JPH11104549A - Supply of coating material to coating implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the coating defect which occurs as a result of the excessive feeding of a coating material by detecting the number of revolutions of a roller at the time of coating work, determining the required amt. of the coating material needed thus far by calculation and executing the supply of the coating material. SOLUTION: When an operator starts the coating work, the number of revolutions of the roller 1 during the preset time is detected by a revolution sensor 2 mounted at the roller 1. The area coated thus far is determined from the detected number of revolutions and the diameter and width of the roller 1 previously inputted to a memory device and the determined area is multiplied by a target coating film thickness, by which the required amt. of the coating material is determined. The coating material is supplied by opening a valve 3 installed at a coating material supply route 4 until the required amt. of the coating material obtd. by determining a flow rate with a flowmeter 5 is attained. As a result, the coating defect which occurs as a result of the excessive feeding of the coating material is prevented and the work is simplified.

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 coating tool which performs a coating operation using a roller.

[0002]

2. Description of the Related Art Conventionally, when a coating operation is performed using a roller, the roller is immersed in paint and applied, and then immersed and applied repeatedly. Further, the pressure feed roller had a function of feeding the paint by a pump and supplying the paint to the roller by pulling a lever.

[0003]

In the above-described coating tool, in the case of a roller, since the roller must be immersed in paint and applied, and then applied repeatedly, the operation is inefficient and continuous. Had the drawback that painting was not possible. Also,
The pressure feed roller has a drawback in that it is difficult to adjust the amount of paint supplied to the roller, so that more paint than necessary is supplied, and coating defects such as sagging and dropping are likely to occur.

[0004]

According to the present invention, in order to solve the above-mentioned drawbacks, a rotation sensor is attached to a rotation shaft of a roller, and the number of rotations of the roller at the time of coating operation is detected. The required amount of paint is calculated from the width and the target film thickness, and the paint is supplied to the roller by the required amount calculated by opening and closing the flow meter and the valve.

[0005]

During the coating operation, the rotation or angular velocity or angular acceleration of the roller is detected by a sensor attached to the rotating shaft, and the number of rotations of the roller during a preset time is determined. The required amount of paint is calculated from the number of revolutions, the diameter and width of the roller, and the target coating film thickness, and the required amount of paint is supplied by opening and closing a flow meter and a valve provided in the paint supply path.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration example of a coating tool according to the present invention. The roller 1 is provided with a rotation sensor 2 for detecting rotation or angular velocity or angular acceleration on a rotation axis of the roller. Then, the paint is supplied to the roller 1 from the paint supply path 4 by the pump 6. In addition, a valve 3 and a flow meter 5 are installed in the paint supply path 4, and supply paint based on a control method described below.

First, when starting painting, an operator turns on a pump (not shown).
Then, when the worker starts the painting operation, the rotation sensor 2 attached to the roller detects the number n of rotations of the roller during a preset time t.

[0008] Then, from the detected rotation speed n and the diameter d and width w of the roller previously input to the storage device, the area S that has been coated so far is determined. The required amount V of paint is obtained by multiplying by the thickness δ. The formula for calculating the required amount V is as follows. V = S × δ: S = π ×
d × w × n (π is pi)

Then, the valve 3 provided in the paint supply path 4 is opened by the flow meter 5 to supply the paint until the flow rate reaches the required required amount V of the paint. The above paint supply is repeated during the painting operation.

FIG. 2 shows a block diagram of the control of the supply of the paint. In advance, the roller diameter d and width w and the target coating thickness δ
And the detection time t of the rotation speed are input from the input device and stored in the storage device.

When the painting operation is started, the number of rotations n of the roller is detected by the rotation sensor at every detection time t and transmitted to the arithmetic processing unit.

The arithmetic processing unit calculates the required amount V of paint during the detection time t with reference to the diameter d and width w of the roller and the target coating thickness δ stored in the storage device. The calculated required amount V of paint is transmitted to the control device for opening and closing the valve, and a control signal is sent to the valve to open the valve. When the valve is opened, the flow rate of the paint is transmitted from the flow meter to the control device for opening and closing the valve. When the flow rate of the paint reaches the required amount V of the paint, a control signal is sent to the valve and the valve is closed.

In this way, the number of rotations n of the roller when the worker performs the painting operation is detected by the rotation, angular velocity or angular acceleration, and the required amount V is calculated from the roller diameter d and width w and the target coating thickness δ. Is calculated and the required amount V of paint is supplied by opening and closing the flow meter and the valve.

[0014]

According to the present invention, during the painting operation, the number of rotations of the roller is detected, the required amount of the paint required up to that time is calculated and obtained, and the paint is supplied. Proper keeping can be done automatically. This makes it possible to prevent a coating defect caused by excessive feeding of the coating material, and at the same time, it is not necessary for the operator to adjust the supply amount of the coating material, which has been required so far, thereby simplifying the work.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a coating tool.

FIG. 2 is a block diagram of control.

[Explanation of symbols]

1: roller, 2: rotation sensor, 3: valve, 4: paint supply path, 5: flow meter, 6: pump

Claims (1)

[Claims] 1. A method for detecting the number of rotations of a roller, calculating a required amount of paint from the detected number of rotations, a roller diameter and a width, and a target coating film thickness, and transmitting the determined required amount of paint to a paint supply path. A method for supplying paint to the coating equipment supplied by opening and closing the provided flow meter and valve.