A circular knife die cutting control system for circuit board processing

Abstract

The present invention discloses a circular knife die-cutting control system for circuit board processing, and relates to the technical field of circuit board processing. In the present invention, a conveying roller is rotatably arranged on one side of the horizontal discharge cavity close to the conveying mechanism, and the horizontal conveying of the divided circuit board strips is achieved by controlling the rotation of the conveying roller. A vertically arranged cutting notch is provided on the surface of the cutting bearing part, and a cutting knife matched with the cutting notch is provided directly below the cutting bearing part. An installation cavity matched with the cutting bearing part is provided on the surface of the discharge plate, and the discharge plate is gap-fitted inside the horizontal discharge cavity. A cutting push roller that can reciprocate up and down is provided directly above the installation cavity, and the first meshing part is used to control the rotation of the discharge plate, and the second meshing part is used to control the rotation of the conveying roller. After the cutting push roller is lifted to the initial position by the hydraulic cylinder, the cut circuit board strips on it can be made to slide down and be collected by controlling the discharge plate to rotate counterclockwise by a certain angle.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board processing, and in particular relates to a circular knife die-cutting control system for circuit board processing. Background Art

[0002] Flexible circuit boards are printed circuits made of flexible insulating substrates. They are used to provide excellent electrical properties, meet the design needs of smaller and higher density installations, and also help reduce assembly processes and enhance reliability. In the production and processing of flexible circuit boards, cutting equipment is required to cut the flexible circuit boards. Generally, flexible circuit boards are mainly die-cut by the circular knife roller of a circular knife die-cutting device.

[0003] In the prior art, after the flexible circuit board is cut into circuit board strips of specified width by a circular knife die-cutting device, the cut circuit board strips fall onto a conveyor belt and are gradually transported to the rear end, and then the circuit board strips are cut into specified lengths by subsequent cutting components, thus completing the die-cutting process of the flexible circuit board.

[0004] However, the above circular knife die-cutting device has a low degree of automation when cutting flexible circuit boards, and cannot realize automatic control during the cutting process of flexible circuit boards, thereby reducing the production and processing efficiency of flexible circuit boards. To this end, we provide a circular knife die-cutting control system for circuit board processing to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a circular knife die-cutting control system for circuit board processing, which solves the problems in the above-mentioned background technology through the specific structural design of the circular knife die-cutting mechanism, the cutting control structure and the conveying mechanism.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is a circular knife die-cutting control system for circuit board processing, comprising a circular knife die-cutting mechanism, a cutting control structure and a conveying mechanism, wherein the circular knife die-cutting mechanism comprises a circular knife die-cutting roller, a cutting circular knife is installed around the circumferential side of the circular knife die-cutting roller, and a flexible circuit board is divided into circuit board strips by the rotation of the cutting circular knife, and the circuit board strips on the flexible circuit board are conveyed to the cutting control structure by the conveying mechanism; the cutting control structure comprises a discharge control mechanism, and a cutting conveying mechanism is fixedly installed on the inner side of the discharge control mechanism; wherein the cutting conveying mechanism comprises a horizontal conveying assembly, and a cutting assembly is installed below the horizontal conveying assembly.

[0008] The horizontal conveying assembly includes a horizontal discharge cavity, and a conveying roller is rotatably arranged on one side of the horizontal discharge cavity close to the conveying mechanism, and the horizontal conveying of the divided circuit board strips is achieved by controlling the rotation of the conveying roller; the cutting assembly includes a cutting bearing part installed in the horizontal discharge cavity and capable of elastically resetting up and down, and a vertically arranged cutting notch is opened on the surface of the cutting bearing part, and a cutting knife adapted to the cutting notch is arranged directly below the cutting bearing part, and when the cutting bearing part moves downward, the cutting knife is driven to move upward synchronously.

[0009] The discharging control mechanism includes a discharging power component, and an engaging control component is slidably installed on the inner side of the discharging power component; wherein, the discharging power component includes a rotatably arranged discharging plate, a mounting cavity adapted to the cutting bearing part is opened on the surface of the discharging plate, the discharging plate gap is fitted inside the horizontal discharging cavity, and a cutting pushing roller which can reciprocate up and down is arranged directly above the mounting cavity; the engaging control component includes a first engaging part and a second engaging part, the first engaging part is used to control the rotation of the discharging plate, and the second engaging part is used to control the rotation of the conveying roller, and the cutting pushing roller is controlled to move downward to push the cutting bearing part to move downward to achieve cooperation with the cutting knife to complete the cutting of the circuit board strips, and the cutting pushing roller continues to be driven to move downward until it is close to the cutting bearing part after it moves up and resets, and then in the process of controlling the cutting pushing roller to move upward, the discharging plate is driven to rotate a certain angle through the first engaged part which moves upward, so that the circuit board strips cut on the discharging plate slide down and fall off the discharging plate.

[0010] The present invention is further configured such that the discharging power assembly also includes a fixed frame, a discharging control shaft is rotatably arranged inside the fixed frame, the discharging plate is fixedly mounted on the circumferential side surface of the discharging control shaft, the circumferential side surface of the discharging control shaft is fixedly provided with positioning plates that are affixed to both sides of the discharging plate, a discharging gear is fixedly mounted on one end of the discharging control shaft, and a reset gear is fixedly mounted on the other end of the discharging control shaft.

[0011] The present invention is further configured as follows: a first mounting plate is fixedly provided on a side of the fixed frame opposite to the discharge gear, a third meshing portion slidably connected to the fixed frame is provided below the first mounting plate, the third meshing portion is meshed with the reset gear, and a first elastic member is provided between the third meshing portion and the first mounting plate; a vertically arranged hydraulic cylinder is installed on the top of the fixed frame, a lifting connecting frame is connected to the output end of the hydraulic cylinder, the cutting and pushing roller is fixedly installed on the bottom of the lifting connecting frame, two T-shaped support frames are symmetrically fixedly provided on a side of the fixed frame close to the conveying mechanism, and a first guide frame extending downward is fixedly provided on the T-shaped support frame corresponding to the reset gear.

[0012] The present invention is further configured such that the engagement control component also includes an annular mounting seat corresponding one to one with the T-shaped support frame, the annular mounting seat is slidably sleeved on the corresponding T-shaped support frame, and a horizontal support rod is fixedly arranged between the two annular mounting seats, the lifting connecting frame is fixedly sleeved on the horizontal support rod, a first fixing plate extending downward is fixedly arranged on the surface of the annular mounting seat corresponding to the discharge gear, a second guide frame is fixedly arranged on the bottom of the first fixing plate, a second fixing plate extending horizontally is fixedly arranged on the surface of the annular mounting seat corresponding to the reset gear, and a first L-shaped seat extending downward is fixedly arranged on one side of the second fixing plate.

[0013] The present invention is further configured such that a second L-shaped seat extending horizontally is fixedly connected to one side of the second guide frame through a support plate, a first limiting groove is opened in the bottom of the second L-shaped seat, a first movable member slidably connected to the first limiting groove is arranged inside the second L-shaped seat, a vertically arranged discharge control tooth plate is fixedly arranged on one side of the first movable member, a third L-shaped seat is fixedly arranged on one side of the second L-shaped seat, the third L-shaped seat is connected to the first movable member through a second elastic member, and a first electromagnet installed on the inner wall of the second L-shaped seat magnetically repels from a first permanent magnet installed on the first movable member.

[0014] The present invention is further configured such that a second limiting groove is opened at the bottom inner side of the first L-shaped seat, a second movable member slidably connected to the second limiting groove is arranged inside the first L-shaped seat, a conveying control tooth plate is fixedly arranged on one side of the second movable member, a second mounting plate is fixedly arranged on the inner wall of the first L-shaped seat, a movable rod fixedly connected to the second movable member is slidably arranged on the second mounting plate, a connecting disk fixed at the end of the movable rod is connected to the second mounting plate by a third elastic member, and a second electromagnet installed on the second mounting plate is magnetically attracted to a second permanent magnet installed on the second movable member.

[0015] The present invention is further configured as follows: the horizontal conveying assembly also includes a horizontal conveying platform, the horizontal discharge cavity is opened at the top of the horizontal conveying platform, the top of the horizontal conveying platform is rotatably provided with a first rotating shaft through an ear seat, the conveying roller is fixedly sleeved on the circumferential side of the first rotating shaft, and a conveying control gear is fixedly installed at one end of the first rotating shaft, and support parts are fixedly provided on opposite sides of the horizontal conveying platform, the support parts are fixedly provided on the inner wall of the fixed frame, and the discharge control shaft is rotatably provided between the two support parts; a positioning groove coaxial with the support part is opened on the inner wall of the horizontal discharge cavity, and the positioning plate is rotatably provided inside the corresponding positioning groove, an equipment mounting frame is fixedly provided on the side of the top of the horizontal conveying platform away from the conveying roller, a signal sensing device is installed on the top of the equipment mounting frame, both ends of the discharge plate are configured to be a first curved surface structure coaxial with the support part, and the opposite side walls of the horizontal discharge cavity are configured to be a second curved surface structure compatible with the first curved surface structure.

[0016] The present invention is further configured such that the cutting assembly also includes a second rotating shaft rotatably arranged between the two T-shaped support frames, a guide roller is fixedly sleeved on the circumferential side surface of the second rotating shaft, a counterweight roller is arranged directly below the cutting bearing portion, the cutting knife is fixedly installed on the circumferential side surface of the counterweight roller, the counterweight roller and the two guide rollers above it are connected by a transmission belt, the top of the transmission belt is fitted on the bottom of the discharge plate, a fixed shaft is arranged directly below the cutting bearing portion, the counterweight roller is fixedly sleeved on the circumferential side surface of the fixed shaft, limiting portions are fixedly arranged on both ends of the fixed shaft, and the first guide frame and the second guide frame are both slidably matched with the corresponding limiting portions.

[0017] The present invention is further configured as follows: the cutting bearing portion includes a first bearing member fittedly arranged on the top of the conveyor belt, a horizontal extension cavity connected to the installation cavity is opened at the bottom of the discharge plate, the first bearing member is slidably fitted inside the horizontal extension cavity, a second bearing member is fixedly arranged on the top of the first bearing member, the cutting opening is opened between the first bearing member and the second bearing member, the second bearing member has two opposite sides arranged to form a third curved surface structure coaxial with the support portion, the opposite side walls of the installation cavity are arranged to form a fourth curved surface structure adapted to the third curved surface structure, a limiting guide opening is opened at the top of the conveyor belt, and a limiting guide plate plugged and fitted inside the limiting guide opening is fixedly arranged at the bottom of the first bearing member.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention drives the lifting connection frame to move downward by a hydraulic cylinder, driving the cutting and pushing roller to move downward synchronously. When the cutting and pushing roller contacts the top of the second bearing member, the entire cutting and bearing part is pushed downward. In this process, the conveyor belt is pushed downward by the first bearing member that moves downward to make it concave. Under the action of the conveyor belt, the counterweight roller is driven to move upward until the cutting knife moves upward to the cutting notch to cut the circuit board strip. After the cutting of the circuit board strip is completed, the lifting connection frame is driven upward by the hydraulic cylinder. The upward movement drives the cutting and pushing roller to move upward synchronously. During the upward movement of the cutting and pushing roller, the conveyor belt is always close to the bottom of the first carrier, so that the counterweight roller can move downward smoothly until the second carrier is re-fitted into the installation cavity, and the counterweight roller and the cutting knife thereon return to the initial position. After the cutting and pushing roller is lifted to the initial position by the hydraulic cylinder, the cut circuit board strips thereon can be made to slide downward by controlling the discharge plate to rotate counterclockwise by a certain angle, that is, the circuit board strips slide downward along the discharge plate through the horizontal discharge cavity for collection.

[0020] 2. The present invention drives the lifting connection frame to move downward by a hydraulic cylinder, driving the cutting and pushing roller to move downward synchronously until the cutting and pushing roller is close to the second carrier. At this time, the conveying control tooth plate moves downward to below the conveying control gear. In this process, the conveying control tooth plate that moves downward drives the conveying control gear to rotate clockwise, and the conveying roller that rotates clockwise with the conveying control gear drives the cut circuit board strips to be transported forward, so that the cut circuit board strips on the horizontal conveyor belt can be transported to the discharge plate. Then, the second electromagnet on the second mounting plate is energized to magnetize, so that the conveying control tooth plate moves to compress the third elastic member until the conveying control tooth plate and the conveying control gear are horizontally misaligned, and then the lifting connection frame is driven by the hydraulic cylinder. The frame moves upward, driving the cutting and pushing roller to move upward synchronously until the cutting and pushing roller returns to the initial position. At this time, the conveying control tooth plate moves to the top of the conveying control gear, and then after controlling the second electromagnet to cut off power and demagnetize so that the conveying control tooth plate returns to the initial position, the circuit board strip is continuously conveyed to the discharge plate through the same conveying control method mentioned above until the active end of the circuit board strip is conveyed to the bottom of the equipment mounting frame. At this time, the signal sensing device detects the active end of the circuit board strip below it, and the controller receives the signal and controls the hydraulic cylinder to suspend operation, and at the same time controls the second electromagnet on the second mounting plate to energize and magnetize, so that the conveying control tooth plate moves to compress the third elastic member until the conveying control tooth plate and the conveying control gear are horizontally misaligned.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 The figure is a schematic diagram of the structure of a circular knife die-cutting control system for circuit board processing.

[0024] Figure 2 It is a structural schematic diagram of the interruption control structure of the present invention.

[0025] Figure 3 for Figure 2 Side view of the structure.

[0026] Figure 4 It is a structural schematic diagram of the discharge control mechanism in the present invention.

[0027] Figure 5 It is a structural schematic diagram of the discharge power component in the present invention.

[0028] Figure 6 for Figure 5 Schematic diagram of the structure from another angle.

[0029] Figure 7 It is a structural schematic diagram of the engagement control component in the present invention.

[0030] Figure 8 for Figure 7 A magnified view of the local structure at point A.

[0031] Fig. 9 for Figure 7 A magnified view of the local structure at point B in the middle.

[0032] Fig.10 It is a schematic structural diagram of the cutting and conveying mechanism of the present invention.

[0033] Fig.11 for Fig.10 Top view of the structure.

[0034] Fig.12 for Fig.10 Longitudinal structural section view.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1-cutting control structure, 2-discharging control mechanism, 3-cutting conveying mechanism, 4-horizontal conveying assembly, 401-horizontal discharging cavity, 402-conveying roller, 403-horizontal conveying platform, 404-first rotating shaft, 405-conveying control gear, 406-support part, 407-positioning groove, 408-equipment mounting frame, 5-cutting assembly, 501-cutting mouth, 502-cutting knife, 503-second rotating shaft, 504-guide roller, 505-weight roller, 506-transmission belt, 507-fixed shaft, 508-limiting part, 509-first bearing member, 510-second bearing member, 511-limiting guide port, 512-limiting guide plate, 6-discharging power assembly, 601-discharging plate, 602-installation cavity, 603-cutting and pushing roller, 604-fixed frame, 605-discharging control shaft, 606-positioning plate, 607-discharging gear, 608-reset gear, 609-third meshing part, 610-first elastic member, 611-hydraulic cylinder, 612-lifting connecting frame, 613-T-shaped support frame, 614-first guide frame, 7-meshing control assembly, 701-first meshing part, 702-second meshing part, 703-annular mounting seat, 704-horizontal support rod, 705-first fixed plate, 706-second guide frame, 707-second fixed plate, 708-first L-shaped seat, 709-second L-shaped seat, 710-first limiting groove, 711-first moving member, 712-discharging control tooth plate, 713-third L-shaped seat, 714-second elastic member, 715-second limiting groove, 716-second moving member, 717-conveying control tooth plate, 718-moving rod, 719-third elastic member, 8-horizontal conveyor belt. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] For specific embodiment 1, please refer to Figure 1-12 The present invention is a circular knife die-cutting control system for circuit board processing, comprising a circular knife die-cutting mechanism, a cutting control structure 1 and a conveying mechanism, wherein the circular knife die-cutting mechanism comprises a circular knife die-cutting roller, and a cutting circular knife is installed around the circumference of the circular knife die-cutting roller (the circular knife die-cutting roller is driven by a separately arranged power system, such as a motor driving the circular knife die-cutting roller to rotate), and the flexible circuit board is divided into circuit board strips of a specified width by the rotation of the cutting circular knife, and the circuit board strips on the flexible circuit board are conveyed to the cutting control structure 1 by the conveying mechanism;

[0039] The cutting control structure 1 includes a discharge control mechanism 2, and a cutting conveying mechanism 3 is fixedly installed inside the discharge control mechanism 2; wherein the cutting conveying mechanism 3 includes a horizontal conveying assembly 4, and a cutting assembly 5 is installed below the horizontal conveying assembly 4; the horizontal conveying assembly 4 includes a horizontal discharge cavity 401, and a conveying roller 402 is rotatably arranged on one side of the horizontal discharge cavity 401 close to the conveying mechanism, and the horizontal conveying of the cut circuit board strips is achieved by controlling the rotation of the conveying roller 402; the cutting assembly 5 includes a cutting bearing part installed inside the horizontal discharge cavity 401 and capable of elastically resetting up and down, and a vertically arranged cutting notch 501 is opened on the surface of the cutting bearing part, and a cutting knife 502 adapted to the cutting notch 501 is arranged directly below the cutting bearing part, and when the cutting bearing part moves downward, the cutting knife 502 is driven to move upward synchronously;

[0040] The discharge control mechanism 2 includes a discharge power assembly 6, and a meshing control assembly 7 is slidably installed inside the discharge power assembly 6; wherein the discharge power assembly 6 includes a rotatably arranged discharge plate 601, and a mounting cavity 602 adapted to the cutting bearing portion is provided on the surface of the discharge plate 601, and the discharge plate 601 is gap-fitted inside the horizontal discharge cavity 401, and a cutting pushing roller 603 capable of reciprocating up and down is arranged directly above the mounting cavity 602; the meshing control assembly 7 includes a first meshing portion 701 and a second meshing portion 702, and the first meshing portion 701 is used to control the discharge plate 60 1, the second meshing portion 702 is used to control the rotation of the conveying roller 402, and the cutting and pushing roller 603 is controlled to move downward to push the cutting and pushing bearing portion to move downward to achieve cooperation with the cutting knife 502 to complete the cutting of the circuit board strips. After the cutting and pushing roller 603 moves up and resets, it continues to be driven to move downward until it is close to the cutting and pushing bearing portion. Subsequently, in the process of controlling the cutting and pushing roller 603 to move upward, the upward-moving first meshing portion 701 drives the discharge plate 601 to rotate a certain angle, so that the circuit board strips cut on the discharge plate 601 slide downward and separate from the discharge plate 601.

[0041] In this embodiment of the present invention, the discharging power assembly 6 also includes a fixed frame 604, a discharging control shaft 605 is rotatably arranged inside the fixed frame 604, a discharging plate 601 is fixedly mounted on the side surface of the discharging control shaft 605, and a positioning plate 606 is fixedly arranged on the side surface of the discharging control shaft 605 to fit on both sides of the discharging plate 601, a discharging gear 607 is fixedly mounted on one end of the discharging control shaft 605, and a reset gear 608 is fixedly mounted on the other end of the discharging control shaft 605;

[0042] A first mounting plate is fixedly provided on one side of the fixed frame 604 relative to the discharge gear 607, a third meshing portion 609 slidably connected to the fixed frame 604 is provided below the first mounting plate, the third meshing portion 609 meshes with the reset gear 608, a first elastic member 610 is provided between the third meshing portion 609 and the first mounting plate, the discharge plate 601 is in a horizontal state in the initial state, the third meshing portion 609 maintains a meshing state with the reset gear 608 under the action of the first elastic member 610, when the discharge gear 607 is controlled to rotate counterclockwise (such as Figure 2 and Figure 5 As shown in the figure, the discharge control shaft 605 that rotates synchronously with the discharge gear 607 drives the reset gear 608 to rotate synchronously counterclockwise. Under the meshing action of the reset gear 608 and the third meshing portion 609, the third meshing portion 609 is driven to slide downward along the fixed frame 604 and stretch the first elastic member 610. After the meshing transmission of the discharge gear 607 is released, the third meshing portion 609 is moved up and reset by the elastic restoring force of the first elastic member 610. In this process, the discharge control shaft 605 is driven to rotate clockwise through the third meshing portion 609 until the discharge plate 601 returns to the initial horizontal state.

[0043] A vertically arranged hydraulic cylinder 611 is installed on the top of the fixed frame 604, and the output end of the hydraulic cylinder 611 is connected to the lifting connecting frame 612. The cutting and pushing roller 603 is fixedly installed at the bottom of the lifting connecting frame 612. Two T-shaped support frames 613 are symmetrically fixed on one side of the fixed frame 604 close to the conveying mechanism. A first guide frame 614 extending downward is fixedly set on the T-shaped support frame 613 corresponding to the reset gear 608. In this embodiment, the up and down movement of the cutting and pushing roller 603 is achieved by the telescopic movement of the hydraulic cylinder 611.

[0044] In this embodiment of the present invention, the horizontal conveying assembly 4 further includes a horizontal conveying platform 403, the curved surface of one side of the horizontal conveying platform 403 is attached to the horizontal conveyor belt 8 (such as Figure 1As shown in the figure, to ensure that the circuit board strips that have been cut on the horizontal conveyor belt 8 can be smoothly transported to the horizontal conveyor platform 403, the movable end of the circuit board strip can be pulled under the conveyor roller 402 at the beginning, and the continuous transportation of the circuit board strip can be achieved through the contact friction between the conveyor roller 402 and the circuit board strip. Since the peripheral side of the conveyor roller 402 is set to rubber material, the wear of the flexible circuit board during the transportation process can be avoided. The horizontal discharge cavity 401 is opened on the top of the horizontal conveyor platform 403, and the first rotating shaft 404 is rotatably set on the top of the horizontal conveyor platform 403 through the ear seat, and the conveyor roller 402 is fixedly sleeved on the peripheral side of the first rotating shaft 404, and one end of the first rotating shaft 404 is fixedly installed There is a conveying control gear 405, and support parts 406 are fixedly set on the opposite sides of the horizontal conveying platform 403. The support parts 406 are fixedly set on the inner wall of the fixed frame 604, so that the horizontal conveying platform 403 is kept fixed in a horizontal position. The discharge control shaft 605 is rotatably set between the two support parts 406. When the conveying control gear 405 is controlled to rotate clockwise, the conveying roller 402 can be driven to rotate clockwise, and then the circuit board strip on the horizontal conveying platform 403 is driven to move in the direction away from the conveying mechanism through the conveying roller 402 until the movable end of the circuit board strip is conveyed to the specified position, at which time the cutting process of the circuit board strip can be started (such as Figure 2 shown);

[0045] A positioning groove 407 coaxial with the support part 406 is formed on the inner wall of the horizontal discharge chamber 401, and the positioning plate 606 is rotatably arranged inside the corresponding positioning groove 407, so that the discharge plate 601 can be rotatably fitted in the horizontal discharge chamber 401, and an equipment mounting frame 408 is fixedly arranged on the side of the top of the horizontal conveying platform 403 away from the conveying roller 402, and a signal sensing device is installed on the top of the equipment mounting frame 408 (when the signal sensing device detects the active end of the circuit board strip below it, the controller receives the signal and controls the circuit board strip to stop conveying), both ends of the discharge plate 601 are arranged to be a first curved surface structure coaxial with the support part 406, and the opposite side walls of the horizontal discharge chamber 401 are arranged to be a second curved surface structure compatible with the first curved surface structure. Through this structural design, the smooth rotation of the discharge plate 601 in the horizontal discharge chamber 401 can be guaranteed.

[0046] In this embodiment of the present invention, the cutting assembly 5 also includes a second rotating shaft 503 rotatably arranged between the two T-shaped support frames 613, a guide roller 504 is fixedly sleeved on the side of the second rotating shaft 503, a counterweight roller 505 is arranged just below the cutting bearing portion, and the cutting knife 502 is fixedly installed on the side of the counterweight roller 505. The counterweight roller 505 and the two guide rollers 504 above it are connected by a transmission belt 506. The top of the transmission belt 506 is closely attached to the bottom of the discharge plate 601. A fixed shaft 507 is arranged just below the cutting bearing portion, and the counterweight roller 505 is fixedly sleeved around the fixed shaft 507. On the side, limiting portions 508 are fixedly provided at both ends of the fixed shaft 507, and the first guide frame 614 and the second guide frame 706 are slidably matched with the corresponding limiting portions 508. In the initial state, the limiting portion 508 corresponding to the first guide frame 614 is attached to its inner bottom, and the limiting portion 508 corresponding to the second guide frame 706 is attached to its inner bottom, so that the counterweight roller 505 and the cutting knife 502 thereon remain in the initial position. In the process of controlling the second guide frame 706 to move downward from the initial position, the counterweight roller 505 is supported by the transmission belt 506 and the first guide frame 614.

[0047] In this embodiment of the present invention, the cutting bearing portion includes a first bearing member 509 that is fitted on the top of the conveyor belt 506, a horizontal extension cavity that is connected to the installation cavity 602 is opened at the bottom of the discharge plate 601, and the first bearing member 509 is slidably fitted inside the horizontal extension cavity (the size of the horizontal extension cavity is larger than the first bearing member 509 to ensure that the first bearing member 509 does not hinder the rotation of the discharge plate 601 when the discharge plate 601 rotates), a second bearing member 510 is fixedly arranged on the top of the first bearing member 509, and the cutting cutout 501 is opened between the first bearing member 509 and the second bearing member 510, and the opposite sides of the second bearing member 510 are arranged to be a third curved surface structure coaxial with the support portion 406, and the opposite sides of the installation cavity 602 The walls are all arranged to form a fourth curved surface structure that is compatible with the third curved surface structure (through this structural design, when the discharge plate 601 is controlled to rotate, it is ensured that the existence of the first carrier 509 and the second carrier 510 will not hinder the rotation of the discharge plate 601), a limiting guide opening 511 is opened at the top of the conveyor belt 506, and a limiting guide plate 512 that is plugged into the limiting guide opening 511 is fixedly arranged at the bottom of the first carrier 509. This structural design can ensure that the first carrier 509 and the conveyor belt 506 will not be horizontally offset during the up and down movement of the cutting bearing part, thereby allowing the entire cutting bearing part to smoothly realize up and down reciprocating motion (that is, it can ensure that the second carrier 510 returns to the installation cavity 602).

[0048] The clockwise rotation of the conveying roller 402 causes the circuit board strip to be pulled and moved in the direction away from the conveying mechanism until the movable end of the circuit board strip is conveyed to the bottom of the equipment mounting frame 408. At this time, the signal sensing device detects the movable end of the circuit board strip below it, and the controller receives the signal and controls the circuit board strip to stop conveying. Then, the hydraulic cylinder 611 drives the lifting connecting frame 612 to move downward, driving the cutting and pressing roller 603 to move downward synchronously. When the cutting and pressing roller 603 contacts the top of the second bearing member 510, it pushes the entire cutting and pressing bearing part to move downward. In this process, the first bearing member 509 that moves downward pushes the conveyor belt 506 downward to make it concave. Under the action of the conveyor belt 506, the counterweight roller 505 is driven to move upward (the limiting part 508 corresponding to the first guide frame 614 slides upward along the first guide frame 614) until the cutting knife 502 moves upward to the cutting opening 501 to cut the circuit board strip. After the cutting, the circuit board strip is at the top of the discharge plate 601. After the cutting of the circuit board strip is completed, the hydraulic cylinder 6 11 drives the lifting connection frame 612 to move upward and drives the cutting and pushing roller 603 to move upward synchronously. During the upward movement of the cutting and pushing roller 603, the conveyor belt 506 is always close to the bottom of the first bearing member 509, so that the counterweight roller 505 can move downward smoothly until the second bearing member 510 is re-fitted into the installation cavity 602 (at this time, the first bearing member 509 is re-fitted into the horizontal extension cavity), the counterweight roller 505 and the cutting knife 502 thereon return to the initial position, and the cutting and pushing roller 603 is moved upward by the hydraulic cylinder 611. After the pressure roller 603 is lifted to the initial position, the cut circuit board strips on the discharge plate 601 can be made to slide downward by controlling the discharge plate 601 to rotate counterclockwise by a certain angle, that is, the circuit board strips slide downward along the discharge plate 601 through the horizontal discharge cavity 401 to be collected, and after the circuit board strips on the discharge plate 601 are discharged, the discharge plate 601 is controlled to rotate clockwise by the same angle to complete the reset (that is, the discharge plate 601 is in a horizontal state again), and the cutting and conveying processing of the next section of the circuit board strips is continued through the same control method as above.

[0049] Specific embodiment 2, on the basis of specific embodiment 1, the meshing control component 7 also includes an annular mounting seat 703 corresponding to the T-shaped support frame 613 one by one, the annular mounting seat 703 is slidably sleeved on the corresponding T-shaped support frame 613, and a horizontal support rod 704 is fixedly arranged between the two annular mounting seats 703, and the lifting connection frame 612 is fixedly sleeved on the horizontal support rod 704, so that the up and down movement of the horizontal support rod 704 can be achieved by controlling the up and down movement of the lifting connection frame 612, and then the annular mounting seat 703 slides up and down along the T-shaped support frame 613, thereby achieving the smooth up and down movement of the entire meshing control component 7, and the surface of the annular mounting seat 703 corresponding to the discharge gear 607 is fixedly provided with a first fixed plate 705 extending downward, and a second guide frame 706 is fixedly provided at the bottom of the first fixed plate 705, and the surface of the annular mounting seat 703 corresponding to the reset gear 608 is fixedly provided with a second fixed plate 707 extending horizontally, and a first L-shaped seat 708 extending downward is fixedly provided on one side of the second fixed plate 707.

[0050] In this embodiment of the present invention, a second L-shaped seat 709 extending horizontally is fixedly connected to one side of the second guide frame 706 through a support plate, a first limiting groove 710 is provided at the bottom of the second L-shaped seat 709, a first moving member 711 slidably connected to the first limiting groove 710 is arranged inside the second L-shaped seat 709, a vertically arranged discharging control tooth plate 712 is fixedly arranged on one side of the first moving member 711, a third L-shaped seat 713 is fixedly arranged on one side of the second L-shaped seat 709, the third L-shaped seat 713 is connected to the first moving member 711 through a second elastic member 714, the first electromagnet installed on the inner wall of the second L-shaped seat 709 and the first permanent magnet installed on the first moving member 711 magnetically repel each other, and in the initial state, under the pulling force of the second elastic member 714, the first moving member 711 is tightly attached to one end of the first limiting groove 710 close to the third L-shaped seat 713, and at this time, the discharging control tooth plate 712 and the discharging gear 607 are in a horizontally misaligned state (such as Figure 2 As shown), in the process of controlling the up and down movement of the cutting push roller 603 to cut the circuit board strip, the up and down movement of the discharge control tooth plate 712 will not drive the rotation of the discharge gear 607, and will not cause the rotation of the discharge plate 601. At this time, the first electromagnet on the second L-shaped seat 709 is in a power-off and demagnetized state.

[0051] In this embodiment of the present invention, a second limiting groove 715 is provided at the bottom of the first L-shaped seat 708, a second moving member 716 slidably connected to the second limiting groove 715 is provided inside the first L-shaped seat 708, a conveying control tooth plate 717 is fixedly provided on one side of the second moving member 716, a second mounting plate is fixedly provided on the inner wall of the first L-shaped seat 708, a moving rod 718 fixedly connected to the second moving member 716 is slidably provided on the second mounting plate, and a connecting disk fixed at the end of the moving rod 718 and the second mounting plate are connected by a third elastic member 71 9, the second electromagnet installed on the second mounting plate and the second permanent magnet installed on the second moving member 716 are magnetically attracted to each other. In the initial state, the conveying control tooth plate 717 is in a position where it can mesh with the conveying control gear 405 (that is, the conveying control tooth plate 717 and the conveying control gear 405 are not horizontally misaligned), and the conveying control tooth plate 717 is above the conveying control gear 405. Under the elastic force of the third elastic member 719, the second moving member 716 is closely attached to the end of the second limiting groove 715 away from the second mounting plate (such as Fig. 9 As shown in the figure), after the second electromagnet on the second mounting plate is energized and magnetized, the second movable member 716 is driven to move and compress the third elastic member 719 under the action of the magnetic attraction force. At this time, the conveying control tooth plate 717 and the conveying control gear 405 are horizontally misaligned. Subsequently, during the process of controlling the up and down movement of the conveying control tooth plate 717, the conveying control gear 405 will not be driven to rotate.

[0052] like Figure 2As shown, the hydraulic cylinder 611 drives the lifting connection frame 612 to move downward, driving the cutting and pushing roller 603 to move downward synchronously, until the cutting and pushing roller 603 is close to the second carrier 510 (that is, the cutting and pushing roller 603 is close to the top of the circuit board strip). At this time, the conveying control tooth plate 717 moves downward to below the conveying control gear 405. In this process, the conveying control tooth plate 717 that moves downward drives the conveying control gear 405 to rotate clockwise, and the conveying roller 402 that rotates clockwise with the conveying control gear 405 drives the cut circuit board strip to be conveyed forward, so that the cut circuit board strip on the horizontal conveyor belt 8 can be conveyed to the discharge plate 601, and then the second electromagnet on the second mounting plate is controlled to be energized and magnetized, so that the conveying control tooth plate 717 moves to compress the third elastic member 719 until the conveying control tooth plate 717 and the conveying control gear 405 are horizontally misaligned. Then, the hydraulic cylinder 611 drives the lifting connection frame 612 to move upward, driving the cutting and pushing roller 603 to move upward synchronously, until the cutting and pushing roller 603 returns to the initial position. At this time, the conveying control tooth plate 717 moves to the top of the conveying control gear 405, and then after the second electromagnet is controlled to be powered off and demagnetized so that the conveying control tooth plate 717 returns to the initial position, the circuit board strip is continuously conveyed to the discharge plate 601 through the same conveying control method as mentioned above, until the active end of the circuit board strip is conveyed to the bottom of the equipment mounting frame 408. At this time, the signal sensing device detects the active end of the circuit board strip below it, and the controller receives the signal and controls the hydraulic cylinder 611 to stop running, and at the same time controls the second electromagnet on the second mounting plate to be powered on and magnetized, so that the conveying control tooth plate 717 moves to compress the third elastic member 719 until the conveying control tooth plate 717 and the conveying control gear 405 are horizontally misaligned;

[0053] Next, the hydraulic cylinder 611 is continued to drive the lifting connection frame 612 to move downward, driving the cutting and pressing roller 603 to move downward synchronously, until the circuit board strip is cut. After the circuit board strip is cut, the hydraulic cylinder 611 is used to drive the lifting connection frame 612 to move upward, driving the cutting and pressing roller 603 to move upward synchronously. During the upward movement of the cutting and pressing roller 603, the conveyor belt 506 is always close to the bottom of the first bearing member 509, so that the counterweight roller 505 can be ensured to move downward smoothly until the second bearing member 510 is re-fitted into the installation cavity 602, and the counterweight roller 505 and the cutting knife 502 thereon return to the initial position. After the cutting and pressing roller 603 is lifted to the initial position, the hydraulic cylinder 611 is continued to drive the lifting connection frame 612 to move downward, driving the cutting and pressing roller 603 to move downward synchronously, until the cutting and pressing roller 603 is close to the second bearing member 510 (that is, the cutting and pressing roller 603 is close to the top of the circuit board strip), at this time, the discharge control tooth plate 712 moves downward to below the discharge gear 607, and then the first electromagnet on the second L-shaped seat 709 is controlled to be energized and magnetized, so that the first moving member 711 moves under the action of the magnetic repulsive force, and the discharge control tooth plate 712 that moves synchronously with the first moving member 711 moves to just below the discharge gear 607, and then the hydraulic cylinder 611 drives the lifting connection frame 612 to move downward, driving the cutting and pressing roller 603 to move downward synchronously, until the cutting and pressing roller 603 is close to the second bearing member 510 (that is, the cutting and pressing roller 603 is close to the top of the circuit board strip), and then the discharge control tooth plate 712 moves downward to below the discharge gear 607, and then the hydraulic cylinder 611 drives the lifting connection frame 612 to move downward, driving the cutting and pressing roller 603 to move downward, driving the cutting and pressing roller 603 to move downward, and finally the discharge control tooth plate 712 moves downward to below the discharge gear 607, and finally the discharge control tooth plate 712 moves downward to below the discharge gear 607, and finally the hydraulic cylinder 611 drives the lifting connection frame 612 to move downward, driving the cutting and pressing roller 603 to move downward, and finally the discharge control tooth plate 712 moves downward, driving the lifting connection frame 612 to move downward, and finally the discharge control tooth plate 712 moves downward, driving the lifting connection frame 612 to move downward, and finally the discharge control tooth In the process of the upward movement of the lowering connecting frame 612 driving the cutting and pressing roller 603 to move upward synchronously, the discharge control tooth plate 712 is used to drive the discharge gear 607 to rotate counterclockwise by a certain angle, so that the cut circuit board strips on the discharge plate 601 slide downward, that is, the circuit board strips slide downward along the discharge plate 601 through the horizontal discharge cavity 401 to be collected. At this time, the discharge control tooth plate 712 has not yet disengaged from the discharge gear 607, and then continues to drive the lifting connecting frame 612 to move upward through the hydraulic cylinder 611 to drive the cutting and pressing roller 603 to move upward synchronously until the cutting and pressing roller 603 returns to the initial position. At this time, the discharge control tooth plate 712 is disengaged from the discharge gear 607. The elastic restoring force of an elastic member 610 causes the third meshing portion 609 to move up and reset. During this process, the third meshing portion 609 drives the discharge control shaft 605 to rotate clockwise until the discharge plate 601 returns to its initial horizontal state. Finally, the controller simultaneously controls the first electromagnet and the second electromagnet to be powered off and demagnetized, so that the discharge control tooth plate 712 and the conveying control tooth plate 717 return to their initial positions, that is, the discharge control tooth plate 712 is horizontally misaligned with the discharge gear 607, and the conveying control tooth plate 717 returns to the position directly above the conveying control gear 405. In this way, the continuous cutting process of the circuit board strips can be achieved through the same control method as mentioned above.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A circular knife die-cutting control system for circuit board processing, comprising a circular knife die-cutting mechanism, wherein the circular knife die-cutting mechanism comprises a circular knife die-cutting roller, and a cutting circular knife is installed around the circumference of the circular knife die-cutting roller, and the flexible circuit board is divided into circuit board strips by the rotation of the cutting circular knife; characterized in that: It also includes a cutting control structure (1) and a conveying mechanism, and the circuit board strips thereon are conveyed to the cutting control structure (1) by the conveying mechanism; The cutting control structure (1) comprises a material discharging control mechanism (2), a cutting conveying mechanism (3) being fixedly mounted inside the material discharging control mechanism (2); wherein the cutting conveying mechanism (3) comprises a horizontal conveying assembly (4), a cutting assembly (5) being mounted below the horizontal conveying assembly (4); The horizontal conveying assembly (4) comprises a horizontal discharge chamber (401), and a conveying roller (402) is rotatably arranged on one side of the horizontal discharge chamber (401) close to the conveying mechanism, and horizontal conveying of the cut circuit board strips is achieved by controlling the rotation of the conveying roller (402); The cutting assembly (5) comprises a cutting bearing part installed inside the horizontal discharge cavity (401) and capable of elastically resetting upward and downward, a vertically arranged cutting notch (501) is provided on the surface of the cutting bearing part, and a cutting knife (502) adapted to the cutting notch (501) is provided directly below the cutting bearing part, and when the cutting bearing part moves downward, the cutting knife (502) is driven to move upward synchronously; The material discharging control mechanism (2) comprises a material discharging power assembly (6), and a meshing control assembly (7) is slidably mounted inside the material discharging power assembly (6); wherein the material discharging power assembly (6) comprises a rotatably mounted material discharging plate (601), a mounting cavity (602) adapted to the cutting bearing portion is provided on the surface of the material discharging plate (601), the material discharging plate (601) is clearance-fitted inside the horizontal material discharging cavity (401), and a cutting pushing roller (603) capable of reciprocating up and down is arranged directly above the mounting cavity (602); The meshing control assembly (7) comprises a first meshing portion (701) and a second meshing portion (702), wherein the first meshing portion (701) is used to control the rotation of the discharge plate (601), and the second meshing portion (702) is used to control the rotation of the conveying roller (402), and the cutting and pushing roller (603) is controlled to move downward to push the cutting and pushing bearing portion downward to achieve cooperation with the cutting knife (502) to complete the cutting of the circuit board strips, and after the cutting and pushing roller (603) moves upward and resets, it continues to be driven to move downward until it is close to the cutting and pushing bearing portion, and then in the process of controlling the cutting and pushing roller (603) to move upward, the discharge plate (601) is driven to rotate a certain angle through the first meshing portion (701) that moves upward, so that the circuit board strips cut on the discharge plate (601) slide downward and fall off the discharge plate (601); The discharging power assembly (6) further comprises a fixed frame (604), a discharging control shaft (605) being rotatably arranged inside the fixed frame (604), the discharging plate (601) being fixedly mounted on the peripheral side surface of the discharging control shaft (605), the peripheral side surface of the discharging control shaft (605) being fixedly mounted with positioning plates (606) which are attached to both sides of the discharging plate (601), a discharging gear (607) being fixedly mounted on one end of the discharging control shaft (605), and a reset gear (608) being fixedly mounted on the other end of the discharging control shaft (605); A first mounting plate is fixedly provided on one side of the fixed frame (604) opposite to the discharge gear (607); a third meshing portion (609) slidably connected to the fixed frame (604) is provided below the first mounting plate; the third meshing portion (609) meshes with the reset gear (608); a first elastic member (610) is provided between the third meshing portion (609) and the first mounting plate; A vertically arranged hydraulic cylinder (611) is installed on the top of the fixed frame (604); an output end of the hydraulic cylinder (611) is connected to a lifting connection frame (612); the cutting and pushing roller (603) is fixedly installed on the bottom of the lifting connection frame (612); two T-shaped support frames (613) are symmetrically fixedly arranged on one side of the fixed frame (604) close to the conveying mechanism; a first guide frame (614) extending downward is fixedly arranged on the T-shaped support frame (613) corresponding to the reset gear (608); The meshing control assembly (7) further comprises an annular mounting seat (703) corresponding one-to-one to the T-shaped support frame (613); a first fixing plate (705) extending downward is fixedly arranged on the surface of the annular mounting seat (703) corresponding to the discharge gear (607); a second guide frame (706) is fixedly arranged on the bottom of the first fixing plate (705); The horizontal conveying assembly (4) further comprises a horizontal conveying platform (403), and support parts (406) are fixedly arranged on opposite sides of the horizontal conveying platform (403); The cutting assembly (5) further comprises a second rotating shaft (503) rotatably arranged between two T-shaped support frames (613); a guide roller (504) is fixedly sleeved on the peripheral side of the second rotating shaft (503); a counterweight roller (505) is arranged directly below the cutting bearing portion; the cutting knife (502) is fixedly mounted on the peripheral side of the counterweight roller (505); the counterweight roller (505) and the two guide rollers (504) above it are connected via a transmission belt (506); the top of the transmission belt (506) is arranged in close contact with the bottom of the discharge plate (601); a fixed shaft (507) is arranged directly below the cutting bearing portion; the counterweight roller (505) is fixedly sleeved on the peripheral side of the fixed shaft (507); both ends of the fixed shaft (507) are fixedly provided with limiting portions (508); the first guide frame (614) and the second guide frame (706) are both slidably matched with the corresponding limiting portions (508); The cutting bearing portion includes a first bearing member (509) which is fitted on the top of the conveyor belt (506); a horizontal extension cavity which is connected to the installation cavity (602) is provided at the bottom of the discharge plate (601); the first bearing member (509) is slidably fitted inside the horizontal extension cavity; a second bearing member (510) is fixedly provided on the top of the first bearing member (509); the cutting opening (501) is provided between the first bearing member (509) and the second bearing member (510); the second bearing member (510) has two opposite sides which are arranged to form a third curved surface structure which is coaxial with the support portion (406); the two opposite side walls of the installation cavity (602) are arranged to form a fourth curved surface structure which is compatible with the third curved surface structure; a limiting guide opening (511) is provided on the top of the conveyor belt (506); and a limiting guide plate (512) which is plugged into the limiting guide opening (511) is fixedly provided on the bottom of the first bearing member (509).

2. A circular knife die cutting control system for circuit board processing according to claim 1, characterized in that: The annular mounting seat (703) is slidably mounted on the corresponding T-shaped support frame (613), and a horizontal support rod (704) is fixedly arranged between the two annular mounting seats (703). The lifting connection frame (612) is fixedly mounted on the horizontal support rod (704). A second fixing plate (707) extending horizontally is fixedly arranged on the surface of the annular mounting seat (703) corresponding to the reset gear (608), and a first L-shaped seat (708) extending downward is fixedly arranged on one side of the second fixing plate (707).

3. A circular knife die cutting control system for circuit board processing according to claim 2, characterized in that: A second L-shaped seat (709) extending horizontally is fixedly connected to one side of the second guide frame (706) via a support plate, a first limiting groove (710) is provided at the bottom of the second L-shaped seat (709), a first moving member (711) slidably connected to the first limiting groove (710) is arranged inside the second L-shaped seat (709), a vertically arranged discharging control tooth plate (712) is fixedly arranged on one side of the first moving member (711), a third L-shaped seat (713) is fixedly arranged on one side of the second L-shaped seat (709), the third L-shaped seat (713) is connected to the first moving member (711) via a second elastic member (714), and a first electromagnet installed on the inner wall of the second L-shaped seat (709) and a first permanent magnet installed on the first moving member (711) magnetically repel each other.

4. A circular knife die cutting control system for circuit board processing according to claim 3, characterized in that: A second limiting groove (715) is provided at the bottom of the first L-shaped seat (708); a second moving member (716) slidably connected to the second limiting groove (715) is provided inside the first L-shaped seat (708); a conveying control tooth plate (717) is fixedly provided on one side of the second moving member (716); a second mounting plate is fixedly provided on the inner wall of the first L-shaped seat (708); a moving rod (718) fixedly connected to the second moving member (716) is slidably provided on the second mounting plate; a connecting disk fixed at the end of the moving rod (718) is connected to the second mounting plate via a third elastic member (719); and a second electromagnet installed on the second mounting plate is magnetically attracted to a second permanent magnet installed on the second moving member (716).

5. A circular knife die cutting control system for circuit board processing according to claim 4, characterized in that: The horizontal discharge cavity (401) is opened on the top of the horizontal conveying platform (403); a first rotating shaft (404) is rotatably arranged on the top of the horizontal conveying platform (403) through an ear seat; the conveying roller (402) is fixedly sleeved on the peripheral side of the first rotating shaft (404); a conveying control gear (405) is fixedly installed on one end of the first rotating shaft (404); the support part (406) is fixedly arranged on the inner wall of the fixed frame (604); and the discharge control shaft (605) is rotatably arranged between the two support parts (406); The inner wall of the horizontal discharge cavity (401) is provided with a positioning groove (407) coaxial with the support portion (406); the positioning plate (606) is rotatably arranged inside the corresponding positioning groove (407); a device mounting frame (408) is fixedly arranged on the side of the top of the horizontal conveying platform (403) away from the conveying roller (402); a signal sensing device is installed on the top of the device mounting frame (408); both ends of the discharge plate (601) are arranged to form a first curved surface structure coaxial with the support portion (406); and the opposite side walls of the horizontal discharge cavity (401) are arranged to form a second curved surface structure adapted to the first curved surface structure.

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