Solder paste printing machine capable of accurately feeding board

Abstract

The utility model provides a solder paste printing machine capable of accurately feeding a board, which comprises a printing device arranged on the upper side and a lifting deviation rectifying platform arranged on the lower side of the printing device, and an automatic accurate board feeding device and a board discharging conveying device are respectively arranged on two sides of the lifting deviation rectifying platform. The automatic precise plate feeding device comprises an electric sliding rail and a plate storage box arranged on the upper side of the electric sliding rail, a plate pushing block is arranged on the electric sliding rail, a plate outlet is formed in the side, close to the lifting deviation rectifying platform, of the plate storage box, a sliding inlet and outlet is formed in the side, away from the lifting deviation rectifying platform, of the plate storage box, and the plate pushing block can penetrate through the sliding inlet and outlet and the plate outlet. The conveying device has the advantages that the electric sliding rail is matched with the plate pushing block, the technical problem that an existing conveying device of the solder paste printing machine cannot conduct accurate positioning is solved, and PCBs in the plate storage box can be sequentially and accurately conveyed to the lifting deviation rectifying platform to be subjected to solder paste printing.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board production equipment, in particular to a solder paste printer with precise board feeding. Background Art

[0002] The solder paste printing equipment is one of the key equipment in the surface mount technology (SMT) production line and is the first process in the production process flow [1]. The quality of its printing result directly affects the subsequent process flow and even the product quality.

[0003] At present, the solder paste printers on the market mainly consist of a lifting mechanism, a printed circuit board alignment correction platform, a vision system, a squeegee, and a frame, etc. The specific working steps are as follows: 1) After the PCB board enters the solder paste printer through the transmission system, it is roughly positioned by the positioning pins and clamped by the clamping device; 2) The vision system sequentially sends feedback signals according to the position deviation on the PCB board and the template, and adjusts the alignment correction platform until the PCB board and the template are aligned; 3) The lifting mechanism raises the platform to the printing position and presses it tightly against the template; 4) The squeegee on the programmable squeegee head moves back and forth on the template to evenly print the solder paste on the corresponding pads of the PCB board; 5) The lifting mechanism descends, the PCB board fixing subsystem relaxes, and the PCB board is sent to the next process by the conveyor belt to complete a working cycle.

[0004] Among them, because the transmission system adopted by the solder paste printer is usually a conveyor belt or a timing belt, that is, it cannot be positioned, so it is necessary to use positioning pins for positioning. However, the positioning of the positioning pins is a rough positioning, that is, it cannot be accurately positioned, which will also lead to a large adjustment amount of the subsequent vision system and the alignment correction platform. Summary of the Utility Model

[0005] Aiming at the deficiencies in the prior art, the utility model provides a solder paste printer with precise board feeding, which solves the technical problem that the transmission device of the existing solder paste printer cannot be accurately positioned.

[0006] A solder paste printer with precise board feeding according to the embodiment of the utility model includes a printing device arranged on the upper side and a lifting and alignment correction platform arranged under the printing device. Automatic precise board feeding devices and board discharging conveyor devices are respectively arranged on both sides of the lifting and alignment correction platform;

[0007] The automatic precise board feeding device includes an electric slide rail and a board storage box arranged on the upper side of the electric slide rail. A pushing plate is arranged on the electric slide rail. An outlet is arranged on one side of the board storage box close to the lifting and alignment correction platform, and a sliding inlet and outlet is arranged on the side of the board storage box far from the lifting and alignment correction platform. The pushing plate can pass through the sliding inlet and outlet and the outlet.

[0008] The technical principle of the present utility model is as follows: The electric slide rail has high precision and can be precisely positioned in cooperation with the control system. Therefore, the pushing plate is arranged on the electric slide rail to push the PCB board placed in the storage board box onto the lifting and deviation-correcting platform. Since the movement position of the electric slide rail is precisely controllable, the PCB board can be precisely pushed directly below the template of the printing device without a positioning pin. The vision system of the printing device cooperates with the lifting and deviation-correcting platform to confirm whether it is aligned. If not, fine adjustment is carried out again.

[0009] Meanwhile, the board outlet is used for the PCB boards in the storage board box to be sequentially conveyed onto the lifting and deviation-correcting platform, while the sliding inlet and outlet are used for the movement of the pushing plate.

[0010] Compared with the prior art, the present utility model has the following beneficial effects: By means of the electric slide rail cooperating with the pushing plate, it solves the technical problem that the transmission device of the existing solder paste printer cannot perform precise positioning, enabling the PCB boards in the storage board box to be precisely conveyed onto the lifting and deviation-correcting platform for solder paste printing in sequence.

[0011] Further, a tilting piece is provided on the side of the pushing plate away from the lifting and deviation-correcting platform, and the lowest point of the tilting piece is lower than the upper surface of the electric slide rail.

[0012] Further, the pushing plate is installed on the slider of the electric slide rail, and there are two pushing plates. Two sliding grooves are provided on the upper surface of the electric slide rail, and the two pushing plates slide along the two sliding grooves respectively.

[0013] Further, a pushing arm is provided on the side of the pushing plate close to the lifting and deviation-correcting platform. The bottom surface of the pushing arm is flush with the upper surface of the electric slide rail and the upper surface of the lifting and deviation-correcting platform, and the top surface of the pushing arm is flush with the highest point of the tilting piece.

[0014] Further, an opening is provided at the top of the storage board box.

[0015] Further, negative pressure holes are evenly distributed on the lifting and deviation-correcting platform, and all the negative pressure holes are connected to a negative pressure system.

[0016] Further, the board outlet conveying device is of a conveyor belt structure. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the solder paste printer according to an embodiment of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the automatic precise board feeding device according to an embodiment of the present utility model.

[0019] Figure 3 It is a sectional view of the automatic precise board feeding device according to an embodiment of the present utility model.

[0020] Figure 4 Schematic diagram of the pushing plate structure according to an embodiment of the present utility model.

[0021] Figure 5 Schematic diagram of the position before the automatic and precise board feeding device according to an embodiment of the present utility model pushes out the PCB board.

[0022] Figure 6 Schematic diagram of the position after the automatic and precise board feeding device according to an embodiment of the present utility model pushes out the PCB board.

[0023] Figure 7 Top view of the lifting and deviation correcting platform according to an embodiment of the present utility model.

[0024] In the above-mentioned drawings: 100, printing device; 110, lifting and deviation correcting platform; 111, board discharging conveyor device; 112, automatic and precise board feeding device; 120, negative pressure system; 121, negative pressure holes; 200, electric slide rail; 201, slider; 202, sliding groove; 210, pushing plate; 211, inclined piece; 212, pushing arm; 300, board storage box; 310, board discharging opening; 320, sliding inlet and outlet; 330, opening; 400, PCB board. Detailed implementation manners

[0025] The technical solutions in the present utility model will be further described below in conjunction with the drawings and embodiments.

[0026] As Figure 1 shown, the solder paste printing machine for precise board feeding includes a printing device 100 arranged on the upper side and a lifting and deviation correcting platform 110 arranged under the printing device 100. Specifically, the printing device 100 here includes a vision system, a squeegee, a frame, etc. mentioned in the background art, and the lifting and deviation correcting platform 110 is a lifting mechanism and a printed circuit board deviation correcting platform.

[0027] As Figure 1 shown, an automatic and precise board feeding device 112 and a board discharging conveyor device 111 are respectively arranged on both sides of the lifting and deviation correcting platform 110. Among them, the board discharging conveyor device 111 is of a conveyor belt structure and is used to convey the PCB board 400 that has completed solder paste printing out of the solder paste printing machine.

[0028] Specifically, as Figures 2 - 4 shown, the automatic and precise board feeding device 112 includes an electric slide rail 200 and a board storage box 300 arranged on the upper side of the electric slide rail 200. A pushing plate 210 is arranged on the electric slide rail 200. A board discharging opening 310 is arranged on one side of the board storage box 300 close to the lifting and deviation correcting platform 110, and a sliding inlet and outlet 320 is arranged on the side of the board storage box 300 far from the lifting and deviation correcting platform 110. The pushing plate 210 can pass through the sliding inlet and outlet 320 and the board discharging opening 310.

[0029] The specific pushing plate 210 is installed on the slider 201 of the electric slide rail 200, and there are two pushing plates 210, both of which are installed on the slider 201 of the electric slide rail 200. There are two sliding grooves 202 on the upper surface of the electric slide rail 200, and the two pushing plates 210 slide along the two sliding grooves 202 respectively. That is, when the pushing plate 210 is not in the storage box 300, the bottommost PCB board 400 in the storage box 300 is in contact with the electric slide rail 200.

[0030] As Figure 2 , 4 shown, a tilt piece 211 is welded on the side of the pushing plate 210 away from the lifting and rectifying platform 110. The lowest point of the tilt piece 211 is lower than the upper surface of the electric slide rail 200, so that the pushing plate 210 can gradually lift the bottommost PCB board 400 in the storage box 300 when retracting. A pushing arm 212 is integrally formed on the side of the pushing plate 210 close to the lifting and rectifying platform 110. The bottom surface of the pushing arm 212 is flush with the upper surface of the electric slide rail 200 and the upper surface of the lifting and rectifying platform 110, so as to ensure that the pushing arm 212 can push the PCB board 400 on the upper surface of the electric slide rail 200 flat onto the lifting and rectifying platform 110. The top surface of the pushing arm 212 is flush with the highest point of the tilt piece 211, in order to ensure that the lifted PCB board 400 can smoothly transition to the upper side of the pushing arm 212 when retracting.

[0031] Before the pushing plate 210 pushes out the PCB board 400, it is on the side of the storage box 300 away from the lifting and rectifying platform 110, specifically as Figure 5 shown; then the electric slide rail 200 drives the pushing plate 210 and the PCB board 400 to move towards the lifting and rectifying platform 110 until the PCB board 400 moves to the lifting and rectifying platform 110, as Figure 6 shown; then the electric slide rail 200 drives the pushing plate 210 to move towards the side away from the lifting and rectifying platform 110. During the movement, the tilt piece 211 lifts the bottommost PCB board 400 in the storage box 300, as Figure 2 shown; continue to move until the pushing arm 212 returns to the Figure 5 shown position, and the bottommost PCB board 400 falls back onto the upper surface of the electric slide rail 200.

[0032] As Figure 2 shown, an opening 330 is provided at the top of the storage box 300 for manually stacking and placing new PCB boards 400.

[0033] As Figure 1 , 7 shown, negative pressure holes 121 are evenly distributed on the lifting and rectifying platform 110. All the negative pressure holes 121 are connected to a negative pressure system 120. Specifically, the negative pressure system 120 includes an air pump and pipelines, and a negative pressure is formed at the negative pressure holes 121 through the air pump, so as to ensure the fixation of the PCB board 400.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A solder paste printer with precise board feeding, characterized by: It includes a printing device arranged on the upper side and a lifting and correcting platform arranged on the lower side of the printing device, and an automatic precise board feeding device and a board out conveying device are respectively arranged on both sides of the lifting and correcting platform; The automatic precise board feeding device includes an electric slide rail and a board storage box arranged on the upper side of the electric slide rail, a pushing plate block is provided on the electric slide rail, a board outlet is provided on the side of the board storage box close to the lifting and correcting platform, and a sliding inlet and outlet is provided on the side of the board storage box away from the lifting and correcting platform, and the pushing plate block can pass through the sliding inlet and outlet and the board outlet.

2. The precise board-feeding solder paste printer according to claim 1, characterized in that: A tilting piece is provided on the side of the pushing plate away from the lifting and deviation correcting platform, and the lowest point of the tilting piece is lower than the upper surface of the electric slide rail.

3. The precise board-feeding solder paste printer according to claim 2, characterized in that: The push plate is installed on the slider of the electric slide rail, and there are two push plates. Two sliding grooves are arranged on the upper surface of the electric slide rail, and the two push plates slide along the two sliding grooves respectively.

4. The solder paste printer with precise board feeding as claimed in claim 2, characterized in that: A push arm is provided on one side of the push plate close to the lifting and correcting platform, the bottom surface of the push arm is flush with the upper surface of the electric slide rail and the upper surface of the lifting and correcting platform, and the top surface of the push arm is flush with the highest point of the inclined plate.

5. The precise board-feeding solder paste printer according to claim 1, characterized in that: The top of the board storage box is provided with an opening.

6. The precise board-feeding solder paste printer according to claim 1, characterized in that: Negative pressure holes are evenly distributed on the lifting and correcting platform, and all the negative pressure holes are connected to a negative pressure system.

7. The precise board-feeding solder paste printer according to claim 1, characterized in that: The plate discharging conveying device is a conveyor belt structure.

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