JP2006043491A - Coating material stirring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To not only enhance uniformness of a coating material but also certainly washing/removing the remained coating material by the required minimum washing fluid. <P>SOLUTION: In the coating material stirring device, the predetermined number of coating material flowing-in ports (6...) are formed on an upstream side annular part (3a) of a liquid film flow passage (3) formed by superposing a conical recession surface (5A) and a conical projection surface (5B) with a predetermined clearance and a flowing-out port (7) formed on a downstream side apex part (3b) is communicated with a conduit stirrer (4). The washing fluid is fed to check valves (9) for preventing reverse flow of the coating material arranged on the respective coating material flowing-in ports (6...) from the downstream side and a washing flow passage (11) for washing the liquid film flow passage (3) and the conduit stirrer (4) is formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention stirs one or more coating materials selectively supplied from a plurality of types of coating materials, and feeds them to a coating machine such as a coating machine or a paint tank that is detachably mounted on the coating machine. In particular, the apparatus is suitable for use in a coating material stirring device that stirs and mixes a main component of a two-component mixed paint and a curing agent.

The present applicant has proposed a mixer that mixes while supplying in-line a main agent and a curing agent as coating material components of a multi-component mixed paint and two or more kinds of paints having different colors.
JP 2001-239190 A

FIG. 4 shows a coating machine that incorporates such a mixer and is used when a plurality of types of two-component mixed paints K ₁ and K ₂ are selectively stirred and mixed for coating.
The coating machine T is formed with a required number of inflow ports 41 through which the main component and the curing agent of the two-component mixed paints K ₁ and K ₂ are individually introduced, and a valve device 42 for switching and supplying the main agent and the cleaning fluid. The main agent supply pipes 43A and 44A provided, and the hardener supply pipes 43B and 44B provided with valve devices 45 for switching and supplying the hardener and the cleaning fluid are connected to the inflow port 41 through the paint pump 46. ing.
And each inflow port 41 ... is the tubular static mixer (pipe agitator) inserted in the non-contact state in the tubular rotating shaft 49 of the air motor 48 which rotationally drives the rotary atomization head (atomization mechanism) 47 at high speed. It is connected to 50 inflow ports 50 in via pipes 51 and 52.

According to this, when the paint on the other two-liquid mixing type coating K _1, open the coating material valve 53 of the valve device 42 and 45 of the main agent supply pipe 43A and a curing agent supply pipe 43B, thereby operating the pump 46 Then, the main agent M ₁ and the curing agent H _{1 of} the two-component mixed paint K ₁ are supplied to the coating machine T, and are uniformly stirred and mixed by the static mixer 50 through the pipe 51 from the inflow port 41. The head 47 is supplied.
During this time, the main agent M ₁ and the hardener H ₁ are supplied via the pipe 51 connected to the main agent supply pipe 43A and the hardener supply pipe 43B, and the pipe connected to the main agent supply pipe 43A and the hardener supply pipe 43B. Since the main agent M ₁ and the curing agent H ₁ flow backward in 52, the pipes 51 and 52 are both filled with the main agent M ₁ and the curing agent H ₁ .

Next, when the other two-component mixed paint K ₂ is applied, the cleaning liquid valve 54 of each valve device 42 and 45 is not mixed with the main agent M ₁ and the curing agent H ₁ remaining in the pipes 51 and 52. The cleaning air valves 55 are alternately opened and closed, and cleaning liquid and cleaning air are alternately supplied to clean the pipes 51 and 52 at the same time.
Thereafter, by opening the coating material valve of the valve device 42 and 45 of the main agent supply pipe 44A and a curing agent supply pipe 44B, if caused to operate the pump 46, a two-liquid mixing type coating material K ₂ main agent M ₂ and a curing agent H ₂ Is supplied to the coating machine T, passes through the pipe 52 from the inflow port 41..., Is uniformly stirred and mixed by the static mixer 50, and is supplied to the rotary atomizing head 47.

  However, in the conventional cleaning system, cleaning liquid and cleaning air are supplied from the cleaning liquid valve 54 and the cleaning air valve 55 attached to the valve devices 42 and 45 interposed in the main agent supply pipes 43A and 44A and the curing agent supply pipes 43B and 44B. Therefore, in order to clean the pipes 51 and 52 each time coating is completed, all the flow paths from the valve devices 42 and 45 to the static mixer 50 must be cleaned, which increases the amount of cleaning fluid used. There was a problem.

  Further, when stirring and mixing with the static mixer 50, there is unevenness in the paint components contained in the main agent and the hardener supplied through the main agent supply pipes 43A and 44A and the hardener supply pipes 43B and 44B, and the viscosity of the coating material It has been found that when the film is non-uniform, it is not uniformly mixed even through the static mixer 50 and a coating failure may occur.

  In view of this, the present invention has a technical problem of firstly improving the uniformity of the coating material by stirring and secondly ensuring that the remaining coating material can be washed and removed with the minimum necessary cleaning fluid.

  In order to solve this problem, the present invention is an application material agitating device that agitates one or more application materials selectively supplied from a plurality of types of application materials and feeds them to a coating device, and has two surfaces defined. A required number of coating material inflow ports for allowing each coating material to flow individually from the peripheral end portion thereof are formed in the liquid film flow path formed by the planar space with the clearance of 3 and formed in the vicinity of the center thereof. A pipe stirrer that stirs the coating material that has passed through the liquid film flow path is connected to the outlet, and each of the coating material inlets is opened by the supply pressure of the coating material and pressure is applied in the reverse flow direction. A check valve that is sometimes closed is interposed, and a cleaning fluid and a cleaning fluid of cleaning air are supplied to each of the check valves from the downstream side thereof so that the liquid film channel and the pipe stirrer are provided. A cleaning flow path for cleaning is formed.

According to the coating material agitating apparatus according to the present invention, the coating material that has passed through the liquid film flow path after the selectively supplied coating material is flowed in the form of a film in the liquid film flow path is a line stirrer such as a static mixer. It is stirred by passing through.
Since the liquid film channel is formed by a planar space in which two surfaces are overlapped with a predetermined clearance, the coating material flowing in from the coating material inflow port formed at the peripheral edge portion is formed near the center. It flows as a liquid film with the thickness of the clearance toward the outlet.

That is, the coating material is thinly extended in the liquid film channel having a narrow clearance and the flow rate of the coating material is accelerated because the cross-sectional area of the channel is narrow, so that the flow in the liquid film channel becomes turbulent. Will be agitated by their own flow.
Therefore, even if a coating material having a non-uniform viscosity is supplied, the paint components contained in the coating material are pre-stirred so that they are uniform. Mixed.
Then, the pre-stirred and pre-mixed coating material is surely made uniform by passing through a pipe stirrer such as a static mixer from the outflow port, and the uniformity of the coating quality is improved.
Each application material inlet is provided with a check valve that is opened by the supply pressure of the application material and is closed when pressure is applied in the reverse flow direction. Since only the valve is opened and the coating material inlet for supplying other coating materials is blocked by a check valve, different types of coating materials flow backward from the other coating material inlets and flow into the respective flow paths. It wo n’t mix.

  Here, as described in claim 3, the liquid film flow path has a conical dish shape in which a conical concave surface and a conical convex surface with the apex directed to the downstream side and the bottom peripheral edge directed to the upstream side are overlapped with a predetermined clearance. If it is formed in the space, the flow passage cross-sectional area gradually decreases from the coating material inlet formed at the upstream peripheral portion to the outlet at the lower end side vertex portion, so that the coating flowing through the liquid film channel The material is rapidly accelerated toward the outlet and the sales expansion function is improved.

  Further, as described in claim 4, if the conical concave surface and the conical convex surface forming the liquid film flow path are separably attached, the liquid film flow path with a slight clearance can be obtained by separating them. It can be easily cleaned, and maintenance workability is improved.

  Furthermore, as described in claim 5, the check valve arranged at the coating material inflow port includes a permanent magnet that biases the valve body having magnetic adhesion toward the valve seat formed on the upstream side. With this structure, the spring for urging the valve body is not necessary, and the number of places where the coating material accumulates, such as a gap between the springs, is reduced, and the cleaning property is excellent.

Furthermore, since cleaning channels for supplying cleaning fluid and cleaning fluid for cleaning air are formed on the downstream side of the check valve for each coating material inlet, the cleaning fluid is supplied all at once from each cleaning channel. Thus, the cleaning fluid flows in the liquid film channel and the pipe stirrer on the downstream side from the coating material inlet, and the remaining coating material is washed and removed.
That is, a check valve is arranged at each coating material inflow port, and there is no possibility that the coating materials are mixed on the upstream side, so there is no need for cleaning, only the downstream side where the coating material may be mixed. Since it is sufficient to wash the liquid, the amount of cleaning fluid used can be reduced.
In this case, as described in claim 6, if the cleaning channel is formed along the tangent line of the peripheral portion of the liquid film channel from the outside toward each coating material inlet, the liquid film channel Since a vortex that flows spirally from the peripheral edge toward the center is formed, the cleaning effect is further improved.

  In this example, the problem of improving the uniformity of the coating material by agitation and reliably cleaning and removing the remaining coating material with the minimum required cleaning fluid is the same as that of the conical dish type from the coating material inlet with a check valve. This was achieved by adopting a configuration in which the coating material was allowed to flow through the liquid film channel and into the pipe-type stirrer.

  1 is a vertical sectional view showing a coating material agitator according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a horizontal sectional view thereof.

The coating material stirrer 1 shown in FIGS. 1 to 3 stirs one or more coating materials selected and supplied from a plurality of coating material supply sources (not shown) so that the coating machine can be equipped with or removed from the coating machine. Used to feed paint equipment such as paint tanks to be installed.
In this example, eight inflow ports P _{1 to} P ₄ and Q _{1 to} Q ₄ connecting the respective coating material supply pipes are formed radially on the upper peripheral surface of the stirrer body 2 and face each other in the diameter direction. A main agent supply source and a curing agent supply source (not shown) of three kinds of two-component mixed paint are connected to the pair of inflow ports P _{1 to} P ₃ and Q _{1 to} Q ₃ , and the remaining two inflow ports P ₄ and Q any solid paint supply source ₄ (not shown) is connected.
That is, in this example, the main agent, the curing agent, and the coating material are supplied to the stirrer 1 as the coating material.

The lower peripheral surface of the stirrer body 2 is formed with an outflow port Pout for feeding the coating material after completion of stirring to the coating equipment, and the outflow port from each of the inflow ports P _{1 to} P ₄ and Q _{1 to} Q ₄ A liquid film channel 3 is formed in the coating material channel leading to Pout, and the coating material supplied and supplied in a film form, and a static mixer (pipe line) that stirs the coating material that has passed through the liquid film channel 3 Stirrer) 4 is arranged.

The liquid film channel 3 is formed by a planar space in which two surfaces are overlapped with a predetermined clearance. In this example, the conical concave surface 5A and the conical convex surface 5B are formed in a conical dish type space in which the surfaces are overlapped with a clearance of about 1 mm, and are arranged downward so that the apex 3b is on the downstream side. The part (peripheral part) 3a is arranged upward so as to be on the upstream side.
In other words, the upstream annular portion 3a of the liquid film channel 3 communicates with the inflow ports P _{1 to} P ₄ and Q _{1 to} Q ₄ so that each coating material individually flows into the liquid film channel 3. A required number of coating material inflow ports 6 are formed, and an outflow port 7 is formed at the apex 3b located at the center thereof. In the flow path 8 that circulates in the horizontal direction from the outflow port 7 to the outflow port Pout. The static mixer 4 is accommodated and disposed.
That is, the liquid film channel 3 is formed by a conical rotating body space centered on the outflow port 7, and the coating material inflow ports 6 are formed in the upstream annular portion 3a.

Each of the coating material inlets 6 is provided with a check valve 9 that is opened by the supply pressure of the coating material and is closed when pressure is applied in the reverse flow direction.
The check valve 9 includes a permanent magnet 10 that biases a valve body 9a such as a ball or poppet having magnetic adhesion formed of a ferromagnetic material or the like toward a valve seat 9b formed on the upstream side. In this example, the permanent magnet 10 is selected such that the cracking pressure is 0.4 kgf / cm ² and the attractive force is 60 gf.

Further, on the lower peripheral surface of the stirrer body 2, the cleaning liquid and the coating material inlet 6 communicated with the inflow ports P _{1 to} P ₄ and the coating material inlet 6 communicated with the inflow ports Q _{1 to} Q ₄ are provided. Two cleaning fluid supply ports C ₁ and C ₂ for supplying a cleaning fluid such as cleaning air are formed opposite to each other in the diameter direction.
The cleaning flow path 11 for supplying the cleaning fluid flowing in from the supply ports C ₁ and C ₂ to the coating material inlets 6... Has an arcuate main cleaning flow path 12 communicated with the supply ports C ₁ and C _2. The main cleaning channel 12 diverges from the main cleaning channel 12, and the coating material inflow ports 6 discharge the cleaning fluid.

The main cleaning channel 12 is formed in an arc shape having a diameter larger than the pitch circle when the coating material inlets 6 are arranged on the circumference, and the branch channel 13 is upstream of the liquid film channel 3. It is formed along the tangent of the side annular portion 3a from the outer side toward each coating material inlet 6.
As a result, the cleaning liquid fluid supplied to each coating material inlet 6 through the cleaning channel 11 including the main cleaning channel 12 and the branch channel 13 from the downstream side with respect to the check valves 9. The discharged liquid film channel 3 and the static mixer 4 are washed.

At this time, the cleaning fluid is supplied from the outer side in the tangential direction of the upstream-side annular portion 3a of the liquid film channel 3 toward each coating material inlet 6 through the branch channel 13. The inside of the liquid film flow path 3 formed by the mold space is spirally swirled and becomes a vortex flow that flows toward the outlet 7, and the liquid film flow path 3 can be thoroughly cleaned in every corner.
Thereafter, the inside of the static mixer 4 is washed, and the waste liquid is discharged from the outflow port Pout.
Note that the cleaning fluid supply port C ₁ and C _2, and opened at the supply pressure of the cleaning fluid, the check valve 14 is closed when the pressure exerted is interposed backflow direction, at the time of coating material supply The coating material does not flow into the cleaning fluid channel.
The check valve 14 includes a permanent magnet 15 that urges a valve body 14a such as a ball or poppet formed of a ferromagnetic material or the like toward the valve seat 14b formed on the upstream side. In this example, the permanent magnet 15 is selected so that the cracking pressure is 0.4 kgf / cm ² and the attractive force is 60 gf.

The above is one configuration example of the present invention, and the operation thereof will be described next. First, for example, a two-component mixed type obtained by stirring and mixing the main agent and the curing agent supplied via the inflow ports P ₁ and Q _1. When supplying the paint, when the main agent and the curing agent are pumped from the respective main agent supply source and curing agent supply source, they are arranged at the coating material inlets 6 and 6 communicating with the inflow ports P ₁ and Q ₁ by the supply pressure. When the valve body 9a of the check valve 9 is pushed away from the valve seat 9b and opened against the magnetic force of the permanent magnet 10, the main agent and the curing agent pass through the liquid film channel 3 and the static mixer 4. Stir and mix.

Since the liquid film channel 3 is formed in a conical dish-shaped space having a predetermined clearance, the main agent and the curing agent that flowed in from the coating material inlet 6 formed in the upstream annular portion 3a are formed at the apex 3b. It flows as a liquid film with the clearance toward the outlet 7.
At this time, since the main agent and the curing agent are thinly extended in the liquid film flow path 3 having a narrow clearance, they spread into the liquid film flow path 3 and come into contact with each other and mix.

In addition, the cross-sectional area of the flow path gradually decreases from the coating material inlet 6 toward the outlet 7, and the main agent and the curing agent flowing through the liquid film flow path 3 are accelerated toward the outlet, so that the clearance is narrow. In the liquid film channel 3, the flow becomes turbulent, and the main agent and the curing agent are stirred and mixed.
The coating material preliminarily stirred and premixed in this way is surely made uniform by passing through the static mixer, and the uniformity of the coating quality is improved.

At this time, only the check valve 9 is opened by the main agent and the curing agent supplied by pressure supply, and the coating material inlet 6 communicating with the other inflow ports P _{2 to} P ₄ and Q _{2 to} Q ₄ . Since the check valves 9 are closed, different kinds of coating materials do not flow backward from the other coating material inlets 6 and are not mixed.
Further, if the check valve 9 has a spring-less structure in which a valve body having magnetic adhesion is urged by a permanent magnet, a spring gap in which the coating material tends to accumulate is not formed, and the cleaning performance is excellent.

Further, not only the two-liquid mixing type coating material, may be supplied alone solids coating through the inlet port P _4, similarly, disposed in the coating material inlet port 6 which communicates with the inlet port P ₄ with its supply pressure When the check valve 9 is opened, the paint is stirred and mixed when passing through the liquid film channel 3 and the static mixer 4.
In the liquid film channel 3, the liquid film of the clearance is thinly extended from the coating material inlet 6 toward the outlet 7, and is accelerated toward the outlet 7 to become a turbulent flow. Even if the viscosity of the paint is not uniform, it is preliminarily stirred in the liquid film flow path 3 and adjusted so that the paint components become substantially uniform, and then the static mixer 4 is reliably stirred so that the paint quality is uniform. Will improve.

Then, when the coating is completed, in a state where the supply of all the coating materials is stopped, the cleaning liquid and the cleaning air are alternately supplied from the cleaning channel 11 to clean the coating material stirrer 1.
In this case, since the check valve 9 of each coating material inlet 6 is closed, when cleaning fluid of cleaning liquid and cleaning air is supplied from the downstream side, the cleaning fluid flows from the coating material inlet 6 toward the downstream side. Flowing through the liquid film flow path 3 and the static mixer 4, the remaining coating materials such as the main agent and the curing agent are washed away.
In addition, since the cleaning fluid is supplied from the outside in the tangential direction of the upstream annular portion 3a of the liquid film channel 3 toward each coating material inlet 6 through the branch channels 13, the cleaning fluid is a conical dish type. A spiral vortex spirals in the liquid film flow path 3 formed in the space and flows toward the outlet 7, and the liquid film flow path 3 can be thoroughly cleaned in every corner.
Each of the coating material inlets 6 is provided with a check valve 9. The upstream side of the coating material does not need to be cleaned because the coating materials do not mix with each other, and the coating material may be mixed. Therefore, it is sufficient to clean the inside of the liquid film channel 3 and the static mixer 4 on the downstream side, so that the amount of the cleaning fluid used can be suppressed.

  Furthermore, since the conical concave surface 5A and the conical convex surface 5B forming the liquid film flow path 3 are separably attached, when performing maintenance, the liquid film flow path 3 can be easily cleaned by separating them. There is also an advantage that the workability is improved.

As described above, according to the present example, as the coating material, the main component and curing agent of the two-component mixed paint are supplied, or the one-component type paint such as the solid paint is supplied. Since the coating material spreads and accelerates in the form of a liquid film in the path 3, the turbulent flow is promoted in the liquid film flow path 3, and the stirring is promoted, and the pre-stirred coating material flows into the static mixer 4 in this way. To ensure agitation.
Therefore, in the two-component paint, the main agent and the curing agent are reliably agitated and mixed, and in the one-component paint, the paint components are agitated so as to be uniformly dispersed, thereby improving the uniformity of the paint quality. is there.
Further, since the check valve 9 is interposed in the coating material inlet 6 to the liquid film channel 3, the coating material is not mixed on the upstream side, and the liquid film channel on the downstream side is not mixed. 3 and the static mixer 4 may cause the coating material to be mixed, so it is sufficient to clean only that portion, and it is possible to save cleaning fluid and reliably clean and remove the remaining coating material with the minimum required amount of use. There is also an effect.

  The present invention is equipped with one or more coating materials selected and supplied from a plurality of types of coating materials, such as a main component and a curing agent of a two-component mixed coating material, and a solid coating material, and is attached or detached to and from a coating machine. It is suitable for use in agitating so that the paint components are uniformly dispersed when being fed to a painting device such as a paint tank.

The vertical sectional view which shows the coating material stirrer concerning this invention. The plan view. The horizontal sectional view. Explanatory drawing which shows a conventional apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating material stirrer 2 Stirrer main body 3 Liquid film flow path 3a Upstream side annular part 3b Downstream side vertex part 4 Static mixer (pipeline stirrer)
5A Conical concave surface 5B Conical convex surface
6 Application Material Inlet 7 Outlet 8 Channel 9 Check Valve 9a Valve Body 9b Valve Seat 10 Permanent Magnet 11 Cleaning Channel

Claims (6)

A coating material stirring device that stirs one or more coating materials selectively supplied from a plurality of types of coating materials and feeds them to a coating device,
A required number of coating material inflow ports are formed in the liquid film flow path, which is a planar space in which two surfaces are overlapped with a predetermined clearance, from which the respective coating materials are individually introduced from the peripheral end thereof, in the vicinity of the center thereof. A pipe stirrer that stirs the coating material that has passed through the liquid film flow path is connected to the formed outlet,
Each of the coating material inlets is provided with a check valve which is opened when a supply pressure of the coating material is applied and pressure is applied in the reverse flow direction, and downstream of the check valve. A coating material agitation apparatus, wherein a cleaning channel for supplying a cleaning fluid and cleaning fluid of cleaning air from the side to clean the liquid film channel and the pipe stirrer is formed. A coating material stirring device that stirs one or more coating materials selectively supplied from a plurality of types of coating materials and feeds them to a coating device,
A required number of coating material inflow ports are formed in the liquid film flow path, which is a planar space in which two surfaces are overlapped with a predetermined clearance, from which the respective coating materials are individually introduced from the peripheral end thereof, in the vicinity of the center thereof. A pipe stirrer that stirs the coating material that has passed through the liquid film flow path is connected to the formed outlet,
A coating material agitating device, wherein each of the coating material inlets is provided with a check valve that is opened when a supply pressure of the coating material is applied and pressure is applied in the reverse flow direction.   The liquid film channel is formed in a conical dish-shaped space in which a conical concave surface and a conical convex surface with the apex directed to the downstream side and the bottom surface peripheral portion directed to the upstream side are overlapped with a predetermined clearance. The coating material agitating device according to claim 1, wherein the coating material inflow port is formed and an outflow port is formed at the lower end side apex portion.   The coating material stirring apparatus according to claim 1 or 2, wherein two surfaces forming the liquid film channel are detachably attached.   The said check valve is a coating material stirring apparatus of Claim 1 or 2 provided with the permanent magnet which urges | biases the valve body which has magnetic adhesion toward the valve seat formed in the upstream. The liquid film channel is formed in a rotating body space centered on the outlet, and an application material inlet is formed at the upstream peripheral edge thereof, and the cleaning fluid is supplied to each application material inlet. 2. The cleaning channel is formed from the outside toward the respective coating material inlets along the tangent line of the upstream peripheral portion of the liquid film channel so as to generate a vortex flow in the liquid film channel. Or the coating material stirring apparatus of 2.

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