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CN-224222225-U - Improve poor manufacturing installation of copper sheet separation behind PCB slotted hole tin spraying

CN224222225UCN 224222225 UCN224222225 UCN 224222225UCN-224222225-U

Abstract

The utility model provides a device for improving poor copper sheet separation after PCB slot tin spraying, which relates to the technical field of PCB manufacture and comprises a cleaning kettle, wherein a square hole is formed in the top of the cleaning kettle, a kettle cover is covered on the top of the cleaning kettle, a CO2 inlet pipe and a methanol inlet pipe are fixedly and communicated with the top of the kettle cover, a high-precision metering pump is arranged on the methanol inlet pipe, and a pumping pipe is fixedly and communicated with the surface of the cleaning kettle close to the top. In the utility model, the supercritical CO2 has both gas diffusivity and liquid solubility, and can penetrate into the slot holes of the PCB by matching with the cross cavity and the screen plate structure in the device, thereby thoroughly removing residues in the slot holes. Meanwhile, through dynamically adjusting the cleaning parameters, the cleaning process can be optimized according to the characteristics (such as high density and high thickness-diameter ratio) of different slotted holes, the copper sheet separation defective rate can be reduced, the cleaning process has no strong mechanical impact and no harmful residues, the damage of a PCB is avoided, and the electrical performance and the stability of a product are ensured.

Inventors

  • ZHANG TONGGUANG
  • OUYANG XIAOJUN
  • ZHANG XIANLU
  • ZHOU YINGCHUN
  • WANG YUXIANG
  • JIA YIHU

Assignees

  • 吉安满坤科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250719

Claims (7)

  1. 1. The utility model provides an improve poor manufacturing installation of copper sheet separation behind PCB slotted hole tin spraying, includes washery (1), its characterized in that square hole (6) have been seted up at the top of washery (1), the top of washery (1) is covered with cauldron lid (7), the top of cauldron lid (7) is fixed and is linked together and advance CO 2 pipe (8) and advance methyl alcohol pipe (9), advance to install high accuracy measuring pump (10) on methyl alcohol pipe (9), the surface of washery (1) just is close to the top and is fixed and is linked together and take out pressure pipe (16), the inside of washery (1) just is located square hole (6) below and is equipped with crane (17), cross chamber (18) have been seted up on the surface equidistant of crane (17), the inside of crane (17) just is located cross chamber (18) and all fixedly connected with otter board (19), the trilateral and the department that is close to the bottom center of crane (17) all is fixedly connected with stopper (20), the center department of stopper (20) is fixed and is connected with stopper (21) and is located the both ends of the fixed connection of both sides of stopper (21) and the bottom (23), the center of the lifting plate (23) is penetrated and connected with a screw rod (22) in a threaded manner.
  2. 2. The device for improving poor copper sheet separation after PCB slot tin spraying according to claim 1, wherein supporting legs (2) are fixedly connected to the bottom of the cleaning kettle (1) at equal intervals near the edge, and the bottoms of the supporting legs (2) are trapezoidal.
  3. 3. The device for improving poor copper sheet separation after PCB slot tin spraying according to claim 1 is characterized in that a control panel (3) is arranged on the surface of the cleaning kettle (1).
  4. 4. The device for improving poor copper sheet separation after PCB slot tin spraying according to claim 1 is characterized in that a heating cylinder (5) is fixedly connected to the inner wall of the cleaning kettle (1), and a cooling coil (4) is arranged in the inner wall of the cleaning kettle (1).
  5. 5. The device for improving poor copper sheet separation after PCB slot tin spraying according to claim 1 is characterized in that a pressure gauge (11) and a safety relief valve (12) are fixedly arranged at the top of the kettle cover (7).
  6. 6. The device for improving poor copper sheet separation after PCB slot tin spraying according to claim 1, wherein the top of the cleaning kettle (1) is provided with a ring groove (13), a ring plate (14) is embedded in the ring groove (13), the bottom of the ring plate (14) is fixedly connected with a sealing ring pad (15), and the top of the ring plate (14) is fixedly connected with the bottom of the kettle cover (7).
  7. 7. The device for improving poor copper sheet separation after PCB slot tin spraying according to claim 1, wherein the top of the screw rod (22) is rotatably connected with a bearing on the inner wall of the top of the cleaning kettle (1), the bottom of the screw rod (22) penetrates through the bottom of the cleaning kettle (1) and is rotatably connected with the bearing of the cleaning kettle, the bottom of the cleaning kettle (1) is fixedly connected with a driving motor (24), and the output end of the driving motor (24) is fixedly connected with the bottom of the screw rod (22).

Description

Improve poor manufacturing installation of copper sheet separation behind PCB slotted hole tin spraying Technical Field The utility model relates to the technical field of PCB manufacture, in particular to a manufacturing device for improving poor copper sheet separation after PCB slot tin spraying. Background With the rapid development of emerging technologies such as 5G communication, artificial intelligence, and internet of things, the demands of the global electronics industry for PCBs (printed circuit boards) continue to increase, and demands for PCB performance are becoming more stringent. The PCB slot is used as a key part for connecting different layers of circuits and mounting electronic components, and the processing precision and the surface treatment quality directly determine the performance of the PCB. In the slot tin spraying process, the poor separation problem of copper sheets seriously affects the stability and the service life of electronic products, the residual liquid medicine in a narrow space of a slot is difficult to remove depending on conventional washing and drying processes, and becomes a hidden corrosion trouble, and the traditional washing mode is difficult to meet the production requirement of high-quality PCBs. The traditional cleaning mode can not penetrate into the fine structure of the PCB slot hole, residues (such as liquid medicine and impurities) remain, copper sheets are separated due to thermal stress and chemical corrosion during tin spraying, the reject ratio is high, meanwhile, the high-pressure water gun and improper chemical cleaning easily cause deformation of the PCB copper foil, loosening of welding spots of components and parts, influence the electrical performance, and increase the rejection rate of products. Disclosure of utility model The utility model aims to solve the problems that the residual liquid medicine in the narrow space of a slot hole exists in the prior art, the conventional washing and drying processes are relied on to be difficult to remove, and the hidden danger of corrosion is caused, and provides a manufacturing device for improving poor copper sheet separation after tin spraying of a PCB slot hole. In order to achieve the aim, the manufacturing device for improving poor copper sheet separation after tin spraying of the PCB slotted holes comprises a cleaning kettle, square holes are formed in the top of the cleaning kettle, a kettle cover is covered on the top of the cleaning kettle, a CO 2 pipe and a methanol pipe are fixedly and communicated with the top of the kettle cover, a high-precision metering pump is mounted on the methanol pipe, the surface of the cleaning kettle is fixedly and communicated with a pumping pipe near the top, lifting frames are arranged in the cleaning kettle and below the square holes, cross cavities are formed in the surface of the lifting frames at equal intervals, screen plates are fixedly connected to the upper portion and the lower portion of the cross cavities, limiting blocks are fixedly connected to the three surfaces of the lifting frames and near the center of the bottom, limiting rods penetrate through the center of the limiting blocks, two ends of the limiting rods are fixedly connected with the cleaning kettle, lifting plates are fixedly connected to the other surfaces of the lifting frames and near the center of the bottom, and screw rods are connected to the center of the lifting plates in a penetrating and threaded mode. Preferably, the bottom of the cleaning kettle is fixedly connected with supporting legs at equal intervals near the edge, and the bottoms of the supporting legs are trapezoidal. Preferably, a control panel is arranged on the surface of the cleaning kettle. Preferably, the inner wall fixedly connected with heating cylinder of cleaning kettle, the inner wall internally mounted of cleaning kettle has cooling coil. Preferably, a pressure gauge and a safety relief valve are fixedly arranged at the top of the kettle cover. Preferably, the top of the cleaning kettle is provided with a ring groove, a ring plate is embedded in the ring groove, the bottom of the ring plate is fixedly connected with a sealing ring pad, and the top of the ring plate is fixedly connected with the bottom of the kettle cover. Preferably, the top of screw rod is connected with the inner wall bearing in cleaning kettle top rotation, the bottom of screw rod runs through cleaning kettle bottom and rotates with its bearing and be connected, cleaning kettle's bottom fixedly connected with driving motor, driving motor's output and the bottom fixed connection of screw rod. Compared with the prior art, the utility model has the advantages and positive effects that, 1. In the utility model, the supercritical CO 2 has both gas diffusivity and liquid solubility, and can penetrate into the slot of the PCB by matching with the cross cavity and the screen plate structure in the device, thereby thoroughly removing residues in