JP2012101470A - Method for processing surface of bamboo material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for processing the surface of a bamboo material, in which a radial burning pattern is simply and inexpensively created on the surface of a green bamboo material or a bamboo material as a construction material, or the like.SOLUTION: The method for processing the surface of a bamboo material is provided for creating a burning pattern on the surface skins 18, 18' of bamboo materials 10, 32. The method includes a burning step in which radial burning patterns 2, 3, 4, 6, 7, 8 are created with the outer flame 14 of a flame 20 in such a manner that the flame 20 from the flame nozzle 12 is applied to the surface just for a short period of time while a cylindrical flame nozzle 12 of a burner is brought close to the surface.

Description

The present invention relates to a method for processing the surface of a bamboo material, and more particularly to a method for processing a bamboo material surface for forming a baking pattern on the surface of the bamboo material.

Conventionally, bamboo has been widely distributed in Japan, such as crafts such as cylindrical containers using bamboo cylinders, musical instruments such as shakuhachi, building materials (or building materials) divided into long bamboo cylinders and divided vertically. As a bamboo product, its use is also diverse.

Such bamboo products are used not only as a practical product but also as an ornamental product, and various surface treatments have been applied to the surface thereof. Until now, as this surface treatment, for example, a traditional treatment method in which the entire surface is treated, for example, by changing the color to blackish bamboo with heating smoke or changing the entire surface to brown or amber by burning Was the mainstream.

On the other hand, in recent years, various proposals have been made regarding a technique for applying a pattern to the surface of bamboo material, for example, for the purpose of imparting excellent aesthetics and unique aesthetics to bamboo products (for example, Patent Document 1). Patent Document 2).

Japanese Utility Model Publication No. 62-13699 JP 2005-343155 A

According to Patent Document 1, an invention of a bamboo product baked product obtained by applying a glaze to a bamboo product and firing it is disclosed.
Further, according to Patent Document 2, a bamboo plate-like member is cut out along a predetermined pattern or character shape by a heating wire penetrating the plate-like member, and the cut-out pattern portion or character portion is cut out. A step of holding the cut-out portion at a position displaced in the plate thickness direction by an amount smaller than the plate thickness of the plate-like member with respect to the plate-like member; And a method of manufacturing a decorative board having a step of bonding to a member.

However, when producing the bamboo product baked goods of patent document 1, it is necessary to use a glaze, and there exists a problem that it may lead to a manufacturing cost increase by requiring a high temperature kiln, such as 1000 degreeC, for example. there were.

According to Patent Document 2, in order to form a predetermined pattern, a bamboo plate-like member is cut out along the shape of the predetermined pattern by a heating wire penetrating the plate-like member, and then the cut-out is performed. Since it is necessary to hold the pattern portion held in the portion displaced in the plate thickness direction by an amount smaller than the plate thickness of the plate-like member with respect to the plate-like member, and bond the held pattern portion to the plate-like member, for example When a predetermined pattern portion is cut out, a skilled skill is required, and it takes a lot of time to manufacture the decorative plate due to the time required for cutting out, and there is a risk that the manufacturing cost of the decorative plate will increase. There was a problem that there was.

Therefore, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a bamboo material surface processing method for forming a radial baking pattern on the surface of the bamboo material easily and inexpensively.

  The invention of claim 1 is a bamboo material surface processing method for forming a seizure pattern on the surface of the bamboo material on the skin side, and the flame erupted from the crater in a state where the cylindrical crater of the burner is brought close to the surface. It is a bamboo material surface processing method including a baking step of forming a radial baking pattern using the flame of the flame by spraying the surface for a short time.

According to a second aspect of the present invention, in the bamboo material surface processing method according to the first aspect, the baking step includes adjusting a heating power of the flame to form a plurality of the baking patterns in a substantially concentric shape.

A third aspect of the present invention is the bamboo material surface processing method according to the first or second aspect, wherein the bamboo material is made of green bamboo material, and the region excluding the region where the baking pattern is formed on the surface is roasted by the burner. And a step of draining the region and firing the region in ivory or amber.

The invention of claim 4 is the method of surface treatment of bamboo material according to claim 3, wherein the wax is applied to the surface, and the temperature of the bamboo material is solidified and flows after the firing step. A wax application step of applying a melted wax to the surface before the temperature is lost.

According to a fifth aspect of the present invention, in the bamboo material surface processing method according to the fourth aspect, the green bamboo material is formed of a cylinder, and ink is applied to an edge of the cylinder between the firing step and the wax application step. It includes a black ink application process.

The invention of claim 6 is the bamboo material surface processing method according to claim 1 or 2, wherein the bamboo material is a long plate body that has been subjected to oil draining treatment, and after the baking step, A wax treatment step of applying to the surface and heating the surface with the burner;

According to the present invention, there is provided a bamboo surface processing method for forming a baking pattern on a surface of a bamboo material on the skin side, and a flame erupted from the crater in a state where the cylindrical crater of the burner is brought close to the surface. Since it is a structure including a baking process that forms a radial seizure pattern using the flame outside the flame by spraying on the flame for a short time, the sprayed flame scatters radially along the surface. It is possible to provide a bamboo surface processing method that can easily form a radial baking pattern on the surface of bamboo material by using the outer flame portion of the flame.

Further, since the baking step includes a configuration including adjusting the flame power of the flame and forming a plurality of the baking patterns in a substantially concentric shape, for example, a first radial baking pattern is formed with a predetermined heating power, Next, by forming the second radial baking pattern inside the first radial baking pattern with the heating power lowered, the radial baking pattern can be formed concentrically on the surface of the bamboo material at a low cost by a simple process. Therefore, it is possible to provide a bamboo surface processing method that can enhance the aesthetics and design effect of bamboo products using this bamboo material.

Further, the bamboo material is made of green bamboo material, and the area excluding the area where the baking pattern is formed is roasted with the burner to drain the area, and the area is ivory or amber. Since it is a structure including a firing step for firing, even if it is a blue bamboo material, the surface of the skin side can be made into a traditional ivory color or amber-colored texture, and a radial baking pattern can be revealed in it. . Therefore, it is possible to provide a bamboo material surface processing method that can further enhance the aesthetics and design effect of bamboo products using this bamboo material at a low cost by a simple process.

Also, a step of applying wax to the surface, wherein the molten wax is applied to the surface after the firing step and before the temperature of the bamboo material drops to a temperature at which the molten wax solidifies and loses fluidity. Since the composition includes a wax coating process to be applied, the melted wax can easily penetrate into the fibers of the bamboo material, and the surface of the bamboo product using the bamboo material can be uniformly polished, and the wax can be removed from the firing process. The time until completion of the coating process can be shortened, and the processing process can be shortened and simplified.

In addition, since the green bamboo material is formed of a cylinder and includes a black ink application step of applying black ink to an edge of the cylinder between the baking step and the wax application step, the bamboo cylinder with a black edge A bamboo product using the body can be made, and the design effect of the cylindrical bamboo product is further enhanced.

In addition, the bamboo material is a long plate body that has been subjected to oil draining treatment, and after the baking step, a melted wax is applied to the surface, and the wax treatment step of heating the surface with the burner is heated. Because of the structure, it is possible to form a radial baking pattern on the surface of the bamboo skin at a low cost by a simple process, and to improve the moisture resistance and extend the life of bamboo products and structures using this bamboo material. .

It is a perspective view explaining the baking process in one Example of this invention. It is a side view explaining the baking process in one Example of this invention. It is a side view explaining the baking process in one Example of this invention. It is a front view explaining the baking process in one Example of this invention. It is a side view explaining the baking process in one Example of this invention. It is a perspective view explaining the example of the container using the bamboo material processed by one Example of this invention. It is a front view explaining the example of the building material processed by one Example of this invention.

Hereinafter, a bamboo surface processing method according to an embodiment of the present invention will be described.
Although the kind of bamboo used for the bamboo material of this embodiment is not specifically limited, For example, it is good to use the bamboo container suitable for the use as a cylindrical container mentioned above or a building material, Mosouchiku, and a bee. In addition, bamboo that is 3 to 5 years after the first buds sprout is preferable in terms of strength, color after processing, and the like.

The bamboo material may be a green bamboo material, or a known oil draining process may be applied to the green bamboo material. Here, the blue bamboo material is a bamboo material in which the outer peripheral surface side, that is, the skin side is tinged with blue, such as a bamboo cylinder just after being cut from raw bamboo. In addition, the shape of the bamboo material may be a cylinder obtained by rounding a bamboo cylinder, or may be a vertically divided bamboo cylinder divided.

In addition, the said oil draining process means the process which removes the fats and oils etc. which are mainly contained in the skin of green bamboo. This oil removal treatment may be performed by a wet treatment method in which, for example, green bamboo is immersed in hot water or an alkaline solution such as sodium hydroxide and boiled to elute and remove oil and fat. Alternatively, the green bamboo may be roasted with heat to wipe off the oil and fat that has oozed out on the surface, and removed by a dry processing method.

Next, the burner of this embodiment can use the commercially available gas burner which burns the premixed gas which combustion gas etc. mixed with air, for example. More specifically, the burner includes a gas cylinder filled with a combustion gas such as propane gas, and a torch that is connected to the gas cylinder and ejects a flame.

The torch according to the present embodiment includes a connecting portion that is connected to a gas cylinder in an airtight manner, a cylindrical crater 12 (see FIG. 1) that is a flame outlet, an air hole that guides air mixed with combustion gas into the torch, An air adjustment lever for adjusting the opening of the air hole, a discharge adjustment lever for adjusting the discharge amount of the combustion gas, an ignition button, and the like are provided.

As shown in FIG. 5, the flame 20 blown out from the crater 12 of the burner includes an inner flame 16 corresponding to the center portion of the flame and an outer flame 14 formed outside the inner flame 16. The outer flame 14 forms the outermost part of the flame 20, has a sufficient supply of oxygen and is as high as about 1000 ° C. to 1600 ° C., and is also called an oxidization flame because the oxidation reaction of the substance is easy to proceed. Further, it is known that the internal flame 16 has a low temperature of, for example, approximately 300 ° C. to 500 ° C., and thus the oxidation reaction does not proceed so much because of insufficient oxygen supply. In addition, the inner flame is called a reducing flame because it has a reducing action. In the following description, a line connecting the center of the crater 12 and the top of the flame is referred to as a flame central axis (see FIG. 5).

Hereinafter, the bamboo surface processing method according to the present embodiment will be described with reference to the drawings. The bamboo material surface processing method of the following examples was performed manually, a commercially available portable gas burner was used as the burner, and a cylindrical crater 12 having a diameter of approximately 2 cm was used.
[Example 1]
Hereinafter, Example 1 will be described with reference to FIGS.
FIG. 4 is a front view for explaining a state in which a plurality of radial printing patterns are formed substantially concentrically. FIG. 4A shows a state in which a single radial printing pattern is formed, and FIG. ) Shows a state in which a double radial baking pattern is formed, and FIG. 4C shows a state in which a triple radial baking pattern is formed.
In this embodiment, as shown in FIG. 1, the bamboo material 10 is made of a substantially cylindrical body having an outer diameter of about 7 cm, a thickness of about 6 mm, and a length of about 12 cm.

First, a radial baking pattern is formed on the skin side surface (hereinafter referred to as “surface”) 18 of the green bamboo material 10 by a baking process. Specifically, as shown in FIG. 1 and FIG. 2, a flame that is ejected from the crater 12 with a predetermined thermal power in a state in which the crater 12 and the surface 18 are brought close to each other while the crater 12 and the surface 18 of the burner are opposed to each other. 20 was sprayed onto the surface 18. At that time, as shown in FIG. 2, the distance L between the crater 12 and the surface 18 was adjusted to about 5 mm to 7 mm.

As a result, the flame 20 sprayed on the surface 18 is scattered along the substantially surface 18 as shown in FIGS. 1 and 2. More specifically, as shown in FIGS. 1 and 2, the flame radiates radially with the intersection M between the central axis A and the surface 18 described above as a substantial center. The oxidation reaction in the area exposed to the inner flame 16 hardly progresses, and the oxidation reaction in the area exposed to the outer flame 14 proceeds. Therefore, the epidermis in the area exposed to the external flame 14 burns, and the carbonization of the surface of the bamboo body inside the epidermis progresses, and as shown in FIG. Formed on surface 18. In addition, the time which sprayed the flame 20 was able to be formed in about 5 to 8 second for a short time.

At that time, since the flame 20 is scattered radially as described above, the seizure pattern 2 is also formed radially with the intersection M as the center. More specifically, since the oxidation does not proceed in the area exposed to the inner flame 16, a radial seizure pattern 2 is formed outside the circular area 22 exposed to the inner flame 16 as shown in FIG. Is done.
Then, the oil and fat that had oozed out on the surface was quickly wiped off with a cloth or the like.

Next, the flame power is adjusted by the discharge adjustment lever or the air adjustment lever, and as shown in FIGS. 3 and 4B, the second radial printing pattern is formed inside the radial baking pattern 2 formed in the baking process. 3 was formed in a concentric shape to form a double pattern 1.
Specifically, baking was performed by the same procedure as that in the baking step in a state where the thermal power of the flame was slightly lower than the predetermined thermal power. At that time, as shown in FIG. 3, the heating power of the flame 20 was adjusted so that the outer flame 14 was within the circular region 22 described above. Thus, the diameter of the radial seizure pattern can be changed by adjusting the heating power of the flame 20 and changing the diameter of the inner flame 16 or the outer flame 14.

In the present embodiment, the heating power is further adjusted, and as shown in FIG. 4 (c), the third radial printing pattern 4 is formed substantially concentrically inside the second radial baking pattern 3, and these radial printing patterns are formed. A triple pattern 5 formed in a concentric and triple manner was formed.
A plurality of triple patterns and double patterns were formed on the surface while separating such multiple patterns so as not to overlap each other (see FIG. 6).

In particular, in the case of a blue bamboo material, as shown in FIG. 4C, the radial baking patterns 2 and 3 formed on the outer side tend to form unevenness on the outer peripheral lines 21 and 23 violently. This is because the thermal power when forming the radial baking patterns 2 and 3 is stronger than the thermal power when forming the innermost third radial baking pattern 4, and when the skin burns as described above, It is considered that the burning range changes drastically by burning together, and affects the radiation mode such as how each radiation spreads. Therefore, in the case of a green bamboo material, it is possible to form radial baked patterns 2 and 3 rich in changes peculiar to the bamboo material different from the bamboo material that has been previously degreased (see FIGS. 6 and 7).

Next, the baking process which roasts the surface of the green bamboo material 10 with a burner was performed.
Specifically, as shown in FIG. 5, the region 24 excluding the region where the baking pattern has already been formed on the surface of the blue bamboo material 10, that is, the region 24 maintaining the blue color is, for example, from the top of the burner flame. Slightly exposed to part 17 earlier. In the first 5 to 8 seconds of exposure, the color of the region 24 changed from blue to substantially white. This is probably because the skin burned during this period and the color of the bamboo body appeared. Subsequent exposure to 5-7 seconds stopped the roasting when the color of region 24 changed from approximately white to ivory or amber. Then, the oil and fat that had oozed out on the surface was quickly wiped off with a cloth or the like.

In this manner, the region 24 is heated at a lower temperature (for example, approximately 500 ° C.) than the outer flame 14 to drain the oil, and the region 24 is baked in an ivory or amber color.
Then, by performing this firing step on the entire region 24, the region 24 excluding the region where the baking pattern has already been formed on the surface of the green bamboo material 10 is made to be a traditional bamboo-specific color such as ivory or amber. I changed the texture.

Next, a black ink application process was performed.
Specifically, ink was quickly applied to the edge 11 of the cylindrical body after the firing step, and the edge 11 of the cylindrical body was made black (see FIGS. 1 and 6). At this time, since the temperature of the blue bamboo material is high, the ink is sufficiently soaked into the edge of the bamboo material, and even when used for a long period of time, the black portion is less likely to fade.

Next, a wax application step of applying a plant-derived wax such as wood wax to the surface 18 was performed.
Specifically, after the ink application process, and before the temperature of the green bamboo material drops to a temperature at which the melted wax solidifies and loses its fluidity, the melted wax is dripped quickly onto the surface. Wax was applied. Finally, the surface was polished with a cloth.
Thus, by applying the wax while the temperature of the blue bamboo material is high, the liquid wax can be sufficiently impregnated into the fiber before the temperature of the bamboo material decreases and the fiber shrinks. Therefore, the surface of the bamboo material can be uniformly polished, and the moisture resistance of the bamboo product using the bamboo material can be improved and the life can be extended. Moreover, the time from the baking process to the completion of the wax coating process can be shortened, and the processing process can be shortened.
In addition, this wax application | coating process is suitable for the bamboo material of the shape where the heat heated by the baking process or the baking process cannot escape easily like the cylinder used for a cylindrical container etc., for example.

As described above, according to the present embodiment, the processed bamboo material in which the radial pattern having a substantially black and varied shape is formed in the traditional texture peculiar to ivory or scarlet bamboo can be easily and quickly performed. Moreover, it could be manufactured at a low cost. FIG. 6 shows an example of a bamboo container product 30 manufactured by the bamboo surface processing method of this embodiment.

[Example 2]
Hereinafter, Example 2 will be described mainly with reference to FIG.
In this embodiment, as the bamboo material, a long plate-shaped commercial building material 32 was used as shown in FIG. Specifically, the building material 32 is made of a long plate body obtained by vertically dividing a bamboo cylinder and adjusting the width and thickness, and has been subjected to oil draining treatment by the wet treatment method described above. By the oil draining process, the surface of the building material 32 was formed in a texture peculiar to bamboo such as ivory color or scarlet color.

First, the same baking process as described above is performed on the surface 18 'of the building material 32, and as shown in FIG. 7, a triple consisting of a fourth radial baking pattern 6, a fifth radial baking pattern 7, and a sixth radial baking pattern 8. A plurality of patterns 9 were formed. In the case of the building material 32, as shown in FIG. 7, the unevenness | corrugation of the outer periphery line of each radial baking pattern was formed in the gentle shape compared with the case of a blue bamboo material. This is presumably because the spread of combustion on the surface 18 ′ becomes gentle because the surface of the building material 32 has already been freed of oil and fat.

Next, a wax treatment step for treating the surface 18 'with plant-derived wax was performed.
Since the building material 32 of the present embodiment is formed in a long plate shape, the temperature of the building material 32 heated through the baking process is likely to decrease. Therefore, specifically, the melted wax was applied to the surface 18 ′, and the surface 18 ′ was roasted and heated again with a burner, and the wax was soaked into the building material 32.
Then, the surface was polished with a cloth or the like.

As described above, according to this embodiment, the building material 32 in which the substantially black radial pattern is formed in the traditional texture peculiar to bamboo such as ivory color or scarlet color can be manufactured easily and inexpensively in a short time. did it. The building material 32 according to the present embodiment has an increased utility value as a building material used in, for example, the entrance of a Japanese house or a tea room.

Although the crater 12 has been described as being cylindrical in this embodiment, the shape of the crater is not limited to a cylindrical shape, and may be an elliptical cylinder or a polygonal cylinder.
In addition, although it has been described on the premise of manual work, it is automated using, for example, a bamboo material holding mechanism that holds bamboo material in a predetermined posture, or a crater support mechanism that supports the burner's crater on the surface side of the bamboo material so as to be freely separated. The method may be used.

As described so far, according to the bamboo material surface processing method of the present embodiment, the radial seizure patterns 2, 3, 4, 6, 7, 8 on the surfaces 18, 18 'of the bamboo materials 10, 32 are simple and inexpensive. The bamboo surface processing method which forms can be provided.

As described above, some of the embodiments of the present invention have been described in detail with reference to the drawings. However, these are merely examples, and the present invention is variously modified and improved based on the knowledge of those skilled in the art. Can be implemented.

2,3,4,6,7,8 Radial baking pattern 10 Bamboo (blue bamboo)
11 Edge 12 Tinder
14 Outer flame 16 Inner flame 18, 18 'Skin side surface 20 Flame 32 Bamboo material (building material)

Claims (6)

A bamboo material surface processing method for forming a baking pattern on the surface of a bamboo material,
A baking process for forming a radial baking pattern using an external flame of the flame by spraying a flame ejected from the crater on the surface for a short time in a state where the cylindrical crater of the burner is brought close to the surface. Bamboo surface processing method including. The bamboo material surface processing method according to claim 1, wherein the baking step includes adjusting a heating power of the flame to form a plurality of the baking patterns in a substantially concentric shape. The bamboo material is made of green bamboo material,
The area | region except the area | region where the said baking pattern was formed among the said surfaces is roasted with the said burner, and while the oil is drained of the said area | region, the baking process of baking the said area | region in ivory color or amber color is included. The bamboo surface processing method as described in 2. Applying a wax to the surface, wherein the molten wax is applied to the surface after the firing step and before the temperature of the bamboo drops to a temperature at which the melted wax solidifies and loses its fluidity. The bamboo material surface processing method of Claim 3 including a wax application | coating process. The blue bamboo material is a cylindrical body,
The bamboo material surface processing method according to claim 4, further comprising a black ink application step of applying black ink to an edge of the cylindrical body between the firing step and the wax application step. The bamboo material is a long plate body that has been subjected to oil draining treatment,
The bamboo material surface processing method according to claim 1 or 2, further comprising a wax treatment step in which melted wax is applied to the surface after the baking step, and the surface is heated by heating with the burner.

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