cut pieces from getting mixed into the product and reducing product defects caused by the cut pieces. [Brief description of the drawings]

[0008] [Figure 1]The outline of the method for manufacturing the wrapping substrate of the present invention is shown. The case where the cut portions of the current substrate and the next substrate are cut together is shown (similar to Figs. 2, 4, 6, and 7). [Diagram 2] FIG. 2 is a diagram for easily viewing the wrapping sheet being wrapped around the substrate. [Diagram 3] An enlarged view of the fruit portion of the substrate when the fruit is inserted is shown. [Figure 4] The shapes of the wrapping sheet and the cut-out parts are shown when the left and right sides are flat and the front and back sides are solid. [Diagram 5] The shapes of the wrapping sheet and the cut-out parts are shown when the left, right, front, and back sides are flat. [Figure 6] Figure 5 shows the shape of the wrapping sheet and the cut-out parts when the cut-out parts of the current substrate and the next substrate are integrated. [Figure 7] The wrapping sheet and the shape of the cut part are shown when the sheet is cut and cut in a special shape to cover the ridge of the base material. The mountain folds around the cut part are shown with dotted lines. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

[0010] 1. Overview of wrapping substrate manufacturing method In the present invention, a wrapping sheet 1 is wrapped around a rectangular substrate 2 (Fig. 1) that is continuously fed. The wrapping sheet is adhered to the top surface of the substrate by two rolls 12, the sheet is cut and unnecessary parts are removed by a laser 13, and the sheet is folded and pressed onto the sides by rollers 14, so that the sheet is adhered to a total of five surfaces: the top surface, left and right side surfaces (left side surface is 3), and front and rear side surfaces (rear side surface is 4).

[0011] 2. Base material The substrate 2 (FIG. 1) to be wrapped is usually a rectangular plate. It is made of wood, metal, or plastic, or a composite of these, and is more preferably made of wood. Examples of wood include plywood, PB, and MDF. The substrate flows continuously and has its top surface, left and right side surfaces, front and rear side surfaces wrapped, with the front, rear, left and right sides of the substrate being based on the direction of travel of the substrate from just before to just after the wrapping sheet is cut. There is no particular restriction on the shape of the front, back, left and right sides of the base material (for example, the left side 3 and the rear side 4), and for example, they may be flat or may be textured. When used as a flooring material, the front, back, left and right sides, or both, are often textured.

[0012] 3. Wrapping sheet and applying adhesive to wrapping sheet The wrapping sheet 1 (FIG. 1) can be made of resin, paper, etc. Resin sheets include, for example, olefin-based sheets, polyvinyl chloride sheets, polyester films, etc., and paper sheets include, for example, coated paper. Usually, wood grain or other patterns are printed on the wrapping sheet depending on the purpose. Thin materials such as films are also included in the wrapping sheet. The wrapping sheet used should be wider than the width of the base material by the amount needed to wrap the left and right sides. It is not necessary to wrap the entire left and right sides. For example, if the left and right sides are already finished with a material, it is acceptable to wrap only the part that is visible from above after the material is fitted (the R part in Figure 3). The wrapping sheet is usually wound in a roll, one end of which is continuously fed to the apparatus of the present invention, and first, adhesive is applied to the back surface by adhesive application means 11. The adhesive application means 11 may be a conventional coating means, such as a roll coater or blade coater. The adhesive may be any adhesive that has been used for wrapping substrates in the past. The wrapping sheet coated with the adhesive is fed to a continuous bonding means for the substrate.

[0013] 4. Supply to bonding means The substrate 2 (FIG. 1) is fed to the laminating means 12 with the wrapping sheet at an interval longer than the sum of the length of the rear side of the current substrate and the length of the front side of the next substrate to be wrapped. By leaving an interval longer than the sum, an excess portion of the sheet is generated between the two substrates. The "current" of the current substrate and the "next" of the next substrate indicate the wrapping order when wrapping continuously. The wrapping of the front and rear side surfaces may involve wrapping the entire side surface or only a portion of the side surface, and for example, when the front and rear side surfaces are processed to be solid, it may involve wrapping only the portion that is visible from above when the fruit is fitted (the R portion in FIG. 3). In other words, the length of the wrapping may be a length that can wrap the entire front and rear side surfaces, or a length that can wrap only a portion of the side surface. The interval at which the substrates are fed to the laminating means is adjusted by adjusting the speed of the transport rollers to the laminating means or by adjusting the interval at which the substrates are placed on the transport rollers.

[0014] 5. Bonding method The wrapping sheet is laminated onto the top surface of the substrate by lamination means 12 (Fig. 1). The lamination means may be any conventional means, such as a two-roll lamination, a four-roll lamination consisting of two rolls combined in series, a lamination means using a roller that feeds the substrate and one roll, or a lamination means that presses the wrapping sheet and substrate together from above. The roll may be a room temperature roll or a hot roll depending on the properties of the adhesive, etc. Pressing may be performed at room temperature or under heated conditions. The roll also often serves as the main transport means for the wrapping sheet and substrate.

[0015] 6. Cutting the sheet and removing unnecessary parts The wrapping sheet stretched out in a strip shape is cut with a laser 13 (Fig. 1), while cutting away the overlapping portions so that the wrapping sheet does not overlap at the four corners of the base material when the sheet is folded to the side. The overlapping parts, both front and back, are cut out by integrating the left and right cut pieces. The left and right cut pieces are connected and integrated by the excess part that is cut between the base materials (cut part 5 in Figure 4. Note that in 5, the cut part after the current base material is further integrated with the cut part before the next base material). This excess portion is generated by "supplying the substrate 2 (Figure 1) to the bonding means 12 with the wrapping sheet at an interval longer than the sum of the length of the rear side of the current substrate and the length of the front side of the next substrate to be wrapped" (first sentence of

[0013] ). If the front and back sides are solid, it is preferable that the parts of the sheet corresponding to the ends of the left and right sides be shaped to match the shape of the flesh (Figure 4. See the four corners of the sheet). The shape of the cut-out part, where the left and right cut pieces and the waste parts between the base materials are integrated, is a capital letter I with top and bottom crosses cut in half vertically, when the left, right, front and back sides are flat (Figure 5. If the cut-out parts are further integrated behind the current base material and in front of the next base material, it becomes Figure 6). It may also be cut out in a special shape to cover the ridge of the base material (Figure 7. In Figure 7, the cut-out part behind the current base material is further integrated with the cut-out part in front of the next base material). In either case, the left and right cut-out pieces are cut out as a single unit, with the excess part between the base materials in between.

[0016] Since the present invention wraps substrates continuously, the next substrate flows from behind the current substrate, so the cut-off portion at the back of the wrapping sheet of the current substrate and the cut-off portion at the front of the wrapping sheet of the next substrate can be cut so as to be integrated, which is more preferable (Figures 1, 2, 4, 6, 7).

[0017] These cuts and ablations are performed with a laser cutter, with the wrapping sheet being moved at an almost constant speed without pausing, and the laser light being synchronized with the movement.

[0018] By doing the above, some waste will occur in the wrapping sheet, but since the left and right cut pieces are integrated and made larger, there is no risk of them being mixed in with the product, and product defects due to cut pieces can be reduced. If the cut parts of the current base material and the next base material are integrated, the cut pieces will be even larger and the number of cut pieces will be reduced, which is more preferable.

[0019] 7. Fold and glue the wrapping sheet onto the left and right sides of the base material The folding and gluing to the left and right side surfaces of the base material can be performed by gradually changing the inclination of multiple rollers 16 (Fig. 1) while conveying the base material, and folding and gluing the protruding parts of the wrapping sheet to the left and right side surfaces. Note that the folding means can be any commonly used means and is not limited to rollers. 8. Fold and glue the wrapping sheet to the front, back and sides of the base material To fold the front and back sides of the base material, first change the direction of transport of the base material by 90 degrees, then use rollers or similar tools to fold the material towards the front and back sides and glue them together (Figure 1). [Industrial Applicability]

[0020] The present invention reduces product defects in wrapping substrates and improves production efficiency, and is therefore useful in industrial fields that manufacture building materials and furniture materials. [Explanation of symbols]

[0021] 1 wrapping sheet 2 Base material 3 Left side of the substrate 4 Back side of the substrate 5 Resection part 11 Adhesive application means 12 Bonding method 13. Laser 14 Coro

Claims

1. A method for continuously wrapping an upper surface, left and right side surfaces (left and right side surfaces), and front and rear side surfaces (front and rear side surfaces) of a rectangular substrate with a wrapping sheet, comprising: (1) continuously applying adhesive to a wrapping sheet having a width wider than the width of the substrate by an amount corresponding to wrapping the left and right sides; (2) supplying the substrate to a bonding means with a wrapping sheet at an interval longer than the sum of the length of the substrate to be wrapped around the rear side of the current substrate and the length of the substrate to be wrapped around the front side of the next substrate; (3) a step of attaching the wrapping sheet; (4) While cutting the wrapping sheet, a step of cutting off in advance overlapping portions of the wrapping sheet that are generated at the four corners of the base material when the wrapping sheet is folded to the side, and cutting off the cut pieces generated on the left and right sides so as to be integrated via the excess portions between the base materials; (5) a step of folding and adhering the wrapping sheet protruding from the left and right side surfaces of the base material to the left and right side surfaces of the base material; (6) a step of folding and adhering the wrapping sheet protruding from the front and rear side surfaces of the base material to the front and rear side surfaces of the base material; A method for producing a lapping substrate comprising the steps of:

2. 2. The method for producing a wrapping substrate according to claim 1, wherein in step (4), the rear cut-off portion of the wrapping sheet of the current substrate and the front cut-off portion of the wrapping sheet of the next substrate are cut so as to be integrated together.

3. An apparatus for continuously wrapping the top surface, front and rear side surfaces (front and rear side surfaces), and left and right side surfaces (left and right side surfaces) of a rectangular substrate with a wrapping sheet, (1) A means for continuously applying adhesive to a wrapping sheet having a width wider than the width of the base material by an amount corresponding to wrapping the left and right sides; (2) a means for supplying the substrate to a bonding means with a wrapping sheet at an interval longer than the sum of the length of the substrate to be wrapped around the rear side of the current substrate and the length of the substrate to be wrapped around the front side of the next substrate; (3) a means for attaching the wrapping sheet; (4) While cutting the wrapping sheet, a means for cutting off in advance overlapping portions of the wrapping sheet that are generated at the four corners of the base material when the wrapping sheet is folded to the side, and cutting off the cut pieces generated on the left and right sides so that they are integrated via the excess portions between the base materials; (5) A means for folding and adhering the wrapping sheet protruding from the left and right side surfaces of the base material to the left and right side surfaces of the base material; (6) A means for folding and adhering the wrapping sheet protruding from the front and rear side surfaces of the base material to the front and rear side surfaces of the base material; A manufacturing apparatus for a wrapping substrate comprising:

4. 4. The wrapping substrate manufacturing apparatus according to claim 3, wherein the means (4) is a means for cutting the rear cut portion of the wrapping sheet of the current substrate and the front cut portion of the wrapping sheet of the next substrate so as to be integrated with each other.

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