CN111792436A

CN111792436A - ACF (active carbon fiber) pasting device of ACF pressing and pasting equipment of liquid crystal display screen and using method of ACF pasting device

Info

Publication number: CN111792436A
Application number: CN202010575381.1A
Authority: CN
Inventors: 曲容容; 侯亚呵; 李福娣; 李家英
Original assignee: Ningbo Yinzhou Teerfei Electronics Co ltd
Current assignee: Ningbo Yinzhou Teerfei Electronics Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-10-20

Abstract

The invention relates to the technical field of ACF pressing and pasting. An ACF pasting device of an ACF pressing and pasting device of a liquid crystal display screen comprises a base, a lower heating plate, a guide plate, a receiving guide wheel assembly, a broken material detection assembly, a pre-pressing assembly, a peeling assembly, a feeding guide wheel assembly and a vision camera; the guide plate is arranged on the base through an air cylinder, a groove is formed in the upper end of the guide plate, and the guide plate can be lifted through the air cylinder; the receiving guide wheel assembly is arranged on a side vertical plate of the base, the material breaking detection assembly is arranged on the side vertical plate of the base, the material belt of the ACF is downwards conveyed to the stripping assembly after passing through the material breaking detection assembly, and finally the material belt is wound on the feeding guide wheel assembly, and the fed ACF is wound on the feeding guide wheel assembly. The ACF adhesive tape has the advantages of no need of cutting the ACF, high adhering efficiency and accurate conveying.

Description

ACF (active carbon fiber) pasting device of ACF pressing and pasting equipment of liquid crystal display screen and using method of ACF pasting device

Technical Field

The invention relates to the technical field of ACF pressing and pasting, in particular to an ACF pasting device of liquid crystal display ACF pressing and pasting equipment.

Background

ACF, an anisotropic conductive film, is mainly composed of two parts, i.e. conductive particles and insulating release paper, and is mainly applied in the process of being unable to be soldered by high temperature lead-tin, such as the connection of FPC, PlasticCard, LCD, OLED, etc. When the ACF type touch screen is used, the release paper is firstly torn off, the ACF material is attached to electrodes of components such as a display screen, an upper object and a lower plate are pressed after accurate alignment, the insulating glue material is solidified after heating and pressurizing for a period of time, and finally a stable structure which is vertically conducted and transversely insulated is formed.

The traditional ACF pressing equipment is 207731042U as Chinese publication, and is named as an automatic positioning ACF attaching machine, and comprises a lower frame and a bottom plate fixed at the upper end of the lower frame, wherein an upper machine cover is fixedly arranged at the upper end of the bottom plate, a main frame plate is arranged at the front end of the upper machine cover, a feeding mechanism is arranged at the left side of the main frame plate, a hot-pressing device is arranged in the middle of the main frame plate, a material receiving mechanism and a recovery sleeve are arranged at the right side of the main frame plate, adjusting mechanisms are arranged at two sides of the hot-pressing device, a material pulling device is arranged at the rear side of the main frame plate, the feeding device is also arranged on the bottom plate, a speed regulator, a temperature controller and a ship-shaped switch; the utility model discloses a detection camera that can finely tune from top to bottom at main frame board, one side-mounting of hot press unit, the length of the attached flexible circuit board of detectable ACF material on the one hand effectively reduces the waste of ACF material, and on the other hand detects the relative position of ACF material for flexible circuit board, improves the attached precision of ACF material.

The ACF pressing paste of the existing liquid crystal display screen has the following defects: 1. ACF release paper needs to be cut and peeled off, and is difficult to paste; 2, the clamp force is difficult to control, the display screen is fragile, and the moving and transporting efficiency is low; 3. the automatic pressing efficiency between the flat cable and the display screen electrode is low, and the pressing quality is not high; 4. the flat cable and the display screen are bonded firmly, and the bonding precision is not high.

Disclosure of Invention

The invention aims to solve the problems that ACF release paper needs to be cut and peeled off and is difficult to paste in the prior art, and provides an ACF pasting device of an ACF pressing and pasting device of a liquid crystal display screen, which has the advantages of no need of cutting the ACF, high pasting efficiency and accurate conveying.

For the purpose of the invention, the following technical scheme is adopted: an ACF pasting device of an ACF pressing and pasting device of a liquid crystal display screen comprises a base, a lower heating plate, a guide plate, a receiving guide wheel assembly, a material breaking detection assembly, a pre-pressing assembly, a peeling assembly, a feeding guide wheel assembly and a visual camera; the base is fixed on the frame, the lower heating plate is arranged on the base, an electric heating wire is arranged in the lower heating plate for heating, and the lower heating plate is long-strip-shaped; the guide plate is arranged on the base through an air cylinder, a groove is formed in the upper end of the guide plate, the ACF is located in the groove, and the guide plate can be lifted through the air cylinder; the receiving guide wheel assembly is arranged on a side vertical plate of the base, a material belt of the recovered ACF is wound on the receiving guide wheel assembly, the material breaking detection assembly is arranged on the side vertical plate of the base, the material belt of the ACF is downwards conveyed to the peeling assembly after passing through the material breaking detection assembly, and is finally wound on the feeding guide wheel assembly, and the material belt of the sent ACF is wound on the feeding guide wheel assembly; the prepressing assembly and the stripping assembly are both arranged on the side of the base, the prepressing assembly is positioned above the stripping assembly, and the prepressing assembly is downwards fixed with the lower heating plate; the vision camera is mounted on the base in a suspending mode through the connecting plate, and the vision camera is arranged downwards.

Preferably, the material receiving guide wheel assembly comprises a driving motor and a driving roller arranged on a rotating shaft of the driving motor; the feeding guide wheel assembly comprises a driven roller, a pressing roller and a pressing cylinder which are hinged on the base; the pressing roller is arranged at the telescopic end of the pressing cylinder and leans against the side of the driven roller.

Preferably, the material breakage detection assembly comprises a material passing wheel, a fixed pulley, a heavy hammer and a pressure sensor; the feeding wheel is hinged on the sliding seat, the sliding seat is vertically movably connected on the base through the guide post, and the sliding seat can move up and down along the guide post; the fixed pulley is hinged to the upper end of the base, the heavy hammer is connected with the material passing wheel through a rope, and the rope is wound on the fixed pulley; the pressure sensor is arranged on the base and is positioned below the heavy hammer; the material strap of ACF twines on passing the material wheel, and the tension of the material strap of ACF is used in passing the material wheel, makes and passes material wheel and weight balanced mutually.

Preferably, the prepressing assembly comprises a base, a pasting cylinder, a cross adjusting seat, a lower pressing plate and a pressing rod; the base is fixed on the base, the pasting cylinder is installed on the base, the lower pressing plate is installed on the pasting cylinder through the cross-shaped adjusting seat, the heating wire is arranged in the lower pressing plate for heating, the pressing rods are installed on two sides of the cross-shaped adjusting seat and are in a right-angled folding shape, and the lowest horizontal part of each pressing rod is located below the lower pressing plate; the pressure bar is used for pressing the ACF material belt into a horizontal state and enabling the ACF material belt to leave the lower pressure plate when not subjected to external force.

Preferably, the stripping assembly comprises a back plate, a guide wheel, a suction plate, a stripping cylinder and a stripping column; the back plate is fixed on the base, the guide wheels are arranged at two ends of the back plate, the air suction plate is positioned between the two guide wheels, and the lower end of the air suction plate is provided with an air suction opening; the stripping cylinder is installed on the back face of the back plate, the stripping columns are connected to the moving end of the stripping cylinder, the two stripping columns are horizontally arranged, the two stripping columns are staggered in height, and the ACF material belt is located between the two stripping columns.

An ACF material roll is arranged on a feeding guide wheel component when the device works, an ACF material belt sequentially passes through a stripping component and a material breakage detection component and then is wound on a material receiving guide wheel component, and an active motor of the material receiving guide wheel component is used for drawing the ACF material belt to feed; the upper layer of the ACF material belt is release paper, and the lower layer is ACF material; ACF is when pasting, and the lower pressure bar that pastes the cylinder and drive the heating descends, and the lower pressure bar is close to the lower hot plate of heating, pastes ACF material hot melt on the electrode of display screen, then peels off the cylinder and drives and peel off the post round trip movement, rolls up the ACF material and leaves the electrode of display screen, makes the ACF material stay on the electrode of display screen, detects through the vision camera, and then the ACF material is rolled up and is continued to march.

A kind of liquid crystal display ACF presses and pastes the apparatus, it includes the stander and installs the display screen loading attachment, fixture device, moves the transport unit, ACF and pastes the device, winding displacement prepressing apparatus, winding displacement loading attachment, this pressure equipment and blanking unit on the stander; the jig device is provided with a plurality of groups side by side, and the jig device is correspondingly provided with an ACF prepressing station, a flat cable prepressing station 22, a first local pressing station and a second local pressing station; the moving device corresponds to the side of the moving device; the display screen feeding device, the ACF pasting device, the flat cable prepressing device and the local pressing device are sequentially connected along the processing direction, the ACF pasting device corresponds to an ACF prepressing station, the flat cable prepressing device corresponds to a flat cable prepressing station 22, the local pressing device is provided with two groups, the two groups of local pressing devices respectively correspond to a first local pressing station and a second local pressing station, and the flat cable feeding device is positioned on the side of the flat cable prepressing device; the ACF pasting device adopts the ACF pasting device of the ACF pressing and pasting equipment for the liquid crystal display screen.

Preferably, the display screen feeding device is used for conveying the display screen to the jig device, the moving device is used for conveying the display screen between stations, the ACF pasting device is used for pasting the ACF to the electrodes of the display screen, the flat cable feeding device is used for feeding flat cables, the flat cable prepressing device is used for prepressing the flat cables on the electrodes of the display screen, and the flat cable prepressing device is used for keeping a certain temperature and pressure to adhere the flat cables to the terminals of the display screen.

Adopt above-mentioned technical scheme's ACF to paste device is pasted to liquid crystal display ACF pressure equipment's advantage is: feeding by arranging an ACF material belt, and sticking an ACF material on an electrode of a display screen by heating and pressurizing a pre-pressing assembly, wherein the release paper is used as a carrier for conveying due to different melting points of the ACF and the release paper; the release paper is peeled by the peeling assembly, so that the ACF material is kept on the electrodes of the display screen, and stable and reliable ACF conveying is ensured; set up disconnected material detection subassembly and carry out ACF material area material loading state's detection, prevent that ACF from pasting the process mistake.

The display screen ACF pressing and pasting device adopting the technical scheme has the advantages that: the jig device fixes the planar display screen through the air suction plate, and the adsorption mode has better protection effect on the display screen and is not easy to break; the switching between the fixed state and the relaxed state is more efficient, the display screen can be conveniently sucked from the upper part, and the moving efficiency is improved; the pad seat is arranged to support the electrodes of the display screen, so that the accuracy of the electrodes is improved; the jig device is provided with two sets, can carry out the processing of two work pieces simultaneously, improves work efficiency. The ACF pasting device is used for loading materials in a mode of arranging an ACF material belt, pasting an ACF material on an electrode of a display screen in a heating and pressurizing mode of a pre-pressing assembly, and conveying the ACF material as a carrier due to different melting points of the ACF and release paper; the release paper is peeled by the peeling assembly, so that the ACF material is kept on the electrodes of the display screen, and stable and reliable ACF conveying is ensured; set up disconnected material detection subassembly and carry out ACF material area material loading state's detection, prevent that ACF from pasting the process mistake. The flat cable pre-pressing device is used for arranging a carrying disc provided with a plurality of flat cables by arranging the lateral conveying assembly, and the fixed position of flat cable feeding is adjusted each time by the second moving module and the third moving module, so that the carrying speed of the flat cables is improved; the flat cable is pressed by the pressing block, so that the flat cable is convenient to absorb by the sucking disc, and the bonding flatness between the flat cable and the display screen electrode is improved; set up pre-compaction camera and counterpoint, improve the qualification rate of finished product, reduce the defective percentage. The device carries out alignment through the visual alignment assembly, realizes accurate alignment and improves the accuracy of bonding; the jig assembly is arranged for local pressing, so that the positioning accuracy of the flat cable is ensured, the local pressing quality between the flat cable and the display screen electrode is improved, and meanwhile, the metal wiring terminal is heated and pressurized, so that the ACF can be prevented from overflowing; buffering through the tool enables the effort more even, improves the firmness of bonding.

Drawings

Fig. 1 is an exploded view of an ACF pressing device of a liquid crystal display panel according to an embodiment of the present invention.

Fig. 2 is an exploded view of the jig device.

Fig. 3 is an exploded view of the ACF applying device.

Fig. 4 is an exploded view of the flat cable prepressing device.

Fig. 5 is an exploded view of the pre-compression assembly.

Fig. 6 is an exploded view of the flat cable feeding device.

Fig. 7 is an exploded view of the present pressure device.

Fig. 8 is an exploded view of the jig assembly.

Detailed Description

As shown in fig. 1, an ACF pressing and pasting device for a liquid crystal display includes a frame 1, and a display screen feeding device, a jig device 2, a moving and transporting device 3, an ACF pasting device 4, a flat cable pre-pressing device 5, a flat cable feeding device 6, a local pressing device 7, and a blanking device mounted on the frame 1; the jig device 2 is provided with a plurality of groups side by side, and the jig device 2 is correspondingly provided with an ACF prepressing station 201, a flat cable prepressing station 202, a first local pressing station 203 and a second local pressing station 204; the moving device 3 corresponds to the side of the moving device 3; along the direction of processing, display screen loading attachment, ACF paste device 4, winding displacement pre-compaction device 5 and this pressure equipment device 7 link up the setting in proper order mutually, ACF paste device 4 correspond ACF pre-compaction station 201, winding displacement pre-compaction device 5 corresponds winding displacement pre-compaction station 202, this pressure equipment device 7 is provided with two sets ofly, two sets of this pressure equipment devices 7 correspond first this pressure station 203 and second this pressure station 204 respectively, winding displacement loading attachment 6 be located winding displacement pre-compaction device 5's side.

The display screen loading attachment be used for with the display screen transport to tool device 2, move the transport device 3 and be used for realizing the transport of display screen between the station, ACF pastes device 4 and is used for pasting ACF on the electrode of display screen, winding displacement loading attachment 6 be used for realizing the material loading of winding displacement, winding displacement pre-compaction device 5 be used for with the winding displacement pre-compaction on the electrode of display screen, winding displacement pre-compaction device 5 be used for keeping certain temperature and pressure with the winding displacement bonding on the terminal of display screen. The ACF attachment device 4 is an ACF attachment device of an ACF pressing device for a liquid crystal display panel.

Display screen loading attachment and unloader include conveyor belt and transport mechanism, the tool device 2 at transport mechanism correspondence both ends, transport mechanism go on unloading through absorbent mode.

As shown in fig. 2, the jig device 2 includes a fixing plate 21, a first screw assembly 22, and an adjustable jig mechanism 23; the adjustable jig mechanisms 23 are movably connected to the fixed plate 21 through slide rails, two groups of adjustable jig mechanisms 23 are arranged, two groups of first lead screw assemblies 22 are arranged, and the two groups of first lead screw assemblies 22 are oppositely arranged on the fixed plate 21; the adjustable jig mechanism 23 comprises a moving plate 231, a second lead screw assembly 232, a moving seat 233, a pad seat 234, a lifting assembly 235, a stepping motor 236, an air suction plate 237 and a lifting seat 238; the moving plate 231 is matched on the fixed plate 21, and the moving plate 231 is connected with the telescopic end of the first lead screw assembly 22; the second lead screw assembly 232 is mounted on the moving plate 231, the moving seat 233 is movably connected to the moving plate 231 through a slide rail, and the moving seat 233 is connected with the moving end of the second lead screw assembly 232; the cushion seat 234 is fixed on the movable seat 233, and the upper end of the cushion seat 234 is provided with a convex strip; a vertical plate 239 is further arranged on the side of the movable seat 233, a vertical slide rail is mounted on the vertical plate 239, and the lifting seat 238 is matched with the vertical plate 239 through the slide rail; the lifting assembly 235 is arranged on the vertical plate 239, and the lifting assembly 235 drives the lifting seat 238 to move up and down; the lifting assembly 235 comprises a motor, a lead screw and a lead screw sliding block, the lead screw sliding block is fixed with the lifting seat 238, the lead screw is in screw fit with the lead screw sliding block, and an output shaft of the motor is connected with the lead screw; the stepping motor 236 is arranged on the lifting seat 238, the air suction plate 237 is arranged at the rotating end of the stepping motor 236, a plurality of inwards-recessed rectangular grooves are formed in the upper end surface of the air suction plate 237, and the rectangular grooves are connected with the air suction valve; the lower end face of the air suction plate 237 is provided with an induction sheet, the lifting seat 238 is provided with an inductor 2381, and the induction sheet corresponds to the inductor 2381 and controls the rotation angle of the air suction plate 237. The first lead screw assembly 22 and the second lead screw assembly 232 are identical in structure and respectively comprise a driving motor, a lead screw shaft and a lead screw nut, the driving motor is a rotary power transmission end, and the lead screw nut is a translational power output end.

The jig device 2 is in operation, the display screen is placed on the air suction plate 237, the air suction plate 237 sucks the display screen, then two-degree-of-freedom movement in a horizontal plane is realized by the first lead screw assembly 22 and the second lead screw assembly 232, the lifting assembly 235 drives the display screen to descend, the electrode of the display screen is arranged on the cushion base 234, the electrode on one side of the display screen is processed, the air suction plate 237 ascends and rotates for half a circle after the processing is finished, and the same operation is carried out on the electrode on the other end.

The jig device 2 solves the problems that the display screen is fragile, the clamp force is difficult to control, and the moving efficiency is low, and the planar display screen is fixed through the air suction plate 237, so that the display screen is better protected by an adsorption mode and is not easy to break; the switching between the fixed state and the relaxed state is more efficient, the display screen can be conveniently sucked from the upper part, and the moving efficiency is improved; the pad seat 234 is arranged to support the electrodes of the display screen, so that the accuracy of the electrodes is improved; the jig device 2 is provided with two sets, and can process two workpieces simultaneously, thereby improving the working efficiency.

Move fortune device 3 including level and two vertical degrees of freedom that move, move the motion end of fortune device 3 and be the sucking disc subassembly, the sucking disc subassembly be provided with the multiunit, the display screen is inhaled from the top to the sucking disc subassembly, drives display screen synchronous motion.

As shown in fig. 3, the ACF applying apparatus includes a base 41, a lower heating plate 42, a guide plate 43, a receiving guide wheel assembly 44, a material breakage detection assembly 45, a pre-pressing assembly 46, a peeling assembly 47, a feeding guide wheel assembly 48, and a vision camera 49; the base 41 is fixed on the frame, the lower heating plate 42 is installed on the base 41, the heating wire is arranged in the lower heating plate 42 for heating, and the lower heating plate 42 is long-bar-shaped; the guide plate 43 is mounted on the base 41 through an air cylinder, a groove is formed in the upper end of the guide plate 43, the ACF is located in the groove, and the guide plate 43 can be lifted through the air cylinder; the receiving guide wheel assembly 44 is mounted on the side vertical plate of the base 41, the receiving guide wheel assembly 44 is wound with the material belt of the recovered ACF, the material breaking detection assembly 45 is mounted on the side vertical plate of the base 41, the material belt of the ACF passes through the material breaking detection assembly 45 and then is conveyed downwards to the peeling assembly 47, and finally is wound on the feeding guide wheel assembly 48, and the material belt of the sent ACF is wound on the feeding guide wheel assembly 48; the prepressing assembly 46 and the stripping assembly 47 are both arranged on the side of the base 41, the prepressing assembly 46 is positioned above the stripping assembly 47, and the prepressing assembly 46 is fixed with the lower heating plate 42 downwards; the vision camera 49 is mounted on the base 41 in a suspending manner through a connecting plate, and the vision camera 49 is arranged downwards.

The receiving guide wheel assembly 44 comprises a driving motor 441 and a driving roller 442 arranged on the rotating shaft of the driving motor 441; the feeding guide wheel assembly 48 comprises a driven roller 481, a pressing roller 482 and a pressing air cylinder 483 which are hinged on the base 41; the pinch roller 482 is mounted on the telescopic end of the pinch cylinder 483, with the pinch roller 482 resting on the side of the driven roller 481.

The material-breaking detection assembly 45 comprises a material passing wheel 451, a fixed pulley 452, a heavy hammer 453 and a pressure sensor; the material passing wheel 451 is hinged on a sliding seat, the sliding seat is vertically movably connected on the base 41 through a guide post, and the sliding seat can move up and down along the guide post; the fixed pulley 452 is hinged to the upper end of the base 41, the heavy hammer 453 is connected with the material passing wheel 451 through a rope, and the rope is wound on the fixed pulley 452; the pressure sensor is arranged on the base 41 and is positioned below the weight 453; the material belt of the ACF is wound on the material passing wheel 451, and the tension of the material belt of the ACF acts on the material passing wheel 451 to balance the material passing wheel 451 with the weight 453. When the material tape of the ACF is broken, the weight 453 is pressed down on the pressure sensor, and the broken condition is detected.

The pre-pressing assembly 46 comprises a base 461, a pasting cylinder 462, a cross adjusting seat 463, a lower pressing plate 464 and a pressing rod 465; the base 461 is fixed on the base 41, the pasting cylinder 462 is installed on the base 461, the lower press plate 464 is installed on the pasting cylinder 462 through the cross adjusting seat 463, the heating wire is arranged in the lower press plate 464 for heating, the press rod 465 is installed on two sides of the cross adjusting seat 463, the press rod 465 is in a right-angled folding shape, and the lowest horizontal part of the press rod 465 is positioned below the lower press plate 464; the pressing rod 465 is used for pressing the ACF material belt to be horizontal and enabling the ACF material belt to leave the lower pressing plate 464 when not subjected to external force, so that long-time heating is prevented.

The stripping assembly 47 comprises a back plate 471, a guide wheel 472, a suction plate 473, a stripping cylinder 474 and a stripping column 475; the back plate 471 is fixed on the base 41, the guide wheels 472 are installed at two ends of the back plate 471, the air suction plate 473 is located between the two guide wheels 472, and the lower end of the air suction plate 473 is provided with an air suction opening for sucking the release paper; the peeling cylinder 474 is installed on the back surface of the backboard 471, the peeling columns 475 are connected to the moving end of the peeling cylinder 474, the number of the peeling columns 475 is two, the two peeling columns 475 are staggered in height, and the ACF material belt is located between the two peeling columns 475.

When the ACF pasting device works, an ACF material roll is arranged on the feeding guide wheel assembly 48, an ACF material belt sequentially passes through the peeling assembly 47 and the material breaking detection assembly 45 and then is wound on the receiving guide wheel assembly 44, and the ACF material belt is pulled to be fed by the driving motor 441 of the receiving guide wheel assembly 44; the upper layer of the ACF material belt is release paper, and the lower layer is ACF material; when the ACF is pasted, the pasting cylinder 462 drives the lower pressing plate 464 which is heated to descend, the lower pressing plate 464 is close to the lower heating plate 42 which is heated, the ACF material is hot-melted and pasted on the electrode of the display screen, then the peeling cylinder 474 drives the peeling column 475 to move back and forth, the ACF material is rolled away from the electrode of the display screen, the ACF material is left on the electrode of the display screen and is detected through the vision camera 49, and then the ACF material roll continues to advance.

The ACF pasting device solves the problems that ACF release paper needs to be cut and peeled off and is difficult to paste, the ACF material belt is arranged for loading, the ACF material is pasted on the electrode of the display screen in a heating and pressurizing mode of the pre-pressing assembly 46, and the release paper is used as a carrier for conveying due to different melting points of the ACF and the release paper; the release paper is peeled by the peeling component 47, so that the ACF material is kept on the electrodes of the display screen, and stable and reliable ACF conveying is ensured; the material breakage detection component 45 is arranged to detect the feeding state of the ACF material belt, so that errors in the ACF pasting process are prevented.

As shown in fig. 4, the winding displacement pre-pressing device 5 includes an installation seat 51, a material receiving assembly 52, a lateral material conveying assembly 53, a lifting plate 54, a screw module 55 and a pre-pressing assembly 56; the mounting seat 51 is fixed on the rack, the material receiving assemblies 52 are arranged in the middle of the mounting seat 51, two groups of lateral material conveying assemblies 53 are arranged, and the two groups of lateral material conveying assemblies 53 are symmetrically arranged on two sides of the material receiving assemblies 52; the lifting plate 54 is movably connected to the mounting base 51 through a sliding rail, and the lead screw module 55 drives the lifting plate 54 to move on the mounting base 51; the lead screw module 55 comprises a motor, a lead screw shaft and a lead screw sliding block, the motor is fixed on the mounting base 51, the lead screw sliding block is spirally matched on the lead screw shaft, and the lead screw sliding block is fixed on the lifting plate 54; two groups of prepressing assemblies 56 are arranged, and the prepressing assemblies 56 are arranged on the lifting plate 54; the material receiving assembly 52 is used for collecting empty loading discs, the lateral material conveying assembly 53 is used for receiving the loading discs loaded with the flat cables and sequentially selecting the flat cables for prepressing, and the prepressing assembly 56 is used for conveying the flat cables and prepressing the flat cables on electrodes of the display screen.

As shown in fig. 5, the pre-pressing assembly 56 includes a side plate 561, a pre-pressing cylinder 562, a folded plate 563, a cross adjusting module 564, a heating block 565, a pre-pressing plate 566, a sheet metal connector 567, a suction cup 568 and a pressing block 569; the side plate 561 is fixedly arranged on the mounting seat 51, the pre-pressing cylinder 562 is arranged on the side plate 561, the folded plate 563 is connected with the telescopic end of the pre-pressing cylinder 562, and the folded plate 563 is movably connected to the side plate 561 through a sliding rail; the cross adjusting module 564 is installed at the lower end of the folded plate 563, the cross adjusting module 564 can adjust the distance between two vertical directions, the heating block 565 is installed below the cross adjusting module 564, a heat insulation pad is arranged between the heating block 565 and the cross adjusting module 564, the pressing block 569 is fixed on the heating block 565, the lower end of the pressing block 569 is provided with a convex edge, and the convex edge is used for pressing the flat cable on an electrode of the display screen; the sheet metal connecting piece 567 is arranged on the side of the heating block 565, and the sucking disc 568 and the pressing block 569 are both arranged on the sheet metal connecting piece 567.

The material receiving assembly 52 comprises a first movable module 521 and a material receiving plate 522, the material receiving plate 522 is installed at the telescopic end of the first movable module 521, and an empty carrying disc is placed at the upper end of the material receiving plate 522.

The lateral material conveying assembly 53 comprises a second moving module 531, a third moving module 532, a carrying disc 533 and a pre-pressing camera 534; the second moving module 531 and the third moving module 532 are vertically installed, the tray 533 is fixed to the moving end of the third moving module 532, the pre-pressing camera 534 is installed at the lower end of the tray 533, and the pre-pressing camera 534 is horizontally installed to perform alignment from the side.

When the flat cable prepressing device 5 works, the height of the prepressing component 56 is adjusted by the screw module 55, the carrying disc with the flat cables is received in the lateral conveying component 53, then the lateral conveying component 53 and the third moving module 532 act together through the second moving module 531 to convey the flat cables to a specified place, the flat cables are firstly pressed and leveled through the pressing block 569, then the flat cables are sucked through the sucking disc 568 and conveyed to the upper end of the display screen electrode, then the prepressing plate 566 descends after being heated to press the end of the flat cables, and the ACF is melted to connect the electrode of the display screen and the end of the flat cables.

The flat cable pre-pressing device 5 solves the problems of low automatic pressing efficiency and low pressing quality between the flat cables and the display screen electrodes, the side material conveying assembly 53 is arranged to arrange a carrying disc provided with a plurality of flat cables, and the fixed position of flat cable feeding is adjusted each time through the second moving module 531 and the third moving module 532, so that the carrying speed of the flat cables is improved; the flat cable is pressed by the pressing block 569, so that the flat cable is convenient to absorb by the sucking disc, and the bonding flatness between the flat cable and the display screen electrode is improved; and a pre-pressing camera 534 is arranged for alignment, so that the qualification rate of finished products is improved, and the defective rate is reduced.

As shown in fig. 6, the flat cable feeding device 6 comprises a frame 61, a feeding assembly 62, a traversing assembly 63, a longitudinally moving assembly 64, a carrying assembly 65 and a returning assembly 66; the feeding component 62 is positioned below the returning component 66, the transverse moving component 63 corresponds to the lateral side of the feeding component 62, the longitudinal moving component 64 is vertical to the transverse moving component 63, the carrying component 65 is arranged at the upper end of the longitudinal moving component 64, and the returning component 66 is positioned on the lateral side of the carrying component 65. The feeding assembly 62 is used for storing stacked flat cable carriers, flat cable carrying plates are prevented in the carriers, the transverse moving assembly 63 and the longitudinal moving assembly 64 are used for driving the carriers to move, the carrying assembly 65 is used for carrying the carrying plates to realize feeding, and the returning assembly 66 is used for recovering stacked empty carriers.

As shown in fig. 7, the pressing device 7 includes a support 71, a visual alignment assembly 72, a lifting adjustment assembly 73, a mounting plate 74, a jig assembly 75, and a pressing assembly 76; the support 71 is fixed on the frame, the visual alignment assembly 72 is arranged above the support 71, the mounting plate 74 is movably connected to the support 71 through a vertical sliding rail, the lifting adjusting assembly 73 is mounted on the support 71, and the moving end of the lifting adjusting assembly 73 is connected with the mounting plate 74; the lifting adjusting assembly 73 comprises a motor, a lead screw and a lead screw nut, the lead screw nut is spirally matched on the lead screw, the motor drives the lead screw to rotate, the lead screw drives the lead screw nut to move, and the lead screw nut is fixed with the mounting plate 74; the jig assembly 75 is installed on the support 71, the pressing assembly 76 is vertically arranged on the installation plate 74, the pressing assembly 76 is located right above the jig assembly 75, and the jig assembly 75 and the pressing assembly 76 are provided with two groups which are arranged side by side. The vision alignment assembly 72 comprises a movable sliding table 721, two folded plates 722 and two local pressing cameras 723, wherein the folded plates 722 are arranged on the movable part of the movable sliding table 721, the two local pressing cameras 723 are arranged on the folded plates 722, and the two local pressing cameras 723 are vertically arranged on the folded plates 722. The main pressing assembly 76 comprises a groove seat 761, a main pressing cylinder 762, an adjusting module 763 and a main pressing block 764; the groove seat 761 fix on the mounting panel 74, this air cylinder 762 vertically fix on the groove seat 761, this briquetting 764 through the adjustment module 763 install at this air cylinder 762's flexible end, the removal that two directions can be adjusted to the adjustment module 763, adjust the concrete position of this briquetting 764.

As shown in fig. 8, the jig assembly 75 includes a fixing bracket 751, a traverse frame 752, a jig carrier plate 753, a disc shaft 754, a driven gear 755, and a driving gear 756; the fixed bracket 751 is installed on the support 71, guide rails are arranged on two sides of the transverse moving frame 752, and the transverse moving frame 752 is movably connected to the fixed bracket 751 through the guide rails; the jig carrier plate 753 is placed on the transverse moving frame 752, the disc shaft 754 is arranged in the jig carrier plate 753, and the driven gear 755 is installed at the shaft end of one disc shaft 754; the driving gear 756 is installed at the side of the fixed bracket 751, the driving gear 756 corresponds to the driven gear 755, and the driving gear 756 is connected with a motor for driving; the side of the fixed bracket 751 is provided with a clamping piece which is pressed on a gear ring of the driven gear 755 through a spring, and the clamping piece enables the driven gear 755 to rotate only in one direction.

When the jig assembly 75 works, the transverse moving frame 752 is pulled open, the pressed jig is placed in the jig carrier plate 753, the transverse moving frame 752 is pushed in, the jig is in contact with a disc of the disc shaft 754, and the driving gear 756 is driven by the motor to rotate so as to drive the disc shaft 754 to rotate, so that the jig is moved and adjusted.

When the local pressing device 7 works, firstly, a jig for local pressing is placed in the jig component 75, and then the height of the local pressing component 76 is adjusted through the lifting adjusting component 73; this press camera 723 removes, to realizing the counterpoint of bonding position, then this air cylinder 762 drives this briquetting 764 and descends, and this briquetting 764 descends, presses on this pressure tool in tool subassembly 75, continues to descend, keeps a period of time under certain pressure and temperature, realizes this pressure.

The device 7 solves the problems of infirm bonding and low bonding precision between the flat cable and the display screen, and the alignment is carried out through the visual alignment assembly 72, so that accurate alignment is realized, and the bonding accuracy is improved; the jig component 75 is arranged for local pressing to ensure the positioning accuracy of the flat cable, so that the local pressing quality between the flat cable and the display screen electrode is improved, and meanwhile, the metal wiring terminal is heated and pressurized to prevent the ACF from overflowing; buffering through the tool enables the effort more even, improves the firmness of bonding.

When the liquid crystal display ACF pressing equipment works, the liquid crystal display ACF pressing equipment is processed through the following steps in sequence:

display screen feeding: the display screen feeding device sucks and carries the display screen to the jig device 2 to realize feeding;

(II) ACF pasting: the ACF material roll is arranged on the feeding guide wheel assembly 48, the ACF material belt sequentially passes through the stripping assembly 47 and the material breakage detection assembly 45 and then is wound on the material receiving guide wheel assembly 44, and the ACF material belt is pulled to be fed by the driving motor 441 of the material receiving guide wheel assembly 44; the upper layer of the ACF material belt is release paper, and the lower layer is ACF material; when the ACF is pasted, the pasting cylinder 462 drives the heated lower pressing plate 464 to descend, the lower pressing plate 464 is close to the heated lower heating plate 42, the ACF material is hot-melted and pasted on the electrode of the display screen, then the peeling cylinder 474 drives the peeling column 475 to move back and forth, the ACF material roll is separated from the electrode of the display screen, the ACF material is left on the electrode of the display screen and is detected by the vision camera 49, and then the ACF material roll continues to move;

(III) flat cable prepressing: the height of the pre-pressing component 56 is adjusted by the screw module 55, the carrying disc with the flat cable is received in the lateral conveying component 53, then the lateral conveying component 53 carries the flat cable to a specified place through the combined action of the second moving module 531 and the third moving module 532, the flat cable is firstly pressed and flattened through the pressing block 569, then the flat cable is sucked through the sucking disc 568 and carried to the upper end of the electrode of the display screen, then the pre-pressing plate 566 descends after being heated, the end part of the flat cable is pressed, and the electrode of the display screen and the end part of the flat cable are connected by melting the ACF;

(IV) flat cable basic pressing: firstly, a jig for home pressing is placed in the jig component 75, and then the height of the home pressing component 76 is adjusted through the lifting adjusting component 73; the pressing camera 723 moves to realize the alignment of the bonding part, then the pressing cylinder 762 drives the pressing block 764 to descend, the pressing block 764 descends to press on the pressing jig in the jig assembly 75, continues to descend, and is kept for a period of time under certain pressure and temperature to realize the pressing; sequentially carrying out primary pressing in two groups of primary pressing devices 7, wherein the temperature, the pressure and the time of the primary pressing are different;

(V) blanking of a display screen: the blanking device carries the display screen with the flat cables out of the jig device 2 to realize blanking.

Claims

1. An ACF pasting device of an ACF pressing and pasting device of a liquid crystal display screen is characterized by comprising a base (41), a lower heating plate (42), a guide plate (43), a receiving guide wheel assembly (44), a material breaking detection assembly (45), a pre-pressing assembly (46), a peeling assembly (47), a feeding guide wheel assembly (48) and a visual camera (49); the base (41) is fixed on the frame, the lower heating plate (42) is installed on the base (41), the lower heating plate (42) is internally provided with an electric heating wire for heating, and the lower heating plate (42) is in a long strip shape; the guide plate (43) is installed on the base (41) through an air cylinder, a groove is formed in the upper end of the guide plate (43), the ACF is located in the groove, and the guide plate (43) can be lifted through the air cylinder; the receiving guide wheel assembly (44) is arranged on a side vertical plate of the base (41), the receiving guide wheel assembly (44) is wound with a material belt of the recovered ACF, the material breaking detection assembly (45) is arranged on the side vertical plate of the base (41), the material belt of the ACF passes through the material breaking detection assembly (45) and then is sent to the peeling assembly (47) downwards, and finally is wound on the feeding guide wheel assembly (48), and the material belt of the sent ACF is wound on the feeding guide wheel assembly (48); the prepressing assembly (46) and the stripping assembly (47) are both arranged on the side of the base (41), the prepressing assembly (46) is positioned above the stripping assembly (47), and the prepressing assembly (46) is fixed with the lower heating plate (42) downwards; the vision camera (49) is mounted on the base (41) in a suspending mode through a connecting plate, and the vision camera (49) is arranged downwards.

2. The ACF bonding apparatus of the ACF pressing device for LCD screen of claim 1 wherein the receiving guide wheel assembly (44) comprises a driving motor (441) and a driving roller (442) mounted on the rotating shaft of the driving motor (441); the feeding guide wheel assembly (48) comprises a driven roller (481) hinged on the base (41), a pressing roller (482) and a pressing air cylinder (483); the pressing roller (482) is arranged at the telescopic end of the pressing cylinder (483), and the pressing roller (482) leans against the side of the driven roller (481).

3. The ACF pasting device of the liquid crystal display screen ACF pressing equipment as claimed in claim 1 or 2, wherein the material breaking detection component (45) comprises a material passing wheel (451), a fixed pulley (452), a heavy hammer (453) and a pressure sensor; the material passing wheel (451) is hinged on a sliding seat, the sliding seat is vertically movably connected on the base (41) through a guide post, and the sliding seat can move up and down along the guide post; the fixed pulley (452) is hinged to the upper end of the base (41), the heavy hammer (453) is connected with the material passing wheel (451) through a rope, and the rope is wound on the fixed pulley (452); the pressure sensor is arranged on the base (41) and is positioned below the heavy hammer (453); the material belt of the ACF is wound on the material passing wheel (451), and the tension of the material belt of the ACF acts on the material passing wheel (451) to balance the material passing wheel (451) and the heavy hammer (453).

4. The ACF pasting device of the liquid crystal display ACF pasting equipment of claim 1, 2 or 3, characterized in that the pre-pressing assembly (46) comprises a base (461), a pasting cylinder (462), a cross adjusting seat (463), a lower pressing plate (464) and a pressing rod (465); the base (461) is fixed on the base (41), the pasting cylinder (462) is installed on the base (461), the lower pressing plate (464) is installed on the pasting cylinder (462) through the cross adjusting seat (463), an electric heating wire is arranged in the lower pressing plate (464) for heating, the pressing rod (465) is installed on two sides of the cross adjusting seat (463), the pressing rod (465) is in a right-angled folding shape, and the lowest horizontal part of the pressing rod (465) is positioned below the lower pressing plate (464); the pressure lever (465) is used for pressing the ACF material belt to be horizontal and enabling the ACF material belt to leave the lower pressure plate (464) when not subjected to external force.

5. The ACF pasting device of the liquid crystal display ACF pressing equipment as claimed in claim 1, 2 or 3, wherein the peeling assembly (47) comprises a back plate (471), a guide wheel (472), an air suction plate (473), a peeling cylinder (474) and a peeling column (475); the back plate (471) is fixed on the base (41), the guide wheels (472) are installed at two ends of the back plate (471), the air suction plate (473) is positioned between the two guide wheels (472), and the lower end of the air suction plate (473) is provided with an air suction opening; the stripping air cylinder (474) is installed on the back face of the backboard (471), the stripping columns (475) are connected to the moving end of the stripping air cylinder (474), the two stripping columns (475) are horizontally arranged, the two stripping columns (475) are staggered in height, and the ACF material belt is located between the two stripping columns (475).

6. An application method of an ACF pasting device of an ACF pressing and pasting device of a liquid crystal display screen is characterized in that when the device works, an ACF material roll is arranged on a feeding guide wheel assembly (48), an ACF material belt sequentially passes through a stripping assembly (47) and a material breaking detection assembly (45) and then is wound on a receiving guide wheel assembly (44), and an active motor (441) of the receiving guide wheel assembly (44) is used for drawing the ACF material belt to be fed; the upper layer of the ACF material belt is release paper, and the lower layer is ACF material; ACF is when pasting, paste cylinder (462) and drive holding down plate (464) of heating and descend, holding down plate (464) are close to lower hot plate (42) of heating, with ACF material hot melt, paste on the electrode of display screen, then strip cylinder (474) and drive and peel off post (475) round trip movement, roll up the electrode that leaves the display screen with ACF material, make the ACF material stay on the electrode of display screen, detect through vision camera (49), then the ACF material book continues to advance.

7. The liquid crystal display ACF pressing and pasting equipment is characterized by comprising a rack (1), and a display screen feeding device, a jig device (2), a moving and conveying device (3), an ACF pasting device (4), a flat cable prepressing device (5), a flat cable feeding device (6), a local pressing device (7) and a discharging device which are arranged on the rack (1); the ACF application device (4) is set forth in claim 1.