KR20160033972A - Paint spraying appratus to form a uniform film thickness - Google Patents

Paint spraying appratus to form a uniform film thickness Download PDF

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Publication number
KR20160033972A
KR20160033972A KR1020140124888A KR20140124888A KR20160033972A KR 20160033972 A KR20160033972 A KR 20160033972A KR 1020140124888 A KR1020140124888 A KR 1020140124888A KR 20140124888 A KR20140124888 A KR 20140124888A KR 20160033972 A KR20160033972 A KR 20160033972A
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KR
South Korea
Prior art keywords
paint
distance
flow rate
film thickness
measuring unit
Prior art date
Application number
KR1020140124888A
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Korean (ko)
Inventor
김진억
한명수
천제일
Original Assignee
대우조선해양 주식회사
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Priority to KR1020140124888A priority Critical patent/KR20160033972A/en
Publication of KR20160033972A publication Critical patent/KR20160033972A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means

Abstract

The present invention relates to a paint spraying device capable of forming a uniform film thickness which comprises: a distance measuring unit configured to measure a distance to a surface to be painted; a speed measuring unit configured to measure a moving speed of the paint spraying device; a database configured to store film thickness data formed in accordance with viscosity of paint, the distance to the surface to be painted, and the moving speed of the paint spraying device; and a control unit configured to operate and control the amount of leaked flowing paint by referring to the data stored in the database based on the distance and the moving speed. Even though painting is performed based on an existing work pattern, the same film thickness is formed in accordance with a painting frequency of paint so as to reduce work difficulty and prevent an excessive film, thereby reducing costs of a paint material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint spraying apparatus capable of forming a uniform film thickness,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint spraying apparatus capable of forming a coating film having a uniform thickness and, more particularly, to a paint spraying apparatus for controlling a discharge flow rate of a paint in accordance with a distance between a surface to be coated and a conveyance speed of the paint spraying apparatus.

In general, when a coating operation is performed in the process of drying a vessel or an offshore structure, a spray coating apparatus for spraying the paint in the form of high-pressure air is used in order to increase the work efficiency because the application area is very large.

For example, Patent Document 1 below discloses a technique of spray painting equipment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a conventional spray coating apparatus.

As shown in Fig. 1, the spray coating apparatus 1 uses the pump 2 to atomize the spray gun 4 with the paint stored in the paint storage unit 3 and the high-pressure air sucked in Spraying.

On the other hand, the spray painting apparatus 1 uses a diluent such as a thinner as a cleaning agent after the spraying operation to remove the remaining paint (not shown) inside the pump 2, the suction hose 5, the paint hose 6, Clean the paint.

The spray gun sprayed paint using compressed air to uniformly coat the surface of the coated surface. The position and posture of the spray gun on the coated surface directly affect the quality of the coating.

Particularly, in the case of painting by an operator rather than an automatic machine, it is very difficult to maintain a proper distance between the spray gun and the surface to be coated. If the spray distance is too long with respect to the coated surface, there is a problem that the amount of the paint reaching the coated surface is small and a problem occurs. If the spray distance is too close, the paint flows down onto the coated surface.

On the other hand, the following patent document 2 discloses a spray gun configuration for sensing distance and inclination.

Patent Document 2 discloses a distance measuring sensor mounted on a spray gun and measuring a distance between the spray gun and the object; A tilt measuring sensor mounted on the spray gun for measuring a tilt of the spray gun; An audiovisual alarm means mounted on the spray gun for providing an audiovisual signal to an operator; A microcomputer for receiving the signals of the distance measurement sensor and the tilt measurement sensor and driving the audiovisual alarm means; And an energy supplying means for supplying electric power to the microcomputer, the distance measuring sensor, the tilt measuring sensor and the audiovisual alarming means.

The painting spray gun has a configuration including an alarm means for distance and inclination. Such a configuration is a technique capable of only a certain distance, so that there is a problem that the paint reaching the coated surface becomes smaller or the paint flows down to the coated surface as the distance increases or decreases. Further, there is a problem in that the injection pressure and the discharge flow rate are not controlled depending on the moving speed of the spray gun.

Korean Patent Publication No. 10-2009-0084104 (published on Aug. 05, 2009) Korean Patent Publication No. 10-2008-0046756 (published on May 28, 2008)

SUMMARY OF THE INVENTION An object of the present invention is to provide a paint spraying apparatus capable of forming a uniform paint film thickness without being influenced by a spray pattern of a worker and a work environment.

It is another object of the present invention to provide a paint spraying apparatus capable of preventing a transitional film and preventing a coating film from becoming defective by controlling the discharge flow rate of the paint by recognizing the distance and the conveying speed from the surface to be coated in real time.

According to an aspect of the present invention, there is provided a paint sprayer capable of forming a uniform film thickness, including: a distance measuring unit for measuring a distance to a surface to be coated; A speed measuring unit for measuring a moving speed of the paint sprayer; A database for storing paint film thickness data formed in accordance with the viscosity of the paint, the distance from the paint surface, and the feed speed of the paint sprayer; And a controller for calculating and controlling the flow rate of the paint flowing out by referring to the data stored in the database based on the distance and the transfer speed.

And an on / off control unit for turning off the paint spraying apparatus when the distance measured by the distance measuring unit is out of a predetermined reference range.

And the on / off control unit turns off the paint spraying apparatus when the distance is less than 200 mm.

And the on / off control unit turns off the paint spraying apparatus when the distance exceeds 1000 mm.

Wherein the control unit controls the discharge flow rate of the paint to increase as the distance measured by the distance measurement unit increases.

Wherein the control unit controls the discharge flow rate of the paint to increase as the conveyance speed measured by the velocity measurement unit increases.

Wherein the control unit includes: a flow rate calculator for calculating a discharge flow rate of the paint by referring to the database based on the distance measured by the distance measuring unit and the feed rate measured by the speed measuring unit; And a flow rate controller for controlling the flow rate of the paint supplied to the paint sprayer in real time according to the calculated value.

The paint spraying apparatus may further include a paint film thickness setting unit for inputting a thickness of the paint film to be formed on the painted surface.

And the distance measuring unit is installed at the front end of the paint sprayer.

The speed measuring unit may include a motion sensor.

As described above, according to the paint spraying apparatus of the present invention, since the same film thickness is always applied according to the number of times of application of the paint even if the paint is applied according to the existing work pattern, the work difficulty is reduced and the transitional film is prevented in advance, The cost can be reduced.

Further, according to the paint spraying apparatus of the present invention, it is possible to prevent premature failure of the coating film and to improve the paint quality.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a coating apparatus according to the prior art,
2 is a block diagram of a paint sprayer according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a paint sprayer capable of forming a uniform film thickness according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a paint sprayer capable of forming a uniform film thickness according to a preferred embodiment of the present invention.

2, the paint spraying apparatus includes a film thickness setting unit 10, a distance measuring unit 20, an on / off control unit 30, a velocity measuring unit 40, a database 50, And a control unit (60).

The film thickness setting unit 10 is an input unit for inputting a desired film thickness per application. The operator can set the desired film thickness through the film thickness setting section.

The distance measuring unit 20 includes a distance measuring sensor such as an ultrasonic sensor for measuring the distance between the surface to be painted (paint spraying surface) and the graphic spraying apparatus in real time. There is no restriction on the position to be installed, but it is preferable to be provided at the front end of the paint sprayer.

The on / off control unit 30 receives distance data measured by the distance measuring unit 10 and turns off the paint spraying apparatus when the value is out of a predetermined range. For example, when the distance between the surface to be coated and the paint sprayer is less than 200 mm, it is preferable to turn off the paint sprayer. If the separation distance is less than 200 mm, the amount of paint sprayed onto the spray is so low in the paint sprayer that it can not form a fully developed spray pattern while passing through the tip nozzle (not shown) of the paint sprayer, It is not smooth. A fully developed spray pattern refers to a pattern converged at the maximum spray angle of the spray tip nozzle. In order for the maximum spray angle to be formed, the flow rate and pressure must exceed a certain value depending on the size of the tip needle. That is, a constant flow rate and pressure must be accompanied by a maximum spray angle, which makes the coating surface flat and smooth.

On the contrary, it is preferable to turn off the paint spraying apparatus even when the distance between the surface to be coated and the paint spraying apparatus exceeds 1000 mm. If the spacing is too wide, the amount of paint sprayed will increase excessively and may exceed the maximum pressure setting range of the paint pump. When the spray pressure exceeds the maximum pressure setting range of the sprayer pump, the amount of spray dust (droplets that are not adhered to the surface of the workpiece and scattered) is not adhered and the amount of discharge is rapidly increased. .

The speed measuring unit 40 measures the conveying speed of the paint spraying apparatus. A worker performing a spraying operation grasps a paint spraying apparatus (commonly called a spray gun) and performs painting work while moving the paint spraying apparatus horizontally and vertically. The speed measuring section measures a speed at which the paint spraying apparatus moves, that is, . It is preferable to include a motion sensing sensor such as a motion sensor. The motion sensor may be attached to the body of the paint sprayer.

The database 50 stores paint film thickness data formed in accordance with the viscosity of paint, the distance between the coated surface and the paint sprayer, and the transfer speed of the paint sprayer. The discharge flow rate of the paint must be changed according to the viscosity, the separation distance, and the feed rate of the paint, so that data on these values is stored.

If the distance between the surface to be coated and the paint spraying device is increased or the transfer rate of the paint spraying device is increased, the flow rate of the paint to be discharged must be increased to maintain a constant film thickness even if the viscosity of the paint is the same. The paint flow rate values for these two cases are empirically measured and databaseed according to the viscosity ranges of various paints as shown in the following example.

Table 1 shows one embodiment of the data stored in the database 50.

Figure pat00001

As shown in Table 1, the database of each formed coating thickness is fitted in three dimensions for each case and established as an experimental relation.

The control unit 60 calculates the discharge flow rate of the paint by referring to the data stored in the database 50 on the basis of the separation distance and the feed rate and controls the flow rate of the supplied paint according to the calculated value. 1, the paint sprayer 4 is connected to the paint reservoir 3 through a pump 2. [ The pump, and the painting material storage unit is a general construction and can be easily understood by those skilled in the art, so a detailed description thereof will be omitted.

The control unit 60 includes a flow rate calculation unit 62 for calculating the discharge flow rate of the paint with reference to the database 50 according to the distance from the surface to be coated and the conveyance speed of the paint spraying apparatus, And a flow controller 64 for real-time control according to the calculated value. The flow rate calculator 62 calculates the discharge flow rate of the paint based on the database according to various conditions such as the film thickness set by the operator, the distance from the real time sensed surface, and the feed rate of the paint sprayer, The flow rate of the paint supplied to the paint spraying device is controlled in real time according to the calculated value.

That is, when the worker inputs the reference coating film thickness and the viscosity of the construction paint and starts work, the distance measuring unit 20 and the velocity measuring unit 40 sense the distance and the feed rate, Calculates a flow rate value, and controls the paint to be discharged in accordance with the calculated value.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as falling within the scope of the present invention.

10: Film thickness setting section 20: Distance measuring section
30: on / off control unit 40: speed measuring unit
50: Database 60:
62: Flow rate value calculation unit 64: Flow rate control unit

Claims (10)

A distance measuring unit for measuring a distance to a surface to be coated;
A speed measuring unit for measuring a moving speed of the paint sprayer;
A database for storing paint film thickness data formed in accordance with the viscosity of the paint, the distance from the paint surface, and the feed speed of the paint sprayer;
And a control unit for calculating and controlling a flow rate of the paint discharged by referring to the data stored in the database based on the distance and the transfer speed. The method according to claim 1,
Further comprising an on / off control unit for turning off the paint spraying apparatus when the distance measured by the distance measuring unit is out of a preset reference range. 3. The apparatus of claim 2, wherein the on /
And when the distance is less than 200 mm, the paint spraying apparatus is turned off. 3. The apparatus of claim 2, wherein the on /
And when the distance exceeds 1000 mm, the paint spraying apparatus is turned off. The apparatus of claim 1, wherein the control unit
And controlling the discharge flow rate of the paint to increase as the distance measured by the distance measuring unit increases. The apparatus of claim 1, wherein the control unit
Wherein the controller controls the flow rate of the paint to increase as the conveyance velocity measured by the velocity measuring unit increases. The apparatus of claim 1, wherein the control unit
A flow rate calculation unit for calculating a discharge flow rate of the paint with reference to the database based on the distance measured by the distance measurement unit and the feed rate measured by the velocity measurement unit; And
And a flow controller for controlling the flow rate of the paint supplied to the paint sprayer in real time according to the calculated value. The method according to claim 1,
Further comprising a coating film thickness setting unit for inputting a thickness of a coating film to be formed on the coated surface. The method according to claim 1,
Wherein the distance measuring unit is installed at a front end of the paint sprayer. The method according to claim 1,
Wherein the speed measuring unit includes a motion sensor.

KR1020140124888A 2014-09-19 2014-09-19 Paint spraying appratus to form a uniform film thickness KR20160033972A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190010017A (en) * 2017-07-20 2019-01-30 (주)피엠피 Measuring device of primer normal supply and measuring method primer normal supply using the same
CN110369202A (en) * 2019-07-17 2019-10-25 广东博智林机器人有限公司 Spray lifting device, spraying equipment and the control method for spraying lifting device
KR20190126677A (en) 2018-05-02 2019-11-12 대우조선해양 주식회사 Injection flow rate controlled coating device
KR20200141293A (en) 2019-06-10 2020-12-18 대우조선해양 주식회사 Coating condition control device for position and motion of spray gun
KR20220086353A (en) * 2020-12-16 2022-06-23 공주대학교 산학협력단 Method for painting vehicle using correlation analysis between spray distance and coating thickness and vehicle painting system using thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190010017A (en) * 2017-07-20 2019-01-30 (주)피엠피 Measuring device of primer normal supply and measuring method primer normal supply using the same
KR20190126677A (en) 2018-05-02 2019-11-12 대우조선해양 주식회사 Injection flow rate controlled coating device
KR20200141293A (en) 2019-06-10 2020-12-18 대우조선해양 주식회사 Coating condition control device for position and motion of spray gun
CN110369202A (en) * 2019-07-17 2019-10-25 广东博智林机器人有限公司 Spray lifting device, spraying equipment and the control method for spraying lifting device
KR20220086353A (en) * 2020-12-16 2022-06-23 공주대학교 산학협력단 Method for painting vehicle using correlation analysis between spray distance and coating thickness and vehicle painting system using thereof

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