JP2003190847A - Coating material feed apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized, inexpensive and remarkably simply controllable coating material feed apparatus capable of uniformly mixing even a coating material such as a water based two component mixing type coating material in which a principal agent and a curing agent are hardly mixed with each other to feed it to a coater or a coating material tank. <P>SOLUTION: In the coating material feed apparatus for feeding the coating material prepared by mixing ≥2 kinds of coating material components in a prescribed ratio to the coating material tank (2) mounted in the coater, each coating material component is uniformly distributed by separately and simultaneously pushing out each coating material component in the quantity corresponding to the mixing ratio by a measuring cylinder (4), filling the coating material components preliminarily mixed in a line mixing type preliminary mixer (5) into a force-feeding cylinder (6) and passing the coating material through a jetting type distribution mixer (7) when the coating material is forcibly fed to the coating material tank (2) by the force-feeding cylinder (6) to form the coating material into a jet stream by the fluid pressure. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint prepared by mixing two or more kinds of paint components at a predetermined ratio, and more particularly to a water-based two-component mixed paint composed of a main agent and a curing agent, and The present invention relates to a paint feeding device that feeds a paint tank that is equipped or detachably attached.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of environmental protection on a global scale, the regulations on organic solvents discharged in the painting process and the VOC regulations on paints have increased, and in the painting industry, in order to meet such demands, water-based solvents that do not use organic solvents are used. Paints have been developed and their market size is expanding.

In the coating of automobile bodies, undercoating,
Of the middle coat and top coat, the bottom coat is originally coated with water-based paint by electrodeposition coating, and even with the middle coat that used to use organic solvent-based paint, most of it is now switching to water-based paint or powder coating. is there.

Also, as for the top coat, most of the base coats are being replaced with water-based paints or powder paints except for some special colors, but only clear coats, which require high quality, have excellent appearance, weather resistance and There is no water-based paint that satisfies high coating quality in terms of water resistance, chemical resistance, acid rain resistance, scratch resistance, etc., and there is no choice but to use organic solvent-based one-component or two-component mixed type paint. It was the current situation.

However, recently, as an aqueous clear coat of a strong coating film having physical properties not inferior to those of an organic solvent-based two-component mixed type paint, an aqueous two-component mixed type paint in which a main agent and a curing agent are mixed and used. It has been developed. This water-based two-component mixed paint is a base resin containing a water-soluble or water-dispersible polyol having a hydroxyl group, and a curing agent containing water-dispersible polyisocyanate as a main component, which is cross-linked and cured. Is.

[0006]

However, in this type of water-based two-liquid mixed type coating material, the water-dispersible polyol as the main component is hydrophilic, whereas the polyisocyanate as the curing agent is hydrophobic. However, there is a problem that water and oil are easily separated and it is difficult to mix them uniformly.

For this reason, a mechanically agitated and blended material is supplied to the coating machine in advance by a blender or the like.
When the mixture is stirred and mixed, the main agent and the curing agent start a curing reaction, so when coating continuously for a long time, such as automobile coating, the coating gradually cures while it is being supplied, and the coating viscosity Change and the coating quality is not constant, the paint remaining in the paint supply pipe hardens and causes clogging, and it is also possible to cause coating defects called spots that are discharged from the coating machine and adhere to the coating surface. There was a possibility that it would occur.

On the other hand, the organic solvent-based two-component mixed type paint can be mixed uniformly if a static mixer is provided in the paint supply flow path, so that it can be mixed immediately before use. Although it was possible to supply the paint while mixing, the water-based two-component mixed paint is difficult to mix as described above, so even if a static mixer is installed in the paint supply channel, the paint can be mixed uniformly. However, sufficient coating performance could not be obtained.

Further, in the two-component mixed type coating material, when the mixing ratio of the main agent and the curing agent changes, the physical properties of the mixed coating material also change. Therefore, in order to maintain uniform coating quality, the mixing ratio is accurately controlled. On the other hand, it is desirable that the control is extremely simple, does not get in the way when it is installed on the coating line, and the equipment cost and running cost are low.

In view of the above, according to the present invention, even a paint such as a water-based two-component mixed paint in which a main component and a curing agent are difficult to mix can be fed to a coater, a paint tank, etc. while uniformly mixing them. It is a technical subject to provide a small-sized, inexpensive paint feeder which is extremely easy to control.

[0011]

In order to solve this problem, the invention of claim 1 is to equip a coating machine or the like with a paint prepared by mixing two or more kinds of paint components in a predetermined ratio. Alternatively, in a paint feeding device that feeds to a paint tank that is detachably mounted, a metering cylinder that presses out the paint components individually and simultaneously by an amount corresponding to the mixing ratio thereof, and the pressurizing cylinder that presses out from the cylinder. A pipe-stirring type premixer for premixing by passing the paint components, a pressure-feeding cylinder for pressure-feeding the paint premixed with the paint components in the premixer to the coating machine or paint tank, and from the cylinder. The present invention is characterized in that a spray-type diffusion mixer is provided which makes the paint flow into a jet by the fluid pressure of the paint to be pumped and uniformly diffuses each paint component.

The case of mixing and feeding the main component and the curing agent, which are the coating components of the water-based two-component mixed coating composition, will be described using the invention of claim 1. The main component and the curing agent are mixed from the measuring cylinder. Separately and at the same time, the respective components corresponding to the ratio are squeezed out, and each paint component is fed to the premixer at a constant flow rate ratio corresponding to the mixing ratio to be premixed, whereby each paint component is uniformly dispersed. It

Therefore, the paint mixed in the premixer is filled in the pressure-feeding cylinder in a state in which the paint components are uniformly dispersed, and the mixing ratio thereof is always maintained constant.

Since the paint in which the paint components are uniformly dispersed in this way is temporarily stored in the pressure-feeding cylinder, the molecular diffusion proceeds at the boundary surface between the paint components by utilizing the time, and The paint components become familiar with each other.

However, at this point in time, even if it is said that they are uniformly dispersed, the particle size of the droplets of each coating component is still relatively large, and sufficient coating performance cannot be obtained by coating as it is.

Therefore, when the paint is pressure-fed from the pressure-feeding cylinder to the coating machine or the paint tank, the paint is jetted by the injection type diffusion mixer, and the paint components having large particle sizes are atomized and diffused. , Even the hard-to-mix paint components such as the hydrophilic main agent and the hydrophobic curing agent are uniformly mixed.

As described above, since the paint components are uniformly mixed and fed in the two stages of premixing-jet diffusion mixing, not only when the paint tank is filled with the paint, but also when the paint is applied to the coating machine. Even when directly feeding and continuously painting for a long time, each paint component can be fed while being mixed evenly just before the painting machine, and the mixture that has been mechanically mixed by a blender in advance can be stored. There is no need to keep it.

According to a second aspect of the present invention, the measuring cylinder comprises two or more barrels for individually filling the coating components in an amount corresponding to the mixing ratio, and pressing the coating components filled in each barrel. Each of the ejected pistons has the same stroke length and is adapted to be synchronously activated and deactivated.

According to the second aspect of the present invention, each barrel is individually filled with the coating components such as the main component and the curing agent in an amount corresponding to the mixing ratio, and the pistons are synchronously activated with the same stroke. Simply by stopping, the paint components are squeezed out from each barrel at a flow rate according to the mixing ratio, so no complicated control is required.

According to a third aspect of the present invention, in synchronization with the filling of the paint into the pressure-feeding cylinder and the pressure-feeding of the paint from the cylinder, the paint components are pressed out from the respective measuring cylinders and the paint components are fed to the cylinder. The filling is performed alternately.

According to the third aspect of the present invention, the paint components are filled in the respective measuring cylinders while the paint is being fed from the pressure feeding cylinders, and the pressure feeding cylinders become empty. At the same time, the paint components are fed from the respective measuring cylinders. Is squeezed out to fill the pressure-feeding cylinder with the paint, so that the pressure-feeding cylinder can alternately perform the filling and the pressure-feeding of the paint continuously without providing an interval, and therefore, the takt time is not wasted.

If each cylinder is arranged in one cylinder unit and the static mixer and the injection type diffusion mixer are mounted on the cylinder unit, they are integrated into an all-in-one unit. Since it is formed, the size and weight of the entire device can be reduced, and the device as a whole can be made more compact.

According to a fifth aspect of the invention, a series of flow passages consisting of a premixer through which the paint mixed with the paint components flows, a pressure-feeding cylinder, an injection type diffusion mixer, and a pipe connecting these are provided from upstream to downstream. While being divided into multiple pieces,
A cleaning system is provided for individually introducing a cleaning fluid into each of the divided flow paths to clean the inside of the flow path.

According to the fifth aspect of the present invention, since each of the divided flow paths can be washed at the same time, even when the main agent and the curing agent for the aqueous two-liquid mixed type paint are supplied from the measuring cylinder, the paint is supplied from the static mixer. Before the two-liquid mixed type paint remaining in the flow path to the tank is cured, it can be easily washed and removed in a short time.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a fluid circuit diagram showing an example of a paint feeding device according to the present invention, FIG. 2 is an external view thereof,
FIG. 3 is an explanatory diagram showing its operation, and FIG. 4 is an explanatory diagram showing a cleaning system.

The paint feeding device 1 shown in FIGS. 1 to 4 is a cartridge in which an aqueous two-component mixed type paint having a main component and a curing agent as paint components is mixed at a predetermined ratio and which is detachably mounted on a coating machine. It is of a type of feeding and filling the paint tank 2 of the formula.

In the paint feeding device 1, the main component and the curing agent fed from the main component supply source S ₁ and the curing agent supply source S ₂ are individually and individually supplied to the cylinder unit 3 in an amount corresponding to the mixing ratio. At the same time, a measuring cylinder 4 that presses out, a static mixer (pipe-line stirring type premixer) 5 that premixes by passing the main agent and the curing agent that have been pressed out from the measuring cylinder 4, and the main agent by the static mixer 5 A pressure-feeding cylinder 6 that feeds the paint in which the curing agent is premixed to the paint tank 2, and the paint is jetted by the fluid pressure of the paint that is sent from the cylinder 6 to the paint tank 2 to make each paint component uniform. An injection type diffusion mixer 7 called a jet dispersion for diffusing is provided.

The cylinder unit 3 is formed in a substantially rectangular parallelepiped block shape, and the barrels B ₁ and B _{2 of} the measuring cylinder 4 are arranged on both sides of the barrel B ₃ of the pressure-feeding cylinder 6 with the barrel B ₃ interposed therebetween. It is formed in parallel. Each of the cylinders 4 and 6 is provided with a paint component and pistons P ₁ , P ₂ and P ₃ that are hydraulically driven when the paint is pressed out.

The measuring cylinder 4 has a piston P ₁
And P ₂ heads 3H side hydraulic chamber 8 of the cylinder unit 3 the boundary of the bottom 3B side is formed in the paint component chamber 9. Further, in the pressure feeding cylinder 6, the head 3H side of the cylinder unit 3 is formed in the paint chamber 10 and the bottom 3B side is formed in the hydraulic oil chamber 11 with the piston P ₃ as a boundary.

Each barrel B ₁ and B of the measuring cylinder 4
₂ is formed in a capacity capable of individually filling each of the main agent and the curing agent in an amount corresponding to the mixing ratio thereof, and the pistons P ₁ and P ₁ for pressing out the main agent and the curing agent filled in the barrels B ₁ and B ₂ respectively. P ₂ has the same stroke length and is adapted to be activated and deactivated synchronously.

That is, the respective extruding capacities with respect to the stroke lengths of the pistons P ₁ and P ₂ are set in accordance with the mixing ratio, and the stroke lengths are the same, so the pistons P ₁ and P ₂ are extruded from the barrels B ₁ and B _2. The flow rate ratio between the main agent and the curing agent is equal to the mixing ratio.

These pistons P ₁ and P ₂ are integrally attached to the beam 13 via the piston rod 12, and the supply pressure of the hydraulic oil supplied to the hydraulic oil chambers 8 of the barrels B ₁ and B ₂ and the paint components. The paint components are supplied to the chamber 9 to be reciprocally driven in the same stroke in synchronization with each other.

Further, the hydraulic oil chamber 8 has an inflow / outflow port 8 for the hydraulic oil.
a is formed, and the paint component inflow port 9 in the paint component chamber 9
And an outlet 9out are formed. Then, the inflow port 9in of each paint component chamber 9 is passed through the main agent valve 14 (hardener valve 15) of the valve device VA ₁ (VA ₂ ) for selectively supplying the main agent (hardener), cleaning air, and cleaning liquid. It is connected to the main agent supply source S ₁ (hardener supply source S ₂ ), and the outlet 9out is connected to the cylinder bottom 3B side of the static mixer 5 via the main agent valve 16 (hardener valve 17) of the valve device VA _3. It is connected to the formed inflow port 5in.

The valve device VA ₃ switches the flow path leading to the static mixer 5, and selectively transfers the main agent and the curing agent extruded from the measuring cylinder 4, the cleaning air, and the cleaning liquid into the static mixer 5. The cleaning liquid discharged from the measuring cylinder 4 can be discharged to the drain while being supplied. Further, the outflow port 5out formed on the cylinder head 3H side of the static mixer 5
Are connected to the pressure-feeding cylinder 6 via the on / off valve 18.

The static mixer 5 repeatedly divides the flow into a flow path in which the main agent and the curing agent flow together.
A number of displacing, polymerizing and mixing elements are arranged along the direction of flow.

The pressure-feeding cylinder 6 includes the pistons P ₁
And P ₂ are formed to have a volume equal to the total supply amount of the main agent and the curing agent that are fed in one stroke, and each piston P that presses out the paint filled in the barrel B _3
3 is reciprocated with the same stroke length as the pistons P ₁ and P ₂ . The piston P ₃ is reciprocally driven by the paint supply pressure supplied to the paint chamber 10 of the barrel B ₃ and the hydraulic oil supply pressure supplied to the hydraulic oil chamber 11.

When the mixing ratio of the main agent and the curing agent is, for example, 5: 2, the main agent and the curing agent are extruded when the pistons P _{1 to} P ₃ of the cylinders 4 and 6 are moved by a unit length. The barrels B _{1 to} B ₃ are designed so that the flow rate ratio of the paint is 5: 2: 7.

The capacity of the barrel B ₃ is arbitrary,
In this example, the size of the paint tank 2 is reduced to about 1/3 so that the paint tank 2 is completely filled with the mixed paint when the piston P ₃ is reciprocated _three times.

A paint inflow port 10in and an outflow port 10out are formed in the paint chamber 10 of the pressure feeding cylinder 6, and a hydraulic oil inflow port 11a is formed in the hydraulic oil chamber 11.
Outlet 10out of the paint chamber 10 is connected to the injection-type diffusion mixer 7 through the paint valve 19 of the valve device VA _4.

This valve device VA ₄ connects the outlet 10out of the pressure-feeding cylinder 6 to the injection type diffusion mixer 7 side and the drain side, and at the same time, selectively supplies the cleaning air and the cleaning liquid to the injection type diffusion mixer 7. It is supposed to be supplied.

The injection type diffusion mixer 7 has a small diameter orifice 7a formed between the inflow port 7in and the outflow port 7out.
In this example, a coaxial opposed type small diameter orifice 7a having a diameter of about 0.2 to 0.5 mm is formed, and the two-liquid mixed type paint supplied from the pressure feeding cylinder 6 at 1 to 10 MPa is used as the orifice 7a. Is jetted when passing through.

As a result, the main agent and the curing agent contained in the paint are atomized and diffused, so that the two-component mixed type paint is more uniformly mixed, and the two-component mixed paint is more than sufficiently mixed. The paint thus applied is fed to the paint tank 2 connected to the paint discharge port 20.

Further, the hydraulic oil supply system D for switching and supplying the hydraulic oil to the cylinders 4 and 6 and collecting the hydraulic oil discharged from the cylinders 4 and 6 includes the hydraulic oil tank 2
The hydraulic oil supply pipe 23 for supplying hydraulic oil at a supply pressure of 1 to 10 MPa by the pump 22 from 1 and the drain 24 for returning the hydraulic oil to the hydraulic oil tank 21 are connected to the measuring cylinder 4 via the switching valve 25. A low-pressure pipe 26 connected to each hydraulic oil chamber 8 and a high-pressure pipe 27 connected to the hydraulic fluid chamber 11 of the pressure feeding cylinder 6 are switchably connected.

The low pressure pipe 26 has a set pressure of 1 MPa.
The following pressure reducing valve 28 is provided so as to maintain the supply pressures of the main agent and the curing agent that are extruded from the measuring cylinder 4 at a low pressure.

The hydraulic oil supply system D supplies / discharges the hydraulic oil to / from each cylinder 4 and 6 at a predetermined timing, and at the same time, controls the opening / closing of the valve devices VA _{1 to} VA ₄ and the on / off valve 18. By doing so, filling / pressurization of the main agent and the curing agent, and filling / pressurization of the paint are performed.

The above is one example of the present invention, and its operation will be described with reference to FIG. First, as shown in FIG. 3A, the hydraulic oil chamber 8 of the measuring cylinder 4 is drained 24
Connected to the main valve 1 of the valve devices VA ₁ and VA _2.
4 and the curing agent valve 15 are opened to fill the respective paint ingredient chambers 9 with the hydrophilic main agent and the hydrophobic curing agent (FIG. 3).
(B)).

Then, the valves of the valve devices VA ₁ and VA ₂ are closed, the main agent valve 16 and the hardening agent valve 17 of the valve device VA ₃ formed at the inflow port 5 in of the static mixer 5 are opened, and the hydraulic oil supply system D The switching valve 25 is operated to connect the hydraulic oil supply pipe 23 to the low pressure pipe 26, and connect the high pressure pipe 27 of the pressure feeding cylinder 6 to the drain 24.

As a result, the working oil is supplied to the measuring cylinder 4 at a low pressure of 1 MPa or less, and the pistons P ₁ and P ₂ synchronously slide integrally on the cylinder bottom 3b side, and the hydrophilic main agent and the hydrophobic hardening are applied. The agents are squeezed out to the static mixer 5 and premixed, and the barrel B _{3 of the} pressure-feeding cylinder 6
It flows in (Fig. 3 (c)).

At this time, since the pistons P ₁ and P ₂ are synchronized, the flow rate ratio of the main agent and the curing agent supplied from the measuring cylinder 4 is always equal to the mixing ratio even if the extrusion speed changes. Then, when the main agent and the curing agent are fed to the static mixer 5 at a constant flow rate ratio according to the mixing ratio, the main agent and the curing agent flow into the pressure-feeding cylinder 6 in a uniformly dispersed state.

Therefore, the pressure-feeding cylinder 6 is filled with the main agent and the curing agent, which are mixed and maintained at a preset mixing ratio, in a uniformly dispersed state. Moreover, since the main agent and the curing agent are supplied at a low pressure, when the main agent and the curing agent pass through the static mixer 5,
When the mixed paint flows into the pressure-feeding cylinder 6, no bubbles are generated.

Since the coating material in which the main agent and the curing agent are evenly dispersed in this way is temporarily stored in the pressure-feeding cylinder, molecular diffusion occurs at the interface between the main agent and the curing agent by utilizing the time. Then, the main component and the curing agent become compatible with each other.

However, since the main agent and the curing agent are hydrophilic and hydrophobic respectively, the diameters of individual droplets are as large as about 0.5 mm at the maximum only by mixing them by the static mixer 5, and they are coated as they are. However, sufficient coating performance cannot be obtained. Therefore, when the filling of the pressure-feeding cylinder 6 is completed (FIG. 3D), the switching valve 25 of the hydraulic oil supply system D is operated to connect the hydraulic oil supply pipe 23 to the high-pressure pipe 27 and The hydraulic oil chamber 8 of the measuring cylinder 4 is connected to the drain 24.

At the same time, the on / off valve 18 is closed to prevent the backflow from the pressure-feeding cylinder 6, and the injection type diffusion mixer 7 is used.
The paint valve 19 of the valve device VA _{4 which} is communicated with is opened. Further, the main agent valve 14 and the hardener valve 15 of the valve devices VA ₁ and VA ₂ for supplying the main agent and the hardener to each measuring cylinder 4 are opened.

As a result, first, the hydraulic oil is supplied to the hydraulic oil chamber 9 of the pressure-feeding cylinder 6 at a high pressure of 1 to 10 MPa,
The two-liquid mixed type paint is delivered from the paint chamber 10 to the injection type diffusion mixer 7 at a pressure equal to the supply pressure of the hydraulic oil (FIG. 3 (e)).

From the inflow port 7in of the injection type diffusion mixer 7 to 1
The two-liquid mixed type paint, which was flowed in at a high pressure of 10 MPa, gradually became a high pressure toward a coaxial opposed type small diameter orifice 7a formed with a diameter of about 0.2 to 0.5 mm, and when passing through the small diameter orifice 7a. It becomes a jet. As a result, the main agent and the curing agent contained in the coating material are diffused in the form of atomized particles, and even the hydrophilic main agent and the hydrophobic curing agent, which are difficult to mix, are uniformly diffused and mixed, and this is mixed with the coating material filling port 20.
Is supplied to the paint tank 2 connected to.

As described above, since the paint components are uniformly mixed and fed in the two stages of premixing-spray diffusion mixing, not only when the paint tank 2 is filled with the paint, but also when the paint is applied to the coating machine. Even when it is directly fed to paint continuously for a long time, each paint component can be fed while being mixed evenly just before the painting machine, and the mixture that has been mechanically mixed beforehand with a blender etc. can be stored. There is no need to keep it.

While the two-liquid mixed type paint is being squeezed out from the pressure-feeding cylinder 6 and being filled in the paint tank 2, the main agent and the curing agent are supplied to the measuring cylinder 4 and are supplied to the respective paint component chambers 9. The main agent and the curing agent are filled (Fig. 3
(E)). At this time, even if the supply pressures of the main agent and the curing agent to each of the measuring cylinders 4 are low, the respective hydraulic oils are released to the drain 24, so that it takes a short time to complete the pressurization of the paint from the pressure-feeding cylinders 6. Can be filled with.

Since the capacity of the pressure-feeding cylinder 6 is the paint tank 21/3, as soon as the extrusion of the mixed paint in the pressure-feeding cylinder 6 is completed, the main agent and the curing agent are immediately squeezed out from each measuring cylinder 4. The procedure of filling the mixed paint into the pressure-feeding cylinder 6 and pressing it again to supply it to the paint tank 2 is repeated 3 times, and the piston P ₃ is reciprocated a total of 3 times. The filling is completed (FIGS. 3B to 3E).

As described above, since the base material and the curing agent are filled in each measuring cylinder 4 while the mixed coating material is being pressed out from the pressure-feeding cylinder 6, when the extrusion of the coating material from the pressure-feeding cylinder 6 is completed. At the same time, it is possible to start filling the pressure-feeding cylinder 6 with the paint.

Therefore, from the pressure-feeding cylinder 6 without providing an interval between the filling of the paint and the pressure-feeding,
These can be done sequentially and alternately, and thus
There is no waste in takt time. After the filling of the mixed paint for one paint tank 2 is completed, the mixed paint can be filled in the pressure-feed cylinder while setting the next empty paint tank 2 in the paint discharge port 20. Therefore, it is possible to shorten the takt time until the paint tank 2 is replaced and filling is started.

Next, when cleaning the paint feeding device 1,
If the valve device VA₁~ VA_FourBy operating
As shown in Figure 4, the flow path is washed from the upstream side to the downstream side by four washings.
Purification system F₁~ F_FourDivide into. Each cleaning system F₁~ F_FourHas
Each valve device VA arranged on the upstream side of each₁~ VA _FourOr
Cleaning liquid and cleaning air are introduced, and the cleaning waste liquid is cleaned.
System F₁~ F_ThreeThen, the downstream valve device VA_Three, VA_FourOr
Is discharged to the drain, and the cleaning system F_FourThen the paint tank 2 contacts
It is discharged from the filling port 20 which is not connected to the outside.

Specifically, the cleaning systems F ₁ and F ₂ clean the flow path from the valve devices VA ₁ and VA ₂ through the respective metering cylinders 4 to the drain of the valve device VA ₃ , and the cleaning system F 1 ₃ is a valve device VA ₃ to a static mixer 5
And the flow path through the pressure-feeding cylinder 6 to the drain of the valve device VA ₄ is cleaned, and the cleaning system F ₄ is connected to the valve device V _4.
From A ₄ through an injection type diffusion mixing vessel 7 to wash the flow path leading to the paint filling port 6.

As described above, the flow passages are provided with a plurality of cleaning systems F ₁ to F _1.
Since it can be divided into _four parts and each can be washed at the same time, the entire paint feeding device 1 can be quickly and surely washed, and the two liquids can be washed at any timing as necessary. Mixed type paint is static mixer 5,
It is possible to prevent the resin from remaining in the pressure-feeding cylinder 6, the injection-type diffusion mixer 7 and the pipe connecting them and hardening.

The hydraulic oil supply system D includes one pump 2
Not only when hydraulic oil is supplied to each of the cylinders 4 and 6 in 2, a system in which a pump for supplying hydraulic oil to the measuring cylinder 4 at low pressure is provided, and a pump for supplying high pressure hydraulic oil to the pressure-feeding cylinder 6 You may arrange the system provided with. Furthermore, it is not limited to the case where the coating material component is pressed out from the measuring cylinder 4 at a low pressure and the two-liquid mixing type coating material is pressed out from the pressure-feeding cylinder 6 at a high pressure, and may be supplied at a constant pressure of about 1 MPa.

Further, the piston rod (not shown) of the pressure feeding cylinder 6 is replaced with the piston rod R _{1 of the} measuring cylinder 4.
If it is integrally attached to the beam 13 together with R ₂ and R ₂ , all the pistons P _{1 to} P ₃ can be synchronized and slid with the same stroke.

According to this, when the pistons P _{1 to} P ₃ retreat in synchronization with each other, the main agent and the curing agent are delivered from each metering cylinder 4 at a predetermined flow rate ratio corresponding to the mixing ratio, and at the same time, the pressure feeding cylinder. 6 is filled with the mixed paint. Also,
When the pistons P _{1 to} P ₃ move forward synchronously, the mixed paint is squeezed out from the pressure-feeding cylinder 6 to the paint tank 2, and at the same time, the main agent and the curing agent are fed to the respective measuring cylinders 4. In this way, the main agent and the curing agent are mixed at a predetermined mixing ratio only by synchronizing the pistons P _{1 to} P ₃ and advancing and retreating with the same stroke, so that the flow rate control and the timing control thereof become easier.

Further, in the above description, the two-component mixed type paint consisting of the main agent and the curing agent has been described, but any two or more kinds of coating components such as a plurality of main agents and curing agents, a main agent and additives are mixed. It can be applied to multi-component paints.

Furthermore, the paint feeding device 1 of the present invention is
The present invention is not limited to the case where the paint is filled in the paint tank 2 that is equipped or installed in the coating machine, and can also be used as a paint supply device that directly supplies the paint to the coating machine that performs the coating while receiving the supply of the paint.

[0069]

As described above, according to the present invention, the paint components such as the base resin and the curing agent are individually and simultaneously squeezed out from the measuring cylinder individually and simultaneously by the amount corresponding to the mixing ratio. Is sent to the premixer at a constant flow rate according to the mixing ratio and is evenly dispersed, and after the paint is filled in the pump cylinder, it is sprayed when it is pumped to the coating machine or paint tank. Since the paint components with large particle diameters are atomized and diffused by the type diffusion mixer, even the difficult-to-mix hydrophilic main components and hydrophobic curing agents are evenly mixed into the paint tank. It has a very excellent effect of being able to do.

As described above, since the paint components are uniformly mixed and fed in the two stages of premixing-spray-diffusion mixing, not only when the paint tank is filled with the paint but also when the paint is applied to the coating machine. Even when directly feeding and coating continuously for a long time, it is not necessary to store the mechanical mixture beforehand with a blender etc., and each paint component is evenly mixed just before the painting machine or paint tank. There is an effect that it can be sent while.

Further, since the coating material components such as the base material and the curing agent are squeezed out from the measuring cylinder by the amount corresponding to the mixing ratio thereof, there is an effect that the troublesome flow rate control is completely unnecessary. At this time, for example, as a measuring cylinder, a piston that is synchronously started and stopped with the same stroke is provided, and a coating component such as a main agent and a curing agent having a volume that can be individually filled in a quantity corresponding to the mixing ratio is provided. If the barrel is used, the paint components can be squeezed out at a flow rate ratio corresponding to the mixing ratio by simply moving the pistons in synchronization, and the piston drive control can be extremely simplified.

Furthermore, in synchronization with the filling of the paint into the pressure-feeding cylinder and the feeding of the paint from the cylinder, the press-out of the paint component from each measuring cylinder and the filling of the paint component into the cylinder are alternately performed. , While each pumping cylinder is pumping paint, each metering cylinder is filled with the paint component, and at the same time the pumping cylinder is emptied, at the same time, each metering cylinder presses out the paint component to fill the pumping cylinder with paint. Therefore, the pressure-feeding cylinder can continuously and alternately perform the filling and the pressure-feeding without providing an interval between the filling and the pressure-feeding of the paint. Excellent efficiency.

If each cylinder is arranged in one cylinder unit and the premixer and the diffusion mixer are mounted in the cylinder unit, these are integrally formed into an all-in-one type, so that the entire apparatus is formed. There is also an advantage that the size and weight can be reduced and the overall size can be made more compact.

Further, a series of flow paths consisting of a premixer, a pressure-feeding cylinder, an injection type diffusion mixer, and a pipe connecting them are divided into a plurality of parts from upstream to downstream, and each of the divided flow paths. If the cleaning fluid is individually introduced into, each flow path can be cleaned at the same time, so even when supplying the main agent and curing agent of the aqueous two-liquid mixed paint from the measuring cylinder,
There is also an effect that the two-liquid mixed type paint remaining in the flow path from the premixer to the paint tank can be easily and reliably washed and removed in a short time before being cured.

[Brief description of drawings]

FIG. 1 is a fluid circuit diagram showing a paint feeding device according to the present invention.

FIG. 2 is an external view thereof.

FIG. 3 is an explanatory diagram showing the operation.

FIG. 4 is an explanatory view showing the cleaning system.

[Explanation of symbols]

1 ... Paint feeding device 2 ... Paint tank 3 ... Cylinder unit 4 ......... Measuring cylinder 5 ......... Pipe mixer 6 ... Cylinder for pressure feeding 7 ......... Injection type diffusion mixer B₁~ B_Three………barrel P₁~ P_Three………piston F₁~ F_Four……… Cleaning system

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Ichimura             Trini, 1-9 Kakimoto-cho, Toyota City, Aichi Prefecture             Within Tee Industry Co., Ltd. (72) Inventor Takao Ueno             Trini, 1-9 Kakimoto-cho, Toyota City, Aichi Prefecture             Within Tee Industry Co., Ltd. (72) Inventor Katsuhiro Ishikawa             Trini, 1-9 Kakimoto-cho, Toyota City, Aichi Prefecture             Within Tee Industry Co., Ltd. F-term (reference) 4F033 QA01 QB18 QD02 QD11

Claims (5)

[Claims] 1. A paint feed for feeding a paint prepared by mixing two or more kinds of paint components at a predetermined ratio to a paint machine or a paint tank (2) equipped or detachably attached to the paint machine. In the apparatus, the paint components are premixed by individually and simultaneously pressing each of the paint components in an amount corresponding to the mixing ratio, and by passing the paint components extruded from the cylinder (4). A pipe-stirring type premixer (5), a pressure-feeding cylinder (6) for pressure-feeding the paint premixed with the paint components in the premixer (5) to the coater or paint tank (2), A paint feeding device characterized by comprising a jet type diffusion mixer (7) for jetting the paint by fluid pressure of the paint sent from a cylinder (6) to uniformly diffuse each paint component. 2. The measuring cylinder (4) is provided with two or more barrels (B ₁ , B ₂ ) for individually filling the paint components in amounts according to their mixing ratios, respectively. _1, B ₂₎ each piston out dividing the filled paint component (P _{1, P 2)} is, while having the same stroke length, paint delivery device of synchronously activated and claim 1, wherein for stopping . 3. Pressing out paint components from each of said measuring cylinders (4) and said cylinders in synchronism with the filling of paint into said pumping cylinder (6) and the pumping of paint from said cylinder (6). The paint feeding device according to claim 1, wherein the paint components are alternately filled in (4). 4. The cylinders (4, 6) are arranged in one cylinder unit (3), and the cylinder unit (3) is provided with the premixer (5) and an injection-type diffusion mixer (5). 7. The paint feeding device according to claim 1, which is equipped with 7). 5. A series of flow paths consisting of the premixer (5), a pressure-feeding cylinder (6), an injection type diffusion mixer (7), and a pipe connecting them, through which the paint mixed with each paint component flows. A cleaning system (F _{1 to} F ₄ ) that is divided into a plurality of parts from the upstream side to the downstream side, and separately introduces a cleaning fluid into each of the divided flow paths to clean the inside of the flow path. Item 4. The paint feeder according to any one of items 1 to 4.