A PCB coating device and coating system with controllable coating area

Abstract

The present invention relates to the field of PCB board coating devices, and specifically to a PCB board coating system with a controllable and adjustable coating area. The PCB board coating system includes a multi-axis robot and a PCB board coating device. The PCB board coating device includes a glue dropper and a plurality of glue dropper strips. One end of the glue dropper disc in the axial direction is provided with a rectangular glue outlet hole, and the other end is provided with a glue injection hole. The glue dropper disc can rotate around its own axis to change the angle of the glue outlet hole. The plurality of glue dropper strips are attached to the glue dropper disc and cover the glue outlet hole. Each glue dropper strip is provided with a glue dropper hole. The glue dropper strip can move along its own length direction to change the position of the glue dropper hole. The embodiment of the present invention changes the shape and area of ​​the overlapping portion of the glue outlet hole and the glue dropper hole by changing the angle of the glue dropper disc and the position of the glue dropper strip, so that the PCB board coating device forms coating patterns of different areas and shapes on the PCB board.

Description

Technical Field

[0001] The invention relates to the field of PCB coating devices, and in particular to a PCB coating device with a controllable and adjustable coating area.

[0002] The invention also relates to a PCB board coating system. Background Art

[0003] A traditional photocuring adhesive coating machine includes a multi-axis robot and at least one spray gun. Each spray gun corresponds to an independent glue injection pump. The glue injection pump draws the photocuring adhesive from the storage container of the photocuring adhesive and then sprays it out through the spray gun. Different spray guns have nozzles of different calibers and shapes.

[0004] Since the sprayable area and sprayable width of different parts of the PCB board are also different, in order to achieve the highest efficiency of spraying, different spray guns need to be used at different positions of the PCB board, such as using a coarser-caliber spray gun in a wide spraying area and a finer-caliber spray gun in a narrow spraying area.

[0005] Since increasing the number of spray guns will increase the cost and complexity of the equipment, traditional photocuring adhesive coating machines only have 1 to 2 spray guns, which are difficult to match the complex and changeable spray patterns on PCB boards. The edges of the spraying parts of the spray guns are prone to areas that need to be re-coated, which significantly reduces the spraying efficiency. However, 3 or even more spray guns will significantly increase the cost and complexity of the equipment. Summary of the invention

[0006] The object of the present invention is to provide a PCB coating device and a coating system with controllable and adjustable coating area, so as to solve the problem that the nozzle size of the traditional PCB coating device is fixed and difficult to adapt to different coating requirements.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] The present invention provides a PCB board coating device with a controllable and adjustable coating area, comprising:

[0009] A glue dripping tray, wherein one end of the glue dripping tray in the axial direction is provided with a rectangular glue outlet hole, and the other end is provided with a glue injection hole, a cavity for temporarily accommodating light-curing glue is formed between the glue outlet hole and the glue injection hole, and the light-curing glue is injected into the interior of the cavity through the glue injection hole;

[0010] A glue dripping plate, attached to the glue dripping tray and covering the glue outlet hole, the glue dripping plate comprising a plurality of glue dripping strips arranged side by side along its width direction, each of the glue dripping strips being provided with at least one glue dripping hole, a plurality of glue dripping holes forming a glue dripping hole group, the glue outlet hole and the overlapping area of ​​the glue dripping hole group forming a glue outlet channel allowing the light-curing glue to move from the inside of the cavity to the outside of the cavity;

[0011] The glue dripping plate can rotate around its own axis, thereby changing the angle of the glue outlet hole;

[0012] The glue dripping strip can move along its length direction to change the position of the glue dripping hole, thereby changing the shape of the glue dripping hole group;

[0013] As the glue dropping plate and the glue dropping strip move, the area and shape of the glue outlet channel are changed, so that the light-curing glue forms coating patterns of different areas and shapes on the PCB board.

[0014] Furthermore, it also includes a bracket, a rotating motor and a linear motor. The glue dripping plate is rotatably connected to the bracket, the glue dripping plate is transmission connected to the actuator of the rotating motor, the glue dripping strip is slidably connected to the bracket, and the glue dripping strip is transmission connected to the actuator of the linear motor.

[0015] Furthermore, one end of the glue dripping plate away from the glue outlet hole is connected to a rotating shaft, the rotating shaft is connected to the bracket through a bearing, and the rotating shaft is connected to the output shaft of the rotating motor through a coupling.

[0016] Furthermore, the rotating shaft is hollow, one end of the rotating shaft is connected to the glue outlet hole, and the other end of the rotating shaft is connected to the glue injection pump through a glue injection tube that radially penetrates the rotating shaft. The glue injection pump is used to extract photocuring glue from a storage container of the photocuring glue, and then output it to the inside of the glue outlet hole through the glue injection tube and the rotating shaft. The photocuring glue accumulated between the glue outlet hole and the glue dripping plate drips toward the PCB board through several of the glue dripping holes.

[0017] Furthermore, when the number of the glue dripping holes on each of the glue dripping strips is greater than 1, the glue dripping holes are distributed at equal intervals along the length direction of the glue dripping strip.

[0018] Furthermore, the distance between the axes of two adjacent glue dripping holes on each of the glue dripping strips is greater than the diameter of the glue dripping hole and less than twice the diameter of the glue dripping hole.

[0019] Furthermore, the distance between the axes of two adjacent glue dripping holes is 1.25 times the diameter of the glue dripping hole, and the width of the glue dripping strip is equal to the distance between the axes of two adjacent glue dripping holes on each glue dripping strip.

[0020] Furthermore, there is an angle of 45° between the length direction of the glue dripping strip and the length direction of the glue outlet hole.

[0021] Furthermore, chamfers are arranged at the four corners of the glue outlet hole, and the waist length of the chamfers is equal to the width of the glue dripping strip.

[0022] The present invention also provides a PCB board coating system, which has a PCB board coating device. The coating system includes a multi-axis robot, and the PCB board coating device is installed on the execution part of the multi-axis robot. The multi-axis robot moves according to a preset path and speed, so that the PCB board coating device performs a spraying operation at a specified position of the PCB board. The angle of the glue drop plate and the position of the glue drop strip are changed respectively by the rotating motor and the linear motor, so that the light-curing glue is sprayed at different positions on the PCB board through the glue outlet channels of other areas and shapes.

[0023] Compared with the prior art, this application has the following beneficial effects:

[0024] Provided are a PCB coating device and a coating system with a controllable and adjustable coating area. In an embodiment of the present invention, a slidable glue strip is spliced ​​into a glue plate with a plurality of glue holes, and the arrangement shape of the glue holes is changeable. Then, a photocuring glue is output to the glue plate through a rotatable glue outlet hole. By changing the shape and area of ​​the overlapping portion of the glue outlet hole and the glue outlet hole, the coating pattern of the photocuring glue is changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] Figure 1 A side view of an embodiment of the present invention;

[0027] Figure 2 It is a front view of a light-curing adhesive coating unit according to an embodiment of the present invention;

[0028] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0029] Figure 4 This is a bottom view of a light-curing adhesive coating unit according to an embodiment of the present invention, in which the adhesive dripping plate is transparent;

[0030] Figure 5 A three-dimensional diagram of a glue dispenser according to an embodiment of the present invention;

[0031] Figure 6 A three-dimensional diagram of a glue dropper strip and a linear motor according to an embodiment of the present invention;

[0032] Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 Schematic diagram of different glue dripping patterns composed of glue dripping trays of different shapes and glue dripping plates of different angles according to an embodiment of the present invention. The solid rectangular frame in the figure is a glue dripping strip, the dotted rectangular frame is a glue outlet hole, the circle with a shadow is the shape of the light-curing glue dripping onto the PCB board, and the hollow arrow in the figure is the movement direction of the glue dripping strip and the glue dripping tray;

[0033] The numbers in the figure represent the following:

[0034] 1-PCB board; 2-multi-axis robot; 21-bracket; 22-rotating motor; 23-linear motor; 24-bearing; 3-glue plate; 31-glue outlet hole; 32-chamfer; 33-rotating shaft; 34-glue injection hole; 4-glue plate; 41-glue strip; 42-glue hole; 43-connecting block; 5-glue pattern. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Since the sprayable area and sprayable width of different parts on the PCB board 1 are different, the caliber and shape of the optimal spray gun are also different. 1~2 spray guns are not enough to adapt to all specifications of PCB boards 1. The edges of the spraying parts of the spray guns are always prone to parts that need to be re-coated, which significantly reduces the spraying efficiency. However, 3 or even more spray guns will significantly increase the cost and complexity of the equipment.

[0037] In order to solve this problem, this embodiment provides a coating system with a controllable and adjustable coating area.

[0038] Figure 1 A side view of the PCB coating system is shown, combined with Figure 1The PCB board coating system includes: a multi-axis robot 2 and a PCB board coating device. The PCB board coating device is installed on the execution part of the multi-axis robot 2. The multi-axis robot 2 moves according to a preset path and speed, so that the PCB board coating device performs a spraying operation at a specified position of the PCB board 1 to ensure that the photocuring adhesive is evenly covered in the required area.

[0039] Figure 2 The main view of the PCB coating device is shown. Figure 3 Shown Figure 2 The cross-sectional view in the AA direction, Figure 4 A bottom view of the PCB coating device is shown. Figure 4 Some parts in the are transparent, combined with Figure 2 , Figure 3 , Figure 4 , PCB board coating device includes:

[0040] The glue dripping plate 3 has a rectangular glue outlet hole 31 at one end in the axial direction and a glue injection hole 34 at the other end. A cavity for temporarily accommodating the photocuring glue is formed between the glue outlet hole 31 and the glue injection hole 34. The photocuring glue is injected into the cavity through the glue injection hole 34.

[0041] The glue dripping plate 4 is attached to the glue dripping tray 3 and covers the glue outlet hole 31. The glue dripping plate 4 includes a plurality of glue dripping strips 41 arranged side by side along its width direction. Each glue dripping strip 41 is provided with at least one glue dripping hole 42. Several glue dripping holes 42 form a glue dripping hole group. The overlapping area of ​​the glue outlet hole 31 and the glue dripping hole group forms a glue outlet channel that allows the light-curing glue to move from the inside of the cavity to the outside of the cavity.

[0042] The glue drop plate 3 can rotate around its own axis to change the angle of the glue outlet hole 31. The glue drop strip 41 can move along its own length direction to change the position of the glue drop hole 42, thereby changing the shape of the glue drop hole group. As the glue drop plate 3 and the glue drop strip 41 move, the area and shape of the glue outlet channel are changed, so that the light-curing glue forms coating patterns of different areas and shapes on the PCB board 1.

[0043] Specific:

[0044] Combination Figure 2 and Figure 3 The executive part of the multi-axis robot 2 is fixedly installed with a bracket 21, a rotating motor 22 and a linear motor 23. The glue dropping plate 3 is rotatably connected to the bracket 21, and the glue dropping plate 3 is transmission connected to the executive part of the rotating motor 22. The glue dropping strip 41 is slidably connected to the bracket 21, and the glue dropping strip 41 is transmission connected to the executive part of the linear motor 23.

[0045] Combination Figure 3The end of the glue dripping plate 3 away from the glue outlet hole 31 is connected with a rotating shaft 33, the rotating shaft 33 is connected to the bracket 21 through the bearing 24, and the rotating shaft 33 is connected to the output shaft of the rotating motor 22 through the coupling. The rotating shaft 33 is hollow, one end of the rotating shaft 33 is connected to the glue outlet hole 31, and the other end of the rotating shaft 33 is connected to the glue injection pump through the glue injection tube that radially penetrates the rotating shaft 33. The glue injection pump is used to extract the light-curing glue from the storage container of the light-curing glue, and then output it to the inside of the glue outlet hole 31 through the glue injection tube and the rotating shaft 33. The light-curing glue accumulated between the glue outlet hole 31 and the glue dripping plate 4 drips toward the PCB board 1 through a plurality of glue dripping holes 42. Figure 3 The coupling, injection pump and storage container are not shown.

[0046] Figure 6 The glue strip 41 and the linear motor 23 are shown, combined with Figure 6 Connecting blocks 43 are provided at both ends of the glue dripping strip 41 , and the connecting blocks 43 are fixedly connected to the actuator of the linear motor 23 .

[0047] Combination Figure 4 Other things that need to be explained are:

[0048] When the number of the glue dripping holes 42 on each glue dripping strip 41 is greater than 1, the glue dripping holes 42 are evenly spaced along the length direction of the glue dripping strip 41 . The number of the glue dripping holes 42 on each glue dripping strip 41 is preferably 2.

[0049] The distance between the axes of two adjacent glue holes 42 on each glue dripping strip 41 is greater than the diameter of the glue dripping hole 42 and less than twice the diameter of the glue dripping hole 42 . The distance between the axes of two adjacent glue dripping holes 42 is preferably 1.25 times the diameter of the glue dripping hole 42 .

[0050] The width of the glue dripping strip 41 is equal to the distance between the axes of two adjacent glue dripping holes 42 on each glue dripping strip 41 .

[0051] The length direction of the glue dripping strip 41 and the length direction of the glue outlet hole 31 form an angle of 45°.

[0052] Figure 5 A three-dimensional image of the glue tray 3 is shown, combined with Figure 5 The four corners of the glue outlet hole 31 are provided with chamfers 32 , and the length of the right-angled side of the chamfer 32 is equal to the width of the glue dripping strip 41 . The chamfer 32 is used to reduce the number of glue dripping strips 41 required to completely cover the glue outlet hole 31 .

[0053] The following describes the working principle of the PCB coating device. Figures 7 to 12Six different glue dripping patterns 5 are shown. The solid rectangular frame in the figure is the glue dripping strip 41, the dotted rectangular frame is the glue outlet hole 31, the shaded circle is the shape of the photocuring glue dripping onto the PCB board, and the hollow arrow in the figure is the movement direction of the glue dripping strip 41 and the glue dripping plate 3.

[0054] Combination Figures 7 to 12 With the movement of the glue dropper strip 41 and the rotation of the glue dropper plate 3, the PCB coating device can form at least six different glue dropper patterns 5, such as Figures 7 to 10 The continuous rectangular glue dripping pattern 5 shown, and Fig.11 and Fig.12 The rectangular glue dripping pattern 5 is shown as being disconnected in the middle.

[0055] Figures 7 to 12 The PCB board coating device in the figure moves from the left side to the right side of the figure, and the light-curing adhesive dripped onto the PCB board spreads around itself and then fills the surface of the PCB board.

[0056] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A PCB coating device with a controllable coating area, characterized in that: include: A glue dripping plate (3), wherein one end of the glue dripping plate (3) in the axial direction is provided with a rectangular glue outlet hole (31), and the other end is provided with a glue injection hole (34), a cavity for temporarily accommodating light-curing glue is formed between the glue outlet hole (31) and the glue injection hole (34), and the light-curing glue is injected into the interior of the cavity through the glue injection hole (34); A glue dripping plate (4) is attached to the glue dripping plate (3) and covers the glue outlet hole (31), the glue dripping plate (4) comprising a plurality of glue dripping strips (41) arranged side by side along its width direction, each of the glue dripping strips (41) being provided with at least one glue dripping hole (42), a plurality of glue dripping holes (42) forming a glue dripping hole group, and an overlapping area between the glue outlet hole (31) and the glue dripping hole group forming a glue outlet channel allowing the light-curing glue to move from the inside of the cavity to the outside of the cavity; The glue dripping plate (3) is capable of rotating around its own axis, thereby changing the angle of the glue outlet hole (31); The glue dripping strip (41) is capable of moving along its own length direction to change the position of the glue dripping hole (42), thereby changing the shape of the glue dripping hole group; As the glue dropping plate (3) and the glue dropping strip (41) move, the area and shape of the glue outlet channel are changed, so that the light-curing glue forms coating patterns of different areas and shapes on the PCB board (1).

2. A PCB coating device with a controllable coating area according to claim 1, characterized in that: The invention also comprises a bracket (21), a rotary motor (22) and a linear motor (23); the glue-dropping disc (3) is rotatably connected to the bracket (21); the glue-dropping disc (3) is drivingly connected to an actuator of the rotary motor (22); the glue-dropping strip (41) is slidably connected to the bracket (21); and the glue-dropping strip (41) is drivingly connected to an actuator of the linear motor (23).

3. A PCB coating device with a controllable coating area according to claim 2, characterized in that: One end of the glue dripping plate (3) away from the glue outlet hole (31) is connected to a rotating shaft (33), the rotating shaft (33) is connected to the bracket (21) via a bearing (24), and the rotating shaft (33) is connected to the output shaft of the rotating motor (22) via a coupling.

4. A PCB coating device with a controllable coating area according to claim 3, characterized in that: The rotating shaft (33) is hollow; one end of the rotating shaft (33) is connected to the glue outlet hole (31); the other end of the rotating shaft (33) is connected to a glue injection pump via a glue injection tube that radially penetrates the rotating shaft (33); the glue injection pump is used to extract light-curing glue from a storage container of light-curing glue, and then output it to the inside of the glue outlet hole (31) through the glue injection tube and the rotating shaft (33); the light-curing glue accumulated between the glue outlet hole (31) and the glue dripping plate (4) drips toward the PCB board (1) through the plurality of glue dripping holes (42).

5. A PCB coating device with a controllable coating area according to any one of claims 2 to 4, characterized in that: When the number of the glue dripping holes (42) on each of the glue dripping strips (41) is greater than 1, the glue dripping holes (42) are distributed at equal intervals along the length direction of the glue dripping strip (41).

6. A PCB coating device with a controllable coating area according to claim 5, characterized in that: The distance between the axes of two adjacent glue dripping holes (42) on each glue dripping strip (41) is greater than the diameter of the glue dripping hole (42) and less than twice the diameter of the glue dripping hole (42).

7. A PCB coating device with a controllable coating area according to claim 6, characterized in that: The distance between the axes of two adjacent glue dripping holes (42) is 1.25 times the diameter of the glue dripping hole (42), and the width of the glue dripping strip (41) is equal to the distance between the axes of two adjacent glue dripping holes (42) on each glue dripping strip (41).

8. The PCB coating device with controllable coating area according to claim 7, characterized in that: There is an angle of 45° between the length direction of the glue dripping strip (41) and the length direction of the glue outlet hole (31).

9. A PCB coating device with a controllable coating area according to claim 8, characterized in that: Chamfers (32) are provided at the four corners of the glue outlet hole (31), and the waist length of the chamfers (32) is equal to the width of the glue dripping strip (41).

10. A PCB coating system, characterized in that: A PCB board coating device according to any one of claims 2 to 9; The coating system comprises a multi-axis robot (2), the PCB board coating device being mounted on an actuator of the multi-axis robot (2), the multi-axis robot (2) moving according to a preset path and speed, so that the PCB board coating device performs a spraying operation at a specified position of the PCB board (1), and the angle of the glue drop plate (3) and the position of the glue drop strip (41) are respectively changed by the rotary motor (22) and the linear motor (23), so that the light-curing glue is sprayed at different positions on the PCB board (1) through the glue outlet channels of other areas and shapes.

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