JPH0532110B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention selectively accepts a paint of any color from a group of multi-color paints on the primary side, and adds additives such as a solvent and a curing agent. The present invention relates to a paint converting and mixing unit used for viscosity-mixing the paint to produce the required paint and sending it to the coating machine.

"Prior Art" and "Problems to be Solved by the Invention" Generally, in order to send paint to a coating machine such as a spray gun, the required paint is sent out using a needle valve that is turned on and off by air pressure. A paint delivery unit is used which stops the delivery. However, the conventional paint delivery unit described above is a dedicated unit for handling only a single color of paint.For example, in the painting process of an automobile body, extremely large number of colors of paint, such as 12 to 13 colors, are sequentially required. Each paint machine is provided with a group of paint delivery units corresponding to the number of paint colors required, and the paint delivery units are sequentially operated according to the painting procedure to paint the car body.

Therefore, the paint delivery unit group required for car body painting is extremely heavy (the weight of a single paint delivery unit is approximately 500 grams), so in a normal painting robot, the above-mentioned paint delivery unit is placed near the paint machine at the end of the arm for mechanical strength reasons. This makes it difficult to install a group of paint delivery units, and it becomes necessary to unnecessarily increase the size and strength of the painting robot. Alternatively, a measure is taken in which the group of paint delivery units is fixed near the wall of the paint factory and connected to the paint machine with a long hose.
When cleaning the remaining paint in the hose every time the paint color is changed, the waste of paint increases, a lot of time is consumed in changing the paint color, and there is a risk of color mixing due to wear of the needle valve. There are some difficulties.

On the other hand, the viscosity and mixing of paint is often done manually at the painting site, but there are health and safety issues due to the viscosity and organic solvents used during mixing, and in order to accommodate mass-produced painting, for example, mechanical Paint mixers such as stirring devices are often used, and there are many known examples.

However, the above-mentioned known examples have a common drawback that some of them have insufficient viscosity and mixing functions, and furthermore, they lack washability when changing paint colors.

The present invention aims to overcome the difficulties of the prior art in coating conversion and viscosity mixing.

``Means for Solving the Problems'' The present invention achieves the above-mentioned objects, in which the second half of the single rod-shaped main part 1 is the paint converting part 2, and the first half of the main part 1 is the main part 1 that sends out the tip. The viscosity mixing part 3 has a cavity 12 along the axis that forms a hole 16, and the paint converting part 2 has a cavity 4 of a paint flow path communicating with the cavity 12, and A paint conversion shaft 5 having a single paint passage hole 6 penetrating the peripheral wall and communicating with the hollow part 4 is mounted so as to be rotatable along the axis, and the paint passage hole 6 is provided in the wall of the main part 1. 7 groups of paint supply ports are arranged radially with respect to the cross section of the main part 1, and further communicate with the paint conversion part 2.
The main part 1 is provided with an additive flow path 10 that communicates with the cavity 12 and with an additive supply port 9 penetrating the wall of the main part 1, and also connects a group of 7 paint supply ports. In both cases, a detergent port 11 is provided which communicates with the hollow part 4 in a state where the communication with the hollow part 4 is cut off. An agitating blade 14 is provided which is fixed to a rotary shaft 13 which is supported through the main part 1 and whose rear end is connected to a separate driving part 21 at the rear of the main part 1. It is characterized by a structure in which the paint sent to the hollow part 4 and the additive from the additive supply port 9 are sent to the viscosity mixing part 3, mixed to a viscosity by the stirring blade 14, and sent out from the delivery hole 16. .

"Function" The paint conversion/mixing unit of the present invention having the above-mentioned configuration has one of the seven groups of paint supply ports provided radially on the wall of the paint conversion section 2, and one internally installed in the center of the paint conversion section 2. Paint through hole 6 of paint conversion shaft 5
are communicated by the rotation set of the paint conversion shaft 5, the paint of one color is supplied from the communicated paint supply port 7 through the hollow part 4 to the cavity part 12 of the viscosity mixing part 3. , the additive for the paint of that alternative color is supplied from the additive supply port 9 to the additive flow path 10.
The mixture is supplied to the cavity 12 through the stirring blade 14, and the mixture is mixed to a viscous consistency by the stirring blade 14, and then sent out from the delivery hole 16.

When the paint conversion shaft 5 is rotated and set, other paint supply ports 7 are selectively communicated with the hollow portion 4, so that paint color conversion can be performed freely according to the number of paint supply ports 7.

Furthermore, when changing the paint, the detergent is sent from the detergent port 11 to the hollow part 4 and the viscosity mixing part 3 with the hollow part 4 disconnected from any of the paint supply ports 7 groups. Since the inside of the cavity 12 can be cleaned quickly and accurately by the agitating blade 14, the paint color can be quickly and accurately changed and delivered.

"Example" Hereinafter, a detailed explanation will be given with reference to an example. Referring to FIG. 1 showing an embodiment of the present invention, the paint conversion and mixing unit of the present invention has a main part 1 which is a single rod-shaped body, the latter half of which is a paint conversion part 2, and the first half of which is a viscosity mixing unit. The paint converting section 2 and the viscosity mixing section 3 are integrally connected along the axis 1' of the main section 1.

A paint converting shaft 5 is attached to the paint converting section 2 and is arranged coaxially with the shaft center 1' and passing through the center of the paint converting section 2 in the front-rear direction. That is, the paint conversion shaft 5 is a shaft body serving as a paint flow path, and is a hollow shaft having a hollow part 4 with an open front end 5' and a closed rear end, and a hollow part cut out from the peripheral wall at an intermediate position. A single paint passage hole 6 communicating with the paint hole 4 is provided.

Further, in the main part 1 facing the paint passage hole 6, paint supply ports 7A to 7H that penetrate the wall of the main part 1 in the radial direction and are arranged radially with respect to the same cross section of the main part 1 are provided. When the paint conversion shaft 5 is rotated, a single paint passage hole 6 communicates with one of the paint supply ports 7A to 7H, and is connected to the paint supply port. Paint of any color is fed from the primary paint pipe 8 into the hollow part 4 via the paint passage hole 6, and is fed into the viscosity mixing part 3 from the front end of the hollow part 4.

Further, at key points on the outer periphery of the main portion 1, additive supply ports 9A9B for a curing agent, diluting thinner, etc. to be mixed with the paint are formed, and a paint conversion shaft 5 is formed.
Between the outer periphery of
2 is formed. Then, the paint conversion shaft 5 rotates and the paint supply port 7A
When a paint of any color is fed from any one of the groups 7H to 7H, the additives necessary for the paint are fed from the additive supply ports 9A and 9B, and the flow path 10
from the outer periphery of the paint conversion shaft 5 to the viscosity mixing section 3 via
It is designed so that it is fed under the same pressure.

In addition, a detergent port 1 is located near the rear end of the main part 1.
1 is provided, and when the paint conversion shaft 5 is rotated and stopped at a predetermined position, the paint supply port 7A is
7H are closed from communicating with the paint passage hole 6, and at the same time, only the detergent port 11 and the hollow portion 4 of the paint conversion shaft 5 are communicated with each other.

On the other hand, the viscosity mixing part 3 has a hollow cylindrical shape, and its cavity 12 communicates with the hollow part 4 of the paint conversion shaft 5 and the additive flow path 10, and receives the paint and additives that have been pumped in. It consists of a paint pool. A rotating shaft 13 passing through the main portion 1 along the axis 1' is supported, and a stirring blade 14 is provided on the rotating shaft 13 in the cavity 12 and fixed concentrically at an angle. . The rotating shaft 13 is the paint conversion shaft 5.
It is loosely inserted into the hollow part 4 and penetrates through it, and its end protrudes from the rear end of the main part 1 and is connected to a separate drive part 21 .

Further, at the front end of the cavity 12, a paint delivery hole 16 is formed in a closing plate 15 that closes the cavity 12.

The stirring blades 14 are independently rotated continuously or intermittently by the drive unit 21, and the viscosity mixing unit 3
The paint and additives are sufficiently stirred and mixed to make it viscous, and then they are sequentially forced forward and sent out from the delivery hole 16, and the resulting paint with the desired properties is sprayed through the delivery port 20 at the front end. It is configured to be sent to a painting machine such as a gun.

In addition, 17 in the figure accurately positions the rotation stop position of the paint conversion shaft 5, and connects the paint supply ports 7A to 7A.
7H and a rotary positioning part that ensures accurate communication with the paint passage hole 6, and 18 is a hollow part 12 of the viscosity mixing part 3.
19 is a pressure sensor unit that detects the paint pressure inside the tank and when it exceeds the steady pressure, overflows and returns the paint pressure to keep the paint pressure constant and aim for steady paint delivery. It is a rotating core part that allows

The paint conversion and mixing unit of the present invention having the above configuration has a primary side pipe 8 for different paints and an additive supply port 9A for each of the paint supply ports 7A to 7H.
A curing agent and dilution thinner supply pipe is connected to 9B, a cleaning air thinner pipe is connected to the cleaning agent supply port 11, and a paint delivery pipe is connected to the delivery port 20 at the front end. It is placed just in front of the paint sprayer.

Then, by rotating the paint conversion shaft 5, a paint of an arbitrary color is selected from the paint group on the primary side, received in the hollow portion 4 of the paint conversion shaft 5, and sequentially sent to the viscosity mixing section 3. Additives such as diluent thinner and curing agent necessary for the paint selected by the paint conversion shaft 5 are fed into the viscosity mixing section 3 in the required amount at the same pressure as the paint. The paint is continuously stirred and mixed and sent forward one after another, and the necessary and sufficiently viscous mixed paint is continuously supplied from the delivery port 20 at the end.

When changing the paint color, the group of paint supply ports 7 and the paint passage holes 6 are shut off, and at the same time, air thinner for cleaning is pumped through the cleaning agent port 11. , is stirred within the cavity 12 of the viscosity mixing section 3, and is sent out from the delivery port 20, so that the previously used paint flows through the flow path, the stirring blade 14, and the cavity 12.
All the inside surfaces etc. will be washed. Then, by rotating the paint conversion shaft 5, the next paint can be selected, and normal painting work using the next paint can be started immediately.

The paint conversion and mixing unit of the present invention has both a paint conversion function and a viscosity mixing function in a single unit, and since both are integrated and compact, it can be used for a wide variety of primary side paints. For example, in an automobile body painting line, it is possible to select any paint by a single unit, mix the viscosity to the required conditions, and send it out. Unlike conventional techniques, there is no need to provide a paint unit for each paint or an independent viscosity mixer, and the coating equipment can be made much simpler and more compact. Therefore, the paint conversion and mixing unit of the present invention can be installed near a painting robot or a coating machine, and the paint conversion and cleaning operations can be performed sequentially according to a predetermined program, so that multi-color painting such as automobile body painting can be performed. The line can be streamlined significantly.

Furthermore, the paint conversion mixing unit of the present invention comprises:
Cleaning and paint conversion can be done in one touch only by rotating the paint conversion shaft 5, which has an excellent effect of speeding up the paint color conversion and allowing immediate conversion.Furthermore, it is almost integrated with a coating machine such as a spray gun. Because it can be used as a paint converter, there is less paint remaining in equipment and pipes due to paint conversion, reducing paint loss due to cleaning, and the cleaning action is sufficient, there is no risk of color mixing due to the structure, and it is an alternative to multi-color paints. This has advantages such as stable target transmission performance.

``Effects of the Invention'' As explained above, the paint conversion and mixing unit of the present invention is a compact single unit that can be used in a painting line where paints are selectively selected from a group of paints and sequentially converted. Since it performs paint conversion and viscosity mixing functions, the coating equipment can be made much simpler and more compact, and it has many effects such as instant conversion of paint, improving coating productivity and promoting rationalization. be.

[Brief explanation of drawings]

Figure 1: Shows a paint conversion and mixing unit according to an embodiment of the present invention, A is a front perspective sectional view showing the entire unit, B is an AA sectional view of A, C is a BB sectional view of A,
D is a CC sectional view of A, E is a DD sectional view of A Main symbols, 1: main part, 2: paint conversion part, 3: viscosity mixing part, 4: hollow part, 5: paint conversion axis, 6: Paint hole, 7A-7H: Paint supply port, 9A9
B: Additive supply port, 10: Additive flow path, 1
1: Detergent port, 12: Cavity, 13: Rotating shaft, 14: Stirring blade, 16: Delivery hole, 20: Delivery port, 21: Drive unit.

Claims (1)

[Claims] 1 The second half of a single rod-shaped main part 1 is a paint converting part 2, and the first half of the main part 1 is a viscosity mixing part 3 having a hollow part 12 whose tip is a delivery hole 16 along the axis. The paint conversion part 2 has a hollow part 4 of a paint flow path communicating with the cavity part 12, and a single paint passage hole 6 communicating with the hollow part 4 is provided through the peripheral wall. A paint conversion shaft 5 is rotatably mounted along the axis, and a group of 7 paint supply ports that selectively communicate with the paint passage holes 6 are provided on the wall of the main part 1 in a cross section of the main part 1. Further, in the main part 1 of the paint converting part 2, additives are arranged in a radial manner to communicate with the cavity part 12 and with an additive supply port 9 provided through the wall of the main part 1. A flow path 10 is provided, and a detergent port 11 is provided which communicates with the hollow portion 4 in a state where all of the paint supply ports 7 are disconnected from the hollow portion 4. A stirring blade 14 is provided in the hollow part 12 of the mixing part 3 and is fixed to a rotating shaft 13 that is supported through the hollow part 4 and whose rear end is connected to a separate drive part 21 at the rear of the main part 1. , paint supply port 7
The paint selected from one of the groups and sent to the hollow part 4 and the additive from the additive supply port 9 are sent to the viscosity mixing part 3, mixed to a viscosity by the stirring blade 14, and then sent to the delivery hole. A paint conversion and mixing unit characterized by a structure in which the paint is sent out from the 16.