JP3927026B2 - Paint feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a paint machine prepared by mixing two or more kinds of paint components at a predetermined ratio, in particular, an aqueous two-component mixed paint comprising a main agent and a curing agent. The present invention relates to a paint feeding device that feeds a paint tank.
[0002]
[Prior art]
In recent years, from the viewpoint of environmental protection on a global scale, the regulations for organic solvents discharged in the painting process and the VOC regulations for paints have increased, and the paint industry has developed water-based paints that do not use organic solvents in order to meet such demands. The market size is also expanding.
[0003]
In the painting of automobile bodies, among the undercoat, intermediate coat, and topcoat, the undercoat was originally applied by electrodeposition coating with water-based paint. Most of the intermediate coats that conventionally used organic solvent-based paints are now used. Switching to water-based paint and powder coating.
[0004]
In addition, most of the base coats are being replaced by water-based paints and powder paints, except for some special colors, but only clear coats that require high-quality quality have the appearance, weather resistance, water resistance, There is no water-based paint that satisfies advanced coating quality in terms of chemical resistance, acid rain resistance, scratch resistance, etc., and there is no choice but to use organic solvent-based one-pack or two-pack paints Met.
[0005]
Recently, however, an aqueous two-component paint that uses a mixture of the main agent and a curing agent has been developed as a water-based clear coat with a strong coating that has the same physical properties as organic solvent-based two-component paints. .
This water-based two-component paint is a mixture of a water-soluble or water-dispersible polyol having a hydroxyl group as a base resin and a curing agent mainly composed of a water-dispersible polyisocyanate to crosslink and cure. It is.
[0006]
[Problems to be solved by the invention]
However, this type of aqueous two-component paint is water-dispersible polyol, which is the main component, and hydrophilic, whereas polyisocyanate, which is the curing agent, is hydrophobic, so it separates like water and oil. There was a problem that it was easy and it was difficult to mix uniformly.
[0007]
For this reason, it is designed to supply the machine with mechanical stirring and mixing in advance with a blender, etc., but since the main agent and the curing agent start the curing reaction at the same time as stirring and mixing, it is continuous as in automobile coating. When painting for a long time, the paint gradually hardens while it is being supplied, the paint viscosity changes and the paint quality becomes unstable, or the paint remaining in the paint supply piping hardens. There was a risk of clogging, or being discharged from a coating machine and adhering to the surface of the coating film, resulting in a coating failure referred to as blisters.
[0008]
On the other hand, organic solvent-based two-component mixed paints can be mixed uniformly if a static mixer is installed in the paint supply flow path. Although it was possible to supply paint while water-based two-component paint was difficult to mix as described above, even if a static mixer was installed in the paint supply flow path, the paint could be mixed evenly. Film performance could not be obtained.
[0009]
In addition, when the mixing ratio of the main agent and the curing agent changes, the physical properties of the mixed paint also change. Therefore, to maintain uniform coating quality, it is necessary to accurately control the mixing ratio. On the other hand, it is desirable that the control is extremely simple, it does not get in the way when installed on the painting line, and the equipment cost and running cost are low.
[0010]
Therefore, the present invention is capable of feeding even a paint in which the main agent and the curing agent are difficult to mix, such as an aqueous two-component mixed paint, to a coating machine, a paint tank, etc. while uniformly mixing them, and is extremely controlled. It is a technical problem to provide a simple, small and inexpensive paint feeding device.
[0011]
[Means for Solving the Problems]
In order to solve this problem, the invention of claim 1 is directed to a coating machine or a paint tank that is mounted on or removable from a coating machine by applying a paint prepared by mixing two or more kinds of paint components at a predetermined ratio. In the paint feeding device that feeds the paint components, a pre-mixing is performed by passing the paint components that are individually and simultaneously compressed in an amount corresponding to the mixing ratio of the paint components and the paint components that are discharged from the cylinders. A line agitating type premixer, a pressure feeding cylinder for pressure-feeding the paint premixed with the paint component in the premixer to the paint machine or a paint tank, and fluid pressure of the paint pressure fed from the cylinder An injection type diffusion mixer is provided that sprays the paint to uniformly diffuse each paint component.
[0012]
The case where the main agent and the curing agent that are the paint components of the aqueous two-component mixed paint are mixed and fed using the invention of claim 1 will be described. The main agent and the curing agent are supplied from the measuring cylinder according to the mixing ratio. The respective paint components are pumped out individually and simultaneously, and each paint component is fed to the premixer at a constant flow rate according to the mixing ratio and premixed, whereby each paint component is uniformly dispersed.
[0013]
Therefore, the paint mixed by the premixer is filled in the cylinder for pressure feeding in a state where each paint component is uniformly dispersed, and the mixing ratio is always maintained constant.
[0014]
Since the paint in which the paint components are uniformly dispersed in this manner is temporarily stored in the cylinder for pumping, molecular diffusion proceeds at the boundary surface between the paint components using the time, and the paint components Will become familiar.
[0015]
However, even though it is said that it is uniformly dispersed at this point, the particle size of the droplets of each paint component is still relatively large, and sufficient coating performance cannot be obtained even if it is applied as it is.
[0016]
Therefore, when the paint is pumped from the cylinder for pumping to the coating machine or paint tank, the paint is jetted by the injection-type diffusion mixer, and each paint component having a large particle size is atomized and diffused. Even difficult-to-mix paint components such as the main agent and hydrophobic curing agent are mixed uniformly.
[0017]
In this way, each paint component is uniformly mixed and fed in the two stages of premixing-spray diffusion mixing, so of course when filling the paint tank, the paint is fed directly to the coating machine. Even when painting continuously for a long time, it is possible to feed each paint component while mixing evenly just before the coating machine, and it is necessary to store what was mechanically mixed with a blender in advance. There is no.
[0018]
According to a second aspect of the present invention, each measuring cylinder includes two or more barrels that individually fill the paint component in an amount corresponding to the mixing ratio, and each piston that presses out the paint component filled in each barrel. Have the same stroke length and can be started and stopped synchronously.
[0019]
According to the second aspect of the present invention, paint components such as the main agent and the curing agent are individually filled in the barrels in an amount corresponding to the mixing ratio, and each piston is started and stopped synchronously with the same stroke. Thus, since the paint component is discharged from each barrel at a flow rate corresponding to the mixing ratio, no troublesome control is required.
[0020]
In the invention of claim 3, in synchronism with the filling of the paint into the pumping cylinder and the feeding of the paint from the cylinder, the discharge of the paint component from each measuring cylinder and the filling of the paint component into the cylinder are alternately performed. To do.
[0021]
According to the third aspect of the present invention, the paint component is filled in each measuring cylinder while the paint is being pumped from the pressure feeding cylinder, and at the same time the paint cylinder is emptied, the paint component is pressed out from each metering cylinder. Since the paint is filled in the pressure feeding cylinder, the pressure feeding cylinder can alternately perform the filling and pressure feeding of paint without alternately providing an interval, and therefore there is no waste in tact time.
[0022]
Further, as in the invention of claim 4, if each cylinder is arranged in one cylinder unit and a static mixer and an injection type diffusion mixer are mounted on the cylinder unit, they are formed in an all-in-one united together. As a result, the entire apparatus can be reduced in size and weight, and the overall apparatus becomes more compact.
[0023]
In the invention of claim 5, a plurality of series of flow paths including a premixer in which paints mixed with each paint component flow, a cylinder for pressure feeding, an injection type diffusion mixer, and a pipe connecting them are provided from upstream to downstream. And a cleaning system that individually introduces a cleaning fluid into each of the divided flow paths and cleans the flow paths.
[0024]
According to the fifth aspect of the present invention, since the divided flow paths can be simultaneously cleaned, even when the main agent and the curing agent of the aqueous two-component mixed paint are supplied from the measuring cylinder, the static mixer leads to the paint tank. Before the two-component mixed paint remaining in the flow path is cured, it can be easily washed and removed in a short time.
[0025]
DETAILED DESCRIPTION OF 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.
[0026]
1 to 4 is a cartridge-type paint that mixes a water-based two-component paint having a main component and a curing agent as paint components at a predetermined ratio, and is detachably mounted on a coating machine. It is of a type that is fed to the tank 2 and filled.
[0027]
This paint feeding device 1 is connected to the cylinder unit 3 with a main agent supply source S. ₁ And curing agent source S ₂ A main cylinder and a curing agent fed from the metering cylinder 4 that individually and simultaneously pressurize each amount corresponding to the mixing ratio thereof, and a premixing by passing the main agent and the curing agent extruded from the metering cylinder 4 A static mixer (pipe agitation type premixer) 5, a pressure feeding cylinder 6 for feeding the paint preliminarily mixed with the main agent and the curing agent to the paint tank 2, and the cylinder 6 to the paint tank 2. There is provided an injection type diffusion mixer 7 called a jet dispersion for uniformly diffusing each paint component by jetting the paint by the fluid pressure of the paint sent to the surface.
[0028]
The cylinder unit 3 is formed in a substantially rectangular parallelepiped block shape, and the barrel B of the measuring cylinder 4 ₁ And B ₂ Is the barrel B of the cylinder 6 for pressure feeding ₃ Are formed in parallel to each other so as to be arranged on both sides of the sheet.
Also, each cylinder 4 and 6 has a piston P that is hydraulically driven when pressure is applied to the paint component and paint. ₁ , P ₂ And P ₃ It has.
[0029]
The measuring cylinder 4 has a piston P ₁ And P ₂ The cylinder unit 3 is formed with a hydraulic oil chamber 8 on the head 3H side and a paint component chamber 9 on the bottom 3B side.
Moreover, the cylinder 6 for pressure feeding is piston P ₃ The cylinder unit 3 is formed in the paint chamber 10 on the head 3H side and the hydraulic oil chamber 11 on the bottom 3B side.
[0030]
Each barrel B of the measuring cylinder 4 ₁ And B ₂ Is formed in a capacity capable of individually filling the main agent and the curing agent in an amount corresponding to the mixing ratio, and each barrel B ₁ And B ₂ Each piston P that presses out the main agent and curing agent filled in ₁ And P ₂ Have the same stroke length and can be started and stopped synchronously.
[0031]
That is, each piston P ₁ And P ₂ Since each extruding capacity with respect to the stroke length is set according to the mixing ratio and the stroke length is the same, each barrel B ₁ And B ₂ The flow rate ratio of the main agent and the curing agent extruded from is equal to the mixing ratio.
[0032]
Each of these pistons P ₁ And P ₂ Is integrally attached to the beam 13 via the piston rod 12 and the barrel B ₁ And B ₂ The hydraulic oil supply pressure supplied to the hydraulic oil chamber 8 and the paint component supply pressure to the paint component chamber 9 are reciprocally driven in the same stroke in synchronization with each other.
[0033]
The hydraulic oil chamber 8 has a hydraulic oil inflow / outlet 8a, and the paint component chamber 9 has a paint component inlet 9in and an outlet 9out.
The inlet 9in of each paint component chamber 9 is a valve device VA that selectively supplies a main agent (curing agent), cleaning air, and cleaning liquid. ₁ (VA ₂ ) Main agent supply source S through main agent valve 14 (curing agent valve 15). ₁ (Hardener supply source S ₂ The outlet 9out is connected to the valve device VA. ₃ The main agent valve 16 (hardener valve 17) is connected to an inflow port 5in formed on the cylinder bottom 3B side of the static mixer 5.
[0034]
Valve device VA ₃ Switches the flow path leading to the static mixer 5 and selectively supplies the main agent and the curing agent, the cleaning air, and the cleaning liquid pressed out from the measuring cylinder 4 into the static mixer 5, and the measuring cylinder 4 The cleaning liquid discharged from the tank can be discharged to the drain.
An outflow port 5out formed on the cylinder head 3H side of the static mixer 5 is connected to the pressure feeding cylinder 6 via an on / off valve 18.
[0035]
The static mixer 5 is formed by arranging a number of elements along the flow direction in the flow path where the main agent and the curing agent are joined and repeatedly dividing, replacing, and superposing and mixing the flow.
[0036]
The cylinder 6 for pressure feeding is the piston P ₁ And P ₂ Is formed in a capacity equal to the total supply amount of the main agent and the curing agent fed when one stroke is made, and the barrel B ₃ Each piston P that presses out the paint filled in ₃ Each piston P ₁ And P ₂ It is designed to reciprocate with the same stroke length.
And this piston P ₃ Barrel B ₃ Are reciprocally driven by the paint supply pressure supplied to the paint chamber 10 and the hydraulic oil supply pressure supplied to the hydraulic oil chamber 11.
[0037]
In addition, when the mixing ratio of the main agent and the curing agent is, for example, 5: 2, each piston P of each cylinder 4 and 6 ₁ ~ P ₃ Each barrel B so that the flow rate ratio of main agent: curing agent: paint is 5: 2: 7 when it is moved by a unit length ₁ ~ B ₃ Is designed.
[0038]
Barrel B ₃ However, in this example, the piston P ₃ The paint tank 2 is formed as small as about 1/3 so that the paint tank 2 can be filled with the mixed paint when it is reciprocated three times.
[0039]
A paint inflow port 10 in and an outflow port 10 out are formed in the paint chamber 10 of the cylinder for pressure feeding 6, and an inflow / outlet port 11 a for hydraulic oil is formed in the hydraulic oil chamber 11. The outlet 10out of the paint chamber 10 is a valve device VA. ₄ The spray type diffusion mixer 7 is connected through a paint valve 19.
[0040]
This valve device VA ₄ Is configured to selectively connect the outlet 10out of the cylinder 6 for pressure feeding to the injection diffusion mixer 7 side and the drain side, and to selectively supply cleaning air and cleaning liquid to the injection diffusion mixer 7.
[0041]
In the injection-type diffusion mixer 7, a small-diameter orifice 7a is formed between the inlet 7in and the outlet 7out. In this example, a coaxial opposed small-diameter orifice 7a formed to have a diameter of about 0.2 to 0.5 mm is formed, and the two-component mixed-type paint supplied from the pumping cylinder 6 at 1 to 10 MPa is the orifice 7a. It will be jetted when passing through.
[0042]
As a result, the main agent and the curing agent contained in the paint are atomized and diffused, so that the two-component mixed paint is more uniformly mixed. Thus, the paint mixed sufficiently in this way Is fed to the paint tank 2 connected to the paint discharge port 20.
[0043]
The hydraulic oil supply system D for switching and supplying hydraulic oil to the cylinders 4 and 6 and collecting the hydraulic oil discharged from the cylinders 4 and 6 is 1 to 10 MPa from the hydraulic oil tank 21 by the pump 22. A hydraulic oil supply pipe 23 that supplies hydraulic oil at the supply pressure and a drain 24 that returns the hydraulic oil to the hydraulic oil tank 21 are connected to the hydraulic oil chambers 8 of the measuring cylinder 4 via the switching valve 25. A low-pressure pipe 26 and a high-pressure pipe 27 communicated with the working fluid chamber 11 of the pressure-feeding cylinder 6 are switchably connected.
[0044]
In addition, a pressure reducing valve 28 having a set pressure of 1 MPa or less is interposed in the low pressure pipe 26 so as to maintain the supply pressure of the main agent and the curing agent discharged from the measuring cylinder 4 at a low pressure.
[0045]
The hydraulic oil is supplied / discharged to each cylinder 4 and 6 by the hydraulic oil supply system D at a predetermined timing, and at the same time, each valve device VA is supplied. ₁ ~ VA ₄ By controlling the opening and closing of the on / off valve 18, the main agent and the curing agent are filled / extruded and the paint is filled / extruded.
[0046]
The above is an example of the present invention, and its operation will be described next with reference to FIG.
First, as shown in FIG. 3A, the hydraulic oil chamber 8 of the measuring cylinder 4 is connected to the drain 24, and the valve device VA. ₁ And VA ₂ The main agent valve 14 and the curing agent valve 15 are opened, and each of the paint component chambers 9 is filled with a hydrophilic main agent and a hydrophobic curing agent (FIG. 3B).
[0047]
And the valve device VA ₁ And VA ₂ The valve device VA formed at the inlet 5in of the static mixer 5 is closed. ₃ The main oil valve 16 and the hardener valve 17 are opened, the switching valve 25 of the hydraulic oil supply system D is operated to connect the hydraulic oil supply pipe 23 to the low pressure pipe 26, and the high pressure pipe 27 of the pumping cylinder 6 is connected to the drain 24. Connecting.
[0048]
As a result, hydraulic oil is supplied to the measuring cylinder 4 at a low pressure of 1 MPa or less, and the piston P ₁ And P ₂ Are synchronously slid to the cylinder bottom 3b side, the hydrophilic main agent and the hydrophobic curing agent are pressed out to the static mixer 5 and premixed, and the barrel B of the cylinder 6 for pressure feeding ₃ It flows into the inside (FIG. 3C).
[0049]
At this time, piston P ₁ And P ₂ Therefore, even if the extrusion speed changes, the flow ratio of the main agent and the curing agent supplied from the metering cylinder 4 is always equal to the mixing ratio.
When the main agent and the curing agent are fed to the static mixer 5 at a constant flow 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.
[0050]
Therefore, the main agent and the curing agent, which are mixed while being maintained at a preset mixing ratio, are filled in the pressure feeding cylinder 6 in a uniformly dispersed state. In addition, since the main agent and the curing agent are supplied at a low pressure, bubbles do not occur when the main agent and the curing agent pass through the static mixer 5 or when the mixed paint flows into the pressure feeding cylinder 6. .
[0051]
Since the paint in which the main agent and the curing agent are uniformly dispersed in this way is temporarily stored in the pumping cylinder, molecular diffusion proceeds at the boundary surface between the main agent and the curing agent using the time, and the main agent And the curing agent becomes familiar with each paint component.
[0052]
However, since the main agent and the curing agent are hydrophilic and hydrophobic, respectively, the diameter of each droplet is as large as about 0.5 mm at the maximum by just mixing with the static mixer 5, and it is sufficient to paint as it is. The film performance cannot be obtained.
Therefore, when the filling into the pressure feeding cylinder 6 is completed (FIG. 3 (d)), 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. The hydraulic oil chamber 8 of the measuring cylinder 4 is connected to the drain 24.
[0053]
At the same time, the on / off valve 18 is closed to prevent the backflow from the pressure feeding cylinder 6, and the valve device VA communicated with the injection type diffusion mixer 7. ₄ The paint valve 19 is opened.
Further, a valve device VA for supplying a main agent and a curing agent to each measuring cylinder 4 ₁ And VA ₂ The main agent valve 14 and the curing agent valve 15 are opened.
[0054]
As a result, first, the hydraulic oil is supplied to the hydraulic oil chamber 9 of the cylinder 6 for pressure feeding at a high pressure of 1 to 10 MPa, and the hydraulic oil is supplied from the paint chamber 10 to the injection type diffusion mixer 7 at a pressure equal to the supply pressure of the hydraulic oil. The liquid mixed paint is sent out (FIG. 3E).
[0055]
The two-component mixed-type paint flowed from the inlet 7in of the injection-type diffusion mixer 7 at a high pressure of 1 to 10 MPa is directed toward the coaxial opposed small-diameter orifice 7a formed to have a diameter of about 0.2 to 0.5 mm. The pressure gradually becomes high and is jetted when passing through the small-diameter orifice 7a.
As a result, since the main agent and the curing agent contained in the paint are diffused in the atomized state, even the hydrophilic main agent and the hydrophobic curing agent that are difficult to mix are uniformly diffused and mixed, and this is connected to the paint filling port 20. Supplied to the paint tank 2.
[0056]
In this way, since the respective paint components are uniformly mixed and fed in the two stages of premixing and spray diffusion mixing, not only when the paint tank 2 is filled with paint, but also the paint is sent directly to the coating machine. Even when painting continuously for a long time, it is possible to feed each paint component while mixing evenly just before the coating machine, and it is necessary to store the mechanically mixed material beforehand by blender etc. There is no.
[0057]
The main agent and the curing agent are supplied to the measuring cylinder 4 while the two-component mixed type paint is pressed out from the pumping cylinder 6 and filled in the paint tank 2, and the main agent and the curing agent are supplied to the respective paint component chambers 9. The agent is filled (FIG. 3 (e)).
At this time, even if the supply pressure of the main agent and the curing agent to each metering cylinder 4 is low, each hydraulic oil is released to the drain 24, so that it takes a short time to finish the pressure of the paint from the pressure feeding cylinder 6. Can be filled with.
[0058]
Further, 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 feed cylinder 6 is completed, the main agent and the curing agent are immediately pressed out from each measuring cylinder 4, and the mixed paint is obtained. Is filled in the cylinder 6 for pressure feeding, the pressure is again pumped out, and the procedure for supplying the cylinder to the paint tank 2 is repeated three times. ₃ 3 in total, the filling of the mixed paint into the paint tank 2 is completed (FIGS. 3B to 3E).
[0059]
Thus, since the main agent and the curing agent are filled in each measuring cylinder 4 while the mixed paint is being pressed out from the pressure feeding cylinder 6, the pressure feeding is completed at the same time as the extrusion of the paint from the pressure feeding cylinder 6 is completed. The cylinder 6 can be filled with paint.
[0060]
Therefore, these can be continuously performed alternately without providing an interval between the filling of the paint and the pressure feeding from the pressure feeding cylinder 6, and therefore, the tact time is not wasted.
In addition, after the filling of the mixed paint in one paint tank 2 is completed, the mixed paint can be filled into the pressure feeding cylinder while the empty paint tank 2 waiting next is set in the paint discharge port 20. Therefore, the tact time until the paint tank 2 is replaced and filling is started can be shortened.
[0061]
Next, when cleaning the paint feeding device 1, the valve device VA is used. ₁ ~ VA ₄ As shown in FIG. 4, the four cleaning systems F are moved from the upstream side to the downstream side as shown in FIG. ₁ ~ F ₄ Divide into
Each cleaning system F ₁ ~ F ₄ Each valve device VA arranged on the upstream side of each ₁ ~ VA ₄ The cleaning liquid and cleaning air are introduced from the ₁ ~ F ₃ Then, the downstream valve device VA ₃ , VA ₄ Is discharged from the drain to the cleaning system F ₄ Then, the paint tank 2 is discharged from the filling port 20 to which it is not connected.
[0062]
Specifically, cleaning system F ₁ And F ₂ The valve device VA ₁ And VA ₂ Valve device VA through each measuring cylinder 4 ₃ Cleaning the flow path leading to the drain ₃ The valve device VA ₃ Valve device VA through the static mixer 5 and the pressure feeding cylinder 6 ₄ Cleaning the flow path leading to the drain ₄ The valve device VA ₄ Then, the flow path from the injection diffusion mixer 7 to the paint filling port 6 is washed.
[0063]
Thus, the flow path is divided into a plurality of cleaning systems F. ₁ ~ F ₄ Since each of them can be washed at the same time, the entire coating material feeding device 1 can be washed quickly and reliably, and the two-component mixing can be performed by washing at any timing as required. It is possible to prevent the mold paint from remaining in the static mixer 5, the pressure feeding cylinder 6, the injection type diffusion mixer 7, and the pipes connecting these to cure.
[0064]
The hydraulic oil supply system D is not limited to the case where the hydraulic oil is supplied to each of the cylinders 4 and 6 with one pump 22, and the system provided with a pump for supplying hydraulic oil to the measuring cylinder 4 at a low pressure, A system in which a pump for supplying high-pressure hydraulic oil to the cylinder 6 may be provided in parallel.
Furthermore, it is not limited to the case where the paint component is pressed out from the metering cylinder 4 at a low pressure and the two-component mixed paint is pressed out from the pumping cylinder 6 at a high pressure, and may be supplied at a constant pressure of about 1 MPa.
[0065]
Further, the piston rod (not shown) of the pressure feeding cylinder 6 is replaced with the piston rod R of the measuring cylinder 4. ₁ And R ₂ If it is attached to the beam 13 together, all pistons P ₁ ~ P ₃ Can also be slid with the same stroke.
[0066]
According to this, each piston P ₁ ~ P ₃ When the reverse moves synchronously, the main agent and the curing agent are sent out from each metering cylinder 4 at a predetermined flow rate ratio corresponding to the mixing ratio, and at the same time, the mixed paint is filled in the pressure feeding cylinder 6.
Each piston P ₁ ~ P ₃ When the ink advances in synchronism, the mixed paint is pressed out from the pressure feed cylinder 6 to the paint tank 2 and at the same time, the main agent and the curing agent are fed to each metering cylinder 4.
Thus, each piston P ₁ ~ P ₃ Since the main agent and the curing agent are mixed at a predetermined mixing ratio only by synchronizing and advancing and retreating with the same stroke, the flow rate control and timing control become easier.
[0067]
Furthermore, in the above description, the two-component mixed paint composed of the main agent and the curing agent has been described. However, any multi-component mixing that mixes two or more kinds of paint components such as a plurality of main agents and a curing agent, and a main agent and an additive. Applicable to mold paints.
[0068]
Furthermore, the paint feeding device 1 of the present invention is not limited to the case where the paint tank 2 installed or installed in the coating machine is filled with the paint, but directly supplies the paint to the coating machine that performs coating while receiving the supply of the paint. It can also be used as a paint supply device.
[0069]
【The invention's effect】
As described above, according to the present invention, the paint components such as the main agent and the curing agent are separately and simultaneously pressed out from the measuring cylinder in an amount corresponding to the mixing ratio. It is fed to the premixer at a constant flow ratio and dispersed uniformly. After the paint is filled in the pressure feed cylinder and then pumped to the coating machine or paint tank, the paint is sprayed by the injection-type diffusion mixer. Since each paint component having a large particle size is atomized and diffused by being jetted, it is possible to fill the paint tank in a uniformly mixed state even with difficult-to-mix paint components such as a hydrophilic main agent and a hydrophobic curing agent. Very effective.
[0070]
In this way, each paint component is uniformly mixed and fed in the two stages of premixing-spray diffusion mixing, so of course when filling the paint tank, the paint is fed directly to the coating machine. Even when painting continuously for a long time, it is not necessary to store the mechanically mixed material in advance with a blender, etc., and each paint component is sent while being mixed evenly just before the coating machine or paint tank. There is an effect that can be paid.
[0071]
In addition, since paint components such as the main agent and the curing agent are discharged from the measuring cylinder by an amount corresponding to the mixing ratio, there is an effect that no troublesome flow rate control is required.
At this time, for example, as a measuring cylinder, it is provided with a piston that is started and stopped synchronously with the same stroke, and a volume that can be individually filled with paint components such as a main agent and a curing agent according to the mixing ratio. If a barrel is used, each paint component can be pressed out at a flow rate ratio corresponding to the mixing ratio by simply moving the piston in synchronism, and the piston drive control is extremely simplified.
[0072]
Furthermore, in synchronism with the filling of the paint into the pumping cylinder and the feeding of the paint from the cylinder, the pumping of the paint component from each measuring cylinder and the filling of the paint component into the cylinder are alternately performed. Each metering cylinder is filled with the paint component while the paint is being pumped from the cylinder, and at the same time the pump cylinder is empty, the paint component is pushed out from each metering cylinder and the pump cylinder is filled with the paint. The cylinder for pumping does not need to provide an interval between the filling and the pumping of the paint, and the filling and the pumping can be alternately performed continuously. Therefore, the tact time is not wasted and the working efficiency is excellent. .
[0073]
Then, if each cylinder is arranged in one cylinder unit and a premixer and a diffusion mixer are mounted on the cylinder unit, they are formed into an all-in-one type in which they are integrally arranged. There is also an advantage that the weight can be reduced and the whole can be made more compact.
[0074]
Further, a series of flow paths composed of a premixer, a pressure feeding cylinder, an injection type diffusion mixer, and piping connecting them are divided into a plurality of channels from the upstream to the downstream, and a washing fluid is divided into each of the divided flow paths. Since each of the flow paths can be washed at the same time, even if the main agent and curing agent of the aqueous two-component mixed paint are supplied from the measuring cylinder, they remain in the flow path from the premixer to the paint tank. There is also an effect that the two-component mixed paint to be cured can be easily and reliably removed in a short time before curing.
[Brief description of the 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 feeder
2 ... Paint tank
3 ... Cylinder unit
4 ... Weighing cylinder
5 ... Pipe stirrer type premixer
6 ......... Cylinder for pressure feeding
7 ... …… Diffusion type diffusion mixer
B ₁ ~ B ₃ ………barrel
P ₁ ~ P ₃ ………piston
F ₁ ~ F ₄ ……… Cleaning system

Claims (5)

In the paint feeding device for feeding a paint prepared by mixing two or more kinds of paint components in a predetermined ratio to a coating machine or a paint tank (2) mounted on or removable from the paint machine, the paint A metering cylinder (4) that individually and simultaneously presses components according to their mixing ratios, and a pipe-stirring type preliminary for premixing by passing the paint component that has been pressed out from the cylinder (4) From the mixer (5), the pressure feeding cylinder (6) for pressure-feeding the paint premixed with the paint component in the premixer (5) to the paint machine or paint tank (2), and the cylinder (6) A paint feeding apparatus comprising an injection type diffusion mixer (7) for jetting the paint by a fluid pressure of the paint to be fed and uniformly diffusing each paint component. The measuring cylinder (4) includes two or more barrels (B ₁ , B ₂ ) for individually filling the paint components in amounts corresponding to the mixing ratios, and each of these barrels (B ₁ , B ₂ ). The paint feeding device according to claim ₁ , wherein each piston (P ₁ , P ₂ ) that presses out the paint component filled in the container has the same stroke length and is activated and stopped synchronously. In synchronism with the filling of the paint into the pumping cylinder (6) and the feeding of the paint from the cylinder (6), the paint components are discharged from the measuring cylinders (4) and applied to the cylinder (4). The paint feeding device according to claim 1, wherein the filling of the paint components is performed alternately. Each of the cylinders (4, 6) is disposed in one cylinder unit (3), and the preliminary mixer (5) and the injection type diffusion mixer (7) are mounted on the cylinder unit (3). The paint feeding device according to any one of claims 1 to 3. A series of flow paths consisting of the premixer (5), the pressure feed cylinder (6), the injection type diffusion mixer (7) and the pipes connecting them are flowed from the upstream to the downstream. 5. A cleaning system (F _{1 to} F ₄ ) comprising a cleaning system (F _{1 to} F ₄ ) that is divided into a plurality of channels and individually introduces a cleaning fluid into each of the divided channels and cleans the inside of the channels. Paint feeder.

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