JPH0653241B2 - Roll coater and coating method using the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roll coater for coating a wall material as a ceramic base material for construction and a coating method using the roll coater.

[Conventional technology]

Conventionally, there are roll coater, flow coater, spray, screen printing, etc. as a means for applying a paint to the surface of a wall material as a ceramic-based building base material. It is a uniform coating. Further, although it is possible to partially paint in screen printing, for example, in the case of separately coating two colors of paint, if the second color is applied after the first color is applied and the coated part is not dried, The coating material of the first time adheres and damages the coated surface, which causes inconvenience in the coating finish.

On the other hand, eliminating the conventional installation of tiles, bricks, etc. one by one,
Regarding a method for producing a random sticking decorative plate which eliminates the above-mentioned drawbacks by forming grid-like unevenness on one substrate and applying paints of various color to these uneven surfaces, It is known from Japanese Patent Application No. 60-190565 proposed by the applicant.

[Problems to be solved by the invention]

However, the above-mentioned proposal by the applicant uses an endless belt as a coating means for an object to be coated, and the paint is supplied and adhered to the endless belt through a doctor roll, which is continuous. When the coating is not applied, the coating remains on the belt, and as a result, it is difficult to keep the viscosity of the coating, which is important during coating, constant.

The present invention eliminates the above-mentioned inconvenience, and when a plurality of types of coating materials are continuously applied to arbitrary positions, a coating material drying step between each coloring step is not necessary, and smooth coating without stagnation of coating material is possible. An object is to provide a coater and a coating method using this roll coater.

[Means for solving problems]

As is generally known, a roll coater is composed of one coater roll, one backup roll and one doctor roll, and the roll length is set longer than the width of the substrate to be coated. It is possible to uniformly coat the entire surface of the base material. On the other hand, if you want to paint partially, you can shorten the length of the coater roll,
Supply and circulation of paint becomes difficult. In order to solve these problems, the present invention provides a coater roll that is rotatably supported separately from a base material, a doctor roll that is rotatably supported by contacting the coater roll, and a base material. It is composed of a plurality of small coater rolls arranged so as to come into contact with the coater rolls, and driving means for connecting and disconnecting the small coater rolls individually according to the coating range of the base material is connected to each small coater roll. Regarding the coating method, a plurality of units of the roll coater are arranged side by side in the conveying direction of the base material, and different or different color paints are supplied to at least two units and are randomly applied on the surface of the base material. It is intended to carry out toning painting.

〔Example〕

FIG. 1 is a schematic side view showing a part of a roll coater according to an embodiment of the present invention with a part cut away, and FIG. 2 is a schematic perspective view of the embodiment of the roll coater, where 1 is a coater roll. 2 is a doctor roll in which the shaft center is arranged in parallel with the coater roll 1 and the peripheral surfaces are in contact with each other, as in the case of a conventional general roll, and 3 is the upper part of both rolls 1 and 2. A nozzle for supplying the paint 4. Reference numeral 5 denotes a base material, which is provided so as to be conveyed in the direction of the arrow A and has a plurality of backup rolls 6-1 axially supported at appropriate intervals,
It is supported by 6-2, 6-3 .... Reference numeral 7 is a small coater roll arranged so as to contact the base material 5 and the coater roll 1, and has a length corresponding to one width of the lattice provided on the base material 5. The small coater roll 7 has the following driving means. That is, the rotary support shaft 8 of the small coater roll 7 is supported at its both ends by the support rods 9, and the slide bar 10 is provided at the center thereof.
Extend in a right angle direction and are slidably inserted into the support base 11. The support base 11 is a bearing 1 fixed to the machine frame.
A rotating arm 14 that is rotatably supported by the shaft 2 via a shaft 13.
Is fixed to the tip end of the small coater roll 7 by screwing, and is urged by a tension spring 15 supported by the machine frame to bring the peripheral surface of the small coater roll 7 into close contact with the coater roll 1.
A tension spring 16 is fitted on the slide bar 10 between the support rod 9 and the support 11, and one end of the tension spring 16 is connected to a movable piece 18 of an electromagnet 17 screwed to the rotating arm 14.

The configuration of this embodiment has been described above. Next, the operation will be described.

In this embodiment, the base material 5 to be applied is provided with grid-like grooves 19 called joints, and a flat convex portion 20 is formed from this. A plurality of small coater rolls 7 are provided corresponding to one width of the groove 19. Here, although the paint supplied from the nozzle 3 is not shown, the paint 4 overflowed from both ends is recovered and supplied again from the nozzle 3 among the paints 4 supplied by a circulation recovery structure using a commonly used pump. And the supplied paint 4 is the doctor roll 2
By setting the interval of, a constant amount is always adhered to the peripheral surface of the coater roll 1, and the adhered paint 4 is transferred to the small coater roll 7 which is always in contact. At this time, the coating material 4 is in a circulating state, and therefore always stands by in the same viscosity state. Then, in response to the random sticking pattern of the base material 5, when an input signal is sent into the electromagnet, the movable piece 18 operates in the B direction, so that the small coater roll 7 contacts the convex portion 20 of the base material 5. At the same time, the paint 4 is transferred to the convex portion 20. For example, if the conveying speed of the brick-like base material 5 is 10 m / min, and the groove width is 1 cm, the time taken for this portion to pass is (1 cm / 1000 cm) × 60 seconds = 0.06 seconds,
The small coater roll must respond instantly. Therefore, the small coater roll cannot be controlled unless it is light. In this way, the small coater roll 7 can be freely brought into contact with the substrate 5 at any position by energizing the electromagnet 17.

As a result, the section coating can be performed only on the portion of the convex portion of the base material 5 that needs to be coated. In addition, if an uneven pattern is formed on the surface of the small coater roll 7, the coating material attached to the convex portion is transferred to the convex portion 20 on the base material 5. As a result, it is possible to obtain a decorative plate to which a novel pattern is added as compared with the usual painting with a flat roll.

In order to perform the random sticking-like coating using the roll coater described above, the roll coater unit as in the above embodiment is
Two or more units may be continuously arranged in the conveying direction of the base material, at least two units may be supplied with different or differently colored coating greens, and the convex portions of the base material may be coated with differently or differently colored coating materials. That is, all units except the combination of supplying the same type or the same color paint to all the units are included. And more preferably, if sand is sprinkled on the applied paint while it is still dry, the sand is fixed to the substrate by the paint, and a more natural brick tile-like decorative board can be obtained.

〔The invention's effect〕

According to the roll coater of the present invention, when a plurality of types of coating materials are partially coated on a base material, the coating material can always stand by while maintaining a constant viscosity, so that partial coating with a constant coating surface quality can be performed. By performing the coating method using this roll coater while being obtained, it is possible to efficiently manufacture a random sticking tone decorative sheet having two or more colors and appearances.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a roll coater according to an embodiment of the present invention with a part cut away, and FIG. 2 is a schematic perspective view of the embodiment. Explanation of symbols 1 ... Coater roll, 2 ... Doctor roll 5 ... Substrate, 7 ... Small coater roll

Claims (2)

[Claims] 1. A coater roll (1) which is rotatably supported by a substrate apart from a base material (5), and the coater roll (1).
Doctor roll (2) that is rotatably supported by contact with the roller
And a plurality of small coater rolls (7) arranged so as to be in contact with the base material (5) and the coater roll (1). A call coater characterized in that a driving means for performing the above is connected to each small coater roll (7). 2. A plurality of roll coaters according to claim (1) are arranged side by side in the conveying direction of a substrate (5), and different or different color paints are supplied to at least two units. A coating method, characterized in that the surface of the base material (5) is randomly coated.