JPH09314010A - Coating method and roll coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable partial coating by a roll coater. SOLUTION: A blade like coating material scraping member 26 formed narrower in width than a coating roll 12 is detachably mounted under a doctor roll 14 and the tip of the coating material scraping member 26 is brought into contact with the coating roll 12. A plate 6 to be coated is coated by supplying a coating material to a coating material pond 13 between the coating roll 12 and the doctor roll 14, rotating the coating roll 12 and a backup roller 16 and scraping partially the coating material stuck to the outer peripheral surface of the coating roll 12 with the coating material scraping member 26. As a result, when the plate 6 to be coated is passed through between the coating roll 12 and the backup roll 16, a part unnecessary to be coated is not coated even if the coating roll 12 is brought into contact with the plate 6 to be coated and only a part necessary to be coated is coated with the coating material stuck to the outer periphery surface of the coating roll 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating method and a roll coater for partially coating a coating plate with a coating material.

[0002]

2. Description of the Related Art Conventionally, a roll coater, as shown in FIG. 3, supplies coating material to a coating material reservoir 3 formed between a coating roller 1 and a doctor roller 2 while coating a coating roller 1 and a backup roller 4 with each other. And are rotated to feed the coated plate 5 between these two rolls 1, 4,
The coating plate 5 is coated with the coating material attached to the outer peripheral surface of the coating roll 1. At this time, since the coating material is spread over the entire outer peripheral surface of the coating roll 1, if the coating target plate 5 is a flat plate, the coating material is uniformly applied to the entire surface of the coating target plate 5.

For example, as a shelf board for storing furniture such as a closet, a wood board such as plywood, wood fiber board, and particle board is used. As shown in FIG. 4, the back surface of the shelf board 6 is coated with a sealer. By covering the back surface of the shelf board 6 with the sealer coating film 10, moisture absorption on the back surface side of the shelf board 6 is prevented, and further,
A synthetic resin sheet 9 for cosmetics is adhered to the surface of the shelf board 6, and a part 9a of the synthetic resin sheet 9 is also wrapped around the back surface side of the shelf board 6 to be attached, and then the shelf board 6 ( V-cut portion 7 is formed on the back surface of the wooden board, and an adhesive is applied to the V-cut portion 7 and its peripheral portion to bend it into an L-shape, and a cat with a triangular cross section on the back side of the bent portion. The plate 8 is adhered while being stapled to reinforce the shelf plate 6.
In this case, if the sealer coating is applied to the adhesive portion of the cat plate 8 or the back surface adhesive portion 9a of the synthetic resin sheet 9, the adhesive strength will decrease. Therefore, do not apply the sealer coating to these adhesive portions. There is a need to.

[0004]

However, since the sealer coating is performed by the roll coater described above, in the sealer coating step, the entire surface of the shelf board 6 (wood board) is coated with the sealer. For this reason, after the sealer coating, a very troublesome work of polishing and removing the sealer coating film on the adhesive portion of the cat plate 8 or the portion corresponding to the back surface adhesive portion 9a of the synthetic resin sheet 9 by sandpaper or the like is performed. However, it has the disadvantage of low production efficiency and high production cost.

The present invention has been made in view of the above circumstances, and therefore an object thereof is to provide a coating method and a roll coater capable of partially coating only a portion to be coated on a coated plate. To do.

[0006]

In order to achieve the above object, the present invention provides a coating roll, a doctor for forming a paint reservoir between the coating roll, and a doctor located below the coating roll. A method for partially coating the plate to be coated using a roll coater equipped with a backup roll that conveys the plate to be coated while sandwiching the plate to be coated, with a width narrower than the width of the coating roll. The formed paint scraping member is installed below the doctor, the tip of the paint scraping member is brought into contact with the coating roll, and the coating roll and the backup roll are supplied while supplying the paint to the paint reservoir. And rotate to partially scrape the paint adhered to the outer peripheral surface of the coating roll with the paint scraping member. While seeking the By painting the coated plate, painted while making portions unfilled coating a portion of the object to be coated plate.

In this case, the paint scraping member is installed at a position corresponding to the portion where the coating is unnecessary, so that the coating adhered to the outer peripheral surface of the coating roll is coated above the plate to be coated in the portion where the coating is unnecessary. Scrap with a scraping member.
As a result, when the plate to be coated passes between the coating roll and the backup roll, the coating roll will not be coated even if the coating roll comes into contact with the plate to be coated, and only the part that needs to be coated will be coated. It is painted with the paint adhering to the outer peripheral surface of the coating roll.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
A description will be given based on FIG. First, roll coater 11
The overall configuration will be described. The roll coater 11 is located directly below the coating roll 12 and the doctor roll 14 that forms a paint reservoir 13 between the coating roll 12 and the coating roll 12, and the coated plate 6 is provided between the coating roll 12 and the coating roll 6. It is composed of a backup roll 16 that conveys while sandwiching it. The backup roll 16 is provided with a base frame 1 via a rotating shaft 17.
8 is supported horizontally. The coating roll 12 and the doctor roll 14 are horizontally supported by the upper frame 21 via rotating shafts 19 and 20.

The height position of the upper frame 21 is adjusted by a height adjusting bolt 22 mounted upward on the base frame 18, whereby the coating roll 1 is adjusted.
The gap between the 2 and the backup roll 16 is adjusted. The horizontal position of the doctor roll 14 is adjusted by a gap adjusting bolt 23 that is horizontally attached to the upper frame 21, thereby adjusting the gap between the doctor roll 14 and the coating roll 12 to adjust the amount of paint adhered. Adjust.

The paint reservoir 13 formed between the coating roll 12 and the doctor roll 14 is supplied with paint from a paint supply nozzle 24 installed above it. Then, the paint that overflows from the right end of the paint reservoir 13 is received in a paint collecting gutter 25 installed below the paint collecting tank 13 and collected in a paint tank (not shown). The paint in the paint tank is sent to the paint supply nozzle 24 by a paint pump (not shown).

On the other hand, below the doctor roll 14, a blade-shaped paint scraping member 26 having a width narrower than that of the coating roll 12 is installed. The paint scraping member 26 has a support plate portion 26a bent obliquely upward, and an inverted U-shaped hooking portion 27 formed at an upper end portion of the support plate portion 26a is fixed to the upper frame 21. The paint scraping member 26 is detachably and rotatably attached to the support pipe 28 by being hooked on the supported support pipe 28. The paint scraping member 26 is a pressing member 2 biased in the direction of arrow A in FIG. 1 by a spring (not shown) or the like.
It is urged to rotate counterclockwise in FIG. 1 by 9 so that the blade-shaped tip of the paint scraping member 26 is held in contact with the coating roll 12. Then, in order to flow the paint scraped from the outer peripheral surface of the coating roll 12 by the paint scraping member 26 to the paint collecting trough 25, the paint receiving surface of the paint scraping member 26 is inclined downward toward the paint collecting trough 25. Has been done. Before and after the roll coater 11 configured as described above, the roller conveyors 30 that convey the plate 6 to be coated are provided.

Next, a coating method for partially coating the paint (sealer) on the coated plate 6 such as a wooden plate as shown in FIG. 4 using the roll coater 11 having the above-mentioned structure will be described. A paint scraping member 26 is installed at a position corresponding to an unnecessary portion of painting, and the paint between the coating roll 12 and the doctor roll 14 is rotated while the coating roll 12 and the backup roll 16 are rotated by a motor (not shown). The paint is supplied to the reservoir 13 from the paint supply nozzle 24. The paint flows in the paint reservoir 13 in the left-right direction and is evenly spread and attached to the entire outer peripheral surface of the rotating coating roll 12.

While the plate 6 to be coated conveyed by the roller conveyor 30 is positioned by a positioning guide (not shown), the plate 6 to be coated is fed between the coating roll 12 and the backup roll 16, The paint on the outer peripheral surface of the coating roll 12 is applied to the plate 6 to be coated. At this time, for parts that do not require painting,
The paint adhering to the outer peripheral surface of the coating roll 12 is scraped off by the paint scraping member 26 above the plate 6 to be coated.
As a result, when the plate 6 to be coated passes between the coating roll 12 and the backup roll 16, even if the coating roll 12 comes into contact with the plate 6 to be coated, the coating is not performed in a portion where the coating is unnecessary. Only the necessary part is painted with the paint attached to the outer peripheral surface of the coating roll 12,
Partial painting is performed as shown in FIG.

In such a coating method, the paint scraping member 26 is installed at a position corresponding to a portion where the coating is not required, so that the roll coater 11 allows the portion to be coated only on the portion to be coated on the plate 6 to be coated. Can be painted on.
For this reason, it is not necessary to perform the troublesome work of removing the coating film by sanding with a sandpaper or the like after the coating process as in the prior art, and the production efficiency can be improved and the production cost can be reduced.

Further, since the paint scraping member 26 is removable, the paint scraping member 26 may be replaced with one having a different width or its mounting position may be adjusted to adjust the width of the unpainted portion of the plate 6 to be painted. The position can be adjusted and various painting patterns can be dealt with. For example, if the position of the paint scraping member 26 is located at the center portion in the width direction of the plate 6 to be coated, the center portion in the width direction of the plate 6 to be coated is the non-coating portion,
It is also possible to paint on both sides.

The plate 6 to be coated is not limited to a wooden plate, and the above coating method can be applied as long as it is a plate that can be coated, such as a cement type molded plate. Further, the above-mentioned coating method is not limited to sealer coating, and can be applied to any of undercoating, intermediate coating and topcoating.

Further, in this embodiment, means (doctor) for forming the paint reservoir 13 between the coating roll 12 and the coating roll 12.
Although the doctor roll 14 that rotates with the rotation of the coating roll 12 is used as the above, instead of this, a doctor bar that does not rotate is used, and by bringing this doctor bar into contact with the coating roll 12, A paint reservoir may be formed between the coating roll 12 and the coating roll 12.

[0018]

As is apparent from the above description, according to the present invention, the paint scraping member is installed at a position corresponding to a portion where the coating is unnecessary, and the paint adhered to the outer peripheral surface of the coating roll is partially removed. Since the paint is scraped off by the paint scraping member, the roll coater can partially paint only the portion of the plate to be coated which needs to be coated.

[Brief description of drawings]

FIG. 1 is a side view of a roll coater showing an embodiment of the present invention.

FIG. 2 is a front view of the main part of the roll coater.

FIG. 3 is a side view illustrating a conventional roll coater.

4A is a side view of the shelf board, FIG. 4B is a rear view of the shelf board before the folding process, and FIG.

[Explanation of symbols]

6 ... Plate to be coated, 11 ... Roll coater, 12 ... Coating roll, 13 ... Paint reservoir, 14 ... Doctor roll (doctor), 16 ... Backup roll, 24 ... Paint supply nozzle, 22 ... Height adjusting bolt, 23 ... Gap Adjusting bolt,
25 ... Paint collecting gutter, 26 ... Paint scraping member, 29 ... Pressing member.

Claims (2)

[Claims] 1. A coating roll, a doctor for forming a paint reservoir between the coating roll, and a backup roll which is located under the coating roll and which conveys a plate to be coated while sandwiching the plate to be coated between the coating roll and the coating roll. A method of partially coating the plate to be coated using a roll coater having a, wherein a paint scraping member formed in a width narrower than the width of the coating roll is installed below the doctor. , The tip of the paint scraping member is brought into contact with the coating roll, while supplying the paint to the paint reservoir, the coating roll and the backup roll are rotated, and the paint adhered to the outer peripheral surface of the coating roll. Part of the paint by scraping off the paint with the paint scraping member. Coating method, characterized in that the coating while making the portion that is not painted the paint on the part of the. 2. A coating roll, a doctor for forming a paint reservoir between the coating roll, and a backup roll which is located below the coating roll and which conveys a plate to be coated while sandwiching the plate to be coated between the coating roll and the coating roll. And supplying paint to the paint reservoir,
In a roll coater for rotating the coating roll and the backup roll to coat the plate to be coated with the coating material adhered to the outer peripheral surface of the coating roll, the scraping coating formed in a width narrower than the width of the coating roll. A member is detachably installed below the doctor, the tip of the paint scraping member is brought into contact with the coating roll, and the paint adhering to the outer peripheral surface of the coating roll is partially scraped by the paint scraping member. A roll coater, characterized in that by coating the plate to be coated while taking it, a part of the plate to be coated is coated with a portion not coated with paint.