CN112689393B - Production process of high-density printed circuit board - Google Patents
Production process of high-density printed circuit board Download PDFInfo
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- CN112689393B CN112689393B CN202011505732.8A CN202011505732A CN112689393B CN 112689393 B CN112689393 B CN 112689393B CN 202011505732 A CN202011505732 A CN 202011505732A CN 112689393 B CN112689393 B CN 112689393B
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Abstract
The invention discloses a production process of a high-density printed circuit board, which belongs to the technical field of circuit board processing, and comprises a bottom plate, wherein a conveying device is fixedly arranged at the top of the bottom plate, a positioning device is arranged in the middle of the top of the bottom plate and positioned above the conveying device, a polishing device is arranged above the top of the positioning device, and a blanking device is arranged on the right side of the positioning device; according to the invention, the circuit board can be conveyed onto the bearing plate and then completely fixed through the movement of the conveying device and the polishing device, so that the circuit board cannot shake in the polishing process, the excessive fillers on the surface of the circuit board can be ensured to be more completely contacted with the polishing belt, the fillers can be completely removed, and meanwhile, the processing quality of the circuit board can be ensured.
Description
Technical Field
The invention relates to the technical field of circuit board processing, in particular to a production process of a high-density printed circuit board.
Background
The volume of electronic products tends to be light, thin, short and small, and direct hole stacking on blind holes is a design method for obtaining high-density interconnection. The blind hole in the circuit board is mainly used for realizing the conduction between two layers, and the filling effect is mainly used for not influencing the subsequent welding and the processing of high-order overlapped holes. Meanwhile, because the surface of the component is required to be flat, blind holes in the component mounting position are generally filled and leveled.
The prior art discloses an invention patent in the technical field of part of circuit board processing, wherein the invention patent with the application number of CN202010219175.7 discloses a blind hole filling process and a grinding device for a high-density interconnection printed circuit board, and the process comprises the following steps of S1: plating a layer of copper on the inner wall of the blind hole; step S2: manufacturing a connecting plate for filling holes, wherein the positions of the through holes on the connecting plate correspond to the positions of the blind holes; step S3: the connecting plate is aligned and fixed on the circuit board; step S4: filling resin in the through holes and the blind holes; step S5: drying and curing the resin; step S6: polishing to make the surface of the circuit board smooth; step S7: and plating copper on the surface of the circuit board.
The in-process that prior art was conveyed on the conveyer belt is accomplished when polishing the processing to the circuit board after filling, the in-process circuit board can't be fixed polishing, can lead to the circuit board to take place to skid when polishing, and the drive belt has certain elasticity, so can take place very big deviation when polishing in-process grinding mechanism and circuit board surface contact, can lead to the filler on circuit board surface can't obtain complete getting rid of, influence the effect of polishing, serious can damage the circuit board and make the circuit board can't use.
Based on the above, the invention designs a production process of a high-density printed circuit board to solve the above problems.
Disclosure of Invention
The invention aims to provide a production process of a high-density printed circuit board, which aims to solve the problems that the prior art proposed in the background art finishes the polishing treatment of the filled circuit board in the process of conveying the circuit board on a conveying belt, the circuit board cannot be fixed in the polishing process, the circuit board can slip in the polishing process, and the conveying belt has certain elasticity, so that a great deviation can occur when a grinding mechanism is contacted with the surface of the circuit board in the polishing process, the fillers on the surface of the circuit board cannot be completely removed, the polishing effect is influenced, and the circuit board can be seriously damaged, so that the circuit board cannot be used.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of a high-density printed circuit board comprises the following steps:
the method comprises the following steps: placing the filled and dried circuit board on the surface of a conveying device of a circuit board processing mechanism, wherein the conveying device can convey the circuit board to a positioning device to stably place the circuit board;
step two: starting the polishing device to move downwards to polish the circuit board, and matching the polishing device with the positioning device in the downward movement process of the polishing device to completely fix the circuit board;
step three: when the polishing device moves upwards after polishing, the polishing device can be matched with the blanking device, and the blanking device can convey the circuit board polished on the positioning device to the surface of the conveying device;
step four: the transmission device outputs and then collects the ground circuit board;
the circuit board processing mechanism comprises a base plate, a conveying device is fixedly arranged at the top of the base plate and used for conveying a circuit board, a positioning device used for clamping and positioning four sides of the circuit board is arranged in the middle of the top of the base plate and located above the conveying device, the positioning device is used for stabilizing the circuit board, a polishing device is arranged above the top of the positioning device and used for polishing the stabilized circuit board, a blanking device is arranged on the right side of the positioning device and used for outputting the circuit board polished on the positioning device;
the conveying device comprises two first conveying rollers, the two first conveying rollers are respectively rotatably connected to the left side and the right side of the top of the bottom plate, a first conveying belt is connected to the outer walls of the two first conveying rollers in a common transmission mode, a first motor is fixedly connected to the right side of the top of the bottom plate, an output shaft of the first motor is fixedly connected with the first conveying rollers on the right side, a plurality of first mounting plates distributed in an array mode are fixedly connected to the outer walls of the first conveying belts, a first push plate is rotatably connected to the outer walls of the first mounting plates, torsion springs are symmetrically and fixedly connected to the front outer wall and the rear outer wall of the first push plate, one ends, far away from the first push plate, of the torsion springs are fixedly connected with the first mounting plates, and input guide plates are symmetrically arranged on the outer portions of the front side and the rear side of the first conveying belt;
the polishing device comprises two L-shaped mounting plates, the two L-shaped mounting plates are respectively fixedly connected to the front side and the rear side of the top of the bottom plate, the two L-shaped mounting plates are respectively positioned on the outer sides of the front side wall and the rear side wall of the first conveying belt, the top of the two L-shaped mounting plates is fixedly connected with a second mounting plate, the front side and the rear side of the second mounting plate are symmetrically and slidably connected with third mounting plates in the up-down direction, the top of the inner wall of the two third mounting plates is fixedly connected with a connecting plate, the top of the connecting plate is fixedly connected with an electric telescopic rod, the top end of the electric telescopic rod is fixedly connected with the bottom surface of the top of the second mounting plate, the left side and the right side of the inner wall of the third mounting plate are both fixedly connected with first rotating rods, the outer walls of the two first rotating rods are jointly and drivingly connected with a polishing belt, and the outer wall of the third mounting plate positioned on the front side is fixedly connected with a second motor, an output shaft of the second motor is fixedly connected with the first rotating rod on the right side;
the positioning device comprises two first push rods, the first push rods are slidably connected to the front and rear side walls of the first mounting plate, the bottom of each first push rod is fixedly connected with a first gas spring, the bottom end of each first gas spring is fixedly connected with the first mounting plate, the two L-shaped mounting plates are fixedly connected with a bearing plate together, the two input guide plates are fixedly connected to the front and rear sides of the left side wall of the bearing plate respectively, the front and rear ends of the left side wall of the bearing plate are symmetrically and slidably connected with first stabilizing plates capable of sliding forwards and backwards, the side wall of the first stabilizing plate, which is far away from the bearing plate, is fixedly connected with a first spring, one end of the first spring, which is close to the bearing plate, is fixedly connected with the outer wall of the bearing plate, the left side wall of the third mounting plate is fixedly connected with a second push rod, the bottom surface of the second push rod is attached to the outer side wall of the first stabilizing plate and can interact with the first stabilizing plate, the front end and the rear end of the left side of the top of the bearing plate are symmetrically provided with first sliding grooves, the inner wall of the first sliding groove is connected with a first clamping plate which slides forwards and backwards in a sliding manner, the front end and the rear end of the right side of the top of the bearing plate are symmetrically provided with second sliding grooves, the inner wall of the second sliding groove is connected with a second clamping plate which slides forwards and backwards in a sliding manner, the bottoms of the first clamping plate and the second clamping plate are jointly and fixedly connected with a Z-shaped slideway, the Z-shaped slideway and the bottom of the bearing plate are connected with each other in a sliding manner in the front and rear directions, the Z-shaped slideway is arranged below the bearing plate and is symmetrically provided with third sliding grooves in the front and rear directions, the inner wall of the third sliding groove is connected with a first sliding block, the first sliding block is arranged in the Z-shaped slideway and is connected with the Z-shaped sliding grooves in a sliding manner, a second spring is fixedly connected to the right side wall of the first sliding block, the second spring is located in the third sliding groove and is fixedly connected with the right side of the inner wall of the third sliding groove, the right side wall of the bearing plate is connected with a second stabilizing plate in a sliding mode in the vertical direction, the front side and the rear side of the top of the second stabilizing plate are symmetrically and fixedly connected with third springs, and the top ends of the third springs are fixedly connected with the bearing plate;
when the polishing machine works, the prior art finishes the polishing treatment of the filled circuit board in the process of conveying the circuit board on the conveying belt, the circuit board cannot be accurately positioned in the polishing process, the position of the circuit board can be moved in the polishing process, and the conveying belt has certain elasticity, so that a large position deviation can occur when a grinding mechanism is contacted with the surface of the circuit board in the polishing process, the fillers on the surface of the circuit board cannot be completely removed, the polishing effect is influenced, the circuit board can be seriously damaged, and the circuit board cannot be used, and the technical scheme solves the problems. The first conveyor belt can drive the circuit board to move rightwards together, when the right side wall of the circuit board is contacted with the inclined surface of the input guide plate, the circuit board can slide upwards along the inclined surface of the input guide plate, the circuit board can completely move onto the bearing plate under the pushing action of the first push plate, and the right side wall of the circuit board is attached to the left side wall of the second stabilizing plate, at the moment, the electric telescopic rod is started to carry out polishing operation, the electric telescopic rod extends to drive the connecting plate to move downwards, the connecting plate can drive the two third mounting plates to slide downwards, the third mounting plates can drive the second push rod to synchronously move downwards while moving downwards, the second push rod can push the first stabilizing plate to move towards the center direction of the bearing plate, the first stabilizing plates on the two sides can clamp and position the left side of the circuit board, so that the position of the circuit board in the left and right directions is limited, the first push plate can turn over and simultaneously twist the torsion spring under the action of the bearing plate, so that the first push plate can smoothly pass through the lower part of the bearing plate, when the first mounting plate drives the first push rod to move rightwards to be contacted with the first slide block, the first push rod can act on the first slide block to drive the first slide block to slide in the third slide groove and simultaneously compress the second spring, the first slide block can also slide rightwards in the Z-shaped slide groove, the first slide block can drive the first clamping plate and the second clamping plate on two sides to slide towards the middle position of the bearing plate simultaneously through the Z-shaped slide way, the first clamping plate and the second clamping plate can clamp and position the front side and the rear side of the circuit board by matching with the second stabilizing plate, the position of the circuit board on the bearing plate is completely limited, at the moment, the grinding belt can be contacted with the surface of the circuit board for grinding, the invention can convey the circuit board onto the bearing plate by the conveying action of the first conveyor belt and simultaneously limit the right side of the circuit board, then it can make two first stabilising plates move in opposite directions and carry on spacingly to the left side of circuit board to be close to the circuit board through the area of polishing, it can make first clamp plate and second clamp plate press from both sides tightly to the front and back both sides of circuit board simultaneously to drive first mounting panel motion through first conveyer belt simultaneously, can make the circuit board injectd completely on the position of polishing on the loading board, can make the circuit board can not take place to rock at the in-process of polishing, can guarantee that the unnecessary filler in circuit board surface can with polish more complete of area contact, can make the filler can obtain complete getting rid of, guarantee the quality of circuit board processing.
As a further scheme of the invention, the blanking device comprises a loading plate, wherein the inner walls of the front side and the rear side of the loading plate are jointly and rotatably connected with an output roller, the front end of the output roller is fixedly connected with a driven gear, the driven gear is positioned on the outer side of the front part of the loading plate, an arc-shaped chute is formed in the outer wall of the front part of the loading plate, a first rotating rod is slidably connected in the arc-shaped chute, the outer wall of the first rotating rod is fixedly connected with an idle wheel, the idle wheel is the left side of the driven gear and is meshed with the driven gear, the outer wall of the front part of the loading plate is rotatably connected with a driving gear, the driving gear is positioned on the left side of the idle wheel and is meshed with the idle wheel, the outer wall of the third mounting plate positioned on the front side is fixedly connected with a rack rod, the rack rod is meshed with the driving gear, and right-angle trapezoid push plates are symmetrically and fixedly connected on the front side and rear side of the bottom of the loading plate, the front side and the rear side of the bottom of the second stabilizing plate are symmetrically and fixedly connected with a second push plate, the second push plate comprises a rectangular block and a triangular block, the height of the triangular block is lower than that of the rectangular block, the first push rod can interact with the triangular block, the front side and the rear side of the top of the bottom plate are symmetrically and fixedly connected with fifth mounting plates, the top of the fifth mounting plate is fixedly connected with an output guide plate, the output guide plate is positioned on the right side of the second stabilizing plate, the inner walls of the two fifth mounting plates are jointly and rotatably connected with a second conveying roller, the second conveying roller is in transmission connection with the first conveying belt, the outer wall of the second conveying roller is fixedly connected with a first belt pulley, the first belt pulley is positioned on the outer side of the fifth mounting plate, the top of the output guide plate is provided with a mounting groove, and the left side and the right side in the mounting groove are symmetrically and rotatably connected with a third conveying roller, a second belt pulley is fixedly connected to the outer wall of the third conveying roller on the left side, the second belt pulley is located on the outer side of the output guide plate, and the second belt pulley and the outer wall of the first belt pulley are jointly in transmission connection with an output conveying belt; when the electric telescopic handle is in contact with the inclined plane of the triangular block, the first push rod can drive the second push plate to move downwards, the second push plate can drive the second stabilizing plate to move downwards together and stretch the second spring, at the moment, the second stabilizing plate does not play a limiting role on the right side wall of the circuit board, and the electric telescopic handle can drive the connecting plate, The third mounting plate and the polishing belt move upwards, the third mounting plate can drive the rack rod to synchronously move upwards, the rack rod can drive the driving gear to rotate, the driving gear can drive the driven gear to rotate through the idler, the driven gear can drive the output roller to rotate, the output roller can enable the circuit board to slide on the surface of the circuit board, the circuit board slides out from the right side of the bearing plate, when the circuit board falls onto the output guide plate from the bearing plate, the first transmission belt wheel can be driven to rotate through the second transmission roller, the first belt wheel can drive the third transmission roller to rotate through the second transmission belt, the third transmission roller can drive the output transmission belt to rotate, the output transmission belt can drive the circuit board on the output guide plate to move onto the first transmission belt and then be transmitted to the collection position, in the process that the polishing device drives the rack rod to move downwards, the driving gear can drive the idler to slide upwards in the arc-shaped sliding chute in a counterclockwise way, the invention can cancel the limiting effect of a second stabilizing plate on the circuit board through the process that a first push rod moves rightwards, then drive the output roller to rotate through the reset effect of the polishing device, drive the circuit board on the bearing plate to the output guide plate, then drive the output conveyor belt to rotate through the first conveyor belt, convey the circuit board falling on the output guide plate to the surface of the first conveyor belt, then the first conveyor belt can convey and collect the circuit board, can realize that the polished circuit board automatically falls onto the first conveyor belt from the bearing plate, can realize the full-automatic process of polishing and blanking of the circuit board, has simple structure and does not need to add other power elements.
As a further scheme of the invention, the top of the input guide plate is fixedly provided with an arc guide rail; during operation, through the setting of arc guide rail, can avoid the circuit board to draw the guide rail from the input when sliding on the input guide rail and drop, can also lead the circuit board to the central point of loading board from both sides simultaneously puts, can make follow-up clamping process clamp plate can need not promote the circuit board, can reduce the injury that the circuit board received.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the circuit board can be conveyed to the bearing plate by the conveying action of the first conveyor belt, the right side of the circuit board is limited, then the two first stabilizing plates can move oppositely to limit the left side of the circuit board by the grinding belt approaching the circuit board, and meanwhile, the first conveyor belt drives the first mounting plate to move, so that the first clamping plate and the second clamping plate can simultaneously clamp the front side and the rear side of the circuit board, the circuit board can be completely fixed on the bearing plate, the circuit board cannot shake in the grinding process, the situation that redundant fillers on the surface of the circuit board can be contacted with the grinding belt more completely can be ensured, the fillers can be completely removed, and meanwhile, the processing quality of the circuit board can be ensured.
2. According to the invention, the limiting effect of the second stabilizing plate on the circuit board can be cancelled in the process that the first push rod moves rightwards, then the output roller is driven to rotate through the reset effect of the polishing device, the circuit board on the loading plate can be driven to the output guide plate, then the output conveyor belt is driven to rotate through the first conveyor belt, the circuit board falling onto the output guide plate can be conveyed to the surface of the first conveyor belt, then the circuit board can be conveyed and collected by the first conveyor belt, the polished circuit board can automatically fall onto the first conveyor belt from the loading plate, the full-automatic process of polishing and blanking of the circuit board can be realized, the structure is simple, and other power elements are not required to be added.
3. According to the invention, through the arrangement of the arc guide rail, the circuit board can be prevented from falling off from the input guide rail when sliding on the input guide rail, and meanwhile, the circuit board can be guided to the central position of the bearing plate from two sides, so that the circuit board does not need to be pushed by the clamping plate in the subsequent clamping process, and the damage to the circuit board can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the process steps of the present invention;
FIG. 2 is a schematic diagram of the subject structure of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
FIG. 4 is a schematic view of a portion of the positioning device of the present invention;
FIG. 5 is a partial enlarged view of portion B of FIG. 4;
FIG. 6 is a bottom view of a portion of the positioning device of the present invention;
FIG. 7 is a schematic view of the positioning device and the polishing device of the present invention;
FIG. 8 is a schematic view of the connection of the blanking device of the present invention;
FIG. 9 is an enlarged view of a portion C of FIG. 8;
FIG. 10 is a schematic view of a second push plate according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the device comprises a bottom plate 1, a first conveying roller 2, a first conveyor belt 3, a first motor 4, a first mounting plate 5, a first push plate 6, a torsion spring 7, an input guide plate 8, an L-shaped mounting plate 9, a second mounting plate 10, a third mounting plate 11, a connecting plate 12, an electric telescopic rod 13, a first rotary rod 14, a polishing belt 15, a second motor 16, a first push rod 17, a first air spring 18, a bearing plate 19, a first stabilizing plate 20, a first spring 21, a second push rod 22, a first sliding chute 23, a first clamping plate 24, a second sliding chute 25, a second clamping plate 26, a Z-shaped sliding chute 27, a Z-shaped sliding chute 28, a third sliding chute 29, a first sliding block 30, a second spring 31, a second stabilizing plate 32, a third spring 33, an output roller 34, a driven gear 35, an arc-shaped sliding chute 36, a first rotary rod 37, an idle wheel 38, a driving gear 39, a rack rod 40, a right-angle trapezoid 41, a second push plate 42, a rectangular block 43, a push plate 43, a rectangular block 43, a first push plate 42, a second push plate, a third slide block 33, a third slide block, a third slide groove 23, a third slide groove, a second slide groove, a third slide groove, a fourth slide groove, a second slide groove, a fourth slide groove, a third slide groove, a fourth slide groove, a, A triangular block 44, a fifth mounting plate 45, an output guide plate 46, a second conveying roller 47, a first belt pulley 48, a mounting groove 49, a third conveying roller 50, a second belt pulley 51, a second conveying belt 52, an output conveying belt 53 and an arc guide rail 54.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without any creative effort are within the protection scope of the present invention.
Referring to fig. 1-10, the present invention provides a technical solution: a production process of a high-density printed circuit board comprises the following steps:
the method comprises the following steps: placing the filled and dried circuit board on the surface of a conveying device of a circuit board processing mechanism, wherein the conveying device can convey the circuit board to a positioning device to stably place the circuit board;
step two: starting the polishing device to move downwards to polish the circuit board, and matching the polishing device with the positioning device in the downward movement process of the polishing device to completely fix the circuit board;
step three: when the polishing device moves upwards after polishing, the polishing device can be matched with the blanking device, and the blanking device can convey the circuit board polished on the positioning device to the surface of the conveying device;
step four: the transmission device outputs and then collects the ground circuit board;
the circuit board processing mechanism in the first step, the second step, the third step and the fourth step comprises a bottom plate 1, a conveying device is fixedly arranged at the top of the bottom plate 1 and used for conveying a circuit board, a positioning device used for clamping and positioning four sides of the circuit board is arranged in the middle of the top of the bottom plate 1 and located above the conveying device, the positioning device is used for stabilizing the circuit board, a polishing device is arranged above the top of the positioning device and used for polishing the stabilized circuit board, a blanking device is arranged on the right side of the positioning device and used for outputting the circuit board polished on the positioning device;
the conveying device comprises two first conveying rollers 2, the two first conveying rollers 2 are respectively rotatably connected to the left side and the right side of the top of the bottom plate 1, the outer walls of the two first conveying rollers 2 are jointly connected with a first conveying belt 3 in a transmission mode, the right side of the top of the bottom plate 1 is fixedly connected with a first motor 4, an output shaft of the first motor 4 is fixedly connected with the first conveying rollers 2 on the right side, the outer wall of the first conveying belt 3 is fixedly connected with a plurality of first mounting plates 5 distributed in an array mode, the outer wall of each first mounting plate 5 is rotatably connected with a first push plate 6, torsion springs 7 are symmetrically and fixedly connected to the front outer wall and the rear outer wall of each first push plate 6, one ends, far away from the first push plates 6, of the torsion springs 7 are fixedly connected with the first mounting plates 5, and input guide plates 8 are symmetrically arranged on the outer portions of the front side and the rear side of the first conveying belt 3;
the polishing device comprises two L-shaped mounting plates 9, the two L-shaped mounting plates 9 are respectively fixedly connected to the front side and the rear side of the top of a bottom plate 1, the two L-shaped mounting plates 9 are respectively positioned on the outer sides of the front side wall and the rear side wall of a first conveyor belt 3, the top of the two L-shaped mounting plates 9 is fixedly connected with a second mounting plate 10, the front side and the rear side of the second mounting plate 10 are symmetrically and slidably connected with third mounting plates 11 in the up-down direction, the top of the inner wall of the two third mounting plates 11 is fixedly connected with a connecting plate 12, the top of the connecting plate 12 is fixedly connected with an electric telescopic rod 13, the top end of the electric telescopic rod 13 is fixedly connected with the bottom surface of the top of the second mounting plate 10, the left side and the right side of the inner wall of the third mounting plate 11 are both fixedly connected with first rotating rods 14, the outer walls of the two first rotating rods 14 are jointly and in transmission connection with a polishing belt 15, and the outer wall of the third mounting plate 11 positioned on the front side is fixedly connected with a second motor 16, the output shaft of the second motor 16 is fixedly connected with the first rotary rod 14 on the right side;
the positioning device comprises two first push rods 17, the first push rods 17 are slidably connected to the front and rear side walls of the first mounting plate 5, the bottom of the first push rods 17 is fixedly connected with first air springs 18, the bottom ends of the first air springs 18 are fixedly connected with the first mounting plate 5, the inner walls of the two L-shaped mounting plates 9 are fixedly connected with a bearing plate 19 together, the two input guide plates 8 are fixedly connected to the front and rear sides of the left side wall of the bearing plate 19 respectively, the front and rear ends of the left side wall of the bearing plate 19 are symmetrically and slidably connected with first stabilizing plates 20 capable of sliding back and forth, the side wall of the first stabilizing plate 20 far away from the bearing plate 19 is fixedly connected with a first spring 21, one end of the first spring 21 close to the bearing plate 19 is fixedly connected with the outer wall of the bearing plate 19, the left side wall of the third mounting plate 11 is fixedly connected with a second push rod 22, the bottom surface of the second push rod 22 is attached to the outer side wall of the first stabilizing plate 20 and can interact with the first stabilizing plate 20, the front end and the rear end of the left side of the top of the bearing plate 19 are symmetrically provided with first sliding grooves 23, the inner wall of the first sliding groove 23 is connected with a first clamping plate 24 which slides back and forth in a sliding way, the front end and the rear end of the right side of the top of the bearing plate 19 are symmetrically provided with second sliding grooves 25, the inner wall of the second sliding groove 25 is connected with a second clamping plate 26 which slides back and forth in a sliding way, the bottoms of the first clamping plate 24 and the second clamping plate 26 which are positioned on the same side in the front and rear directions are jointly and fixedly connected with a Z-shaped slideway 27, the Z-shaped slideway 27 is connected with the bottom of the bearing plate 19 in a sliding way in the front and rear directions, the Z-shaped slideway 27 is provided with a Z-shaped sliding groove 28 which penetrates through the top and the bottom, the Z-shaped slideway 27 is positioned below the bearing plate 19, the front and rear sides of the bottom of the bearing plate 19 are symmetrically provided with third sliding grooves 29, the inner wall of the third sliding grooves 29 is connected with a first sliding block 30, the first sliding block 30 is positioned in the Z-shaped slideway and is connected with the Z-shaped sliding way, a second spring 31 is fixedly connected to the right side wall of the first slider 30, the second spring 31 is positioned in the third sliding groove 29 and is fixedly connected with the right side of the inner wall of the third sliding groove 29, the right side wall of the bearing plate 19 is connected with a second stabilizing plate 32 in a vertical sliding mode, third springs 33 are symmetrically and fixedly connected to the front side and the rear side of the top of the second stabilizing plate 32, and the top ends of the third springs 33 are fixedly connected with the bearing plate 19;
when the polishing machine works, the prior art finishes polishing the filled circuit board in the process of conveying the circuit board on the conveying belt, the circuit board cannot be accurately positioned in the polishing process, the position of the circuit board can be moved in the polishing process, and the conveying belt has certain elasticity, so that a large position deviation can occur when a grinding mechanism is contacted with the surface of the circuit board in the polishing process, the fillers on the surface of the circuit board cannot be completely removed, the polishing effect is influenced, the circuit board can be seriously damaged, and the circuit board cannot be used, and the technical scheme solves the problems, and has the following specific working scheme that the circuit board which is filled and dried is placed on the right side of a first push plate 6 on a first conveying belt 3, a first motor 4 is started to drive the first conveying roller 2 to rotate clockwise, and the first conveying roller 2 drives the first conveying belt 3 to rotate synchronously, the first conveyor belt 3 drives the circuit board to move rightwards together, when the right side wall of the circuit board contacts with the inclined surface of the input guide plate 8, the circuit board slides upwards along the inclined surface of the input guide plate 8, the circuit board can completely move onto the bearing plate 19 under the pushing action of the first push plate 6, and the right side wall of the circuit board is attached to the left side wall of the second stabilizing plate 32, at this time, the electric telescopic rod 13 is started to perform polishing operation, the electric telescopic rod 13 extends to drive the connecting plate 12 to move downwards, the connecting plate 12 can drive the two third mounting plates 11 to slide downwards, the third mounting plates 11 can drive the second push rod 22 to synchronously move downwards while moving downwards, the second push rod 22 can push the first stabilizing plate 20 to move towards the center direction of the bearing plate 19, the first stabilizing plates 20 on both sides can clamp and position the left side of the circuit board, so that the position of the circuit board in the left and right directions is limited, then the first mounting plate 5 continues to drive the first push plate 6 to move rightwards, the first push plate 6 will turn over and twist the torsion spring 7 under the action of the bearing plate 19, so that the first push plate 6 can smoothly pass through the lower part of the bearing plate 19, when the first mounting plate 5 drives the first push rod 17 to move rightwards and contact with the first slide block 30, the first push rod 17 will act on the first slide block 30 to drive the first slide block 30 to slide in the third slide slot 29 and compress the second spring 31, the first slide block 30 will slide rightwards in the Z-shaped slide slot 28, the first slide block 30 will drive the first clamping plate 24 and the second clamping plate 26 on both sides to slide towards the middle position of the bearing plate 19 through the Z-shaped slide way 27, the first clamping plate 24 and the second clamping plate 26 cooperate with the second stabilizing plate 32 to clamp and position the front and rear sides of the circuit board, at this time, the position of the circuit board on the bearing plate 19 is completely limited, at this time, the polishing belt 15 will contact with the surface of the circuit board for polishing, the circuit board can be transferred onto the carrier plate 19 by the transfer function of the first transfer belt 3 and the right side of the circuit board is limited, the two first stabilizing plates 20 can then be moved towards each other to limit the left side of the circuit board by approaching the circuit board through the grinding belt 15, meanwhile, the first conveyor belt 3 drives the first mounting plate 5 to move, so that the first clamping plate 24 and the second clamping plate 26 can simultaneously clamp the front side and the rear side of the circuit board, the circuit board can be completely limited on the grinding position on the bearing plate 19, the circuit board can not shake in the grinding process, the redundant filler on the surface of the circuit board can be ensured to be contacted with the polishing belt more completely, the filler can be completely removed, and the processing quality of the circuit board is ensured.
As a further scheme of the invention, the blanking device comprises a bearing plate 19, wherein the inner walls of the front side and the rear side of the bearing plate 19 are jointly and rotatably connected with an output roller 34, the front end of the output roller 34 is fixedly connected with a driven gear 35, the driven gear 35 is positioned on the outer side of the front part of the bearing plate 19, the outer wall of the front part of the bearing plate 19 is provided with an arc-shaped chute 36, the arc-shaped chute 36 is slidably connected with a first rotating rod 37, the outer wall of the first rotating rod 37 is fixedly connected with an idle gear 38, the idle gear 38 is the left side of the driven gear 35 and is meshed with the driven gear 35, the outer wall of the front part of the bearing plate 19 is rotatably connected with a driving gear 39, the driving gear 39 is positioned on the left side of the idle gear 38 and is meshed with the idle gear 38, the outer wall of a third mounting plate 11 positioned on the front side is fixedly connected with a rack rod 40, the rack rod 40 is meshed with the driving gear 39, and right-angled trapezoidal push plates 41 are symmetrically and fixedly connected on the front side and rear side of the bottom of the bearing plate 19, the front side and the rear side of the bottom of the second stabilizing plate 32 are symmetrically and fixedly connected with a second push plate 42, the second push plate 42 comprises a rectangular block 43 and a triangular block 44, the height of the triangular block 44 is lower than that of the rectangular block 43, the first push rod 17 can interact with the triangular block 44, the front side and the rear side of the top of the bottom plate 1 are symmetrically and fixedly connected with fifth mounting plates 45, the top of the fifth mounting plates 45 is fixedly connected with an output guide plate 46, the output guide plate 46 is positioned at the right side of the second stabilizing plate 32, the inner walls of the two fifth mounting plates 45 are jointly and rotatably connected with second conveying rollers 47, the second conveying rollers 47 are in transmission connection with the first conveying belt 3, the outer wall of the second conveying rollers 47 is fixedly connected with a first belt pulley 48, the first belt pulley 48 is positioned at the outer side of the fifth mounting plates 45, the top of the output guide plate 46 is provided with a mounting groove 49, the left side and the right side in the mounting groove 49 are symmetrically and rotatably connected with third conveying rollers 50, a second belt pulley 51 is fixedly connected to the outer wall of the left third conveying roller 50, the second belt pulley 51 is located on the outer side of the output guide plate 46, and the outer walls of the second belt pulley 51 and the first belt pulley 48 are jointly in transmission connection with an output conveying belt 53; in operation, after the circuit board is polished, the first conveyor belt 3 drives the first mounting plate 5 to move rightward continuously, when the first mounting plate 5 drives the first push rod 17 to contact with the right trapezoid push plate 41, the first push rod 17 slides downward and compresses the first air spring 18 under the action of the inclined surface of the right trapezoid push plate 41, the first slide block 30 is staggered with the first push rod 17 due to the downward movement of the first push rod 17, the first slide block 30 moves leftward and returns to the initial position under the action of the second spring 31, at this time, the first clamping plate 24 and the second clamping plate 26 do not play a role in fixing the circuit board, the first push rod 17 continues to move rightward, when the first push rod 17 contacts with the inclined surface of the triangle block 44, the first push rod 17 drives the second push plate 42 to move downward, the second push plate 42 drives the second stabilizing plate 32 to move downward and simultaneously stretch the second spring 31, at this time, the second stabilizing plate 32 does not play a role in limiting on the right side wall of the circuit board, the electric telescopic rod 13 drives the connecting plate 12, the third mounting plate 11 and the polishing belt 15 to move upwards, the third mounting plate 11 drives the rack bar 40 to move upwards synchronously, the rack bar 40 drives the driving gear 39 to rotate, the driving gear 39 drives the driven gear 35 to rotate through the idle gear 38, the driven gear 35 drives the output roller 34 to rotate, the output roller 34 rotates to enable the circuit board to slide on the surface thereof, the circuit board slides out from the right side of the bearing plate 19, after the circuit board falls onto the output guide plate 46 from the bearing plate 19, the first transmission belt 47 drives the first belt pulley 48 to rotate, the first belt pulley 48 drives the third transmission roller 50 to rotate through the second transmission belt 52, the third transmission roller 50 drives the output transmission belt 53 to rotate, the output transmission belt 53 drives the circuit board on the output guide plate 46 to move onto the first transmission belt 3, then the circuit board is conveyed to a collecting position, in the process that the grinding device drives the rack bar 40 to move downwards, the driving gear 39 rotates anticlockwise to drive the idle gear 38 to slide upwards in the arc-shaped chute 36, at the moment, the idle gear 38 does not act on the driven gear 35, the driven gear 35 can be prevented from rotating to drive the output roller 34 to rotate, the invention can cancel the limiting effect of the second stabilizing plate 32 on the circuit board in the process of moving towards the right through the first push rod 17, then the output roller 34 is driven to rotate through the resetting effect of the grinding device, the circuit board on the bearing plate 19 can be driven to the output guide plate 46, then the output conveyor belt 53 is driven to rotate through the first conveyor belt, the circuit board falling onto the output guide plate 46 can be conveyed to the surface of the first conveyor belt 3, then the first conveyor belt 3 can convey and collect the circuit board, and the ground circuit board can automatically fall onto the first conveyor belt 3 from the bearing plate 19, the full-automatic process of circuit board grinding and blanking can be realized, and the structure is simple without adding other power elements.
As a further aspect of the present invention, an arc guide rail 54 is fixedly provided on the top of the input guide plate 8; during operation, through the setting of arc guide rail 54, can avoid the circuit board to drop from the input guide rail when sliding on the input guide rail, can also lead the circuit board to the central point of loading board 19 from both sides simultaneously, can make follow-up clamping process pinch-off blades can need not promote the circuit board, can reduce the injury that the circuit board received.
The working principle is as follows: when the polishing machine works, the prior art finishes polishing the filled circuit board in the process of conveying the circuit board on the conveying belt, the circuit board cannot be accurately positioned in the polishing process, the position of the circuit board can be moved in the polishing process, and the conveying belt has certain elasticity, so that a large position deviation can occur when a grinding mechanism is contacted with the surface of the circuit board in the polishing process, the fillers on the surface of the circuit board cannot be completely removed, the polishing effect is influenced, the circuit board can be seriously damaged, and the circuit board cannot be used, and the technical scheme solves the problems, and has the following specific working scheme that the circuit board which is filled and dried is placed on the right side of a first push plate 6 on a first conveying belt 3, a first motor 4 is started to drive the first conveying roller 2 to rotate clockwise, and the first conveying roller 2 drives the first conveying belt 3 to rotate synchronously, the first conveyor belt 3 drives the circuit board to move rightwards together, when the right side wall of the circuit board contacts with the inclined surface of the input guide plate 8, the circuit board slides upwards along the inclined surface of the input guide plate 8, the circuit board can completely move onto the bearing plate 19 under the pushing action of the first push plate 6, and the right side wall of the circuit board is attached to the left side wall of the second stabilizing plate 32, at this time, the electric telescopic rod 13 is started to perform polishing operation, the electric telescopic rod 13 extends to drive the connecting plate 12 to move downwards, the connecting plate 12 can drive the two third mounting plates 11 to slide downwards, the third mounting plates 11 can drive the second push rod 22 to synchronously move downwards while moving downwards, the second push rod 22 can push the first stabilizing plate 20 to move towards the center direction of the bearing plate 19, the first stabilizing plates 20 on both sides can clamp and position the left side of the circuit board, so that the position of the circuit board in the left and right directions is limited, then the first mounting plate 5 continues to drive the first push plate 6 to move rightwards, the first push plate 6 will turn over and twist the torsion spring 7 under the action of the bearing plate 19, so that the first push plate 6 can smoothly pass through the lower part of the bearing plate 19, when the first mounting plate 5 drives the first push rod 17 to move rightwards and contact with the first slide block 30, the first push rod 17 will act on the first slide block 30 to drive the first slide block 30 to slide in the third slide slot 29 and compress the second spring 31, the first slide block 30 will slide rightwards in the Z-shaped slide slot 28, the first slide block 30 will drive the first clamping plate 24 and the second clamping plate 26 on both sides to slide towards the middle position of the bearing plate 19 through the Z-shaped slide way 27, the first clamping plate 24 and the second clamping plate 26 cooperate with the second stabilizing plate 32 to clamp and position the front and rear sides of the circuit board, at this time, the position of the circuit board on the bearing plate 19 is completely limited, at this time, the polishing belt 15 will contact with the surface of the circuit board for polishing, the circuit board can be transferred onto the carrier plate 19 by the transfer function of the first transfer belt 3 and the right side of the circuit board is limited, the two first stabilizing plates 20 can then be moved towards each other to limit the left side of the circuit board by approaching the circuit board through the grinding belt 15, meanwhile, the first conveyor belt 3 drives the first mounting plate 5 to move, so that the first clamping plate 24 and the second clamping plate 26 can simultaneously clamp the front side and the rear side of the circuit board, the circuit board can be completely limited on the grinding position on the bearing plate 19, the circuit board can not shake in the grinding process, the redundant filler on the surface of the circuit board can be ensured to be contacted with the polishing belt more completely, the filler can be completely removed, and the processing quality of the circuit board is ensured.
In the description herein, references to the terms "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic table of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended merely to assist in the explanation of the invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. A production process of a high-density printed circuit board is characterized by comprising the following steps: the production process of the circuit board comprises the following steps:
the method comprises the following steps: placing the filled and dried circuit board on the surface of a conveying device of the circuit board processing equipment, wherein the conveying device can convey the circuit board to a positioning device to stably place the circuit board;
step two: starting the polishing device to move downwards to polish the circuit board, and matching the polishing device with the positioning device in the downward movement process of the polishing device to completely fix the circuit board;
step three: when the polishing device moves upwards after polishing, the polishing device can be matched with the blanking device, and the blanking device can convey the circuit board polished on the positioning device to the surface of the conveying device;
step four: the transmission device outputs and then collects the ground circuit board;
the circuit board processing mechanism comprises a base plate (1), a conveying device is fixedly arranged at the top of the base plate (1) and used for conveying a circuit board, a positioning device used for clamping and positioning four sides of the circuit board is arranged in the middle of the top of the base plate (1), the positioning device is located above the conveying device and used for stabilizing the circuit board, a polishing device is arranged above the top of the positioning device and used for polishing the stabilized circuit board, a blanking device is arranged on the right side of the positioning device and used for outputting the circuit board polished on the positioning device;
the conveying device comprises two first conveying rollers (2), the two first conveying rollers (2) are respectively and rotatably connected to the left side and the right side of the top of a bottom plate (1), the outer walls of the two first conveying rollers (2) are jointly in transmission connection with a first conveying belt (3), the right side of the top of the bottom plate (1) is fixedly connected with a first motor (4), an output shaft of the first motor (4) is fixedly connected with the first conveying rollers (2) on the right side, the outer wall of the first conveying belt (3) is fixedly connected with a plurality of first mounting plates (5) distributed in an array manner, the outer wall of each first mounting plate (5) is rotatably connected with a first push plate (6), torsion springs (7) are symmetrically and fixedly connected to the front outer wall and the rear outer wall of each first push plate (6), and one ends, far away from the first push plates (6), of the torsion springs (7) are fixedly connected with the first mounting plates (5), the outer parts of the front side and the rear side of the first conveyor belt (3) are symmetrically provided with input guide plates (8);
the polishing device comprises two L-shaped mounting plates (9), wherein the two L-shaped mounting plates (9) are fixedly connected to the front side and the rear side of the top of a bottom plate (1) respectively, the two L-shaped mounting plates (9) are positioned on the outer sides of the front side wall and the rear side wall of a first conveyor belt (3) respectively, the top of each L-shaped mounting plate (9) is fixedly connected with a second mounting plate (10), the front side and the rear side of each second mounting plate (10) are symmetrically and slidably connected with third mounting plates (11) in the up-down direction, the top of the inner wall of each third mounting plate (11) is fixedly connected with a connecting plate (12), the top of each connecting plate (12) is fixedly connected with an electric telescopic rod (13), the top end of each electric telescopic rod (13) is fixedly connected with the bottom surface of the top of each second mounting plate (10), and the left side and the right side of the inner wall of each third mounting plate (11) are fixedly connected with a first rotary rod (14), the outer walls of the two first rotating rollers (14) are jointly connected with a grinding belt (15) in a transmission mode, the outer wall of the third mounting plate (11) located on the front side is fixedly connected with a second motor (16), and an output shaft of the second motor (16) is fixedly connected with the first rotating roller (14) located on the right side;
the positioning device comprises two first push rods (17), the first push rods (17) are connected to the front side wall and the rear side wall of a first mounting plate (5) in a sliding manner, the bottom of each first push rod (17) is fixedly connected with a first gas spring (18), the bottom end of each first gas spring (18) is fixedly connected with the first mounting plate (5), the two L-shaped mounting plates (9) are fixedly connected with a bearing plate (19) together on the inner wall, two input guide plates (8) are respectively fixedly connected to the front side wall and the rear side wall of the bearing plate (19), first stabilizing plates (20) capable of sliding back and forth are symmetrically and slidably connected to the front ends and the rear ends of the left side wall of the bearing plate (19), the first stabilizing plates (20) are fixedly connected to the side wall of one side far away from the bearing plate (19), the first springs (21) are close to one end of the bearing plate (19) and fixedly connected with the outer wall of the bearing plate (19), fixedly connected with second push rod (22) on the left side wall of third mounting panel (11), the bottom surface of second push rod (22) and the lateral wall laminating of first steadying plate (20) and can with first steadying plate (20) interact, first spout (23) have been seted up to both ends symmetry around the top left side of loading board (19), sliding connection has gliding first clamp plate (24) around on first spout (23) inner wall, second spout (25) have been seted up to both ends symmetry around the top right side of loading board (19), sliding connection has gliding second clamp plate (26) around on second spout (25) inner wall, lie in the same side on the front and back direction the common fixedly connected with Z shape slide (27) in bottom of first clamp plate (24) and second clamp plate (26), sliding connection is gone up with the bottom of loading board (19) in the front and back direction in Z shape slide (27), the Z-shaped slide way (27) is provided with a Z-shaped slide groove (28) penetrating through the top bottom, the Z-shaped slide way (27) is positioned below the bearing plate (19), third slide grooves (29) are symmetrically arranged on the front side and the rear side of the bottom of the bearing plate (19), a first sliding block (30) is connected to the inner wall of the third slide groove (29) in a sliding manner, the first sliding block (30) is positioned in the Z-shaped slide way and is connected with the Z-shaped slide groove in a sliding manner, a second spring (31) is fixedly connected to the right side wall of the first sliding block (30), the second spring (31) is positioned in the third slide groove (29) and is fixedly connected with the right side of the inner wall of the third slide groove (29), the right side wall of the bearing plate (19) is connected with a second stabilizing plate (32) in an upper and lower direction in a sliding manner, and third springs (33) are fixedly connected on the front side and the rear side of the top of the second stabilizing plate (32) in a symmetrical manner, the top end of the third spring (33) is fixedly connected with the bearing plate (19).
2. The process for producing a high-density printed circuit board according to claim 1, wherein: the blanking device comprises a bearing plate (19), wherein an output roller (34) is connected to the inner walls of the front side and the rear side of the bearing plate (19) in a rotating mode, a driven gear (35) is fixedly connected to the front end of the output roller (34), the driven gear (35) is located on the outer side of the front portion of the bearing plate (19), an arc-shaped sliding groove (36) is formed in the outer wall of the front portion of the bearing plate (19), a first rotating rod (37) is connected to the arc-shaped sliding groove (36) in a sliding mode, an idler gear (38) is fixedly connected to the outer wall of the first rotating rod (37), the idler gear (38) is the left side of the driven gear (35) and meshed with the driven gear (35), a driving gear (39) is rotatably connected to the outer wall of the front portion of the bearing plate (19), the driving gear (39) is located on the left side of the idler gear (38) and meshed with the idler gear (38), and a rack rod (40) is fixedly connected to the outer wall of the third mounting plate (11) located on the front side, the rack bar (40) is meshed with the driving gear (39), the front side and the rear side of the bottom of the bearing plate (19) are symmetrically and fixedly connected with right trapezoid push plates (41), the front side and the rear side of the bottom of the second stabilizing plate (32) are symmetrically and fixedly connected with second push plates (42), the second push plates (42) comprise rectangular blocks (43) and triangular blocks (44), the height of the triangular blocks (44) is lower than that of the rectangular blocks (43), the first push rods (17) can interact with the triangular blocks (44), the front side and the rear side of the top of the bottom plate (1) are symmetrically and fixedly connected with fifth mounting plates (45), the top of the fifth mounting plates (45) is fixedly connected with an output guide plate (46), the output guide plate (46) is positioned on the right side of the second stabilizing plate (32), and the inner walls of the fifth mounting plates (45) are connected with second conveying rollers (47) in a rotating mode, second transfer roller (47) is connected with first transfer belt (3) transmission, fixedly connected with first belt pulley (48) on the outer wall of second transfer roller (47), first belt pulley (48) are located the outside of fifth mounting panel (45), mounting groove (49) have been seted up at the top of output guide board (46), left and right sides symmetry rotation is connected with third transfer roller (50) in mounting groove (49), is located the left side fixedly connected with second belt pulley (51) on the outer wall of third transfer roller (50), second belt pulley (51) are located the outside of output guide board (46), common transmission is connected with second conveyer belt (52) on first belt pulley (48) and second belt pulley (51) outer wall, two common transmission is connected with output conveyer belt (53) on the outer wall of third transfer roller (50).
3. The process for producing a high-density printed circuit board according to claim 1, wherein: and an arc guide rail (54) is fixedly arranged at the top of the input guide plate (8).
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| CN202011505732.8A CN112689393B (en) | 2020-12-18 | 2020-12-18 | Production process of high-density printed circuit board |
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| CN202011505732.8A CN112689393B (en) | 2020-12-18 | 2020-12-18 | Production process of high-density printed circuit board |
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| CN112689393B true CN112689393B (en) | 2021-09-03 |
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| CN113543491B (en) * | 2021-07-09 | 2022-09-09 | 吉安满坤科技股份有限公司 | Machining device for improving flatness of metal plate |
| CN113441860B (en) * | 2021-07-22 | 2022-08-02 | 合肥哈工汽车智能系统有限公司 | Flexible welding production line for all-aluminum vehicle body |
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| WO2019088600A1 (en) * | 2017-11-03 | 2019-05-09 | 에이엠테크놀로지 주식회사 | Polishing apparatus |
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| CN211332524U (en) * | 2019-12-23 | 2020-08-25 | 苏州利华科技股份有限公司 | Edge grinding device for flexible printed circuit board |
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| US10265825B2 (en) * | 2014-09-29 | 2019-04-23 | Mitsubishi Heavy Industries Engineering, Ltd. | Travel path grinding and travel path grinding method |
| KR20160099356A (en) * | 2015-02-12 | 2016-08-22 | 주식회사 씨케이엘 | Apparatus and method for grinding edge of substrate |
| WO2019088600A1 (en) * | 2017-11-03 | 2019-05-09 | 에이엠테크놀로지 주식회사 | Polishing apparatus |
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Denomination of invention: A production process of high density printed circuit board Effective date of registration: 20220712 Granted publication date: 20210903 Pledgee: Bank of Guangzhou Limited by Share Ltd. Jiangmen branch Pledgor: HESHAN RUNCHANG ELECTRONIC APPLIANCE Co.,Ltd. Registration number: Y2022980010315 |