JP2007275753A - Two-liquid mixing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-liquid mixing apparatus reducing an amount of a washing component consumed and enhancing an efficiency of a washing work by reducing positions being not washed in a mixing liquid feeding passage. <P>SOLUTION: In the two-liquid mixing apparatus 100 in which a main agent and a curing agent as two kinds of coating components are mixed and discharged to the mixing liquid feeding passage 61, a main agent feeding passage 64 fed with the main agent, a curing agent feeding passage 65 fed with the curing agent, a washing liquid feeding passage 66 fed with a washing liquid for washing the mixing liquid feeding passage 61, and a mixing point 70 where the main agent and the curing agent are mixed are provided. The mixing point 70 is formed at a starting end of the mixing liquid feeding passage 61, is connected with a terminal end of the main agent feeding passage 64 and a terminal end of the curing agent feeding passage 65, and is connected with a terminal end of the washing liquid feeding passage 66. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a two-component mixing apparatus, and more particularly, to a two-component mixing apparatus for coating that supplies two types of paint components to a coating apparatus provided in a coating robot or the like.

  When a two-component mixed paint such as urethane resin is used as a paint in a coating apparatus that performs a coating operation by spraying the paint, it is necessary to mix the main component and the curing agent as a paint component immediately before the application. . Therefore, conventionally, such a coating apparatus is connected to a two-liquid mixing apparatus that mixes two kinds of paint components and discharges the mixed liquid.

  Usually, the two-component mixing apparatus is supplied with a first paint component supply path through which a first paint component (for example, a main agent) is supplied and a second paint component (for example, a curing agent). A paint component supply path is provided, and a mixing point where the supplied paint components are mixed is formed. The mixed liquid supply path is connected at the mixing point, and the end of the mixed liquid supply path is connected to the spray nozzle of the coating apparatus. With such a configuration, in the two-component mixing device, the paint component as a mixed solution can be supplied to the spray nozzle while mixing each paint component, and a stable coating operation can be performed in the coating device. it can.

  By the way, in the above-described two-liquid mixing apparatus, the mixed liquid remaining in the mixed liquid supply path is washed or cleaned when the coating operation by the coating apparatus is completed or interrupted. Accordingly, the two-component mixing apparatus is provided with a separate cleaning component supply path for supplying the cleaning component to the mixed liquid supply path, and the mixed liquid supply path is cleaned with a solvent such as thinner. ing.

As a conventional two-component mixing apparatus, one that is configured to separately clean the first paint component supply path and the second paint component supply path is known. Is not preferable because it requires a large amount of cleaning liquid.
From this point of view, for example, Patent Document 1 discloses a mixing apparatus in which a paint tank and an operating air supply source are connected via a valve to pressure-feed paint to a coating apparatus (see Patent Document 1). . In this mixing apparatus, the above-described valve is connected to the coating apparatus via a supply path, and a mixing valve for mixing and feeding compressed gas and liquid solvent at a predetermined ratio is further connected to this valve. The supply path is cleaned by the cleaning component supplied from the mixing valve.
JP-A-6-91217

Indeed, according to the mixing device disclosed in Patent Document 1 described above, since the cleaning component is configured to be supplied from the mixing valve directly to the supply path through a short path, the paint component ( The paint) can be effectively cleaned to some extent.
However, the above-described Patent Document 1 does not disclose a specific configuration such as a supply path connected to the valve, a supply path from a paint tank, or the like. The arrangement of points and supply paths is unknown. That is, there is no disclosure about how the paint (mixed liquid) in the valve is cleaned by the cleaning component supplied from the mixing valve.
And if there is a part that is not sufficiently washed in the two-component mixing device, a part of the mixed liquid is solidified in such a part, solid matter adheres to the object to be coated, and the coating quality is reduced, This may cause the injection nozzle to be clogged.

  Accordingly, the present invention relates to a two-component mixing apparatus that solves the above-described conventional problems, and reduces the consumption of cleaning components and improves the efficiency of cleaning operations by reducing the number of parts that are not cleaned in the mixed solution supply path. The purpose is to propose a two-component mixing apparatus.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in the first aspect, in the two-component mixing apparatus that mixes two kinds of paint components and discharges them to the mixed liquid supply path, the first paint component supply path to which the first paint component is supplied, and the second The second paint component supply path to which the paint component is supplied, the cleaning component supply path to which the cleaning component for cleaning the mixed liquid supply path is supplied, the first paint component and the second paint component are mixed. And the mixing point is formed at the start of the mixed liquid supply path, and the end of the first paint component supply path and the end of the second paint component supply path are connected, The end of the cleaning component supply path is connected.

  According to a second aspect of the present invention, an adjustment valve that opens to the mixing point is disposed at each end of the first paint component supply path, the second paint component supply path, and the cleaning component supply path. It is.

  In claim 3, the first paint component supply path and the second paint component supply path have different path diameters in proportion to the flow rates of the first paint component and the second paint component. The first paint component and the second paint component supplied to the mixing point are formed to have the same pressure.

  A fourth aspect of the present invention is a painting robot provided with the two-liquid mixing device according to any one of the first to third aspects.

  As effects of the present invention, the following effects can be obtained.

  Since the cleaning component is supplied from the cleaning component supply path to the mixing point, the cleaning component can be immediately supplied to the mixed liquid supply path, and the path for supplying the cleaning component is shortened. The consumption of components can be reduced, and the number of parts that are not cleaned in the mixing point and the mixed solution supply path can be reduced, thereby improving the efficiency of the cleaning operation.

  With the configuration shown in claim 2, if the cleaning liquid is supplied to the mixing point, there is no portion that is not cleaned in the mixing point and the mixed liquid supply path, and the efficiency of the cleaning operation can be further improved.

  Since it is set as the structure shown in Claim 3, while preventing the backflow of a liquid mixture, the mixing ratio of the 1st coating material component in a liquid mixture and a 2nd coating material component can be made accurate and can be kept constant.

  Since it is set as the structure shown in Claim 4, the two-component mixing apparatus reduced in size can be attached to a coating gun etc., a maintenance becomes easy and workability | operativity improves.

Next, the best mode for carrying out the invention will be described.
FIG. 1 is a side view showing an overall configuration of a coating robot provided with a two-component mixing apparatus of the present embodiment, FIG. 2 is a diagram showing a connection configuration of the two-component mixing apparatus, and FIG. 3 is a two-component mixing apparatus. FIG. 4 is a front view of the two-component mixing apparatus, FIG. 5 is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 6 is a cross-sectional view illustrating the mounting structure of the main agent valve.

First, the overall configuration of the coating robot 1 provided with the two-component mixing apparatus 100 of the present embodiment will be outlined below.
As shown in FIG. 1, the painting robot 1 is configured as a vertical articulated robot in which a plurality of arm portions are movable in the vertical direction. Specifically, the base 10 and the base are fixed. The first arm portion 11 is attached to the first arm portion 11 so as to be rotatable and swingable, and the second arm portion 12 is connected to the first arm portion 11 so as to be swingable. A coating gun 2 as a coating device is provided at the tip of the second arm portion 12. By rotating or swinging the arm portions 11 and 12 of the painting robot 1, the coating gun 2 provided on the second arm portion 12 is moved relative to the object to be coated. Paint is applied to the predetermined place.

  The coating gun 2 is an automatic spray gun type, and is configured such that the paint supplied from the two-liquid mixing device 100 is sprayed through the spray nozzle 20 when the trigger is ON / OFF controlled. . The coating gun 2 is equipped with a two-liquid mixing device 100, and a two-liquid mixing device 100, an injection nozzle 20, and the like via a mixed liquid hose 21 connected to the two-liquid mixing device 100 as will be described later. Are connected, and the mixed liquid in which the main agent and the curing agent are mixed is injected from the injection nozzle 20 (see FIG. 2).

  As shown in FIG. 2, the two-component mixing apparatus 100 is connected to a plurality of main agent tanks 33, 33,... In which a main agent as a first paint component is stored, and communicates with one of the main agent tanks 33. Connected to a paint supply device 30 configured to be switchable, a curing agent tank 31 in which a curing agent as a second paint component is stored, and a cleaning liquid supply device 32 configured to be able to supply a cleaning liquid as a cleaning component Has been.

The paint supply device 30 includes various pumps such as a pressure feed tank and a diaphragm pump, and is connected to the two-component mixing device 100 via a main agent hose 34 as a paint component supply path. This paint supply device 30 is provided with a switching valve (not shown) that switches communication between the plurality of main agent tanks 33, 33... And the main agent hose 34, and the main agent supplied to the two-component mixing device 100 is appropriately selected. It is configured to be switched. However, the configuration of the coating material supply device 30 is not limited to the configuration of the present embodiment as long as it is connected to the main agent tank 33 in which at least one kind of main agent is stored.
Further, the curing agent tank 31 is connected to the two-component mixing apparatus 100 via a curing agent hose 35 as a paint component supply path.

The cleaning liquid supply device 32 is connected to the two-liquid mixing apparatus 100 via a cleaning liquid hose 36 as a cleaning component supply path, and the cleaning liquid sent to the two-liquid mixing apparatus 100 via the cleaning liquid hose 36 is a mixed liquid. The inside of the mixed solution hose 21 is washed by being pumped to the use hose 21.
In addition, although organic solvents, such as thinner, are used as a cleaning liquid, this cleaning liquid is suitably changed according to the paint component used. In this embodiment, in order to clean the mixed solution hose 21, the cleaning liquid supply unit 32 is configured to pump the cleaning liquid alone. For example, the cleaning liquid and the air are alternately pumped. Alternatively, the cleaning liquid and air may be mixed and pumped. In particular, the cleaning liquid supply device 32 is configured such that the cleaning liquid hose 36 is connected to the two-liquid mixing apparatus 100, but an air hose (not shown) may be connected to the two-liquid mixing apparatus 100.

  The paint supply device 30, the curing agent tank 31, and the cleaning liquid supply device 32 are installed outside the painting robot 1, but may be configured to be attached to the painting robot 1. In any case, in each device, the coating material supply device 30 is connected to the two-component mixing device 100 via the main agent hose 34, and the curing agent tank 31 is two-component via the curing agent hose 35. The cleaning liquid supply device 32 is connected to the mixing device 100 and is connected to the two-liquid mixing device 100 via the cleaning liquid hose 36.

Next, the configuration of the two-component mixing apparatus 100 of the present embodiment will be described in detail below.
As shown in FIGS. 3 and 4, the two-component mixing apparatus 100 includes a port manifold having a mixture liquid output port 41, a main agent input port 44, a curing agent input port 45, and a cleaning liquid input port 46. 100a and a valve manifold 100b that is connected to the port manifold 100a and to which the main agent valve 54, the curing agent valve 55, and the cleaning liquid valve 56 are attached are integrally assembled.

In the port manifold 100a, an input port is formed in the upper plane along a linear direction. In this embodiment, a main agent input port 44, a hardener input port 45, and a cleaning liquid input port 46 are formed. ing. The main agent hose 34 is attached to the main agent input port 44 via an attachment member (not shown), and the paint fed by pressure from the paint supply device 30 (main agent tank 33) is supplied to the two-component mixing device 100. . Similarly, the hardener hose 35 is attached to the hardener input port 45 via an attachment member (not shown), and the hardener pumped from the hardener tank 31 is supplied to the two-component mixing apparatus 100. It is comprised so that. The cleaning liquid hose 36 is attached to the cleaning liquid input port 46 via a mounting member (not shown) so that the curing agent pumped from the cleaning liquid supply device 32 is supplied to the two-liquid mixing device 100. It is configured.
A mixed solution output port 41 is formed in one side surface of the port manifold 100a, and the mixed solution hose 21 is attached to the mixed solution output port 41 via a mounting member (not shown) to thereby supply two liquids. The mixed solution is sent out from the mixing device 100.

For supplying the main agent supplied from the main agent input port 44, the curing agent input port 45, and the cleaning liquid input port 46 to the mixed liquid output port 41 in the port manifold 100a and the valve manifold 100b. A supply path is drilled. Specifically, a main agent supply path 64 as a paint component supply path extends from the main agent input port 44, and a curing agent supply path 65 as a paint component supply path extends from the hardener input port 45. A cleaning liquid supply path 66 as a cleaning component supply path extends from the cleaning liquid input port 46.
In the two-component mixing apparatus 100 of the present embodiment, the main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply path 66 are configured to intersect at one point at the mixing point 70 provided in the valve manifold 100b. ing.

  The mixing point 70 is provided at substantially the center of the valve manifold 100b. As described above, the terminal ends of the main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply path 66 join at the mixing point 70. Being connected. Further, a mixed solution supply path 61 extends from the mixing point 70 and reaches the mixed solution output port 41 of the port manifold 100a. That is, the start end of the mixed liquid supply path 61 is joined and connected to the terminal ends of the main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply path 66 via the mixing point 70. In this way, the mixing point 70 is formed at the start end of the mixed liquid supply path 61, and the terminal end of the main agent supply path 64 and the terminal end of the curing agent supply path 65 are connected, and the terminal end of the cleaning liquid supply path 66 is connected. ing.

  The valve manifold 100b is assembled so as to be in contact with the port manifold 100a at a flat surface, and the main agent valve 54 as an adjustment valve for controlling the flow rate of the main agent to the mixing point 70 described above, curing. An agent valve 55 and a cleaning liquid valve 56 are respectively attached. Specifically, as schematically shown in FIG. 5, valve mounting holes 53, 53, and 53 are formed in the upper surface and the left and right side surfaces of the valve manifold 100b, respectively, and the valve is formed in the upper surface. The main agent valve 54 is attached to the attachment hole 53, and the curing agent valve 55 and the cleaning liquid valve 56 are attached to the valve attachment holes 53 and 53 formed in the left and right side surfaces, respectively.

The main agent valve 54, the curing agent valve 55, and the cleaning liquid valve 56 are located at the terminal ends of the corresponding supply paths 64, 65, and 66, and are disposed so as to open to the mixing point 70. That is, the main agent valve 54 is disposed at the end of the main agent supply path 64, the curing agent valve 55 is disposed at the end of the curing agent supply path 65, and the cleaning liquid valve 56 is disposed at the end of the cleaning liquid supply path 66. Yes.
As described above, the two-component mixing apparatus 100 is arranged such that the main agent valve 54, the curing agent valve 55, and the cleaning liquid supply path 66 open to the mixing point 70, respectively. The main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply path 66 and the mixing point 70 are switched by the curing agent valve 55 and the cleaning liquid supply path 66.

  Here, the mounting structure of the main agent valve 54, the curing agent valve 55, and the cleaning liquid valve 56 will be outlined below. In the present embodiment, diaphragm valves having substantially the same shape are used for the main agent valve 54, the curing agent valve 55, and the cleaning liquid valve 56, respectively. Hereinafter, the configuration of the main agent valve 54 will be described, but the configurations of the other curing agent valve 55 and the cleaning liquid valve 56 are substantially the same.

  As shown in FIG. 6, the main agent valve 54 is provided at the end of the main agent supply path 64 so as to cut the path from the mixing point 70, and is mortar-shaped from the side surface of the valve manifold 100 b toward the center. It is attached to a valve attachment hole 53 formed in the hole. Specifically, the main agent valve 54 is fixed to the valve mounting hole 53 by the support frame 80, and slides up and down in close contact with the cylinder 81 provided in the support frame 80 and the inner peripheral surface of the cylinder 81. A piston 82 provided freely, a rod 83 that is integrally formed with the piston 82 and is slidable in the vertical direction in conjunction with the piston 82, and is attached to the opening end of the cylinder 81, and the rod 83 is provided at the axial center. The support member 84 is inserted into the rod 83, and a diaphragm 85 is attached to one end of the rod 83 on the end opposite to the connection side with the piston 82.

  The support frame 80 is attached to the valve manifold 100b so as to cover the opening of the valve attachment hole 53 in plan view. The cylinder 81 is formed inside the support frame 80 and is formed as a hollow portion having a substantially cylindrical cross section.

  The piston 82 is disposed so as to be in close contact with the inner peripheral surface of the cylinder 81 via an O-ring 82a provided on the outer peripheral surface. The piston 82 is urged toward the opening end of the cylinder 81 by a coil spring 86 provided between the piston 81 and the closed end of the cylinder 81, and the cylinder 82 resists the urging force of the coil spring 86 by an actuator (not shown). It is supported so as to be movable in the direction of the closed end. Thus, the piston 82 is slidable in the axial direction (vertical direction) along the inner peripheral surface of the cylinder 81 by ON / OFF control of the actuator. The actuator is controlled by a control device (not shown) provided in the coating gun 2.

  The rod 83 is attached to the center of the bottom of the piston 82, and protrudes so that one end thereof can advance and retreat with respect to the valve attachment hole 53 as the piston 82 moves. One end of the rod 83 protrudes in the center of the valve manifold 100 b, that is, in the direction of the mixing point 70 through an insertion hole 84 a formed in the support member 84.

  The support member 84 is attached to the opening end of the support frame 80. With the support frame 80 attached to the valve manifold 100b, the support member 84 is in close contact with the side opening edge of the valve attachment hole 53 and the support frame 80 and The opening of the valve mounting hole 53 is closed. Further, as described above, the support member 84 is provided with the insertion hole 84a at the center of the shaft, and the rod 83 is slidably inserted along the axial direction into the insertion hole 84a.

  The diaphragm 85 is attached to one end of the rod 83 and a protruding end from the support member 84, and is formed at the distal end portion 85a, the film portion 85b formed around the distal end portion 85a, and the outer edge of the film portion 85b. It is comprised with the fixed part 85c made. The diaphragm 85 is fixed so that the front end portion 85a is attached to one end of the rod 83, and the fixing portion 85c is sandwiched between the support member 84 and the step portion formed on the inner peripheral surface of the valve mounting hole 53. Yes. Thus, the diaphragm 85 is provided in the internal space of the valve mounting hole 53 closed by the support member 84.

  The diaphragm 85 is slid in the axial direction in conjunction with the movement of the rod 83, and the tip 85a is inserted into a communication hole 70a formed between the main agent supply path 64 and the mixing point 70, whereby the main agent supply path 64 and the mixing point 70 can be switched. Specifically, when the rod 83 is slid and pushed toward the center of the valve manifold 100b, the tip end portion 85a of the diaphragm 85 is inserted into the communication hole 70a, the communication hole 70a is closed, and the main agent supply path 64 is inserted. And the mixing point 70 are cut. On the other hand, when the rod 83 is slid and moved in the outward direction of the valve manifold 100b, the distal end portion 85a of the diaphragm 85 is withdrawn from the communication hole 70a, the communication hole 70a is opened, and the main agent supply path 64 and The mixing point 70 is communicated.

  In addition, the distal end portion 85a of the present embodiment is formed of a member having elasticity, and a tapered surface is formed so as to have a tapered shape. By adopting such a shape, when the distal end portion 85a is inserted into the communication hole 70a, the tapered surface of the distal end portion 85a can be brought into close contact with the opening edge portion of the communication hole 70a, and the communication hole 70a is completely formed. Can be closed.

3 and 4, in the two-component mixing apparatus 100, a liquid leakage prevention plug 88 for preventing liquid leakage from the main agent input port 44, the curing agent input port 45, and the cleaning liquid input port 46 is provided. Is provided. Specifically, the liquid leakage prevention plug 88 is connected to the middle part of the main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply path 66, and is a side surface of the port manifold 100a and outputs the mixed liquid. The plug paths 89, 89, and 89 are respectively inserted into the side surfaces where the ports 41 are provided (see FIG. 6). By removing the liquid leakage prevention plug 88 from the plug path 89, surplus main agent and the like can be discharged from the main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply path 66. The main agent and the like can be prevented from leaking from the input port 45 and the cleaning liquid input port 46.
In the two-component mixing apparatus 100, for example, a mixer for mixing the main agent and the curing agent may be provided.

  In the above-described configuration, when the painting robot 1 is operated and a painting operation is performed with the painting gun 2, the diaphragm 85 of the main agent valve 54 and the hardener valve 55 is used in the two-liquid mixing apparatus 100. Is moved, the communication hole 70 a is opened, and the main agent supply path 64 and the curing agent supply path 65 are communicated with the mixing point 70. Therefore, in the main agent valve 54, the main agent is supplied from the main agent hose 34 to the mixing point 70 through the main agent supply path 64, and also in the hardener valve 55, the hardener supply path 65 passes from the hardener hose 35. Then, the curing agent is supplied to the mixing point 70. At the mixing point 70, the main agent and the curing agent are mixed to form a two-liquid mixture. The mixed liquid as the paint mixed in this way is sent from the mixing point 70 to the mixed liquid supply path 61, and is sent to the injection nozzle 20 through the mixed liquid hose 21 connected to the output port 41. .

On the other hand, when the painting operation is interrupted and the mixed solution supply path 61 and the mixed solution hose 21 are cleaned, the diaphragm 85 of the main agent valve 54 and the hardener valve 55 is used in the two-component mixing device 100. Is moved, the communication hole 70a is closed, the main agent supply path 64 and the curing agent supply path 65 are disconnected from the mixing point 70, and the diaphragm 85 of the cleaning liquid valve 56 is moved to open the communication hole 70a. The cleaning liquid supply path 66 communicates with the mixing point 70.
In such a state, supply of the cleaning liquid from the cleaning liquid supply device 32 to the two-liquid mixing device 100 via the cleaning liquid hose 36 is started, and eventually the cleaning liquid is mixed from the cleaning liquid valve 56 to the mixing point 70 via the cleaning liquid supply path 66. Sent to. The cleaning liquid sent to the mixing point 70 in this way is a mixed liquid hose connected to the output port 41 while cleaning the mixed liquid (main agent and curing agent) remaining in the mixing point 70 and the mixed liquid supply path 61. 21 to the injection nozzle 20.

As described above, in the two-component mixing apparatus 100 of the present embodiment, the mixing point 70 is formed at the start end of the mixture supply path 61 and the end of the main agent supply path 64 and the end of the curing agent supply path 65 are connected. At the same time, since the end of the cleaning liquid supply path 66 is connected, the mixing point 70 and the starting end of the mixed liquid supply path 61 are made to coincide with each other, and the main agent supply path 64 and the curing agent supply path are connected to the mixing point 70. When the cleaning liquid is supplied to the mixing point 70, the cleaning agent can be immediately supplied to the mixed liquid supply path 61, the path for supplying the cleaning agent can be shortened, and the consumption of the cleaning liquid can be reduced. At the same time, the portions that are not cleaned in the mixing point 70 and the mixed liquid supply path 61 can be reduced, and the efficiency of the cleaning operation can be improved.
In particular, the two-component mixing apparatus 100 according to the present embodiment includes the main agent valve 54, the curing agent so as to open to the mixing point 70 at the end of the main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply path 66. Since the cleaning valve 55 and the cleaning liquid valve 56 are provided, if the cleaning liquid is supplied to the mixing point 70, there is no portion that is not cleaned in the mixing point 70 and the mixed liquid supply path 61. It can be improved.

  Further, in the two-component mixing apparatus 100, the main agent valve 54, the curing agent valve 55, and the cleaning liquid valve 56 are integrally assembled in the valve manifold 100b, and the main agent supply path 64, the curing agent supply path 65, and the cleaning liquid supply are provided. The path 66 is formed in a compact manner, so that the size of the apparatus is reduced as a whole. Therefore, it can be easily mounted on the painting gun 2 of the painting robot 1 and the two-component coating device 100 is provided in the painting robot 1 (painting gun 2), thereby facilitating maintenance and workability. Will improve.

By the way, the paint of the present embodiment is mainly a two-component urethane paint or epoxy paint as a paint component, and a predetermined amount of curing agent is mixed with the main agent, and the mixing ratio is a weight ratio. The main agent / curing agent is prepared to be 2 to 10: 1.
Therefore, in the two-component mixing apparatus 100, preferably, the main agent supply path 64 and the curing agent supply path 65 have a large path diameter (including the diameter of the communication hole 70a connected to the main agent supply path 64 and the curing agent supply path 65). The pressures of the main agent and the curing agent supplied to the mixing point 70 are made equal to each other by making them different in proportion to the flow rates of the main agent and the curing agent. Specifically, since the flow rate of the main agent is larger than the flow rate of the curing agent, it is preferable that the path diameter of the curing agent supply path 65 is smaller than the main agent supply path 64 in proportion to the flow rate. .
However, as described above, in the two-component mixing apparatus of the present embodiment, the main agent supply path 64, the curing agent supply path 65, and the mixing point 70 are connected via the communication hole 70a. Compared to the hole diameter of the communication hole 70 a between the mixing point 70 and the mixing point 70, the hole diameter of the communication hole 70 a between the curing agent supply path 64 and the mixing point 70 is formed to be larger. The same applies to the main agent hose 34 and the curing agent hose 35.

  That is, since the coating materials used in this embodiment have different mixing ratios of the main agent and the curing agent, the flow rates of the main agent and the mixing agent supplied to the mixing point 70 are also different, and the same in the main agent supply path 64 and the curing agent supply path 65. When the path diameter is set, in the curing agent supply path 65 with a small flow rate, the pressure of the curing agent supplied to the mixing point 70 becomes low, and the mixed liquid flows backward to the curing agent supply path 65 side or is mixed at a predetermined mixing ratio. There is a problem that it may not be performed. In this respect, by reducing the diameter of the curing agent supply path 65 as compared with the main agent supply path 64 and making the pressure of the main agent and the curing agent supplied to the mixing point 70 substantially equal, the backflow of the mixed liquid is prevented. At the same time, the mixing ratio of the main agent and the curing agent in the mixed solution can be made accurate and constant.

In the two-component mixing apparatus 100 of the present embodiment, as described above, the main agent valve 54, the curing agent valve 55, and the cleaning solution valve 56 are configured by diaphragm valves having substantially the same shape. One or all of the valves may be constituted by, for example, a needle valve instead of the diaphragm valve.
Further, the arrangement configuration of the main agent valve 54, the curing agent valve 55, and the cleaning liquid valve 56 is not limited to the configuration shown in the present embodiment.

The side view which showed the whole structure of the robot for a coating provided with the 2 liquid mixing apparatus of a present Example. The figure showing the connection structure of a two-component mixing apparatus. The top view of a two-component mixing apparatus. The front view of a two-component mixing apparatus. AA arrow sectional drawing in FIG. Sectional drawing showing the attachment structure of the valve | bulb for main agents.

Explanation of symbols

41 Output Port 44 Main Agent Input Port 45 Curing Agent Input Port 46 Cleaning Fluid Input Port 54 Main Agent Valve 55 Curing Agent Valve 56 Cleaning Fluid Valve 61 Mixed Liquid Supply Path 64 Main Agent Supply Path (First Paint Component Supply Path)
65 Curing agent supply path (second paint component supply path)
66 Cleaning liquid supply path (cleaning component supply path)
70 Mixing point 100 Two-component mixing device 100a Manifold for port 100b Manifold for valve

Claims (4)

In a two-component mixing device that mixes two kinds of paint components and discharges them to a mixed solution supply path,
A first paint component supply path through which the first paint component is supplied;
A second paint component supply path through which the second paint component is supplied;
A cleaning component supply path to which a cleaning component for cleaning the mixed liquid supply path is supplied;
A mixing point where the first paint component and the second paint component are mixed is provided,
The mixing point is formed at the start of the mixed liquid supply path, and the end of the first paint component supply path and the end of the second paint component supply path are connected, and the end of the cleaning component supply path is A two-component mixing apparatus characterized by being connected.   An adjustment valve that opens to the mixing point is disposed at each end of the first paint component supply path, the second paint component supply path, and the cleaning component supply path. 2. The two-component mixing apparatus according to 1.   The first paint component supply path and the second paint component supply path are supplied to the mixing point with different path diameters in proportion to the flow rates of the first paint component and the second paint component. The two-component mixing apparatus according to claim 1 or 2, wherein the first coating component and the second coating component are formed to have equal pressures.   A painting robot provided with the two-liquid mixing device according to any one of claims 1 to 3.

Images