JPH0796247A - Paint supply method for roll coater of architectural veneer - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents turbulence in the supply of paint and prevents uneven coating even when a paint with low hiding power is used for the object to be coated. To prevent
Try to get a good appearance. [Structure] A feed roll 3, a coating roll 5 arranged to face the feeding roll 3, and a doctor roll 6 arranged between the coating roll 5 and a coating pool 8 for storing a coating 4 therein. It has and. Then, from a position substantially parallel to the lengthwise direction of the coating roll 5 and the doctor roll 6,
The coating material 4 is supplied to the coating material reservoir 8 in a continuous state of the coating roll 5 and the doctor roll 6 in the lengthwise direction so as to form one continuous strip. Alternatively, the coating material 4 is supplied to the coating material reservoir 8 in a state in which the coating roller 5 and the doctor roller 6 are dispersed in the lengthwise direction so as to form a plurality of linear shapes or a plurality of belt-like shapes which are interrupted in the lengthwise direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a coating material to a roll coater for a decorative sheet for a building, and more particularly to a roll for a decorative sheet for a building, which is capable of uniformly coating a coating object such as a plate-like object. The present invention relates to a paint supply method in a coater.

[0002]

2. Description of the Related Art Conventionally, a roll coater of this type is shown in FIG.
As shown in FIG. 3, the coating roll b is arranged so as to face the feed roll a, and the doctor roll c is provided so as to form a paint pool d between the doctor roll c and the coating roll b, while above the paint pool d. Is provided with a paint supply means e. Then, while the paint f is supplied from the paint supply means e to the paint pool d, the paint f is sent by passing the coating object g of the plate-like object to be coated through between the feed roll a and the coating roll b. , When this coated object g is fed by the feed roll a,
The paint f from the paint pool d is supplied to the surface of the application roll b while the application amount is adjusted by the application roll b and the doctor roll c, and the paint f is applied to the application roll b and the object to be coated g.
It is adapted to be applied to the object to be coated g on the sliding contact surface with.

[0003]

In the roll coater described above, the coating material supply means e is constructed by connecting the supply nozzle h to the supply pipe h, and the coating material f is supplied with the coating material f at approximately the center of the coating material reservoir d. I am trying to supply it. Therefore, since the paint f is supplied to one place substantially in the center of the paint pool d, a turbulent flow is apt to occur in the paint f around the supply portion, and the turbulent flow causes the paint f to be applied to the object to be coated. When applied, there was a problem that a coating unevenness j with a thin coating thickness occurred.

When the coating f to be used is a normal coating f having a high hiding property, this coating unevenness j has little effect of deteriorating the appearance when it is used as a decorative sheet for construction, but it is transparent or semi-transparent. In the case of a coating material f having a low hiding property such as a transparent coating material, since the coating thickness is thin, a difference in color and luster is likely to occur. In particular, there is a case where such a coating material f having a low hiding property is applied to the top layer of the decorative board for construction, and the above-mentioned coating unevenness j
However, there is a problem that the difference in color and gloss easily occurs and the commercial value is inferior.

The present invention has been made in view of the above problems, and prevents turbulent flow upon supply of the coating material, and even when a coating material having a low hiding property is used as an object to be coated, uneven coating is caused. The purpose is to prevent the occurrence of color difference and gloss difference, and to obtain a good appearance.

[0006]

In order to achieve the above-mentioned object, the means taken by the present invention is to supply the paint to the paint reservoir in a wide state or a dispersed state.
Specifically, the means taken by the invention according to claim 1 is as follows.
Between a feed roll that feeds the article to be coated in a predetermined feed direction, a coating roll arranged so as to face the feed roll with the article to be coated, and between the coating roll that is provided in parallel with the coating roll. A roll coater having a doctor roll arranged so as to form a paint reservoir for accumulating paint to be coated on an object to be coated. Then, from the position substantially parallel to the length direction of the coating roll and the doctor roll, the continuous 1
In a continuous state in the length direction so as to form one strip, or in a state in which the coating roll and the doctor roll are discontinuous in the length direction so as to form a plurality of lines or a plurality of strips that are intermittent in the length direction. The above paint is supplied to the paint reservoir.

[0007]

With the above construction, in the invention according to claim 1,
When the feed roll is rotated, the article to be coated is fed in a predetermined feed direction through between the feed roll and the coating roll,
The coating material applied to the object to be coated is supplied to the coating material reservoir from a supply nozzle, for example. At the time of supplying the paint to the paint reservoir, the paint is supplied in the form of a belt having a predetermined width continuous in the length direction of the coating roll and the doctor roll, or in the length direction of the coating roll and the doctor roll. It is supplied in the form of a plurality of line-shaped or a plurality of strips arranged side by side. After that, the coating material supplied to the coating material reservoir is applied to the surface of the coating object from the surface of the coating roller while the coating amount is adjusted by the doctor roller. As a result, the turbulent flow of the paint in the paint reservoir is prevented, uneven coating does not occur, and a decorative decorative board with a good appearance is produced. In particular, even when a coating having a low hiding property is applied to the top layer of a decorative board for construction, there is no coating unevenness, and there is a very remarkable effect of not causing a difference in color and luster.

[0008]

Therefore, according to the present invention, the coating roll and the doctor roll are continuous strips in the lengthwise direction, or the plurality of linear or plural strips are intermittently provided in the lengthwise direction between the coating roll and the doctor roll. Since the paint is supplied in a strip shape to the paint reservoir, the paint is not supplied to one place in the paint reservoir as in the past, but the paint is spread or dispersed in the length direction of the coating roll and the doctor roll. As a result, turbulent flow can be reliably prevented from occurring in the paint reservoir.
As a result, since it is possible to apply the coating on the article to be coated without unevenness in the coating, it is possible to achieve a good appearance with no difference in color and luster. In particular, when a paint with low hiding power such as transparent paint or semi-transparent paint is used, there is no difference in color and luster even if the coating thickness is thin. There is a case where it is applied to the top layer of a decorative board for use, and in this case, there is no coating unevenness, and a very remarkable effect that there is no difference in color and luster is exhibited, so that the commercial value can be significantly improved. Moreover, when using a coating with a low concealing property for the top layer,
Generally, it is applied by spraying, but in the case of paint mixed with aggregates, spraying is likely to be clogged, so it is sometimes applied with a roll coater.At this time, uneven coating does not occur, so a good appearance is finished The more remarkable effect of being able to do it will be exhibited.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, 1 is a roll coater in a decorative board for construction, which includes a feed roll 3 for an article to be coated 2, an application roll 5 for applying a coating material 4 to the article to be coated 2, and a doctor roll 6. And a paint supply means 7. The feed roll 3 feeds the article 2 to be coated, such as a plate-like object serving as a substrate of a decorative board for construction, in a predetermined direction (see arrow A in FIG. 1). The coating roll 5 is disposed above the feed roll 3 so as to face the feed roll 3, and the coating material 4 is applied to the article 2 that passes between the coating roll 5 and the feed roll 3.
Is to be applied. The doctor roll 6 is located behind the coating roll 5 with a slight distance from the coating roll 5, and a paint pool 8 is formed between the doctor roll 6 and the coating roll 5. ing. The paint supply means 7 is configured by connecting a supply nozzle 7b to the tip of a supply pipe 7a connected to a paint tank (not shown). The paint supply means 7 supplies the paint 4 stirred in the paint tank to the paint reservoir 8 by a supply pump.

Supply nozzle 7b in the paint supply means 7
Which is a feature of the present invention, is formed in a flat triangular shape, and is arranged above the paint reservoir 8 in a substantially parallel manner in the longitudinal direction of the coating roll 5 and the doctor roll 6. There is. The supply nozzle 7b is connected to the supply pipe 7a at the top of the triangle, spreads downward in the paint reservoir 8 and the lower end surface is positioned substantially parallel to the lengthwise direction of the coating roll 5 and the doctor roll 6. Supply port 7c for paint 4
Is formed in. In other words, the supply nozzle 7b is a strip that is continuous in the lengthwise direction of the coating roll 5 and the doctor roll 6 and has a width corresponding to the lateral width of the supply port 7c from the supply port 7c to the paint reservoir 8. As described above, the paint 4 is supplied to the paint reservoir 8 continuously in the lengthwise direction.

Next, the coating operation of the roll coater will be described. First, when the feed roll 3 is rotated, the article to be coated 2 is fed in the direction of the arrow A in FIG. 1 through between the feed roll 3 and the coating roll 5, while the paint supply means 7 is connected to a paint tank (not shown). The coating material 4 which has been agitated in the above is supplied to the supply nozzle 7b through the supply pipe 7a.

Then, the coating material 4 supplied to the supply nozzle 7b spreads in a fan shape from the top toward the supply port 7c in the supply nozzle 7b, and a strip having a width corresponding to the width of the supply port 7c, That is, the coating roll 5 and the doctor roll 6 are formed into a continuous strip having a predetermined width in the lengthwise direction, and the supply port is formed.
It is supplied to the paint reservoir 8 from 7c. Then, the coating material 4 in the coating material reservoir 8 is applied from the surface of the coating roller 5 to the surface of the article 2 to be coated while the coating amount is adjusted by the distance between the coating roller 5 and the doctor roller 6.

Therefore, according to this embodiment, the coating material 4 is supplied to the coating material reservoir 8 in the form of a continuous strip in the lengthwise direction of the coating roller 5 and the doctor roller 6 as in the conventional case. Since the paint 4 is not supplied to one location of the paint pool 8 and is spread in the lengthwise direction of the coating roll 5 and the doctor roll 6 and the paint 4 is supplied, turbulent flow is surely prevented in the paint pool 8. You can As a result, since it is possible to coat the article to be coated 2 without uneven coating, it is possible to achieve a good appearance with no difference in color and luster. In particular, when a coating material 4 having a low hiding property such as a transparent coating material 4 or a semi-transparent coating material 4 is used, a difference in color and luster does not occur even if the coating thickness is thin, and furthermore, such a hiding property is low. In some cases, the paint 4 may be applied to the top layer of a decorative board for construction, and in this case, there is no coating unevenness and the difference in color and luster does not occur. be able to. Moreover, when the coating material 4 having a low concealing property is used for the top layer, it is generally applied by spraying. However, in the case of the coating material 4 in which the aggregate is mixed, the spraying is likely to be clogged, so that it is applied by a roll coater. In this case, since coating unevenness does not occur, a more remarkable effect that a good appearance can be finished is exhibited.

FIG. 2 shows another supply nozzle 7d, which has a pipe shape instead of the triangular supply nozzle 7b in the previous embodiment. That is, although not shown, the supply nozzle 7d is formed of a pipe whose both end surfaces are closed, and a slit-shaped supply port 7e in the lengthwise direction is formed in the diagonally lower part over both ends. The supply nozzle 7d is connected to the supply pipe 7a at the upper end of the central portion, and the coating roll 5
And the doctor roll 6 are arranged in the longitudinal direction. Therefore, the coating material 4 supplied from the supply pipe 7a spreads in the length direction of the coating roll 5 and the doctor roll 6 at the supply nozzle 7d, overflows the supply port 7e, and is the same as in the previous embodiment. It becomes a band and the paint 4 is the paint puddle 8
Will be supplied to. As a result, it is possible to prevent the occurrence of coating unevenness and to finish the architectural decorative board with a good appearance. Other configurations, operations, and effects are similar to those of the previous embodiment.

In each of the above embodiments, the supply nozzle
Although the coating material 4 is supplied to the coating material reservoir 8 in a strip shape from the supply of 7d, the present invention may be supplied in a plurality of linear shapes or a plurality of strip shapes. That is, the supply ports 7c and 7e in FIG. 1 and FIG. 2 are formed by a plurality of openings such as elongated holes or round holes arranged in the length direction of the coating roll 5 and the doctor roll 6, and the paint reservoir 8 is formed through the openings. A plurality of linear supply paints 4 or narrow width supply paints 4 are formed,
The coating material 4 may be supplied to the coating material reservoir 8 in a state where the coating roller 5 and the doctor roller 6 are intermittently dispersed in the lengthwise direction. Also, in the embodiment of FIG.
Although the supply nozzle 7b is formed in a triangular box shape, the supply nozzle may be arranged so that a triangular flat plate is obliquely arranged to allow the coating material to flow down. That is, the supply nozzle is formed in the shape of a triangular dust collector having side pieces, the supply pipe 7a is connected to the top of the triangle, and is inclined downward over the bottom side located above the paint reservoir 8, The bottom side may serve as a supply port for the coating material 4, and the coating material 4 may be supplied in the form of a strip from this supply port. At that time, a plurality of grooves extending from the top to the bottom supply port may be formed in the flat plate portion of the supply nozzle to supply the coating material 4 in a plurality of linear shapes. In each of the above embodiments, the paint 4 supplied to the paint reservoir 8 is in the form of one strip, a plurality of lines, or a plurality of strips. That is, in a state where the paint 4 is continuous from the supply ports 7c, 7e. Although the paint 4 is supplied, the paint 4 may be supplied from the supply ports 7c and 7e in the form of drops that are intermittently connected to the paint reservoir 8.

[Brief description of drawings]

FIG. 1 is a perspective view showing a roll coater of the present invention.

FIG. 2 is a perspective view of a roll coater showing another supply nozzle.

FIG. 3 is a perspective view showing a conventional roll coater.

[Explanation of symbols]

 1 Roll coater 2 Substrate 3 Feed roll 4 Paint 5 Apply roll 6 Doctor roll 7 Paint supply means 7a Supply pipe 7b, 7d Supply nozzle 7c, 7e Supply port 8 Paint reservoir

Claims (1)

[Claims] 1. A feed roll for feeding an article to be coated in a predetermined feeding direction, a coating roll arranged so as to face the feed roll with the article to be coated, and a coating roller provided in parallel with the coating roll. A roll coater provided with a doctor roll arranged to form a paint pool for accumulating paint between the roll, the position being approximately parallel to the length direction of the coating roll and the doctor roll, A plurality of linear lines which are continuous in the length direction of the coating roll and the doctor roll so as to form one continuous strip in the length direction, or which are intermittent in the length direction of the coating roll and the doctor roll, or A paint supply method in a roll coater for a decorative board for construction, characterized in that the paint is supplied to a paint reservoir in a state of being dispersed in the length direction so as to form a plurality of strips.