JP4358585B2 - Paint supply device and valve unit thereof - Google Patents

Description

  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.

  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.

  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 paints and powder paints.

  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.

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.

  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 is a problem that it is difficult to perform uniform mixing simply by interposing a static mixer in the paint supply flow path as in the case of an organic solvent-based two-component mixed paint.

  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.

For this reason, the applicant of the present invention has proposed a paint feeding apparatus suitable for feeding an aqueous two-component mixed paint having a main agent and a curing agent as paint components.
This paint feeding device is a jet type called jet dispersion by pre-mixing the main agent and hardener measured by a measuring cylinder at a predetermined mixing ratio, and then temporarily storing them in a pressure feeding cylinder and pressing them out at a high pressure. The mixture is uniformly jetted and mixed by a diffusion mixer.
According to this, even the main agent and the curing agent of an aqueous two-component mixed paint that is difficult to mix can be mixed uniformly.
See JP-A-2003-190847

  However, a plurality of paint component filling passages for filling the paint cylinders with the paint components and a paint component delivery passage for feeding the paint components from the measurement cylinder to the pressure feeding cylinder are electrically connected / interrupted at a predetermined arbitrary timing. When valves are individually arranged or controlled, not only the number of parts increases, but also problems to be solved such as troublesome control, assembly and maintenance remain.

  Therefore, the present invention uniformly mixes the main pump and the hardener, such as an aqueous two-component mixed-type paint, using a cylinder pump while feeding the paint to a coating machine or a paint tank while mixing the paint. Needless to say, it is a technical problem to provide a paint feeding apparatus that is excellent in control, assembly and maintenance, and is small and inexpensive by simplifying the structure.

In order to solve this problem, the present invention provides a paint feed for feeding a paint in which two or more kinds of paint components are mixed in a predetermined ratio to a coating machine or a paint tank that is mounted on or detachably attached thereto. In the device
Each of the paint components was squeezed out of the metering unit, and a metering unit formed with a metering cylinder that individually and simultaneously squeezed the paint component at a flow rate that caused turbulence when each flow collided. After storing the paint components premixed by colliding each paint component with a collision mixer, it is provided with a storage unit in which a cylinder for pressure feeding is formed, which is pumped to a coating machine or a paint tank through an injection type diffusion mixer,
A switching valve for switching the flow path is formed by connecting / blocking the paint component filling flow path for filling each paint component into the respective measurement cylinder and the paint component delivery flow path from each measurement cylinder to the collision mixer. Equipped with a valve unit
An injection-type diffusion mixer for injecting and mixing paint and an on-of-valve for connecting / disconnecting the flow path are interposed in the paint pressure-feeding passage for feeding the paint from the cylinder for pressure feeding to a coating machine or a paint tank .
A valve mechanism for forming a mixing flow path having an orifice for spraying paint and a cleaning flow path bypassing the orifice in the spray-type diffusion mixer, and conducting the cleaning flow path during cleaning and shutting off when supplying paint It is characterized by comprising a.

According to the present invention, the paint component filling channel and the paint component delivery flow, which are formed by the three units of the metering unit, the stockpile unit, and the valve unit, and the paint pressure feed passage, and feed the paint component to the metering cylinder. Since the valve unit is formed in the valve unit to switch the flow path by connecting / disconnecting the flow path, simply connecting the paint component filling flow path and the paint component delivery flow path to the valve unit Valves can be installed, and there is no hassle and hassle of installing many valves one by one.
In addition, even if a failure occurs in the valve, it is only necessary to remove and replace or repair the valve unit. It can be quickly restored by replacing the valve unit.
Furthermore, since the weighing unit and the stockpile unit can have a very simple structure without a valve, they are unlikely to break down and the cleaning operation thereof is facilitated.

Next, when mixing and feeding the main component and the curing agent, which are the paint components of the aqueous two-component paint, using this paint feeding device, the paint component filling flow path is first conducted by operating the valve. The main agent and curing agent are filled into the measuring cylinder.
Next, when the paint delivery flow path is turned on, the flow rate is generated at a flow rate that causes turbulence when the respective flows collide from the measuring cylinder, and the pressure is discharged in an amount corresponding to the mixing ratio.
Then, when they are merged by the collision mixer, they are mixed by collision and dispersed uniformly to some extent, and the mixed paint is stored in the cylinder for pressure feeding.
At this time, since the feeding speed is not restricted as in the case of mixing with an injection-type diffusion mixer having a large flow path resistance, the paint can be fed at a high speed from the measuring cylinder to the cylinder for pressure feeding, When this is done, the main agent and the curing agent are mixed with disturbed flow.

Therefore, each paint component is stored in the cylinder for pressure feeding in a state where it is uniformly mixed to some extent, and the mixing ratio is always kept constant.
In addition, by vigorously supplying the paint component from the measuring cylinder, the premixed paint flows in so as to stir the paint in the pressure feeding cylinder, so that the stirring action proceeds.
Furthermore, since the paint in which the paint components are uniformly dispersed in this way is temporarily stored in the cylinder for pressure feeding, molecular diffusion proceeds at the boundary surface of each paint component using the time, and each paint component Will become familiar.
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 film performance cannot be obtained even if it is applied as it is.

Therefore, when the paint is pumped out from the pumping cylinder by making the paint pressure flow path conductive, the paint is jetted by the injection type diffusion mixer, and each paint component having a large particle size is atomized and diffused. There is an effect that even a paint component such as an adhesive main agent and a hydrophobic curing agent that are difficult to mix can be mixed uniformly.
In addition, when stocking in a cylinder for pressure feeding, it can be mixed and mixed at a flow rate that disturbs the flow of each paint component, so use a static mixer that is cumbersome and requires installation space Even if not, there is an advantage that it can be mixed uniformly to some extent.

  The purpose of the present invention is to provide a paint supply device that is excellent in control, assembly, and maintenance by simplifying the structure, and that is small and inexpensive. Realized by unitizing switching valve that switches by shutting off.

  FIG. 1 is a fluid circuit diagram showing an example of a paint feeding device according to the present invention, FIG. 2 is a layout diagram thereof, FIG. 3 is an explanatory diagram showing an example of an injection type diffusion mixer, and FIGS. FIG. 7 is a fluid circuit diagram showing a paint feeding device using another valve unit, FIG. 8 is an explanatory diagram showing another embodiment, and FIG. 9 is a paint feeding device using still another valve unit. FIG. 10 is an explanatory diagram showing a usage state of the paint feeding device.

  A paint feeding apparatus 1 shown in FIG. 1 mixes a water-based two-component paint having a main component and a curing agent as paint components at a predetermined ratio, and is installed in a cartridge-type paint tank 2 that is detachably attached to a coating machine. It is of the type that is fed and filled.

The paint feeding device 1 includes a measuring unit U _{1 including} a measuring cylinder 3 that individually and simultaneously presses the main agent and the curing agent in an amount corresponding to the mixing ratio, and the main agent and the curing agent by the collision mixer 4. After storing the premixed paint, a stockpile unit U ₂ having a pressure feeding cylinder 6 that pumps the paint to a coating machine or paint tank 2 through an injection type diffusion mixer 5 that uniformly mixes the paint is a valve unit U _3. It is detachably assembled and integrated.

Weighing cylinder 3 weighing units U ₁ is the main agent barrel 7A to each filled with content by individually weighed in accordance with the mixing ratio of the main agent and a curing agent, comprising a curing agent barrel 7B, each of these barrels 7A, and 7B Each piston 8A, 8B that presses out the filled main agent and curing agent is attached to the piston 10 so as to be driven by one drive double-action cylinder 9.
Each barrel 7A, 7B is formed to have a cross-sectional area and volume corresponding to the mixing ratio, and the main agent and the curing agent are simply controlled by moving the pistons 8A, 8B simultaneously by the double acting cylinder 9 for driving, without performing special flow control. Can be accurately supplied in an amount corresponding to the mixing ratio at a flow rate corresponding to the mixing ratio.

Further, since the pistons 8A and 8B that press the main agent and the curing agent are driven synchronously by the driving double-acting cylinder 9, it is not necessary to perform troublesome synchronous control. Further, since the drive unit becomes compact, the entire apparatus 1 can be downsized.
Furthermore, pumping cylinder 6 stockpile unit U ₂ is adapted out pressure paint by moving pressure piston 6a with high pressure hydraulic fluid.

The double acting cylinder 9 for driving and the cylinder 6 for pressure feeding are driven by the pressure of the working fluid, and the working fluid is a liquid that does not adversely affect the coating even if it is mixed with the paint. In this example, Liquids that do not contain a functional group that reacts with the curing agent (such as paint thinner) are used.

The valve unit U ₃ is directed to the main agent and the curing agent filling flow paths (paint component filling flow paths) 11A and 11B for filling the measuring cylinder 3, and from the measuring cylinder 3 to the pressure feeding cylinder 6, for each of the main agent and the curing agent. The switching valve 13 is formed for switching the flow path by alternately connecting / blocking the flow paths (paint component flow paths) 12A and 12B for the main agent and the curing agent to be sent out.
The delivery channels 12A and 12B are connected to a collision mixer 4 that collides the main agent and the curing agent and premixes, and the paint premixed in the collision mixer 4 passes through the premixing channel 14. It feeds to the cylinder 6 for pressure feeding.

The switching valve 13 is formed by arranging two pairs of stems 15 and 16 for conducting / blocking the filling channel 11A (11B) and the delivery channel 12A (12B) for each of the main agent and the curing agent.
The stems 15 and 16 are arranged so as to be able to advance and retreat in the axial direction, and are biased in opposite directions by the spring 17 to close the flow paths 11A, 11B, 12A, and 12B, and to drive one unit. The cylinders 18 are opened by retreating the stems 15 and 16 in the axial direction against the elastic force of the spring 17.

  The drive cylinder 18 pushes the stem 15 of the filling flow path 11A (11B) against its biasing direction with a stroke on the top dead center side from the neutral position, and moves the other flow path with a stroke on the bottom dead center side. The stem 16 is pushed against the biasing direction, and a play of a predetermined stroke is provided in the neutral position to keep both the stems 15 and 16 closed.

Specifically, the driving flange 20 attached to the piston 19 of the drive cylinder 18 pushes and moves the driven flanges 21 and 22 formed on the stems 15 and 16, respectively. The driven flanges 21 and 22 are in the neutral position. So that the play of a predetermined stroke is formed in steps.
In this way, each of the stems 15 and 16 can be opened and closed by a single drive cylinder 18, and there is no need to perform any special control to take the timing of switching the flow path, and the drive unit is compact. Therefore, the entire apparatus 1 can be reduced in size.

Then, the delivery channels 12A and 12B are communicated to the pressure feeding cylinder 6 side from the branch port 23 formed on the lower end side of the sliding hole 16a of the stem 16, and when the stem 16 is pushed to the lower end side. A poppet 25 that closes the valve seat 24 formed on the lower end side of the sliding hole 16a is opened.
As a result, even when the downstream hydraulic pressure becomes high, the poppet 25 is urged in the closing direction, so that the mixed paint does not flow backward.
Note that a liquid that does not adversely affect the coating even if mixed with the main agent and the curing agent is supplied to the upper ends of the stems 15 and 16 and the sliding holes 15a and 16a. The agent does not touch the air.

The collision mixer 4 is configured to merge and mix the main agent and the curing agent that are pumped out at a flow rate that disturbs the flow when colliding from the measuring cylinder 3, and is formed by merging the respective delivery flow paths 12A and 12B. In addition, each of the flow paths 12A and 12B is formed in a cross-sectional area ratio equal to the mixing ratio of the main agent and the curing agent at least at the junction.
As a result, the main agent and the curing agent are merged at the same speed, and there is no fluctuation of the mixing ratio due to the speed difference even when considering the flow every minute time. Is done.

The paint pressure-feeding passage 26 extending from the pressure-feeding cylinder 6 of the storage unit U ₂ to the paint tank 2 is electrically connected to an injection-type diffusion mixer 5 called a jet dispersion that jets and mixes the pumped paint. An on-of-valve 27 for blocking is interposed.
As shown in FIG. 3, the injection diffusion type mixer 5 of the present example has an on-of-valve 27 integrated therein.
Specifically, a cylindrical discharge flow path 32 having a valve seat formed at the lower end is disposed in the casing 31, the casing 31 is connected to the pressure feeding tank 6, and the discharge flow path 32 is connected to the paint tank 2 side. It is connected to the.
A fine orifice 33 having a diameter of about 0.2 to 0.5 mm is formed to face the discharge flow path 32, and a cylindrical valve body 34 is inserted into the discharge passage 32 so as to advance and retreat. The orifice 33 and the front end opening 35 are closed (FIG. 3A), the orifice 33 and the front end opening 35 are opened while the rear end opening 36 is closed (FIG. 3B), and all are opened during cleaning. (FIG. 3 (c)).
As a result, when the valve body 34 is advanced, all of the orifice 33, the front end opening 35, and the rear end opening 36 formed in the discharge flow path 32 are blocked, so that the paint pressure feed flow path 26 is blocked. (FIG. 3A).
Further, if the valve body 34 is retracted halfway, the orifice 33 and the tip opening 35 are opened while the rear end opening 36 is closed, so that the coating material is supplied from the pressure feed cylinder 6 at a high pressure and the orifice 33 is removed. By spraying the paint, it can be made into fine particles and uniformly mixed (FIG. 3B).
When the valve body 34 is retracted, all of the orifice 33, the tip opening 35 and the rear end opening 36 are opened (FIG. 3C), so that the orifice 33 is bypassed from the rear end opening 36 and the tip is bypassed. A cleaning channel reaching the opening 35 is formed.

  38A and 38B reach the injection type diffusion mixer 5 from the switching valve 13 through the coating material supply passages 12A, 12B-impact mixer 4-preliminary mixing passage 13-pressure feeding cylinder 6-paint pressure feeding passage 26. A cleaning valve that forms a cleaning system that supplies cleaning fluid such as cleaning liquid and cleaning air from the upstream side of the flow path and discharges it from the downstream side, and that remains in the flow path with the main agent and curing agent mixed. It is preventing.

Further, the flow path 11A, 11B, 12A, 12B, 14, 26 are metering unit _{U 1} and stockpiling Yutto _{U 2} when mounted on the valve unit _{U 3,} the flow passage to each other are directly connected or channel and each cylinder Openings are formed in the units U _{1 to} U ₃ so that 3 and 6 are directly connected.
Thus, each flow path 11A by simply assembling the respective units _{U 1 ~U 3, 11B, 12A} , 12B, since 14 and 26 are communicated, and effort of connection of the paint hose, unit _U 1 ~U ₃ There is no hassle of handling the paint component and paint pipes between them, the configuration is further simplified, the assembly is simplified, the maintainability is improved, and the entire apparatus 1 becomes more compact.
Moreover, since each flow path is connected by the shortest flow path, there are few remaining coating materials which should be discarded, and a cleaning property is improved.

  If necessary, delivery channels 12A and 12B from the measuring cylinder 3 to the collision mixer 4; a premixing channel 14 from the collision mixer 4 to the pressure cylinder 6; and an injection type diffusion from the pressure cylinder 6 A pipe-type stirring mixer or an orifice may be interposed in the paint pressure-feeding passage 26 leading to the mixer 5.

The above is an example configuration of the present invention, and its operation will be described next.
First, when the driving flange 18 is moved upward from the neutral position by the drive cylinder 18, the stem 16 is maintained in a closed state and the main agent and the curing agent delivery channels 12A and 12B are shut off. The stem 15 is pushed up to enter an open state, and the main agent and curing agent filling channels 11A and 11B are conducted, whereby the main agent and the curing agent are filled into the measuring cylinder 3 (see FIG. 4).

When the driving flange 20 is moved downward when the filling is completed, the stem 15 is lowered and closed, and the main agent and curing agent filling channels 11A and 11B are shut off, and then the stem 16 is closed. Is pushed down to enter an open state, and the main agent and curing agent supply passages 12A and 12B are conducted.
At the same time, when the working fluid is supplied to the measuring cylinder 3 and the main agent and the curing agent are sent out at a flow rate that causes turbulence when the respective flows collide, the main agent and the curing agent are collided by the collision mixer 4, The flow is turbulent or turbulent and premixed, and the paint passes through the premixing flow path 14 and is stored in the cylinder 6 for pressure feeding (see FIG. 5).

  When the stockpile is completed, the driving flange 20 is moved upward, and accordingly, the stem 16 is closed, and the main agent and curing agent delivery passages 12A and 12B are shut off, and then the pumping cylinder 6 is turned on. If the hydraulic fluid is supplied at a high pressure to press the coating material, the coating material is atomized and diffused by the injection type diffusion mixer 5, so that the coating material is mixed more uniformly. The paint mixed in is fed to the paint tank 2 (see FIG. 6).

At this time, the flow resistance by the injection type diffusion mixer 5 arranged on the paint feed flow path 26 side acts on the poppet 25 via the preliminary flow path 14 and the paint feed flow paths 12A and 12B. Since the pressure is further strongly pressed against the valve seat 24, the pressure is divided by the poppet 25 and does not act on the measuring cylinder 3 side.
Further, since the poppet 25 is brought into close contact with the valve seat 24 by the pressure, the branch port 23 is reliably blocked and no liquid leaks.

  As the driving flange 20 moves upward, the main cylinder and the curing agent can be filled into the measuring cylinder 3 while the paint is supplied from the pressure tank 6 in which the filling passages 11A and 11B are conducted. As soon as the supply of the paint from the pressure feeding cylinder 6 is completed, the main agent and the curing agent can be supplied from the measuring cylinder 3, and no time loss occurs.

Incidentally, the description has been given of the case where we arranged units U _1, U _2, U ₃ together, the present invention is not limited to this, for example, to supply the paint sprayer attached to the robot arm, the units Each of U ₁ , U ₂ , and U ₃ may be separated and attached to an arbitrary place.
Further, the switching valve 13 is not limited to the case where the individual stems 15 and 16 are driven by a single cylinder 18, but may be driven by individual cylinders.
Furthermore, the measuring cylinder 3, the pressure feeding cylinder 6, and the driving cylinder 18 of the switching valve 13 are not limited to those driven by the working fluid, and any driving source can be adopted.

When continuously supplying paint to the coating machine 61 at an arbitrary flow rate, as shown in FIG. 7 (a), the paint mixed in the paint feeder 1 is stored in a charge tank 62 having a predetermined capacity. Can be continuously supplied by a constant supply means such as a gear pump 63, or can be stored in a predetermined capacity of the cylinder 64 as shown in FIG. 7 (b), and can be pumped out in a fixed quantity, as shown in FIG. 7 (c) . The cylinders 65 and 66 having predetermined capacities are provided in parallel, and these are alternately pushed and moved by, for example, one drive source 67 to press the paint from one cylinder 65 and apply the other cylinder 66. It is also possible to store the inflowing paint by making it free and repeat this alternately.
Furthermore, as shown in FIG. 7 (d), two paint feeding devices 1 and 1 are connected in parallel to the coating machine 61, and the pressure feeding cylinder of one of the paint feeding devices 1 is connected. While the paint is being extruded from 6 and applied, it may be stored in the pressure-feeding cylinder 6 of the other paint-feeding device 1, and this may be repeated alternately to continuously supply the paint to the coating machine 61. .

  It is suitable for applications such as a water-based two-component mixed paint that supplies a main agent that is difficult to mix and a curing agent while mixing them uniformly.

The fluid circuit diagram which shows the coating material feeding apparatus which concerns on this invention. The layout diagram. Explanatory drawing which shows the example of an injection type diffusion mixer. The fluid circuit diagram which shows operation | movement. The fluid circuit diagram which shows operation | movement. The fluid circuit diagram which shows operation | movement. Explanatory drawing which shows the use condition of a coating material feeder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paint supply apparatus 2 Paint tank 3 Measuring cylinder U ₁ Measuring unit 4 Collision mixer 5 Injection type diffusion mixer 6 Pressure feeding cylinder U ₂ Storage unit
U ₃ valve unit
11A, 11B Filling channel (Paint component filling channel)
12A, 12B delivery channel (paint component delivery channel)
13 Switching valve 14 Premixing flow path 15, 16 Stem 23 Sliding hole 25 Poppet 26 Paint pressure feed flow path 27 On-off valve

Claims (16)

In a paint feeding device that feeds a paint obtained by mixing two or more kinds of paint components in a predetermined ratio to a coating machine or a paint tank that is mounted on or removable from the coating machine,
Each of the paint components was squeezed out of the metering unit, and a metering unit formed with a metering cylinder that individually and simultaneously squeezed the paint component at a flow rate that caused turbulence when each flow collided. After storing the paint components premixed by colliding each paint component with a collision mixer, it is provided with a storage unit in which a cylinder for pressure feeding is formed, which is pumped to a coating machine or a paint tank through an injection type diffusion mixer,
A switching valve for switching the flow path is formed by connecting / blocking the paint component filling flow path for filling each paint component into the respective measurement cylinder and the paint component delivery flow path from each measurement cylinder to the collision mixer. Equipped with a valve unit
An injection-type diffusion mixer for injecting and mixing paint and an on-of-valve for connecting / disconnecting the flow path are interposed in the paint pressure-feeding passage for feeding the paint from the cylinder for pressure feeding to a coating machine or a paint tank .
A valve mechanism for forming a mixing flow path having an orifice for spraying paint and a cleaning flow path bypassing the orifice in the spray-type diffusion mixer, and conducting the cleaning flow path during cleaning and shutting off when supplying paint paint delivery device characterized by comprising a. In a paint feeding device that feeds a paint obtained by mixing two or more kinds of paint components in a predetermined ratio to a coating machine or a paint tank that is mounted on or removable from the coating machine,
Each of the paint components was squeezed out of the metering unit, and a metering unit formed with a metering cylinder that individually and simultaneously squeezed the paint component at a flow rate that caused turbulence when each flow collided. After storing the paint components premixed by colliding each paint component with a collision mixer, it is provided with a storage unit in which a cylinder for pressure feeding is formed, which is pumped to a coating machine or a paint tank through an injection type diffusion mixer,
A switching valve for switching the flow path is formed by connecting / blocking the paint component filling flow path for filling each paint component into the respective measurement cylinder and the paint component delivery flow path from each measurement cylinder to the collision mixer. Equipped with a valve unit
The switching valve is provided with a pair of stems that are advanced and retracted in the axial direction to alternately conduct / cut off each flow path at a predetermined timing, and includes a drive cylinder that advances and retracts each stem.
An injection-type diffusion mixer for injecting and mixing paint and an on-of-valve for connecting / disconnecting the flow path are interposed in the paint pressure-feeding passage for feeding the paint from the cylinder for pressure feeding to a coating machine or a paint tank .
A valve mechanism for forming a mixing flow path having an orifice for spraying paint and a cleaning flow path bypassing the orifice in the spray-type diffusion mixer, and conducting the cleaning flow path during cleaning and shutting off when supplying paint paint delivery device characterized by comprising a. The paint feeder according to claim 1 , wherein the collision mixer is formed by a flow path for joining the paint components. 4. The valve unit according to claim 1 , wherein a switching valve that alternately switches between a paint component filling channel and a paint component delivery channel for one paint component is formed according to the number of each paint component. Paint feeder. A pipe-type stirring mixer for promoting mixing in at least one of the paint component delivery channels from the metering cylinder to the collision mixer, and the preliminary mixing channels from the collision mixer to the pressure cylinder, or The paint feeding device according to any one of claims 1 to 4, wherein an orifice is provided. The paint feeding device according to any one of claims 1 to 5, wherein each paint component delivery flow path connected to the collision mixer is formed to have a cross-sectional area ratio equal to a mixing ratio of each paint component. The paint feeding device according to any one of claims 1 to 6 , wherein a pipe-type stirring mixer or an orifice for promoting mixing is arranged in a paint pressure-feeding passage extending from the pressure-feeding cylinder to the injection-type diffusion mixer. Claims wherein the metering cylinder, each amount corresponding to each its mixing ratio of paint components comprising two or more barrels to be filled individually, each piston out pressure paint ingredients filled in each of these barrels have the same stroke length Item 8. A paint feeder according to any one of Items 1 to 7 . The cleaning fluid is supplied from the upstream side of the flow path from the changeover valve to the coating component delivery flow path-collision mixer-preliminary mixing flow path-cylinder for pressure feeding-through the paint feeding flow path to the injection type diffusion mixer. The paint feeding device according to any one of claims 1 to 8, further comprising a cleaning system for discharging. The paint feeding device according to any one of claims 1 to 9 , wherein the weighing unit, a stockpile unit, a valve unit, an injection-type diffusion mixer, and an on / off valve are integrated. The paint feeding device according to any one of claims 1 to 10, wherein the spray diffusion mixer and the on / off valve are integrated. A valve unit comprising a paint component filling flow path for filling the paint component into the measuring cylinder and a switching valve for connecting / blocking each flow path of the paint component delivery flow path for sending the paint component from the measurement cylinder;
The switching valve is provided with a pair of stems that are advanced and retracted in the axial direction to alternately conduct / cut off each flow path at a predetermined timing, and includes a drive cylinder that advances and retracts each stem. Valve unit. The switching valve is closed by a pair of stems that are advanced and retracted in the axial direction to alternately conduct / cut off each flow path in the opposite directions.
One drive cylinder for advancing and retreating each stem is arranged, and the stem of one flow path is pushed against the biasing direction by the stroke from the neutral position to the top dead center side, and the bottom dead center side is also moved. The valve unit according to claim 12, wherein the valve unit is configured to push and move the stem of the other flow path against its biasing direction by a stroke.   14. The valve unit according to claim 13, wherein a play of a predetermined stroke for maintaining both stems in a closed state is provided at a neutral position of the drive cylinder.   As the switching valve, two pairs of stems for conducting / blocking the paint component filling channel and the paint component delivery channel are arranged in two sets for each of the main agent and the curing agent as the paint component, and one drive cylinder 15. The valve unit according to claim 12, wherein the whole stem is pushed and moved.   A poppet in which the paint component delivery passage is communicated with a pressure feeding cylinder from one end side of the sliding hole of the stem, and closes one end side of the sliding hole when the stem is pushed and moved from the other end side to the one end side The valve unit according to claim 12, which is configured to be opened.

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