JP5560057B2 - End face processing method of wooden decorative board - Google Patents

Description

  The present invention relates to an improvement in a method for processing an end face of a wooden decorative board.

  In order to produce a wooden decorative board used for a door, a top plate of a kitchen cabinet or the like at a low cost, a particle board is generally used as a wooden base material (core material). Moreover, in order to shape | mold this wooden base material as a wooden decorative board, the chamfering process process of the corner | angular part of a wooden base material is normally implemented before the sticking process of a decorative sheet (for example, refer patent document 1). .

JP 2009-234248 A

  By the way, the particle board used as the core material is obtained by hot-press molding a small piece of waste material. Therefore, the front and back surfaces and portions close to the front and back surfaces are high in density and strong, but the central portion is low in density and relatively fragile. Therefore, the end surface which is a cutting surface where the weak part appears outside is rough and uneven. Therefore, even if the decorative sheet is directly attached to the end surface, the rough feeling of the end surface appears through the decorative sheet, and the smoothness and aesthetics as the front and back surfaces cannot be obtained. Further, since the end face may be rough, when the corner is chamfered (rounded), the internal structure may collapse from the rounded portion to the central portion, and proper chamfering may not be performed.

  3A and 3B are schematic longitudinal sectional views showing two examples of chamfering processing of a wooden decorative board using a particle board as a core material (woody base material).

  FIG. 3A shows a state in which the corner portion Y on the surface Z side of the wooden substrate 101 is rounded by the trimming apparatus T using the R blade. As described above, since the R-blade is used to process the rough and uneven end surface X of the wooden substrate 101 from the surface Z to the surface Z, the corner Y has a rough feeling like the end surface X as shown in the enlarged view of the corner Y. Depending on the curvature of the radius and the shape of the R blade, the corner Y may be collapsed. Moreover, since the center part except the front and back surfaces of the wooden base material 101 and its vicinity is very fragile, the center part of the end face is more rough.

  FIG. 3B shows an example in which the front and back surfaces and the end surface X of the wood substrate 101 made of particle board are covered with a MDF (medium density fiberboard) protruding plate 102, and a decorative sheet 103 is further attached to produce a product. It is. According to this method for forming the wooden decorative board 100, since the protruding plate 102 is attached to the end surface X of the wooden substrate 101, the end surface X can be reinforced and smoothed. Further, a part of the MDF protruding plate 102 is cut into a comb-like shape, and the comb-teeth portion 102a is attached to the corner portion Y so that the meat is absorbed into the gaps between the comb teeth. The corner Y is rounded. Therefore, it is excellent in that it can be rounded without using the trimming apparatus T.

  However, in this method, MDF, which is more expensive than a particle board or plywood, must be used, and thus the manufacturing cost is high.

  In addition, since the technique described in Patent Document 1 is chamfered with respect to a resin plate attached to the front and back surfaces of a particle board, the above-described chamfering error does not occur. Cost is expected.

  The present invention has been proposed in view of such circumstances, and the object thereof is to reduce the cost, to make a chamfering process without mistakes, and to form a beautiful corner portion. Is to provide. Further, it is also included in the main object of the present invention to form the end face of the wooden decorative board smoothly and firmly like the front and back surfaces.

In order to achieve the above object, the method for processing an end face of a wooden decorative board according to claim 1 is characterized in that a reinforcing sheet is bonded to the end face of the wooden base material and the front and back surfaces connected to the end face via a corner. corners chamfered in a state of bonding the sheet, characterized in that adhering the decorative sheet so as to cover the beauty table backside Oyo end face.

  According to this method, since the chamfering process is not performed directly on the wooden base material but the reinforcing sheet is attached, the chamfering process can be surely cleaned. In addition, the wood base has a low density and is brittle inside, but the weakened part is exposed and the center part of the end face is surely covered with the reinforcing sheet, so the end face can be strengthened and smooth without any unevenness through the decorative sheet Smooth surface can be formed.

Moreover, according to this method, since the reinforcing sheet is stuck also on the front and back surfaces, a uniform and smooth surface can be formed from the end surface to the front and back surfaces via the corners. Moreover, since a corner | angular part can be protected with a reinforcement sheet | seat, it can prevent that a round shape collapse | crumbles in the case of a chamfering process.

In the method for processing an end face of a wooden decorative board according to claim 2 , the reinforcing sheet is made of paper impregnated with resin.

  According to the wood decorative board formed by this method, the hardness of the end face can be increased by the characteristics of the resin-impregnated paper. Further, the air permeability can be improved by adjusting the amount of impregnation of the resin, and the air that has entered when the decorative sheet is stuck can be absorbed by the reinforcing sheet and the wooden base material therethrough.

In the method for processing an end face of a wooden decorative board according to claim 3 , the reinforcing sheet is made of a synthetic resin sheet having fine irregularities formed on the front and back surfaces.

  According to this method, the air that has entered when the decorative sheet is stuck can be discharged to the outside through the fine unevenness. Further, since the adhesive enters the fine irregularities on the back surface of the reinforcing sheet when the reinforcing sheet is bonded, an anchor effect can be expected.

  Since the end face processing method of the wooden decorative board of the present invention is configured as described above, it is low-cost, can be chamfered without error, and can form a beautiful corner, and the end face is smoothed similarly to the front and back surfaces. It can be formed firmly.

It is the process flowchart (upstream process) which showed an example of the end surface processing method of the wooden decorative board of this invention. It is the same process flowchart (downstream process). (A) (b) is a schematic longitudinal cross-sectional view which shows two examples of the chamfering process of the conventional wooden decorative board.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 are process flow charts showing an example of a method for processing an end face of a wooden decorative board according to the present invention. 1 and 2 show the entire process by combining them. In these drawings, A in the figure is an adhesive application (state after application), B is a sticking of a reinforcing sheet, C is a chamfering process, D is an end cut, and E is a small process of sticking a decorative sheet. Each small process is shown in a longitudinal sectional view of the end face portion of the board. Further, what is shown above the longitudinal sectional view is a plan view corresponding to the small process. The symbols X, Y, Z1, and Z2 for the end face, corner, front surface, and back surface shown in the figure are used as common symbols for intermediate products and products in each small process.

  In addition, although it is desirable to implement a series of processes from the adhesive application process A shown in FIG. 1 to the end cut process D shown in FIG. 2 using an edge bander (edge pasting machine), Is not limited.

  A wooden decorative board 10 (see step E in FIG. 2) molded by the method shown in this example is a particle board made of a wooden base material 1 as a core material. Is attached with a backing sheet 6 in advance. This backing sheet 6 is made of a polyester-based resin film or the like, has no pattern, and is affixed to the back surface of the backing sheet 6 that is not exposed as a product. Sheets 5 are not laminated.

  The wood substrate 1 thus backed is first applied with an adhesive for adhering the reinforcing sheet 3 to the end surface X, which is the cutting surface, in the adhesive application step A. As the adhesive, a hot melt adhesive can be suitably used, and it is applied using a glue roll (not shown) provided in the edge bander.

  Next, the reinforcing sheet 3 is attached to the end surface X on which the adhesive layer 2 is formed (see step B). As a sticking method, as shown in a corresponding plan view, it is desirable to stick using a roller 21 from one side of the end face X to the other side. In addition, as shown in the longitudinal sectional view, it is desirable that the reinforcing sheet 3 is pasted so as to protrude above and below the upper and lower corners Y.

  As the reinforcing sheet 3, a resin-impregnated paper or a synthetic resin sheet having fine irregularities formed on the front and back surfaces can be used. Details of each sheet will be described later.

  Then, both corners Y and Y are chamfered by the trimming device 22, whereby the reinforcing sheet 3 protruding above and below the end surface X is scraped off (see step C). In the example shown in the figure, rounding is performed using the R blade 22a. However, once the C beveling is performed, the rounding may be performed instead of the R blade, or only the C beveling may be performed.

  Next, the part which protruded from the side part of the end surface X is cut off with the end cut apparatus (not shown) provided in the edge bander (refer process D).

  A decorative sheet 5 made of a synthetic resin having a pattern such as a grain is attached to the wooden base material 1 with the reinforcing sheet 3 attached to the end face X in this manner using a lapping device (not shown). The decorative sheet 5 is attached so as to cover the front surface Z1, the end surface X, and the back surface Z2 end of the board (see step E). A solvent-type adhesive, a PUR adhesive, or the like can be suitably used for attaching the decorative sheet 5. In addition, the code | symbol 4 in the process E of FIG.

  Thus, according to the end surface processing method shown in FIGS. 1 and 2, the method of chamfering after attaching the reinforcing sheet 3 without directly chamfering the wood base material 1 is adopted. Therefore, it is possible to clean the chamfer without breaking the structure of the wooden substrate 1 by the chamfering process. Further, since the end face X is covered with the reinforcing sheet 3, the central portion of the end face X that appears inside as an unevenness inside the low-density wood base material 1 can be strengthened, and the smooth surface without any unevenness can be obtained through the decorative sheet 5. Can be formed.

  In FIGS. 1 and 2, for the sake of illustration, the thickness of the reinforcing sheet 3 is shown to be thicker than that actually used, but in practice, a thickness of about 0.3 to 0.5 mm is preferable. Can be used. According to the reinforcing sheet 3 having such a thickness, the reinforcing sheet 3 at the corner Y may be scraped off in the chamfering process to expose the wooden substrate 1. Since it acts as a clasp, there is no possibility that the material of the wooden substrate 1 will collapse. Therefore, a strong corner Y can be formed. Further, the portion where the reinforcing sheet 3 is scraped off by the chamfering process is a portion that is very close to the surface of the corner portion Y, and since this portion has a high strength in the first place, there is no possibility of collapsing even if the portion is exposed.

  Further, the reinforcing sheet 3 may be attached to the front surface Z1 and the rear surface Z2 that are continuous with the end surface X, so that a uniform and smooth surface can be formed from the end surface X to the front and back surfaces via the corner portion Y. Moreover, since the corner | angular part X can be reliably protected with the reinforcement | strengthening sheet 3, it can prevent reliably that the wooden base material 1 collapse | crumbles at the time of a chamfering process.

  Next, the resin-impregnated paper and the synthetic resin sheet used as the reinforcing sheet 3 will be described in detail.

  As the resin-impregnated paper, for example, DAP (diallyl phthalate) resin-impregnated paper which is a known material can be suitably used. The DAP resin-impregnated paper is a material used for the surface material and the like of a known DAP decorative board, and has a feature that it has high surface hardness, excellent wear resistance and heat resistance.

  Therefore, since the reinforcing sheet 3 has such characteristics, if it is used by being attached to the end surface X of the wooden substrate 1, it can cover and smooth the rough feeling due to the irregularities of the cutting surface of the particle board, and The hardness of the end face X after the product can be increased.

  In addition, since it is made of paper, the air permeability is good in the first place, and the air permeability can be optimized by adjusting the amount of resin impregnation. Furthermore, the air that has entered during the application of the decorative sheet 5 can be absorbed by the reinforcing sheet 3 and the wooden substrate 1 through the reinforcing sheet 3. Moreover, since it is paper, its adhesiveness is also good.

  For example, gas (air, etc.) that has entered during the wrapping of the decorative sheet 5 or gas (methylene chloride) released from a solvent-type adhesive may be released into the reinforcing sheet 3 or the wood substrate 1. It is possible to improve air permeability.

  On the other hand, as the synthetic resin sheet, for example, a synthetic resin sheet having fine irregularities on the front and back surfaces by embossing, primer treatment or the like can be suitably used.

  In this way, if the reinforcing sheet 3 on which fine unevenness is formed is used, gas can be released through the fine unevenness when the decorative sheet 5 is wrapped. Moreover, even after commercialization, the distribution of gas or the like can be improved by the fine unevenness, and the moisture contained in the wooden substrate 1 can be discharged to the outside through the fine unevenness. Moreover, since the adhesive enters the fine irregularities on the back surface Z2 of the reinforcing sheet 3 when the reinforcing sheet 3 is bonded, the adhesive force is also increased (anchor effect).

  As described above, it is necessary to give sufficient consideration to air permeability when sticking the reinforcing sheet 3, but not only devising only the reinforcing sheet 3, but also using a PUR adhesive for sticking the decorative sheet 5. It is desirable to suppress gas generation.

DESCRIPTION OF SYMBOLS 10 Wood decorative board X End surface Y Corner part Z1 Front surface Z2 Back surface 1 Wood base material 2 (For reinforcement sheet) Adhesive layer 3 Reinforcement sheet 4 (For decorative sheet) Adhesion layer 5 Cosmetic sheet 6 Backing sheet 21 Roller 22 Trimming device 22a R blade

Claims (3)

And the end surface of the wood substrate, and bonding the reinforcement sheet to the front and back surfaces continuing through the corner to the end face, and chamfered corners while bonding the reinforcing sheet, said end face and to cover the front and back faces A method for processing an end face of a wooden decorative board, wherein a decorative sheet is attached to the substrate. In claim 1,
The reinforcing sheet is a method for processing an end face of a wooden decorative board made of paper impregnated with resin . Oite to claim 1,
The reinforcing sheet is a method for processing an end face of a wooden decorative board comprising a synthetic resin sheet having fine irregularities formed on the surface thereof .

Images