CN108940112B - Material taking mechanism of automobile repair paint color matching machine - Google Patents

Abstract

The invention provides a material taking mechanism of an automobile repair paint color matching machine, which has a simple structure and low cost, and comprises a lifting driving mechanism (50) arranged on a machine body (1), wherein a bracket (51) which moves up and down and is used for placing a cup supporting plate (6) and a paint mixing cup is arranged on the lifting driving mechanism (50); a conveyor belt conveying mechanism is horizontally arranged on the machine body (1); the conveyor belt transmission mechanism comprises an intermediate conveyor belt transmission mechanism (52) positioned right below the bracket (51), and side conveyor belt transmission mechanisms (53) which are respectively positioned at the left side and the right side of the intermediate conveyor belt transmission mechanism (52) and have gaps (54) with the intermediate conveyor belt transmission mechanism (52); the bracket (51) comprises two cross bars corresponding to the positions of the two gaps (54) respectively and a connecting rod connecting the two cross bars, and when the upper surfaces of the two cross bars are lowered to be flush with the upper surface of the conveyor belt of the middle conveyor belt conveying mechanism (52), the connecting rod is not contacted with the conveyor belt conveying mechanism.

Description

Car refinish paint tinting machine dispensing mechanism

Technical field

The invention belongs to the field of automatic dispensing of automobile refinishing paint, and specifically relates to a dispensing mechanism of an automobile refinishing paint tinting machine.

Background technique

Damaged car paint needs to be re-sprayed with car repair paint. Different car refinish paints require different color masterbatches. In order to meet the needs of different cars, there are many types of color masterbatches required for car paint color matching, about 50 to 90 types, far more than the types of latex paints. The automatic refinish paint tinting machine needs to be equipped with so many color master tubes, which requires a lot of space. For any kind of automatic color matching of automobile refinishing paint, the paint mixing cup needs to be accurately moved to all required color master cylinders to receive materials. This requires the automatic tinting machine to have a precise and complex transmission system, thereby increasing the cost. Therefore, there is a need for an automatic tinting machine for automobile refinishing paint that occupies little space and is low-cost.

When color matching before spraying car refinishing paint, one of the common methods is to compare the color card with the car color to find the color card of the same color, and then find the color masterbatch ratio of the color card number from the color matching software database in the computer according to the color card number. And the weight formula of each color masterbatch. According to the formula, the required types of color masterbatch are manually weighed, mixed, and stirred to prepare an automobile refinishing paint (hereinafter referred to as automobile paint) that is consistent with the color card. Labor efficiency is low, and the car refinish paint prepared according to the color card usually deviates from the color of the car to a certain extent, requiring further manual adjustment. It is time-consuming and labor-intensive, and requires high technical requirements for colorists and requires experienced colorists. Formulate consistent color automotive paint.

In the existing technology, there are also methods of finding the factory spray paint formula according to the car model or paint code, or using optical instruments (spectrophotometer) to measure the car surface paint to obtain the paint formula. In this way, the formula method can be suitable. The analysis of most car surface paints is relatively accurate and reduces the error between the car paint obtained based on the car model or paint code and the actual car paint color. But even so, previous statistics show that a considerable proportion of car surface paints still have color differences after one color matching, and further manual color matching correction is still needed. Therefore, the color matching of today's automotive refinishing paints has high requirements and high dependence on manual labor, and the efficiency of manual color matching is low. In particular, some paint mixing shops have a very large amount of color matching in a day, which can reach dozens or hundreds of colors. Even color matching workers can't complete it, and some stores even require two or four color matching workers. Even so, due to the high labor intensity, poor environment (color sticks everywhere, even on the body), and the long-term accumulation required to improve technology, people are still unwilling to do the job of color matching. On the other hand, it is also very difficult to recruit an excellent color matching worker, and the wages are low and there is no one to do it. Today's color matching technicians are indispensable, and for paint mixing shops with a small amount of color mixing or color mixing is only an auxiliary business (such as some 4S stores), the income from paint mixing cannot exceed the salary of a paint mixer. Therefore, if there is a device on the market that automatically and accurately blends the amount of color masterbatches of each color, it can achieve the purpose of improving efficiency, reducing blending technical requirements, and reducing labor costs.

In fact, in recent years, some companies have developed automatic tinting machines for automobile refinishing paint. But it failed to form a stable product and put it into the market. We all know that the existing mature and common automotive paint coloring methods in the world use weight ratio, and the masterbatch is poured manually from the paint bucket to weigh the color. That is, according to the weight requirements of the required color masterbatch, manually pour the masterbatch from the masterbatch barrel with a pulp cover on the top through the pulp outlet on the pulp cover. Weigh the required color masterbatch weight on an electronic scale. The color masterbatch in each formula is poured out from the masterbatch barrel and weighed to reach the required weight. Stir and mix the color masterbatch to complete the color matching of the desired color paint. The pulp cover has a stirring function and a manual control of the color masterbatch pouring function. At present, the color mixing formulas of manufacturers in the world that produce automotive refinish paint color masterbatches (such as Xinjin, DuPont, PPG, and BASF) are designed based on weight ratio.

There are two advantages to using weight paint over manual pouring for color mixing:

1. It is convenient to pour out the required amount of color masterbatch from the color masterbatch bucket, and it is also convenient to control the pouring amount: just observe when the required weight on the weighing scale is approaching, and gradually slow down the pouring speed of the color masterbatch by hand, so that It slowly approaches the required pouring weight until it finally reaches the required masterbatch weight and stops pouring out the masterbatch. Other color masterbatches are also poured out and weighed according to the same method to complete the required weight;

2. Several color masterbatches that need to be matched can be poured into a container and stirred directly: for example, if three color masterbatches are needed to match a color, the weight of each color masterbatch is 1.1 grams for color masterb A and 1.1 grams for color masterb B. 2.2 grams, C masterbatch requires 3.3 grams, you can put an empty bucket on the electronic scale and reset the weight. Pour masterbatch A into the empty bucket until the electronic scale shows 1.1 grams. Clear the electronic scale, and then pour in color masterbatch B until the electronic scale shows the weight is 2.2 grams; reset the electronic scale again, and pour in color paste C until the electronic scale shows 3.3 grams. Finally, stir the three color masterbatch evenly with a mixing ruler to complete the color matching.

Using weight toning was a natural choice from the very beginning of toning history. In order to avoid the fact that the ratio of color masterbatch cannot be accurately known and the required amount of color masterbatch cannot be accurately controlled by empirical color mixing, the weight ratio method, which is the most convenient to implement accurate color matching, is produced on the basis of empirical color mixing.

Theoretically, it is also true to use volume proportional color matching. However, the theoretically established volume ratio color matching method is difficult to implement in practice. There are several ways to obtain the desired volume of color masterbatch using the volume proportion color mixing method: Scenario 1: Manually pour the color masterbatch into a measuring cup, and control the poured color masterbatch according to the position of the volume scale scale of the measuring cup with human eyes. quantity. But there is a problem. Due to the characteristics of the paint, the accuracy of the volume of the color masterbatch determined by observing the position of the measuring cup scale with the human eye cannot reach the required accuracy of 0.1 gram weight. Especially when mixing a large amount of paint, the volume of the measuring cup is also It is larger, the cross-sectional area of the measuring cup is larger, and the human eye has a larger error in determining whether the color masterbatch reaches the specified scale position, which cannot meet the color mixing accuracy requirement of 0.1 grams. Moreover, even the inaccurate volumetric manual coloring method is much more difficult and cumbersome in actual operation than the weight-proportional coloring method, so that effective color matching cannot be achieved; Scenario 2: Use the specific gravity cup method: because the color masterbatch is Due to the discontinuity of wall-hanging residue and volume measurement, it is difficult to obtain the required volume in practical applications; Scenario 3: Manual injection tube volume measurement and injection method: due to the color masterbatch tape at the head of the injection tube for extracting the color masterbatch, It will cause precision errors. Cleaning the tape masterbatch is time-consuming and not environmentally friendly. If it is not cleaned, it will flow to the exit of the needle head and affect the error guarantee of less than 0.1 grams. Similarly, manual injection of viscous color masterbatch is very laborious, and people with weak strength cannot even push it. Although reducing the diameter of the injection tube can reduce the injection force and improve the accuracy of a single push, it is difficult to accurately inject a large amount of color masterbatch. It also needs to be pumped into the masterbatch container multiple times to extract the masterbatch. Each time the masterbatch is extracted, the hanging masterbatch at the injection nozzle must be removed, and the increase in the number of times will increase the cumulative error. At this time, an error of 0.1 grams is more difficult to achieve. Control, and this is much more complicated than the currently used weight ratio method for color matching. Of course, the color matching industry will choose the weight ratio method, which is simple and easy to implement, instead of the volume ratio method, which is time-consuming and difficult to ensure accuracy. color.

Technical personnel in this industry no longer considered using volume ratio to achieve color matching after the emergence of the weight ratio color matching method. Because from the past to the present, industry personnel have determined that it cannot replace weight ratio color matching and color matching after analyzing the above-mentioned influencing factors. This has subtly influenced the minds of industry personnel and has become a technical bias.

Contents of the invention

Automotive paint refinishing has a history of more than 100 years, and color matching is based on weight ratio. The main reason is that the volume measurement is not accurate and the equipment after launch cannot meet the demand. Top foreign manufacturers have been unable to solve this problem for a long time despite their attempts. It is generally believed that automotive paint can only be measured by weight ratio. The automotive paint repair in the known technology is also recorded in this way. For example, Automotive Paints, written by Wang Minxin and Wang Lijun, Chemical Industry Press 2005-7.6.3 The Color Mixing of Automotive Repair Push-pull Topcoats clearly states that the use of electronic balances should be used to weigh the paints. Colored paints should be added in small quantities in multiple batches, and avoid using If there is too much material, first add a small amount of paint each time, wait until the color paint is completely matched, and then expand the proportion as needed. It can be seen that this is common knowledge in this field, which has caused people to form a technical prejudice and cannot think of using volume ratio weights.

In order to solve the technical prejudice, the present invention provides a dispensing mechanism of an automobile refinish paint tinting machine with a simple structure and low cost.

The object of the present invention is achieved in the following manner: the car refinish paint tinting machine dispensing mechanism includes a lifting driving mechanism (50) provided on the body (1), and a lifting mechanism (50) for moving up and down is provided on the lifting driving mechanism (50). The bracket (51) for placing the cup plate (6) and the paint mixing cup; a conveyor belt transmission mechanism is set horizontally on the machine body (1); the conveyor belt transmission mechanism includes an intermediate conveyor belt transmission mechanism (52) located directly below the bracket (51) And the side conveyor belt transmission mechanisms (53) are respectively located on the left and right sides of the middle conveyor belt transmission mechanism (52) and there is a gap (54) between the middle conveyor belt transmission mechanism (52); the bracket (51) includes two, corresponding to two The crossbar at the gap (54) position and the connecting rod connecting the two crossbars. The connecting rod is located outside the conveyor belt transmission mechanism at the corresponding position of the bracket (51). The upper surfaces of the two crossbars descend to the middle conveyor belt transmission mechanism (52). ) when the upper surface of the conveyor belt is flush, the connecting rod does not contact the conveyor belt transmission mechanism; the lifting drive mechanism (50) and the conveyor belt transmission mechanism are electrically connected to the controller.

The bracket (51) is provided with a cup plate (6) on which the paint mixing cup is arranged; when the upper surfaces of the two horizontal bars drop below the upper surface of the conveyor belt with the intermediate conveyor belt transmission mechanism (52), the cup plate (6) ) The lower surface is higher than the highest surface of the two cross bars and is located on the surface formed by the conveyor belt transmission mechanism.

The bracket (51) is a quadrilateral structure composed of two parallel cross bars and two connecting rods, and the height of the lower bottom surface of the connecting rods corresponding to the area of the intermediate conveyor belt transmission mechanism (52) is higher than the height of the upper surface of the cross bars.

The side conveyor belt transmission mechanism (53) is provided with an in-position sensor (55) corresponding to the position of the lower masterbatch turntable (4) of the machine body (1) where the pulp is received; the middle conveyor belt transmission mechanism (52) is provided with an in-position sensor (55).

The lifting drive mechanism (50) is provided with an in-position sensor (55) corresponding to the position of the masterbatch turntable (4) on the upper layer of the machine body (1) where the pulp is received.

The beneficial effects of the present invention are: setting up two upper and lower layers of multiple turntable structures and setting up a corresponding unloading mechanism for conveying paint mixing cups, which not only solves the problem that the arrangement of multiple color masterbatches for automobile repair paints occupies a large space, but also ensures The discharging structure for color masterbatch is simple in structure, low in cost and requires less time in discharging materials. The entire device maximizes space utilization and reduces costs.

Description of drawings

Figure 1 is the overall schematic diagram of the coloring machine.

Figure 2 shows the layout of the masterbatch injection mechanism on the masterbatch turntable.

Figure 3 is a schematic diagram of the fixed volume injection mechanism of color masterbatch.

Figure 4 is an internal structure diagram of Figure 3.

Figure 5 is a schematic diagram of the parts for receiving materials and adjusting paint.

Figure 6 is a schematic view of the reverse side of Figure 5.

Figure 7 shows the material taking mechanism.

Figure 8 shows cup plate implementation 1.

Figure 9 shows cup plate embodiment 2

Among them, 1 is the machine body, 2 is the fixed volume injection mechanism of the masterbatch, 3 is the material receiving and mixing parts, 4 is the masterbatch turntable, 5 is the material taking mechanism, 6 is the cup plate, 7 is the drip box, and 20 is the color Mother barrel, 21 is the valve body, 22 is the volume metering pump, 23 is the slurry outlet, 24 is the valve body lever, 25 is the injection channel, 26 is the piston rod, 33 is the valve motor, and 34 is the second linear drive mechanism , 50 is the lifting drive mechanism, 51 is the bracket, 52 is the middle conveyor belt transmission mechanism, 53 is the side conveyor belt transmission mechanism, 54 is the gap, 55 is the position sensor, 201 is the barrel cover, 202 is the stirring shaft, 205 is the breathing valve, 207 is the spiral stirring blade, 340 is the tie rod head baffle, 341 is the screw, and 342 is the nut.

Detailed ways

For situations where the specific gravity of the color masterbatch is stable or the demand for the color masterbatch is relatively small, the volume method can be used to achieve accurate color masterbatch extraction. The method of using volume ratio to color match is as follows;

The volume color matching method of automotive refinishing paint includes the following steps:

(1) Find the car ID card with the color number printed on the car body to be repaired, find out the color code of the car or compare it with the color card code that is close to it, and use a reader or computer color matching system to find out the weight formula of the repair paint used ; Or use a spectrophotometer to detect the surface of the complete body coating to be repaired, and calculate the weight formula of the repair paint;

(2) Calculate the corresponding repair paint volume formula based on the repair paint weight formula and the measured masterbatch specific gravity;

(3) Calculate the type and volume of the required masterbatch according to the volume formula of the repair paint and the area to be repaired;

(4) Obtain the color masterbatch according to the required type and volume and mix it.

The specific gravity of the masterbatch is measured by using the high-precision volume pump of the present invention to pump out a predetermined volume of the masterbatch, such as 30 ml. Use an electronic scale with an accuracy of ±0.001g or ±0.01g to weigh it. The weight is equal to the volume to get the actual specific gravity of the masterbatch. You can test it once, you can test it several times and take the average. This method is suitable for masterbatch with relatively stable density. Currently, in the field of automotive refinish paint color matching, various color pastes are prepared according to weight proportions. This method requires additional weighing devices such as electronic scales. The vehicle refinishing paint that uses volume ratio to mix various color pastes to achieve predetermined effects does not require a weighing device and has a simple structure.

For color masterbatches with unstable specific gravity and large fluctuations, the volume used will cause the amount of added color masterbatch to be inaccurate, thus affecting paint mixing, especially when a large amount of color masterbatch is required. For accuracy, the following weight-volume mixing and color matching methods can be used;

The weight-volume mixing method for automotive refinish paint includes the following steps:

(1) Find the car ID card with the color number printed on the car body to be repaired, find out the color code of the car or compare it with the color card code that is close to it; use a reader or computer color matching system to find out the weight formula of the repair paint used ; Or use a spectrophotometer to detect the surface of the complete body coating to be repaired, and calculate the weight formula of the repair paint;

(2) Calculate the corresponding repair paint volume formula based on the repair paint weight formula and the measured masterbatch specific gravity;

(3) Calculate the type of color masterbatch required and the volume required for each color masterbatch according to the volume formula of the repair paint and the area to be repaired; calculate the type of color masterbatch required and the required volume of each color masterbatch according to the weight formula of the repair paint and the area to be repaired. Required weight of mother;

(4) Find the masterbatch barrel corresponding to one of the masterbatch A according to the required masterbatch type, take more than half V ₁ of the required volume V of the masterbatch A, and weigh M ₁ ; subtract it from the required weight M of the masterbatch The weight M ₂ obtained from M ₁ is converted to the volume V ₂ according to the specific gravity of the color masterbatch measured in step (2), and the color masterbatch A with a volume of V ₂ is taken to complete the discharging of the color masterbatch A;

(5) Find the color masterbatch buckets corresponding to the remaining color masterbatches according to the required color masterbatch types, and follow the method in step (4) to complete the collection of other color masterbatches; mix and stir the taken color masterbatch.

Among them, the standard for V ₁ that is more than half of the volume V required by color masterbatch A is: the maximum mass of V ₁ is calculated based on the specific gravity range of color masterbatch A so that it is less than the required weight M of color masterbatch A. Use a laboratory's high-precision volume pump or the volume pump of the present invention to pump out a predetermined volume of masterbatch, weigh it with an electronic scale with an accuracy of ±0.001g or 0.01g, and divide the weight by the volume to obtain the actual masterbatch specific gravity. This method first calculates the required volume, and injects different volumes of color masterbatch in two batches. The first time is a larger volume. After weighing, the remaining required weight is calculated, and then converted into volume and injected. In this way, the volume injected for the second time will be smaller. Even if the specific gravity of the masterbatch is adjusted to be larger, the absolute error will be smaller because the volume of the second time is small. This error is within an acceptable error range relative to the entire required amount of masterbatch.

As shown in Figure 1-7, the automatic tinting machine for automobile refinishing paint includes a body 1 and a controller, and also includes at least two masterbatch turntables 4 driven by a rotary drive mechanism to rotate and set on the body 1, and one masterbatch turntable. 4 is located on the upper layer of the body 1, and at least one color masterbatch turntable 4 is located on the lower layer of the body 1; a color masterbatch discharging mechanism is provided on the color masterbatch turntable 4, and the color masterbatch discharging mechanism includes a pulp outlet 23 controlled by a valve; each masterbatch discharging device The pulp outlet nozzles 23 of the mechanism are arranged in a circle on the masterbatch turntable 4, and each masterbatch turntable 4 is provided with a pulp receiving place; the masterbatch turntable 4 rotates so that each pulp outlet nozzle 23 passes above the pulp receiving place in turn; the machine body 1 is provided with a retrieval mechanism 5 that switches the position of the paint mixing cup between the slurry receiving locations of the respective masterbatch turntables 4.

The pickup mechanism 5 includes a lifting drive mechanism 50 provided on the machine body 1. The lift drive mechanism 50 is provided with a bracket 51 that moves up and down for placing the cup plate 6 and the paint mixing cup; the lower position of the machine body 1 is horizontal. A conveyor belt transmission mechanism is provided; the conveyor belt transmission mechanism includes an intermediate conveyor belt transmission mechanism 52 located directly below the bracket 51 and side conveyor belt transmission mechanisms 53 respectively located on the left and right sides of the intermediate conveyor belt transmission mechanism 52 and with a gap 54 between them. The middle conveyor belt transmission mechanism 52 and the side conveyor belt transmission mechanism 53 are respectively driven by a reduction motor to rotate the pulley, thereby driving the conveyor belt to rotate. The bracket 51 includes two horizontal bars corresponding to two gap positions respectively and a connecting rod connecting the two horizontal bars. The connecting rod is located outside the conveyor belt transmission mechanism at the corresponding position of the bracket 51. The upper surfaces of the two horizontal bars drop to the middle When the upper surface of the conveyor belt of the conveyor belt transmission mechanism 52 is flush, the connecting rod does not contact the conveyor belt transmission mechanism; the lifting drive mechanism 50 and the conveyor belt transmission mechanism are electrically connected to the controller.

The bracket 51 is provided with a cup plate 6 on which a paint mixing cup is arranged; when the upper surfaces of the two horizontal bars drop below the upper surface of the conveyor belt with the intermediate conveyor belt transmission mechanism 52, the lower surface of the cup plate 6 is higher than the two horizontal bars. The highest surface of the rod and is located on the surface formed by the conveyor belt conveyor mechanism.

The connecting rod is located outside the conveyor belt transmission mechanism at the corresponding position of the bracket 51, so that the connecting rod is located on both sides of the intermediate conveyor belt transmission mechanism 52 or at a position other than the two sides. When the crossbar descends into the gap 54, if the connecting rod is located outside the conveyor belt transmission mechanism, it must not contact. At this time, there is no structure on the conveyor belt transmission mechanism that hinders the movement of the bracket; if the connecting rod is located on both sides of the conveyor belt transmission mechanism , the two sides here refer to the two sides parallel to the transmission direction; that is, the bracket 51 is a quadrilateral structure composed of two horizontal bars and two connecting rods, and the lower bottom height of the connecting rod corresponding to the area of the middle conveyor belt transmission mechanism 52 is higher than The height of the upper surface of the crossbar. At this time, the height of the bottom surface of the connecting rod is higher than the height of the upper surface of the cross bar, and the connecting rod does not affect the transmission. The lifting drive mechanism 50 can be a screw and nut mechanism; it includes a screw provided on the body 1 and a nut connecting bracket 51 . The cup support plate 6 is provided with a height-adjustable slot dedicated to placing the paint mixing cup.

The specific method of picking up materials is to move from the pulp picking place in the upper layer to the pulp picking place in the lower layer: the lifting drive mechanism 50 drives the bracket 51 down to the cross bar and is located in the gap. The upper surface of the cross bar is lower than the upper surface of the conveyor belt in the conveyor belt transmission mechanism 52. At this time, the cup plate 6 located on the two horizontal bars falls to the upper surface of the intermediate conveyor belt transmission mechanism 52. The middle conveyor belt transmission mechanism 52 and the side side conveyor belt transmission mechanism 53 corresponding to the lower pulp extraction place rotate to transport the cup plate 6 and the paint mixing cup to the corresponding pulp extraction location. When returning from the lower level to the upper level, the steps are reversed.

An in-position sensor 55 is provided on the side conveyor belt transmission mechanism 53 corresponding to the location where the color masterbatch turntable on the lower layer of the machine body receives slurry. The intermediate conveyor belt transmission mechanism 52 is provided with an in-position sensor 55; the lifting drive mechanism 50 is provided with an in-position sensor 55 corresponding to the position where the pulp is connected to the masterbatch turntable 4 on the upper layer of the machine body 1. The in-position sensor sends a signal after sensing it, and the control system controls the middle conveyor belt transmission mechanism 52 or the side conveyor belt transmission mechanism 53 to start or stop. The feeding mechanism 5 can be used for volume ratio color matching or weight-volume mixing color matching. If volume ratio color matching is used, then the masterbatch injection mechanism on the masterbatch turntable 4 can use a fixed volume injection mechanism. When using weight-volume mixing for color mixing, the masterbatch injection mechanism on the masterbatch turntable 4 needs to use a fixed volume injection mechanism, and the paint mixing cup needs to be placed on an electronic scale, and the electronic scale moves with the cup plate 6 .

When the color masterbatch injection mechanism is a color masterbatch fixed-volume injection mechanism 2, it includes a masterbatch barrel 20. The color masterbatch barrel 20 is connected through a valve body 21 to a volume metering pump 22 driven by a driven mechanism to inject a fixed volume; the valve body 21 is provided with Pulp outlet 23. The valve body 21 has on-off and commutation functions. The volumetric metering pump 22 may be a volumetric pump driven by a stepper motor, a servo motor, or a direct motor, such as a piston pump or a plunger pump.

The valve body 21 of the color masterbatch constant volume injection mechanism 2 is provided with a valve body lever 24, and the valve body 21 is provided with an injection channel 25. The body 1 is provided with a material-receiving and paint-adjusting component 3 located above the slurry outlet. The material-receiving and paint-adjusting component 3 is provided with a valve that rotates the valve body lever 24 to connect or close the injection channel 25 and the slurry outlet nozzle 23. Motor 33. The valve motor 33 is provided with a lever, and the rotation of the lever causes the valve body lever 24 to rotate.

The volumetric metering pump 22 is a piston pump; a second linear drive mechanism 34 is provided above the valve motor 33 of the material-receiving and paint-adjusting component 3, and a pull rod head baffle 340 that moves up and down is provided on the second linear drive mechanism 34 to lift or press down the piston pump. The piston rod 26. The second linear drive mechanism 34 can be a screw nut mechanism. The material receiving and paint adjusting component 3 is provided with a screw 341 driven by a second servo motor to rotate. A nut 342 is provided on the screw and connected to the tie rod head baffle 340 . The tie rod head baffle includes a groove structure, and the piston head of the piston rod leaves or enters the groove of the groove mechanism as the master barrel rotates. The nut 342 moves up and down so that the piston rod moves up and down to suck and punch out the masterbatch from the masterbatch barrel.

Below the valve motor 33 of the material-receiving and paint-adjusting component 3 is also provided a drip-catching box 7 that is moved by the driving mechanism. The drip-catching box 7 includes a drip-catching station located directly above the paint-adjusting cup and an avoidance device that avoids the position of the paint-adjusting cup. Station. The material-receiving and paint-adjusting component 3 is provided with a third linear motion mechanism. For example, a motor drives a gear, and the rotation of the gear drives the rack to move. The drip-catching box 7 is connected to the rack and moves together. Or a cylinder is provided on the mobile frame, and the cylinder piston rod drives the drip box 7 to move together. After the injection channel 25 is closed, that is, after the pulp outlet 23 no longer discharges pulp, there may be residual color paste. Set up the drip-catching box 7. After the injection channel 25 is closed, the drip-catching box 7 moves to just below the pulp outlet 23 to prevent residual color paste from dripping into the paint mixing cup, affecting accuracy.

The masterbatch barrel 20 is sealed with a lid 201 and a breathing valve 205 is provided on the lid; the masterbatch barrel 20 is provided with a stirring shaft 202 that is rotated by a driving mechanism and has one end extended into the masterbatch barrel, and a spiral stirring blade is provided on the stirring shaft 202 207. A corrosion-resistant sealing ring is provided between the masterbatch barrel 20 and the bucket cover 201. The sealing ring is made of corrosion-resistant material so as to adapt to the corrosive nature of the masterbatch in automobile paint. The spiral stirring blade 207 is a bubble-cutting blade. During the stirring process, the color masterbatch slurry can be beaten onto the barrel wall to pop out or break the bubbles, which facilitates volume measurement. Because the more bubbles there are, the more inaccurate the volume measurement will be. This is different from the stirring blade used in latex paint. The stirring driving method of the stirring shaft 202 refers to the latex paint stirring driving method with a turntable structure, which is an existing technology and will not be described in detail here.

The breathing valve (205) is a one-way valve with two opposite directions. The valve body 21 is a return valve, and the volume metering pump 22 is a combined large and small pump. The structure of the return valve and the large and small combination pump can be as shown in the valve body structure and pump structure in the patent CN201410792479.7 or CN201711400600.7 or CN201310045508.9. The return valve has a return channel. When the valve body 21 is in a closed state, that is, when the color slurry is not injected, the return channel is connected, that is, the valve body 21 is connected to the masterbatch barrel 20, and the automobile repair paint can flow back into the masterbatch barrel 20. Because automobile repair paint is relatively viscous, if there is no return channel, the injection channel 25 will easily dry up and become clogged, causing difficulty in painting.

The material receiving and paint mixing component 3 is provided with a code scanning module, and the color masterbatch fixed volume injection mechanism 2 is provided with a QR code. The code scanning module is a scanner, and the QR code records the color number and other information of the masterbatch barrel. When picking up materials for the first time, it is necessary to scan and confirm the fixed volume injection mechanism 2 of each color masterbatch. After replacing the masterbatch barrel 20, the replaced masterbatch barrel 20 also needs to be scanned again.

There are two masterbatch turntables on the lower layer of the machine body, and the three masterbatch turntables are arranged in a vertical pattern. This structure, combined with the material picking mechanism 5 of the present invention, can maximize space utilization. The lower masterbatch turntable 4 is arranged on the machine body support plate; the machine body support plate is slidably installed on the machine body 1; a handle is provided on the outer surface of the machine body 1 support plate. The lower masterbatch turntable can be pulled out for easy installation and disassembly.

Figure 8-9 shows two types of cup plates. Figure 8 shows a structure without an electronic scale on the pallet. In Figure 9, an electronic scale is provided on the cup support plate, and a groove for preventing the paint mixing cup is provided on the electronic scale. The structure of Figure 8 is suitable for the method of color matching using volume ratio. The structure of Figure 9 can be used for the weight-volume mixed color matching method.

Specific implementation: For the volume color matching method: first, the system detects the weight ratio of the car refinish paint, converts the required volume ratio of the car refinish paint based on the car refinish paint volume color matching method, and finds the corresponding color masterbatch fixed volume injection mechanism 2 s position. The dispensing mechanism 5 moves the cup plate 6 and the paint mixing cup to the pulp dispensing position corresponding to the color masterbatch turntable 4. The color masterbatch turntable 4 rotates so that the required color masterbatch fixed volume injection nozzle 23 of the color masterbatch dispensing mechanism 2 passes through the paint mixing position. Stop above the cup. The second linear drive mechanism 34 starts. The screw 341 rotates to drive the nut 342 to move upward. The rod head baffle 340 drives the piston rod 26 of the volumetric metering pump 22 to rise to extract the color paste. After the piston rod 26 drops by a preset displacement, the valve motor 33 When activated, the injection channel 25 of the valve body 21 is connected to the pulp outlet 23, the piston rod 26 continues to descend, and a predetermined amount of color paste flows out from the pulp outlet 23 to the paint mixing cup. The valve motor 33 is closed, and the drip box 7 moves to below the pulp outlet 23. The masterbatch turntable 4 rotates to the next pulp discharge nozzle 23 that requires masterbatch and reaches the pulp discharge position, and the drop box 7 is removed to take out the material. After the color masterbatch on this color masterbatch rotary disk 4 is taken, it is moved to the pulp dispensing place of the next color masterbatch rotary disk 4 through the discharging mechanism 5 to take out the material. After all are taken out, the paint mixing cup moves to a predetermined position, usually on the conveyor belt of the intermediate conveyor belt transmission mechanism, waiting to be taken out.

The method of mixing color by weight and volume: The difference from the above method is that when taking a predetermined amount of color masterbatch, you need to first take most of the volume of the color masterbatch, weigh it, calculate the remaining required weight, convert it into the remaining required volume, and punch it out.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

Claims (3)

1. The dispensing mechanism of the automobile refinish paint tinting machine is characterized by: including a lifting drive mechanism (50) provided on the body (1), and a lifting plate for placing cups that moves up and down is provided on the lifting drive mechanism (50). (6) and the bracket (51) of the paint mixing cup; a conveyor belt transmission mechanism is set horizontally on the machine body (1); the conveyor belt transmission mechanism includes an intermediate conveyor belt transmission mechanism (52) located directly below the bracket (51) and an intermediate conveyor belt respectively located There are side conveyor belt transmission mechanisms (53) on the left and right sides of the transmission mechanism (52) and there are gaps (54) between the middle conveyor belt transmission mechanism (52); the bracket (51) includes two corresponding to the two gap (54) positions. The horizontal bars and the connecting rod connecting the two horizontal bars are located outside the conveyor belt transmission mechanism at the corresponding position of the bracket (51). The upper surfaces of the two horizontal bars drop to the upper surface of the conveyor belt of the intermediate conveyor belt transmission mechanism (52). When flush, the connecting rod does not contact the conveyor belt transmission mechanism; the lifting drive mechanism (50) and the conveyor belt transmission mechanism are electrically connected to the controller; The bracket (51) is provided with a cup plate (6) on which a paint mixing cup is arranged; when the upper surfaces of the two horizontal bars drop below the upper surface of the conveyor belt of the intermediate conveyor belt transmission mechanism (52), the cup plate (6) The lower surface is higher than the highest surface of the two cross bars and is located on the surface formed by the conveyor belt transmission mechanism; The bracket (51) is a quadrilateral structure composed of two parallel cross bars and two connecting rods, and the height of the lower bottom surface of the connecting rods corresponding to the area of the intermediate conveyor belt transmission mechanism (52) is higher than the height of the upper surface of the cross bars. 2. The dispensing mechanism of the automobile refinish paint tinting machine according to claim 1, characterized in that: the side conveyor belt transmission mechanism (53) is set at a position corresponding to the base color masterbatch turntable (4) of the body (1). In-position sensor (55); an in-position sensor (55) is provided on the intermediate conveyor belt transmission mechanism (52). 3. The dispensing mechanism of the automobile refinish paint tinting machine according to claim 2, characterized in that: the lifting drive mechanism (50) is provided with an in-position sensor corresponding to the position of the slurry receiving point of the upper color masterbatch turntable (4) of the body (1). Device (55).