KR20040058146A - A maintenance method and device of paint-solvent mixture ratio for the EMI shielding painting system - Google Patents

Abstract

PURPOSE: A maintenance method and a device of a paint-solvent mixture ratio for an EMI(ElectroMagnetic Interference) shielding painting system are provided to simplify the process and thus, to improve productivity. CONSTITUTION: The maintenance method and the device(100) of a pint-solvent mixture ratio for an EMI shielding painting system includes a paint supply tank(20), a stirrer(22), a paint supply pump(26), a spray gun(28), an air unit(32), a supplemental solvent tank(40), a supplemental solvent supply pipe(42), a solvent amount adjusting means(45), and a paint usage measurer(52). Thus, EMI shielding paint(10) goes through the paint supply tank(20), the stirrer(22), the spray gun(28), and is sprayed to materials to be coated with EMI shielding paint.

Description

A maintenance method and device of paint-solvent mixture ratio for the EMI shielding painting system

The present invention relates to a method and apparatus for maintaining a paint solvent mixing ratio of an electromagnetic shielding paint coating system, and more particularly, to a configuration in which the type of the coating system is applied to an injection method and apparatus using a filling paint supply tank and a spray gun.

As is known, most home appliances, communication devices, and electronic devices generate electromagnetic waves during use, and because electromagnetic waves are not only harmful to the human body, but also affect other electronic products or equipment, electromagnetic shielding is required for all electrical and electronic devices. And mandatory in facilities.

Electromagnetic shielding is used in various home appliances, communication devices, and electronic devices, which are electromagnetic wave generating devices, but is mainly performed by coating electromagnetic shielding coatings inside and outside of the case.

Coating of electromagnetic shielding paint on electromagnetic wave generator is generally carried out by spray coating method using spray gun. In order to adjust work viscosity, evaporation speed and economic efficiency, Single or multi-component mixed solvents (including true solvents, co-solvents and diluents) are mixed with the paint stock solution.

The mixing ratio of the solvent to the electromagnetic shielding paint stock solution during the coating operation of the electromagnetic shielding paint on the electromagnetic wave generator has a significant influence on the workability of the spray coating, the performance of the electromagnetic shielding coating film on the coated material, and the coating economy.

When the mixing ratio of solvent to the electromagnetic shielding paint stock solution is out of the proper standard value, the overall workability is lowered, resulting in poor coating, and when the reference value is higher than the reference value, the electromagnetic shielding film performance is deteriorated. Degrades.

As is known, the electromagnetic shielding coating stock is mostly expensive. In particular, the high-quality electromagnetic shielding coating stocks are mainly made of expensive conductive metal powders or conductive polymers such as silver powder to satisfy the high efficiency electromagnetic shielding performance required by precision electronic devices and communication devices. The price is very high.

Therefore, in the coating operation of the electromagnetic shielding paint, considering the above matters, the appropriate amount of solvent is mixed with the electromagnetic shielding paint stock solution according to the appropriate standard mixing ratio (or the standard mixing ratio provided by the paint manufacturer) beforehand. Although the coating is performed with the paint, it is very difficult to maintain a constant solvent mixing ratio during the coating because of the characteristics of the spray coating equipment using the spray gun and the characteristics of the solvent having a high volatile temperature.

The spray coating equipment using the spray gun is filled with a certain amount of electromagnetic shielding paint in a constant volume paint supply tank equipped with a stirrer to continuously stir the paint, and pumps the paint from the supply tank to the spray gun at a constant pressure by a supply pump. The paint supplied to the spray gun is sprayed onto the coated material by the pneumatic pressure input from a separate pneumatic device, and the sprayed and remaining paint is returned to the paint supply tank through the return line.

In the spray coating equipment system using such a spray gun, after filling the appropriate amount of solvent into the paint supply tank in accordance with the pre-calculated standard mixing ratio together with the electromagnetic shielding paint stock solution before the painting operation, the solubility is increased and the specific gravity is higher than the solvent ( It is characterized by the use of agitation with a stirrer to prevent the paint stock solution having a high weight) from being settled during use, and the configuration of supplying to the spray gun side with a supply pump, and consequently exposing the recovery lines from the spray gun to the supply tank to the atmosphere. As a result, solvents with high volatility are gradually volatilized in proportion to the progress of working time, and the mixing ratio of the solvent to the electromagnetic shielding paint stock solution falls below the standard value, and thus, the amount of electromagnetic shielding paint stock solution per unit time is applied to the paint sprayed by the spray gun. This gradually increases The.

In particular, when paint is left in the paint supply tank at the end of the day's painting work, it is left in the atmospheric exposure state for approximately 15 hours before the start of the next working day. It is very difficult to measure the solvent mixing ratio of paint remaining in the supply tank and adjust it to the proper mixing ratio. Therefore, it is common to use high viscosity paint with high stock solution content of electromagnetic shielding paint as it is. There was also a problem.

The problems caused by the coating equipment and the solvent characteristics of the electromagnetic shielding coating film is to coat the electromagnetic shielding coating film on the coated material more than the standard performance, to consume the expensive electromagnetic shielding coating stock solution more than the required consumption per unit quantity It has caused enormous losses in the economics of coating coating work. Until now, in order to solve the above problems, a method of replenishing a certain amount of solvent at a time by estimating the evaporation amount of the solvent after a certain time of the cutting operation has been used. The poor quality of the painting work as well as the quality control of electromagnetic shielding film performance, which is the main purpose of electromagnetic shielding coating, had a problem.

The present invention is provided to solve the above problems,

One purpose is to measure the amount of solvent evaporation per unit time per unit operation or real time with respect to the solvent mixed electromagnetic shielding paint filled in the electromagnetic shielding paint supply tank in the electromagnetic shielding paint coating system system, the measurement By replenishing and supplying a certain amount of replenishment solvent intermittently or in real time corresponding to the evaporated amount of solvent per unit time, it is possible to maintain the solvent mixing ratio of the electromagnetic shielding paint at a certain range of reference values in all time periods of the painting work. The electromagnetic shielding coating on the material to be coated in the work can be coated with the standard performance to maintain the quality control easily and excellently, while maintaining the standard consumption of the electromagnetic shielding coating solution per unit quantity. Can significantly improve the economics of Jaffa has a shield coating paint solvent mixture proportions method of coating systems to provide.

Another object is to provide a paint solvent mixing ratio maintaining apparatus of the electromagnetic shielding paint coating system that satisfies the method of the one object.

1 is a configuration diagram of a method and a holding device for maintaining a paint solvent mixing ratio of an electromagnetic wave shielding paint coating system according to an embodiment of the present invention;

2 is a device diagram of the paint solvent mixing ratio maintenance device of an embodiment electromagnetic shielding paint coating system of the present invention

Figure 3 is another embodiment of the invention electromagnetic wave shielding paint coating system paint solvent mixing ratio maintenance method and holding device configuration

4 is a device diagram of a paint solvent mixing ratio maintenance device of another embodiment of the present invention electromagnetic shielding paint coating system

5 is a view showing the composition and method for maintaining a paint solvent mixing ratio of an electromagnetic shielding paint coating system according to another embodiment of the present invention.

6 is a device diagram of the paint solvent mixing ratio maintenance device of another embodiment of the present invention electromagnetic shielding paint coating system

7 is an exemplary embodiment of a naked eye supplement solvent supply confirmation device and a supplemental solvent amount display device applied to various embodiments of the present invention;

8 is a view showing the composition and method for maintaining a paint solvent mixing ratio of an electromagnetic shielding paint coating system according to another embodiment of the present invention.

(Short description of sign)

10: electromagnetic shielding paint 15: coating material

20: paint supply tank 22: stirrer

24: paint supply line 26: paint supply pump

28: Spray gun 30: Return line

32: pneumatic device 34: pneumatic line

40: refill solvent tank 42: refill solvent supply pipe

45: regulating valve 47, 47a: automatic control valve

50, 50a: Solvent replenishment controller 52: Height sensor

60: weight support 62: load cell

70: Falling pipe 72: Transparent window 74, 75: Upper and lower connector

80: supplemental solvent amount measuring device 81: transparent window

82: display scale 82: digital numeric display device 84: height sensor

100, 100a, 100b: Embodiments of the Invention A Solvent Mixing Ratio Maintaining Method of the Electromagnetic Shielding Coating System and Its Configuration

Method for maintaining the paint solvent mixing ratio of the electromagnetic shielding paint coating system of the present invention for achieving the above object,

Filling a certain amount of the electromagnetic shielding paint with a predetermined standard mixing ratio (weight ratio) to the paint supply tank of a predetermined capacity and a constant amount while stirring continuously during use by a stirrer installed on the upper side of the paint supply tank, The electromagnetic shielding paint is pumped and supplied from the supply tank to the spray gun with a predetermined pressure by the supply pump, and the electromagnetic shielding paint supplied to the spray gun is sprayed onto the material to be coated by the air pressure input from a separate pneumatic device. In the electromagnetic shielding paint coating system of the configuration that is sprayed from the spray gun and the remaining paint is recovered back to the paint supply tank through a return line,

Measuring the amount of solvent evaporation per elapse of the corresponding painting work time according to the coating condition of the material to be coated on the coating system operated on the electromagnetic shielding paint filled in the electromagnetic shielding paint supply tank;

Converting the supply amount of the supplementary solvent with respect to the evaporation amount of the solvent per the corresponding elapse of the painting work time according to the coating conditions of the coating material measured in the step;

A certain amount of supplementary solvent corresponding to the evaporation amount of the solvent per the elapsed time of the painting work according to the coating conditions of the coated material converted in the above step, in a predetermined time unit to the electromagnetic shielding paint filled in the paint supply tank from the supplemental solvent supply tank By supplementary supply, characterized in that it comprises a step of maintaining the solvent mixture ratio of the electromagnetic shielding paint at a predetermined range of reference values in all time zones of the painting operation.

In the composition of the paint solvent mixing ratio maintenance method of the electromagnetic shielding paint coating system of the present invention, for the electromagnetic shielding paint filled in the electromagnetic shielding paint supply tank, the corresponding coating according to the coating conditions of the coating material on the coating system is operated The step of measuring the amount of solvent evaporation per elapsed working time may be performed by measuring the volume of solvent evaporation per unit time of the electromagnetic shielding paint filled in the electromagnetic shielding paint supply tank or the weight of the solvent evaporation in terms of conversion. .

Paint solvent mixing ratio maintenance device of the electromagnetic shielding paint coating system of the present invention for achieving the above another object,

This supply tank is filled with a certain amount of the electromagnetic shielding paint in which a predetermined amount of standard solvent is mixed with the raw material of the electromagnetic shielding paint in a predetermined amount of the paint supply tank, and continuously agitated during use by an agitator provided on the upper side of the paint supply tank. Electromagnetic shielding paint is pumped and supplied to the spray gun with a constant pressure from the supply pump, and the electromagnetic shielding paint supplied to the spray gun is sprayed onto the coated material by air pressure input from a separate pneumatic device, and sprayed from the spray gun. In the electromagnetic shielding paint coating system configured to be recovered and the remaining paint is returned to the paint supply tank through the return line,

A solvent replenishment tank having a standard for accommodating a replenishment solvent having a predetermined capacity and comprising a housing separated from the electromagnetic shielding paint supply tank;

Replenishment is formed by a conduit extending from one side of the bottom of the solvent supplement tank to an inner side of the electromagnetic shielding paint supply tank, supplying the supplementary solvent contained in the solvent supplement tank to the inner side of the electromagnetic shielding paint supply tank Solvent supply line;

Solvent replenishment amount adjusting means is provided on one side of the replenishment solvent supply line to adjust the amount of replenishment solvent supplied to the inner side of the electromagnetic shielding paint supply tank;

In order to measure the amount of evaporation of solvent per corresponding painting time according to the coating conditions of the coating material measured on the coating system in operation, the volume or weight of the electromagnetic shielding paint filled in the paint supply tank per unit time is measured in real time. Paint usage measuring means to measure by; With

Corresponds to the evaporation amount of solvent per the painting time according to the coating conditions of the coated material measured on the coating system in operation, and supplies a certain amount of supplementary solvent to the electromagnetic shielding paint filled in the paint supply tank in real time for painting work. It is characterized in that it is formed in a configuration that maintains the solvent mixture ratio of the electromagnetic shielding paint at a predetermined range in all time zones.

The solvent replenishment adjusting means in the composition of the paint solvent mixing ratio maintenance device of the electromagnetic shielding paint coating system of the present invention may be configured as a manual operation valve.

In the composition of the paint solvent mixing ratio maintaining apparatus of the electromagnetic shielding paint coating system of the present invention, the solvent replenishment amount adjusting means may be configured as a variable control type automatic control valve which is automatically opened and closed controlled by an electronic control signal.

In the composition of the paint solvent mixing ratio maintenance apparatus of the electromagnetic shielding paint coating system of the present invention, a preferred aspect of the paint usage measuring means for measuring the amount of use per unit time of the electromagnetic shielding paint filled in the paint supply tank, paint supply tank It consists of a contact height measuring sensor for measuring the filling height of the paint filled in the inside or a non-contact height measuring sensor such as an ultrasonic sensor or a laser sensor.

In another preferred embodiment of the paint usage measuring means for measuring the amount of the electromagnetic shielding paint filled in the paint supply tank per unit time, an example load cell for measuring the fill weight or change weight of the paint filled in the paint supply tank and It is composed of the same weight sensor.

In the composition of the paint solvent mixing ratio maintaining apparatus of the electromagnetic shielding paint coating system of the present invention, in conjunction with the paint usage measuring means for measuring the amount of the electromagnetic shielding paint per unit time in real time on the coating system in operation, the paint usage measuring means It can be configured to further include a solvent replenishment control device for automatically controlling the solvent replenishment adjusting means in real time by converting the amount of solvent evaporation according to the paint usage per unit time measured in real time by have.

The composition of the paint solvent mixing ratio maintaining apparatus of the electromagnetic shielding paint coating system of the present invention may further include a supplement solvent amount display device for displaying a supplement solvent supply state.

The composition of the paint solvent mixing ratio maintaining apparatus of the electromagnetic shielding paint coating system of the present invention may further include a naked eye supplement solvent supply confirming device capable of visually confirming the supplementary solvent supply state.

The composition of the paint solvent mixing ratio maintaining apparatus of the electromagnetic shielding paint coating system of the present invention may further include a refilling solvent tank filling amount measuring device for measuring the filling amount of the refilling solvent tank.

Hereinafter, the configuration of the present invention in detail by the preferred embodiments are as follows.

1 and 2 illustrate a method of maintaining a paint solvent mixing ratio and a holding device 100 of an electromagnetic wave shielding paint coating system according to an embodiment of the present invention.

The embodiment of the paint solvent mixing ratio maintaining method and the holding device 100 of the electromagnetic wave shielding paint coating system represents a basic configuration for carrying out the present invention.

According to the exemplary embodiment, a certain amount of the electromagnetic shielding paint 10 in which a solvent is mixed in a predetermined standard mixing ratio (weight ratio) with respect to the coating material supply tank 20 having a predetermined capacity is filled, and the paint supply tank ( The electromagnetic shielding paint 10 is supplied from the paint supply tank 20 to the paint supply line with constant pressure by the supply pump 26 while continuously stirring during use by the pneumatic stirrer 22 installed above the 20). Pumping and supplying to the spray gun 28 through the 24, the electromagnetic shielding paint supplied to the spray gun 28 is coated by the pressure air input from the separate pneumatic device 32 to the pneumatic line 34 Sprayed to the material 15, the paint sprayed from the spray gun 28 is applied to an example electromagnetic shielding paint coating system that is returned to the paint supply tank 20 through the return line (30).

According to one embodiment configuration of the present invention, a replenishment solvent tank 40 having a standard for accommodating a replenishment solvent of a predetermined capacity is provided on one side of the paint supply tank 20.

The replenishment solvent tank 40 is provided with a replenishment solvent supply pipe 42 installed to supply a replenishment solvent to one side of the lower side of the paint supply tank 20.

The replenishment solvent supply pipe 42 is provided with a control valve 45 for adjusting the replenishment solvent supply amount (replenishment amount).

An inner side of the paint supply tank 20 is provided with a height sensor 52 for measuring the amount of paint changes depending on the fill amount of the first electromagnetic shielding paint and the use of the paint.

The height sensor 52 may be configured as a contact height measuring sensor such as a general ruler or a photo sensor which can measure the current paint filling amount of the paint supply tank 20 as a height, but more preferably. The current consists of a non-contact electronic height measuring sensor such as an ultrasonic sensor or laser sensors that can sense the fill height as an electronic signal (digital or analog signal).

One embodiment, which is a basic embodiment of the present invention described above, is used for the coating solvent mixing ratio maintenance method of the electromagnetic shielding paint coating system and the configuration of the holding device 100 in the conventional electromagnetic shielding coating process.

In the normal coating process of electromagnetic shielding paint, the appropriate amount is adjusted to the appropriate standard mixing ratio (or the standard mixing ratio provided by the paint manufacturer) for the coating material 15 to be coated on the electromagnetic shielding coating solution before operation of the coating equipment. By filling the inside of the paint supply tank (20) by mixing the solvent

Subsequently, while operating the stirrer 22 to stir the filled paint, the paint supply pump 26 is operated to spray the electromagnetic shielding paint filled in the paint supply tank 20 through the paint supply line 24. It is the same to perform the coating operation of the electromagnetic shielding paint by spraying a proper amount to the material to be coated 15 with the spray gun 28 while pumping and supplying it at a constant pressure.

As described above, when the coating operation of the conventional electromagnetic shielding paint is performed, the electromagnetic shielding paint pumped toward the spray gun 28 in a state filled with the paint supply tank 20 and partially returned to the return line has a high volatility. Due to the characteristics of the solvent, the proportion of the solvent gradually evaporates in proportion to the progress of the working time, so that the mixing ratio of the solvent to the stock solution of the electromagnetic shielding paint falls below the reference value, so that the paint sprayed onto the spray gun 28 is electromagnetic shielding paint per unit time. The consumption of stock solution gradually increases.

When this phenomenon occurs, the electromagnetic wave shielding coating film having a standard performance value or more is coated on the material to be coated 15. After the coating operation is performed for a predetermined time, the initial filling height is zero by the height sensor 52 installed in the paint supply tank 20. In this state, the change in the height of the electromagnetic wave shielding paint is continuously measured, and the amount of paint used is differently measured according to the height change. After converting the amount of evaporation of the solvent into the prior data, the amount of replenishment supply of the supplemental solvent corresponding to the amount of evaporation of the solvent is calculated.

When the replenishment supply amount of the replenishment solvent is calculated, the control valve 45 installed at the bottom of the replenishment solvent tank 40 is operated to supply the corresponding replenishment amount of the replenishing solvent, and the replenishment solvent is supplied through the replenishment solvent supply pipe 42. (20) Supply to electromagnetic shielding paint inside.

The supply operation of the replenishment solvent is arbitrarily performed according to the painting work amount or the elapsed time of the working time. In general, the effective capacity of the paint supply tank 20 is designed after the start of work, considering that it is designed according to the daily work amount. It will be continuously performed after a certain time.

According to the configuration and the use state of the paint solvent mixing ratio maintenance method and the holding device 100 of the embodiment of the present invention, the electromagnetic wave shielding paint coating system as described above, the electromagnetic wave shielding coating by the conventional coating equipment and system of the electromagnetic shielding paint In the coating process of the coating, after a certain working time has elapsed after filling the paint supply tank 20 with the electromagnetic shielding paint mixed with the solvent in the standard mixing ratio, it is necessary to replenish the coating in a timely manner with the appropriate amount of solvent evaporation. It is possible to maintain the solvent mixture ratio of the electromagnetic shielding paint at a predetermined range in all time zones of the work, thereby preventing the excessive consumption of the electromagnetic shielding coating stock solution.

One embodiment of the present invention carried out as described above the composition of the paint solvent mixing ratio maintenance method and the holding device 100 of the electromagnetic shielding paint coating system, the supply time (measurement of paint consumption and measurement of working time) of the supplementary solvent Artificially determined, the supply amount of the replenishing solvent is also converted according to previously prepared data, and the supply valve of the replenishing solvent is also configured to be manually operated, so that separate personnel and processes are required for the implementation. Another embodiment for automatically measuring and supplying a replenishment solution is provided as a preferred method for resolving this and increasing productivity.

3 and 4 illustrate a method of maintaining a paint solvent mixing ratio and a holding device 100a of an electromagnetic shielding paint coating system according to another embodiment of the present invention.

In another embodiment, the composition and method of maintaining the paint solvent mixing ratio of the electromagnetic shielding paint coating system and the holding device (100a), the paint usage measured by the height sensor in the paint supply tank by the volume sensor as an electronic signal, According to the measured paint usage electronic signal, the solvent evaporation amount and the supply amount of the replenishment solvent are automatically converted, and the supply operation of the replenishment solvent is also automatically provided.

Electromagnetic shielding paint coating equipment to which the other embodiment configuration is applied applies the same configuration as the supply configuration of the coating equipment and the supplemental solvent of the above-described embodiment.

The difference is that the replenishment solvent supply configuration of the replenishment solvent supply line 42 in the replenishment solvent supply line 42 of the replenishment solvent tank 40 is provided with an automatic control valve 47,

The height sensor 52 is installed on one side of the paint supply tank 20, and one side of the coating equipment is further provided with a solvent replenishment amount control device 50.

The height sensor 52 is a sensor for measuring the paint filling height according to the use of the filled electromagnetic shielding paint, the electronic to apply a digital or analog signal corresponding to the filled filling height to the solvent replenishment control device 50 It is a signal configuration.

The solvent replenishment amount control device 50 is supplied with a power supply unit for supplying operating power to the height sensor 52 and a filling height signal applied from the height sensor 52 and according to the working time and the amount of use according to the built-in data. And a central processing unit that controls the automatic control valve 47 by a valve control signal corresponding to the calculated solvent replenishment amount.

Another embodiment of the present invention described above is the composition of the paint solvent mixing ratio maintenance method and the holding device 100a of the electromagnetic shielding paint coating system is used as follows in the coating equipment and coating operation process of the conventional electromagnetic shielding paint.

When the coating operation is performed by the coating equipment of the conventional electromagnetic shielding paint, the filling height of the electromagnetic shielding paint filled in the paint supply tank 20 is changed, and the changed filling height is continuously increased by the height sensor 52. ) Is applied to the solvent replenishment amount control device 50.

The solvent replenishment control device 50 checks the fill height signal continuously applied from the height sensor 52 and calculates and measures the amount of solvent evaporation according to the elapse of the working time based on the data stored therein at a predetermined starting point. The solvent replenishment amount corresponding to the calculated solvent evaporation amount is calculated, and the automatic control valve 47 is controlled by a valve control signal corresponding to the solvent replenishment amount calculated by the central processing unit.

When the automatic control valve 47 is controlled by a valve control signal corresponding to the solvent replenishment amount of the solvent replenishment amount control device 50, the replenishment solvent prepared in the replenishment solvent tank 40 opens and closes the controlled automatic control valve 47. According to the figure, a predetermined amount is continuously supplied to the electromagnetic shielding paint of the paint supply tank 20 continuously or intermittently.

Supplementary solvent supply operation in another embodiment as described above is configured to operate even when the evaporation of the solvent substantially occurs over time even if the filling height does not change, depending on the amount of painting work or the elapsed working time.

According to the configuration and use state of the paint solvent mixing ratio maintenance method and the holding device 100a of the electromagnetic wave shielding coating system of the present invention as described above, the electromagnetic wave shielding coating by the conventional coating equipment and system of the electromagnetic shielding paint In the coating work process of measuring the amount of solvent evaporation inevitably generated after a certain working time from filling the paint supply tank 20 with the electromagnetic shielding paint mixed with the solvent in the standard mixing ratio,

Automatic conversion in real time based on the measurement of the filling time in the paint supply tank by the elapsed working time and the height sensor, and the supply timing of the replenishing solvent and the replenishment solvent supply amount are also preset by the solvent replenishment control device 50. It is automatically converted according to the data input to the control, and the supply amount of the replenishment solvent is also automatically controlled by the automatic control valve 47, so to supply the appropriate amount of replenishment solvent that can maintain the mixing ratio of the reference value in a timely manner in real time. It is possible to automatically maintain the solvent mixture ratio of electromagnetic shielding paint in a certain range automatically without any personnel or process at all times during the coating work, thereby preventing excessive consumption of the original liquid shielding paint. It can be.

Another embodiment of the present invention carried out as described above The method of maintaining the paint solvent mixing ratio and the configuration of the holding device (100a) of the electromagnetic shielding paint coating system, the paint usage is one of the important functions to determine the supply amount and the timing of supply of the supplementary solvent The same effect can be obtained even when the measuring means for the weight is replaced.

5 and 6 illustrate a method of maintaining a paint solvent mixing ratio and a holding device 100b of an electromagnetic shielding paint coating system according to another embodiment of the present invention.

According to another embodiment of the present invention, a method for maintaining a paint solvent mixing ratio and a holding device (100b) of the electromagnetic shielding paint coating system may be performed by measuring the weight of the paint using a weight sensor in a paint supply tank, and according to the measured paint use weight. It provides a configuration that automatically converts the amount of evaporation of solvent and the amount of replenishment of solvent and the supply operation of replenishment of solvent.

The electromagnetic shielding paint coating equipment to which the configuration of another embodiment is applied is the same as the coating equipment of the above-described embodiment, and the supply structure of the supplementary solvent is compared with the other embodiments of the paint supply tank 20 as a paint usage measuring means. It differs in that it is implemented by the weighing apparatus which measures a weight, and the solvent replenishment amount control apparatus 50a.

The weighing apparatus for measuring the weight of the paint supply tank 20 is provided with one or more load cells 62, which is a type of weight sensor, on the upper surface of the base to support the paint supply tank 20 on its upper surface. The weight support 60 is installed, and the paint supply tank 20 is installed on the upper surface of the weight support 60 to correspond to the weight change according to the use of the electromagnetic shielding paint filled in the paint supply tank 20. It is the structure which applies a digital or analog signal to the solvent replenishment amount control apparatus 50a.

The solvent replenishment amount control device 50a is a power supply unit for supplying operating power to the load cell 62, and a solvent evaporation amount and solvent according to the working time and the amount of use based on the data received by receiving a weight signal applied from the load cell 62. And a central processing unit that controls the automatic control valve 47 by a valve control signal corresponding to the calculated solvent replenishment amount.

Another embodiment of the present invention described above is the composition of the paint solvent mixing ratio maintenance method and the holding device 100b of the electromagnetic shielding paint coating system is used as follows in the coating equipment and coating operation process of the conventional electromagnetic shielding paint.

When the coating operation is performed by the coating equipment of the conventional electromagnetic shielding paint, the weight of the electromagnetic shielding paint filled in the paint supply tank 20 is changed, and the changed weight is continuously applied to the load cell 62. And is applied to the solvent replenishment amount control device 50a.

The solvent replenishment amount control device 50a checks the weight signal continuously applied from the weight sensor 52 and checks the evaporation amount of the natural evaporated solvent and the replenishment amount of solvent over time according to the data stored therein at a predetermined starting point. The automatic control valve 47a is controlled by a valve control signal corresponding to the replenishment solvent amount calculated by the central processing unit.

When the automatic control valve 47a is controlled by a valve control signal corresponding to the replenishment amount of the solvent replenishment amount control device 50a, the replenishment solvent prepared in the replenishment solvent tank 40 opens and closes the controlled automatic control valve 47a. According to the figure, a predetermined amount is continuously supplied to the electromagnetic shielding paint of the paint supply tank 20 continuously or intermittently.

The supplementary solvent supply operation in another embodiment as described above is configured to operate even when the evaporation of the solvent substantially occurs over time even if the weight does not change, depending on the amount of painting work or the elapsed working time.

According to the configuration and the use state of the paint solvent mixing ratio maintenance method and the holding device 100b of the embodiment of the present invention, the electromagnetic wave shielding paint coating system as described above, the electromagnetic wave shielding paint by the conventional coating equipment and system of the electromagnetic shielding paint In the coating operation process of the solvent, the amount of solvent evaporation that is inevitably generated after a certain working time after filling the paint supply tank 20 with the electromagnetic shielding paint mixed with the solvent in the standard mixing ratio,

Automatically converts and measures the filling time in the paint supply tank by the elapsed working time and the weight sensor in real-time in real time. It is automatically converted according to the data inputted in and the adjustment of the supply amount of the replenishment solvent is also automatically controlled by the automatic control valve 47a, so that it is possible to supply the replenishment solvent of the appropriate amount that can maintain the mixing ratio of the reference value in a timely manner in real time. It is possible to automatically maintain the solvent mixture ratio of electromagnetic shielding paint in a certain range automatically without any personnel or process at all times during the coating work, thereby preventing excessive consumption of the original liquid shielding paint. It can be.

Various embodiments of the present invention as described above, the composition and the maintenance method of the paint solvent mixing ratio of the electromagnetic shielding paint coating system 100 and 100a (100b) is a preferred configuration for enhancing the use effect, the supplementary solvent tank ( 40) a visual supplement solvent supply checking device capable of visually confirming a supply state of the supplementary solvent supplied to the paint supply tank 20 and the remaining amount and the cumulative supply amount of the supplementary solvent filled in the supplementary solvent tank 40 A supplementary solvent amount display device may be further included.

FIG. 7 illustrates an embodiment of a naked eye replenishing solvent supply confirmation device and a replenishing solvent amount display device which can be commonly implemented in various embodiments of the present invention.

The configuration of the supplementary solvent supply confirmation device of the naked eye type supplementary solvent supply confirmation device of the embodiment is connected to the lower side of the control valve 45 in the supplementary solvent supply pipe 42 of the supplementary solvent tank 40 by the supplying configuration of the supplementary solvent, It has a top and bottom connector (74) (75) is connected to the supplementary solvent supply pipe (42) up and down, the inside is penetrated with the upper and lower connector (74) (75) and sealed with the outside and closed with a transparent window (72) on the front It is a configuration formed of a downfall pipe (70).

The configuration of the drop pipe 70 can be applied in the same configuration to other embodiment 100a, 100b holding device configuration.

According to the configuration of the above-mentioned drip pipe 70, the supply state of the replenishment solution supplied to the paint supply tank 20 by a predetermined amount from the replenishment tank 40 by the control valve 45 by the transparent window 72 It is understood by the naked eye that it is possible to easily check whether the supplemental solvent is supplied normally and malfunction such as a malfunction or a poor supply.

On the other hand, the configuration of the refilling solvent amount display device of one embodiment, which is provided integrally in the refilling solvent tank 40 itself or provided as a separate unit on the outside, an example is the inside of one side of the refilling solvent tank 40 The transparent window 76 vertically installed to determine the height of the solvent filled in the outside, and is provided with a display scale 77 in close proximity to the side of the transparent window 76.

According to the configuration of the replenishment solvent amount display device having a transparent window 76 and the display scale 77 in the replenishment tank 40 as described above, the current filling amount of the replenishment solvent filled in the replenishment tank 40 It can be grasped numerically by the naked eye, and has an effect of easily checking the amount of the initial filling amount of the supplement and the remaining amount in use.

Another example of the configuration of the replenishment solvent amount measuring device 80 is provided with an electronic signal type height sensor 81 on one side of the replenishment solvent tank 40, and the digital number display electrically connected to the height sensor 81. The device 82 may be provided as a separate unit, and may be provided in a configuration in which the device 82 is connected to the solvent replenishment amount control device 50 (50a) of another embodiment described above.

According to the configuration of the electronic signal type height sensor 81 and the digital number display device 82, it is possible to accurately and intuitively determine the current filling amount of the replenishment solvent filled in the replenishment tank 40 by the digital number. The display device 82 may be provided with an associative device, or depending on the configuration of the central processing unit of the solvent replenishment amount control device 50 (50a), whether or not the cumulative replenishment solution amount, remaining amount, elapsed time, current replenishment supply amount, replenishment state, Since the pilot lamp point can be selectively and annually displayed, it is possible to grasp the general matters on the replenishment solution of the replenishment solution more clearly and to easily manage and adjust.

The various embodiments of the present invention described above illustrate preferred embodiments of the present invention, but the configuration of the present invention is not necessarily limited thereto.

For example, it is applicable also to the structure which does not use a stirrer for the structure of a paint supply tank.

In addition to the configuration of the solvent replenishment tank is formed in a separate unitized housing separate from the paint supply tank, the solvent refill tank is provided as a separate enclosure from one side of the paint supply tank, or using the whole or part of the lid of the paint supply tank It can also be implemented as a structure.

In addition, the device for measuring the filling amount and the amount of the paint supply tank or the filling amount and the amount of the supplementary solvent tank of the present invention, in addition to the illustrated configuration, depending on the material or form of the tank and the characteristics of the paint used, proximity sensor, optical sensor, magnetic sensor It can be implemented by selectively applying.

In addition, the method and maintaining the paint solvent mixing ratio of the electromagnetic shielding paint coating system of the present invention is used by mixing a highly volatile solvent in the paint, such as a conductive paint used to obtain the electromagnetic shielding effect or the electromagnetic wave absorbing effect in addition to the electromagnetic shielding paint It can be applied to the coating equipment of all kinds of paints with the same configuration and compatibility.

As described above, according to the method and the maintaining apparatus of the paint solvent mixing ratio of the electromagnetic shielding paint coating system of the present invention, in the electromagnetic shielding paint coating system system, the electromagnetic shielding paint supply tank is filled with very simple and inexpensive device cost. For solvent-mixed electromagnetic wave shielding paints, the amount of solvent evaporation per unit time is measured per unit operation or in real time according to the elapse of the painting operation time, and a certain amount of supplemental solvent is intermittently or in real time corresponding to the measured amount of solvent evaporation per unit time. It automatically replenishes and maintains the solvent mixing ratio of the electromagnetic shielding paint at a certain range in all time periods of the painting work.In the painting work, the electromagnetic shielding film on the coated material is coated with the standard performance to lower the defective rate and quality. Easy to maintain while maintaining excellent In addition, it is possible to maintain the consumption of the electromagnetic shielding paint stock solution per unit quantity, which has the effect of remarkably improving the economics of the electromagnetic shielding paint coating work, in particular by these effects, professional coating company of electromagnetic shielding paint In addition, it is possible to increase the company's profitability and increase the competitiveness of orders by reducing the coating cost when used in manufacturing and facilities of the electromagnetic shielding paint coating system, and to obtain high-cost electromagnetic shielding coating products with superior quality control. You can expect it.

Claims (10)

Fills a certain amount of electromagnetic shielding paint with a certain standard mixing ratio (weight ratio) to the paint supply tank of a certain capacity, and then shields the electromagnetic wave to the spray gun from the paint supply tank with a certain pressure. It pumps and supplies paint, and the electromagnetic shielding paint supplied to the spray gun is sprayed onto the material to be coated by air pressure input from a separate pneumatic device, and the paint sprayed from the spray gun is returned to the paint supply tank through a return line. In the electromagnetic shielding paint coating system having a configuration that is recovered by Measuring the amount of solvent evaporation per elapse of the corresponding painting work time according to the coating condition of the material to be coated on the coating system operated on the electromagnetic shielding paint filled in the electromagnetic shielding paint supply tank; Converting the supply amount of the supplementary solvent with respect to the evaporation amount of the solvent per the corresponding elapse of the painting work time according to the coating conditions of the coating material measured in the step; A certain amount of supplemental solvent corresponding to the supply amount of the supplemented solvent converted in the above steps is supplemented and supplied to the electromagnetic shielding paint filled in the paint supply tank from the supplemental solvent supply tank in a quantitative or variable amount, thereby shielding the electromagnetic wave at all times of the painting operation. A method for maintaining a paint solvent mixing ratio of an electromagnetic shielding paint coating system, comprising: maintaining a solvent mixing ratio of a paint in a predetermined range. The method of claim 1, wherein the amount of solvent evaporation per coating time elapsed according to the coating conditions of the material to be coated on the coating system in operation is measured for the electromagnetic shielding paint filled in the electromagnetic shielding paint supply tank. A method of maintaining a paint solvent mixing ratio of an electromagnetic shielding paint coating system, characterized in that the volume measurement per unit time of the paint is measured and converted. The method of claim 1, wherein the amount of solvent evaporation per coating time elapsed according to the coating conditions of the material to be coated on the coating system in operation is measured for the electromagnetic shielding paint filled in the electromagnetic shielding paint supply tank. A method of maintaining a paint solvent mixing ratio of an electromagnetic shielding paint coating system, characterized in that the weight of the paint is measured per unit time. Fills a certain amount of electromagnetic shielding paint with a certain amount of standard solvent mixed with the electromagnetic shielding paint stock solution in a certain amount of the paint supply tank, and pumps the electromagnetic shielding paint to the spray gun with a constant pressure from the paint supply tank. The electromagnetic shielding paint supplied to the spray gun is sprayed onto the material to be coated by air pressure input from a separate pneumatic device, and the paint sprayed from the spray gun is recovered to the paint supply tank through the return line. In the electromagnetic shielding paint coating system, A solvent replenishment tank having a standard for accommodating a predetermined amount of replenishing solvent and comprising a housing separated from the electromagnetic shielding paint supply tank; A replenishment is formed by a conduit extending from one side of the lower end of the solvent supplement tank to an inner side of the electromagnetic shielding paint supply tank, and supplies the supplementary solvent contained in the solvent supplement tank to the inner side of the electromagnetic shielding paint supply tank. Solvent supply line; Solvent replenishment amount adjusting means which is provided on one side of the replenishment solvent supply line and adjusts the replenishment amount of solvent supplied to the inner side of the electromagnetic shielding paint supply tank; In order to measure the amount of evaporation of solvent per corresponding painting time according to the coating conditions of the coating material measured on the coating system in operation, the volume or weight of the electromagnetic shielding paint filled in the paint supply tank per unit time is measured in real time. Paint usage measuring means to measure by; With Forming and supplying a certain amount of supplementary solvent to the electromagnetic shielding paint filled in the paint supply tank at regular intervals or variably to form a composition that maintains the solvent mixture ratio of the electromagnetic shielding paint at a predetermined range in all time periods of the painting work. Paint solvent mixing ratio maintenance device of the electromagnetic shielding paint coating system, characterized in that. The method of claim 4, wherein the solvent replenishment amount adjusting means comprises an automatic control valve; The amount of paint measured in real time by the paint usage measuring means in connection with the paint usage measuring means for measuring in real time the volume of use or the weight of the electromagnetic shielding paint filled in the paint supply tank on the operating coating system in real time. And a solvent replenishment amount control device for calculating and converting a replenishment solvent supply amount corresponding to the replenishment solvent in real time to automatically control the automatic control valve in real time. 5. The electromagnetic shielding coating of claim 4, further comprising an electronic signal height sensor for measuring the filling amount of the supplemental solvent, and a digital numeric display device electrically connected to the height sensor. A paint solvent mixing ratio maintenance system of the system. The fill level of the electromagnetic shielding paint of claim 4, wherein the paint usage measuring means for measuring the amount of electromagnetic shielding paint filled in the paint supply tank per unit time in real time is installed on one side of the upper portion of the paint supply tank. Paint solvent mixing ratio maintenance device of the electromagnetic shielding paint coating system, characterized in that consisting of any one of the ultrasonic sensor or laser sensor for measuring the. The method of claim 4, wherein the paint usage measuring means for measuring in real time the amount of the electromagnetic shielding paint filled in the paint supply tank in real time, the weight support for supporting the paint supply tank from the bottom, and the lower surface of the weight support and An apparatus for maintaining a mixing ratio of a paint solvent in an electromagnetic shielding paint coating system, comprising a weight measuring device configured to measure a weight of a paint supply tank, comprising one or more weight sensors placed between expectations. [5] The apparatus of claim 4, wherein the replenishing solvent supply line of the refilling solvent tank further comprises a replenishing solvent amount display device for displaying a replenishing solvent supply state. . The apparatus of claim 4, wherein the refilling solvent tank further comprises a refilling solvent amount measuring device configured to measure a filling amount or a use amount of the refilling solvent. 6.