Preparation device of binding-free pearlescent pigment for powder coating

Abstract

The utility model provides a preparation device of binding-free pearlescent pigment for powder coating, which comprises a machine body, an upper end of the machine body is provided with a mounting port, and the machine body is provided with a cover plate; the screening mechanism comprises a first screen, a second screen and a pushing assembly, the first screen and the second screen are both in sliding connection with the cover plate in the direction perpendicular to the material flowing direction, the two screens are arranged in the material flowing direction in a spaced mode, and a feeding opening is formed in the cover plate; the pushing assembly is installed between the first screen and the second screen. The air blowing mechanism comprises an air blower and multiple air scattering plates, the air blower is fixedly installed on the machine body, the multiple air scattering plates are arranged on the inner side wall of the machine body, and air outlets of the air blower are connected with the air scattering plates in a one-to-one correspondence mode through multiple air guide pipes; the spraying mechanism is arranged at one end of the cover plate. According to the utility model, pearlescent pigment powder can be blown in the container in a dispersed manner, and then uniform resin spraying and adhesion are performed by matching with the movable spray gun, so that the problems of thick local resin coverage and incomplete pearlescent pigment adhesion are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of surface treatment equipment for pearlescent pigment raw materials, and in particular to a preparation device for non-binding pearlescent pigments for powder coatings. Background Technology

[0002] Pearlescent pigments are optical effect pigments; because they exhibit a certain metallic luster, they are also known as non-metallic pigments with metallic luster. Polyester resin is a high-molecular polymer. By spraying liquid polyester resin evenly onto the surface of pearlescent pigment powder, the pigment particles are encapsulated by the resin, thus creating composite materials with specific properties. After uniformly mixing it with polyester powder, the pearlescent powder is evenly arranged on the coating surface through electrostatic spraying.

[0003] There are two existing conventional methods. One involves mixing pearlescent pigments with polyester resin powder at high speed under a certain temperature, using the softened polyester resin to bond with the pearlescent pigments, thus coating the surface of the pearlescent pigments with polyester resin. The other method involves placing the polyester resin and pearlescent pigments in an extruder, where they are melted, kneaded, extruded, crushed, and sieved to obtain pearlescent pigments with a polyester resin coating. However, both methods are prone to causing excessively thick local coverage of the polyester resin and damage to the pearlescent coating layer itself, resulting in a decrease in the gloss and brightness of the pearlescent pigments. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a device for preparing unbound pearlescent pigments for powder coatings. The device can disperse and blow up pearlescent pigment powder in a container, and then, in conjunction with a moving spray gun, perform uniform resin spraying and adhesion, thus solving the problems of thick local resin coverage and incomplete adhesion of pearlescent pigments.

[0005] According to an embodiment of this utility model, an apparatus for preparing unbound pearlescent pigments for powder coatings includes: a machine body, the upper end of which has an installation port, and a cover plate slidably disposed at the installation port in a direction perpendicular to the material flow; a sieving mechanism, including a first screen, a second screen, and a pushing component, wherein the first screen and the second screen are slidably connected to the cover plate in a direction perpendicular to the material flow, the two screens are spaced apart in the material flow direction, and the cover plate has a feed inlet; the pushing component is installed between the first screen and the second screen and is used to drive the two screens to slide back and forth; an air blowing mechanism, including a blower and a diffuser plate, wherein the blower is fixedly installed on the machine body, and multiple diffuser plates are respectively disposed on the inner side wall of the machine body, and the air outlet of the blower is connected to the diffuser plates one by one through multiple air guide pipes; and a spraying mechanism disposed at the end of the cover plate away from the first screen and the second screen.

[0006] The technical principle of this utility model is as follows: Pearl pigment powder is fed into the machine body through the feed port and passes through the first screen and the second screen in sequence. The two screens slide back and forth under the action of the pushing component, filtering out the pigment powder that meets the requirements and shaking it to the vicinity of the blower mechanism. The blower is started, and the airflow is dispersed by the air diffuser plates around the machine body and the bottom through the air guide pipe, blowing around the machine body and blowing the pigment powder into the space inside the machine body. Then, liquid polyester resin is released through the spraying mechanism, which mixes with the scattered pearl pigment powder and adheres evenly.

[0007] Preferably, the aperture of the first screen and the second screen decreases sequentially along the material flow direction.

[0008] By adopting the above technical solution, the pearlescent pigment powder can be screened to prevent unqualified large-particle pigment powder from being mixed in and affecting the overall preparation effect.

[0009] Preferably, the pushing component includes a drive motor, an eccentric wheel, and a wedge block. The drive motor is fixedly mounted on the upper end of the cover plate, and the output axis of the drive motor passes downward through the cover plate and is fixedly connected to the eccentric wheel coaxially. The eccentric wheel abuts against one end of the first screen. The wedge block is slidably connected to the cover plate along the material flow direction, and the ends of the first and second screens away from the eccentric wheel are both slidably abutting against the inclined surface of the wedge block.

[0010] By adopting the above technical solution, when the drive motor drives the eccentric wheel to rotate and come into contact with the first screen, the first screen is driven to slide laterally, come into contact with the inclined surface of the wedge block and push the wedge block to move up and down along the inclined surface, so that the wedge block can push the second screen to slide in the opposite direction, cooperate with the first screen, and slide back and forth to achieve a better screening effect.

[0011] Preferably, the first screen, the second screen, and the wedge block are all slidably connected to the cover plate via a reset elastic element.

[0012] By adopting the above technical solution, after the wedge block loses the pushing effect of the first screen, it can automatically reset under the action of the reset elastic element so as to cooperate with the reciprocating sliding of the two screens. Similarly, after the first screen and the second screen lose their abutting effect, they can also automatically reset.

[0013] Preferably, the spraying mechanism includes a storage tank, a connector, high-pressure nozzles, and a rotating assembly. The storage tank is fixedly installed on the cover plate, the connector is located inside the machine body and connected to the outlet end of the storage tank, and multiple high-pressure nozzles are evenly spaced and connected at the bottom of the connector. The rotating assembly is located between the connector and the drive motor.

[0014] By adopting the above technical solution, polyester resin is stored in a storage tank and sprayed outward through a high-pressure nozzle and connector. At the same time, the rotating component drives the connector to rotate, which in turn drives the high-pressure nozzle to rotate, so as to uniformly spray the pigment powder scattered in the machine body.

[0015] Preferably, the rotating assembly includes a first transmission wheel, a second transmission wheel, a drive gear, and a gear ring. The first transmission wheel is coaxially and fixedly connected to the output shaft of the drive motor. The second transmission wheel is rotatably connected to the cover plate via a rotating shaft, and a transmission belt is sleeved between the first and second transmission wheels. The lower end of the rotating shaft passes through the interior of the machine body and is coaxially and fixedly connected to the drive gear. The gear ring is fixedly sleeved on the outer circumference of the connector, and the drive gear meshes with the gear ring.

[0016] By adopting the above technical solution, the drive motor starts and sequentially drives the first transmission wheel, the second transmission wheel, the rotating shaft and the drive gear to rotate. The drive gear then meshes and drives the gear ring to rotate, causing the rotating head and the high-pressure nozzle to rotate and spray polyester resin evenly outward.

[0017] Preferably, the machine body is also provided with an inclined filter plate inside, and the machine body has a discharge port on the side wall that is connected to the inclined lower end of the filter plate; a transfer cavity is fixedly installed outside the machine body, and a spiral conveying pipe is rotatably provided inside the transfer cavity, and the spiral conveying pipe is connected to the discharge port of the machine body.

[0018] By adopting the above technical solution, the inclined filter plate plays the role of guiding the material, which can export the pearlescent pigment powder with resin adhering to it into the transfer cavity and connect it with the spiral conveying pipe, and then be transferred by the rotating spiral conveying pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting up a sieving mechanism, the larger particles of pearlescent pigment powder are filtered out, which can improve the uniformity between pigment powders and further improve the quality of the finished product.

[0021] 2. By setting up an air blowing mechanism and a spraying mechanism, the sieved powder pigment is blown up by multiple airflows inside the machine and dispersed throughout the machine, which can be evenly distributed. In conjunction with the spraying mechanism, it can achieve uniform adhesion between pigment powder and resin, avoiding the problems of thick local resin coverage and incomplete powder adhesion that may be caused by traditional flat spraying. Attached Figure Description

[0022] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0023] Figure 1 This is one of the internal structural diagrams of this utility model;

[0024] Figure 2 This is the second schematic diagram of the internal structure of this utility model;

[0025] Figure 3 This is an enlarged schematic diagram of a partial structure of the present invention.

[0026] In the above figures: 1. Machine body; 2. Cover plate; 3. Screening mechanism; 301. First screen; 302. Second screen; 303. Drive motor; 304. Eccentric wheel; 305. Wedge block; 4. Air blowing mechanism; 401. Air blower; 402. Air diffuser; 5. Spraying mechanism; 501. Storage tank; 502. Connector; 503. High-pressure nozzle; 504. First transmission wheel; 505. Second transmission wheel; 506. Drive gear; 507. Gear ring; 508. Rotating shaft; 6. Filter plate; 7. Transfer cavity; 8. Spiral conveying pipe. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable for those skilled in the art that some well-known mechanisms and their descriptions may be omitted in the figures.

[0028] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the figures are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. In the description of this application, terms such as "first", "second", etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] like Figure 1-3As shown in the figure, this utility model embodiment proposes a preparation device for non-binding pearlescent pigments for powder coatings, including: a machine body 1, with an installation port at its upper end, and a cover plate 2 slidably disposed at the installation port along the direction perpendicular to the material flow; a sieving mechanism 3, including a first screen 301, a second screen 302, and a pushing component, wherein the first screen 301 and the second screen 302 are both slidably connected to the cover plate 2 along the direction perpendicular to the material flow, and the two screens are spaced apart along the material flow direction, and a corresponding feed inlet is provided on the cover plate 2; the pushing component... The moving component is installed between the first screen 301 and the second screen 302 to drive the two screens to slide back and forth; the blowing mechanism 4 includes a blower 401 and a diffuser plate 402. The blower 401 is fixedly installed on the body 1. There are multiple diffusers 402, which are respectively set on the bottom wall and the four side walls inside the body 1. The air outlet of the blower 401 is connected to the diffuser plate 402 one by one through multiple air guide pipes; the spraying mechanism 5 is set on the cover plate 2 at the end away from the first screen 301 and the second screen 302.

[0030] It should be noted that in order to ensure that the machine body 1 and the cover plate 2 can form a sealed inner cavity during operation, the cover plate 2 is an inverted U-shaped structure. The first screen 301, the second screen 302 and the wedge block 303 are all slidably connected to one outer edge of the cover plate 2. Correspondingly, the machine body 1 is a U-shaped structure, and baffles are slidably provided at both ends of the opening.

[0031] Before the polyester resin spraying step, when the pearl pigment powder needs to be sieved, first slide the cover plate 2 so that the first screen 301 and the second screen 302 move to the center of the machine body 1. At this time, the outer edge of one side of the cover plate 2 moves to seal one end opening of the machine body 1. Then push the baffle on the other side to seal the entire interior of the machine body 1 so that the pigment powder can be put in for sieving.

[0032] When spraying polyester resin, first remove the baffle, then push the cover plate 2 to move the spraying mechanism 5 to the center of the machine body 1. At this time, the outer edge of the other side of the cover plate 2 seals one end of the machine body 1. Pushing the baffle on the other side can seal the inside of the machine body 1 again, and the polyester resin spraying operation can be carried out.

[0033] Furthermore, the apertures of the first screen 301 and the second screen 302 decrease sequentially along the material flow direction.

[0034] It should be noted that the aperture sizes of the first screen 301 and the second screen 302 are different, depending on the preparation requirements in the actual production process. The aperture size of the filter plate 6 is sufficient for ventilation and will not allow the pearlescent pigment powder adhering to the resin to leak out.

[0035] Furthermore, the pushing component includes a drive motor 303, an eccentric wheel 304, and a wedge block 305. The drive motor 303 is fixedly installed on the upper end of the cover plate 2, and the output axis of the drive motor 303 passes downward through the cover plate 2 and is fixedly connected to the eccentric wheel 304 coaxially. The eccentric wheel 304 abuts against one end of the first screen 301. The wedge block 305 is slidably connected to the cover plate 2 along the material flow direction, and the ends of the first screen 301 and the second screen 302 away from the eccentric wheel 304 are both slidably abutting against the inclined surface of the wedge block 305.

[0036] Furthermore, the first screen 301, the second screen 302, and the wedge block 305 are all slidably connected to the cover plate 2 through a reset elastic element.

[0037] It should be noted that the connection structure between the wedge block 305 and the cover plate 2 can be defined as follows: a vertical groove is opened on the inner wall of the outer edge of one side of the cover plate 2 through a groove and a vertical rod. The vertical rod is fixedly installed in the groove, the wedge block 305 is slidably connected to the vertical rod, and the reset elastic element is installed between the vertical rod and the wedge block 305.

[0038] When the eccentric wheel 304 is driven by the drive motor 303 and switches from the short shaft end to the long shaft end to abut against the side of the first screen 301, the first screen 301 pushes the wedge block 305 to move laterally under the abutment action. The inclined surface of the wedge block 305 gradually approaches the second screen 302 from top to bottom. Therefore, the wedge block 305 is pushed to move downward. During the downward movement, the second screen 302 is also pushed to move laterally, but in the opposite direction to the movement of the first screen 301. This process is repeated, and the eccentric wheel 304 continuously alternates between the long shaft end and the short shaft end abutting against the first screen 301, which can drive the two screens to move in opposite directions synchronously to speed up the screening of pigment powder and improve the screening effect. Similarly, the first screen 301 and the second screen 302 can also be slidably connected to the cover plate 2 through the structure of the chute and the vertical rod.

[0039] Furthermore, the spraying mechanism 5 includes a storage tank 501, a connector 502, a high-pressure nozzle 503, and a rotating assembly. The storage tank 501 is fixedly installed on the cover plate 2. The connector 502 is located inside the machine body 1 and is connected to the outlet end of the storage tank 501. Multiple high-pressure nozzles 503 are evenly spaced and connected at the bottom of the connector 502. The rotating assembly is located between the connector 502 and the drive motor 303.

[0040] It should be noted that the connector 502 is connected to the storage tank 501 and can rotate relative to the cover plate 2, while the high-pressure nozzle 503 can draw liquid polyester resin from the storage tank 501 and spray it outward.

[0041] Furthermore, the rotating assembly includes a first transmission wheel 504, a second transmission wheel 505, a drive gear 506, and a gear ring 507. The first transmission wheel 504 is coaxially and fixedly connected to the output shaft of the drive motor 303. The second transmission wheel 505 is rotatably connected to the cover plate 2 via a rotating shaft 508, and a transmission belt is sleeved between the first transmission wheel 504 and the second transmission wheel 505. The lower end of the rotating shaft 508 passes through the interior of the machine body 1 and is coaxially and fixedly connected to the drive gear 506. The gear ring 507 is fixedly sleeved on the outer circumference of the connector 502, and the drive gear 506 and the gear ring 507 are engaged in transmission.

[0042] Furthermore, a filter plate 6 is inclinedly arranged inside the machine body 1, and a discharge port is opened on the side wall of the machine body 1 that is connected to the inclined lower end of the filter plate 6; a transfer cavity 7 is fixedly installed outside the machine body 1, and a spiral conveying pipe 8 is rotatably arranged inside the transfer cavity 7, which is connected to the discharge port of the machine body 1.

[0043] It should be noted that the diffuser plate 402 itself has an inner cavity, but multiple air outlet holes are opened on the side away from the inner wall of the machine body 1. Furthermore, the multiple diffuser plates 402 do not fully cover the lower half of the inner part of the machine body 1. In conjunction with the installation angle and structure of the filter plate 6, gaps can be left between adjacent diffuser plates 402, so that the filter plate 6 can be inclinedly connected to the inside of the machine body 1, and the discharge port of the machine body 1 is left open, which facilitates the discharge of the pearlescent pigment powder with resin adhering to the machine body 1. In addition, in actual use, a separate power source, such as a stepper motor, can be set for the spiral conveyor pipe 8 to drive the spiral conveyor pipe 8 to rotate stably.

[0044] The implementation principle of this application embodiment is as follows: First, slide the cover plate 2 so that the first screen 301 and the second screen 302 are directly above the filter plate 6. Then, push the baffle on the corresponding side to move up and seal the inside of the machine body 1. Start the drive motor 303. The output shaft of the drive motor 303 drives the eccentric wheel 304 to rotate. When the eccentric wheel 304 rotates, its long shaft end and short shaft end alternately abut against the first screen 301. It will first drive the first screen 301 to slide left and right, and then slide against the inclined surface of the wedge block 305, driving the wedge block 305 to move downward to further abut against the second screen 302 and simultaneously slide in the opposite direction to filter and screen the pearlescent pigment powder. Filter out powder with a suitable particle size to enter the subsequent resin spraying step.

[0045] After the pearlescent pigment powder is sieved, slide the cover plate 2 again to move the storage tank 501 directly above the filter plate 6. Similarly, push the corresponding side baffle up to seal the inside of the machine body 1. At this time, the pearlescent pigment powder accumulates on the filter plate 6, which can serve as a temporary storage. Then, start the blower 401 and disperse the airflow to the sides and bottom of the machine body 1 through the air guide pipe and the air diffuser 402 to blow up the pearlescent pigment powder. Start the high-pressure nozzle 503 and the drive motor 303. The output shaft of the drive motor 303 drives the first transmission wheel 504 to rotate, which in turn drives the second transmission wheel 505, the rotating shaft 508, and the drive gear 506 to rotate under the action of the transmission belt. The drive gear 506 meshes and drives the gear ring 507 to rotate, which pushes the connector 502 and the high-pressure nozzle 503 to rotate, spraying liquid polyester resin into the machine body 1 to mix evenly with the pearlescent pigment powder scattered in the machine body 1, avoiding the problem of excessive local resin thickness caused by flat spraying.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. An apparatus for producing binder-free pearlescent pigments for powder coatings, characterized in that include: The machine body (1) has an installation port at its upper end, and a cover plate (2) is slidably provided at the installation port in a direction perpendicular to the material flow. The screening mechanism (3) includes a first screen (301), a second screen (302), and a pushing component. The first screen (301) and the second screen (302) are slidably connected to the cover plate (2) in a direction perpendicular to the material flow. The two screens are spaced apart in the direction of material flow. The cover plate (2) has a feed inlet. The pushing component is installed between the first screen (301) and the second screen (302) to drive the two screens to slide back and forth. The blowing mechanism (4) includes a blower (401) and a diffuser plate (402). The blower (401) is fixedly installed on the body (1). There are multiple diffusers (402) and they are respectively set on the inner side wall of the body (1). The air outlet of the blower (401) is connected to the diffuser plate (402) one by one through multiple air guide pipes. The spraying mechanism (5) is located at one end of the cover plate (2) away from the first screen (301) and the second screen (302).

2. A device for the preparation of binder-free nacreous pigments for powder coatings according to claim 1, characterized in that: The apertures of the first screen (301) and the second screen (302) decrease sequentially along the material flow direction.

3. A device for the preparation of binder-free nacreous pigments for powder coatings according to claim 2, characterized in that: The pushing component includes a drive motor (303), an eccentric wheel (304), and a wedge block (305). The drive motor (303) is fixedly installed on the upper end of the cover plate (2), and the output axis of the drive motor (303) passes through the cover plate (2) downward and is fixedly connected to the eccentric wheel (304) coaxially. The eccentric wheel (304) abuts against one end of the first screen (301). The wedge block (305) is slidably connected to the cover plate (2) along the material flow direction, and the ends of the first screen (301) and the second screen (302) away from the eccentric wheel (304) are slidably abutting against the inclined surface of the wedge block (305).

4. A device for producing binder-free nacreous pigments for powder coatings according to claim 3, characterized in that: The first screen (301), the second screen (302), and the wedge block (305) are all slidably connected to the cover plate (2) through a reset elastic element.

5. A device for preparing binder-free nacreous pigments for powder coatings according to claim 1, characterized in that: The spraying mechanism (5) includes a storage tank (501), a connector (502), a high-pressure nozzle (503), and a rotating assembly. The storage tank (501) is fixedly installed on the cover plate (2). The connector (502) is located inside the machine body (1) and connected to the outlet end of the storage tank (501). There are multiple high-pressure nozzles (503) that are evenly spaced and connected at the bottom of the connector (502). The rotating assembly is located between the connector (502) and the drive motor (303).

6. A device for the preparation of binder-free nacreous pigments for powder coatings according to claim 5, characterized in that: The rotating assembly includes a first transmission wheel (504), a second transmission wheel (505), a drive gear (506), and a gear ring (507). The first transmission wheel (504) is coaxially fixedly connected to the output shaft of the drive motor (303). The second transmission wheel (505) is rotatably connected to the cover plate (2) through a rotating shaft (508). A transmission belt is sleeved between the first transmission wheel (504) and the second transmission wheel (505). The lower end of the rotating shaft (508) is inserted into the machine body (1) and coaxially fixedly connected to the drive gear (506). The gear ring (507) is fixedly sleeved on the outer circumference of the connector (502), and the drive gear (506) and the gear ring (507) are engaged in transmission.

7. A device for producing binder-free nacreous pigments for powder coatings according to claim 1, characterized in that: The machine body (1) is also provided with a filter plate (6) at an inclination, and the machine body (1) has a discharge port on the side wall that is connected to the inclination lower end of the filter plate (6); a transfer cavity (7) is fixedly installed outside the machine body (1), and a spiral conveying pipe (8) is rotatably provided inside the transfer cavity (7), and the spiral conveying pipe (8) is connected to the discharge port of the machine body (1).

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