A method for coating the four peripheral edges of a photovoltaic glass

Abstract

The application discloses a kind of photovoltaic glass four perimeter edge glue coating method, glue coating is carried out on the four perimeter edge of photovoltaic glass by glue coating equipment, and glue coating equipment includes conveying mechanism, positioning mechanism and glue coating mechanism, two independent operation handling mechanisms are arranged in conveying mechanism, conveying mechanism is divided into first conveying section and second conveying section, and there are two glue coating heads in glue coating mechanism.When photovoltaic glass is conveyed into first conveying section and positioned by positioning mechanism, the handling mechanism waiting below first conveying section is fixed and jacks up photovoltaic glass to separate from first conveying section, and translates and advances to the below of glue coating head to carry out glue coating, when the four perimeter edge of photovoltaic glass is all coated with glue, the handling mechanism is lowered, so that photovoltaic glass falls back to conveying mechanism and is conveyed out by conveying mechanism.The application has the advantages of simple and compact structure, high glue coating efficiency and good glue coating quality, and can further meet the requirements of small floor area and fast production rhythm of industrialized assembly line.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module production line technology, and specifically to a method for applying adhesive to the edges of photovoltaic glass. Background Technology

[0002] The photovoltaic (PV) industry is a new type of energy industry. As we all know, materials, energy, and information are the three pillars supporting modern civilization. In today's society, energy is scarce, and solar energy, as a new, sustainable, and environmentally friendly energy source, plays a crucial role. Solar modules, as the smallest unit in a solar power generation system, are produced in the PV industry. A PV module refers to the smallest indivisible assembly of photovoltaic modules with external encapsulation and internal connections, capable of providing DC output independently.

[0003] To improve the water resistance and lifespan of photovoltaic (PV) modules, butyl sealant needs to be applied to the perimeter of the glass surface. On existing sealant application lines, the glass is conveyed to the sealant application unit via a transport mechanism. The transport mechanism holds the glass and, in conjunction with the sealant application head, applies sealant around its perimeter. However, most sealant application equipment has only one application head. This means the head must circle the entire edge of the glass during application, resulting in low efficiency. Furthermore, the transport mechanism can only handle one piece of glass at a time. After application, the mechanism must return to pick up the next piece and continue applying sealant, further complicating the process and making it unsuitable for the speed of assembly line production, failing to meet the needs of modern industrial production. Summary of the Invention

[0004] The purpose of this invention is to provide a method for applying adhesive to the edges of photovoltaic glass, which effectively improves the adhesive application efficiency and can meet the production speed requirements of assembly lines.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A method for applying adhesive to the edges of photovoltaic glass involves applying adhesive to the edges of the photovoltaic glass using an adhesive application device. The device includes a conveying mechanism for transporting the photovoltaic glass, a positioning mechanism for positioning the photovoltaic glass, and an adhesive application mechanism for applying the adhesive. The conveying mechanism is divided into a first conveying section and a second conveying section. The conveying mechanism also includes two independently operating and non-interfering transport mechanisms that move back and forth between the first and second conveying sections to drive the translation and lifting of the photovoltaic glass. The adhesive application mechanism includes an adhesive application head drive module longitudinally positioned above and near the junction of the first and second conveying sections, and two downward-facing adhesive application heads driven by the adhesive application head drive module, each capable of moving independently longitudinally. The adhesive application method includes the following steps:

[0007] Step 1: A piece of photovoltaic glass is conveyed into the first conveyor section by the conveyor belt of the first conveyor section as the current photovoltaic glass.

[0008] Step 2: The positioning mechanism positions the current photovoltaic glass;

[0009] Step 3: One of the conveying mechanisms waiting below the first conveyor section is fixed as the current conveying mechanism and drives the current photovoltaic glass, so that the current photovoltaic glass is disengaged from the conveyor belt of the first conveyor section and the front edge of the current photovoltaic glass is exactly below the two glue application heads.

[0010] Step 4: Under the drive of the adhesive application head drive module, the two adhesive application heads apply adhesive as they move longitudinally from the middle part of the front edge of the current photovoltaic glass towards the two front top corners of the current photovoltaic glass.

[0011] Step 5: When the two adhesive application heads reach the left and right edges of the current photovoltaic glass, the two adhesive application heads stop moving. The current conveying mechanism then drives the current photovoltaic glass to move forward in a translational manner to the second conveying section, so that the two adhesive application heads that have stopped moving simultaneously apply adhesive to the left and right edges of the photovoltaic glass during the forward translation of the current photovoltaic glass.

[0012] Step 6: When the current photovoltaic glass moves to the point where the rear edge of the current photovoltaic glass is directly below the two glue application heads, the current transport mechanism stops driving the current photovoltaic glass. Then, under the drive of the glue application head drive module, the two glue application heads apply glue to the rear edge of the current photovoltaic glass from the two rear corners along the longitudinal direction towards the middle while moving.

[0013] Step 7: After completing the adhesive application on the rear edge of the current photovoltaic glass, the current transport mechanism drives the current photovoltaic glass back onto the conveyor belt of the second transport section; then the conveyor belt of the second transport section transports the current photovoltaic glass out of the second transport section, and the unloaded current transport mechanism returns to the first transport section, thus completing the adhesive application process for one piece of current photovoltaic glass.

[0014] In step 5, while the current photovoltaic glass moves forward to the second conveyor section, the next photovoltaic glass, as the new current photovoltaic glass, is conveyed into the first conveyor section by the conveyor belt of the first conveyor section to perform new steps 1 and new steps 2. Another handling mechanism also waits below the first conveyor section as the new current handling mechanism, ready to perform new steps 3 to new steps 7 in sequence.

[0015] In a preferred embodiment of the present invention, the positioning mechanism has a front positioning stop disposed near the junction of the first conveying segment and the second conveying segment, and the two glue applicators are located above the front positioning stop on one side biased toward the first conveying segment.

[0016] In step 3, the current transport mechanism lifts the current photovoltaic glass in the first conveyor section to disengage the current photovoltaic glass from the conveyor belt of the first conveyor section and to place the front edge of the current photovoltaic glass directly below the two glue application heads.

[0017] In step 7, the transport mechanism first translates and then descends in the second conveyor section to drive the current photovoltaic glass back onto the conveyor belt of the second conveyor section. After the rear edge of the current photovoltaic glass is translated to completely pass the front positioning stop, another transport mechanism waiting below the first conveyor belt fixes and lifts the next photovoltaic glass that has been transported into the first conveyor section and positioned in the new step 3.

[0018] In a preferred embodiment of the present invention, the positioning mechanism has a front positioning stop disposed near the junction of the first conveying segment and the second conveying segment, and the two glue applicators are located above the front positioning stop and biased toward the second conveying segment.

[0019] In step 3, the current transport mechanism first lifts and then translates in the first conveyor section to drive the current photovoltaic glass so that the current photovoltaic glass is disengaged from the conveyor belt of the first conveyor section and the front edge of the current photovoltaic glass is located directly below the two glue application heads.

[0020] In step 6, when the rear edge of the current photovoltaic glass is directly below the two adhesive application heads, while adhesive is being applied to the rear edge of the current photovoltaic glass, the other conveying mechanism fixes and lifts the next photovoltaic glass that has been conveyed into the first conveying section and positioned in the new step 3.

[0021] In step 7, the adhesive is applied to the rear edge of the current photovoltaic glass. The current transport mechanism first translates and then lowers the current photovoltaic glass in the second transport section so that the current photovoltaic glass falls back onto the conveyor belt of the second transport section. While the current transport mechanism is translating the current photovoltaic glass in the second transport section, another transport mechanism translates the next photovoltaic glass in the new step 3 so that the front edge of the next photovoltaic glass is directly below the two adhesive application heads.

[0022] In one embodiment of the present invention, the dispensing openings of both dispensing heads are round.

[0023] In another embodiment of the present invention, both of the adhesive applicators have flat applicator openings, and the adhesive applicators are used with the long side of the applicator opening perpendicular to the edge of the photovoltaic glass.

[0024] In a preferred embodiment of the present invention, when the adhesive applicator stops moving and the current photovoltaic glass stops moving, the applicator rotates 90° to apply a right angle at the top corner of the current photovoltaic glass.

[0025] In a preferred embodiment of the present invention, the coating head rotates 90° while the coating head is moving and the current photovoltaic glass is moving to apply a rounded corner at the top corner of the current photovoltaic glass.

[0026] In a preferred embodiment of the present invention, during the process of applying adhesive to the front edge of the current photovoltaic glass, one of the two adhesive application heads starts from the midpoint of the front edge and moves towards its own side to apply adhesive, while the other adhesive application head does not apply adhesive at first and follows the other adhesive application head until the adhesive it applies can connect with the starting point of the adhesive applied by the other adhesive application head, at which point it starts to move back towards its own side to apply adhesive.

[0027] In a preferred embodiment of the present invention, when the two adhesive applicators meet during the process of applying adhesive to the rear edge of the current photovoltaic glass, one of the adhesive applicators stops applying adhesive and moves back towards its own side. At the same time, the other adhesive applicator follows the other adhesive applicator and continues to move towards the opposite side and continues to apply adhesive until the adhesive applied aligns with the termination point of the adhesive applied by the other adhesive applicator. At this point, both adhesive applicators stop moving, and the other adhesive applicator stops applying adhesive.

[0028] In a preferred embodiment of the present invention, the conveying mechanism includes a horizontal drive mechanism and a plurality of longitudinally spaced adsorption tray units driven by the horizontal drive mechanism, wherein the adsorption tray units of one conveying mechanism are spaced apart between the adsorption tray units of another conveying mechanism.

[0029] In a preferred embodiment of the present invention, the horizontal drive mechanism includes spaced-apart long guide rails, slides fixed on the corresponding long guide rails, a motor, multiple sets of pulleys, multiple synchronous belts, and a drive shaft. The motor is fixed on the frame of the adhesive coating equipment. Each set of pulleys is fixed on one side of the corresponding long guide rail. Each synchronous belt is sleeved on the corresponding pulley set. The drive pulleys in all the pulley sets are connected to the motor through the drive shaft. Each slide is fixedly connected to the corresponding synchronous belt. The adsorption tray unit is fixed on the slide.

[0030] In a preferred embodiment of the present invention, the adsorption tray unit includes vertical guide rails spaced apart on the surface of the slide, a vertical slider on the vertical guide rails, a horizontal adsorption tray extending in the conveying direction fixed on the vertical slider, a horizontal guide rail on the surface of the slide, a horizontal sliding foot fixed on the horizontal guide rails, a lifting adjustment block fixed on the horizontal sliding foot, and a power assembly fixed on the slide for driving the lifting adjustment block. The lifting adjustment block has a rail surface, which is divided into an upper horizontal rail surface, a lower horizontal rail surface, and a slope connecting the upper horizontal rail surface and the lower horizontal rail surface. The bottom of the adsorption tray is equipped with rollers supported by the rail surface.

[0031] In a preferred embodiment of the present invention, the glue applicator drive module is provided with a rotary drive mechanism for driving the glue applicator to rotate.

[0032] In a preferred embodiment of the present invention, the glue application head drive module is provided with a lifting drive mechanism for raising and lowering the glue application head, for adjusting a suitable glue application height.

[0033] By adopting the above technical solution, the present invention has the following beneficial effects:

[0034] 1. The two adhesive application heads only need to travel longitudinally to apply adhesive to the longitudinal edges of the photovoltaic glass, while stopping laterally. The photovoltaic glass is driven laterally by a conveying mechanism, and adhesive is applied to the left and right edges during this lateral movement. This allows for simultaneous forward conveying and adhesive application of the photovoltaic glass. Furthermore, while the left and right edges of the photovoltaic glass are being coated, the next photovoltaic glass is simultaneously conveyed in. While the rear edge of the photovoltaic glass is being coated, the next photovoltaic glass is simultaneously positioned and lifted. In other words, the entire adhesive application process achieves simultaneous adhesive application by both heads without the need for lateral return travel. The transmission and positioning of the next photovoltaic glass are completed while the previous one is being coated, achieving a truly seamless connection between the front and rear photovoltaic glass adhesive application with almost no waiting time. This significantly reduces the time required for adhesive application to the four edges of the photovoltaic glass and greatly improves the adhesive application efficiency of the equipment.

[0035] 2. The conveying mechanism uses a motor-driven adsorption pallet unit to carry the photovoltaic glass on a long guide rail, ensuring that the photovoltaic glass is conveyed quickly, smoothly, and accurately in position during the adhesive coating process, thereby improving the adhesive coating quality of the photovoltaic glass.

[0036] 3. The adsorption tray unit uses a lifting adjustment block to adjust the lifting of the adsorption tray, ensuring that the adsorption tray can be lifted and lowered quickly and accurately.

[0037] 4. By using two conveying mechanisms to alternately transport photovoltaic glass, the coating of photovoltaic glass can be carried out continuously. After the current photovoltaic glass is coated, the coating of the next photovoltaic glass can be carried out continuously and quickly, which further improves the rhythm and efficiency of the coating process.

[0038] In summary, the adhesive application method of the present invention has the advantages of high adhesive application efficiency and good adhesive application quality, thus meeting the production requirements of industrialized production lines. Attached Figure Description

[0039] The invention will now be further described with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of the adhesive coating equipment of the present invention;

[0041] Figure 2 This is a schematic diagram of the conveying mechanism of the present invention;

[0042] Figure 3 This is a schematic diagram of the positioning mechanism of the present invention;

[0043] Figure 4 This is a schematic diagram of the transport mechanism of the present invention;

[0044] Figure 5 yes Figure 2 An enlarged view of A shown;

[0045] Figure 6 This is a schematic diagram showing the current photovoltaic glass being positioned in the first transmission segment in Embodiment 1 of the present invention;

[0046] Figure 7 This is a schematic diagram of the photovoltaic glass in Embodiment 1 of the present invention when the front edge is directly below the two adhesive applicators;

[0047] Figure 8 This is a schematic diagram of the photovoltaic glass in Embodiment 1 of the present invention when the rear edge is located directly below the two adhesive applicators;

[0048] Figure 9 This is a schematic diagram of Embodiment 1 of the present invention, in which the rear edge of the current photovoltaic glass is coated with glue and moved forward, while the next photovoltaic glass is lifted by another conveying mechanism and its front edge is located directly below the two glue-applying heads.

[0049] Figure 10 This is a schematic diagram of the photovoltaic glass after it has been lowered and returned to the second conveyor section by the current handling mechanism in Embodiment 1 of the present invention;

[0050] Figure 11 This is a schematic diagram showing the two adhesive applicators of the present invention positioned at the center of the front edge of the current photovoltaic glass;

[0051] Figure 12 This is a schematic diagram of the two adhesive applicators of the present invention moving to the two front corners of the current photovoltaic glass;

[0052] Figure 13 This is a schematic diagram of the starting position of the two adhesive applicators at the front edge of the photovoltaic glass according to the present invention;

[0053] Figure 14 This is a schematic diagram of the two adhesive applicators of the present invention following the front edge of the photovoltaic glass until the adhesive applied by the two adhesive applicators can be aligned.

[0054] Figure 15 This is a schematic diagram of the two adhesive applicators of the present invention applying adhesive to the two front corners of the front edge;

[0055] Figure 16 This is a schematic diagram of the two adhesive applicators of the present invention located at the two rear corners of the rear edge of the photovoltaic glass;

[0056] Figure 17 This is a schematic diagram of the two glue-applying heads of the present invention meeting at the middle position of the rear edge;

[0057] Figure 18 This is a schematic diagram of the two adhesive applicators of the present invention following the rear edge of the photovoltaic glass until the adhesive applied by the two adhesive applicators can be aligned.

[0058] Figure 19 This is a timing diagram of the photovoltaic glass coating process in Embodiment 1 of the present invention;

[0059] Figure 20 This is a schematic diagram showing the current photovoltaic glass being positioned in the first transmission segment in Embodiment 2 of the present invention;

[0060] Figure 21 This is a schematic diagram of the current photovoltaic glass in Embodiment 2 of the present invention when the front edge is directly below the two adhesive applicators;

[0061] Figure 22 This is a schematic diagram of the current photovoltaic glass in Embodiment 2 of the present invention when the rear edge is located directly below the two adhesive applicators;

[0062] Figure 23 This is a schematic diagram of Embodiment 2 of the present invention, in which the rear edge of the current photovoltaic glass is being coated with adhesive while the next photovoltaic glass is being lifted by another conveying mechanism;

[0063] Figure 24 This is a schematic diagram of the photovoltaic glass after it has been lowered and returned to the second conveying section by the current handling mechanism in Embodiment 2 of the present invention;

[0064] Figure 25 This is a timing diagram of the photovoltaic glass coating process in Embodiment 2 of the present invention. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] Example 1

[0067] This invention relates to a method for applying adhesive to the four edges of photovoltaic glass, wherein adhesive is applied to the four edges of the photovoltaic glass using an adhesive application device.

[0068] Please see Figure 1 and Figure 2 As shown, the adhesive coating equipment includes a frame 10, a conveying mechanism 20 mounted on the frame 10 for conveying photovoltaic glass 9, an adhesive coating mechanism 60 for applying adhesive around the photovoltaic glass 9, and two independent and non-interfering handling mechanisms (i.e., the first handling mechanism 30 and the second handling mechanism 40) mounted in the conveying mechanism 20 for moving and lifting the photovoltaic glass 9.

[0069] The conveying mechanism 20 is divided into a first conveying section 22 and a second conveying section 23, which operate independently. Both the first conveying section 22 and the second conveying section 23 are composed of multiple conveyor belts 21 that are longitudinally spaced on the frame 10.

[0070] Combination Figure 4 and Figure 5 As shown, both the first transport mechanism 30 and the second transport mechanism 40 include a horizontal drive mechanism 12 and a plurality of adsorption tray units 13 arranged longitudinally at intervals. The horizontal drive mechanism 12 is connected to the plurality of corresponding adsorption tray units 13, and is used to drive the plurality of adsorption tray units 13 to move forward and backward in the transport mechanism 20, that is, to move forward from the first transport section 22 to the second transport section 23, or to move backward from the second transport section 23 to the first transport section 22. The adsorption tray units 13 of the first transport mechanism 30 are spaced apart from the adsorption tray units 13 of the second transport mechanism 40. Thus, when the first transport mechanism 30 and the second transport mechanism 40 move in opposite horizontal directions, they do not interfere with each other.

[0071] The horizontal drive mechanism 12 includes multiple long guide rails 37, multiple slides 32, a motor 311, multiple sets of pulleys 312, multiple synchronous belts 313, and a drive shaft 314.

[0072] Multiple long guide rails 37 are spaced apart on the frame 10. In this embodiment, there are eight long guide rails 37. Each slide 32 is mounted on a corresponding long guide rail 37. The bottom surface of each slide 32 is provided with multiple sliding feet 38, allowing the slide 32 to move along the long guide rail 37. In the first conveying mechanism 30, each adsorption pallet unit 13 is fixed to a slide 32 on a corresponding long guide rail 37 (i.e., long guide rails numbered L1, L3, L5, and L7). In the second conveying mechanism 40, each adsorption pallet unit 13 is fixed to a slide on a long guide rail 37 (i.e., long guide rails numbered L2, L4, L6, and L8). The motor 311 is fixed to the frame 10. Each set of pulleys 312 is fixed to one side of a corresponding long guide rail 37. A synchronous belt 313 is fitted onto the corresponding pulley set 312. The drive pulleys in all pulley sets 312 are connected to the motor 311 via a drive shaft 314. The motors and drive shafts of the first and second conveying mechanisms 30 are located at the front and rear ends of the conveying mechanism 20, respectively. Each slide 32 is fixedly connected to a corresponding synchronous belt 313. Thus, the motor 311 drives the pulley group 312 to rotate, which in turn drives the synchronous belt 313 to rotate, causing the slide 32 to move, thereby driving the adsorption tray units 13 on each slide 32 to move synchronously. This horizontal drive mechanism ensures that the photovoltaic glass 9 is conveyed smoothly, accurately, and quickly during the adhesive coating process. Furthermore, the translational speed is adjustable to adapt to different speed requirements during or outside of adhesive coating, thereby improving adhesive coating quality and operational efficiency.

[0073] The adsorption tray unit 13 includes a power assembly 331 mounted on a slide 32, a lifting adjustment block 332 driven by the power assembly 331, and an adsorption tray 34. A row of suction nozzles 38 for adsorbing photovoltaic glass is horizontally spaced on the adsorption tray 34. Horizontal guide rails 334 are provided on the surface of the slide 32. Horizontal sliding feet 335 are provided on the horizontal guide rails 334. The lifting adjustment blocks 332 are fixed to the horizontal sliding feet 335 via a sliding plate 333. Two lifting adjustment blocks 332 are provided, fixed to the surface of the sliding plate 333 at intervals. The power assembly 331 can be electrically driven, pneumatically driven, or hydraulically driven. In this embodiment, the power assembly 331 is preferably a motor-driven screw and nut mechanism. The power assembly 331 includes a motor 3311, a screw 3312, and a nut 3313. The motor 3311 is mounted on the slide 32 via a motor bracket. The nut 3313 is fixed to the sliding plate 333. The lead screw 3312 is connected to the motor 3311, and the nut 3313 is fitted onto the lead screw 3312.

[0074] The adsorption tray unit 13 also includes vertical guide rails 361 spaced apart on the surface of the slide block 32 via guide rail brackets 36. All vertical guide rails 361 are fixed to the same side of the corresponding guide rail brackets 36. Vertical sliders 362 are provided on the vertical guide rails 361. The adsorption tray 34 is fixed to the corresponding vertical slider 362 via a tray bracket 341. Rollers 35 are also provided on the tray bracket 341 at the position corresponding to the lifting adjustment block 332. The two rollers 35 are used to move on the lifting adjustment block 332 and support the adsorption tray 34. Moreover, the use of two rollers 35 can effectively balance the load, so that the adsorption tray 34 remains horizontal when supporting the photovoltaic glass 9. The lifting adjustment block 332 has a rail surface, which is divided into a lower horizontal rail surface 3322 and an upper horizontal rail surface 3321 higher than the lower horizontal rail surface 3322. Using the lifting adjustment block 332, the adsorption tray 34 can be quickly raised and lowered, and the raising and lowering position is accurate. The upper horizontal rail surface 3321 and the lower horizontal rail surface 3322 are connected by an inclined slope 3323. When the roller 35 is located on the upper horizontal support rail surface 3321 (i.e., the conveying mechanism is in a high position), the adsorption surface of the adsorption plate 34 is higher than the surface of the conveyor belt 21 in the conveying mechanism 20, causing the photovoltaic glass supported on the adsorption plate 34 to detach from the conveyor belt. When the roller 35 is located on the lower horizontal support rail surface 3322 (i.e., the conveying mechanism is in a low position), the adsorption surface of the adsorption plate 34 is lower than the surface of the conveyor belt 21 in the conveying mechanism 20, allowing the photovoltaic glass 9 supported on the adsorption plate 34 to fall back onto the conveyor belt.

[0075] Combination Figure 3 As shown, the adhesive coating equipment includes a positioning mechanism 50 for positioning the photovoltaic glass 9 in the front, back, left, and right positions when it is conveyed to the first conveying section of the conveying mechanism. This positioning mechanism 50 includes a front stop wheel 56 (serving as a front positioning stop) located at the front end of the first conveying section 22, opposing horizontal cylinders 51 located on the left and right sides of the first conveying section 22, side stop wheels 52 driven by the horizontal cylinders 51 (the horizontal cylinders 31 and the side stop wheels 52 constitute side positioning stops), a lifting cylinder 54 located at the rear of the first conveying section 22, a telescopic cylinder 53 installed at the output end of the lifting cylinder 54, and a rear stop wheel 55 driven by the telescopic cylinder 53 (the lifting cylinder 54, the telescopic cylinder 53, and the rear stop wheel 55 constitute a rear positioning stop). This structure is used because the strokes of the two horizontal cylinders 51 are the same, which pushes the photovoltaic glass towards the center, thereby achieving left and right centering of the photovoltaic glass. The lifting cylinder 54 raises the rear stop wheel 55 behind the photovoltaic glass, and then the telescopic cylinder 53 drives the rear stop wheel 55 to push the photovoltaic glass 9 forward until it touches the front stop wheel 56, thereby achieving precise positioning of the front and rear positions of the photovoltaic glass. By using cylinder drive, the photovoltaic glass 9 can be positioned quickly, improving positioning efficiency.

[0076] The glue application mechanism 60 includes a glue applicator 66 and a glue application head drive module 62 longitudinally mounted above the conveying mechanism 20 via a glue application head frame 61. The glue applicator 66 has a first glue application head 63 and a second glue application head 64 mounted on the glue application head drive module 62. The first glue application head 63 and the second glue application head 64 can be driven by the glue application head drive module 62 and move independently longitudinally. In this embodiment, the glue application head drive module 62 employs dual linear motors to achieve independent longitudinal movement of the first glue application head 63 and the second glue application head 64. In this embodiment, the glue application nozzles of the first glue application head 63 and the second glue application head 64 face downwards and are both circular.

[0077] In this embodiment, as Figure 6 As shown, the two adhesive application heads are located above the front guide wheel 56, biased towards the first conveyor section. With this structure, when the two application heads are applying adhesive to the rear edge of the current photovoltaic glass 9a, the next photovoltaic glass 9b, which is being conveyed to the first conveyor section 22, can be positioned by the positioning mechanism 50. Simultaneously, another transport mechanism waits below the first conveyor section 22. Only after the rear edge of the current photovoltaic glass 9a has been coated and moved forward a short distance so that the current photovoltaic glass 9a has completely passed the front guide wheel 56 can the other transport mechanism lift the next photovoltaic glass 9b.

[0078] In this invention, the adhesive 15 used in the coating equipment is butyl rubber. Since butyl rubber is solid at room temperature, the application temperature is approximately 110°C to 150°C. Therefore, it is necessary to maintain a certain temperature in all components or pipelines between the adhesive container and the coating head. The two coating heads in this equipment only need to move longitudinally over a short distance, without lateral movement. This shortens the length of the heating pipeline, which helps to increase the flow rate of the adhesive and reduce the energy consumption required for heat preservation.

[0079] The method for applying adhesive to the edges of photovoltaic glass according to the present invention includes the following steps:

[0080] Step 1: A piece of photovoltaic glass 9, as the current photovoltaic glass 9a, is conveyed from the preceding conveyor belt (not shown in the figure) into the first conveyor section 22 by the conveyor belt 21 of the first conveyor section 22.

[0081] Step 2: The positioning mechanism 50 positions the current photovoltaic glass 9a in the front, back, left, and right directions, such as... Figure 6 As shown. After positioning, the front edge of the photovoltaic glass 9a is now directly below the first adhesive applicator 63 and the second adhesive applicator 64.

[0082] Step 3: The first transport mechanism 30, positioned below the first conveyor section 22, acts as the current transport mechanism, adsorbing and fixing the current photovoltaic glass 9a. Then, the positioning mechanism 50 retracts to its original position. Next, the current transport mechanism lifts the current photovoltaic glass 9a, causing it to detach from the conveyor belt 21 of the first conveyor section 22. At this point, the first transport mechanism 30 stops moving. Figure 7 As shown.

[0083] Step 4: The first adhesive applicator 63 and the second adhesive applicator 64, driven by the adhesive applicator drive module 62, apply adhesive to the front edge of the current photovoltaic glass 9a from the middle part along the longitudinal direction towards the two front corners of the current photovoltaic glass 9a.

[0084] It should be noted that, as Figure 11 and Figure 12 As shown, in this step, when the first adhesive applicator 63 and the second adhesive applicator 64 are in the middle of the front edge, even if the first adhesive applicator 63 and the second adhesive applicator 64 are completely close together at the middle point a4 of the front edge of the photovoltaic glass 9, the adhesive 15 applied by the two adhesive applicators can only fall on points a2 and a3. The area between points a2 and a3 (the length of which is exactly the distance between the center points of the two adhesive applicators when the two adhesive applicators are completely close together) can never be coated with adhesive.

[0085] To ensure that adhesive 15 is applied to the area between points a3 and a2 on the front edge of the photovoltaic glass 9, and that both applicator heads reach the two front corner points a1 and a5 of the photovoltaic glass 9 simultaneously, the second applicator head 64 must first begin applying adhesive from point a3, slightly to the right of the middle position a4 on the front edge, and move to the left. Meanwhile, the first applicator head 63 will not apply adhesive initially and will follow the second applicator head 63. Figure 13 As shown. When the second applicator head 64 moves to point a2 where the applied glue can fall on the front edge, the first applicator head 63 moves to point a3 where the applied glue can fall on the front edge (i.e., the glue applied by the first applicator head 63 can align with the starting point a3 of the glue applied by the second applicator head 64, as shown). Figure 14 As shown), the first adhesive applicator 63 begins to move back towards the front top corner a5 of the photovoltaic glass 9 and apply adhesive. Since the distances from position a2 to the front top corner a1 and from position a3 to the front top corner a5 are equal, and the first adhesive applicator 63 and the second adhesive applicator 64 are required to move at the same speed in the longitudinal direction, this ensures that the first adhesive applicator 63 and the second adhesive applicator 64 can simultaneously reach the front top corner a1 and the front top corner a5 of the photovoltaic glass 9. Figure 15 As shown. In this step, the two glue applicators start applying glue at a point slightly to the right. Of course, you can also start applying glue at a point slightly to the left to achieve the same effect.

[0086] Step 5: When the first adhesive applicator 63 and the second adhesive applicator 64 simultaneously reach the two front corners of the current photovoltaic glass 9a, the first adhesive applicator 63 and the second adhesive applicator 64 stop moving. Then, the first conveying mechanism 30 moves forward to drive the current photovoltaic glass 9a, so that the stopped first adhesive applicator 63 and the second adhesive applicator 64 simultaneously apply adhesive to the left and right edges of the current photovoltaic glass 9a during the forward movement of the current photovoltaic glass 9a.

[0087] like Figure 8 As shown, while the first transport mechanism 30 moves the current photovoltaic glass 9a forward to the second transport section 23, the conveyor belt 21 of the first transport section 22 transports the next photovoltaic glass 9b into the first transport section 22 (i.e., performs a new step 1), and the second transport mechanism 40 returns from the second transport section 23 in a low position and waits below the first transport section 22.

[0088] Step 6: When the two rear corners of the current photovoltaic glass 9a are translated to be directly below the first adhesive applicator 63 and the second adhesive applicator 64, the first conveying mechanism 30 stops translating the current photovoltaic glass 9a. Then, the first adhesive applicator 63 and the second adhesive applicator 64 simultaneously apply adhesive to the rear edge of the current photovoltaic glass 9a from the two rear corners along the longitudinal direction towards the middle part under the drive of the adhesive applicator drive module 62.

[0089] It should also be noted that, as Figure 16 and Figure 17 As shown, when the two adhesive applicators meet at point b4, the middle position of the rear edge of the current photovoltaic glass 9a, the first adhesive applicator 63 can only apply adhesive to point b3, and the second adhesive applicator 64 can only apply adhesive to point b2. The area between point b3 and point b2 on the rear edge of the photovoltaic glass 9 cannot be coated with adhesive.

[0090] Therefore, after the two adhesive applicators meet at point b4, the middle position of the rear edge of the photovoltaic glass 9a, the first adhesive applicator 63 needs to stop applying adhesive and move back to the right towards the rear corner point b5, while the second adhesive applicator 64 follows the first adhesive applicator 63 and continues to move towards the rear corner point b5 and apply adhesive until the adhesive applied by the second adhesive applicator 64 aligns with the end point b3 of the adhesive applied by the first adhesive applicator 63. Figure 18 As shown. At this time, both glue-applying heads stop moving, and the second glue-applying head 64 also stops applying glue 15, so that glue can also be applied to the area between point b3 and point b2 on the rear edge of the photovoltaic glass 9.

[0091] In this step, after the two adhesive applicators meet, the left applicator continues to apply adhesive to the right. Alternatively, the right applicator can continue to apply adhesive to the left after meeting, achieving the same effect. However, this continued application direction must correspond to the initial application direction in step 3, so that the end position of the adhesive application at the rear edge of the current photovoltaic glass becomes the starting position for the adhesive application at the front edge of the next photovoltaic glass.

[0092] While applying adhesive to the rear edge of the current photovoltaic glass 9a, the positioning mechanism 50 can position the next photovoltaic glass 9b that has been transferred to the first transfer section (i.e., proceed to the new step 2). However, since the rear edge of the current photovoltaic glass 9a is still blocking the front edge of the next photovoltaic glass 9b, the second transport mechanism 40 cannot lift the next photovoltaic glass 9b at this time.

[0093] Step 7: After the adhesive is applied to the rear edge of the current photovoltaic glass 9a, the first conveying mechanism 30 drives the current photovoltaic glass 9a forward a short distance, so that the current photovoltaic glass 9a completely passes the front guide wheel 56, as shown. Figure 9 As shown. Then, the first transport mechanism 30 lowers the current photovoltaic glass 9a, causing it to fall back onto the conveyor belt of the second transport section 23, and then be transported by the conveyor belt of the second transport section 23 to the subsequent transport belt (not shown in the figure) for delivery. After lowering the current photovoltaic glass, the first transport mechanism 30 returns to the first transport section 22 in a low-position, unloaded horizontal movement. Figure 10 As shown. This completes the adhesive coating process for one piece of the current photovoltaic glass 9a.

[0094] In step 7, after the current photovoltaic glass 9a has completely passed the front guide wheel 56, the second conveying mechanism 40, waiting below the first conveying section 22, immediately fixes and lifts the next photovoltaic glass 9b that has been conveyed into the first conveying section 22 and positioned. After completing the new step 3, the next photovoltaic glass 9b continues to go through new steps 3 to new steps 7. This cycle is repeated to achieve continuous adhesive coating of one photovoltaic glass after another.

[0095] To more clearly illustrate this embodiment, in conjunction with Figure 19 The timing sequence for applying adhesive to the photovoltaic glass in this embodiment will be explained.

[0096] exist Figure 19In the diagram, A represents the time it takes for the photovoltaic glass to be transported to the first conveyor segment (7 seconds). B represents the time it takes for the positioning mechanism to position the photovoltaic glass (2 seconds). C represents the waiting time for the photovoltaic glass (3 seconds) while it waits for the transport mechanism to lift it in the first conveyor segment. D represents the time it takes for the transport mechanism to fix and lift the photovoltaic glass in the first conveyor segment (2 seconds). E represents the time it takes to apply adhesive to the front edge of the photovoltaic glass (4 seconds). F represents the time it takes to apply adhesive to the left and right edges of the photovoltaic glass (7 seconds). G represents the time it takes to apply adhesive to the rear edge of the photovoltaic glass (4 seconds). H represents the time it takes for the transport mechanism to move the photovoltaic glass forward a short distance after the rear edge is coated (1 second). I represents the time it takes for the transport mechanism to descend with the photovoltaic glass in the second conveyor segment (2 seconds). J represents the time it takes for the transport mechanism to return from the second conveyor segment to the first conveyor segment (7 seconds).

[0097] from Figure 19 As can be seen, while the left and right edges of the current photovoltaic glass 9a are being coated with adhesive, the next photovoltaic glass 9b is being conveyed into the first conveyor section 22. During the adhesive coating process on the rear edge of the current photovoltaic glass 9a, the next photovoltaic glass 9b is positioned and waiting. After the adhesive coating on the rear edge of the current photovoltaic glass 9a is completed, it takes time (H time) for the current photovoltaic glass 9a to move forward a short distance so that it completely passes the front guide wheel 56, and time (D time) for the next photovoltaic glass 9b to be lifted in the first conveyor section before the adhesive coating on the front edge of the next photovoltaic glass 9b can begin. The entire adhesive coating cycle is 18 seconds, which is very short and meets the production requirements of an industrial assembly line. The descent of the current photovoltaic glass 9a in the second conveyor section and the return of the unloaded transport mechanism from the second conveyor section to the first conveyor section are both completed during the lifting and adhesive coating process of the next photovoltaic glass 9b, without consuming additional time or affecting the adhesive coating cycle of the photovoltaic glass.

[0098] Example 2

[0099] Combination Figures 20-24As shown, this embodiment is an improvement on embodiment 1. Two adhesive application heads are positioned above the front guide wheel 56, biased towards the second conveyor section. With this structure, when the two adhesive application heads are applying adhesive to the rear edge of the current photovoltaic glass 9a, the current photovoltaic glass 9a has completely passed the front guide wheel 56, and will not interfere with the rising of the next photovoltaic glass 9b in the first conveyor section. Therefore, while the two adhesive application heads are applying adhesive to the rear edge of the current photovoltaic glass 9a, the next photovoltaic glass 9b conveyed to the first conveyor section can be positioned by the positioning mechanism 50 and then immediately lifted by another conveying mechanism waiting below the first conveyor section 22. That is, while applying adhesive to the rear edge of the current photovoltaic glass 9a, the positioning and lifting of the next photovoltaic glass 9b in the first conveyor section 22 can be completed. Compared with embodiment 1, this almost achieves a seamless connection between the completion of adhesive application to the current photovoltaic glass 9a and the start of adhesive application to the next photovoltaic glass 9b, further improving the adhesive application efficiency of the equipment.

[0100] However, since the two adhesive application heads are located above the front guide wheel 56 on the side biased towards the second conveyor section, after the photovoltaic glass 9a is lifted, it is not yet directly below the two adhesive application heads. Therefore, after the photovoltaic glass 9a is lifted by the conveying mechanism, it still needs to be driven by the conveying mechanism to move a small distance so that the front edge of the photovoltaic glass 9a is directly below the two adhesive application heads. That is, in step 3 of this embodiment, the first conveying mechanism 30 first lifts and then moves in the first conveyor section to drive the photovoltaic glass 9a so that the photovoltaic glass 9a is disengaged from the conveyor belt 21 of the first conveyor section 22 and the front edge of the photovoltaic glass 9a is directly below the two adhesive application heads.

[0101] Furthermore, in step 6, when the rear edge of the current photovoltaic glass 9a is directly below the two adhesive application heads, while adhesive is being applied to the rear edge of the current photovoltaic glass 9a, the second conveying mechanism 40 fixes and lifts the next photovoltaic glass 9b that has been conveyed into the first conveying section 22 and positioned in the new step 3.

[0102] To prevent interference between the front and rear photovoltaic glass 9 during translation, the current photovoltaic glass 9a needs to be translated forward a short distance after its rear edge is coated. Specifically, in step 7, after the adhesive is applied to the rear edge of the current photovoltaic glass 9a, the first transport mechanism 30 first translates and then lowers the current photovoltaic glass 9a in the second conveyor section 23 so that it falls back onto the conveyor belt 21 of the second conveyor section 23. Then, it is conveyed by the conveyor belt of the second conveyor section 23 to the subsequent conveyor belt (not shown in the figure) and transported out. After lowering the current photovoltaic glass 9a, the first transport mechanism 30 returns to the first conveyor section 22 in a low-position, unloaded translation.

[0103] To further save time, the short translation of the current photovoltaic glass 9a after the adhesive is applied to its rear edge can be synchronized with the short translation of the next photovoltaic glass 9b before the adhesive is applied to its front edge. That is, in the current step 7, while the first transport mechanism 30 is translating the current photovoltaic glass 9a with the adhesive applied to its rear edge forward in the second transport section 40, the second transport mechanism 40 is translating the next photovoltaic glass 9b in the new step 3 so that the front edge of the next photovoltaic glass 9b is directly below the two adhesive application heads.

[0104] To more clearly illustrate the practical implementation examples, in conjunction with Figure 25 The timing sequence for applying adhesive to the photovoltaic glass in this embodiment will be explained.

[0105] In the diagram, A represents the time it takes for the photovoltaic glass to be transported to the first conveyor segment (7 seconds). B represents the time it takes for the positioning mechanism to position the photovoltaic glass (2 seconds). C represents the time it takes for the transport mechanism to fix and lift the photovoltaic glass in the first conveyor segment (2 seconds). D represents the time it takes for the transport mechanism to drive the photovoltaic glass to move forward a short distance before applying adhesive to its front edge (1 second). E represents the time it takes to apply adhesive to the front edge of the photovoltaic glass (4 seconds). F represents the time it takes to apply adhesive to the left and right edges of the photovoltaic glass (7 seconds). G represents the time it takes to apply adhesive to the rear edge of the photovoltaic glass (4 seconds). H represents the time it takes for the transport mechanism to drive the photovoltaic glass forward a short distance after applying adhesive to its rear edge (1 second). I represents the time it takes for the transport mechanism to descend with the photovoltaic glass in the second conveyor segment (2 seconds). J represents the time it takes for the transport mechanism to return from the second conveyor segment to the first conveyor segment (7 seconds).

[0106] from Figure 25 As can be seen, while the left and right edges of the current photovoltaic glass 9a are being coated, the next photovoltaic glass 9b is being conveyed into the first conveyor section. During the process of applying adhesive to the rear edge of the current photovoltaic glass 9a, the next photovoltaic glass 9b is positioned and lifted. Simultaneously, while the rear edge of the current photovoltaic glass 9a is being coated with adhesive, the front edge of the next photovoltaic glass 9b is being coated with adhesive, resulting in a short translation.

[0107] from Figure 25 As can be seen, after the adhesive is applied to the rear edge of the current photovoltaic glass 9a, it takes a short period of time (i.e., time D) for the next photovoltaic glass 9b to move forward before the adhesive is applied to its front edge. The entire adhesive application cycle is 16 seconds, which is very short and meets the production requirements of an industrial production line. Meanwhile, the descent of the current photovoltaic glass 9a in the second conveyor section and the return of the unloaded transport mechanism from the second conveyor section to the first conveyor section are both completed during the adhesive application process of the next photovoltaic glass 9b, without consuming additional time or affecting the adhesive application cycle of the photovoltaic glass.

[0108] from Figure 25 and Figure 19 The comparison shows that the adhesive application time for both embodiments is 15 seconds, but the adhesive application cycle for Embodiment 1 is 18 seconds, while the adhesive application cycle for Embodiment 2 is 16 seconds. The adhesive application cycle for Embodiment 2 is 2 seconds shorter than that for Embodiment 1. This is because in Embodiment 2, the lifting action of the next photovoltaic glass in the first conveying section can be completed during the process of applying adhesive to the rear edge of the previous photovoltaic glass. In Embodiment 1, the lifting action of the next photovoltaic glass in the first conveying section can only be carried out after the adhesive has been applied to the rear edge of the previous photovoltaic glass and it has been moved forward a short distance to pass the front guide wheel 56.

[0109] Although Example 2 saves only 2 seconds in the adhesive application cycle compared to Example 1, this time saving has a significant impact on the output of a continuous production line.

[0110] Example 3

[0111] In this embodiment, the difference from Embodiment 1 is that the adhesive application nozzles of the first adhesive application head 63 and the second adhesive application head 64 are flat. To ensure that the adhesive application width is consistent across the four edges of the photovoltaic glass 9, the adhesive application head drive module 62 is also equipped with a rotary drive mechanism that drives the two adhesive application heads to rotate. In this embodiment, the rotary drive mechanism uses a rotary drive motor, and the first adhesive application head 63 and the second adhesive application head 64 are respectively fixed to the output ends of the corresponding rotary drive motors.

[0112] To ensure that the adhesive applicators are positioned so that the long side of the applicator nozzle is perpendicular to the edge of the photovoltaic glass, in step 2, during operation, when the first adhesive applicator 63 and the second adhesive applicator 64 move to the two front corners of the photovoltaic glass 9, they stop moving and applying adhesive. The rotary drive motor starts, driving the corresponding first adhesive applicator 63 and the second adhesive applicator 64 to rotate 90°. After rotating 90°, the first adhesive applicator 63 and the second adhesive applicator 64 start again and continue applying adhesive, simultaneously applying adhesive to the left and right edges of the photovoltaic glass 9. In this way, right angles are formed at the two front corners of the photovoltaic glass 9. When the two rear corners of the photovoltaic glass 9 are translated to be directly below the first adhesive applicator 63 and the second adhesive applicator 64, the translation stops, and the first adhesive applicator 63 and the second adhesive applicator 64 stop applying adhesive. Then, the rotary drive motor starts again, driving the corresponding first adhesive applicator 63 and the second adhesive applicator 64 to rotate 90°. After rotating 90°, the first adhesive applicator 63 and the second adhesive applicator 64 resume moving and applying adhesive to the rear edge of the photovoltaic glass 9. In this way, the two rear corners of the photovoltaic glass 9 will also be painted with right angles.

[0113] If rounded corners need to be applied to the two front and two rear corners of the photovoltaic glass 9, the first and second applicator heads 63 and 64 need to move forward while applying adhesive. As they approach the two front corners of the photovoltaic glass 9, the current transport mechanism drives the photovoltaic glass 9 forward, and the two rotary drive motors start simultaneously. That is, while the two applicator heads are moving and the photovoltaic glass is moving laterally forward, the corresponding first and second applicator heads 63 and 64 are rotated 90°. After rotating 90°, the applicator heads stop rotating and stopping moving. In this way, rounded corners will be applied to the two front corners of the photovoltaic glass 9.

[0114] As the two adhesive applicators approach the two rear corners of the photovoltaic glass 9, they are driven to move longitudinally, while the rotation drive motor also drives the adhesive applicators to rotate 90°. Once the adhesive applicators have rotated 90°, they stop rotating, and the current conveying mechanism also stops translating the photovoltaic glass 9. This ensures that the two rear corners of the photovoltaic glass 9 are coated with rounded corners.

[0115] In addition, the glue application head drive module can also be equipped with a lifting drive mechanism for raising and lowering the glue application head, which is used to adjust the appropriate glue application height. Specifically, the glue application head drive module 62 is also equipped with two lifting drive motors that can move independently longitudinally. Each lifting drive motor has a rotary drive motor on its output shaft. The first glue application head 63 and the second glue application head 64 are respectively fixed to the output end of the corresponding rotary drive motor.

[0116] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A method for applying adhesive to the four edges of photovoltaic glass, wherein adhesive is applied to the four edges of the photovoltaic glass using an adhesive application device, the adhesive application device comprising a conveying mechanism for conveying the photovoltaic glass, a positioning mechanism for positioning the photovoltaic glass, and an adhesive application mechanism for applying adhesive to the photovoltaic glass, characterized in that: The conveying mechanism is divided into a first conveying section and a second conveying section. The conveying mechanism also includes two independently operating and non-interfering transport mechanisms that move back and forth between the first and second conveying sections to drive the translation and lifting of the photovoltaic glass. The adhesive application mechanism includes an adhesive application head drive module longitudinally positioned above and near the junction of the first and second conveying sections, and two downward-facing adhesive application heads driven by the adhesive application head drive module, each capable of moving independently longitudinally. The adhesive application method includes the following steps: Step 1: A piece of photovoltaic glass is conveyed into the first conveyor section by the conveyor belt of the first conveyor section as the current photovoltaic glass. Step 2: The positioning mechanism positions the current photovoltaic glass; Step 3: One of the conveying mechanisms waiting below the first conveyor section is fixed as the current conveying mechanism and drives the current photovoltaic glass, so that the current photovoltaic glass is disengaged from the conveyor belt of the first conveyor section and the front edge of the current photovoltaic glass is exactly below the two glue application heads. Step 4: Under the drive of the adhesive application head drive module, the two adhesive application heads apply adhesive as they move longitudinally from the middle part of the front edge of the current photovoltaic glass towards the two front top corners of the current photovoltaic glass. Step 5: When the two adhesive application heads reach the left and right edges of the current photovoltaic glass, the two adhesive application heads stop moving. The current conveying mechanism then drives the current photovoltaic glass to move forward in a translational manner to the second conveying section, so that the two adhesive application heads that have stopped moving simultaneously apply adhesive to the left and right edges of the photovoltaic glass during the forward translation of the current photovoltaic glass. Step 6: When the current photovoltaic glass moves to the point where the rear edge of the current photovoltaic glass is directly below the two glue application heads, the current transport mechanism stops driving the current photovoltaic glass. Then, under the drive of the glue application head drive module, the two glue application heads apply glue to the rear edge of the current photovoltaic glass from the two rear corners along the longitudinal direction towards the middle while moving. Step 7: After completing the adhesive application on the rear edge of the current photovoltaic glass, the current transport mechanism drives the current photovoltaic glass back onto the conveyor belt of the second transport section; then the conveyor belt of the second transport section transports the current photovoltaic glass out of the second transport section, and the unloaded current transport mechanism returns to the first transport section, thus completing the adhesive application process for one piece of current photovoltaic glass. In step 5, while the current photovoltaic glass moves forward to the second conveyor section, the next photovoltaic glass is conveyed into the first conveyor section by the conveyor belt of the first conveyor section as the new current photovoltaic glass to perform the new steps 1 and 2. Another handling mechanism is also waiting below the first conveyor section as the new current handling mechanism, ready to perform the new steps 3 to 7 in sequence. During the process of applying adhesive to the front edge of the current photovoltaic glass, one of the two adhesive application heads starts from the midpoint of the front edge and moves towards its own side to apply adhesive. The other adhesive application head does not apply adhesive at first and follows the other adhesive application head until the adhesive it applies can connect with the starting point of the adhesive applied by the other adhesive application head. Only then does it start to move back towards its own side to apply adhesive. During the process of applying adhesive to the rear edge of the current photovoltaic glass, when the two adhesive application heads meet, one of the adhesive application heads stops applying adhesive and moves back towards its own side. At the same time, the other adhesive application head follows the opposite adhesive application head and continues to move towards the opposite side and continues to apply adhesive until the adhesive applied aligns with the end point of the adhesive applied by the opposite adhesive application head. At this point, both adhesive application heads stop moving, and the other adhesive application head stops applying adhesive.

2. The method for applying adhesive to the edges of photovoltaic glass according to claim 1, characterized in that: The positioning mechanism has a front positioning stop located near the junction of the first conveying segment and the second conveying segment, and the two glue application heads are located above the front positioning stop and biased towards one side of the first conveying segment. In step 3, the current transport mechanism lifts the current photovoltaic glass in the first conveyor section to disengage the current photovoltaic glass from the conveyor belt of the first conveyor section and to place the front edge of the current photovoltaic glass directly below the two glue application heads. In step 7, the transport mechanism first translates and then descends in the second conveyor section to drive the current photovoltaic glass back onto the conveyor belt of the second conveyor section. After the rear edge of the current photovoltaic glass is translated to completely pass the front positioning stop, another transport mechanism waiting below the first conveyor belt fixes and lifts the next photovoltaic glass that has been transported into the first conveyor section and positioned in the new step 3.

3. The method for applying adhesive to the edges of photovoltaic glass according to claim 1, characterized in that: The positioning mechanism has a front positioning stop located near the junction of the first conveying segment and the second conveying segment, and the two glue application heads are located above the front positioning stop and biased towards the second conveying segment. In step 3, the current transport mechanism first lifts and then translates in the first conveyor section to drive the current photovoltaic glass so that the current photovoltaic glass is disengaged from the conveyor belt of the first conveyor section and the front edge of the current photovoltaic glass is located directly below the two glue application heads. In step 6, when the rear edge of the current photovoltaic glass is directly below the two adhesive application heads, while adhesive is being applied to the rear edge of the current photovoltaic glass, the other conveying mechanism fixes and lifts the next photovoltaic glass that has been conveyed into the first conveying section and positioned in the new step 3. In step 7, the adhesive is applied to the rear edge of the current photovoltaic glass. The current transport mechanism first translates and then lowers the current photovoltaic glass in the second transport section so that the current photovoltaic glass falls back onto the conveyor belt of the second transport section. While the current transport mechanism is translating the current photovoltaic glass in the second transport section, another transport mechanism translates the next photovoltaic glass in the new step 3 so that the front edge of the next photovoltaic glass is directly below the two adhesive application heads.

4. The method for applying adhesive to the edges of photovoltaic glass according to claim 1, characterized in that: Both of the glue applicator heads have round applicator openings.

5. The method for applying adhesive to the edges of photovoltaic glass according to claim 1, characterized in that: Both of the adhesive applicator heads have flat applicator openings, and the adhesive applicator heads apply adhesive with the long side of the applicator opening perpendicular to the edge of the photovoltaic glass.

6. The method for applying adhesive to the edges of photovoltaic glass according to claim 5, characterized in that: When the adhesive applicator stops moving and the current photovoltaic glass stops moving, the applicator rotates 90° to apply a right angle at the top corner of the current photovoltaic glass.

7. The method for applying adhesive to the edges of photovoltaic glass according to claim 5, characterized in that: The coating head rotates 90° as it moves along with the current photovoltaic glass to apply a rounded corner to the top corner of the current photovoltaic glass.

8. The method for applying adhesive to the edges of photovoltaic glass according to claim 1, characterized in that: The transport mechanism includes a horizontal drive mechanism and a plurality of longitudinally spaced adsorption pallet units driven by the horizontal drive mechanism, wherein the adsorption pallet units of one transport mechanism are spaced apart from the adsorption pallet units of another transport mechanism.

9. The method for applying adhesive to the edges of photovoltaic glass according to claim 8, characterized in that: The horizontal drive mechanism includes spaced-apart long guide rails, slides fixed on the corresponding long guide rails, a motor, multiple sets of pulleys, multiple synchronous belts, and a drive shaft. The motor is fixed on the frame of the adhesive coating equipment. Each set of pulleys is fixed on one side of the corresponding long guide rail. Each synchronous belt is sleeved on the corresponding pulley set. The drive pulleys in all the pulley sets are connected to the motor through the drive shaft. Each slide is fixedly connected to the corresponding synchronous belt. The adsorption tray unit is fixed on the slide.

10. The method for applying adhesive to the edges of photovoltaic glass according to claim 9, characterized in that: The adsorption tray unit includes vertical guide rails spaced apart on the slide surface, a vertical slider on the vertical guide rails, a horizontal adsorption tray extending in the conveying direction fixed on the vertical slider, a horizontal guide rail on the slide surface, a horizontal sliding foot fixed on the horizontal guide rails, a lifting adjustment block fixed on the horizontal sliding foot, and a power assembly fixed on the slide for driving the lifting adjustment block. The lifting adjustment block has a rail surface, which is divided into an upper horizontal rail surface, a lower horizontal rail surface, and a slope connecting the upper horizontal rail surface and the lower horizontal rail surface. The bottom of the adsorption tray is equipped with rollers supported by the rail surface.

11. The method for applying adhesive to the edges of photovoltaic glass according to claim 6 or 7, characterized in that: The glue applicator drive module is equipped with a rotary drive mechanism that drives the glue applicator to rotate.

12. The method for applying adhesive to the edges of photovoltaic glass according to claim 4, 6, or 7, characterized in that: The glue application head drive module is equipped with a lifting drive mechanism for raising and lowering the glue application head, which is used to adjust the appropriate glue application height.

Images