JPH1110040A - Method and apparatus for producing plate-like material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a desired pattern without generating unintended nonuniformity in concentration or coating even when carry speed fluctuates by jetting paint from a paint jet nozzle corresponding to the relative moving amounts of the paint jet nozzle and a planar material. SOLUTION: The quantity of paint to be jetted out of a paint jet nozzle 3 is controlled by a pump 4. The pump 4 is controlled by a controller 5. Besides, the pump 4 is connected to a paint tank 11. Further, the quantity of paint to be jetted out is set to the controller 5 by an increase/decrease pattern generator 7. In this case, the setting unit of the paint jet quantity is set per unit pulse such as gram/pulse. This pulse is generated from a pulse corresponding to the moving amount of a conveyer 1 of a rotary encoder 6 attached to the conveyer 1. Therefore, the paint jet quantity is set per unit pulse, namely, is set per unit moving amount of a planar material 2 on the conveyer 1. Thus, even when the conveyer carry speed changes, desired paint coating can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a plate-like material having a pattern on its surface by coating the plate-like material with one or a plurality of paint jetting nozzles.

[0002]

2. Description of the Related Art Various types of coatings are applied to building materials used as exterior and interior wall materials for buildings in order to improve their commercial value such as design and weather resistance. Has irregularities on the surface.

A coating method for coating a building material having an uneven surface will be described. First, a plurality of paint spray nozzles are arranged in parallel in the width direction of a conveyed building material in a non-contact manner with the building material, and the amount of spray from the paint spray nozzle is reduced. The paint is ejected to the building material by controlling for each paint ejection nozzle.

The ejection amount from the paint ejection nozzle is performed according to a pattern stored in advance, and the ejection timing is such that the ejection starts when the moving amount of the conveyor reaches a set number of pulses pulsed by a rotary encoder. With such a configuration, a desired coating is applied.

[0005]

However, in the above-mentioned coating method, there is a problem that if the conveying speed of the conveyor becomes uneven after reaching the set pulse number, the coating will be uneven. Was. For example, when the amount of paint ejected is constant, the coating amount per unit area of the plate-like material increases when the transport speed is slow, but conversely, when the transport speed is high, the coating amount per unit area of the plate-like material is It is less. When the transport speed fluctuates in this manner, the coating amount becomes different from the desired coating amount.

[0006] This means that there is a problem that unintended shading unevenness and coating unevenness occur and a desired pattern cannot be obtained. The present invention overcomes these problems, and does not cause unintended density unevenness or coating unevenness even when the transport speed fluctuates, and a method for manufacturing a plate-shaped material having a pattern on a surface capable of obtaining a desired pattern and It is an object to provide a manufacturing apparatus.

[0007]

[Means for Solving the Problems]

(1) One or more paint ejection nozzles or plate-like materials are moved, and paint is sprayed from the paint ejection nozzles onto the plate-like material while controlling the amount of paint ejection to form a plate-like material having a pattern on the surface. A method of manufacturing a plate-like material, wherein a paint is ejected from the paint ejection nozzle according to a relative movement amount between the paint ejection nozzle and the plate-like material.

(2) The method for manufacturing a plate-like material according to the method (1), wherein the plate-like material is a building board or a fabric.

(3) The method for producing a plate-like material according to the above (1) or (2), wherein the injection nozzle is an air spray nozzle and / or an airless spray nozzle.

(4) In the manufacturing method according to any one of the above (1) to (3), the means for controlling the paint ejection amount is based on paint ejection pressure and / or valve opening / closing control or pump discharge amount control. A method for producing a plate-shaped material, characterized in that:

(5) One or more paint ejecting nozzles or plate-like materials are moved, and paint is ejected from the paint ejecting nozzles to the plate-like material while controlling the amount of paint ejected, thereby providing a plate having a pattern on the surface. In an apparatus for manufacturing a shape material, a means for detecting a relative movement amount between the paint ejection nozzle and the plate material is provided,
An apparatus for manufacturing a plate-shaped material, wherein a paint is ejected from the paint ejection nozzle in accordance with the detection result of the relative movement amount.

(6) A building board coated by the manufacturing method or the manufacturing apparatus according to any one of the above (1) to (5).

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, one or more paint ejection nozzles and a plate-like material are relatively moved by a conveying means such as a conveyor, and either one of the paint ejection nozzle or the plate-like material is moved. Or both may be moved.

It is preferable that the paint ejection nozzle is an air spray nozzle, an airless spray nozzle, or a combination thereof. However, the present invention is not limited to these nozzles, and may be any paint ejection nozzle.

As the air spray nozzle, for example, a nozzle having a double structure, in which a paint is passed through an inner pipe and air for atomization is passed through an outer pipe, or the like can be used. With such a structure, the particle size of the atomized droplets can be changed by changing the supply pressure of the air for atomization, so that a paint with higher design quality can be obtained.

Also, as an airless spray nozzle,
For example, a nozzle having a rectangular structure can be used. Such a structure has the advantage that paint clogging is less likely to occur because the corners are at right angles compared to the elliptical shape.

As a combination of an air spray nozzle and an airless spray nozzle, for example, at least two or more injection nozzles are arranged in a plurality in a row at intervals in the transport direction, and the first row is an airless spray nozzle. It is preferable to use a combination such as an air spray nozzle.

It is preferable that the means for controlling the paint ejection amount is based on paint ejection pressure and / or valve opening / closing control or pump discharge amount control. However, the present invention is not limited to these paint ejection control means, and any paint ejection amount may be used as the control means.

As the liquid sending means used for controlling the injection amount of the air spray nozzle, a pump is specifically preferable, and particularly a means having a precise and excellent measuring property such as a syringe pump, a gear pump, a roller pump, etc. Is preferred. Since the liquid sending means typified by the pump has few mechanically deteriorated parts, it can operate stably for a long time compared to the ejection amount control means using an electromagnetic opening / closing valve, etc., and extends the maintenance management interval. be able to.
Moreover, since it has a precise weighing function, it is possible to control the supply amount with high accuracy.

On the other hand, as a liquid sending means used for controlling the injection amount of the airless spray nozzle, it is necessary to apply a high pressure to the paint and to spray the paint. It is preferred to use the resulting pump. The injection amount can be adjusted by controlling the area of the nozzle orifice and the paint ejection pressure applied to the paint and / or the opening and closing of the valve.

According to the present invention, one or more spray nozzles or plate-like materials are relatively moved by a conveying means such as a conveyor,
In the method of coating the plate-like material while controlling the amount of paint ejected from the ejection nozzle, the amount of paint ejected from the ejection nozzle is set per unit relative movement amount.

The unit relative movement amount can be obtained by, for example, the unit movement amount of the conveyor by a rotary encoder. Further, the rotary encoder may not directly detect the moving amount of the conveyor, but may directly detect the moving amount of the nozzle or the plate material.

The injection nozzle used in the present invention may have a structure in which the mounting position is fixed, but each of them may move up and down, right and left, back and forth independently or in conjunction with each other, or It may be configured to swing in the direction.

The plate material of the present invention is a building material such as an outer wall material, an inner wall material, an outer layer material, and an interior material made of wood, stone, metal, cement, ceramic, etc. Is preferred, but non-rigid fabrics, films,
The present invention can also be applied to general industrial materials such as side and top surfaces of an automobile container.

Next, an embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a schematic view showing one embodiment of a plate-like material manufacturing apparatus according to the present invention.

In FIG. 1, reference numeral 1 denotes a conveyor, on which a plate-shaped material 2 is stacked, and which is conveyed so that the plate-shaped material 3 passes below a paint jet nozzle 3.

The amount of paint sprayed from the paint spray nozzle 3 is adjusted by the pump 4. The control of the pump 4 is performed by the controller 5. The pump 4 is connected to the paint tank 11. Further, the setting of the paint ejection amount to the controller 5 is set by the adjustment pattern generator 7. The setting unit of the paint ejection amount is set per unit pulse such as gram / pulse or μl / pulse.

In this embodiment, the respective setting ranges are set as follows.

Conveyor moving speed V = 10 to 40 m / min Movement amount per pulse D = 1 mm / pulse Set paint ejection amount per pulse Q = 0.01 to 1 μl
/ Pulse Q is equivalent to the paint ejection amount per unit movement amount.

For example, if D is set to 1 mm / pulse and V is set to 20 m / min and Q is set to 0.5 μl / pulse, the paint ejection speed Qv per minute to the conveyed plate-like material is as follows. Qv = 0.5 × 20 × 1000 × 1 = 10000 μl /
min. The pulse rate is as follows: 20 m / min = 20,000 mm / min = 20,000
From the pulse / min, it is 20000/60 = 333.33 Hz. The pulse rate automatically changes according to the conveyor speed.

Assuming that the spray width of the paint is 1 m, the paint adhesion amount per square meter is 10,000 / (20 × 1) = 500 μl / square m.

This means that D = 1 mm / pulse,
In the setting of V = 20 m / min, the paint ejection amount is Q
= 0.5 μl / pulse, Qv = 10000
Even if it is set to μl / min, the paint adhesion amount per unit area is 500 μl / square m.

Here, the case where the paint ejection amount is set as Q = 0.5 μl / pulse is referred to as Case 1, and Qv = 1000.
Case 2 is set as 0 μl / min.

Next, if the transport speed V is changed to 10
m / min.

In case 1, the pulse rate is automatically halved, so that Qv automatically becomes: Qv = 0.5 × 10 × 1000 × 1 = 5000 μl / m
in and halved. Therefore, assuming that the ejection width of the paint is 1 m, the paint adhesion amount per square meter is 5000 / (10 × 1) = 500 μl / square m, which is not changed. That is, even if the conveyor speed is disturbed, the amount of paint applied per unit area does not change, and a desired paint film thickness can be maintained.

However, in case 2, when the conveyor speed fluctuates, if the set Qv is kept constant, the amount of paint adhesion per unit area changes as 10,000 / (10 × 1) = 1000 μl / square m. The desired coating film thickness cannot be maintained.

As described above, by setting the amount of paint sprayed per unit movement amount according to the present invention, a desired paint film can be obtained even if the conveyor conveyance speed changes.

The pulse is generated from a pulse corresponding to the amount of movement of the conveyor of the rotary encoder 6 attached to the conveyor 1. Therefore, the setting of the paint ejection amount is set per unit pulse, that is, set per unit movement amount of the plate-shaped material on the conveyor 1.

The timing of starting paint ejection can be determined based on a signal from a plate material detector (not shown) or the like.

In this embodiment, the rotary encoder 6
Is attached to the conveyor, but a method may be used in which the plate is brought into direct contact with the plate to directly pulse the movement of the plate. In this case, one rotary encoder is provided immediately below the paint jetting nozzle 3, that is, around 8 in FIG. 1, or the inlet and outlet of the paint jetting nozzle, ie, FIG.
This is possible by installing two rotary encoders around 9 and 10.

[0042]

According to the present invention described above, even if the transport speed of the plate-like material changes, the coating can be performed stably without the occurrence of unintended shading and coating unevenness. In addition, a conveyor with high transport speed is not required. Further, since the transport speed may be varied, even if the coating is performed at the time of acceleration / deceleration at the start / stop of the conveyor, unintended shading unevenness and coating unevenness do not occur, so that the plate material can be efficiently transported.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a plate-like material manufacturing apparatus according to the present invention.

[Explanation of symbols]

 1: Conveyor 2: Plate material 3: Paint ejection nozzle 4: Pump 4 5: Controller 6: Rotary encoder 7: Adjustable pattern generator 8, 9, 10: Rotary encoder mounting position 11: Paint tank

Claims (6)

[Claims] 1. A plate-like material having a pattern on its surface by moving one or more paint ejection nozzles or plate-like materials and spraying paint from the paint ejection nozzles onto the plate-like material while controlling the amount of paint ejection. A method of manufacturing a plate-like material, wherein a paint is ejected from the paint ejection nozzle in accordance with a relative movement amount between the paint ejection nozzle and the plate-like material. 2. The method according to claim 1, wherein the plate is a building board or a fabric. 3. The method according to claim 1, wherein the spray nozzle is an air spray nozzle and / or an airless spray nozzle. 4. A method according to claim 1, wherein the means for controlling the paint ejection amount is based on paint ejection pressure and / or valve opening / closing control or pump discharge amount control. A method for producing a plate-shaped material characterized by the following. 5. A plate-like material having a pattern on its surface by moving one or more paint ejection nozzles or plate-like materials and spraying paint from the paint ejection nozzles onto the plate-like material while controlling the amount of paint ejection. In the apparatus for manufacturing a material, a means for detecting a relative movement amount between the paint ejection nozzle and the plate-shaped material is provided, and the paint is ejected from the paint ejection nozzle in accordance with the detection result of the relative movement amount. An apparatus for manufacturing a plate-shaped material. 6. A building board coated by the manufacturing method or the manufacturing apparatus according to claim 1.