CN1883969A - Paint mixing equipment - Google Patents

Abstract

The invention relates to the technical field of mechanical equipment, in particular to paint blending equipment for blending paint colors. The paint blending equipment comprises a container individual for containing basic color paint, wherein an oil discharging device is arranged on the container individual, the oil discharging device comprises a valve and a driving mechanism linked with the valve, namely the driving mechanism drives the valve to connect or block the container individual and an outlet; and a light detector is arranged at the outlet. The invention calculates the volume of the paint flowing out of the outlet through the light detector, feeds back signals to the processor, and controls the driving mechanism by the processor so as to control the opening or closing of the valve. The invention adopts the mature high-precision light detection technology as the paint flow detection device, so that the paint flow can be controlled within a very small error range to ensure that the color of the prepared paint is correct.

Description

Paint mixing equipment

Technical field:

The invention relates to the technical field of mechanical equipment, in particular to a paint mixing equipment for mixing paint colors.

Background technique:

People use paint when decorating houses, making furniture or other products. According to different needs or personal preferences, users will choose paints of different colors. Due to the limited variety of paint colors sold by general manufacturers, it is difficult to meet people's needs, so people mix paints of different colors in a certain proportion according to their own needs, thereby forming a new color paint. Here we call the paint used for blending as the basic color paint. Traditional paint mixing is done manually. Operators usually get the color they want based on their own experience or different experiments. But, obviously, there is very big deficiency in this way: the color blending process is cumbersome; the color of the second blending paint is likely to have an error with the color of the first blending.

In order to solve the above problems, some manufacturers have designed automatic paint color matching equipment, which stores many colors calculated by computers, and records the consumption of different basic color paints required by each color paint. Users only need to choose the color they like, and after inputting it into the computer, the device will automatically match various basic color paints. This equipment has solved people's long-standing problems to a large extent and brought great convenience to people.

Usually this kind of equipment uses white paint as the basic raw material, and it is matched with various basic color paints. By mixing different amounts of base color paint into the white base stock, the base stock appears the desired color. See Fig. 1, at present this kind of paint mixing equipment mainly consists of a base 10 and several individual container 11 for accommodating basic color paint. The individual containers 11 are distributed above the base 10 in a circular shape, and the base 10 drives the entire individual container to rotate through a motor. Each individual container is filled with paint of different basic colors. According to the color information input into the computer, it will control the rotation of different container individual 11 to the position of oil discharge. The user uses the ratio calculated by the computer to select different container individual 11 Discharge a certain amount of paint into the basic raw material bucket, and finally mix it evenly to get the paint of the required color.

Although the above-mentioned equipment has solved many problems of people to a certain extent, it still has certain deficiencies. In order to ensure the correctness of the paint color being formulated, the amount of basic color paint must be accurate. Sometimes, small errors can cause deviations in the final color. However, most of the oil discharge devices of the individual container 11 currently have a problem of insufficient precision. See Fig. 2, this is the oil outlet device that a kind of deployment equipment adopts at present. It has a scale 111 , a control valve 112 and a graduated cylinder 113 . Its working principle adopts the working principle of the syringe, that is, firstly pull up the piston in the measuring cylinder 113 according to the amount displayed by the computer, and stop after pulling up to a certain height according to the scale 111, and then start the control valve 112 to make the basic color paint in the measuring cylinder 113 flow out . There are obvious deficiencies in this structure: firstly, the precision is not enough, and it only relies on the scale 111 to cooperate with manual measurement, and the error is very large. Secondly, it is inconvenient to operate.

Certainly, also have to adopt other modes, see Fig. 3, and it is provided with gear valve 12 in outlet pipeline, controls the flow of basic color paint by the rotation of gear 121,122. But the deficiency that this mechanism exists is exactly: because basic color paint is still a kind of material with powder, so use after a period of time, the gear in the gear valve 12 is subject to wear and tear easily, causes measurement error at last.

In addition, see U.S. Patent No. US 6886717 B2, which discloses a modularized automatic color blending device, which only modularizes the color blending device on the basis of the original product, and does not improve the accuracy of color blending . Equally, the U.S. patent specification that the patent No. is US 6726065 B2 also discloses a kind of automatic color blending equipment of modular design, and it adopts modular design equally, and is driven by a stepping motor.

Invention content:

The problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned products and provide a paint mixing equipment that can accurately measure the paint flow.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: the paint mixing equipment includes a container body for accommodating basic color paint, and an oil discharge device is arranged on the container body, and the oil discharge device includes a valve and a The driving mechanism linked to the valve, that is, the driving mechanism drives the valve to connect or block the individual container and the outlet; a light detector is installed at the outlet. The invention calculates the volume of paint flowing out of the outlet through the light detector, and feeds back the signal to the electronic processor, and the processor controls the driving mechanism to control the opening or closing of the valve.

The light detector includes a light source emitting end and a light source receiving end, and the outlet of the oil discharge device is located above the position between the light source emitting end and the receiving end.

The valve is a turning valve, and two channels are arranged in it, one of which is used to connect the cavity and the outlet of the individual container.

The driving mechanism is a link mechanism, one end of which is hinged to the valve, and the other end is provided with a relay controlled by a light detector, and the relay is used to control the operation of the driving mechanism.

The present invention adopts the current mature high-precision image detection technology as the detection device of the paint flow, so that the paint flow can be controlled within a small error range to ensure that the color of the prepared paint is correct.

Description of drawings:

Below in conjunction with accompanying drawing, the present invention will be further described:

Fig. 1 is the perspective view of existing paint mixing equipment;

Fig. 2 is a perspective view of an individual container of an existing paint mixing equipment;

Fig. 3 is the schematic diagram of another kind of oil outlet device of existing paint blending equipment;

Fig. 4 is the structural representation of individual container of the present invention;

Fig. 5 is the working schematic diagram of oil outlet device of the present invention;

Fig. 6 is a schematic diagram of another embodiment of the individual container of the present invention;

7 is a schematic diagram of a light detector according to an embodiment of the present invention;

8a-8c are working principle diagrams of a light detector according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a light detector according to Embodiment 2 of the present invention.

Detailed ways:

The main body of the present invention is the same as current similar products, and it also includes a base and a container body, and the container body is operated by a motor. See Fig. 4,5, this is the container individual 2 that the present invention is used for accommodating basic color paint, and this container individual 2 is provided with oil discharge device 3. The oil discharge device 3 includes a valve 31 and a driving mechanism 32 linked with the valve 31 , that is, the driving mechanism 32 drives the valve 31 to connect or block the container 2 and the outlet 33 . Its specific structure is: the valve 31 is a steering valve, its main body is cylindrical, and two passages 311, 312 are arranged in it. The channel 312 is used to connect the cavity of the individual container 2 with the outlet 33 , that is, when the valve 31 is rotated to a certain angle, the two ports of the channel 312 are just aligned with the outlet of the individual container 2 and the outlet 33 of the oil discharge device 3 . Channel 311 is used for paint return. The driving mechanism 32 is a link mechanism, one end of which is hinged to the valve 31 , and the other end is provided with a relay 34 controlled by the light detector 4 , and the relay 34 is used to control the operation of the driving mechanism 32 .

The rotary propeller 21 in the container body 2 includes a motor and a helical blade 210 , the bottom of the helical blade 210 and the motor are transmitted through a gear 211 , and the motor drives the helical blade 210 to rotate. When the spiral blade 210 rotates, it will generate a certain pushing pressure downward, so that the basic color paint in the container body 2 will flow out.

The working process of the entire oil discharge device is as follows: firstly, the screw push piece 210 in the container body 2 rotates under the drive of the motor, and simultaneously discharges the basic color paint in the container body 2 to the outlet. Valve 31 has two working states: open or closed. When the valve 31 is in an open state, the passage 312 in the valve 31 communicates the cavity of the container body 2 with the outlet 33 , and the basic color paint flows out from the outlet 33 under the push of the propeller 21 . When the valve 31 was in the closed state, the two ports of the passage 311 in the valve 31 were all communicated with the cavity of the cavity individual 2, so that the basic color paint was pushed by the propeller 21 and returned to the container individual 2 through the passage 311. Inside the cavity.

The relay 34 is used to control the driving mechanism 32, and the valve 31 is controlled to be in an open or closed state by turning on or off the relay 34 . And relay 34 is then controlled its switch by light detector 4.

The propeller 21 in the above-mentioned middle container individual 2 is used for the basic color paint in the container individual 2 to flow out from the outlet 33 downwards. Of course, other ways can also be used, such as adopting a piston-propelled structure. As long as the pressure in the individual container 2 is greater than the external atmospheric pressure, the paint can flow out. Therefore, an air pressure device can be used to maintain a certain air pressure in the container body 2 . See Fig. 6, this is another embodiment of the present invention, and it adopts air pressure device 6 to be used for the outflow of basic color paint, in order to ensure that the flow rate of basic color paint is even, this air pressure device 6 is provided with air pressure regulator 61, to control the pressure Size, to maintain a uniform outflow of basic color paint.

The light detector 4 adopted in the present invention is a high-precision light detector currently on the market. It has 1024 pixels per centimeter. Adopting this light detector 4 can greatly improve the accuracy of the present invention. As shown in FIG. 7 , the light detector 4 includes a light source emitting end 41 and a light source receiving end 42 , and the outlet 33 of the oil discharge device 3 is located above the position between the light source emitting end 41 and the receiving end 42 . When the light detector 4 is activated, an optical network is formed between the light source emitting end 41 and the light source receiving end 42, and when the paint flows out from the outlet 33, it must pass through the optical network. When the paint passes through the light net, the light net and the paint stream 51 (or paint drip 52) have a superimposed section, and the light detector 4 can accurately measure the size of this section. Below, take the paint bead 52 as an example to specifically illustrate its calculation principle: see Fig. 8 a, this paint bead 52 is high as L, and any cross-section S of it can be regarded as a circle, so if we put this paint bead 52 Horizontally divided into n sections, each section can be regarded as an approximate cylinder, the height of each section is L1, L2, L3...Ln, and the section of each section is: S1, S2, S3...Sn, so we The approximate volume of the paint droplet 52 can be obtained, V=L1*S1+L2*S2+L3*S3+...+Ln*Sn. See Fig. 8b, 8c, specifically in conjunction with the present invention, because the flow velocity of paint is fixed (we have taken measures before, make the flow velocity of basic color paint even), as long as we measure the area of cross-sectional size in different time periods, just The volume of paint passing through the light mesh can be calculated. And the width when the paint passes through the light net in a certain time can be measured by the light detector 4, and this width can be regarded as the diameter of its section, so just can calculate the area of this section. If it is set that the light detector 4 feeds back a cross-sectional boundary every interval t (t is small enough), then the light detector 4 measures four cross-sectional areas when the paint droplet 52 passes through the optical network: s1, s2, s3 , s4, the corresponding time is: t1, t2, t3, t4, because the flow rate of paint droplet 52 is certain (assumed to be v), then can calculate the volume V=s1*vt1+s2* of this droplet 52 vt2+s3*vt3+s4*vt4, as long as the interval time t is small enough, the size of the paint flow can be accurately calculated (the calculation of the volume of the paint flow 51 is similar). Through the calculation of the control chip, when the paint flow rate reaches a predetermined value, the controller starts the relay 34, and the relay 34 drives the driving mechanism 32 to run, so that the valve 31 is closed.

See Fig. 9, which is the second embodiment of the present invention. In this embodiment, two groups of light detectors 4 are arranged, and these two groups of light detectors 4 are vertically arranged below the outlet 33, with an interval between the two. The distance is d (eg d=10mm). In this embodiment, the frequency of the valve of the oil discharge device 3 is controlled by a pulse circuit, that is, a certain amount of paint will flow out of the outlet 33 at regular intervals. At the same time, it is necessary to control the outflowing paint to be in the shape of water droplets, instead of continuous water flow, that is, the paint is continuously discharged in the form of water droplets. During specific processing, the caliber of the outlet 33 and the time interval of the pulse can be specifically adjusted according to the viscosity of the paint, so that the paint drips in the form of water droplets.

The working principle of this embodiment is: the opening frequency of the outlet 33 is controlled by a pulse circuit, and when the paint drop 53 drops, it will first pass through the light detector 4 located above. The formation between the light source emitting end 411 of the light detector 4 above and the corresponding light source receiving end 421 now is detected by the signal light 401, when the paint drop 53 touches the light 401 in the process of falling, the light detector 4. Record the time T1 at this time. After the paint drop 53 passes through the light 401 completely, the light detector 4 records the time T2 at this time, so that we can get the time T=T2- T1, if the height of the paint drop 53 is L, then the velocity of the paint drop 53 is V=L/T. Similarly, we can also obtain the time when the paint drop 53 reaches the light detector 4 located below. The formation between the light emitting end 412 and the corresponding light receiving end 422 of the light detector 4 below is a signal detection light 402 , when the paint drop 53 touches the light 402 , record the time as T3. At this point we can calculate the speed of the paint drop 53 through another set of data. Because the distance d between two groups of light detectors 4 is constant, the time ΔT=T3-T1 between the paint drop 53 passing through the light 401, 402 can be obtained by calculation, so the speed V=d/ΔT of the paint drop 53= L/T (because the numerical value of d is very small, so do not need to consider the acceleration of paint drop 53, think that it does uniform velocity linear motion), according to this formula, we can obtain the height L of paint drop 53.

When the paint is dripping, its state when it runs in the air is an approximate spherical shape, if we know the height of the paint drop 53, we can calculate the approximate value of its volume (the error is very small).

In embodiment 2, since the paint is continuously falling in the bead state, the light detector 4 does not need to frequently calculate the cross-section of the paint drop, so it can use conventional light source emitting devices, such as laser emitters or light emitting diodes.

When the embodiment 2 is in use, the required paint volume is first set, and when the total volume of the dropped paint drops reaches the required paint volume, the controller cuts off the pulse current and closes the outlet 33.

To sum up, the present invention uses the current mature light source detection technology as the paint flow detection device, so that the paint flow can be controlled within a small error range to ensure that the color of the prepared paint is correct.

Claims (6)

1. Paint blending equipment, comprising: a container body (2) for accommodating basic color paint, and an oil discharge device (3) is arranged on the container body (2), characterized in that: the oil discharge device (3) includes A valve (31) and a driving mechanism (32) linked with the valve (31), that is, the driving mechanism (32) drives the valve (31), so that it connects or blocks the container individual (2) and the outlet (33); A light detector (4) is arranged at the exit (33). 2. The paint blending equipment according to claim 1, characterized in that: the light detector (4) includes a light source emitting end (41) and a light source receiving end (42), and the oil discharge device (3) The outlet (33) is located above the position between the emitting end (31) and the receiving end (42) of the light source. 3. The paint blending equipment according to claim 1, characterized in that: the valve (31) is a steering valve, in which two passages (311, 312) are arranged, wherein the passage (312) is used to communicate with the container The cavity and outlet (33) of the individual (2). 4. The paint blending equipment according to claim 1 or 3, characterized in that: said driving mechanism (32) is a linkage mechanism, one end of which is hinged to the valve (31), and the other end is provided with a passing light detector ( 4) A controlled relay (34), the relay (34) is used to control the operation of the drive mechanism (32). 5. The paint blending equipment according to claim 2, characterized in that there are two groups of light detectors (4), and there is a certain distance between the two groups of light detectors (4). 6. The paint mixing equipment according to claim 5, characterized in that: the opening frequency of the outlet (33) is controlled by a pulse circuit.

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