Air floatation coating machine

Abstract

The invention belongs to the technical field of coating equipment, and discloses an air flotation coating machine. The air flotation coating machine comprises a base, a conveying device, a coating device and an adjusting device, a bearing piece is arranged on the base, and the bearing piece can carry out multi-point bearing on a substrate and can adjust the bearing force, acting on the substrate, of each bearing point; the conveying device is arranged on the base, and the conveying device can convey the substrate in the preset direction and enable the substrate to be located above the bearing piece; the coating device is located above the bearing piece, and the coating device can coat the substrate conveyed to the position below the coating device by the conveying device; the adjusting device is configured to detect the flatness and the levelness of the substrate and control the bearing piece to adjust the bearing force, acting on the substrate, of each bearing point. According to the air flotation coating machine, the to-be-coated substrate can be corrected, so that the flatness and levelness of the to-be-coated surface of the substrate are improved, the uniformity of slurry coating is guaranteed, and finally the coating quality of the substrate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coating equipment, in particular to an air flotation coating machine. Background Art

[0002] Coating machines are mainly used for the surface coating process of plates, films, paper, etc., to coat the substrate with a layer of glue, paint or ink with specific functions. For example, the coating machine used for photovoltaic panels is used to coat the surface of the substrate with slurry.

[0003] The current coating machine mainly includes a base, a conveying device arranged on the base and a coating device arranged above the conveying device. When the coating machine is operating, the substrate is conveyed to the bottom of the coating device by the conveying device and coated by the coating device.

[0004] When the substrate is being coated, the substrate may be slightly bent or tilted due to reasons such as excessive base installation error, base deformation or conveying device installation error, causing the surface flatness and levelness of the substrate to exceed the normal range, that is, the flatness of the coating area is abnormal, resulting in uneven slurry coating on the substrate surface, thereby affecting the coating quality of the substrate. Summary of the invention

[0005] The object of the present invention is to provide an air flotation coater to detect and adjust the flatness and levelness of a substrate, thereby improving the uniformity of the surface coating of the substrate and further improving the coating quality of the substrate.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An air flotation coating machine, the air flotation coating machine comprising a base, a conveying device and a coating device, the base being provided with a supporting member, the supporting member being capable of supporting a substrate at multiple points and being capable of adjusting the supporting force of each supporting point acting on the substrate;

[0008] The conveying device is disposed on the base, and the conveying device can convey the substrate along a preset direction and enable the substrate to be located above the supporting member;

[0009] The coating device is located above the supporting member, and the coating device can coat the substrate transported by the transport device to the bottom of the coating device;

[0010] The air flotation coating machine further comprises an adjusting device, which is configured to detect the flatness and horizontality of the substrate and control the supporting member to adjust the supporting force of each supporting point acting on the substrate.

[0011] Preferably, the coating device comprises:

[0012] coating rack; and

[0013] A coating knife head is located above the supporting member and is connected to the coating frame.

[0014] Preferably, a crossbeam is slidably connected to the coating frame in a vertical direction, and the coating blade head is connected to the bottom of the crossbeam.

[0015] Preferably, it is characterized in that

[0016] The regulating device comprises:

[0017] A sensor, wherein the sensor is disposed on the coating blade head, and a plurality of the sensors are disposed along the length direction of the coating blade head; and

[0018] A controller is electrically connected to the sensor and the supporting member.

[0019] Preferably, the adjusting device further comprises:

[0020] A calibration platform, a reference plane is arranged on the top of the calibration platform, and the calibration platform can be moved to the bottom of the sensor to calibrate the distance between each sensor and the reference plane;

[0021] The crossbeam and the coating blade are connected via an adjusting member, a plurality of adjusting members are provided along the length direction of the coating blade, the adjusting member can adjust the distance between the crossbeam and the coating blade, and the adjusting member is electrically connected to the controller.

[0022] Preferably, the sensors and the adjusting members are arranged in one-to-one correspondence.

[0023] Preferably, the calibration platform is made of marble, granite, vacuum stone or stainless steel.

[0024] Preferably, the adjusting device further comprises:

[0025] A correction bracket is slidably arranged above the base, the correction bracket slides along a conveying direction parallel to the substrate, and the correction platform is connected to the correction bracket.

[0026] Preferably, a brush wheel is rotatably provided on the correction bracket, the axis of the brush wheel is parallel to the length direction of the coating blade head, and the brush wheel can clean the coating blade head.

[0027] Preferably, the supporting member is an air floating platform.

[0028] Beneficial effects of the present invention:

[0029] The air flotation coating machine of the present invention supports the substrate to be coated at multiple points through the supporting parts on the base, and transports the substrate to the bottom of the coating device through the conveying device to wait for coating. Before coating the substrate, the flatness and horizontality of the substrate are first detected by the adjusting device, and the supporting force of each supporting point on the supporting part on the substrate is adjusted according to the detection result, so that the substrate can be raised and lowered as a whole and deformed locally, thereby improving the flatness and horizontality of the surface to be coated of the substrate, and maintaining a certain distance between the substrate and the coating device, thereby improving the uniformity of slurry coating, and finally the surface to be coated of the substrate is precisely coated by the coating device, thereby achieving the effect of improving the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the air flotation coating machine of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the state in which the supporting member of the present invention supports the substrate;

[0032] Figure 3 It is a schematic structural diagram of the coating device of the present invention.

[0033] In the figure:

[0034] 100. substrate; 1. base; 11. supporting member; 2. conveying device; 3. coating device; 31. coating frame; 311. crossbeam; 32. coating blade; 321. adjusting member; 4. adjusting device; 41. sensor; 42. calibration platform; 421. reference plane; 43. calibration bracket; 431. brush wheel. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] Refer to the following Figures 1 to 3 The air flotation coater provided by the present invention is described.

[0040] The air flotation coating machine comprises a base 1, a conveying device 2, a coating device 3 and an adjusting device 4. A supporting member 11 is arranged on the base 1. The conveying device 2 is arranged above the base 1. The supporting member 11 can support a substrate 100. The conveying device 2 can convey the substrate 100 supported by the supporting member 11 along a preset direction. The coating device 3 is located above the supporting member 11. The coating device 3 can coat the substrate 100 conveyed by the conveying device 2 to the bottom of the coating device 3. The adjusting device 4 is configured to detect the flatness and horizontality of the substrate 100, and control the supporting member 11 to adjust the supporting force of each supporting point acting on the substrate 100.

[0041] Specifically, the supporting member 11 can support the substrate 100 at multiple points, and can adjust the supporting force of each supporting point on the substrate 100. The supporting member 11 in this embodiment is an air flotation platform, and the substrate 100 is supported at multiple points through multiple air outlets on the air flotation platform, so that each air outlet forms a supporting point. A valve is provided at each air hole on the air flotation platform, and the air outlet volume at each air hole is adjusted by adjusting the opening of the valve to adjust the supporting force on the substrate 100, which can realize the overall lifting and layout correction of the substrate 100, improve the flatness and horizontality of the substrate 100 itself, and finally make the surface to be coated of the substrate 100 (i.e., the upper surface of the substrate 100) in a horizontal and flat state. It should be noted that the supporting member 11 can be set to be equal in length to the base 1, or set to be shorter than the length of the base 1, and the specific form is not limited.

[0042] Optionally, in other embodiments, the supporting member 11 may also be a platform with a plurality of support rods on the upper surface, each support rod is vertically arranged, and the top end of the support rod is in contact with the substrate 100. Each support rod is driven to rise and fall by a servo motor to support the substrate 100 at multiple points, and the supporting force of each supporting point on the substrate 100 can be adjusted.

[0043] Exemplarily, the conveying device 2 in this embodiment includes a guide rail, a slider and a suction cup. The guide rail is horizontally arranged on the base 1 and connected to the base 1. The length direction of the guide rail is parallel to the conveying direction of the substrate 100. Two guide rails are arranged in parallel, and the two guide rails are respectively located on opposite sides of the support member 11. A slider is slidably arranged on each guide rail, and the sliding of each slider is driven by a rotating screw. Specifically, the screw is arranged parallel to the guide rail, the screw is rotatably connected to the base 1, the screw passes through the slider and is threadedly connected to the slider, and the screw is driven to rotate by a motor. The suction cup is connected to the slider, and the substrate 100 is adsorbed by the suction cup. When the motor rotates, the slider is driven to slide along the guide rail, so that the suction cup drives the substrate 100 to move, thereby realizing the conveying of the substrate 100. In other embodiments, the slider can also be driven to move by components such as chains and conveyor belts, and the specific method is not limited.

[0044] The coating device 3 includes a coating frame 31 and a coating blade 32. A crossbeam 311 is slidably connected to the coating frame 31. The crossbeam 311 is horizontally arranged, and the length direction of the crossbeam 311 is perpendicular to the conveying direction of the substrate 100. The crossbeam 311 is located above the supporting member 11, and the crossbeam 311 slides in the vertical direction. In this embodiment, the sliding of the crossbeam 311 is driven by a servo motor arranged on the coating frame 31. In other embodiments, the sliding of the crossbeam 311 can also be driven by components such as a cylinder or an oil cylinder.

[0045] Further, the coating blade 32 is located below the crossbeam 311 and is arranged parallel to the crossbeam 311. The crossbeam 311 and the coating blade 32 are connected by an adjusting member 321. A plurality of adjusting members 321 are arranged along the length direction of the coating blade 32. Six adjusting members 321 are used as an example in this embodiment. The adjusting members 321 can adjust the distance between the crossbeam 311 and the coating blade 32. Exemplarily, the adjusting member 321 in this embodiment is a servo motor, the housing of the servo motor is hinged to the crossbeam 311, and the actuator rod of the servo motor is hinged to the coating blade 32. The local height of the coating blade 32 can be precisely adjusted by the six servo motors, so that the coating blade 32 is always in a horizontal state, that is, the coating blade 32 is parallel to the surface to be coated of the substrate 100 in a horizontal state.

[0046] The adjustment device 4 includes a sensor 41, a controller, a correction bracket 43 and a correction platform 42. The sensor 41 is connected to the coating blade 32. A plurality of sensors 41 are arranged along the length direction of the coating blade 32. The sensors 41 and the adjustment members 321 are arranged one by one. The sensor 41 in this embodiment is any distance sensor in the prior art. The controller is connected to the base 1, and all sensors 41, all adjustment members 321 and the support member 11 are electrically connected to the controller.

[0047] Furthermore, the correction bracket 43 is slidably arranged above the base 1, and the correction bracket 43 slides along a conveying direction parallel to the substrate 100. In this embodiment, a slide rail is arranged on the base 1 corresponding to the correction bracket 43, and the slide rail is parallel to the conveying direction of the substrate 100. The correction bracket 43 is slidably connected to the slide rail, and the sliding of the correction bracket 43 is driven by a screw rod. The specific driving method is carried out with reference to the driving method of the slider. In other embodiments, brackets supporting the slide rails can also be separately arranged on both sides of the length direction of the base 1, or the slide rails can be suspended above the base 1, and the specific form is not limited.

[0048] The calibration platform 42 is connected to the calibration bracket 43, so that the calibration platform 42 can slide synchronously with the calibration bracket 43, so that the calibration platform 42 can move to the bottom of the sensor 41 to calibrate the distance between each sensor 41 and the reference plane 421. The calibration platform 42 is made of marble, granite, vacuum stone or stainless steel. In this embodiment, marble is used as an example, and the top of the calibration platform 42 is processed with a reference plane 421. The marble material has the advantages of fine and hard texture, high compressive strength, low water absorption, easy processing, good opening, etc., which can ensure the flatness of the reference plane 421, and is stable in operation and not easy to deform.

[0049] Based on the above, when the conveying device 2 conveys the substrate 100 to be coated and passes under the sensor 41, the sensor 41 detects the distance between itself and the substrate 100, and transmits the generated electrical signal to the controller, and the controller calculates the levelness and flatness of the upper surface of the substrate 100. At this time, if the controller calculates that the levelness and flatness of the upper surface of the substrate 100 are within the error range, it is determined that the flatness of the coating area is normal. Then the substrate 100 can be coated, and the substrate 100 is conveyed by the conveying device 2 to pass under the coating blade 32. In this process, the coating blade 32 coats the slurry on the upper surface of the substrate 100.

[0050] If the controller calculates that the levelness and flatness of the upper surface of the substrate 100 are abnormal, the flatness of the coating area is determined to be abnormal, and then the origin test is first performed on the position of each sensor 41. During the origin test, the controller first controls the correction bracket 43 to drive the correction platform 42 to slide to the bottom of the sensor 41, and then each sensor 41 detects the distance between itself and the reference plane 421, and transmits the generated electrical signal to the controller. The controller determines whether the position of the sensor 41 is abnormal based on the distance between each sensor 41 and the reference plane 421. If the position of the sensor 41 is normal, that is, the origin test is normal, the controller adjusts the supporting force of each supporting point on the supporting member 11 on the substrate 100 according to the detection data of the sensor 41 on the substrate 100, that is, controls the gas outlet of each gas outlet on the air floating platform, so that the substrate 100 is in a horizontal and flat state, and then the coating operation can be carried out to improve the uniformity of the coating and ultimately improve the quality of the coating.

[0051] If the origin test is abnormal, the controller needs to control the adjusting member 321 to adjust the height of each sensor 41 so that the sensor 41 is at the origin position, thereby preventing the position error of the sensor 41 from affecting the detection accuracy of the sensor 41 on the substrate 100, and then the correction bracket 43 drives the correction platform 42 to return to its original position. The horizontality and flatness of the upper surface of the substrate 100 are detected again in the above manner, and the supporting force of each supporting point on the substrate 100 is adjusted by the supporting member 11 to make the substrate 100 in a horizontal and flat state, and then the coating operation is performed, so that the surface coating of the substrate 100 is finally more uniform, and the coating quality of the substrate 100 is improved.

[0052] In addition, a brush wheel 431 is rotatably connected to the correction bracket 43, and the axis of the brush wheel 431 is parallel to the length direction of the coating blade head 32. The rotation of the brush wheel 431 is driven by a motor. The coating blade head 32 can be cleaned by the brush wheel 431 to remove the substances attached to the coating blade head 32 and keep the coating blade head 32 clean. After the brush wheel 431 has been used for a period of time, the circular runout of the brush wheel 431 when it rotates can be detected by the sensor 41 after the origin test, so as to detect whether the brush wheel 431 needs to be replaced to ensure the cleaning effect of the coating blade head 32.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An air flotation coating machine, comprising a base (1), a conveying device (2) and a coating device (3), characterized in that: The base (1) is provided with a supporting member (11), and the supporting member (11) is capable of supporting the substrate (100) at multiple points, and is capable of adjusting the supporting force of each supporting point acting on the substrate (100); The conveying device (2) is arranged on the base (1), and the conveying device (2) is capable of conveying the substrate (100) along a preset direction and allowing the substrate (100) to be located above the supporting member (11); The coating device (3) is located above the supporting member (11), and the coating device (3) is capable of coating the substrate (100) transported by the transport device (2) to the bottom of the coating device (3); The air flotation coating machine further comprises an adjusting device (4), wherein the adjusting device (4) is configured to detect the flatness and horizontality of the substrate (100), and to control the supporting member (11) to adjust the supporting force of each supporting point acting on the substrate (100).

2. The air flotation coating machine according to claim 1, characterized in that: The coating device (3) comprises: a coating rack (31); and A coating knife head (32), the coating knife head (32) is located above the supporting member (11), and the coating knife head (32) is connected to the coating frame (31).

3. The air flotation coating machine according to claim 2, characterized in that: A crossbeam (311) is slidably connected to the coating frame (31) in a vertical direction, and the coating blade head (32) is connected to the bottom of the crossbeam (311).

4. The air flotation coating machine according to claim 3, characterized in that: The regulating device (4) comprises: A sensor (41), wherein the sensor (41) is arranged on the coating blade head (32), and a plurality of the sensors (41) are arranged along the length direction of the coating blade head (32); and A controller is electrically connected to the sensor (41) and the supporting member (11).

5. The air flotation coating machine according to claim 4, characterized in that: The regulating device (4) further comprises: A calibration platform (42), wherein a reference plane (421) is arranged on the top of the calibration platform (42), and the calibration platform (42) can be moved to the bottom of the sensor (41) to calibrate the distance between each sensor (41) and the reference plane (421); The crossbeam (311) and the coating blade head (32) are connected via an adjusting member (321). A plurality of adjusting members (321) are provided along the length direction of the coating blade head (32). The adjusting member (321) can adjust the distance between the crossbeam (311) and the coating blade head (32). The adjusting member (321) is electrically connected to the controller.

6. The air flotation coating machine according to claim 5, characterized in that: The sensor (41) and the adjusting member (321) are arranged in a one-to-one correspondence.

7. The air flotation coating machine according to claim 5, characterized in that: The calibration platform (42) is made of marble, granite, vacuum stone or stainless steel.

8. The air flotation coating machine according to claim 5, characterized in that: The regulating device (4) further comprises: A correction bracket (43), wherein the correction bracket (43) is slidably disposed above the base (1), the correction bracket (43) slides along a conveying direction parallel to the substrate (100), and the correction platform (42) is connected to the correction bracket (43).

9. The air flotation coating machine according to claim 8, characterized in that: A brush wheel (431) is rotatably arranged on the correction bracket (43), the axis of the brush wheel (431) is parallel to the length direction of the coating blade head (32), and the brush wheel (431) can clean the coating blade head (32).

10. The air flotation coating machine according to any one of claims 1 to 9, characterized in that: The supporting member (11) is an air floating platform.

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