An on-line automatic cleaning apparatus for PCB mold

Abstract

The present application relates to a kind of PCB mould on-line automatic cleaning equipment, belong to mould cleaning technical field, to solve the technical problems such as traditional PCB mould cleaning low efficiency, cleaning is not thorough, easily damage mould, and there is static adsorption impurity, stubborn impurity in leak hole is difficult to clean, the equipment includes the mechanical arm of being fixed in stamping die one side, detachable fixed connection has telescopic support in mechanical arm tail end, telescopic support is equipped with adsorption head, rear stage cleaning roller, front stage conductive roller and hole cleaning component, motor I drives telescopic support to push adsorption head and enter mould, front stage conductive roller guides and removes impurity static, rear stage cleaning roller sweeps surface impurity, hole cleaning component breaks and sweeps stubborn impurity in leak hole, adsorption head synchronously sucks away debris, the present application realizes PCB mould on-line automatic cleaning, without manual intervention, cleaning efficiency is high, can protect mould from damage, reduce use cost, guarantee PCB production quality.

Description

Technical Field

[0001] This invention belongs to the field of mold cleaning technology and relates to an online automatic cleaning device for PCB molds. Background Technology

[0002] PCB molds are core equipment used in the electronics manufacturing industry for stamping and forming PCB boards. The cleanliness of their surface and holes directly affects the forming accuracy and product qualification rate of the PCB board. During long-term use of PCB molds, PCB debris, dust and other impurities generated during stamping will adhere to the mold surface. Some stubborn impurities will also get stuck in the mold holes. If they are not cleaned in time, they will cause problems such as burrs, deformation and hole blockage during PCB board forming, reducing product quality. At the same time, the accumulation of impurities will also accelerate the wear of the mold and shorten its service life.

[0003] Currently, PCB mold cleaning mainly adopts two methods: manual cleaning and traditional mechanical cleaning. Manual cleaning requires operators to manually disassemble the mold and use tools such as brushes and air guns to clean it. This is not only labor-intensive and inefficient, but the cleaning effect is also greatly affected by the operator's experience, making it difficult to completely remove stubborn stuck impurities in the holes. At the same time, manual operation can easily scratch the mold surface, affecting the mold's precision. Traditional mechanical cleaning usually involves adding an external ion fan to neutralize static electricity. However, the airflow inside the punch press is turbulent, and the ion fan often cannot accurately reach the dead corners. Ordinary anti-static brushes, lacking a direct physical grounding circuit, are ineffective in the face of large amounts of high-voltage static powder, causing the powder to be sucked back after being swept. For large molds with an opening height of only a few centimeters, the robust flange and pipelines of a six-axis robot are prone to interfering with and impacting the upper and lower mold plates. Although conventional extended and thinned straight rods can be inserted, they severely occupy the space of the workshop's external aisle when moving outside the mold, which can easily lead to safety accidents. Summary of the Invention

[0004] In view of this, in order to solve the above problems, the present invention provides an online automatic cleaning device for PCB molds.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an online automatic cleaning device for PCB molds, comprising a robotic arm fixed to one side of the stamping mold; Also includes: The telescopic bracket is detachably fixed to the end of the robotic arm and includes a motor I, a bidirectional screw, a telescopic connecting rod, and an adsorption head. The motor I drives the bidirectional screw to rotate, which in turn drives the telescopic connecting rod to push the adsorption head into the stamping die. The adsorption head is connected to an external vacuum cleaner through a pipe to remove cleaning debris. The rear cleaning roller is rotatably mounted on one side of the adsorption head. The adsorption head is fixedly connected to motor IV, which drives the rear cleaning roller to rotate to clean impurities in the stamping die. The front conductive roller is rotatably mounted on the side of the rear cleaning roller away from the adsorption head. It is driven to rotate synchronously by the rear cleaning roller. The front conductive roller is connected to the grounding device of the robotic arm through a grounding wire to conduct the static electricity of impurities to the ground. The hole cleaning assembly is rotatably mounted between the rear cleaning roller and the front conductive roller. It includes multiple striking pins, tension springs and electromagnets. The electromagnets attract the striking pins away from the mold holes. After the electromagnets are disconnected, the striking pins are inserted into the holes to break up impurities under the action of the tension springs.

[0006] As a further improvement to the above technical solution: The telescopic support also includes a storage housing, which is detachably fixed to the end of the robotic arm. A bidirectional screw is rotatably mounted inside the storage housing. Motor I is fixed to one side of the storage housing, and its output end is fixed to one end of the bidirectional screw. Nut seats are threaded on the two oppositely helical sections of the bidirectional screw. One end of the telescopic connecting rod is rotatably connected to the nut seat, and the other end is hinged to the suction head through rotating seat I. Two rotating seats II are fixed to one side of the suction head. The rear cleaning roller, the front conductive roller, and the hole cleaning assembly are all rotatably mounted between the two rotating seats II.

[0007] Both sides of the housing are fixedly connected to a fixed sleeve. The fixed sleeve is coaxially arranged with the bidirectional screw. The outer wall of the fixed sleeve is rotatably fitted with a winding roller through a bearing. The outer wall of the winding roller is fixedly connected to and wound with traction ropes. The other ends of the two traction ropes are fixedly connected to the suction head to prevent the suction head from deflecting when it extends. The outer wall of the fixed sleeve is fitted with a torsion spring. The two ends of the torsion spring abut against the outer wall of the fixed sleeve and the inner wall of the winding roller, respectively, so as to realize the automatic winding of the traction ropes.

[0008] Both the rear cleaning roller and the front conductive roller include a rotating sleeve. An inner core shaft is movably mounted inside the rotating sleeve. Multiple brush bodies are fixed to the outer wall of the inner core shaft. A through hole adapted to the brush body is opened on the outer wall of the rotating sleeve. One end of the brush body extends through the through hole to the outside of the rotating sleeve. When the end of the brush body is worn, the inner core shaft moves into the rotating sleeve to push out the unworn brush body, ensuring a stable cleaning effect.

[0009] One end of the rotating sleeve is fixedly connected to a motor II, and the output end of the motor II is fixedly connected to a screw II. The inner mandrel has a threaded through hole at the end near the motor II, and the screw II is threaded into the threaded through hole. The motor II drives the screw II to rotate, which in turn drives the inner mandrel to move axially along the rotating sleeve.

[0010] The inner wall of the rotating sleeve is provided with multiple guide grooves, which are arranged along the axial direction of the rotating sleeve. Key pins are slidably fitted in the guide grooves, and multiple key pins are fixed to the outer wall of the inner mandrel to restrict the inner mandrel from rotating synchronously with the screw II.

[0011] The hole cleaning assembly also includes a rotating guide tube, with a support disc fixedly fitted at both ends. A support rib is fixedly connected between the two support discs to enhance structural stability. Multiple electromagnets are fixedly connected to the bottom of the rotating guide tube and correspond one-to-one with the striking pin. A guide sleeve is fixedly connected through the top of the support disc. The striking pin is slidably fitted through the guide sleeve. Limiting rings are fixedly fitted at the top of both the guide sleeve and the striking pin. A tension spring is fitted on the outer wall of the striking pin, with its two ends abutting against the two limiting rings respectively.

[0012] The rotating guide tube is a hollow structure, with one end sealed and the other end connected to an external air source through a pipe. The striking pin has a cavity, and the bottom outer wall has multiple exhaust holes. The middle outer wall has an air inlet hole that communicates with the cavity. When the striking pin is inserted into the hole, the air inlet hole communicates with the inside of the rotating guide tube. High-pressure gas enters the cavity through the air inlet hole and is then discharged through the exhaust hole to purge the broken impurities in the hole.

[0013] One of the rotating seats II is fixedly connected to a motor III on one side. The output end of motor III is fixedly connected to the sealing end of the rotating guide tube, which drives the rotating guide tube to rotate the hole cleaning component to achieve cleaning of the upper and lower templates.

[0014] The brush body of the front conductive roller is a flexible conductive contact brush made of interwoven pure copper wires. One end of the grounding wire is connected to the inner core shaft through a rotating joint to ensure grounding continuity when the inner core shaft moves or rotates. The brush body of the post-stage cleaning roller is a nylon cleaning brush with an anti-static coating to prevent it from generating static electricity and avoid the adsorption of impurities.

[0015] The beneficial effects of this invention are as follows: 1. The online automatic cleaning equipment for PCB mold disclosed in this invention can drive the suction head, the rear cleaning roller, the front conductive roller and the hole cleaning component to move precisely to each cleaning area of ​​the stamping mold through the multi-degree-of-freedom movement of the robotic arm and the precise pushing of the telescopic bracket, without the need for manual adjustment of the position, thus further improving the cleaning efficiency. 2. The online automatic cleaning device for PCB mold disclosed in this invention has a front conductive roller that uses a pure copper brush body and a grounding wire to conduct the static electricity carried by the mold surface and impurities to the ground, avoiding the difficulty of cleaning impurities due to static adsorption. The rear cleaning roller uses an anti-static nylon brush body to thoroughly clean the loose impurities on the mold surface, and works with the adsorption head to remove debris in time, avoiding secondary pollution. 3. The online automatic cleaning equipment for PCB molds disclosed in this invention uses a hole cleaning component to remove stubborn stuck impurities in the holes through physical impact of striking pins and high-pressure gas blowing, ensuring that both the mold surface and the holes meet the cleaning requirements, thereby improving the molding accuracy and product qualification rate of the PCB board.

[0016] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural schematic diagram of an online automatic cleaning device for PCB molds according to the present invention; Figure 2 This is a partial cross-sectional view of the telescopic bracket of an online automatic cleaning device for PCB molds according to the present invention. Figure 3 This is a schematic diagram of the winding roller installation structure of an online automatic cleaning device for PCB molds according to the present invention; Figure 4 This is a cross-sectional view of the rear cleaning roller and the front conductive roller of an online automatic cleaning device for PCB molds according to the present invention. Figure 5 This is a side view of the rear cleaning roller and the front conductive roller of an online automatic cleaning device for PCB molds according to the present invention. Figure 6 This is a schematic diagram of the hole cleaning component structure of an online automatic cleaning device for PCB molds according to the present invention; Figure 7 This is a cross-sectional view of the rotating guide tube and striking pin of an online automatic cleaning device for PCB molds according to the present invention.

[0018] Reference numerals: 1. Stamping die; 2. Robotic arm; 3. Telescopic bracket; 31. Storage housing; 32. Bidirectional screw; 33. Nut seat; 34. Motor I; 35. Telescopic connecting rod; 36. Rotating seat I; 37. Adsorption head; 38. Rotating seat II; 39. Traction rope; 310. Fixed sleeve; 311. Rewinding roller; 312. Torsion spring; 4. Rear cleaning roller; 5. Front conductive roller; 51. Rotating sleeve; 52. Motor II; 53. Screw II 54. Inner mandrel; 55. Threaded through hole; 56. Through hole; 57. Brush body; 58. Key pin; 59. Guide groove; 6. Hole cleaning assembly; 61. Rotating guide tube; 62. Support disc; 63. Motor III; 64. Guide sleeve; 65. Striking pin; 66. Support rib; 67. Electromagnet body; 68. Tension spring; 69. Limiting ring; 610. Accommodating cavity; 611. Exhaust through hole; 612. Intake through hole; 7. Motor IV. Detailed Implementation

[0019] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] Example 1 like Figures 1-5 As shown, an online automatic cleaning device for PCB molds can achieve online automatic cleaning of PCB molds without manual intervention, effectively solving the problems of low efficiency, incomplete cleaning, and easy damage to molds caused by traditional cleaning methods.

[0023] The equipment consists of a robotic arm 2, a telescopic support 3, a rear cleaning roller 4, a front conductive roller 5, and a motor Ⅳ7.

[0024] The robotic arm 2 is set on one side of the stamping die 1. The robotic arm 2 is an industrial conventional multi-degree-of-freedom robotic arm, which can move flexibly in multiple directions. Its end is detachably connected to the telescopic bracket 3 by bolts (or by electromagnet adsorption). The detachable design facilitates the subsequent maintenance, repair or replacement of the telescopic bracket 3, reducing equipment maintenance costs. At the same time, the telescopic bracket 3 can be replaced with a suitable one according to the different specifications of the stamping die 1. The telescopic support 3 includes a storage housing 31, a bidirectional screw 32, a nut seat 33, a motor I 34, a telescopic connecting rod 35, a rotating seat I 36, an adsorption head 37, a rotating seat II 38, a traction rope 39, a fixing sleeve 310, a winding roller 311, and a torsion spring 312. The storage housing 31 is detachably fixed to the end of the robotic arm 2. The storage housing 31 is made of aluminum alloy, which ensures structural strength while reducing the overall weight and avoiding increasing the load on the robotic arm 2. The storage housing 31 has an internal cavity for storing components such as the bidirectional screw 32 and the nut seat 33. An inspection port is provided on the side of the housing for easy inspection and maintenance of the internal components.

[0025] A bidirectional screw 32 is rotatably mounted within the receiving cavity of the housing 31. Both ends of the bidirectional screw 32 are rotatably connected to the inner wall of the housing 31 via bearings. Deep groove ball bearings are used to ensure smooth rotation of the bidirectional screw 32, reduce wear during rotation, and extend the service life of the component. A motor I 34 is bolted to one side of the housing 31. The output end of the motor I 34 is fixedly connected to one end of the bidirectional screw 32 via a coupling. The coupling effectively buffers the impact force when the motor I 34 starts, preventing damage to the bidirectional screw 32 due to excessive instantaneous force and ensuring stable rotation of the bidirectional screw 32. The bidirectional screw 32 has two threaded sections with opposite directions of rotation. Each threaded section is threaded with a nut seat 33. The outer wall of the nut seat 33 slides against the inner wall of the housing 31. The inner wall of the housing 31 has a groove that matches the nut seat 33. The groove is set along the axial direction of the bidirectional screw 32 to restrict the nut seat 33 from rotating synchronously with the bidirectional screw 32. When the bidirectional screw 32 rotates, the two nut seats 33 can move relative to each other or towards each other along the axial direction of the bidirectional screw 32, thereby driving the telescopic connecting rod 35 to unfold or retract. To ensure long-term stable operation in a dusty environment, a telescopic dust cover can be installed on the bidirectional screw 32, and sealed bearings or dust rings can be used at each rotating connection to prevent external pollutants from entering.

[0026] The telescopic link 35 is composed of multiple cross-rotating links. Both ends of one side are rotatably connected to two nut seats 33 via pins. Wear-resistant sleeves are fitted on the outer sides of the pins to reduce wear during rotation. The other end of the telescopic link 35 is hinged to the suction head 37 via a rotating seat I 36. The rotating seat I 36 is bolted to the back of the suction head 37, and a bearing is installed inside the rotating seat I 36 to ensure a secure connection between the telescopic link 35 and the suction head 37, enabling smooth pushing and retraction of the suction head 37. The suction head 37 has a hollow structure with multiple evenly distributed suction holes on one side for comprehensive absorption of debris generated during cleaning. The suction head 37 is connected to an external vacuum cleaner via a pipe. The external vacuum cleaner can quickly remove PCB debris generated during cleaning, preventing secondary contamination of the mold or equipment and preventing debris accumulation from affecting the cleaning effect.

[0027] Two rotating seats II 38 are fixed to one side of the adsorption head 37 by bolts. The two rotating seats II 38 are symmetrically arranged on both sides of the adsorption head 37. The rear cleaning roller 4, the front conductive roller 5 and the hole cleaning assembly 6 all rotate through the two rotating seats II 38. The two ends of the three are rotatably connected to the rotating seats II 38 by bearings. Sealed bearings are selected to prevent debris generated during the cleaning process from entering the bearing, ensuring smooth rotation, meeting the rotation requirements during cleaning operations, and extending the service life of the bearings.

[0028] The inner walls of both sides of the housing 31 are fixed with fixing sleeves 310 by bolts. The fixing sleeves 310 are coaxially arranged with the bidirectional screw 32. The outer wall of the fixing sleeves 310 is rotatably fitted with a take-up roller 311 through a bearing. The take-up roller 311 can rotate freely around the fixing sleeves 310. The outer wall of the take-up roller 311 is fixed and wound with traction ropes 39. The other ends of the two traction ropes 39 are fixedly connected to the back of the adsorption head 37 by bolts. The traction ropes 39 can play a traction and limiting role for the adsorption head 37, preventing the adsorption head 37 from deflecting due to uneven force when it extends, ensuring the accuracy of the cleaning position, and ensuring that the cleaning operation can accurately cover the mold surface and the holes. A torsion spring 312 is fitted on the outer wall of the fixed sleeve 310. The two ends of the torsion spring 312 abut against the outer wall of the fixed sleeve 310 and the inner wall of the winding drum 311, respectively. When the suction head 37 extends, the traction rope 39 pulls the winding drum 311 to rotate around the fixed sleeve 310, and the torsion spring 312 is twisted and stores energy. When the suction head 37 retracts, the torsion spring 312 resets and drives the winding drum 311 to rotate in the opposite direction, automatically winding up the traction rope 39. This prevents the traction rope 39 from becoming loose and tangled on the equipment, ensuring the normal operation of the equipment, and preventing the traction rope 39 from being damaged due to tangling and wear.

[0029] The rear cleaning roller 4 and the front conductive roller 5 have similar structures, both including a rotating sleeve 51, an inner core shaft 54, a brush body 57, a through hole 56, a motor II 52, a screw II 53, a threaded through hole 55, a guide groove 59, and a key pin 58. The rotating sleeve 51 is a hollow cylindrical structure, and its two ends are rotatably connected to the rotating seat II 38 through bearings. One end of the rotating sleeve 51 is fixed with the motor II 52 by bolts. The output end of the motor II 52 is fixed with the screw II 53 through a coupling. The coupling can ensure that the motor II 52 and the screw II 53 are firmly connected, the power transmission is stable, and slippage is avoided during the power transmission process.

[0030] The inner spindle 54 is movably disposed within the rotating sleeve 51 to ensure that the inner spindle 54 can move smoothly within the rotating sleeve 51. A threaded through hole 55 is provided at the end of the inner spindle 54 near the motor II 52. The screw II 53 is threadedly connected to the threaded through hole 55. Multiple guide grooves 59 are provided on the inner wall of the rotating sleeve 51. The guide grooves 59 are arranged along the axial direction of the rotating sleeve 51. Key pins 58 are slidably disposed in the guide grooves 59. Multiple key pins 58 are fixed to the outer wall of the inner spindle 54 by bolts. The key pins 58 slide with the guide grooves 59 to limit the inner spindle 54 from rotating synchronously with the screw II 53. When the screw II 53 rotates, the inner spindle 54 can move along the axial direction of the rotating sleeve 51, thereby driving the brush body 57 to extend or retract.

[0031] Multiple brush bodies 57 are bonded to the outer wall of the inner mandrel 54. The brush bodies 57 are evenly distributed on the outer wall of the inner mandrel 54 to ensure complete coverage of the mold surface during cleaning. The outer wall of the rotating sleeve 51 has through holes 56 that are adapted to the brush bodies 57. One end of the brush body 57 extends through the through hole 56 to the outside of the rotating sleeve 51 to contact the mold surface for cleaning. When the end of the brush body 57 is worn, the motor II 52 is started. The motor II 52 drives the screw II 53 to rotate. The screw II 53 drives the inner mandrel 54 to move into the rotating sleeve 51, pushing the unworn brush bodies 57 on the inner mandrel 54 out of the through hole 56 to replenish the worn parts. This eliminates the need for frequent replacement of the brush bodies 57, reduces operating costs, and ensures a consistently stable cleaning effect.

[0032] The brush body 57 in the front conductive roller 5 is a flexible conductive contact brush made of interwoven pure copper filaments. The pure copper filaments have good conductivity and a certain degree of flexibility, which can conform to the slight unevenness of the mold surface, avoiding scratching the mold surface, while fully contacting the mold surface and impurities to achieve electrostatic conduction. One end of the grounding wire is connected to the inner core shaft 54 ​​through a rotating joint. The rotating joint ensures that the grounding wire remains connected when the inner core shaft 54 ​​moves or rotates, and will not entangle or break. The other end of the grounding wire is connected to the grounding device of the robotic arm 2, which can conduct the static electricity carried by impurities during the cleaning process to the ground through the brush body 57, the inner core shaft 54, and the grounding wire, avoiding static electricity causing impurities to adhere to the surface of the mold or equipment, and improving the cleaning effect. The brush body 57 in the post-stage cleaning roller 4 is a conventional nylon cleaning brush with an antistatic coating. Nylon material is wear-resistant and tough, and can adapt to the wear requirements of long-term cleaning operations. The antistatic coating can effectively prevent the brush body 57 from generating static electricity, further avoiding the adsorption of impurities. It is suitable for cleaning loose impurities on the upper and lower mold surfaces inside the stamping die 1, and can quickly remove debris in conjunction with the adsorption head 37.

[0033] A motor IV7 is bolted to one side of the adsorption head 37. The output end of the motor IV7 is connected to the rotating sleeve 51 of the rear cleaning roller 4 via a synchronous pulley and a synchronous belt drive. The synchronous belt drive structure is stable and has high power transmission efficiency, enabling it to drive the rear cleaning roller 4 to rotate and clean impurities in the upper and lower dies of the stamping die 1. During the cleaning process, the debris generated is promptly sucked away by the adsorption head 37, preventing debris accumulation from affecting the cleaning effect and preventing debris from falling into the die gaps and becoming difficult to clean. At the same time, it drives the front conductive roller 5 to rotate synchronously, eliminating the need for an additional drive mechanism, simplifying the equipment structure, reducing equipment costs, and ensuring the rotational coordination between the front conductive roller 5 and the rear cleaning roller 4. The front conductive roller 5 first conducts static electricity away from the impurities, and then the rear cleaning roller 4 cleans them, avoiding static electricity adsorption that makes the impurities difficult to clean and improving cleaning efficiency.

[0034] Example 2 Reference Figures 1-7This invention provides a novel technical solution: an online automatic cleaning device for PCB molds. It further includes a hole cleaning assembly 6 rotatably disposed between the rear cleaning roller 4 and the front conductive roller 5, used to clean stubborn stuck impurities in the holes of the stamping die 1. The assembly includes a rotating guide tube 61, a support disc 62, a motor 63, a guide sleeve 64, a striking pin 65, a support rib 66, an electromagnet 67, a tension spring 68, a limiting ring 69, a receiving cavity 610, an exhaust port 611, and an air inlet port 612. The rotating guide tube 61 is hollow, with one end sealed and the other end connected to an external air source via a pipe. The external air source provides a stable purge air supply to clean the broken impurities in the holes. Both ends of the rotating guide tube 61 are fixedly fitted with support discs 62. The support discs 62 are fixedly connected to the rotating guide tube 61 by welding, and the connection is firm and not easy to fall off. A support rib 66 is fixed between the two support discs 62. The support rib 66 is fixed to the support disc 62 by welding. It is used to enhance the overall structural stability of the hole cleaning component 6, avoid structural deformation caused by vibration or impact during the cleaning process, and ensure that the striking pin 65 can accurately align with the hole.

[0035] Multiple electromagnets 67 are bolted to the bottom of the rotating guide tube 61. Each electromagnet 67 corresponds to the striking pin 65 and can stably attract the striking pin 65, enabling the lifting and lowering control of the striking pin 65. A guide sleeve 64 is fixedly installed through the top of the supporting disc 62. The guide sleeve 64 is welded to the supporting disc 62, and the striking pin 65 slides through the guide sleeve 64. The guide sleeve 64 guides the striking pin 65, ensuring stable axial movement and preventing deviation, thus ensuring accurate insertion of the striking pin 65 into the leakage hole. Limiting rings 69 are fixedly fitted on the top of the guide sleeve 64 and the top of the striking pin 65. The limiting rings 69 are fixed to the guide sleeve 64 and the striking pin 65 by welding. They are used to limit the position of the tension spring 68 and prevent the tension spring 68 from falling off. The tension spring 68 is fitted on the outer wall of the striking pin 65. The two ends of the tension spring 68 abut against the two limiting rings 69 respectively. In its natural state, it is in a stretched state and can provide a downward thrust to the striking pin 65, ensuring that the striking pin 65 has sufficient impact force to break up stubborn stuck impurities.

[0036] The striking pin 65 has a cavity 610 inside, which is arranged along the axial direction of the striking pin 65 to accommodate high-pressure gas. The bottom outer wall of the striking pin 65 has an exhaust hole 611. There are multiple exhaust holes 611, which are evenly distributed on the bottom outer wall of the striking pin 65 to facilitate the even blowing of high-pressure gas into the inside of the leak hole. The middle outer wall of the striking pin 65 has an air inlet hole 612, which is connected to the cavity 610. When the striking pin 65 moves downward and inserts into the mold hole, the air inlet hole 612 coincides with the internal space of the rotating guide tube 61 and is connected. The high-pressure gas in the rotating guide tube 61 enters the cavity 610 through the air inlet hole 612 and is discharged at high speed through the exhaust hole 611, cleaning the broken impurities in the leak hole and avoiding residue. The cleaned impurities are promptly sucked away by the suction head 37 to ensure the cleaning effect of the leak hole.

[0037] One of the rotating seats II38 has a motor III63 fixed to one side by bolts. The output end of the motor III63 is fixedly connected to the sealed end of the rotating guide tube 61 through a coupling. It can drive the rotating guide tube 61 to rotate the entire hole cleaning assembly 6, which facilitates the adjustment of the position of the striking pin 65. This allows the striking pin 65 to be accurately aligned with each hole of the upper and lower templates of the stamping die 1, achieving continuous cleaning of multiple holes without the need for manual adjustment, thus improving cleaning efficiency.

[0038] It also includes a PLC controller, which is electrically connected to motor I 34, motor II 52, motor III 63, motor IV 7, electromagnet 67, external air source, and external vacuum cleaner, respectively. The PLC controller is used to control the coordinated actions of each component according to preset logic: control motor I 34 to drive the telescopic bracket 3 to extend and retract, control motor IV 7 to drive the rear cleaning roller 4 and the front conductive roller 5 to rotate, control the electromagnet 67 to turn on and off to drive the striking pin 65 to rise and fall, control the external air source to start and stop to blow the holes, control the external vacuum cleaner to synchronously absorb debris, control motor II 52 to adjust the extension length of the brush body 57, and control motor III 63 to drive the hole cleaning component 6 to rotate.

[0039] The cleaning process is as follows: The robotic arm 2 is fixed at a preset position on one side of the stamping die 1, ensuring that it can move flexibly to various cleaning areas of the stamping die 1. The connections of each component are checked, confirming that the telescopic bracket 3 is securely connected to the robotic arm 2, that the rear cleaning roller 4, the front conductive roller 5, the hole cleaning assembly 6, and the rotating seat II 38 rotate smoothly, that the suction head 37 is tightly connected to the external vacuum cleaner's pipe, that the hole cleaning assembly 6 is properly connected to the external air source's pipe, and that all motor wiring is normal, ensuring the equipment can operate normally. Simultaneously, according to the specifications of the stamping die 1, the movement range of the robotic arm 2 and the extension stroke of the telescopic bracket 3 are adjusted to ensure that the suction head 37 can accurately move to the cleaning position within the stamping die 1.

[0040] The robotic arm 2 is activated, moving the telescopic bracket 3 to one side of the stamping die 1, aligning it with the feed inlet or cleaning start position of the stamping die 1. The motor I 34 is then activated, driving the bidirectional screw 32 to rotate. Since the two threads on the bidirectional screw 32 rotate in opposite directions, and the nut seats 33 are restricted from rotating by the grooves on the inner wall of the housing 31, the two nut seats 33 move towards each other along the bidirectional screw 32, causing the two sets of telescopic connecting rods 35 to unfold. The telescopic connecting rods 35 push the suction head 37 into the stamping die 1. During this movement, the suction head 37 pulls the traction rope 39, which in turn drives the take-up roller 311 to rotate around the fixed sleeve 310. The torsion spring 312 is twisted and stores energy, keeping the traction rope 39 taut and providing traction and limiting for the suction head 37, preventing it from deflecting due to uneven force, until the suction head 37 reaches the preset cleaning position and begins cleaning.

[0041] The external vacuum cleaner is activated, putting the suction head 37 into vacuuming mode. Then, motor IV7 is started. Motor IV7 drives the rotating sleeve 51 of the rear cleaning roller 4 to rotate via gear transmission. As the rear cleaning roller 4 rotates, it synchronously rotates the rotating sleeve 51 of the front conductive roller 5 via a belt. During the rotation of the front conductive roller 5, it is controlled by the robotic arm 2 to move downwards / upwards. The pure copper brush body 57 on its surface contacts the surfaces of the upper / lower molds inside the stamping die 1, transferring the static electricity carried by the mold surface and impurities attached to it to the inner core shaft 54 ​​through the brush body 57. This static electricity is then conducted to the grounding device of the robotic arm 2 via a grounding wire, ultimately reaching the ground, completing the static electricity discharge and preventing static adsorption that makes cleaning difficult. At the same time, the antistatic nylon brush body 57 on the surface of the rear cleaning roller 4 rotates synchronously to thoroughly clean the loose impurities on the mold surface. The PCB debris generated during the cleaning process is sucked away by the external vacuuming equipment through the dust suction hole at the bottom of the suction head 37, avoiding debris accumulation or secondary pollution, until the mold plane area is cleaned. Keep the motor IV7 and the external vacuuming equipment running, and proceed to the next cleaning step.

[0042] Before the cleaning work, the electromagnet 67 is activated in advance. The electromagnet 67 generates a magnetic force, which attracts the striking pin 65 and moves it upward. The striking pin 65 slides upward along the guide sleeve 64. At the same time, the tension spring 68 is further stretched and stores energy. When the striking pin 65 moves to the preset position, the power supply of the corresponding electromagnet 67 is disconnected. The electromagnet 67 loses its magnetic force, the tension spring 68 quickly returns to its original position, and pushes the striking pin 65 downward at a relatively fast speed. It is inserted into the leak hole along the guide sleeve 64 and the stubborn impurities stuck in the leak hole are broken up by physical impact.

[0043] The moment the striking pin 65 inserts into the leak hole, the air inlet 612 on its outer wall coincides and connects with the internal space of the rotating guide tube 61, activating the external air source. High-pressure gas is introduced into the rotating guide tube 61, passing through the air inlet 612 into the cavity 610 of the striking pin 65, and then exiting at high speed through multiple exhaust holes 611 at the bottom of the striking pin 65, cleaning the broken impurities from the leak hole. The cleaned impurities are promptly sucked away by the suction head 37 to prevent residue from clogging the leak hole. After cleaning a single leak hole, the electromagnet 67 is activated again, generating suction to move the striking pin 65 upwards. The striking pin 65 slides upwards along the guide sleeve 64, while the tension spring 68 is further stretched and stores energy. The position of the striking pin 65 is adjusted to align with the next leak hole, and the striking and purging steps are repeated until all stubborn stuck impurities in all leak holes are cleaned. The external air source and motor Ⅲ 63 are then shut off.

[0044] If the cleaning effect of the rear cleaning roller 4 or the front conductive roller 5 decreases during the cleaning process, it indicates that the end of the brush body 57 is worn. At this time, the motor II 52 on the corresponding roller body is started. The motor II 52 drives the screw II 53 to rotate. The screw II 53 drives the inner core shaft 54 ​​to move into the rotating sleeve 51 through the threaded connection. The inner core shaft 54 ​​drives the brush body 57 on its outer wall to move, pushing the unworn brush body 57 on the inner core shaft 54 ​​out of the through hole 56 of the rotating sleeve 51 to replenish the worn part until the brush body 57 is restored to the preset working length and can normally contact the mold surface for cleaning. Then, the motor II 52 is turned off and the cleaning operation continues.

[0045] When cleaning of the upper template is required, start motor III 63. Motor III 63 drives the rotating guide tube 61 to rotate. The rotating guide tube 61 drives the support disc 62, guide sleeve 64, striking pin 65 and other components to rotate synchronously. Adjust the striking pin 65 to face upwards so that each striking pin 65 is aligned with the lower part of each hole on the upper template of the stamping die 1. After alignment is completed, turn off motor III 63 and keep the striking pin 65 in line with the hole position. Cleaning is carried out in sequence.

[0046] After all cleaning operations are completed, turn off motor IV7 and the external vacuum equipment, and start motor I34 to rotate in reverse. Motor I34 drives the bidirectional screw 32 to rotate in reverse, and the two nut seats 33 move in opposite directions along the bidirectional screw 32, causing the two sets of telescopic connecting rods 35 to retract. The telescopic connecting rods 35 pull the suction head 37 back to the storage housing 31. At the same time, the torsion spring 312 resets, causing the take-up roller 311 to rotate in reverse, automatically winding the traction rope 39 onto the take-up roller 311 to prevent the traction rope 39 from becoming loose and tangled. When the suction head 37 retracts to the preset position on the side of the storage housing 31, turn off motor I34, start robotic arm 2, and robotic arm 2 moves the telescopic bracket 3 to the initial position. Turn off all motors and related equipment, check whether all parts of the equipment have reset normally, clean the small amount of residual debris on the surface of the equipment, and complete a complete online automatic cleaning process for PCB molds.

[0047] However, as is well known to those skilled in the art, the working principles and wiring methods of robotic arm 2, motor I 34, motor II 52, motor III 63, electromagnet 67 and motor IV 7 are all conventional methods or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An online automatic cleaning device for PCB molds, comprising a robotic arm (2) fixed to one side of a stamping mold (1); Its features are, Also includes: The telescopic bracket (3) is detachably fixed to the end of the robotic arm (2), including motor I (34), bidirectional screw (32), telescopic connecting rod (35) and suction head (37). Motor I (34) drives the bidirectional screw (32) to rotate, which drives the telescopic connecting rod (35) to push the suction head (37) into the stamping die (1). The suction head (37) is connected to the external vacuum cleaner through the pipe to suck up cleaning debris. The rear cleaning roller (4) is rotatably mounted on one side of the adsorption head (37). The adsorption head (37) is fixedly connected to the motor IV (7). The motor IV (7) drives the rear cleaning roller (4) to rotate to clean impurities in the stamping die (1). The front conductive roller (5) is rotatably mounted on the side of the rear cleaning roller (4) away from the adsorption head (37). It is driven to rotate synchronously by the rear cleaning roller (4). The front conductive roller (5) is connected to the grounding device of the robotic arm (2) through a grounding wire to conduct the static electricity of impurities to the ground. The hole cleaning assembly (6) is rotatably mounted between the rear cleaning roller (4) and the front conductive roller (5). It includes multiple striking pins (65), a tension spring (68) and an electromagnet (67). The electromagnet (67) attracts the striking pins (65) away from the mold hole. After the electromagnet (67) is disconnected, the striking pins (65) are inserted into the hole to break up the impurities under the action of the tension spring (68).

2. The online automatic cleaning equipment for PCB molds according to claim 1, characterized in that, The telescopic bracket (3) also includes a storage housing (31), which is detachably fixed to the end of the robotic arm (2). A bidirectional screw (32) is rotatably installed inside the storage housing (31). Motor I (34) is fixed to one side of the storage housing (31), and its output end is fixed to one end of the bidirectional screw (32). Nut seats (33) are threaded on the two opposite screw sections of the bidirectional screw (32). One end of the telescopic connecting rod (35) is rotatably connected to the nut seat (33), and the other end is hinged to the suction head (37) through the rotating seat I (36). Two rotating seats II (38) are fixed to one side of the suction head (37). The rear cleaning roller (4), the front conductive roller (5), and the hole cleaning assembly (6) are rotatably installed between the two rotating seats II (38).

3. The online automatic cleaning equipment for PCB molds according to claim 2, characterized in that, The inner walls of both sides of the housing (31) are fixedly connected to a fixed sleeve (310). The fixed sleeve (310) is coaxially arranged with the bidirectional screw (32). The outer wall of the fixed sleeve (310) is rotatably fitted with a winding roller (311) through a bearing. The outer wall of the winding roller (311) is fixedly connected to and wound with a traction rope (39). The other ends of the two traction ropes (39) are fixedly connected to the suction head (37) to prevent the suction head (37) from deflecting when it extends. The outer wall of the fixed sleeve (310) is fitted with a torsion spring (312). The two ends of the torsion spring (312) abut against the outer wall of the fixed sleeve (310) and the inner wall of the winding roller (311) respectively, so as to realize the automatic winding of the traction rope (39).

4. The online automatic cleaning equipment for PCB molds according to claim 2, characterized in that, Both the rear cleaning roller (4) and the front conductive roller (5) include a rotating sleeve (51). An inner core shaft (54) is movably mounted inside the rotating sleeve (51). Multiple brush bodies (57) are fixedly connected to the outer wall of the inner core shaft (54). A through hole (56) adapted to the brush body (57) is opened on the outer wall of the rotating sleeve (51). One end of the brush body (57) extends through the through hole (56) to the outside of the rotating sleeve (51). When the end of the brush body (57) is worn out, the inner core shaft (54) moves into the rotating sleeve (51) to push out the unworn brush body (57), ensuring a stable cleaning effect.

5. The online automatic cleaning equipment for PCB molds according to claim 4, characterized in that, One end of the rotating sleeve (51) is fixedly connected to a motor II (52), and the output end of the motor II (52) is fixedly connected to a screw II (53). The inner spindle (54) has a threaded through hole (55) near the motor II (52). The screw II (53) is threaded into the threaded through hole (55). The motor II (52) drives the screw II (53) to rotate, which in turn drives the inner spindle (54) to move axially along the rotating sleeve (51).

6. The online automatic cleaning equipment for PCB molds according to claim 5, characterized in that, The inner wall of the rotating sleeve (51) is provided with multiple guide grooves (59). The guide grooves (59) are arranged along the axial direction of the rotating sleeve (51). Key pins (58) are slidably fitted in the guide grooves (59). Multiple key pins (58) are fixed to the outer wall of the inner mandrel (54) to restrict the inner mandrel (54) from rotating synchronously with the screw II (53).

7. The online automatic cleaning equipment for PCB molds according to claim 1, characterized in that, The hole cleaning assembly (6) also includes a rotating guide tube (61), both ends of which are fixedly fitted with support discs (62). Support ribs (66) are fixedly connected between the two support discs (62) to enhance structural stability. Multiple electromagnets (67) are fixedly connected to the bottom of the rotating guide tube (61) and correspond one-to-one with the striking pins (65). A guide sleeve (64) is fixedly connected through the top of the support discs (62). The striking pins (65) are slidably fitted inside the guide sleeve (64). Limiting rings (69) are fixedly fitted on the top of both the guide sleeve (64) and the striking pins (65). A tension spring (68) is fitted on the outer wall of the striking pins (65), and both ends abut against the two limiting rings (69).

8. The online automatic cleaning equipment for PCB molds according to claim 7, characterized in that, The rotating guide tube (61) is a hollow structure, with one end sealed and the other end connected to an external air source through a pipe. The striking pin (65) has a cavity (610) inside, and multiple exhaust holes (611) are opened on the outer wall at the bottom. An air inlet hole (612) connected to the cavity (610) is opened on the outer wall in the middle. When the striking pin (65) is inserted into the hole, the air inlet hole (612) is connected to the inside of the rotating guide tube (61). High-pressure gas enters the cavity (610) through the air inlet hole (612) and then exits through the exhaust hole (611) to purge the broken impurities in the hole.

9. An online automatic cleaning device for PCB molds according to claim 8, characterized in that, One of the rotating seats II (38) is fixedly connected to a motor III (63) on one side. The output end of the motor III (63) is fixedly connected to the sealing end of the rotating guide tube (61), which drives the rotating guide tube (61) to rotate the hole cleaning component (6) to achieve cleaning of the upper and lower templates.

10. An online automatic cleaning device for a PCB mold according to any one of claims 4 to 9, characterized in that, The brush body (57) of the front conductive roller (5) is a flexible conductive contact brush made of pure copper wires interwoven together. One end of the grounding wire is connected to the inner core shaft (54) through a rotating joint to ensure grounding conduction when the inner core shaft (54) moves or rotates. The brush body (57) of the post-stage cleaning roller (4) is a nylon cleaning brush with an antistatic coating to prevent static electricity from being generated and to avoid the adsorption of impurities.

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