CN111970840A - Printed circuit board etching device - Google Patents

Abstract

The invention relates to the technical field of circuit board production equipment, in particular to a printed circuit board etching device, comprising a conveyor belt and a clamping component connected to the conveyor belt. The clamping assembly includes a strut and at least two sets of jaws. One end of the support rod is connected to the conveyor belt, and the other end is connected to the clamping jaw. Each set of clamping jaws is provided with a driving member. The printed circuit board etching device of the present invention is provided with multiple groups of clamping claws and the multiple groups of clamping claws are controlled separately, so that each group of clamping claws clamps the circuit board in a time-sharing manner. During the etching process, it is only necessary to ensure that a set of clamping jaws are in the clamping state, so that the circuit board can be well clamped. Other gripping components are in a non-clamping state. This makes the clamping positions of the clamping assemblies on the circuit board in an empty state, so that the etchant can enter the clamping positions of the clamping jaws on the circuit board to etch the circuit board. The time-sharing clamping in which each group of clamping jaws are constantly switched can enable the clamping positions of each group of clamping jaws on the circuit board to be etched.

Description

A printed circuit board etching device

technical field

The invention relates to the technical field of circuit board production equipment, in particular to a printed circuit board etching device.

Background technique

Printed circuit boards in electronic equipment are extremely important components. In order to better process the surface of the circuit board, the circuit board needs to go through many processes in the manufacturing process before the finished product can be prepared. Among them, the etching process of the circuit board is one of the most critical processes in the entire manufacturing process of the circuit board. The main purpose of the etching process is to form conductive lines on the circuit board, that is, after etching the copper clad layer on the circuit board, a number of conductive lines are formed. line.

When etching the circuit board in the existing etching machine, the circuit board is clamped by a clamp and immersed in the etching solution, so that the etching solution can etch the circuit board. During the etching process, the clamped part of the circuit board is blocked by the clamp, and the etching solution cannot etch the part.

Application content

The purpose of the present invention is to provide a printed circuit board etching device, which is provided with multiple groups of clamping jaws and the multiple groups of clamping jaws are controlled separately, so that each group of clamping jaws clamps the circuit board in a time-sharing manner, so that each clamped part of the circuit board is There are times when the clamp is released, so that the moment when the clamped part is released from the clamp can be etched.

Embodiments of the present invention are realized through the following technical solutions:

A printed circuit board etching device, comprising a conveyor belt and a clamping assembly connected to the conveyor belt; the clamping assembly includes a support rod and at least two sets of clamping jaws; one end of the support rod is connected to the conveyor belt , and the other end is connected to the clamping jaws; each group of the clamping jaws is provided with a driving member.

Further, an air inlet duct and an air divider are arranged inside the support rod; the opening of the air inlet duct is arranged on the end face of the support rod connected to one end of the conveyor belt; the printed circuit board etching device A ventilation joint is distributed on the side of the conveyor belt away from the support rod in cooperation with the air inlet duct;

The air distribution element includes a rotating rod and an impeller connected to the rotating rod; the rotating rod is rotatably arranged inside the support rod; the impeller is accommodated in the air inlet duct; the interior of the rotating rod An air outlet channel and an air outlet channel are provided; one end of the air outlet channel is connected to the air inlet channel, and the other end extends to the outer wall of the rotating rod;

The support rod is matched with the air outlet duct to be provided with a plurality of air collecting ducts, so that when the rotating rod rotates, the opening of the air outlet duct on the side of the rotating rod is switched between several air collecting ducts; the The exhaust duct communicates with the outside of the support rod and the outer wall of the rotating rod; when the rotating rod rotates, the opening of the exhaust duct on the side of the rotating rod is switched between several air collecting ducts;

The clamping jaws are pneumatic clamping jaws; each group of the clamping jaws is connected to one of the air collecting ducts.

Further, the air collecting ducts are provided with three; the three air collecting ducts are evenly distributed around the circumference of the rotating rod; the opening of the air outlet duct on the side of the rotating rod and the opening of the exhaust duct on the side of the rotating rod are respectively. It is arranged on the opposite outer two side walls of the rotating rod.

Further, the three air collecting ducts are all provided with pressure relief ports; the three pressure relief ports are communicated through a pressure relief pipe;

The inside of the air inlet duct is provided with a push plate at its opening; the push plate is connected with three connecting rods; the other ends of the three connecting rods all extend to the pressure relief port; each connecting rod is close to the One end of the pressure relief port is equipped with a pressure relief port, and a sealing plug is arranged to seal the pressure relief port; the push plate is also provided with a first elastic member that pushes the sealing plug to block the pressure relief port;

In the printed circuit board etching device, a pusher for pushing the push plate is distributed on the side of the conveyor belt away from the support rod in cooperation with the air inlet duct.

Further, an air outlet is provided on the side of the ventilation joint close to the conveyor belt; a sealing block for blocking the air outlet is arranged inside the ventilation joint; the second elastic part of the tuyere; the sealing block is also provided with an electromagnet;

A magnet is disposed at one end of the support rod close to the conveyor belt; when the magnet is facing the electromagnet, the magnet and the electromagnet repel each other.

Further, a telescopic tube is provided on the outside of the air outlet; the telescopic tube and the sealing block are connected by a scissor-type telescopic piece, so that when the sealing block moves away from the conveyor belt, the telescopic tube is extend toward the conveyor belt.

Further, the conveyor belt includes an upper horizontal section, a lower horizontal section and a vertical section;

The printed circuit board etching device is sequentially provided with a feeding station, an etching station, a feeding station and a liquid removing station along the conveying direction of the conveyor belt; the feeding station and the feeding station are located outside the upper horizontal section; the etching station is located outside the lower horizontal section; the liquid removal station is located outside the vertical section; the loading station, the etching station and the liquid removal station A vent joint is arranged at each position; a pusher is arranged on the blanking station; both the breather joint and the pusher are arranged on the inner side of the conveyor belt.

Further, the liquid removing station is vertically provided with two rows of nozzles; the two rows of nozzles are arranged opposite to each other and the air jet directions are inclined downward; the circuit board can pass between the two rows of the nozzles.

Further, a first airbag and a second airbag are provided in the clamping jaws; tension springs are provided inside the first airbags and the second airbags to make them contract; when gas is introduced into the clamping jaws, the The first air bag and the second air bag are close to each other.

The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

The printed circuit board etching device of the present invention is provided with multiple groups of clamping claws and the multiple groups of clamping claws are controlled separately, so that each group of clamping claws clamps the circuit board in a time-sharing manner. During the etching process, it is only necessary to ensure that a set of clamping jaws are in the clamping state, so that the circuit board can be well clamped. Other gripping components are in a non-clamping state. This makes the clamping positions of the clamping assemblies on the circuit board in an empty state, so that the etchant can enter the clamping positions of the clamping jaws on the circuit board to etch the circuit board. The time-sharing clamping in which each group of clamping jaws are constantly switched can enable the clamping positions of each group of clamping jaws on the circuit board to be etched.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a printed circuit board etching apparatus provided in Embodiment 1 of the present invention;

Fig. 2 is the schematic diagram of the support rod and the ventilation joint;

Figure 3 is a schematic diagram of the cooperation between a support rod and a pusher;

Figure 4 is a schematic diagram of the cooperation between the air outlet duct and the air collecting duct;

Fig. 5 is the schematic diagram of clamping jaws clamping the circuit board;

6 is a schematic diagram of the back of the circuit board when the clamping jaws clamp the circuit board;

FIG. 7 is a structural diagram of the gripper.

Icon: 1-conveyor belt, 2-support rod, 21-air inlet duct, 22-air collecting duct, 221-pressure relief port, 23-magnet, 24-push plate, 25-first elastic piece, 26-connecting rod , 27-Sealing plug, 28-Relief tube, 3-Clamping jaw, 31-First air bag, 32-Second air bag, 33-Extension spring, 4-Vent joint, 41-Sealing block, 42-Second elastic Pieces, 43- Telescopic Tube, 44- Telescopic Piece, 5- Air Distribution Piece, 51- Rod, 511- Air Exhaust Duct, 512- Air Outlet Duct, 52- Impeller, 6- Etched Groove, 7- Push Piece, 8 -Nozzle, 9-Conveyor Roller, 10-Circuit Board.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear ” and other indications are based on the orientation or positional relationship shown in the attached drawings, or the orientation or positional relationship that the application product is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed The connection can also be 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, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

Referring to FIGS. 1-7 , the present invention provides a printed circuit board etching apparatus, which includes a conveyor belt 1 and a clamping assembly connected to the conveyor belt 1 . Etching grooves 6 and conveying rollers 9 are provided along the circumference of the conveying belt 1 . The etching tank 6 is used for placing the etching solution, which is arranged below the conveyor belt 1 . The conveying roller 9 includes an incoming conveying roller 9 and an outgoing conveying roller 9 . When the conveyor belt 1 moves, the clamping assembly moves with the conveyor belt 1 . The clamping assembly clamps the circuit board 10 at the incoming conveying roller 9, and then conveys the circuit board 10 to the etching tank 6 for etching. Finally, the clamping assembly conveys the circuit board 10 to the discharge conveying roller 9 , and then places the circuit board 10 on the discharge conveying roller 9 .

The clamping assembly includes a support rod 2 and at least two sets of clamping jaws 3 . One end of the support rod 2 is connected to the conveyor belt 1 , and the other end is connected to the clamping jaw 3 . Each set of clamping jaws 3 is provided with a driving member.

The printed circuit board etching device of the present invention is provided with multiple groups of clamping jaws 3 and the multiple groups of clamping jaws 3 are controlled separately, so that each group of clamping jaws clamps the circuit board 10 for 3 minutes. During the etching process, it is only necessary to ensure that a set of clamping jaws 3 are in the clamping state, so that the circuit board 10 can be well clamped. Other gripping components are in a non-clamping state. This makes the clamping positions of the clamping assemblies on the circuit board 10 in an empty state, so that the etchant can enter the clamping positions of the clamping jaws 3 on the circuit board 10 to etch the circuit board 10 . The time-sharing clamping in which each group of clamping jaws 3 is constantly switched can enable the clamping positions of each group of clamping jaws 3 on the circuit board 10 to be etched.

In this embodiment, an air inlet duct 21 and an air distribution member 5 are arranged inside the support rod 2 . The opening of the air inlet duct 21 is provided on the end face of one end of the support rod 2 connected to the conveyor belt 1 . The etching device of the printed circuit board 10 is distributed with a ventilation joint 4 on the side of the conveyor belt 1 away from the support rod 2 in cooperation with the air inlet duct 21 . When the strut 2 moves along with the conveyor belt 1 to the point where the opening of the air inlet duct 21 is aligned with the ventilation joint 4 , the ventilation joint 4 passes high-pressure gas into the air inlet duct 21 .

The air distribution member 5 includes a rotating rod 51 and an impeller 52 connected to the rotating rod 51 . The rotating rod 51 is rotatably disposed inside the support rod 2 . A mounting groove may be provided on the bottom end face of the air inlet duct 21 inside the support rod 2 . The size of the installation groove is slightly larger than the outer diameter of the rotating rod 51 . After the rotating rod 51 is installed in the installation groove, the rotating rod 51 can rotate in the installation groove and a good air tightness is maintained between the outer wall of the rotating rod 51 and the groove wall of the installation groove. The impeller 52 is accommodated in the air inlet duct 21 . When the high-pressure airflow is introduced into the air inlet duct 21 , the impeller 52 rotates under the action of the airflow, so that the rotating rod 51 rotates following the impeller 52 .

An air outlet duct 512 and an air exhaust duct 511 are provided inside the rotating rod 51 . The air outlet duct 512 extends from the upper end of the rotating rod 51 to the outer wall of the lower end. The upper end of the air outlet duct 512 is connected to the air inlet duct 21 , and the lower end extends to the outer wall of the rotating rod 51 and forms an opening in the outer wall of the rotating rod 51 .

The support rod 2 is provided with a plurality of air collecting ducts 22 in cooperation with the air outlet duct 512 . Several air collecting ducts 22 are arranged around the rotating rod 51 and two adjacent air collecting ducts 22 are separated by a partition. When the rotating rod 51 rotates, the opening of the air outlet duct 512 on the side of the rotating rod 51 rotates with the rotating rod 51 , and then switches among the plurality of air collecting ducts 22 . When the opening of the air outlet duct 512 on the side of the rotating rod 51 rotates to a certain air collecting duct 22 , the high-pressure gas in the air inlet duct 21 can enter the air inlet duct 21 .

The exhaust duct 511 communicates with the outside of the support rod 2 and the outer wall of the rotating rod 51 . In practice, the air exhaust duct 511 is provided with two openings on the side wall of the rotating rod 51 and the heights of the two openings are different. The height of the opening at the lower end is the same as the height of the opening of the air outlet duct 512 on the side of the rotating rod 51 . That is to say, when the rotating rod 51 is rotated, an opening of the air exhaust duct 511 on the side wall of the rotating rod 51 is also switched among the plurality of air collecting ducts 22 . The support rod 2 is provided with an opening corresponding to the opening of the exhaust duct 511 located at the upper end of the outer wall of the rotating rod 51, so that the opening of the exhaust duct 511 located at the upper end of the outer wall of the rotating rod 51 follows the rotation process of the rotating rod 51, and the opening provided on the support rod 2 is always connected. The opening of the exhaust duct 511 located at the upper end of the outer wall of the rotating rod 51 makes the opening of the exhaust duct 511 located at the upper end of the outer wall of the rotating rod 51 always communicate with the atmosphere. The gripper 3 is a pneumatic gripper 3 . Each set of clamping jaws 3 is connected to an air collecting duct 22 respectively.

When the ventilation joint 4 introduces gas into the air inlet duct 21 , the instantaneous airflow causes the impeller 52 to rotate, thereby making the opening of the air outlet duct 512 rotate and connect to one of the air collecting ducts 22 . At this time, the high-pressure gas in the air inlet duct 21 enters the air collecting duct 22 , so that a set of clamping claws 3 connected to the air collecting duct 22 act to clamp the circuit board 10 . During this process, the opening of the air exhaust duct 511 also rotates and communicates with another air collection duct 22 . Then, the high-pressure gas in the air collecting duct 22 is discharged to the atmosphere through the air exhaust duct 511 , so that the clamping jaws 3 corresponding to the air collecting duct 22 are loosened and the circuit board 10 is released. The rotating rod 51 continues to rotate, and several air collecting ducts 22 are ventilated in sequence. At the same time, several air collecting ducts 22 are also deflated in sequence. This makes the clamping jaws 3 corresponding to the several air collecting ducts 22 open and clamp continuously.

When the strut 2 leaves the ventilation joint 4, the high pressure gas is not introduced into the air inlet duct 21, and the rotating rod 51 stops rotating. At this time, the high-pressure gas in the air collecting duct 22 that is not connected to the air outlet duct 512 and the air exhaust duct 511 is sealed, so as to ensure that the clamping jaws 3 corresponding to the air collecting duct 22 are in a clamped state, so that the circuit board 10 is still in Clamped state.

When high-pressure gas is introduced into the air inlet duct 21 , in order to ensure that the impeller 52 can rotate all the time, a ventilation hole for communicating with the atmosphere is provided at the bottom of the air inlet duct 21 . The impeller 52 is located between the opening of the air inlet duct 21 and the ventilation hole. Therefore, when the high-pressure gas is introduced into the air inlet duct 21, there is always an airflow in the air inlet duct 21, thereby ensuring that the impeller 52 can rotate. In addition, the rotation speed of the rotating rod 51 can also be controlled by controlling the high-pressure gas introduced into the air inlet duct 21 during use. For example, gas is introduced into the air inlet duct 21 for 1 s and then gas is introduced into the air inlet duct 21 at intervals of 1 s. Sequentially circulating ventilation can make the rotating rod 51 rotate intermittently, thereby controlling the switching frequency of clamping and releasing of the clamping jaws 3 .

In this embodiment, there are three air collecting ducts 22 . The three air collecting ducts 22 are evenly distributed around the circumference of the rotating rod 51 . The opening of the air outlet duct 512 on the side of the rotating rod 51 and the opening of the air exhaust duct 511 on the side of the rotating rod 51 are respectively disposed on the opposite outer two side walls of the rotating rod 51 .

After the rotating rod 51 is rotated and stopped, the air outlet duct 512 and the air exhaust duct 511 can only correspond to one air collecting duct 22 each. This ensures that there is always one air collecting duct 22 filled with high-pressure gas, thereby ensuring that the circuit board 10 can be clamped.

In this embodiment, the three air collecting ducts 22 are all provided with pressure relief ports 221 . The three pressure relief ports 221 are communicated through the pressure relief pipe 28 .

A push plate 24 is disposed at the opening of the air inlet duct 21 . The push plate 24 is connected with three connecting rods 26 . The other ends of the three connecting rods 26 all extend to the pressure relief port 221 . One end of each connecting rod 26 close to the pressure relief port 221 is provided with a pressure relief port 221 and a sealing plug 27 corresponding to a pressure relief port 221 . The push plate 24 is also provided with a first elastic member 25 that pushes the sealing plug 27 to block the pressure relief port 221 . When the push plate 24 is moved, the first elastic member 25 is deformed to store energy. At the same time, the three connecting rods 26 move under the push of the push plate 24 , so that the three sealing plugs 27 open the three pressure relief ports 221 . At this time, the three air collection chambers are connected, and the airtight high-pressure gas in the air collection duct 22 that is not connected to the air outlet duct 512 and the air exhaust duct 511 is discharged through the other two air collection chambers, so that all the clamping jaws 3 are in The relaxed state, in turn, facilitates the removal of the circuit board 10 from the clamping assembly.

In the printed circuit board etching device, a pushing member 7 for pushing the push plate 24 is distributed on the side of the conveyor belt 1 away from the support rod 2 in cooperation with the air inlet duct 21 . The pushing member 7 may be a pushing member such as a cylinder. The push plate 24 can be pushed by the action of the pusher 7 , thereby releasing the gas in all the air collecting ducts 22 . After the pushing member 7 is withdrawn, the pushing plate 24 moves under the maximum use of the elastic force of the first elastic member 25 , so that the three sealing plugs 27 seal the three pressure relief ports 221 .

In this embodiment, an air outlet is provided on the side of the ventilation joint 4 close to the conveyor belt 1 . A sealing block 41 for blocking the air outlet is provided inside the ventilation joint 4 . The sealing block 41 is provided with a second elastic member 42 that pushes it to block the air outlet. The sealing block 41 is also provided with an electromagnet. A magnet 23 is provided at one end of the support rod 2 close to the conveyor belt 1 . When the magnet 23 is facing the electromagnet, the magnet 23 and the electromagnet repel each other.

When the support rod 2 moves along with the conveyor belt 1 to align with the vent joint 4 , the sealing block 41 compresses the second elastic member 42 under the force of the magnet 23 and the electromagnet, so that the air outlet is opened. At this time, the high-pressure gas in the ventilation joint 4 can enter the air inlet duct 21 . After the strut 2 leaves the vent joint 4 , the sealing block 41 blocks the air outlet under the action of the second elastic member 42 . This enables the on-off of the air flow of the vent joint 4 to be automatically controlled. At the same time, when intermittent gas supply is required, it can be realized by controlling the intermittent energization of the electromagnet.

In this embodiment, a telescopic tube 43 is provided outside the air outlet. The telescopic tube 43 and the sealing block 41 are connected by a scissor-type telescopic piece 44 . When the sealing block 41 moves away from the conveyor belt 1 , the telescopic tube 43 extends toward the conveyor belt 1 . At the same time, during the process of sealing the air outlet by the sealing block 41, the telescopic tube 43 is automatically retracted.

In this embodiment, the conveyor belt 1 includes an upper horizontal section, a lower horizontal section and a vertical section. The printed circuit board etching device is sequentially provided with a feeding station, an etching station, a feeding station and a liquid removing station along the conveying direction of the conveyor belt 1 . Both the loading station and the unloading station are located outside the upper horizontal section. The etching station is located outside the lower horizontal section. The liquid removal station is located outside the vertical section. The feeding station, the etching station and the liquid removal station are all provided with ventilation joints 4 . The blanking station is provided with a pusher 7 . Both the vent joint 4 and the pusher 7 are arranged on the inner side of the conveyor belt 1 . The etching groove 6 is arranged below the etching station.

When the conveyor belt 1 rotates, the support rod 2 rotates along with it. When the support rod 2 moves to the feeding station, the ventilation joint 4 of the feeding station is automatically opened and ventilated to the air inlet duct 21 , so that the clamping jaw 3 clamps the circuit board 10 . When the support rod 2 is moved to the etching station, the ventilation joint 4 of the etching station is opened, so that the clamping jaws can be clamped for 3 minutes, so that the etching solution can etch each part of the circuit board 10 . At the same time, the continuous switching of opening and clamping of the plurality of clamping jaws 3 also makes the etching solution around the clamping jaws 3 flow, so that the etching solution can better contact the circuit board 10 . When the support rod 2 is moved to the unloading station, the pusher 7 of the unloading station pushes the push plate 24, thereby releasing the gas in all the gas collection chambers, so that all the clamping jaws 3 release the circuit board 10, and then the circuit board is released. 10 put down.

In this embodiment, two rows of nozzles 8 are vertically arranged at the liquid removal station. The two rows of nozzles 8 are arranged opposite to each other and the air jet directions are inclined downward. The circuit board 10 can pass between the two rows of nozzles 8 . When the strut 2 moves to the liquid removal station, the vent joint 4 of the liquid removal station is opened, so that the multiple sets of clamping jaws are clamped for 3 minutes, so that the gas ejected from the nozzle 8 can be sprayed to each part of the circuit board 10 . Furthermore, the etching solution remaining on the circuit board 10 is completely cleaned.

In this embodiment, the clamping jaw 3 is provided with a first air bag 31 and a second air bag 32 . Tension springs 33 are provided inside the first air bag 31 and the second air bag 32 to contract them. When gas is introduced into the clamping jaws 3 , the first airbag 31 and the second airbag 32 are protruding close to each other, thereby clamping the circuit board 10 between the first airbag 31 and the second airbag 32 . When the air collecting channel 22 corresponding to the clamping jaw 3 is connected to the atmosphere, the first air bag 31 and the second air bag 32 are retracted under the action of the respective tension springs 33 , thereby exposing the clamped part of the circuit board 10 .

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A printed circuit board etching device, characterized in that it comprises a conveyor belt (1) and a clamping assembly connected to the conveyor belt (1); the clamping assembly comprises a support rod (2) and at least two A set of clamping jaws (3); one end of the support rod (2) is connected to the conveyor belt (1), and the other end is connected to the clamping jaws (3); each group of the clamping jaws (3) is provided with a drive pieces. 2. The printed circuit board etching device according to claim 1, characterized in that: an air inlet duct (21) and an air divider (5) are arranged inside the support rod (2); 21) The opening is provided on the end face of the support rod (2) connected to one end of the conveyor belt (1); the printed circuit board etching device is located on the conveyor belt (1) away from the support rod (2). One side of the ) cooperates with the air inlet duct (21) and is distributed with a ventilation joint (4); The air distribution member (5) comprises a rotating rod (51) and an impeller (52) connected to the rotating rod (51); the rotating rod (51) is rotatably arranged inside the support rod (2) ; the impeller (52) is accommodated in the air inlet duct (21); the interior of the rotating rod (51) is provided with an air outlet duct (512) and an air exhaust duct (511); the air outlet duct (512) ) is connected to the air inlet duct (21) at one end, and the other end extends to the outer wall of the rotating rod (51); A plurality of air collecting ducts (22) are arranged on the support rod (2) in cooperation with the air outlet duct (512), so that when the rotating rod (51) is rotated, the air outlet duct (512) will be in the rotating direction. The opening on the side of the rod (51) is switched between several air collecting ducts (22); the air exhaust duct (511) communicates with the outside of the support rod (2) and the outer wall of the rotating rod (51); the rotating rod (51) When rotating, the opening of the exhaust duct (511) on the side of the rotating rod (51) is switched between a plurality of air collecting ducts (22); The clamping jaws (3) are pneumatic clamping jaws (3); each group of the clamping jaws (3) is connected to one of the air collecting ducts (22). 3. The printed circuit board etching device according to claim 2, characterized in that: the air collecting ducts (22) are provided with three; the three air collecting ducts (22) surround the rotating rod (51) The openings of the air outlet duct (512) on the side of the rotating rod (51) and the opening of the exhaust duct (511) on the side of the rotating rod (51) are respectively arranged on the opposite outer sides of the rotating rod (51). Both side walls. 4. The printed circuit board etching device according to claim 3, wherein the three air collecting ducts (22) are provided with pressure relief ports (221); The pressure pipe (28) is connected; A push plate (24) is arranged inside the air inlet duct (21) at its opening; the push plate (24) is connected with three connecting rods (26); the other ends of the three connecting rods (26) all extend to the pressure relief port (221); one end of each connecting rod (26) close to the pressure relief port (221) is fitted with one of the pressure relief ports (221) and is provided with a pressure relief port for sealing the pressure relief port (221). (221) a sealing plug (27); the push plate (24) is further provided with a first elastic member (25) that pushes the sealing plug (27) to block the pressure relief port (221); In the printed circuit board etching device, a pushing member ( 7). 5. The printed circuit board etching device according to claim 4, characterized in that: an air outlet is provided on the side of the ventilation joint (4) close to the conveyor belt (1); the ventilation joint (4) A sealing block (41) for blocking the air outlet is provided inside; the sealing block (41) is provided with a second elastic member (42) that pushes it to block the air outlet; the sealing block (41) is further provided with an electromagnet; A magnet (23) is provided at one end of the support rod (2) close to the conveyor belt (1); when the magnet (23) faces the electromagnet, the magnet (23) and the electromagnet repel each other. 6. The printed circuit board etching device according to claim 5, characterized in that: a telescopic tube (43) is provided outside the air outlet; between the telescopic tube (43) and the sealing block (41) Connected by a scissor-type telescopic piece (44), when the sealing block (41) moves away from the conveyor belt (1), the telescopic tube (43) extends toward the conveyor belt (1). 7. The printed circuit board etching device according to claim 6, wherein the conveyor belt (1) comprises an upper horizontal section, a lower horizontal section and a vertical section; The printed circuit board etching device is sequentially provided with a feeding station, an etching station, a feeding station and a liquid removing station along the conveying direction of the conveyor belt (1); the feeding station and the feeding station The stations are located outside the upper horizontal section; the etching station is located outside the lower horizontal section; the liquid removal station is located outside the vertical section; the loading station, the etching station and the removal station The liquid stations are provided with ventilation joints (4); the blanking stations are provided with push pieces (7); inside. 8. The printed circuit board etching device according to claim 7, characterized in that: the liquid removal station is vertically provided with two rows of nozzles (8); downward; the circuit board (10) can pass between the two columns of the nozzles (8). 9 . The printed circuit board etching device according to claim 2 , wherein: the clamping jaw ( 3 ) is provided with a first air bag ( 31 ) and a second air bag ( 32 ); the first air bag ( 31 ) ) and the second air bag (32) are provided with a tension spring (33) to make them contract; when gas is introduced into the clamping jaw (3), the first air bag (31) and the second air bag (32) ) close to each other.

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