JP2006015219A - Multi-liquid mixing apparatus and multi-liquid mixing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the burden of a worker in relation to a multi-liquid mixing apparatus and a multi-liquid mixing method. <P>SOLUTION: The values of a temperature and humidity in a coating booth are measured by means of sensors 21, 22 and the mixture ratio data corresponding to the measurements by the sensors 21, 22 are read out from a plurality of the mixture ratio data prepared in advance according to the values of the temperature and the humidity, and based on these read-out mixture ratio data, the operation of pumps 13A, 13B and a selector valve 12 is controlled to individually change the amount of a base agent and thinner flowed thereby to obtain a coating material of optimum mixture ratio. Since the worker does not need to visually check the surface of a coating film, the load on the worker is reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multi-liquid mixing apparatus and a multi-liquid mixing method.

  As a method of obtaining a paint by mixing a plurality of liquid agents, mixing a main agent, a curing agent, and a thinner at a predetermined ratio is performed. In this case, when the ratio of the thinner is changed, the finished state of the coating film surface is changed. However, the ratio of the thinner for obtaining the best finish varies depending on the environment in the painting booth.

A technique for mixing a plurality of liquid agents is disclosed in Patent Document 1.
JP 2004-141800 A

Conventionally, the state of the coating film surface is visually confirmed, and an operator appropriately changes the thinner ratio based on the visual recognition information. Therefore, in order to obtain a good finish of the coating film, there is a problem that a high degree of skill is required for the worker, and the burden on the worker is large.
The present invention has been completed based on the above circumstances, and an object thereof is to reduce the burden on the operator.

  As means for achieving the above-mentioned object, the invention of claim 1 is a multi-liquid mixing method for obtaining a paint by mixing a plurality of liquid agents at a predetermined flow rate and mixing them at a predetermined mixing ratio. The sensor measures at least one value of temperature and humidity in the inside, and measures the sensor from a plurality of mixture ratio data created in advance according to the value of at least one of temperature and humidity It is characterized in that the mixture ratio data corresponding to the value is read and the flow rates of the plurality of liquid agents are individually changed based on the read mixture ratio data.

  The invention of claim 2 is a multi-liquid mixing device that obtains a coating material by supplying a plurality of liquid agents at a predetermined flow rate and mixing them at a predetermined mixing ratio, and the flow rate change capable of individually changing the flow rates of the plurality of liquid agents Means, a sensor for measuring at least one of temperature and humidity in the painting booth, and a plurality of mixture ratio data prepared in advance according to at least one of the temperature and humidity Storage means, and control means for reading the mixture ratio data corresponding to the measured value of the sensor from the plurality of mixture ratio data and controlling the flow rate changing means based on the read mixture ratio data. It has features where it is provided.

<Invention of Claims 1 and 2>
Based on the measured value of at least one of temperature and humidity in the coating booth, a plurality of liquid agents are mixed at a preset mixing ratio. The present invention was invented based on the knowledge that the change factor of the mixing ratio of the liquid agent is the temperature and humidity in the coating booth. According to the present invention, the operator visually confirms the coating film surface. Since it is not necessary, the burden on the operator is reduced. In addition, since a suitable mixing ratio can be known before coating, it is possible to prevent the occurrence of defective coating.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The mixing apparatus according to the present embodiment performs coating using a paint obtained by mixing a main agent (liquid agent which is a constituent element of the present invention) and thinner (liquid agent which is a constituent element of the present invention) at a predetermined ratio. The best coating film can be obtained by mixing the main agent and thinner at a suitable mixing ratio according to the environment of the painting booth.

  As shown in FIG. 3, in the main agent supply path 10A between the tank 11A for storing the main agent and the switching valve 12, a pump 13A and a flow meter 14A are provided in order from the upstream side. A pump 13B and a flow meter 14B are also provided in the thinner supply path 10B between the tank 11B for storing the thinner and the switching valve 12 in order from the upstream side. A mixer 15 is connected to the switching valve 12, and a coating gun 16 is connected to the mixer 15. As shown in FIG. 4, the flow rates of the main agent and the thinner measured by the flow meters 14A and 14B are individually input to the mixing ratio controller 20 (flow rate changing means which is a constituent element of the present invention). The pumps 13A and 13B are driven or stopped based on the measured values and the mixture ratio data described later, and the switching valve 12 is switched between a state in which only the main agent passes and a state in which only the thinner passes. By controlling the operations of the pumps 13A and 13B and the switching valve 12 in this way, the supply flow rate of the main agent and thinner to the mixer 15 is adjusted, the main agent and thinner are mixed at a predetermined mixing ratio, and the paint gun is applied as a paint. 16 is supplied.

Next, the mixing apparatus of this embodiment will be described.
A temperature sensor 21 and a humidity sensor 22 are installed at predetermined positions in a painting booth (not shown). The value measured by the temperature sensor 21 is input as a digital value to the processing unit 24 of the computer via the analog-digital converter 23. Similarly, the value measured by the humidity sensor 22 is also input as a digital value to the processing unit 24 of the computer via the analog-digital converter. The storage means 25 of the computer stores a plurality of mixing ratio data representing the mixing ratio of the main agent and the thinner that is optimized according to temperature and humidity. FIG. 2 is a conceptual diagram of a data table composed of a plurality of mixture ratio data. The mixture ratio data read from the storage unit 25 in the processing unit 24 is input to the above-described mixture ratio controller 20. The storage means 25 and the processing unit 24 constitute a data selector 26 that reads out the mixture ratio data corresponding to the measured values of the temperature sensor 21 and the humidity sensor 22 from the plurality of mixture ratio data. Further, the data selector 26 and the mixing ratio controller 20 constitute a control means 27 that is a constituent requirement of the present invention.

Next, the operation of this embodiment will be described.
In the painting booth, temperature and humidity are measured at regular time intervals (for example, every 10 minutes), and the measured values are input to the processing unit 24. The processing unit 24 reads the mixture ratio data corresponding to the input measured values of temperature and humidity, and inputs the mixture ratio data to the mixture ratio controller 20. The mixing ratio controller 20 controls the operations of the pumps 13A and 13B and the switching valve 12 while feeding back the measured values of the flow meters 14A and 14B, whereby the main agent and the thinner are alternately sent to the mixer 15 at a predetermined ratio. It is. By mixing the main agent and thinner with the mixer 15, a paint having a mixing ratio optimum for the temperature and humidity of the painting booth is obtained and supplied to the painting gun 16. Thereby, a suitable coating film is formed on the article to be coated.

  As described above, in the present embodiment, the temperature and humidity values in the painting booth are measured by the sensors 21 and 22, and from among a plurality of mixture ratio data created in advance according to the temperature and humidity values, The mixture ratio data corresponding to the measured values of the sensors 21 and 22 are read out, and the flow rates of the plurality of liquid agents are individually changed based on the read out mixture ratio data. It is designed to be mixed at a suitable mixing ratio. Therefore, it is not necessary for the operator to visually check the surface of the coating film, and the burden on the operator is reduced. In addition, since a suitable mixing ratio can be known before painting, it is possible to prevent the occurrence of defective coating.

<Other embodiments>
The present invention is not limited to the embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) Although the case where two types of liquid agents are mixed has been described in the above embodiment, the present invention can also be applied to a case where three or more types of liquid agents are mixed.
(2) In the above embodiment, the mixing ratio data corresponding to the measured values of both temperature and humidity is created. However, according to the present invention, the mixing ratio data is based on the measured values of only one of temperature and humidity. May be created.

1 is a block diagram of a mixing apparatus according to a first embodiment. Conceptual diagram of data table for mixing ratio data Block diagram showing paint supply path Block diagram of means for controlling the mixing ratio of the liquid agent

Explanation of symbols

20: Mixing ratio controller (flow rate changing means)
DESCRIPTION OF SYMBOLS 21 ... Temperature sensor 22 ... Humidity sensor 25 ... Memory | storage means 27 ... Control means

Claims (2)

It is a multi-liquid mixing method for obtaining a paint by mixing a plurality of liquid agents at a predetermined flow rate and mixing at a predetermined mixing ratio,
Measure at least one of temperature and humidity in the painting booth with a sensor,
Based on the read mixture ratio data, the mixture ratio data corresponding to the measured value of the sensor is read out from a plurality of mixture ratio data prepared in advance according to at least one of temperature and humidity. A multi-liquid mixing method, wherein the flow rates of a plurality of liquid agents are individually changed. A multi-liquid mixing apparatus that obtains a paint by mixing a plurality of liquid agents at a predetermined flow rate and mixing at a predetermined mixing ratio,
A flow rate changing means capable of individually changing the flow rates of a plurality of liquid agents;
A sensor for measuring at least one of temperature and humidity in the painting booth;
Storage means for storing a plurality of mixture ratio data created in advance according to at least one of the temperature and humidity;
A control unit that reads out the mixture ratio data corresponding to the measurement value of the sensor from the plurality of mixture ratio data, and controls the flow rate changing unit based on the read out mixture ratio data. Multi-liquid mixing device.

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