Name marking method for wooden products

Abstract

To provide a method for marking names on wooden products and a marking structure, which make it possible to obtain clear and beautiful characters with excellent fixation of coloring material, without blurring or bleeding, even in portions such as strokes or hooks of the characters where grooves or recesses become shallow and narrow on the surface of wooden products such as furniture.SOLUTION: Technical means is adopted in which a groove portion 12 having a predetermined width in the form of a character stroke is formed on the surface of a wooden base material 1 having a protective coating film 11 by irradiation with a laser beam L; a first underlayer 21 in which a primer 20 composed of a vinyl resin is impregnated and cured is formed on an inner surface of the groove portion 12; a second underlayer 22 formed by further curing the primer 20 is formed on a surface of the first underlayer 21; and a coloring material 4 is deposited on a surface of the second underlayer 22.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to an improvement in wood product processing technology, and more specifically to a method and structure for marking wood products, which can achieve clear, beautifully finished characters with good adhesion and no bleeding of coloring agents, even in the bump parts of letters where the grooves are shallow and thin, when marking the surfaces of wooden products such as furniture. [Background technology]

[0002] In recent years, a process has been developed in which a portion of the surface of wooden products such as furniture is carved out by engraving or other methods, and then a name is inscribed directly on the product. This can add a high level of added value to the product or service, as it creates a sense of ownership and improves the design, particularly in gifts and beloved items.

[0003] Conventionally, in such marking processes, a method has been disclosed in which a laser beam is irradiated onto the surface of a pre-made wooden substrate, causing the wood components of the wooden substrate to evaporate or carbonize, thereby forming the desired letters, figures, etc. (see, for example, Patent Document 1).

[0004] However, unlike shapes and patterns, characters such as names usually have the characteristic that the "handwriting" is formed in the form of lines of approximately uniform width, so in order for the characters to appear on the surface of the wooden base material, it is necessary to form thin grooves.

[0005] When coloring such narrow grooves, if you try to apply the coloring agent to the inner surface of the groove, the viscosity and surface tension of the coloring agent can prevent the coloring agent from entering the groove properly, or air bubbles can become trapped at the bottom of the groove and become difficult to remove.

[0006] Furthermore, since wood is porous, the surface of the wooden substrate is easily impregnated with liquid, which can lead to the problem that coloring agents or the like can unintentionally penetrate the sides of the grooves and bleed out.

[0007] In particular, in the "jump" and "sweep" parts, which are geometric elements specific to characters, the grooves taper, resulting in shallow and narrow parts at the ends, which can cause the coloring agent to easily spill out or bleed during the coloring process. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-230470 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made in consideration of the above-mentioned problems with conventional wood product processing techniques, and its purpose is to provide a method and structure for marking wooden products, which, when marking the surface of wooden products such as furniture, has good adhesion without bleeding of coloring matter even in the protruding parts of the letters where the grooves are shallow and thin, and can produce clear, beautifully finished letters. [Means for solving the problem]

[0010] The means adopted by the present inventor to solve the above technical problems will be described below with reference to the accompanying drawings.

[0011] That is, in the present invention, a masking tape 5 is applied to the surface of a wooden substrate 1 having a protective coating 11, and the gap between the wooden substrate 1 and the masking tape 5 is deaerated to bring them into close contact with each other, A laser beam L is irradiated onto the surface of the masking tape 5 to form grooves 12 in the shape of handwriting of a predetermined width. A primer 20 made of vinyl resin is applied to the inner space of the groove 12. Use a generous amount and apply it to the surface of the masking tape 5 or more. Filled Wooden substrate 1 The primer 20 is impregnated and dried and cured to form a first base layer 21. A primer 20 is further applied to the surface of the first base layer 21, and the primer 20 is dried and cured to form a second base layer 22. A coloring agent 4 is applied to the surface of the second base layer 22 and dried. A coating agent 30 made of a vinyl resin is applied to the surface of the coloring agent 4, and the coating agent 30 is dried and hardened to form a top coat layer 3, and then Peel off the masking tape 5, The top coat layer 3 is hardened and formed on the edge of the slot 12. At least the first underlayer 21 By adopting the technical means of removing burrs 31, a method of marking wooden products has been perfected. [Effects of the Invention]

[0014] In the present invention, a masking tape is applied to the surface of a wooden substrate having a protective coating, and the wooden substrate and masking tape are degassed to adhere to each other. A laser beam is then irradiated onto the surface of the masking tape to form handwriting-like slots of a predetermined width. The internal spaces of the slots are filled with a vinyl resin primer, which is then dried and cured to form a first base layer. A further primer is applied to the surface of the first base layer, which is then dried and cured to form a second base layer. A colorant is then applied to the surface of the second base layer and dried. A vinyl resin coating is applied to the surface of the colorant, which is then dried and cured to form a top coat layer. The masking tape is then peeled off, and burrs formed on the edges of the slots due to the hardening of the top coat layer are removed. This ensures that the colorant does not bleed and adheres well, even in the shallow, narrow slots where the letters overlap, resulting in clear, beautifully finished characters. This method has great industrial value. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 2]1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 3] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 4] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 5] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 6] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 7] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 8] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 9] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 10] 1 is an explanatory cross-sectional view showing a name marking method according to an embodiment of the present invention. [Figure 11] 1 is a photograph showing the appearance of a name marking structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] An embodiment of the present invention will be described with reference to Figures 1 to 11. First, a method for marking a wooden product according to the present invention will be described.

[0017] First, masking tape 5 is applied to the surface of wooden substrate 1 having protective coating 11, and the gap between wooden substrate 1 and masking tape 5 is evacuated to allow them to adhere tightly (see FIGS. 1 and 2). The wooden substrate 1 may be made of mahogany, walnut, teak, ash, alder, rubberwood, cedar, pine, cypress, zelkova, beech, oak, maple, boxwood, ebony, rosewood, or the like, and may be in any form such as solid wood, laminated wood, or plywood.

[0018] The protective coating 11 may be made of a urethane resin paint (water-based or oil-based urethane varnish), a lacquer paint (nitrocellulose as the main component with alkyd resin, acrylic resin, plasticizer, etc. added), or a natural oil paint whose main components are linolenic acid, linoleic acid, oleic acid, etc.

[0019] Furthermore, the masking tape 5 may be made of paper or resin film that is difficult to impregnate with a liquid agent, with an acrylic adhesive or rubber adhesive applied to the surface thereof.

[0020] A specific method for reliably degassing and adhering the wooden substrate 1 and masking tape 5 is, for example, to rub a protruding object (such as the tip of a ballpoint pen) against the masking tape 5, thereby adhering the wooden substrate 1 and masking tape 5 without damaging them. By adhering them in this way, it is possible to reliably prevent the primer 20, coating agent 30, and colorant 4, which will be described later, from seeping in between them.

[0021] Next, a laser beam L is irradiated onto the surface of the masking tape 5 to form handwritten slots 12 of a predetermined width (see FIG. 3). The position, time, and output intensity of the laser beam L can be preprogrammed into the irradiation device, and the light source is moved and flashed as appropriate. During this process, the masking tape 5 and wooden substrate 1 irradiated by the laser beam L are instantaneously vaporized by the high energy, so it is preferable to control the laser beam L to prevent overheating and minimize carbonization of the wooden substrate 1. Furthermore, the slots 12 preferably have a width of 2 mm or less and a depth of 2 mm or less.

[0022] As shown in Fig. 4, the interior space of the grooves 12 is filled with a primer 20 made of a vinyl resin, which is then dried and cured to form a first base layer 21 (see Fig. 5). The primer 20 can be a lacquer-based paint made of a vinyl resin, nitrocellulose, and an organic solvent. By using a larger amount of primer 20 in this way, the wood substrate 1 can be reliably impregnated with the primer (see the arrow in Fig. 5), resulting in a strong first base layer 21.

[0023] Next, a primer 20 is further applied to the surface of the first base layer 21, and the primer 20 is dried and cured to form a second base layer 22 (see FIG. 6). The same lacquer-based paint as above can be used for the initial primer 20, and it can be applied by spraying. The drying process can be natural drying or hot air drying.

[0024] Then, a coloring agent 4 is applied to the surface of this second base layer 22 and dried (see FIG. 7). As the coloring agent 4, an acrylic paint kneaded with a pigment can be used, and colors such as black, gray, and gold can be used. Furthermore, a coating agent 30 made of a vinyl resin is applied to the surface of this coloring agent 4, and the coating agent 30 is dried and hardened to form a top coat layer 3 (see FIG. 8).

[0025] Thereafter, the masking tape 5 is peeled off as shown in Figure 9. As a result, the top coat layer 3 hardens, and burrs 31 are inevitably formed at the edges of the slots 12 (see Figure 10). The burrs 31 are then removed by wiping or cutting to smooth the surface, completing the processing step (see Figure 11).

[0026] According to the above-described name marking method, a groove 12 in the shape of a handwritten character having a predetermined width is formed on the surface of a wooden base material 1 having a protective coating 11 by irradiation with a laser beam L, and a first base layer 21 is formed on the inner surface of this groove 12, which is impregnated with a primer 20 made of a vinyl resin and hardened, and a second base layer 22 in which the primer 20 is hardened is further formed on the surface of this first base layer 21, and a coloring agent 4 is attached to the surface of this second base layer 22, thereby reliably forming a name marking structure in a wooden product.

[0027] In this embodiment, at least one of the slots 12 may be tapered at one end, becoming shallower and thinner toward the end, forming a handwritten character. Hiragana, katakana, Roman letters, kanji, and the like have character-specific geometric elements such as "bounces" and "sweeps," and the depth of slots 12 of this shape can be easily formed by adjusting the amount and duration of irradiation of the laser beam L. Furthermore, to apply the colorant 4 to this portion, it is preferable to use a writing brush or paintbrush with a small tip. By ensuring that the colorant 4 reaches the end, the colorant adheres well without bleeding, resulting in a clear, beautifully finished character.

[0028] The present invention is generally configured as described above, but the present invention is by no means limited to the illustrated embodiments, and various modifications are possible within the scope of the claims. For example, the base layer is not limited to the first base layer 21 and the second base layer 22, but can also be further coated on top of the second base layer 22, and this falls within the technical scope of the present invention. [Explanation of symbols]

[0029] 1 Wooden base material 11 Protective coating 12 Groove 20 Primers 21 First base layer 22 Second base layer 30 Coating Agent 3 Topcoat layer 31 Bali 4 Coloring agent 5. Masking tape L laser beam

Claims

[Claim 1] A masking tape is applied to the surface of the wooden substrate having the protective coating, and the gap between the wooden substrate and the masking tape is degassed to allow them to adhere tightly to each other. A laser beam is irradiated onto the surface of the masking tape to form grooves in the shape of handwriting of a predetermined width; A large amount of a primer made of a vinyl resin is used in the internal space of the groove portion, and the primer is filled up to the surface of the masking tape or more to impregnate the wooden substrate, and the primer is dried and hardened to form a first base layer. A primer is further applied to the surface of the first base layer, and the primer is dried and cured to form a second base layer, and then A coloring agent is applied to the surface of the second base layer and dried. A coating agent made of a vinyl resin is applied to the surface of the coloring agent, and the coating agent is dried and hardened to form a top coat layer, and then Peel off the masking tape, A method for marking a wooden product, characterized in that a burr including at least the first base layer formed on the edge of the slot portion due to hardening of the top coat layer is removed.

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