CN-122028319-A - PCB (printed circuit board) pickling equipment

CN122028319ACN 122028319 ACN122028319 ACN 122028319ACN-122028319-A

Abstract

The invention relates to the technical field of circuit board pickling, in particular to PCB pickling equipment, which comprises a cleaning box, wherein a pick-and-place opening is formed in the front side of the cleaning box, an upper cavity and a lower cavity are formed in the inner part of the cleaning box, sliding holes are formed in the side walls of the cleaning box, corresponding to a bearing mechanism, and are used for providing a closed operation space and moving guidance, and the bearing mechanism can vertically move along the sliding holes and is used for bearing a PCB and driving the PCB to be switched between the upper cavity and the lower cavity so as to adapt to different working procedure positions. According to the invention, inert gas sprayed out of the inclined nozzle directly washes acid washing impurities adhered to the surface of the PCB, so that stubborn dirt is quickly stripped, and the influence of impurity residues on processing precision is avoided, on the other hand, the gas diffuses and rises in the acid liquor to form a stirring effect, so that the local concentration difference of the acid liquor is broken, the acid liquor is fully contacted with the surface of the PCB, the acid liquor utilization rate is obviously improved, and the acid liquor replacement frequency and resource loss are reduced.

Inventors

LIU TENG
LU DAWEI
LIU MINGZHONG
PAN RENGUO
FANG CHANG
HUANG HAI

Assignees

安徽展邦电子科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260203

Claims (10)

1. A PCB circuit board pickling apparatus, comprising: The cleaning box is provided with a picking and placing opening at the front side, the inner part is an upper cavity and a lower cavity, and the side wall is provided with a sliding hole corresponding to the bearing mechanism and used for providing a closed operation space and moving guidance; The bearing mechanism can vertically move along the sliding hole and is used for bearing the PCB and driving the PCB to switch between the upper cavity and the lower cavity so as to adapt to different working procedure positions; the pressing mechanism is arranged corresponding to the bearing mechanism and used for clamping and fixing the PCB in a matched manner with the bearing mechanism, so that the PCB is ensured to be stably installed in each working procedure; the multi-medium cleaning mechanism is assembled at the top of the pressing mechanism, and can be switched to introduce inert gas, clean water and heat the inert gas, so that the functions of pickling reinforcement, residual acid flushing and water stain drying are respectively realized; The auxiliary sealing guide mechanism is linked with the bearing mechanism, sealing splash prevention is realized during pickling, directional guide pollution prevention is realized during cleaning, and all the mechanisms cooperatively form an integrated closed-loop structure.
2. The pickling equipment for the PCB is characterized in that the supporting mechanism comprises an L-shaped supporting plate, an electric push rod and an extension rod, wherein the L-shaped supporting plate comprises a horizontal section and a vertical section, long grooves are formed in two sides of the horizontal section, a plug-in type filter screen is assembled at the bottom of the horizontal section, the horizontal section is of an inclined structure with one side close to a pick-and-place opening being low, the electric push rod is fixed on the surface of a cleaning box, the output end of the electric push rod is connected with the L-shaped supporting plate through the extension rod, and the extension rod penetrates into the sliding hole and drives the L-shaped supporting plate to move stably and vertically.
3. The pickling equipment for the PCB is characterized in that the pressing mechanism comprises a pressing plate, a sliding block, a screw rod, a first spring and a sliding groove, the sliding groove is formed in the inner side of the vertical section of the L-shaped supporting plate, the sliding block is embedded in the sliding groove and forms sliding fit, the bottom end of the screw rod is rotationally connected with the sliding block, upward threads penetrate through the top of the sliding groove, the sliding block and the connected pressing plate can be driven to adjust the height by rotating the screw rod, clamping grooves are formed in the bottom of the pressing plate and the top of the horizontal section of the L-shaped supporting plate, the first spring is arranged between the sliding block and the pressing plate, and elastic clamping force is provided for adapting to PCB with different thicknesses, and meanwhile damage to the PCB body is avoided.
4. The pickling equipment for the PCB is characterized in that when pickling is performed, the L-shaped supporting plate drives the PCB to move downwards to the lower cavity, the screw rod is rotated to enable the pressing plate to be attached to the top of the PCB, the PCB is clamped through the clamping groove in a matched mode, the pressing plate and the vertical section of the L-shaped supporting plate are matched and sealed at the top of the working space, the long groove is used for enabling acid cleaning liquid in the lower cavity to circulate, and the plug-in type filter screen intercepts impurities generated in the pickling process.
5. The pickling equipment for the PCB circuit board according to claim 1, wherein the auxiliary sealing flow guiding mechanism comprises a sliding plate, a connecting block and a second spring, wherein a vertical groove is formed in the inner wall of the upper chamber corresponding to the sliding plate, the sliding plate is embedded in the vertical groove through the connecting block and forms sliding fit, two ends of the second spring are respectively connected with the connecting block and the top of the vertical groove, the L-shaped supporting plate moves upwards to push the sliding plate to synchronously lift during cleaning, the connecting block compresses the second spring, and the sliding plate seals a long groove of the horizontal section of the L-shaped supporting plate to prevent sewage from flowing into the lower chamber.
6. The pickling equipment for the PCB circuit board according to claim 2, wherein a convex edge is arranged on one side of the horizontal section of the L-shaped supporting plate, which is close to the picking and placing port, the L-shaped supporting plate moves upwards to a preset position during cleaning, the convex edge is attached to a convex edge below the picking and placing port of the cleaning box to form front side sealing, a liquid draining groove is arranged at the picking and placing port, sewage is guided to the picking and placing port by the inclined horizontal section, and the sewage is discharged to an external collecting device through the liquid draining groove.
7. The pickling equipment for the PCB circuit board according to claim 2, wherein the opening and closing box cover is arranged at the position of the taking and placing opening of the cleaning box, a sealing rubber ring is arranged at the joint position of the box cover and the cleaning box, and the opening and placing opening are sealed after the box cover is closed, so that acid mist and sewage are prevented from leaking.
8. The pickling equipment for the PCB is characterized in that the multi-medium cleaning mechanism comprises a three-way connector, a transverse pipe, a vertical pipe, a horizontal pipe, an electric telescopic rod and a hose, wherein the three-way connector is connected with an external inert gas source, a clean water source and a heating inert gas source, the transverse pipe, the vertical pipe and the horizontal pipe are sequentially communicated, two sides of the horizontal pipe are provided with strip-shaped nozzles which are obliquely aligned with the PCB, the electric telescopic rod drives a pipeline to vertically move, the hose is connected with the three-way connector and the transverse pipe, and the electric telescopic rod is adapted to move and ensure no leakage of medium transportation.
9. The pickling equipment for the PCB is characterized in that a mounting hole is formed in the surface of the pressing plate, an exhaust valve is assembled in the mounting hole, and when the multi-medium cleaning mechanism is filled with inert gas to clean the PCB, the exhaust valve can adjust the internal and external air pressure of the working space in real time to realize pressure balance and avoid leakage of a sealing structure or damage of the PCB caused by overhigh air pressure.
10. The pickling equipment for the PCB according to claim 2, wherein the side wall of the lower chamber corresponding to the cleaning box is provided with an acid cleaning solution filling port and a liquid draining port with a valve.

Description

PCB (printed circuit board) pickling equipment Technical Field The invention relates to the technical field of circuit board pickling, in particular to PCB pickling equipment. Background In the production and processing of a PCB, an acid washing process is a key link for removing an oxide layer and impurities on the surface of the PCB, and the conductivity and the processing precision of the PCB are directly affected. At present, the existing pickling equipment has structural design defects generally, and machining efficiency, precision and environmental protection are difficult to consider. Most equipment adopts single cavity structure, and pickling, washing, stoving process need step by step independently go on, need the manual work frequently to shift the PCB board, not only lead to the process to link up inefficiency, lengthen whole processing cycle, still easily cause plate body secondary pollution, scratch or collide with the damage in the transfer process, and the easy seepage of acidizing fluid causes the potential safety hazard. Meanwhile, the conventional equipment is mostly dependent on a natural acid liquid soaking mode in the acid washing stage, the acid liquid is unevenly contacted with the surface of the PCB, local concentration difference is easy to form, the acid liquid utilization rate is low, the processing consumable cost is increased, impurities peeled off the surface of the board are easy to adhere and remain, manual cleaning is required to be additionally input, and the labor cost is further increased. Disclosure of Invention The invention aims to provide a PCB (printed circuit board) pickling device, which solves the problems of low process connection efficiency, easiness in damaging a plate body, poor acid liquor utilization rate, complex cleaning of impurity residues, redundant sealing and diversion structures and inconvenience in maintenance of the conventional pickling device. In order to achieve the above purpose, the present invention adopts the following technical scheme: A pickling device for PCB circuit boards comprises a cleaning box, a picking and placing port arranged on the front side, a sliding hole formed in the inner portion of the cleaning box, an upper cavity and a lower cavity, sliding holes formed in the side wall of the cleaning box and corresponding to a supporting mechanism, a supporting mechanism capable of vertically moving along the sliding hole and used for carrying the PCB boards and driving the PCB boards to switch between the upper cavity and the lower cavity and adapting to different working procedure positions, a pressing mechanism arranged corresponding to the supporting mechanism and used for clamping and fixing the PCB boards in a matched mode with the supporting mechanism to ensure that the PCB boards are stably installed in each working procedure, a multi-medium cleaning mechanism arranged on the top of the pressing mechanism and capable of being switched to be filled with inert gas, clean water and heated inert gas to achieve pickling strengthening, residual acid flushing and water stain drying functions respectively, an auxiliary sealing and guiding mechanism linked with the supporting mechanism to achieve sealing and splash prevention during pickling, and achieve directional guiding and pollution prevention during cleaning, and all the mechanisms cooperatively form an integrated closed loop structure. The bearing mechanism comprises an L-shaped supporting plate, an electric push rod and an extension rod, wherein the L-shaped supporting plate comprises a horizontal section and a vertical section, long grooves are formed in two sides of the horizontal section, a plug-in type filter screen is arranged at the bottom of the horizontal section, the horizontal section is of an inclined structure with one side close to a taking and placing port being lower, the electric push rod is fixed on the surface of a cleaning box, the output end of the electric push rod is connected with the L-shaped supporting plate through the extension rod, and the extension rod penetrates through the sliding hole and drives the L-shaped supporting plate to move stably and vertically. The pressing mechanism comprises a pressing plate, a sliding block, a screw rod, a first spring and a sliding groove, wherein the sliding groove is arranged on the inner side of a vertical section of the L-shaped supporting plate, the sliding block is embedded in the sliding groove and forms sliding fit, the bottom end of the screw rod is rotationally connected with the sliding block, upward threads penetrate through the top of the sliding groove, the sliding block and the connected pressing plate can be driven to adjust the height by rotating the screw rod, clamping grooves are formed in the bottom of the pressing plate and the top of a horizontal section of the L-shaped supporting plate, the first spring is arranged between the sliding block and the pressing plate, elastic clamping force is pr