Circuit board developing sweeping and spraying device

Abstract

The utility model discloses a circuit board developing, sweeping and spraying device which comprises a transmission assembly and a spraying assembly, the transmission assembly comprises roller sets which are sequentially arranged in the conveying direction of a circuit board, the spraying assembly comprises a spraying pipe set which is arranged in the conveying direction, the spraying pipe set is used for spraying developing liquid medicine to the circuit board conveyed along the roller sets, and the circuit board developing, sweeping and spraying device further comprises a translation assembly, the translation assembly comprises a frame body, a driving unit and a plurality of guide wheels; the spray pipe group comprises a main pipe and a plurality of branch spray pipes; the branch spray pipes are installed on the frame body and can move along with the frame body, the extension directions of the multiple branch spray pipes are arranged to be parallel to one another and located on the same horizontal plane, and the extension directions of the branch spray pipes incline relative to the conveying direction; a plurality of nozzles are sequentially arranged on the sides, facing the circuit board, of the branch spray pipes in the extending direction, the main pipe is communicated with the branch spray pipes, and developing liquid is input into the branch spray pipes through the main pipe and sprayed out to the circuit board through the nozzles; the frame body comprises at least two guide rails, and the driving unit is connected to the frame body and used for driving the frame body to reciprocate on the guide wheels. According to the utility model, the uniformity of developing and spraying of the circuit board can be improved.

Description

Technical Field

[0001] The utility model relates to the field of circuit board manufacturing, and particularly to a developing spraying device for circuit boards. Background Art

[0002] In the developing process of circuit boards, developing liquid is sprayed onto the conveyed circuit boards to remove the dry film that has not been cured by the exposure machine. In order to achieve comprehensive and uniform developing on the circuit board surface, multiple nozzles need to be evenly arranged along the conveying direction of the circuit board for spraying. However, since the liquid spraying shape of each nozzle is conical, the amount of liquid medicine and the liquid spraying flow rate at each position of the liquid sprayed by each nozzle are different. At the same time, there is liquid spraying intersection or liquid spraying interval between adjacent nozzles, resulting in uneven spraying of the developing liquid on the circuit board and affecting the yield of circuit board production.

[0003] In view of the above problems, a device for spraying developing liquid is needed to make the liquid medicine received at each position of the circuit board uniform, thereby improving the production yield. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a developing spraying device for circuit boards that can improve the uniformity of developing liquid spraying in the developing process of circuit boards.

[0005] A developing spraying device for circuit boards provided by the utility model includes a transmission component and a spraying component. The transmission component includes a roller group arranged in sequence along the conveying direction of the circuit board. The spraying component includes a spray pipe group arranged along the conveying direction. The spray pipe group is used to spray developing liquid onto the circuit board conveyed along the roller group. The device further includes a translation component, which includes a frame body, a driving unit, and several guide wheels. The spray pipe group includes a main pipe and several branch spray pipes. The branch spray pipes are installed on the frame body and can move with the frame body. The extending directions of the several branch spray pipes are set to be parallel to each other and located in the same horizontal plane, and the extending direction of the branch spray pipes is inclined relative to the conveying direction. Along the extending direction, several nozzles are sequentially arranged on the side of the branch spray pipes facing the circuit board. The main pipe is communicated with the several branch spray pipes. The developing liquid is input into the branch spray pipes through the main pipe and sprayed onto the circuit board by the nozzles. The frame body includes at least two guide rails. The extending direction of the guide rails is in the horizontal plane and perpendicular to the conveying direction. The guide rails are slidably connected to the guide wheels along their extending direction. The driving unit is connected to the frame body and is used to drive the frame body to reciprocate on the guide wheels.

[0006] As can be seen from the above solution, the translation component is set to reciprocate and spray vertically perpendicular to the conveying direction with the frame body installed with the branch spray pipes, so as to eliminate the problem of insufficient uniformity of the developing liquid in this direction. At the same time, the extending direction of the branch spray pipes is inclined at a certain angle relative to the conveying direction, so that two adjacent rows of nozzles in the conveying direction are misaligned, and the conical liquid spraying shapes can fill the spraying gaps in a staggered manner, thereby also improving the uniformity of spraying.

[0007] A preferred solution is that the nozzle group includes two groups along the conveying direction, and the branch nozzles of the two nozzle groups are axially symmetrically arranged along a center line perpendicular to the conveying direction.

[0008] It can be seen that setting two groups of nozzle groups along the transmission direction can adapt to different linear speeds of circuit board transmission. At the same time, the inclination directions of the branch nozzles of the two groups of nozzle groups are opposite, which can eliminate the problem of reduced uniformity caused by unidirectional inclination.

[0009] A further solution is that nozzle groups are arranged opposite to each other on the upper and lower sides of the circuit board, the number of frames matches the number of nozzle groups, and each nozzle group is installed on a corresponding frame.

[0010] It can be seen that by arranging corresponding nozzle groups on the upper and lower sides of the circuit board conveyed along the conveying direction, it is possible to spray development on both sides of the circuit board at the same time. At the same time, each nozzle group is installed corresponding to a frame, and the overall structure is modular, which is easy to install and maintain.

[0011] A further solution is that the frame includes a crossbar, and the crossbar is connected to a plurality of nozzles.

[0012] It can be seen that since the branch nozzle is relatively long, a cross bar is provided on the frame to support the branch nozzle.

[0013] A further solution is that a plurality of branch nozzles are arranged at equal intervals, the number of nozzles arranged on each branch nozzle is the same and they are arranged at equal intervals, and along the conveying direction, the nozzles in the same order on each branch nozzle are located in the same alignment direction, and the alignment direction is located in a horizontal plane and perpendicular to the conveying direction.

[0014] It can be seen that the nozzles of multiple branch nozzles are arranged in a very uniform matrix array. In addition, the same alignment direction is perpendicular to the conveying direction and also matches the rectangular shape of the circuit board, so that the amount of liquid sprayed on each part of the circuit board is the same.

[0015] A further solution is that the spraying directions of the nozzles in the same alignment direction are the same, and the spraying directions of the nozzles in adjacent alignment directions are different.

[0016] It can be seen that staggered spraying can allow the developer solution that falls into the circuit board to flow out as quickly as possible, avoiding the formation of a pool effect and excessive development, which will lead to a reduction in product yield.

[0017] A further solution is that the main pipe includes a first pipe body, a second pipe body, a hose and several connecting pipes, the hose connects the first pipe body and the second pipe body, the first pipe body is connected to a raw liquid tank for placing developer solution, the second pipe body is fixed to the frame and can move with the frame, and the second pipe body is connected to several branch nozzles through several connecting pipes.

[0018] It can be seen that the second tube body can move with the frame body, while the first tube body remains stationary to receive the developing solution in the stock solution tank, and the two can be connected through a hose.

[0019] A further solution is that at least a part of the hose is a corrugated pipe.

[0020] It can be seen that the corrugated pipe has good telescopic and transformation effects and excellent structural strength. Description of the Drawings

[0021] The present utility model will be further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the following drawings.

[0022] Figure 1 It is a top view of an embodiment of the present utility model.

[0023] Figure 2 It is a side view of an embodiment of the present utility model.

[0024] Figure 3 It is Figure 2 an enlarged view of part A of

[0025] Figure 4 It is a side view of the translation assembly and the spraying assembly of an embodiment of the present utility model.

[0026] Figure 5 It is a top view of the driving unit of an embodiment of the present utility model.

[0027] Figure 6 It is a structural diagram of the hose of an embodiment of the present utility model. Detailed Embodiments

[0028] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0029] For technologies, methods, and devices known to those of ordinary skill in the relevant fields, detailed discussions may not be made, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the specification.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0031] This embodiment provides a circuit board developing spraying device, as Figures 1 to 6 shown, which includes a transmission component and a spraying component. The transmission component includes a roller group 1 arranged in sequence along the transmission direction of the circuit board 4. The roller group 1 includes two rows of upper and lower roller groups 1, and the circuit board 4 can be transmitted therein. The spraying component includes a spray pipe group arranged along the transmission direction, and the spray pipe group is used to spray developing liquid on the circuit board 4 transmitted along the roller group 1. It further includes a translation component, and the translation component includes a frame body 31, a driving unit 32 and a number of guide wheels 33. The spray pipe group includes a main pipe and a number of branch spray pipes 22.

[0032] As Figures 1 to 4 shown, both ends of the branch spray pipe 22 are fixed to the frame body 31 and can move with the frame body 31. In this embodiment, the spray pipe group has a total of 8 branch spray pipes 22. The branch spray pipes 22 are parallel to each other and located in the same horizontal plane. The extending direction of the branch spray pipe 22 is inclined at an angle less than 90 degrees with respect to the transmission direction. Nine nozzles 23 are sequentially arranged on one side of each branch spray pipe 22 facing the circuit board 4 along its extending direction. The main pipe is respectively communicated with each branch spray pipe 22, and the developing liquid is input into the branch spray pipe 22 through the main pipe and sprayed out by the nine nozzles 23 on each branch spray pipe 22.

[0033] As Figures 1 to 4 shown, two guide rails 311 are arranged on both sides of the frame body 31. The extending direction of the guide rails 311 is in the horizontal plane and perpendicular to the transmission direction. The guide wheels 33 are fixed to the structural frame of this circuit board developing spraying device, and the guide rails 311 can be slidably connected to the guide wheels 33 along the extending direction. The driving unit 32 is connected to the frame body 31, and the driving unit 32 can drive the frame body 31 to reciprocate on the guide wheels 33 through the guide rails 311, so as to drive the branch spray pipes 22 located above the frame to reciprocate for spraying. Also see Figure 5, the driving unit 32 is fixed to one side of the frame 31. The driving unit 32 includes a motor 321, an eccentric wheel 322, and a fixing port 324. The driving end of the motor 321 is fixed to the eccentric shaft 325 of the eccentric wheel 322 and can drive the eccentric wheel 322 to rotate horizontally around the eccentric shaft 325. A sliding rod 326 is also slidably connected to the rim 327 of the eccentric wheel 322, and the sliding rod 326 is also fixedly connected to the fixing port 324. Since the frame 31 is limited by the guide wheel 311 to slide on the horizontal plane perpendicular to the conveying direction, by driving the eccentric wheel 322 to rotate by the motor 321 and the sliding of the sliding rod 326, the driving unit 32 can drive the frame 31 to reciprocate. At the same time, referring to Figure 4 , the driving unit 32 can drive the upper and lower two frames 31 to reciprocate simultaneously through the transmission shaft 323. It should be noted that the mechanical linkage device of this driving unit 32 can also be replaced by a device such as a cylinder that can achieve reciprocating movement.

[0034] In this embodiment, referring to Figure 1 As shown, from a top view, there are two groups of nozzle groups arranged along the conveying direction. The branch nozzles of the two groups of nozzle groups are arranged axially symmetrically along the center line perpendicular to the conveying direction. It should be noted that the extending directions of the branch nozzles 22 of the two groups are inclined at opposite angles with respect to the conveying direction, and the included angles between the extending directions of the branch nozzles 22 of the two groups and the conveying direction are the same, but the acute angles formed are on the opposite sides of the conveying direction. The combination of the two groups of nozzle groups reduces the influence of non-uniformity caused by one-way inclination.

[0035] In this embodiment, nozzle groups are correspondingly arranged on both the upper and lower sides of the circuit board 4 to spray the upper and lower sides of the circuit board 4 respectively. As Figure 1 and Figure 2 shown, there are a total of four groups of nozzle groups with two groups of branch nozzles 22 with opposite inclination directions arranged on both the upper and lower sides respectively. The two groups of nozzle groups that are opposite to each other up and down are on the same vertical line. There are four frames 31 in this embodiment, and each nozzle group is installed on one frame 31. In addition, as shown in the figure, each frame 31 includes a cross bar 312, and the branch nozzles 22 installed on the frame 31 are all connected to the cross bar 312, and the cross bar 312 plays a role in supporting the branch nozzles 22.

[0036] In this embodiment, as Figure 1As shown, eight branch spray pipes 22 are arranged at equal intervals, and nine nozzles 23 on each branch spray pipe 22 are also arranged at equal intervals. Along the conveying direction, the nozzles 23 of the same order on the eight branch spray pipes 22 are located in the same alignment direction, and this alignment direction is in the horizontal plane and perpendicular to the conveying direction. It should be noted that the above-mentioned same order refers to the order of the first to ninth nozzles 23 of each branch spray pipe 22 starting from the conveying direction. The nozzles 23 arranged in this way are very evenly arranged and can spray the surface of the circuit board 4 without dead angles. And particularly, the spraying directions of the nozzles 23 in the same alignment direction are the same, and the spraying directions of the nozzles 23 in adjacent different alignment directions are different. Through this setting, the developing solution accumulated on the board surface can flow out as soon as possible, avoiding poor development.

[0037] In this embodiment, as Figure 4 shown, the main pipe of each spray pipe group includes a first pipe body 211, a second pipe body 212, a hose 213 and a number of connecting pipes 214. Since the branch spray pipes 22 are installed on the frame 31 and can move translationally with the frame 31, and the stock solution tank for placing the developing solution for spraying is in a fixed state, the main pipe is divided into a first pipe body 211 communicating with the stock solution tank and a second pipe body 212 fixed to the frame 31 and communicating with the branch spray pipes 22. The first pipe body 211 and the second pipe body 212 are connected by a hose 213. As shown in the figure, a part of the middle of the hose 213 is set as a corrugated pipe 215, and its flexible structure can better cooperate with the movement of the frame 31. In addition, as Figure 1 shown, the second pipe body 212 communicates with each branch spray pipe 22 through connecting pipes 214 with the same number as the branch spray pipes 22 and outputs the developing solution to each branch spray pipe 22.

[0038] The above embodiments only represent one implementation manner of the present invention, and its description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A circuit board developing and spraying device, comprising a transmission component and a spraying component, wherein the transmission component comprises a roller group arranged in sequence along the transmission direction of the circuit board, and the spraying component comprises a nozzle group arranged along the transmission direction, and the nozzle group is used to spray a developing liquid on the circuit board conveyed along the roller group, characterized in that: It also includes a translation assembly, which includes a frame, a drive unit and a plurality of guide wheels, and the nozzle group includes a main nozzle and a plurality of branch nozzles; The branch nozzles are installed on the frame and can move with the frame, the extension directions of the plurality of branch nozzles are arranged to be parallel to each other and located in the same horizontal plane, and the extension directions of the branch nozzles are inclined relative to the conveying direction; The branch nozzles are provided with a plurality of nozzles in sequence along the extension direction on the side facing the circuit board, the main pipe is connected with the plurality of branch nozzles, the developer solution is input into the branch nozzles through the main pipe and sprayed to the circuit board by the nozzles; The frame includes at least two guide rails, the extension direction of the guide rails is located in a horizontal plane and perpendicular to the conveying direction, the guide rails are slidably connected to the guide wheels along their extension direction, the driving unit is connected to the frame, and the driving unit is used to drive the frame to reciprocate on the guide wheels.

2. A circuit board developing and spraying device according to claim 1, characterized in that: The nozzle group includes two groups along the conveying direction, and the branch nozzles of the two groups of nozzle groups are axially symmetrically arranged along a center line perpendicular to the conveying direction.

3. A circuit board developing and spraying device according to claim 2, characterized in that: The nozzle groups are arranged opposite to each other on the upper and lower sides of the circuit board, the number of the frames matches the number of the nozzle groups, and each group of the nozzle groups is installed on a corresponding one of the frames.

4. A circuit board developing and spraying device according to claim 3, characterized in that: The frame includes a cross bar, and the cross bar is connected to a plurality of branch nozzles.

5. A circuit board developing and spraying device according to claim 1, characterized in that: A plurality of branch nozzles are arranged at equal intervals, and the number of nozzles arranged on each branch nozzle is the same and is arranged at equal intervals. Along the conveying direction, the nozzles in the same order on each branch nozzle are located in the same alignment direction, and the alignment direction is located in a horizontal plane and perpendicular to the conveying direction.

6. A circuit board developing and spraying device according to claim 5, characterized in that: The ejection directions of the nozzles in the same alignment direction are the same, and the ejection directions of the nozzles in adjacent alignment directions are different.

7. A circuit board developing and spraying device according to any one of claims 1 to 6, characterized in that: The main pipe includes a first pipe body, a second pipe body, a hose and a plurality of connecting pipes, the hose connects the first pipe body and the second pipe body, the first pipe body is connected to a raw liquid tank for placing developer solution, the second pipe body is fixed to the frame and can move with the frame, and the second pipe body is connected to a plurality of branch nozzles through the plurality of connecting pipes.

8. A circuit board developing and spraying device according to claim 7, characterized in that: At least a portion of the hose is a bellows.

Images