Bonding method of double-sided bonding equipment

Abstract

The present invention relates to a laminating method for a two-sided laminating device, which strips the optical film in the optical film roll, laminates it with the first panel through alignment correction, tears off the release film on the optical film, turns it over and laminates it with the second panel in alignment, and then forms a finished product through pre-pressing, vacuum pressing and heating and pressing. By using the laminating method of the two-sided laminating device provided by the present invention, products that can accurately laminate both sides and have a firm lamination can be continuously produced on one device.

Description

Technical Field

[0001] The present invention relates to the field of production and processing equipment for film products, and particularly to a bonding method for a double-sided bonding device. Background Art

[0002] With the progress of society and the continuous high-speed development of technology, people's living standards and quality of life are constantly improving. People have higher and higher quality requirements for electronic products such as mobile phones, computers, and tablet computers, and the demand is increasing. Electronic products are increasingly becoming an important and essential role in people's daily lives.

[0003] The film pasting of parts is one of the essential steps in the production process of electronic products. The methods adopted in the market are manual film pasting or equipment film pasting. However, the existing equipment often focuses on the assembly of a single optical film and a single device, and it is necessary to separately process through multiple devices with different processes. The production continuity is poor, the efficiency is low, and it cannot meet the requirements of current automated production. In addition, because different devices are required for separate processing, it is easy to cause non-uniform production and affect product quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a double-sided bonding device that solves the problems of poor production continuity, low production efficiency, inaccurate and insecure film pasting of existing equipment.

[0005] The technical solution of the present invention is: a bonding method for a double-sided bonding device, which is characterized in that it includes the following steps:

[0006] Step 1, using the roll-to-roll die-cutting method to die-cut a hot melt adhesive film roll to form a plurality of optical film pieces formed on a protective film, and collecting the optical film pieces into an optical film roll at the receiving end of the die-cutting equipment;

[0007] Step 2, the optical film roll processed in Step 1 is sleeved on the unwinding mechanism of the stripping device. The optical film roll is released by the unwinding roller of the unwinding mechanism, passes through the front end of the stripping table and the rubber-coated roller mechanism in sequence, and is recovered by the winding roller of the winding mechanism. When the optical film roll passes through the front end of the stripping table, the optical film piece is peeled off from the protective film and falls onto the feeding platform;

[0008] Step 3, the worker places the first panel on the feeding platform of the first feeding mechanism, adjusts it to the set position through the limiting block, and the first panel moves to the film pasting station along with the feeding platform;

[0009] Step 4, the robotic arm mechanism transfers the optical film piece from the feeding platform to the film pasting station through the picking module, and after aligning and correcting the position of the optical film piece through the alignment and correction module, it is accurately attached to the top surface of the first panel;

[0010] Step 5, the first transfer mechanism transfers the first panel processed in the above step 4 on the feeding platform to the feeding station of the rotating platform of the rotating platform mechanism. After the rotating motor assembly controls the rotating platform to rotate 180° around the center, the first panel is transferred to the film tearing station of the rotating platform;

[0011] Step 6, the film tearing module displaces along the third bracket to above the film tearing station. After clamping the release film on the optical film, it moves along the third bracket to the side away from the film tearing station to tear the release film from the top surface of the optical film;

[0012] Step 7, the piston rod of the telescopic cylinder of the flipping mechanism extends to transfer the first panel processed in the above step 6 from the film tearing station of the rotating platform mechanism to the flipping plate, and then flips 180° and transfers it to the feeding platform of the feeding mechanism for position adjustment through a number of limit parts;

[0013] Step 8, the worker places the second panel on the third feeding platform and adjusts the position through a number of limit parts;

[0014] Step 9, the second feeding mechanism transfers the second panel after the position adjustment in the above step 8 from the third feeding platform to the pre-pressing platform, and the second transfer mechanism transfers the first panel after the position adjustment in the above step 7 above the pre-pressing platform and pre-presses and adheres it to the second panel;

[0015] Step 10, the third transfer mechanism transfers the product after the pre-pressing treatment in the above step 9 to the heating bottom plate of the lower cavity module of the heating and pressing mechanism. The lower cavity module moves along the guide rail provided on the bottom plate driven by the motor to the heating and pressing station;

[0016] Step 11, the lifting cylinder controls the upper cavity module to descend, and the bottom surface of the heating and pressing cavity is closely matched with the top surface of the lower cavity mechanism to form a sealed space, and the sealed space is subjected to vacuum pumping treatment;

[0017] Step 12, when the sealed space reaches the set vacuum degree and after the set time, the pressing component controls the heating plate to descend and fit with the top surface of the heating bottom plate to press the product;

[0018] Step 13, after the product pressing is completed, the upper cavity module and the lower cavity module are reset respectively. The third transfer mechanism transfers the product after the pressing in the above step 12 to the discharge conveyor belt assembly and then outputs it to the next process.

[0019] Preferably, the die-cutting method of the hot melt adhesive film roll in the above step 1 includes the following steps:

[0020] Step 1-1, put the hot melt adhesive film roll with the release film and the protective film adhered to both sides into the die-cutting equipment and feed it through the discharge end of the die-cutting equipment;

[0021] Step 1-2, perform roll-to-roll die cutting of a set size between the discharge end and the winding end of the die cutting device. During the die cutting process, the protective film is not penetrated, and a plurality of optical film pieces are formed and evenly arranged on the protective film. A release film is also adhered to the optical film pieces;

[0022] Step 1-3, using the protective film as the base tape, the winding end of the die cutting device winds the hot melt adhesive film into an optical film roll.

[0023] Preferably: The alignment and correction film pasting method in Step 4 includes the following steps:

[0024] Step 4-1, transfer the optical film piece above the loading platform through the material taking module. Adjust the output of the vacuum valve to control the upward suction generated by the material taking module to be weaker than the downward blowing generated by the loading platform, so that the optical film piece floats between the material taking module and the loading platform;

[0025] Step 4-2, the alignment and correction module adjusts the horizontal position and vertical position of the optical film piece respectively by controlling the telescoping of the first limit plate of the X-axis adjustment module and the telescoping of the second limit plate of the Y-axis adjustment module;

[0026] Step 4-3, after the adjusted optical film piece corresponds to the position of the first panel, control the front end of the material taking module to tilt downward, so that the optical film piece is attached to the top surface of the first panel from front to back in sequence;

[0027] Step 4-4, the roller module of the robotic arm mechanism descends under the action of the cylinder and contacts the top surface of the first panel. As the loading platform resets, the roller surface of the roller module rolls over the surface of the optical film piece from front to back in sequence to discharge the air between the optical film piece and the first panel, and stabilize the attachment between the optical film piece and the first panel.

[0028] Preferably: A film tearing detection and recycling method is also included between Step 6 and Step 7, including the following steps:

[0029] Step 6-1, the film tearing assembly moves above the recycling station, and the sensor of the recycling clamping mechanism checks whether it senses the release film. If not, jump to Step 6; if yes, proceed to the next step;

[0030] Step 6-2, the finger cylinder of the recycling clamping mechanism works, and the two clamping rods cooperate to clamp the release film on the film tearing assembly;

[0031] Step 6-3, after the rotating table rotates a set angle, the finger cylinder works, and the two clamping rods throw the release film into the recycling box.

[0032] Preferably: Step 9-1 is also included between Step 9 and Step 10. After the pre-pressing is completed, the observation mirror module moves to the pre-pressing platform under the drive of the motor, and the worker observes the product through the observation mirror module.

[0033] Preferably, between step 10 and step 11, there is also step 10-1. Before the lower cavity module moves to the heating and pressurizing station, the distance sensor detects the distance between the heating bottom plate, and the height adjustment component adjusts the initial height of the heating plate by detecting the distance and a preset value.

[0034] Preferably, the pressing method of the product in step 12 includes the following steps:

[0035] Step 12-1, after the set vacuum degree is reached in the closed cavity, the heating plate descends a first set distance under the drive of the pressurizing module for the first pressing.

[0036] Step 12-2, the lifting cylinder controls the upper cavity module to rise a second set distance, a gap is formed between the bottom surface of the heating and pressurizing cavity and the top surface of the lower cavity mechanism to form a non-closed cavity, and the heating plate descends a second set distance under the drive of the pressurizing module for the second pressing.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] For the laminating method of the double-sided laminating device provided by the present invention, the optical film roll is peeled off into optical film sheets through the stripping device, and then after being sequentially processed by the alignment and laminating device, the rotating film tearing device, the flipping feeding device, the pre-laminating pressing device and the heating and pressurizing device, a product that meets the double-sided lamination is produced, realizing the requirement of continuously producing laminated products using the optical film roll, and improving the production continuity and production efficiency;

[0039] Before the optical film sheet is laminated to the first panel, the present invention uses the alignment and laminating device to adjust the optical film sheet horizontally and vertically, so that it can be accurately aligned with the first panel and laminated from front to back in sequence. After the preliminary lamination, the roller module rolls from front to back to discharge the air between the optical film sheet and the first panel, further strengthening the lamination;

[0040] Before flipping, the present invention tears off the release film pasted on the surface of the optical film sheet through the rotating film tearing device, and is provided with a recovery detection mechanism, which uses the recovery detection mechanism to detect whether the release film is torn off, so as to avoid affecting the subsequent lamination of the optical film sheet to the second panel due to the presence of the release film and affecting the production efficiency;

[0041] The present invention is also provided with a pre-pressing observation mechanism. After the pre-pressing is completed, the staff observes and detects the product, and detects problems in time, improving the quality of the finished product;

[0042] Before the heating and pressing mechanism adopted by the present invention cooperates the upper cavity module and the lower cavity module, a distance sensor is used to measure the height, the height of the heating plate is adjusted by the height adjustment module, and the pressing module applies pressure to the back surface of the pressing plate. Through the cooperation of the above mechanisms, precise height control and pressing are achieved, avoiding problems such as uneven stress on the product to be processed or excessive pressure overshoot, which may cause damage to the product or affect the product quality. Brief Description of the Drawings

[0043] Figure 1 is a schematic structural diagram of a double-sided laminating device;

[0044] Figure 2 is a schematic structural diagram of the double-sided laminating device in another direction;

[0045] Figure 3 is a schematic structural diagram of a stripping device;

[0046] Figure 4 is a schematic structural diagram of a first feeding mechanism;

[0047] Figure 5 is an exploded schematic structural diagram of a robotic arm mechanism;

[0048] Figure 6 is a schematic structural diagram of a rotating film tearing device and a flipping feeding device;

[0049] Figure 7 is an exploded schematic structural diagram of a rotating platform mechanism;

[0050] Figure 8 is a schematic structural diagram of a film tearing assembly;

[0051] Figure 9 is a schematic structural diagram of a flipping mechanism;

[0052] Figure 10 is a schematic structural diagram of a film laminating pre-pressing mechanism;

[0053] Figure 11 is a schematic structural diagram of a heating and pressing device;

[0054] Figure 12 is a schematic cross-sectional structural diagram of an upper cavity mechanism. Detailed Embodiments

[0055] The present invention will be further described in detail below with reference to the drawings:

[0056] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention.

[0057] Please refer to Figure 1 , Figure 2 As shown, the present invention provides a two-sided laminating device, which includes a frame 1, a stripping device 3 fixed at the feeding end of the frame 1, a discharging conveyor belt device 9 fixed at the discharging end of the frame 1, and a bottom plate 2 fixed on the frame 1 and located between the stripping device 3 and the discharging conveyor belt device 9. A registration correction film laminating device 4, a rotary film tearing device 5, a flipping feeding device 6, a film pre-pressing device 7, and a heating and pressing device 8 are sequentially installed on the bottom plate 2 along the processing sequence;

[0058] Please refer to Figures 1 to 3 As shown, the stripping device 3 includes a first vertical plate 31 fixed on the frame 1, a material feeding mechanism installed on the rear side of the first vertical plate 31 through a second vertical plate 32, a stripping table 34 fixed on the inner side of the first vertical plate 31, a rubber-coated roller mechanism, a winding mechanism, and several guide rollers 37. It also includes a material receiving platform 38 fixed on the bottom plate 2, and the front end of the stripping table 34 is located above the material receiving platform 38;

[0059] The unwinding mechanism includes a brake installed on the outer side of the second vertical plate 31 through a fixing bolt, and an unwinding roller 331 sleeved on the output shaft of the brake;

[0060] The front end of the stripping table 34 is designed to be acute-angled to facilitate better peeling of the optical film from the protective film;

[0061] The rubber-coated roller mechanism includes a first driving motor assembly installed on the outer side of the first vertical plate 31 through a fixing bolt, a rubber-coated roller 351 sleeved on the output shaft of the first driving motor assembly and located on the inner side of the first vertical plate 31, and a pressing roller 352 arranged in parallel with the rubber-coated roller 351. One end of the pressing roller 352 is slidably installed on the inner side of the first vertical plate 31 through a bearing seat, and the other end is connected to the end of the rubber-coated roller 351 through a connecting member. The roller surface of the pressing roller 352 is in close fit with the roller surface of the rubber-coated roller 351;

[0062] The winding mechanism includes a second driving motor assembly installed on the outer side of the first vertical plate 31 through a fixing bolt, and a winding roller 361 sleeved on the output shaft of the second driving motor assembly and located on the inner side of the first vertical plate 31;

[0063] The optical film roll is output from the unwind roller 331 of the unwind mechanism, and successively passes under the first idler roller 37, the front end of the stripping roller 34, above the second idler roller 37, and through the gap between the rubber-coated roller 351 and the pressing roller 352, and then is recycled by the winding roller 361 of the winding mechanism. The optical film on the optical film roll is separated from the surface of the optical film roll at the front end of the stripping table and transferred to the surface of the winding platform 38;

[0064] The surface of the winding platform 38 is provided with a number of adsorption holes communicated with the vacuum valve for adsorbing the optical film.

[0065] The unwind roller of the stripping device is connected to the brake, which can ensure that the optical film roll will not be output without external force pulling, and can improve the discharging accuracy of the optical film. The stripping device drives the winding roller to wind through the second drive motor assembly and drives the rubber-coated roller to rotate through the first drive motor, which can ensure that the optical film roll can maintain an appropriate tension during the unwinding and winding process, is beneficial to improving the discharging accuracy, reducing the time of manual adjustment, and improving the discharging efficiency.

[0066] Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 As shown in, the alignment and correction film pasting device includes a first bracket 41 fixed on the base plate 2, a first feeding mechanism fixed on the base plate 2, a first transverse linear module 43 arranged on the first bracket 41, and a robotic arm mechanism movably installed on the first transverse linear module 43. A first ion blower 411 is further provided below the first bracket 41 and below the first transverse linear module 43. When the robotic arm mechanism slides to the left limit point of the first transverse linear module 43, the robotic arm mechanism is located above the winding platform; when the robotic arm mechanism slides to the right limit point of the first transverse linear module 43, the robotic arm mechanism is located above the first feeding mechanism;

[0067] The first winding mechanism includes a first longitudinal linear module 421 installed on the base plate 2, two longitudinal guide rails 422 installed on the base plate 2 and symmetrically arranged on both sides of the first longitudinal linear module 421, a first feeding platform 423 slidably installed on the two longitudinal guide rails 422, a third drive motor assembly 425 fixed on the base plate 2 and used to drive the first feeding platform 423 to slide along the longitudinal guide rails 422, and a second feeding platform 424 slidably installed on the first longitudinal linear module 421;

[0068] The robotic arm mechanism includes a first lifting linear module 451 slidably mounted on the first cross - translation linear module 43, a first support base 452 movably mounted on the first lifting linear module 451, a picking module movably mounted on the bottom surface of the first support base 452 for adsorbing the optical film, an alignment and correction module movably mounted on the side wall of the first support base 452 for correcting the optical film on the picking module, and a rolling module 455 mounted on the front side wall of the first support base 452;

[0069] The picking module includes a third vertical plate 4531 fixed to the top surface of the first support base 452, a hinge seat 4532 fixed to the side wall of the third vertical plate 4531, an adjusting cylinder 4533 hinged to the hinge seat 4532, a connecting member 4534 fixed to the end of the piston rod of the adjusting cylinder, and an adsorption platform assembly 4535 whose top surface is connected to the bottom surface of the connecting member 4534. The picking module further includes first connecting seats 4536 mounted on both sides of the first support base 452 through a coupling shaft. The bottom surface of the first connecting seat 4536 is connected to the rear end of the top surface of the adsorption platform assembly 4535. The adsorption platform assembly 4535 rotates around the coupling shaft under the action of the adjusting cylinder 4533;

[0070] Limit rods 4521 are further provided at the front ends of both side walls of the first support base 452 for restricting the maximum rotation height of the front end of the adsorption platform assembly;

[0071] The adsorption platform assembly 4535 includes a first connecting plate 45351, a sealing plate 45352, and an adsorption plate 45353 connected in sequence.

[0072] The alignment and correction module includes a horizontal adjustment module and a vertical adjustment module;

[0073] The horizontal adjustment module includes a horizontal adjustment cylinder 45411 horizontally mounted on the left side wall of the first support base through a fixing bolt, a second connecting plate 45412 sleeved on the cylinder body of the horizontal adjustment cylinder 45411, two horizontal guide rods 45413 opposed to both sides of the second connecting plate 45412 and extending through the first support base 452 to the right side wall of the first support base 452, a second connecting seat 45414 connecting the other ends of the two horizontal guide rods 45413, a first lifting cylinder 45415 whose piston rod end is mounted on the top surface of the second connecting seat 45414 through a fixing bolt, a third connecting plate 45416 sleeved on the cylinder body of the first lifting cylinder 45415, and a first limiting plate 45418 connected to both sides of the third connecting plate 45416 through two first lifting guide rods 45417;

[0074] The longitudinal adjustment module includes a longitudinal adjustment cylinder 45421 horizontally installed on the rear side wall of the first support base 452 through fixing bolts, a fourth connecting plate 45422 sleeved on the cylinder body of the longitudinal adjustment cylinder 45421, two longitudinal guide rods 45423 opposed to both sides of the fourth connecting plate 45422 and sequentially extending forward through the first support base 452, a third connecting seat 45424 connecting the other ends of the two longitudinal guide rods 45423, a second lifting cylinder 45425 with the end of the piston rod installed on the top surface of the third connecting seat 45424 through fixing bolts, a fifth connecting plate 45426 sleeved on the cylinder body of the second lifting cylinder 45425, and a second limiting plate 45428 connected to both sides of the fifth connecting plate 45426 through two second lifting guide rods 45427.

[0075] The rolling module includes a sixth connecting plate 4551 fixed to the front end of the first support base 452, a third lifting cylinder 4552 installed on the top surface of the sixth connecting plate 4551, lifting guide rails 4443 opposed to the outer side walls of the sixth connecting plate 4551, a first lifting plate 4554 movably installed on the lifting guide rails 4553 through sliders and with the top surface connected to the end of the piston rod of the third lifting cylinder 4552, a fourth connecting seat 4555 fixed to the outer side wall of the first lifting plate 4554, a number of pneumatic valves 4556 equidistantly arranged on the top surface of the fourth connecting seat 4555, a second lifting plate 4557 arranged below the fourth connecting seat 4555 and lifted and lowered jointly controlled by the number of pneumatic valves 4556, and rollers 4559 installed below the second lifting plate 4557 through first connecting rods 4558 on both sides;

[0076] A slot through which the longitudinal guide rod 45423 of the Y-axis adjustment module passes is also provided on the second lifting plate 4557.

[0077] Please refer to Figure 1 、 Figure 2 、 Figure 6 As shown, the rotary film tearing device 5 includes a first transfer mechanism 51, a rotary platform mechanism 52 and a film tearing mechanism fixedly arranged on the bottom plate 2;

[0078] Please refer to Figure 7 As shown, the rotary platform mechanism 52 includes a second bracket 521 fixedly arranged on the bottom plate 2, a rotary motor assembly 522 fixed to the bottom of the second bracket 521, and a rotary platform 523 with the center of the bottom surface connected to the output end of the rotary motor assembly 522;

[0079] The rotating platform 523 is an integrally formed plate body that is symmetric about the central line structure. Adsorption platforms 54 are respectively installed on the left and right sides of the rotating platform 523 through fixing members. Flipping holes 5231 are symmetrically formed through both sides of the rotating platform 523. The adsorption platform 54 includes a sealing plate 541 and an adsorption plate 542. A plurality of adsorption holes are evenly formed through the adsorption plate 542. A closed space is formed between the sealing plate 541 and the adsorption plate 542, and the closed space is communicated with a vacuum valve through a trachea;

[0080] Please refer to Figure 1 、 Figure 2 、 Figure 6 、 Figure 8 As shown in the figures, the film tearing mechanism includes a rotating table (not shown) fixed on the bottom plate 2, a third support 531 fixed on the rotating table, a second transverse translation linear module 532 installed on the third support 531, a film tearing module 533 movably installed on the second transverse translation linear module 532. It further includes a recycling box 534 fixed on the frame 1. A recycling clamping mechanism is further fixed on the third support 531 above the recycling box 534;

[0081] A second ion blower 5311 is further provided on the third support 531 below the second transverse translation linear module 532;

[0082] The film tearing module includes a second lifting linear module 5331 movably installed on the second transverse translation linear module 532, and a second support seat 5332 movably installed on the second lifting linear module 5331. The lower end of the second support seat 5332 is connected with a bearing platform, and a film tearing assembly is arranged on the side surface of the bearing platform;

[0083] The film tearing assembly 533 includes a film tearing cylinder 5333 fixed on the top surface of the load platform, a clamping plate 5334 fixed at the end of the piston rod of the film tearing cylinder 5333, a fifth connecting seat 5335 fixed on the bottom surface of the load platform, and rollers 5337 installed under the fifth connecting seat 5335 through second connecting rods 5336 on both sides. A groove conforming to the shape of the roller 5337 is recessed at the bottom end of the clamping plate 5334, and the surface of the groove is in close fit with the surface of the roller 4337;

[0084] The recycling clamping module includes a finger cylinder 5351 fixed on the lower part of the third support 531, and a clamping rod 5352 fixed on the gripper of the finger cylinder 5351. An inductor 5353 is further arranged on the clamping rod 5352, and the inductor 5353 is used to detect the release film clamped after the film tearing assembly tears the film.

[0085] Please refer to Figure 1 、 Figure 2 、 Figure 6As shown, the flipping and feeding device 6 includes a flipping mechanism 61 disposed on the bottom plate 2 and at the discharging end of the rotary film tearing device 5, and a feeding mechanism 62 located between the flipping mechanism 61 and the film pasting and pre-pressing device 7;

[0086] Please refer to Figure 9 As shown, the flipping mechanism 61 includes a carrier plate 611 fixed below the bottom plate 2 through a column, two side plates 612 opposed on the carrier plate 611, two telescopic cylinders 613 symmetrically disposed outside the two side plates 612, a bearing seat 614 fixed at the end of the piston rod of the telescopic cylinder 613, a coupling shaft 615 connecting the two bearing seats 614, a flipping plate 616 installed on the coupling shaft 615 through a fixing member and rotating synchronously with the coupling shaft 615, and a flipping motor 617 fixed outside one of the side plates 612 and with an output shaft connected to the coupling shaft 615. The shape of the flipping plate 616 fits the shape of the flipping hole 5231 provided in the rotary platform 523;

[0087] A plurality of vacuum suction cups 618 for adsorbing optical film sheets are uniformly distributed on the flipping plate 616.

[0088] Please refer to Figure 6 As shown, the discharging mechanism includes a discharging crosswise linear module 621 and a discharging guide rail 622 fixed on the bottom plate 2, and a discharging platform 623 movably installed on the discharging crosswise linear module and the discharging guide rail. A plurality of mutually perpendicular chutes are provided in the discharging platform 623, and a plurality of limiting members 624 movably installed on the chutes are provided on the discharging platform 623.

[0089] Please refer to Figure 1 、 Figure 2 、 Figure 10 As shown, the film pasting and pre-pressing mechanism 7 includes a second transfer mechanism 71 fixed on the bottom plate 2, a third loading platform 72, a pre-pressing platform 73, a second loading mechanism, and a pre-pressing observation mechanism. The second transfer mechanism 71 is located between the flipping and feeding device 6 and the pre-pressing platform 73. The second loading mechanism is arranged side by side on the sides of the third loading platform 72 and the pre-pressing platform 73. The pre-pressing observation mechanism is arranged on the side of the pre-pressing platform 73;

[0090] Shaped-fitting material taking holes 721 and material placing holes 731 are respectively provided in the third loading platform 72 and the pre-pressing platform 73. A plurality of members 76 are slidably installed on the third loading platform 72;

[0091] The second feeding mechanism includes a second longitudinal linear module 741 movably installed on the bottom plate 2, and a feeding module movably installed on the second longitudinal linear module 741. The feeding module includes a feeding cylinder 742 and a material taking plate 743 fixed to the end of the piston rod of the feeding cylinder 742. The shape of the material taking plate 743 corresponds to the shapes of the material taking hole 721 and the material discharging hole 731.

[0092] The pre-pressing observation mechanism includes a third longitudinal linear module 751 movably installed on the bottom plate 2, and an observation mirror module 752 movably installed on the third longitudinal linear module 751.

[0093] Please refer to Figure 1 、 Figure 2 、 Figure 11 As shown in, the heating and pressing device 8 includes a third transfer mechanism 81 arranged on the bottom plate 2, and at least one set of heating and pressing mechanisms 82 arranged on the bottom plate and arranged in parallel with the third transfer mechanism 81;

[0094] The heating and pressing mechanism 82 includes a feeding driving module fixed to the bottom plate 2, two lifting driving modules opposed to each other on the bottom plate, a lower cavity module movably installed on the bottom plate 2 through the feeding driving module, and an upper cavity module lifted and lowered relative to the bottom plate through the two lifting driving modules;

[0095] The feeding driving module includes feeding guide rails 8211 opposed to each other on the bottom plate 2, and a feeding motor assembly fixed to the bottom plate 2 and located between the two feeding guide rails 8211. The feeding motor assembly includes a feeding motor 8212, a first lead screw 8213 connected to the output shaft of the feeding motor 8212 and installed on the bottom plate 2 through two side bearing seats, and a first lead screw nut seat 8214 sleeved on the first lead screw 8213 and fixed to the bottom surface of the lower cavity mechanism.

[0096] The lower cavity module 31 includes a lower cavity body 8231. The top surface of the lower cavity body 8231 is concave to form a cavity. The bottom surface of the lower cavity body 8231 is connected to the first lead screw nut seat 8214, and a heating bottom plate 8232 is fixed in the cavity.

[0097] The lifting driving module includes two lifting cylinders 8221 opposed to each other on the bottom plate 2, and two first guide rods 8222 arranged on the bottom plate 2 and distributed on both sides of the lifting cylinders 8221;

[0098] The upper cavity module includes a substrate 8241 fixed to the end portions of the piston rods of the two lifting cylinders 8221 and sleeved on the first guide rod 8222 through linear bearings, a heating and pressurizing cavity 8242 formed by a plurality of side walls fixedly arranged on the bottom surface of the substrate 8241 and closely fitting with each other, a height adjusting component fixedly arranged on the top surface of the substrate 8241, and a pressurizing component driven by the height adjusting component to lift relative to the substrate 8241. A heating plate 8245 is further fixedly arranged at the bottom of the pressurizing component, and the heating plate 8245 is located inside the heating and pressurizing cavity 8242. A distance sensor 8246 is also fixedly arranged on the outer side wall of the feeding end of the heating and pressurizing cavity 8242;

[0099] The height adjusting component includes a fourth bracket 82431 fixedly arranged on the substrate 8241, a lifting motor 82432 installed on the fourth bracket 82431 and having an output shaft extending downward, and a second lead screw 82433 connected to the output shaft of the lifting motor 82432;

[0100] The pressurizing module includes a fifth bracket 82441 sleeved on the second lead screw 82433 through a lead screw nut, two pressurizing cylinders 82442 disposed opposite to each other on both sides of the fifth bracket 82441, a second connecting plate 82443 connecting the end portions of the piston rods of the two pressurizing cylinders 82442 and sleeved outside the fourth bracket 82431, and a heating plate 8245 connected to the bottom surface of the second connecting plate 82443 through a second guide rod 82444. The heating plate 8245 is located inside the heating and pressurizing cavity 8242;

[0101] The substrate 8241 is sleeved on the second guide rod 82444 through a linear bearing, and in addition to guiding, it can also be used to seal the upper part of the heating and pressurizing cavity.

[0102] The first transfer mechanism 51, the second transfer mechanism 71, and the third transfer mechanism 81 have the same structure, including a transfer bracket, a transfer linear module installed on the transfer bracket, and a transfer module movably installed on the transfer linear module. An unloading module is also movably installed on the third transfer mechanism 81 for transferring the completed product to the unloading conveyor belt mechanism 9.

[0103] The product film pasting method of the double-sided laminating device provided by the present invention specifically includes the following steps:

[0104] Step 1, using a roll-to-roll die-cutting method to die-cut a hot melt adhesive film roll to form a plurality of optical film pieces formed on a protective film, and collecting them into an optical film roll at the receiving end of the die-cutting device:

[0105] Step 2: The optical film roll set processed in Step 1 is sleeved on the unwinding mechanism of the stripping device. The optical film roll is unwound by the unwinding roller of the unwinding mechanism, and successively passes through the front end of the stripping table and the rubber coating roller mechanism, and then is recovered by the winding roller of the winding mechanism. When the optical film roll passes through the front end of the stripping table, the optical film is peeled off from the protective film and falls onto the feeding platform;

[0106] Step 3: The worker places the first panel on the feeding platform of the first feeding mechanism and adjusts it to the set position through the limit block. The first panel moves to the film sticking station along with the feeding platform;

[0107] Step 4: The robotic arm mechanism transfers the optical film from the feeding platform to the film sticking station through the material taking module. After the position of the optical film is aligned and corrected by the alignment and correction module, it is accurately attached to the top surface of the first panel;

[0108] Step 5: The first transfer mechanism transfers the first panel processed in Step 4 on the feeding platform to the feeding station of the rotating platform of the rotating platform mechanism. After the rotating motor assembly controls the rotating platform to rotate 180° around the center, the first panel is transferred to the film tearing station of the rotating platform;

[0109] Step 6: The film tearing module moves along the third support to the upper part of the film tearing station. After clamping the release film on the optical film, it moves along the third support to the side away from the film tearing station, and tears the release film from the top surface of the optical film;

[0110] Step 7: The piston rod of the telescopic cylinder of the flipping mechanism extends, transfers the first panel processed in Step 6 from the film tearing station of the rotating platform mechanism to the flipping plate, and then flips 180° and transfers it to the feeding platform of the feeding mechanism, and the position is adjusted through several limit parts;

[0111] Step 8: The worker places the second panel on the third feeding platform and adjusts the position through several limit parts;

[0112] Step 9: The second feeding mechanism transfers the second panel whose position is adjusted in Step 8 from the third feeding platform to the pre-pressing platform. The second transfer mechanism transfers the first panel whose position is adjusted in Step 7 above the pre-pressing platform and pre-presses and attaches it to the second panel;

[0113] Step 10: The third transfer mechanism transfers the product processed in Step 9 to the heating bottom plate of the lower cavity module of the heating and pressing mechanism. The lower cavity module moves along the guide rail set on the bottom plate driven by the motor to the heating and pressing station;

[0114] Step 11: The lifting cylinder controls the upper cavity module to descend. The bottom surface of the heating and pressing cavity is closely matched with the top surface of the lower cavity mechanism to form a sealed space, and the sealed space is evacuated;

[0115] Step 12: When the enclosed space reaches the set vacuum level and after the set time, the pressurizing assembly controls the heating plate to descend and fit against the top surface of the heating bottom plate to press the product.

[0116] Step 13: After the product pressing is completed, the upper cavity module and the lower cavity module are reset respectively. The third transfer mechanism transfers the product after pressing in Step 12 to the discharge conveyor belt assembly and then outputs it to the next process.

[0117] The die-cutting method of the hot melt adhesive film roll in Step 1 includes the following steps:

[0118] Step 1-1: Place the hot melt adhesive film roll with release film and protective film attached to both sides into the die-cutting equipment and feed it through the discharge end of the die-cutting equipment.

[0119] Step 1-2: Perform roll-to-roll die-cutting of the set size between the discharge end and the rewinding end of the die-cutting equipment. During the die-cutting process, the protective film is not penetrated, and several optical film pieces are formed and evenly arranged on the protective film. The release film is also attached to the optical film pieces.

[0120] Step 1-3: Using the protective film as the base band, the rewinding end of the die-cutting equipment rewinds the hot melt adhesive film roll into an optical film roll.

[0121] The alignment correction and film pasting method in Step 4 includes the following steps:

[0122] Step 4-1: The optical film piece is transferred above the loading platform through the picking module. Adjust the output of the vacuum valve to control the upward suction generated by the picking module to be weaker than the downward blowing generated by the loading platform, so that the optical film piece floats between the picking module and the loading platform.

[0123] Step 4-2: The alignment correction module adjusts the horizontal position and vertical position of the optical film piece respectively by controlling the expansion and contraction of the first limit plate of the X-axis adjustment module and the expansion and contraction of the second limit plate of the Y-axis adjustment module.

[0124] Step 4-3: After the adjusted optical film piece corresponds to the position of the first panel, control the front end of the picking module to tilt downward so that the optical film piece is attached to the top surface of the first panel from front to back in sequence.

[0125] Step 4-4: The roller module of the robotic arm mechanism descends under the action of the cylinder and contacts the top surface of the first panel. As the loading platform resets, the roller surface of the roller module rolls over the surface of the optical film piece from front to back in sequence to discharge the air between the optical film piece and the first panel and stabilize the attachment between the optical film piece and the first panel.

[0126] Between Step 6 and Step 7, there is also a film tearing detection and recovery method, including the following steps:

[0127] Step 6-1: The film tearing assembly moves above the recycling station. Check if the sensor of the recycling clamping mechanism senses the release film. If not, jump to Step 6; if yes, proceed to the next step.

[0128] Step 6-2: The finger cylinder of the recycling clamping mechanism operates, and the two clamping rods cooperate to clamp the release film on the film tearing assembly.

[0129] Step 6-3: After the rotating table rotates by a set angle, the finger cylinder operates, and the two clamping rods drop the release film into the recycling box.

[0130] Between Step 9 and Step 10, there is also Step 9-1. After pre-pressing is completed, the observation mirror module moves to the pre-pressing platform under the drive of the motor, and the worker observes the product through the observation mirror module during pre-pressing.

[0131] Between Step 10 and Step 11, there is also Step 10-1. Before the lower cavity module moves to the heating and pressing station, the distance sensor detects the distance from the heating bottom plate, and the height adjustment component adjusts the initial height of the heating plate based on the detected distance and the preset value.

[0132] The pressing method of the product in Step 12 includes the following steps:

[0133] Step 12-1: After the set vacuum degree is reached in the sealed cavity, the heating plate descends a first set distance under the drive of the pressing module for the first pressing.

[0134] Step 12-2: The lifting cylinder controls the upper cavity module to rise a second set distance, creating a gap between the bottom surface of the heating and pressing cavity and the top surface of the lower cavity mechanism to form a non-sealed cavity. Then the heating plate descends a second set distance under the drive of the pressing module for the second pressing.

[0135] The above are only the preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A bonding method for a two-sided bonding device, comprising: Step 1: Use the roll-to-roll die-cutting method to die-cut the hot melt adhesive film roll to form several optical film pieces formed on the protective film, and collect them into an optical film roll at the receiving end of the die-cutting equipment. It is characterized in that the following steps are further included: Step 2: The optical film roll processed in Step 1 is sleeved on the unwinding mechanism of the stripping device. The optical film roll is unwound by the unwinding roller of the unwinding mechanism, passes through the front end of the stripping table and the rubber-coated roller mechanism in sequence, and is recovered by the receiving roller of the receiving mechanism. When the optical film roll passes through the front end of the stripping table, the optical film piece is peeled off from the protective film and falls onto the feeding platform. Step 3: The worker places the first panel on the feeding platform of the first feeding mechanism, adjusts it to the set position through the limit block, and the first panel moves to the film pasting station along with the feeding platform. Step 4: The robotic arm mechanism transfers the optical film piece from the feeding platform to the film pasting station through the picking module. After the position of the optical film piece is corrected by the alignment and correction module, it is accurately pasted on the top surface of the first panel. The alignment and correction film pasting method in Step 4 includes the following steps: Step 4-1: The optical film piece is transferred above the feeding platform through the picking module. Adjust the output of the vacuum valve to control the upper suction generated by the picking module to be weaker than the lower blowing generated by the feeding platform, so that the optical film piece floats between the picking module and the feeding platform. Step 4-2: The alignment and correction module adjusts the horizontal position and vertical position of the optical film piece respectively by controlling the expansion and contraction of the first limit plate of the X-axis adjustment module and the second limit plate of the Y-axis adjustment module. Step 4-3: After the adjusted optical film piece corresponds to the position of the first panel, control the front end of the picking module to tilt downward so that the optical film piece is pasted on the top surface of the first panel from front to back in sequence. Step 4-4: The roller module of the robotic arm mechanism descends under the action of the cylinder and contacts the top surface of the first panel. As the feeding platform resets, the roller surface of the roller module rolls over the surface of the optical film piece from front to back in sequence to discharge the air between the optical film piece and the first panel and stabilize the adhesion between the optical film piece and the first panel. Step 5: The first transfer mechanism transfers the first panel processed in Step 4 on the feeding platform to the feeding station of the rotating platform of the rotating platform mechanism. After the rotating motor assembly controls the rotating platform to rotate 180° around the center, the first panel is transferred to the film tearing station of the rotating platform. Step 6: The film tearing module displaces along the third bracket to above the film tearing station, clamps the release film on the optical film piece, and then moves along the third bracket to the side away from the film tearing station to tear the release film from the top surface of the optical film piece. Step 7: The piston rod of the telescopic cylinder of the flipping mechanism extends, transfers the first panel processed in Step 6 from the film tearing station of the rotating platform mechanism to the flipping plate, and then flips 180° and transfers it to the feeding platform of the feeding mechanism, and adjusts the position through several limit pieces. Step 8: The worker places the second panel on the third feeding platform and adjusts the position through several limit pieces. Step 9: The second feeding mechanism transfers the second panel after the position adjustment in Step 8 from the third feeding platform to the pre-pressing platform, and the second transfer mechanism transfers the first panel after the position adjustment in Step 7 above the pre-pressing platform and pre-presses and adheres it to the second panel. Step 10: The third transfer mechanism transfers the product after the pre-pressing treatment in Step 9 to the heating bottom plate of the lower cavity module of the heating and pressing mechanism, and the lower cavity module moves along the guide rail provided on the bottom plate under the drive of the motor to the heating and pressing station. Step 11: The lifting cylinder controls the upper cavity module to descend, and the bottom surface of the heating and pressing cavity closely cooperates with the top surface of the lower cavity mechanism to form a sealed space, and vacuum pumping is performed on the sealed space. Step 12: When the sealed space reaches the set vacuum degree and after a set time, the pressing component controls the heating plate to descend and fit with the top surface of the heating bottom plate to press the product. Step 13: After the product pressing is completed, the upper cavity module and the lower cavity module are reset respectively. The third transfer mechanism transfers the product after the pressing in Step 12 to the discharge conveyor belt assembly and then outputs it to the next process.

2. The bonding method of the double-sided bonding device according to claim 1, characterized in that, The die-cutting method of the hot melt adhesive film roll in Step 1 includes the following steps: Step 1-1: Place the hot melt adhesive film roll with the release film and the protective film adhered to both sides into the die-cutting equipment and feed it through the discharge end of the die-cutting equipment. Step 1-2: Perform roll-to-roll die-cutting of a set size between the discharge end and the winding end of the die-cutting equipment. During the die-cutting process, the protective film is not penetrated, and a plurality of optical film pieces are formed and evenly arranged on the protective film. The release film is also adhered to the optical film pieces. Step 1-3: Taking the protective film as the base band, the winding end of the die-cutting equipment winds the hot melt adhesive film roll into an optical film roll.

3. The bonding method of the double-sided bonding device according to claim 1, characterized in that Between Step 6 and Step 7, there is also a release film detection and recycling method, including the following steps: Step 6-1: The release film tearing assembly moves above the recycling station, and the sensor of the recycling clamping mechanism checks whether it senses the release film. If not, jump to Step 6; if so, proceed to the next step. Step 6-2: The finger cylinder of the recycling clamping mechanism works, and the two clamping rods cooperate to clamp the release film on the release film tearing assembly. Step 6-3: After the rotating table rotates a set angle, the finger cylinder works, and the two clamping rods throw the release film into the recycling box.

4. The laminating method of the double-sided laminating device according to claim 1, characterized in that, Between Step 9 and Step 10, there is also Step 9-1: After the pre-pressing is completed, the observation mirror module moves to the pre-pressing platform under the drive of the motor, and the worker observes the product through the observation mirror module.

5. The laminating method of the double-sided laminating device according to claim 1, characterized in that Between Step 10 and Step 11, there is also Step 10-1: Before the lower cavity module moves to the heating and pressing station, the distance sensor detects the distance from the heating bottom plate, and the height adjustment component adjusts the initial height of the heating plate according to the detected distance and the preset value.

6. The bonding method of the two-sided bonding device according to claim 1, characterized in that, The pressing method of the product in Step 12 includes the following steps: Step 12-1: After the set vacuum degree is reached in the sealed cavity, the heating plate descends a first set distance under the drive of the pressing module for the first pressing. Step 12-2, the lifting cylinder controls the upper cavity module to rise by a second set distance, creating a gap between the bottom surface of the heating and pressurizing cavity and the top surface of the lower cavity mechanism to form a non-hermetic cavity. The heating plate descends by a second set distance under the drive of the pressurizing module for the second pressing.

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