JP2001079812A - Wood material coating machine and manufacture of wood material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood material coating machine which is capable of applying a coating in a recessed part such as a conduit in the surface of a wood material and filling the recessed part with the coating and further, can be easily cleaned with the capability to efficiently coating a variety of small-lot products as well as a method for manufacturing the wood material. SOLUTION: The wood material coating machine 20 comprises a coating means 22 which applies a coating 27A to the surface 10A of a wood material 10 and scraping rolls 42A, 42B which scrape a surplus coating 27A or the like off the surface 10A. The coating means 22 has a switching valve 35 with a liquid outflow aperture 35A and a plurality of liquid inflow apertures 35B and the like, a spray gun 38 and piping 40 for connecting these members. A cleaning liquid 26 is supplied to one of the liquid inflow apertures 35B and the like of the switching valve 35 by means of a cleaning liquid pump 29 and the coating 27A and the like are supplied to the other by means of a coating pump 30A and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden material coating machine for applying a paint to a wooden material and a method for manufacturing the wooden material, and more particularly to a wooden material for applying and filling a paint to a concave portion such as a conduit on the surface of the wooden material. The present invention relates to a coating machine and a method for manufacturing a wooden material.

[0002]

2. Description of the Related Art Conventionally, in order to make wood grain and the like of a wood material look more beautiful, a paint such as a brown water-based coloring agent is applied and filled into a concave portion such as a conduit on the surface of the wood material to emphasize the wood grain and the like. It is widely done. In performing such a coloring process, usually, a wood coating machine 80 shown in FIG.
A so-called wiping coater is used. The wood coating machine 80 includes a sponge roll 81 for transferring and applying a paint 84, and a transport roll 83 disposed opposite to the sponge roll 81 and transporting the wood 70. The sponge roll 81 holds the paint 84 between the sponge roll 81 and the applicator 82, and can sequentially send out the paint 84.

The wood coating machine 80 is provided with two pairs of scraping rolls 85A and 85B for scraping off excess paint 84 applied on the surface 70A of the wood 70, and feed rolls 86A and 86B opposed thereto. And The scraping rolls 85A and 85B are provided with blades 87A and 87B for collecting the scraped paint 84, respectively.

When the wooden material 70 is put into the wooden material coating machine 80, the wooden material 70 is conveyed while being sandwiched between the opposing sponge roll 81 and the feed roll 83. At the same time, the sponge roll 81 and the applicator 82
Is transferred from the sponge roll 81. Subsequently, the wooden material 70 is removed from the scraping roll 85.
A, 85B and the feed rolls 86A, 86B, while passing through the wood material 70 by the scraping rolls 85A, 85B.
The surplus paint 84 on the surface 70 </ b> A is scraped off, and only the concave portion of the wooden material 70 is filled with the paint 84. The scraped paint 84 is collected by the blades 87A and 87B and reused. In this way, the paint 84 is applied and filled into the recesses such as the conduits on the surface 70A of the wood material 70, and the wood material 7
The grain of 0 is emphasized and looks beautiful. After the application and filling of the paint, the paint is dried by a known dryer or the like.

[0005]

However, such a wood coating machine 80 can be used to replace the paint 84 to be used with another paint, or to wash the wood coating machine 80 at the start of work or at the end of work. A long time and a large amount of cleaning liquid are required for cleaning. This is particularly because it takes time and effort to wash the paint 84 soaked in the sponge of the sponge roll 81. For this reason, especially the wooden material 70 to be painted
Is small, it often takes much more time to clean the wood coating machine 80 than to actually paint with the wood coating machine 80. That is, when a small amount of various kinds of products are manufactured, the production efficiency is significantly deteriorated.

The present invention has been made in view of the above situation, and applies a paint to a concave portion such as a conduit on the surface of a wooden material.
It is an object of the present invention to provide a wood coating machine and a method for manufacturing wood, which can be filled, can be easily washed, and can efficiently coat a large number of products in a small amount.

[0007]

Means for Solving the Problems, Action and Effect The solution is to provide a wood coating machine for applying and filling a paint on a concave portion on the surface of a wood, wherein a liquid outlet and a plurality of liquid inlets are provided. A switching mechanism in which the cleaning liquid is supplied to one of the plurality of liquid inlets, and the paint is supplied to the other one or more liquid inlets, and one or more coating guns; A coating means having a pipe for supplying the cleaning liquid or the paint from the liquid outlet of the switching mechanism to the one or more coating guns, and the paint sprayed from the coating gun is applied to the surface and transported. A scraper roll for scraping excess paint from the surface of the wood material.

[0008] The wood coating machine of the present invention has a coating means for spraying and applying a paint to the surface of the wood. In this coating means, by switching the liquid inlet connected to the liquid outlet by the switching mechanism, the paint and the cleaning liquid can be switched and supplied to the coating gun. Therefore, the coating means can supply not only the paint from the coating gun through the pipe but also the cleaning liquid to the coating gun through the pipe.

Therefore, the piping and the coating gun can be easily cleaned, and the amount of a cleaning liquid such as an organic solvent or water used for cleaning can be reduced. Therefore, when changing the paint used to a different color (for example, when changing from dark brown to light brown), or at the start of work or at the end of work, wash the wood coating machine with a sponge roll. Cleaning can be performed easily and in a short time as compared with a conventional wooden coating machine. In addition, if this wood material coating machine is used, even when a small amount of wood material is to be coated, or when frequent color changes, etc., the cleaning is easy and the cleaning time is short, so that it is possible to respond with high work efficiency. it can.

Here, regarding the switching mechanism of the coating means,
One that switches paint and cleaning liquid supplied from multiple liquid inlets and supplies them to the liquid outlet, that is, switches one of paint and cleaning liquid to supply it to the liquid outlet, and further supplies it to the coating gun Whatever is possible, for example,
Examples include a switching valve having an output port and a plurality of input ports, such as a color changer. Further, a switching mechanism that has a plurality of valves corresponding to the number of the cleaning liquid and the paint, and switches one of the paint and the cleaning liquid by opening and closing each valve to supply the switching to the coating gun may be used.

The coating gun may be any as long as it can spray the paint over the entire surface of the wooden material, and may be an airless spray gun which directly applies pressure to the washing liquid or the paint to spray it, or a washing liquid which uses compressed air. And an air spray gun for spraying paint. The airless spray gun is particularly excellent in that a paint can be efficiently applied to a wooden material and a spray amount per unit time can be increased. On the other hand, the air spray gun is particularly excellent in that the paint can be uniformly applied to the surface of the wooden material.

[0012] Further, in the wood coating machine, the sponge roll is located between the coating gun and the scraping roll and applies the paint to the surface of the wood. It is preferable to provide a wood material coating machine, comprising: elevating means for raising the sponge roll from the transport path of the wood material to the scraping roll to a position not in contact with the wood material.

Since the wood coating machine of the present invention has a sponge roll, a paint can be applied to the surface of the wood using the sponge roll instead of the coating means. Further, since the wood coating machine is provided with the elevating means, when applying the paint by the coating means, the sponge roll can be retracted upward from the transport path of the wood to a position not in contact with the wood. . That is, the paint can be applied to the wooden material by selecting one of the painting means and the sponge roll. Therefore, for example, when coating a small amount of wood material, a coating method is applied by a coating means, and when coating a large amount of wood material, an appropriate coating method (application means) such as applying a paint with a sponge roll is used. You can choose.

Further, the wood coating machine according to any one of the above, wherein the coating means has one or a plurality of pumps for pumping the coating material and the cleaning liquid, and the coating gun is an airless spray gun. It is preferable to use a wood coating machine characterized by the following.

According to the present invention, the coating gun is an airless spray gun, and in order to spray paint or the like from the airless spray gun, the wood coating machine has a pump for pumping the paint or the like. Compared to air spray guns, airless spray guns are less prone to mist during spraying, and because the sprayed paint is less likely to bounce off the surface of wood, the amount of paint discharged as mist with air Can be suppressed. Therefore, if the airless spray gun is used, the paint can be efficiently sprayed on the surface of the wooden material.

The pump can be installed, for example, in a pipe connecting between the switching mechanism and a paint gun (airless spray gun). In this case, the paint or the cleaning liquid supplied to the pipe from the liquid outlet of the switching mechanism is pumped by a pump and ejected from the coating gun. Further, the pump may be provided between a tank for storing the paint and the cleaning liquid and the liquid inlet of the switching mechanism. In this case, a plurality of pumps are installed according to the number of paints and cleaning liquids, and these pumps pump the paints and cleaning liquids toward the respective liquid inlets.

Further, in the above-mentioned wood material coating machine, the wood material having a width of 30 cm or more in a direction perpendicular to the conveyance direction can be conveyed at a conveyance speed of 50 m / min or more. The pump for pumping the paint,
It is good to use a wood coating machine characterized by being a plunger pump.

In order to improve the work efficiency of the coating, it is desired to increase the conveying speed of the wooden material as much as possible to increase the coating speed. At that time, it is necessary to increase the amount of paint sprayed per unit time according to an increase in the transport speed. Also, as the width in the direction perpendicular to the direction of transport of the wood material (hereinafter, also simply referred to as the width of the wood material) increases, the amount of paint to be sprayed needs to be increased. In the present invention, at least the pump for pumping the paint is a plunger pump. Since this pump can greatly increase the discharge amount per unit time, the above-mentioned wood material having a width of 30 cm or more is used.
Even when transported at a transport speed of 50 m / min or more, it is possible to apply a sufficient amount of paint necessary for painting. Therefore, this wood coating machine is not only high in work efficiency in washing, but also excellent in productivity in painting. Here, as for the transport of the wooden material, for example, a plurality of transport rolls may be arranged and installed, and the wooden material may be placed on the transport roll and transported. Alternatively, a belt conveyor may be provided, and a wooden material may be placed thereon and transported.

Further, the wood material coating machine according to any one of the above, wherein the spray amount Y of the paint from the coating gun is Y.
(Ml) is adjusted to an injection amount that satisfies the formula Y ≧ 1.3WX with respect to the width W (cm) in the direction orthogonal to the direction of transport of the wood material and the transport speed X (m / min) of the wood material. It is good to use a wood coating machine characterized by the possibility.

If the amount of paint sprayed from the paint gun is small,
Since the painted surface becomes mottled or the painted surface becomes uneven, a predetermined amount or more of the paint must be sprayed.
Further, the injection amount per unit time requires a large amount in proportion to the transport speed, and also requires a large amount in proportion to the width of the wooden material. Specifically, the paint injection amount is set to Y
(Ml), the width of the wood material is W (cm), and the transport speed is X (m).
/ Min), the injection amount Y (m) in the range of Y <1.3WX
In 1), spots and irregularities are easily formed on the painted surface.

However, the wood coating machine of the present invention has the formula Y
Paint injection amount Y (ml) so as to satisfy ≧ 1.3WX.
Can be adjusted. For this reason, the amount of paint required for painting can be applied to the wooden material according to the width of the wooden material and the transport speed of the wooden material. Here, the adjustment of the paint injection amount can be adjusted by, for example, a pump capable of adjusting the discharge amount and setting the injection amount from the paint gun in the above range. Further, a pressure adjusting valve or the like may be provided in the pipe so that the injection amount from the paint gun is in the above range.

Further, in the wood coating machine according to any one of the above, the spray amount Y of the coating material from the coating gun.
(Ml) with respect to the width W (cm) in the direction perpendicular to the direction of transport of the wood material and the transport speed X (m / min) of the wood material, the formula Y ≧ 1.3WX and the formula Y ≦ 2.4WX
It is preferable to use a wood coating machine characterized in that the injection amount can be adjusted to satisfy the above condition.

If the amount of paint sprayed from the paint gun is small,
Since the painted surface becomes mottled or the painted surface becomes uneven, a predetermined amount or more of the paint must be sprayed.
On the other hand, if the spray amount of the paint from the coating gun is too large, after application, when scraping off excess paint on the wooden material with a scraping roll,
It becomes difficult to sufficiently scrape. For this reason, there may be a problem that a large amount of excess paint that could not be scraped off by the scraping roll adheres to the side surface of the wooden material. Specifically, when the paint injection amount Y (ml) is Y <
In the range of 1.3WX, spots and unevenness are likely to be formed on the painted surface. On the other hand, when the injection amount Y (ml) is in the range of Y> 2.4 WX, the scraping is likely to be insufficient.

However, in the wood coating machine of the present invention, Y ≧
The paint spray amount Y (ml) can be adjusted so as to satisfy 1.3 WX and satisfy Y ≦ 2.4 WX. For this reason, according to the width of the wood material and the transport speed of the wood material, it is possible to apply more paint than necessary to the wood material, and to scrape off excess paint on the wood material with a scraper roll. Can be.

The wood coating machine according to any one of the above, further comprising a cleaning liquid pipe branched from the pipe and capable of supplying the cleaning liquid to the scraping roll, and installed in the cleaning liquid pipe. It is preferable to provide a wood coating machine characterized by comprising a cleaning liquid valve for opening and closing the cleaning liquid pipe.

According to the present invention, the wood coating machine has a cleaning liquid pipe capable of supplying a cleaning liquid to the scraping roll, and a cleaning liquid valve for opening and closing the pipe. For this reason, when cleaning the coating gun and the pipe, if the cleaning liquid valve is opened, the cleaning liquid supplied from the pipe of the coating means can also be supplied from the cleaning liquid pipe to the scraping roll. In other words, when cleaning the wood coating machine, the cleaning liquid can be supplied to the coating means to clean the coating gun and the piping, and the cleaning liquid can also be supplied to the scraping roll to clean the scraping roll. be able to.

Therefore, it is not necessary to separately prepare a cleaning liquid or a means for spraying the cleaning liquid to clean the scraping roll, and thus it is necessary to further efficiently clean the wooden coating machine. Can be. Here, the cleaning liquid pipe may be any pipe that can supply the cleaning liquid to the scraping roll. For example, the cleaning liquid may be applied to the scraping roll from a hole formed in the cleaning liquid pipe. Further, the cleaning liquid may have a spray nozzle and spray the cleaning liquid to the scraping roll.

Another solution is a method for producing a wooden material, in which a paint is applied to and filled in a concave portion on the surface of the wooden material,
A liquid outlet and a plurality of liquid inlets; a cleaning liquid is supplied to one of the plurality of liquid inlets, and the paint is supplied to another one or a plurality of liquid inlets; A switching mechanism, one or more coating guns, and a pipe for supplying the cleaning liquid or the paint from a liquid outlet of the switching mechanism to the one or more coating guns,
A paint application step of spraying the paint from the coating gun and applying the paint to the surface of the wooden material being transported, and a surplus of one or a plurality of scraping rolls from the surface of the wooden material being transported. A paint scraping step of scraping paint, and having a washing step of supplying the washing liquid to the pipe and the coating gun for washing when switching the paint to be used, at the start of work or at the end of work, This is a method for producing a wooden material.

According to the present invention, the paint is sprayed from the coating means in the paint application step to apply the paint to the wooden material, and in the paint scraping step, the excess paint on the wooden material is scraped off by the scraping roll. . Then, when the paint to be used is switched, or at the start of work or at the end of work, the cleaning liquid is supplied to the piping and the coating gun to perform cleaning. This coating means can switch between the paint and the cleaning liquid by the switching mechanism, so that the paint can be sprayed from the coating gun through the pipe or the cleaning liquid can be supplied to the coating gun through the pipe.

Therefore, in the cleaning step, it is sufficient to supply only the cleaning liquid by the switching means, so that the cleaning can be performed easily and in a short time as compared with the case of cleaning the conventional wood coating machine using the sponge roll. It can be carried out. further,
With such cleaning, the amount of the cleaning liquid to be used can be reduced. In addition, since the washing is easy and the washing time can be shortened, the wood can be efficiently produced even when a small amount of wood is to be applied or when the color is frequently changed.

Further, in the method for producing a wood material, the coating means includes one or more pumps for pumping the coating material and the cleaning liquid, the coating gun is an airless spray gun, The paint application step and the washing step may be a method for manufacturing a wooden material, wherein the paint or the washing liquid is pumped by the pump and ejected from the airless spray gun.

According to the present invention, in the paint applying step and the washing step, the paint or the washing liquid pumped by the pump is jetted from the airless spray gun. Compared to air spray guns, airless spray guns are less prone to mist during spraying, and because the sprayed paint is less likely to bounce off the surface of wood, the amount of paint discharged as mist with air Can be suppressed. Therefore, if the paint is sprayed using the airless spray gun in the paint application step, the paint can be efficiently applied to the surface of the wooden material.

Further, in the above method for producing a wood material, at least one of the pumps for pumping the paint is a plunger pump, and in the paint application step, the width of the paint in the direction perpendicular to the transport direction is limited to a plunger pump. It is preferable to provide a method for manufacturing a wooden material, wherein the paint is applied while the wooden material having a length of 30 cm or more is transported at a transport speed of 50 m / min or more.

According to the present invention, in the paint application step, the paint pumped by the plunger pump is sprayed onto the surface of the wooden material. Since the plunger pump can greatly increase the discharge amount per unit time, the above width is 30 cm.
Even if the above wooden material is transported at a transport speed of 50 m / min or more, a sufficient amount of paint required for coating the wooden material can be applied. Therefore, according to the production method of the present invention, the coating means can be easily washed in a short time.
Since the wooden material can be coated efficiently with a sufficiently high transport speed, the productivity of the wooden material can be further increased.

Further, in any one of the above-described methods for manufacturing a wood material, in the paint application step, the spray amount Y (ml) of the paint from the coating gun is orthogonal to the transport direction of the wood material. A width W (cm) in the direction in which the coating material is applied and a transport speed X (m / min) of the wood material, wherein the paint is applied within a range that satisfies the formula Y ≧ 1.3WX. It is better to use a method.

In the paint application step, if the amount of paint sprayed from the paint gun is small, spots and irregularities are formed on the painted surface.
A certain amount of paint must be sprayed. Further, the injection amount per unit time requires a large amount in proportion to the transport speed, and also requires a large amount in proportion to the width of the wooden material. Specifically, the injection amount of the paint is Y (ml),
Assuming that the width of the wood material is W (cm) and the transport speed is X (m / min), with the injection amount Y (ml) in the range of Y <1.3WX,
Spots and irregularities are easily formed on the painted surface. However, in the present invention, since the paint is sprayed so as to satisfy Y ≧ 1.3WX, it is possible to apply the required amount of paint to the wood according to the width of the wood and the transport speed of the wood. it can.

Further, in the method for producing a wood material according to any one of the above, in the paint application step, the spray amount Y (ml) of the paint from the coating gun is adjusted in a transport direction of the wood material. With respect to the width W (cm) in the orthogonal direction and the transport speed X (m / min) of the wood material, the formula Y ≧ 1.3WX,
In addition, a method of manufacturing a wooden material, characterized by applying the above-described paint, in a range satisfying the expression Y ≦ 2.4WX is preferable.

In the paint application step, if the amount of paint sprayed from the paint gun is small, spots and irregularities are formed on the painted surface.
A certain amount of paint must be sprayed. On the other hand, if the spray amount of the paint from the coating gun is too large, it becomes difficult to sufficiently scrape off excess paint on the wooden material with a scraping roll after application. Specifically, the injection amount Y (ml) of the paint is
In the range of Y <1.3WX, spots and unevenness are likely to be formed on the painted surface, and when the injection amount Y (ml) is in the range of Y> 2.4WX, the scraping tends to be insufficient. However, in the present invention, the paint is applied so as to satisfy Y ≧ 1.3 WX and Y ≦ 2.4 WX in the paint applying step. For this reason, according to the width of the wood material and the transport speed of the wood material, it is possible to apply more paint than necessary to the wood material, and to scrape off excess paint on the wood material with a scraper roll. Can be.

The method for producing a wood material according to any one of the above, further comprising a cleaning liquid pipe branched from the pipe and capable of supplying the cleaning liquid to the scraping roll, and provided in the cleaning liquid pipe. A cleaning liquid valve that opens and closes a cleaning liquid pipe, and the cleaning step supplies the cleaning liquid to the pipe and the coating gun to perform cleaning, and supplies the cleaning liquid from the cleaning liquid pipe to the scraping roll. It is preferable to use a method for producing a wooden material, which is characterized by washing.

According to the present invention, in the cleaning step, the cleaning liquid is supplied to the pipe and the coating gun to clean the pipe and the coating gun, the cleaning liquid valve is opened, and the cleaning liquid is supplied from the cleaning liquid pipe to the scraping roll. Also, clean the scraping roll. Therefore, in order to clean the scraping roll, it is not necessary to separately prepare a cleaning liquid or a means for spraying the cleaning liquid to clean the scraping roll, so that the working efficiency at the time of cleaning is further improved.

[0041]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entirety of the wood coating machine 20 of the present embodiment. This wood coating machine 20
Is placed in a concave portion such as a conduit on the surface 10A of the wooden material 10 indicated by a broken line in the drawing, for example, a paint 27A such as a brown aqueous coloring agent.
27B and 27C are applied and filled.

The wood coating machine 20 is provided with a coating means 22 for spraying a cleaning liquid (specifically, water or the like) 26 and for applying paints 27A, 27B and 27C to the surface 10A of the wood 10. . The coating means 22 includes a cleaning liquid tank 23 for storing a cleaning liquid 26 and paints 27A, 27B, 27.
Pumps are respectively connected to the three paint tanks 24A, 24B, 24C for storing C through pipes. Among these pumps, a cleaning liquid pump 29 for pumping the cleaning liquid 26 is a diaphragm pump, and paints 27A, 27
Paint pumps 30A, 30B, 30 for pumping B, 27C
C is a plunger pump.

The coating means 22 is provided with a liquid outlet 35A.
A switching valve 35 (switching mechanism), which is a so-called color changer, having an (output port) and four liquid inlets (input ports) including a cleaning liquid inlet 35B and three paint inlets 35C, 35D, and 35E. ing.
Each inlet of the switching valve 35 is connected to each of the pumps through a pipe. That is, of the four liquid inlets, the cleaning liquid 26 in the cleaning liquid tank 23 is supplied to the cleaning liquid inlet 35B by the cleaning liquid pump 29, and the paint inlets 35C, 35D, and 35E are supplied to the respective paint pumps 30A, 30B. , 30C, the paints 27A, 27B, in the respective paint tanks 24A, 24B, 24C.
27C is supplied.

The coating means 22 includes paints 27A and 27A.
In order to inject one of B and 27C to the surface 10A of the wooden material 10, a coating gun 38 which is an airless spray gun is provided. This painting gun 38 and the above-mentioned switching valve 35
Is connected to the liquid outlet 35A by a pipe 40.
A plurality of transport rolls 41 for transporting the wooden material 10 (two in the figure) are provided below the paint gun 38 and the pipe 40 (the lower part in the figure).
0 is not conveyed and the paint 27A, 2 is sprayed.
A tray 39 for receiving 7B and 27C is provided.

The wood material coating machine 20 of the present embodiment is
Excess paint 27 applied on surface 10A of wood material 10
A scraping roll 42 for scraping A, 27B, 27C
A, 42B and feed rolls 46A, 46B opposed thereto
And two pairs. In the scraping rolls 42A and 42B,
Blades 49A and 49B for collecting the scraped paints 27A, 27B and 27C are provided, respectively. The wood coating machine 20 includes the scraping rolls 42A, 4A.
A cleaning liquid pipe 55 branched from the pipe 40 of the coating means 22 is provided above 2B. A cleaning liquid valve 57 that opens and closes the cleaning liquid pipe 55 is provided in the cleaning liquid pipe 55.

In such a wood coating machine 20, the coating means 22 controls the cleaning liquid 26 and the paint 2 by the switching valve 35.
Any one of 7A, 27B and 27C can be switched and injected. Therefore, the paint tank 24A,
24B, 24C to paint pump 30A, 30B, 30C
One of the paints pressure-fed by the switching valve 35 and the pipe 40
In addition to the above, the cleaning liquid 26 pumped from the cleaning liquid tank 23 by the cleaning liquid pump 29 from the cleaning liquid tank 23 can be injected from the coating gun 38 through the switching valve 35 and the pipe 40.

Therefore, the cleaning valve is switched by the switching valve 35 to the cleaning liquid pump 29 and the switching valve 35 from the cleaning liquid tank 23.
By supplying the cleaning liquid 26 through the pipe, the pipe 40 and the coating gun 38 to which the paint has adhered can be easily cleaned. Therefore, for example, when the paint to be used is changed (for example, the paint 27A is changed to the paint 27B), at the start of work, or at the end of work, the pipe 40 and the coating gun 38 can be easily and quickly cleaned. Further, the amount of the cleaning liquid 26 used at that time is smaller than that required for cleaning a conventional wood coating machine.

The paints 27A, 27B and 27C are directly pressurized by paint pumps 30A, 30B and 30C, respectively, and are sprayed from a paint gun 38 which is an airless spray gun. Therefore, at the time of spraying, the paints 27A, 27
B, 27C hardly become mist, and the sprayed paint 27
Since there is little rebound from the surface 10A of the wood material 10 of A, 27B, 27C, the paints 27A, 27B, 27C can be applied to the wood material 10 efficiently.

Each of the paint pumps 30A, 30B, and 30C for pumping the paints 27A, 27B, and 27C is a plunger pump having a very large discharge amount per unit time. For this reason, the width of 30 c is
m or more of the wood material 10 is conveyed at a conveyance speed of 50 m / min or more, and a sufficient amount of paint 2 is applied to the surface 10A of the wood material 10.
7A, 27B and 27C can be applied. In addition,
Cleaning liquid pump 29 and paint pumps 30A, 30B, 30
All pumps C are installed between the switching valve 35 and the cleaning liquid tank 23 or the coating tanks 24A, 24B, and 24C. , 27B, 27C
Is easily pumped, and therefore, is easily supplied to the coating gun 38.

The wood coating machine 20 includes a paint pump 3
By adjusting the discharge amount of 0A, 30B, 30C,
The injection amount Y (ml) of the paints 27A, 27B, and 27C from the paint gun 38 satisfies the formula Y ≧ 1.3WX with respect to the width W (cm) of the wooden material 10 and the transport speed X (m / min). ,
Furthermore, it can be adjusted in a range that satisfies the expression Y ≦ 2.4WX. For this reason, the necessary paints 27A, 27B, and 27C can be sufficiently applied according to the width and the transport speed of the wooden material 10, and then the scraping rolls 42 can be applied.
The surplus paints 27A, 27B, 27C can be reliably scraped off by A, 42B.

Further, since the wood coating machine 20 is provided with the cleaning liquid pipe 55 and the cleaning liquid valve 57, the cleaning liquid
6 is supplied to the pipe 40 and the coating gun 38 to clean them, and the cleaning liquid valve 57 is opened to open the cleaning liquid pipe 5.
By supplying the cleaning liquid 26 to the scraping rollers 42A and 42B from 5, the scraping rollers 42A and 42B can also be washed.

Next, a method of manufacturing the wood material of the present embodiment will be described with reference to FIGS. First, before the wooden material 10 is painted (at the start of work), in the washing process,
As shown in FIG. 2, the wooden material coating machine 20 is washed. Specifically, the cleaning liquid pump 29 is driven and the cleaning liquid tank 23 is driven.
The cleaning liquid 26 stored in the nozzle is fed to the switching valve 35 by pressure.
The switching valve 35 is connected to the cleaning liquid inlet 35B and the liquid outlet 35.
A is switched so as to be connected to the cleaning solution 26
Is made to flow through the pipe 40 and is sprayed from the coating gun 38. In this way, the pipe 40 and the paint gun 38 that are contaminated with paint or the like are washed. For this reason, the conventional sponge roll can be easily and quickly cleaned in a short time without the trouble of cleaning the sponge roll, and the amount of cleaning liquid can be reduced.

Further, while cleaning the pipe 40 and the coating gun 38 of the coating means 22, the cleaning liquid valve 57 in the cleaning liquid pipe 55 branched from the pipe 40 is opened, and the cleaning liquid 26 fed under pressure is scraped off from the cleaning liquid pipe 55 by a roll. 42A, 4
Wash over 2B. Therefore, the cleaning liquid 26 pumped from the cleaning liquid pump 29 can be used not only for cleaning the pipe 40 and the coating gun 38 but also for cleaning the scraping rolls 42A and 42B. For this reason, it is not necessary to separately prepare a cleaning liquid or a cleaning means for spraying the cleaning liquid in order to clean the scraping rolls 42A and 42B, so that the wooden material coating machine 20 can be efficiently cleaned.

In this embodiment, the cleaning liquid pump 29
Is a diaphragm pump, so the paint pump 30A,
The upper limit of the discharge amount per unit time is smaller than that of the plunger pumps used as 30B and 30C. However, the wooden material 10 is conveyed at a high speed and the paints 27A, 27
B, compared to the injection amount required to apply 27C,
Since the amount of the cleaning liquid 26 necessary for cleaning the wood coating machine 20 is sufficient, the wood coating machine 20 can be sufficiently efficiently cleaned even with a diaphragm pump.

After the washing of the wood coating machine 20, the coating 27A, 27B, 27C is applied to the surface 10A of the wood 10 in the coating step, as shown in FIG. Specifically, one of the paint pumps, for example, the paint pump 30A is driven, and the paint 27A stored in the paint tank 24A is pumped to the switching valve 35. Switching valve 3
5 is switched so that the paint inlet 35C and the liquid outlet 35A are connected, so that the paint 27A that has been fed under pressure flows through the pipe 40, and is sprayed from the paint gun 38. And
The paint 27A is sprayed on the surface 10A of the wooden material 10 while the wooden material 10 having a width of 30 cm in the direction perpendicular to the transport direction is transported by the transport roll 41 at a transport speed of 100 m / min. The injection amount of the paint 27A is determined by the paint pump 30
By adjusting the discharge amount of A, it is set to about 6000 ml / min.

At this time, in this embodiment, the paint 27A is directly pumped by the paint pump 30A, and the paint gun 38 is an airless spray gun.
Is less likely to become a mist, and is efficiently sprayed on the surface 10A of the wooden material 10. Further, since the paint pump 30A is a plunger pump having a large discharge amount per unit time, a sufficient amount of the paint 27A is jetted even when the wooden material 10 having a width of 30 cm is transported at a transport speed of 100 m / min. be able to.

The wood material 10 having the surface 10A coated with the paint 27A is then transported to the scraping rolls 42A, 42B. Then, in the paint scraping step, the wooden material 10 is surplus on the surface 10A of the wooden material 10 by the scraping rolls 42A, 42B while passing between the scraping rolls 42A, 42B and the feed rolls 46A, 46B. The paint 27A is scraped off, and only the concave portion of the wooden material 10 is filled with the paint 27A. The scraped paint 27A is a blade 49A, 49B.
And is returned to the paint tank 24A again for reuse. In this way, the paint 27A is applied and filled into the concave portion such as the conduit on the surface 10A of the wooden material 10.

When the paint to be used is changed (for example, when the paint 27A is changed to the paint 27B), the wood coating machine 20 is washed again in the washing step, and the pipe 40, the coating gun 38, the scraping rolls 42A, Wash off paint and the like attached to 42B. After that, a paint application step and a paint scraping step are performed to apply and fill the switched paint on the surface 10A of the wooden material 10. Also in this case, the pipe 40 is required in the cleaning process.
The cleaning liquid 26 is supplied to the coating gun 38 and the cleaning liquid 26 is supplied from the cleaning liquid pipe 55 to the scraping rolls 42A and 42B.
Is supplied, the wood coating machine 20 can be easily and quickly cleaned.

Also at the end of the work, the wood coating machine 20 is washed in the washing step to wash away the paint on the pipe 40, the coating gun 38, the scraping rolls 42A and 42B, and the like. Also in this case, by supplying the cleaning liquid 26 in the cleaning step, the wooden coating machine 20 can be cleaned easily and in a short time.

Regarding the wood coating machine 20 and the method of manufacturing the wood according to the present embodiment, the relationship between the transport speed of the wood 10 and the injection amount of the paint 27A from the coating gun 38 was examined as follows. That is, the transport speed of the wooden material 10 and the coating gun 3
The wooden material 10 was painted by changing the injection amount from 8 in various ways, and the state of the surface 10A (painted surface) of the wooden material 10 after painting was examined. The transport speed was investigated in three stages of 30, 50 and 100 m / min. Then, based on the results, the minimum injection amount necessary for coating the wooden material 10 was determined by the transport speeds 30, 5 and 5.
It was determined for each of 0 and 100 m / min. Also, regarding the maximum injection amount capable of sufficiently scraping the surplus paint 27A and the like in the paint scraping step, the transport speeds 30, 50,
It was determined for each of 100 m / min. The graphs created based on these results are shown in FIG.

As can be seen from this graph, in order to apply a required amount of the paint 27A or the like to the surface 10A of the wooden material 10 having a thickness of 30 cm used in the survey, the spray amount of the paint 27A or the like is set to Y.
(Ml), assuming that the transport speed of the wooden material 10 is X (m / min), it is necessary to satisfy Y ≧ 40X. In addition, wood material 1
In order to reliably scrape the surplus paint 27A etc. from the surface 10A of the zero, the injection amount of the paint 27A etc. is represented by Y (ml).
It is necessary to satisfy ≦ 72X. Also, by changing the width of the wooden material 10 in various ways, the surface 10A of the wooden material 10
It was also found that when the paint 27A or the like was applied, the required injection amount increased in direct proportion to the width of the wooden material 10. Furthermore, it turned out that the upper limit of the injection amount for reliably scraping the surplus paint 27A etc. also increases in direct proportion to the width of the wooden material 10.

Therefore, based on these results, the amount of the paint 27A and the like necessary for painting can be applied to the surface 10A of the wood material 10 because the injection amount of the paint 27A and the like is Y (ml), the wood material 1
0 is W (cm), and the transport speed of the wooden material 10 is X (m /
Min), it was found that the injection amount Y was a time when Y ≧ 1.3WX was satisfied. Furthermore, the surface 10 of the wooden material 10
It was found that the surplus paint 27A and the like can be reliably scraped off from above A when the injection amount Y satisfies Y ≧ 2.4WX. From this, if the paint 27A or the like is sprayed from the paint gun 38 so as to satisfy the above equation, it is possible to manufacture a wood material without coating failure. From the above investigation, as shown in FIG. 4, assuming that the injection amount of the paint 27A or the like is Y (ml), the width of the wooden material is W (cm), and the transport speed of the wooden material is X (m / min). , The injection amount Y is approximately Y
= 2WX, it was found that a wood material free from defective paint could be produced most reliably.

(Modification) Next, a modification of the embodiment will be described with reference to FIG. The wood coating machine 120 includes a coating gun 38 and scraping rolls 42A and 42B.
The point that a sponge roll 65 and a feed roll 66 facing the sponge roll 65 are provided between
Different from 0. In addition, this sponge roll 65 is
Another difference is that a lifting means 68 is provided which can be raised to a position where it is not in contact with zero. Except for these points, since it is the same as the above-described wood coating machine 20, its description will be omitted or simplified.

The sponge roll 65 of the wood material coating machine 120 can hold the paint 27A and the like between the applicator 67 and the like and sequentially send it out to apply it to the surface 10A of the wood material 10. Therefore, the paint 27 from the coating means 22
When the wooden material 10 is put in a state in which the injection of A or the like is stopped, the wooden material 10 is transported while being sandwiched between the opposing sponge roll 65 and the transport roll 66, and is directed toward the sponge roll 65 side. The paint 27A and the like held between the sponge roll 65 and the applicator 67 are transferred from the sponge roll 65 to the surface 10A of the wooden material 10 thus obtained.
Thereafter, the wooden material 10 is transported to the scraping rolls 42A and 42B, where excess paint 27A and the like are scraped off, and the concave portion of the wooden material 10 is filled with the paint 27A and the like. As described above, the wood coating machine 120 of the present modified embodiment can apply the paint 27A or the like to the surface 10A of the wood 10 by the sponge roll 65.

When the sponge roll 65 is raised by the lifting / lowering means 68, the sponge roll 65 is
Can be retracted from the transport path of the vehicle. Therefore, when the paint 27A or the like is applied by the coating means 22, if the sponge roll 65 is retracted upward, the wood material 10 on which the paint 27A or the like is applied by the coating means 22 is coated with the wood material of the above embodiment. In the same manner as in the machine 20, it is transported as it is to the scraping rolls 42A and 42B, where the excess paint 27A
Etc. are scraped off. In this modification, the lifting means 6
As 8, the known gap adjusting mechanism for adjusting the gap between the sponge roll 65 and the feed roll 66 according to the width of the wooden material 10 to be originally coated is used. Specifically, by turning a handle (not shown), the sponge roll 65 and the applicator 67 connected to the handle through a shaft, a gear, or the like are used to transfer the wood material 1 being conveyed as indicated by a broken line in the figure.
It is raised to a position where it does not touch 0.

As described above, the wood coating machine 120 of the present modified embodiment can apply the coating material 27A or the like by the sponge roll 65 or can apply the coating material 27A or the like by the coating means 22. Therefore, for example, when coating a small amount of the wooden material 10, the paint 27 A is applied to the wooden material 10 by the coating means 22, and when coating a large amount of the wooden material 10, the sponge roll 65 is applied to the wooden material 10. Paint 27
It is convenient because an appropriate application method such as application of A or the like can be selected.

Further, the wood coating machine 120 of this modified embodiment
Can be manufactured by modifying a conventional wood coating machine (see FIG. 6) for applying a paint using a sponge roll, and attaching the coating means 22, the cleaning liquid pipe 55, the cleaning liquid valve 57, and the like. For this reason, the wood coating machine 120 can be manufactured at low cost using conventional equipment.

In the above, the present invention has been described with reference to the respective embodiments. However, the present invention is not limited to the above embodiments and the like, and may be appropriately modified and applied without departing from the gist thereof. Needless to say. For example, in the above embodiment and the like, the cleaning liquid tank 23 and the paint tank 24A,
Although pumps are provided by the number of pumps 24B and 24C, for example, one pump is installed in the pipe 40, and the cleaning liquid 26 or the paint 27 switched by the switching valve 35 by this pump.
A, 27B, and 27C may be pressure-fed. By reducing the number of pumps in this way, the cost of the wood coating machine is reduced. In such a case, as described above, if the pump is a plunger pump, the upper limit of the injection amount can be increased, so that the paint 27A or the like can be applied while the wooden material 10 is conveyed at a high speed.

In the above embodiment, three paint tanks 24A, 24B, and 24C are used and three kinds of paint 27 are used.
A, 27B, and 27C can be switched, but a wood coating machine that can switch more paints can also be used. Alternatively, a wood coating machine that switches between one type of paint and the cleaning liquid 26 may be used. Also in this case, when cleaning the wood coating machine, such as at the start of work or at the end of work, the switching mechanism may be switched so that the cleaning liquid 26 is pumped, so that cleaning can be performed easily and in a short time. .

In the above embodiment, the paint 27A is sprayed from one paint gun 38, but a plurality of paint guns may be provided. At that time, the coating guns can be arranged in the direction in which the wooden material 10 is conveyed, or in a direction perpendicular to the direction of conveyance. Even in such a case, as described above, it is preferable to use an airless spray gun in order to reduce the rebound of the paint, as described above.

In the above-described embodiment, a switching valve 35, which is a so-called color changer, is used as a switching mechanism. For example, valves are provided in pipes from the cleaning liquid tank 23 and the paint tanks 24A, 24B, 24C, respectively. By opening and closing the valve, a switching mechanism that switches the supplied cleaning liquid 26 or paints 27A, 27B, and 27C can also be used.

In the above embodiment, the cleaning liquid 26 is put into the cleaning tank 23 and the cleaning liquid 26 is supplied from the cleaning tank 23 by the cleaning liquid pump 29. For example, when water is used as the cleaning liquid 26, the water pipe is used. The water may be supplied directly from the faucet to the cleaning liquid inlet 35B of the switching valve 35. Even in this case, the pipe 40, the coating gun 38, the scraping rolls 42A, 4
Water can be supplied to 2B for cleaning.

In the above-described embodiment, the transport of the wooden material 10 by the transport roll 41 has been exemplified.
Any known method may be used, for example,
A belt conveyor or the like can also be used. Further, in the above embodiment, the adjustment of the injection amount from the coating gun 38 is adjusted by the coating pumps 30A, 30B, and 30C.
For example, a pressure adjustment valve or the like may be provided in the pipe 40 or the like, and the injection amount may be adjusted to a desired value.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a wood coating machine according to an embodiment.

FIG. 2 is a diagram illustrating a method of manufacturing a wooden material, and is an explanatory diagram illustrating a state in which a wooden material coating machine is cleaned.

FIG. 3 is a diagram illustrating a method of manufacturing a wooden material, and is an explanatory diagram illustrating a state in which the wooden material is coated.

FIG. 4 is a graph showing a relationship between a transport speed of a wooden material having a width of 30 cm and an injection amount of paint.

FIG. 5 is an explanatory view showing a wood coating machine according to a modified embodiment.

FIG. 6 is an explanatory view showing a conventional wood coating machine.

[Explanation of symbols]

Reference Signs List 10 Wood material 10A Surface (of wood material) 20, 120 Wood material coating machine 22 Painting means 23 Cleaning liquid tank 24A, 24B, 24C Paint tank 26 Cleaning liquid 27A, 27B, 27C Paint 29 Cleaning liquid pump 30A, 30B, 30C Paint pump 35 Switching Valve (switching mechanism) 35A Liquid outlet 35B Cleaning liquid inlet (liquid inlet) 35C, 35D, 35E Paint inlet (liquid inlet) 38 Painting gun 40 Piping 41 Transport rolls 42A, 42B Scraping roll 55 Cleaning liquid piping 57 Cleaning liquid Valve 65 Sponge roll 68 Elevating means

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B27K 5/00 B27K 5/00 H 5/02 5/02 A B27M 3/00 B27M 3/00 MF term (reference) 2B230 AA22 AA27 BA01 BA18 CC14 DA02 EA11 EB03 EB13 EB21 EC01 EC04 EC10 EC14 EC24 2B250 BA03 FA33 FA41 GA03 HA01 HA05 4D073 AA01 BB03 CC03 4D075 AA02 AA04 AA34 AA39 AA58 AA74 AA02 DBA40CA30 CA48

Claims (13)

[Claims] 1. A wood coating machine for coating and filling a concave portion on the surface of a wood material with a liquid outlet, a plurality of liquid inlets, and one of the plurality of liquid inlets. A switching mechanism for supplying a cleaning liquid to the liquid inlet, and a coating liquid to one or more other liquid inlets, one or more coating guns, and a liquid outlet of the switching mechanism for supplying the cleaning liquid or the coating liquid A coating means for supplying the paint from the coating gun to the one or a plurality of coating guns; and scraping excess paint from the surface of the wooden material to be conveyed, wherein the paint sprayed from the coating gun is applied to the surface. A wood coating machine comprising: one or a plurality of scraping rolls. 2. A wood coating machine according to claim 1, wherein said sponge roll is located between said coating gun and said scraping roll and applies said coating material to a surface of said wood material. A wood coating machine, comprising: lifting means for raising the sponge roll from the transport path of the wood material from the coating gun to the scraping roll to a position not in contact with the wood material. 3. The wood coating machine according to claim 1, wherein said coating means press-feeds said paint and said cleaning liquid.
Alternatively, the wood coating machine has a plurality of pumps, and the coating gun is an airless spray gun. 4. A wood coating machine according to claim 3, wherein said wood material having a width of 30 cm or more in a direction perpendicular to the conveying direction can be conveyed at a conveying speed of 50 m / min or more, A wood coating machine wherein at least one of the pumps for pumping the paint is a plunger pump. 5. The wood coating machine according to claim 3, wherein the spray amount Y (ml) of the coating material from the coating gun is adjusted in a direction perpendicular to a direction in which the wooden material is conveyed. With respect to the width W (cm) and the transport speed X (m / min) of the wood material, the formula Y ≧
A wood material coating machine characterized in that the injection amount can be adjusted to satisfy 1.3 WX. 6. The wood coating machine according to claim 3, wherein the spray amount Y (ml) of the paint from the coating gun is set in a direction orthogonal to a direction in which the wood is transported. With respect to the width W (cm) and the transport speed X (m / min) of the wood material, the formula Y ≧
A wood coating machine characterized in that the injection amount can be adjusted to 1.3WX and an injection amount that satisfies the formula Y ≦ 2.4WX. 7. The wood coating machine according to claim 1, wherein the cleaning liquid pipe branches off from the pipe and can supply the cleaning liquid to the scraping roll. A washing liquid valve installed in the inside and opening and closing the washing liquid pipe. 8. A method for producing a wood material in which a paint is applied to and filled in a concave portion on a surface of the wood material, the method comprising: providing a liquid outlet and a plurality of liquid inlets; A switching mechanism in which a cleaning liquid is supplied to the liquid inflow port and a coating liquid to the other one or more liquid inflow ports, one or a plurality of coating guns; Pipes for supplying from the outlet to the one or more coating guns,
A paint application step of spraying the paint from the coating gun and applying the paint to the surface of the wood material being transported; and a surplus of one or more scraping rolls from the surface of the wood material being transported. A paint scraping step of scraping the paint, comprising: a washing step of supplying the washing liquid to the piping and the coating gun to wash when the paint used is switched, at the start of work or at the end of work. Wood material manufacturing method. 9. The method for producing a wood material according to claim 8, wherein said coating means press-feeds said paint and said cleaning liquid.
Or a plurality of pumps, wherein the coating gun is an airless spray gun, wherein the paint application step and the cleaning step include pumping the paint or the cleaning liquid with the pump and ejecting the paint or the cleaning liquid from the airless spray gun. Characteristic wood material manufacturing method. 10. The method for producing wood material according to claim 9, wherein at least one of the pumps for pumping the paint is a plunger pump, and the paint application step is orthogonal to a transport direction. Direction width 3
A method for producing a wooden material, comprising applying the paint while transporting the wooden material of 0 cm or more at a transport speed of 50 m / min or more. 11. The method for producing a wood material according to claim 9 or 10, wherein the coating amount of the coating material from the coating gun is determined by changing a spray amount Y (ml) of the coating material from the coating gun. The width W (cm) in the direction perpendicular to the transport direction and the transport speed X (m /
A method for producing a wooden material, characterized by applying the above-mentioned paint within a range that satisfies the formula Y ≧ 1.3WX. 12. The method for producing a wood material according to claim 9, wherein the coating amount of the coating material from the coating gun is adjusted so that the spray amount Y (ml) of the wood material is reduced. The width W (cm) in the direction perpendicular to the transport direction and the transport speed X (m /
Minute), the expression Y ≧ 1.3WX and the expression Y ≦
A method for producing a wooden material, wherein the coating material is applied within a range satisfying 2.4 WX. 13. The method for producing a wood material according to claim 8, wherein the cleaning liquid is branched from the pipe and is capable of supplying the cleaning liquid to the scraping roll. A cleaning liquid valve that is installed in the pipe and opens and closes the cleaning liquid pipe; and the cleaning step supplies the cleaning liquid to the pipe and a coating gun for cleaning, and also includes the cleaning liquid pipe in the scraping roll. A method for producing a wooden material, comprising: supplying the above-mentioned cleaning solution from above to perform cleaning.