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CN-120091502-B - Flexible circuit forming machine and manufacturing method thereof

CN120091502BCN 120091502 BCN120091502 BCN 120091502BCN-120091502-B

Abstract

The invention discloses a flexible circuit forming machine and a manufacturing method thereof, relating to the technical field of flexible circuit manufacture, wherein the device comprises a bracket component, a laser component, a spraying component, a rolling component and a control component, a 450nm blue light semiconductor laser is used for scanning the surface of a polyimide film to form a graphene pattern, the invention provides equipment and a method for preparing a flexible conductive circuit, a strain sensor and a piezoelectric heating device with low cost, which are small in size, convenient to operate and suitable for teaching demonstration, wound design and other scenes.

Inventors

  • HUANG HAIYANG
  • YU HUI
  • CHANG ZHICHENG
  • WANG YAN
  • ZHANG RUNLIANG
  • ZUO BIN

Assignees

  • 苏州市职业大学

Dates

Publication Date
20260508
Application Date
20250321

Claims (7)

  1. 1. A flexible circuit forming machine, comprising: A bracket assembly (100) comprising a horizontal frame (101), a movable cross beam (102) and front-back movement driving mechanisms (103-107); a laser assembly (200) comprising a laser (201), a laser holder (202), and left and right movement driving mechanisms (203-206); the spraying assembly (300) comprises a storage box (301), a peristaltic pump (302), a nozzle (307) capable of aligning laser paths and synchronous spraying driving mechanisms (308-311), so that the paths of the spraying assembly (300) for spraying the three-proofing paint are the same as the paths of laser sintering, and the circuit is ensured to be completely sprayed; A roll assembly (400) comprising a roll (401) of flexible rubber material and a moving platform mechanism (403-407); the control assembly (500) is used for coordinating laser sintering, three-proofing paint spraying and multi-station automatic control of rolling packaging; A flexible substrate (600) which is a laser sintering object and is used for generating a flexible conductive pattern of the laser-induced graphene; the laser (201) is a blue laser with the wavelength of 450nm, the light power range is 2.5-3.5W, the scanning speed range is 2000-2100mm/min, the sintering point number range is 10-13dot/mm so as to generate graphene conductive patterns, and the flexible substrate (600) is a polyimide film.
  2. 2. The flexible circuit forming machine according to claim 1, wherein the back-and-forth movement driving mechanism (103-107) comprises a beam driving motor (103), a beam belt (104), a beam roller (105), a transmission rod (106) and a beam pulley (107); The beam driving motor (103) is fixed on one side of the movable beam (102), the transmission rod (106) is fixedly arranged on an output shaft of the beam driving motor (103), two beam pulleys (107) are respectively arranged on two sides of the transmission rod (106) close to two end parts of the movable beam (102), the beam belt (104) is arranged on the beam pulleys (107), and two ends of the beam belt (104) are fixed on the horizontal frame (101); The beam belt wheel (107) is a meshing belt wheel with meshing teeth, the beam belt (104) is a meshing belt with the meshing teeth, the beam rollers (105) are arranged on two sides of the beam belt wheel (107), and the beam rollers (105) are used for pressing the beam belt (104) on the beam belt wheel (107); when the beam driving motor (103) rotates, the transmission rods (106) are driven to drive the beam pulleys (107) on two sides to synchronously rotate, and the beam pulleys (107) move along the beam belt (104), so that the movable beam (102) is driven to move along the beam belt (104), and the purpose of driving the laser assembly (200) to move back and forth is achieved.
  3. 3. The flexible circuit molding machine as claimed in claim 1, wherein the left-right movement driving mechanism (203-206) includes a laser holder driving motor (203), a laser holder pulley (204), a laser holder roller (205), and a laser holder belt (206); The laser device is characterized in that the laser device (201) and the laser support driving motor (203) are respectively fixed on the front side and the rear side of the laser support (202), the laser support belt wheel (204) is arranged on an output shaft of the laser support driving motor (203), one laser support roller (205) is respectively arranged on the two sides of the laser support belt wheel (204), when the laser support driving motor (203) rotates, the laser support belt wheel (204) is driven to rotate, so that the laser assembly (200) is driven to move along the laser support belt (206), and the purpose of driving the laser assembly (200) to move left and right is achieved.
  4. 4. The flexible circuit molding machine of claim 1, wherein the spray assembly (300) further comprises a spray bracket (303), a liquid inlet pipe (304), a liquid outlet pipe (305) and a nozzle bracket (306), and the synchronous spray driving mechanisms (308-311) comprise a spray driving motor (308), a moving block (309), a sliding rod (310) and a screw (311); The three-proofing paint special for the circuit board is arranged in the storage box (301), the storage box (301) and the peristaltic pump (302) are fixedly arranged on the spraying support (303), the spraying support (303) is fixed on the movable cross beam (102), a liquid inlet pipe (304) of the peristaltic pump (302) is embedded into the storage box (301), a liquid outlet pipe (305) of the peristaltic pump (302) is connected with the nozzle support (306), a through channel (3601) is arranged in the nozzle support (306), and the three-proofing paint is conveyed to the nozzle (307) through the channel (3601); The spray nozzle bracket (306) is fixedly connected with the moving block (309) through two sliding rods (310), the two sliding rods (310) penetrate through the front end of the laser bracket (202), a threaded hole is formed in the middle of the moving block (309), the screw rod (311) penetrates through the threaded hole of the moving block (309), one end of the screw rod (311) is fixed at the front end of the laser bracket (202), the other end of the screw rod (311) is fixedly connected with an output shaft of the spraying driving motor (308), and when the spraying driving motor (308) rotates, the nozzle bracket (306) can be driven to drive the spray nozzle (307) to move forwards and backwards.
  5. 5. The flexible circuit molding machine of claim 1 wherein said roller assembly (400) further comprises a roller support (402), said moving platform mechanism (403-407) comprising a moving platform (403), a moving platform drive motor (404), a moving platform pulley (405), a moving platform roller (406), a moving platform belt (407); The left and right sides of the press roller support (402) are respectively provided with one and fixed on the horizontal frame (101), a bearing (4021) is arranged in the center of the press roller support (402), and two end parts of the press roller (401) are fixed on inner holes of the bearing (4021); the movable platform (403) is arranged below the press roller (401), and the gap between the movable platform (403) and the press roller (401) ranges from 0mm to 0.3mm; four moving platform rollers (406) are arranged at the left end and the right end of the moving platform (403), and the moving platform rollers (406) are clamped in grooves of the horizontal frame (101) and can enable the moving platform (403) to move forward and backward smoothly; One side of the bottom of mobile platform (403) is installed mobile platform driving motor (404), be fixed with on the output shaft of mobile platform driving motor (404) mobile platform band pulley (405), install on mobile platform band pulley (405) mobile platform belt (407), the both ends of mobile platform belt (407) are fixed on horizontal frame (101), mobile platform roller (406) will mobile platform belt (407) compress tightly on mobile platform band pulley (405), works as mobile platform driving motor (404) rotate, the drive mobile platform band pulley (405) rotate, thereby make mobile platform (403) back-and-forth movement.
  6. 6. The flexible circuit molding machine according to any one of claims 1 to 5, wherein the pressing roller (401) is made of a composite structure of a metal core layer and a rubber outer cladding layer with a hardness of 65+/-5 Shore.
  7. 7. A method of manufacturing a flexible circuit, characterized by applying the molding machine of any one of claims 1-6, comprising the steps of: Step one, forming graphene conductive patterns by twice laser sintering; Step two, spraying and curing the three-proofing paint twice; Step three, paving a conductive leading-out layer; And step four, rolling and packaging the flexible silica gel film.

Description

Flexible circuit forming machine and manufacturing method thereof Technical Field The invention relates to the technical field of flexible circuit manufacturing, in particular to a flexible circuit forming machine and a manufacturing method thereof. Background The traditional flexible circuit needs to be customized in a professional production line through photolithography, chemical deposition and other processes, and has the defects of high equipment cost, long lead time, high flexible circuit cost and the like. Laser Induced Graphene (LIG) technology was first proposed in 2014 by James Tour, university of rice, U.S. chemist. The technology allows carbon atoms to recombine to generate conductive graphene ‌ by laser sintering of portions of polyimide polymer or other materials that do not belong to carbon. However, the existing laser-induced graphene equipment mostly adopts a CO 2 laser (with the wavelength of 10.6 μm), and has the problems of high use cost of the laser, low electro-optical efficiency, easy falling of graphene generated by sintering and the like, so that the laser-induced graphene (LIG) technology cannot be popularized and applied in the fields of flexible circuit manufacturing and application. Disclosure of Invention The invention aims to provide a flexible circuit forming machine and a manufacturing method thereof, which are used for solving the problems in the background technology. The flexible circuit forming machine comprises a support assembly, a laser assembly, a spraying assembly, a rolling assembly, a control assembly and a flexible substrate, wherein the support assembly comprises a horizontal frame, a movable cross beam and a front-back movement driving mechanism, the laser assembly comprises a laser, a laser support and a left-right movement driving mechanism, the spraying assembly comprises a storage box, a peristaltic pump, a nozzle capable of aligning a laser path and a synchronous spraying driving mechanism, the rolling assembly comprises a flexible rubber material compression roller and a movable platform mechanism, the control assembly is used for coordinating laser sintering, three-proofing paint spraying and multi-station automatic control of rolling packaging, and the flexible substrate is a laser sintering object and is used for generating flexible conductive patterns. The front-back movement driving mechanism comprises a beam driving motor, a beam belt, beam rollers, a transmission rod and a beam belt wheel, wherein the beam driving motor is fixed on one side of the movable beam, the transmission rod is fixedly arranged on an output shaft of the beam driving motor, the beam belt wheel is respectively arranged at positions, close to two ends of the movable beam, of the two sides of the transmission rod, the beam belt wheel is provided with the beam belt, two ends of the beam belt are fixed on the horizontal frame, the beam belt wheel is a meshing belt wheel with meshing teeth, and the beam belt is a meshing belt with the meshing teeth. When the beam driving motor rotates, the transmission rod is driven to drive the beam belt wheels on the two sides to synchronously rotate, and the beam belt wheels move along the beam belt, so that the movable beam is driven to move along the beam belt, and the purpose of driving the laser assembly to move back and forth is achieved. Further, the left-right movement driving mechanism comprises a laser bracket driving motor, a laser bracket belt wheel, a laser bracket roller and a laser bracket belt, wherein the laser and the laser bracket driving motor are respectively fixed on the front side and the rear side of the laser bracket, the laser bracket belt wheel is installed on an output shaft of the laser bracket driving motor, the laser bracket roller is respectively installed on the two sides of the laser bracket belt wheel, and when the laser bracket driving motor rotates, the laser bracket belt wheel is driven to rotate, so that the laser assembly is driven to move along the laser bracket belt, and the purpose of driving the laser assembly to move left and right is achieved. Furthermore, the spraying assembly further comprises a spraying support, a liquid inlet pipe, a liquid outlet pipe and a nozzle support, the synchronous spraying driving mechanism comprises a spraying driving motor, a moving block, a sliding rod and a screw rod, the storage box is internally provided with special three-proofing paint for a circuit board, the storage box and the peristaltic pump are fixedly arranged on the spraying support, and the spraying support is fixed on the moving cross beam. The peristaltic pump is characterized in that the liquid inlet pipe of the peristaltic pump is embedded into the storage box, the liquid outlet pipe of the peristaltic pump is connected with the nozzle support, a through channel is designed in the nozzle support, three-proofing paint is conveyed to the nozzle through the channel, the nozzle support is fixedly connecte