Pneumatic cutting and feeding mechanism for photovoltaic module EVA (Ethylene Vinyl Acetate) gasket

Abstract

The utility model discloses a pneumatic cutting and feeding mechanism for a photovoltaic module EVA (Ethylene Vinyl Acetate) gasket, which comprises a material strip roll frame, a punching assembly, a cutting assembly and a feeding and transferring assembly which are sequentially positioned and arranged along a material conveying direction, and a material clamping assembly which is controlled to move back and forth is arranged beside an EVA material strip stroke, an EVA material belt is guided and input into the punching assembly and is fed by the clamping assembly between the punching assembly and the cutting assembly in a stepping mode, the punching assembly is provided with a drill bit driven by a punching air cylinder to ascend and descend, and the cutting assembly retreats to give way when the EVA material belt is in an advancing state and feeds, cuts and segments the EVA material belt when the EVA material belt is in a positioning state. And the feeding and transferring assembly is provided with a feeding unit for continuously conveying to the next process and a pneumatic suction cup for sucking the sheared EVA gaskets and transferring the sheared EVA gaskets into the feeding channel. The blanking and feeding mechanism is applied to a photovoltaic module production line, EVA material belt shearing, adsorption material taking and continuous feeding are completed by optimizing the shearing assembly, the difficulty of picking up EVA gaskets in the later-stage manufacturing process can be reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic manufacturing equipment technology, and in particular to a pneumatic cutting and feeding mechanism for EVA pads of photovoltaic modules. Background Technology

[0002] In the field of photovoltaic (PV) equipment, busbars are conductive strips attached to PV cells, typically made of silver paste or copper. A PV panel contains many cells, and the current generated by these cells needs to be collected to form the output of the entire PV module. Busbars help improve the overall efficiency of the PV module by consolidating this current into one or a few main current paths.

[0003] In the assembly and manufacturing process of photovoltaic modules, especially before the busbars are installed, custom-shaped EVA gaskets need to be applied to the glass plate. Typically, these EVA gaskets need to be mass-produced in large quantities. Due to their small size, diverse shapes, and extremely thin thickness, they are prone to scattering in the transport box during batch prefabrication, storage, transportation, and application, causing inconvenience for manual or robotic material handling. Furthermore, similar production facilities use a punching method to cut segments, requiring EVA strip tension to ensure smooth cutting, resulting in unreliable yield. Therefore, a better process choice is to apply the gaskets as they are made, with continuous material supply at equal intervals to improve production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a pneumatic cutting and feeding mechanism for EVA pads in photovoltaic modules, which solves the problem of smooth cuts and efficient feeding of EVA pads.

[0005] To achieve the above objectives, this utility model provides a pneumatic cutting and feeding mechanism for EVA pads in photovoltaic modules, including a strip reel, a punching assembly, a cutting assembly, and a loading and transfer assembly arranged sequentially along the material feeding direction. A controlled reciprocating clamping assembly is provided on the side of the EVA strip's travel path. The EVA strip is guided into the punching assembly and fed stepwise between the punching assembly and the cutting assembly by the clamping assembly. The punching assembly is equipped with a drill bit driven by a punching cylinder for lifting and lowering. The cutting assembly retracts to make way when the EVA strip is traveling and feeds and cuts the EVA strip into segments when it is positioned. The loading and transfer assembly is equipped with a loading unit that continuously transmits the material to subsequent processes and a pneumatic suction cup that picks up the cut EVA pads and transfers them into the loading channel.

[0006] Furthermore, the strip reel is mounted on a high position above the other components via a stand, and the EVA strip is drawn out from the bottom side of the strip reel and fed into the punching assembly in a flat manner.

[0007] Furthermore, the punching assembly is provided with a gantry frame that spans the EVA strip travel, the punching cylinder is fixed on the top of the gantry frame, and the cylinder output end passes through the gantry frame and is connected to the drill bit therein; the punching assembly is provided with a punching pressure plate acting on the EVA strip and corresponding alignment positioning blocks on both sides of the corresponding feeding direction based on the gantry frame.

[0008] Furthermore, the clamping assembly is equipped with a linear displacement carrier plate and a pair of pneumatic chucks assembled with a preset spacing on its surface. The pneumatic chucks remain clamped and stationary when the cutting assembly is in operation, and continuously perform release, retraction, clamping, and feeding actions when the cutting assembly is in a retracted and waiting state, so as to move the EVA strip over the cutting assembly by a distance corresponding to the length of the EVA pad.

[0009] Furthermore, the cutting assembly consists of an advance and retreat rail and a pneumatically driven shear. When the EVA strip is in place and its two ends are clamped, the pneumatically driven shear moves the EVA strip out and continuously performs the actions of closing cut and opening retraction.

[0010] Furthermore, the cutting assembly is provided with a pre-pressure clamping plate group on the feeding side of the pneumatic scissors, and a tray providing pneumatic suction cup material support on the discharging side of the pneumatic scissors.

[0011] Furthermore, the feeding unit is equipped with a linear transmission pulley and its drive motor, and the pneumatic suction cup is mounted on a carrier plate that is driven to linearly displace in both horizontal and vertical directions.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This pneumatic cutting and feeding mechanism is applied to the photovoltaic module production line. By optimizing the cutting components, the edge flatness of the EVA strip is improved, so that the EVA strip can smoothly realize drilling, cutting, adsorption and continuous feeding as it travels. This can reduce the difficulty of picking up EVA pads in the later process and improve production efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the pneumatic cutting and feeding mechanism of this utility model.

[0014] Figure 2 yes Figure 1 The diagram shows a top view of the pneumatic shearing and feeding mechanism. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master, and thus to make a clearer definition of the protection scope of this utility model. It should be understood that the specific embodiments described herein are merely used to explain this utility model and are not intended to limit this utility model.

[0016] This utility model proposes a pneumatic cutting and feeding mechanism for EVA pads in photovoltaic modules, such as... Figure 1 and Figure 2 The diagram shows a strip reel 1, a punching assembly 3, a cutting assembly 4, and a loading and transfer assembly, all positioned sequentially along the material feeding direction. A controlled reciprocating clamping assembly 2 is located beside the EVA strip 8 during its travel. The EVA strip 8 is guided into the punching assembly 3 and fed in a step-by-step manner by the clamping assembly 2 between the punching assembly 3 and the cutting assembly 4. The punching assembly 3 is equipped with a drill bit (not shown) driven by a punching cylinder for raising and lowering. This drill bit is used to form square holes 811 or other parallel elongated holes at intervals on the EVA strip, meeting the requirements of the busbar mounting process. The actual hole shape can be slightly modified depending on the product; simply replacing the drill bit with the appropriate shape will suffice. To obtain EVA pads 81 with smooth edges, the cutting assembly 3 simulates scissor operation, retracting to make way while the EVA strip is traveling, and feeding and cutting the EVA strip into segments while it is positioned. Since the cutting action is from one side to the other along the width of the EVA strip, the tension requirement for the EVA strip is relatively low, and there is no need to worry about warping or deformation during the cutting process to obtain irregularly shaped EVA pads. The loading and transfer assembly is equipped with a loading unit 6 that continuously transfers the material to the subsequent process and a pneumatic suction cup 52 that picks up the cut EVA pads and transfers them into the loading channel (it does not participate in fixing the EVA strip during the cutting process).

[0017] From the illustration, and considering further technical refinement and optimization, the strip reel 1, serving as the starting point of the EVA strip's journey, is positioned high above the other components via the upright frame 7. The EVA strip 8 is extracted from the bottom side of the reel and fed flat into the punching assembly. By reducing the excessive tension requirement on the EVA strip, this mechanism eliminates the need for several distributed guide rollers, achieving structural simplification and cost reduction.

[0018] The punching assembly 3, located adjacent to the strip reel, is equipped with a gantry frame that spans the EVA strip's travel distance. The aforementioned punching cylinder is fixed to the top of the gantry frame, and its output end passes through the gantry frame and connects to the drill bit therein. When the punching cylinder is connected to the air source controller and periodically pressurized and depressurized, the drill bit is driven downward to pierce the EVA strip and complete the drilling, and is then driven upward to allow the EVA strip to travel further. To further ensure the forming quality of the drilling and prevent the EVA strip's travel distance from becoming skewed and affecting the cutting shape, the punching assembly, based on the gantry frame, is also equipped with a punching pressure plate acting on the EVA strip and corresponding alignment and positioning blocks on both sides of the corresponding feeding direction. The former punching pressure plate is periodically controlled to apply downward pressure and lift the plate to release the EVA strip according to the frequency of EVA strip cutting and feeding, while the latter alignment and positioning blocks are statically set in pairs, leaving only a material passage that cannot be deviated.

[0019] As the power source for transporting EVA strip materials by boat, the clamping assembly 2 is equipped with a linear displacement carrier plate and a pair of pneumatic clamps 21a and 21b assembled with a preset spacing on their surfaces. In actual operation, the pair of pneumatic clamps remain clamped and stationary when the cutting assembly is in operation, synchronously clamping and fixing the EVA strip; while when the cutting assembly is in a retracted and waiting state, it continuously performs the actions of releasing, retracting, clamping, and feeding, so that the EVA strip jumps over the cutting assembly by a distance corresponding to a preset length of EVA pad.

[0020] As a key optimization project of our organization, the cutting assembly 4 consists of an infeed / retractable linear guide and a pneumatically driven shear 41. When the EVA strip is in place and clamped at both ends, the pneumatically driven shear 41 feeds the EVA strip out and continuously performs closing cuts and opening retraction actions. The speed of the infeed / retractable linear guide can be set as needed, and through the setting of the air source controller, the cutting action can be completed within 1 second. As an optional depth optimization, the cutting assembly has a pre-compression clamping plate assembly on the feed side of the pneumatically driven shear to compensate for the deformation caused by the flexibility and stress extension of the wider EVA pad, maintaining the tension strength of the cut edge. Furthermore, a support plate is provided on the discharge side of the pneumatically driven shear to provide pneumatic suction cup support for material retrieval, and it is driven by the infeed / retractable linear guide and moves synchronously with the pneumatically driven shear.

[0021] To facilitate seamless integration with subsequent processes, the loading unit 6 is equipped with a linear transmission pulley 62 and its drive motor 61. During the entire operation of the mechanism, the linear transmission pulley operates continuously without interfering with the operation of other components. The pneumatic suction cup 52 is mounted on the carrier plate of the transport unit 5, a composite machine capable of linear displacement in both horizontal and vertical directions, which includes a servo motor 51 providing horizontal power. The pneumatic suction cup is driven to periodically reciprocate between the cutting and picking station and the linear transmission pulley, transferring the EVA pads.

[0022] In summary, the above introduction and detailed description of the pneumatic cutting and feeding mechanism for EVA pads in photovoltaic modules demonstrate that this solution possesses substantial features and advancements: When applied to a photovoltaic module production line, this pneumatic cutting and feeding mechanism optimizes the cutting components to improve the edge smoothness of the EVA strip during cutting, enabling the EVA strip to smoothly achieve drilling, cutting, adsorption, and continuous feeding as it travels. This reduces the difficulty of picking up EVA pads in subsequent processes and improves production efficiency.

[0023] In addition to the above embodiments, the present invention may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A pneumatic cutting feed mechanism for EVA gaskets for photovoltaic modules, characterized in that: The EVA material belt is guided into the punching assembly and step-fed by the clamping assembly between the punching assembly and the cutting assembly, the punching assembly is provided with a drill bit driven by a punching cylinder, the cutting assembly is retracted to give way in the EVA material belt running state and is fed and cut into segments in the EVA material belt positioning state, and the feeding and moving assembly is provided with a feeding unit continuously transmitted to the next process and a pneumatic suction cup sucking the EVA gasket after cutting and moving into the feeding channel.

2. The air-knife coining apparatus of claim 1, wherein: The material belt reel is arranged at a high position of the remaining components by a stand, and the EVA material belt is drawn out from the bottom side of the material belt reel and input into the punching assembly in a flat manner.

3. The air-knife coining apparatus of claim 1, wherein: The punching assembly is provided with a portal frame spanning the EVA material belt, the punching cylinder is fixedly arranged on the top of the portal frame, and the output end of the cylinder penetrates through the portal frame and is connected with the drill bit therein; the punching assembly is provided with a punching pressure plate acting on the EVA material belt and a corresponding normalizing positioning block opposite on both sides of the material belt running direction based on the portal frame.

4. The air-knife coining apparatus of claim 1, wherein: The clamping assembly is provided with a linear displacement carrier plate and a pair of pneumatic clamps assembled on the surface of the carrier plate with a predetermined interval, the pneumatic clamps remain clamped and stationary in the running state of the cutting assembly, and continuously perform the actions of releasing, backtracking, clamping and feeding in the retracted standby state of the cutting assembly, so that the EVA material belt jumps over the cutting assembly by a distance corresponding to the length of the EVA gasket.

5. The pneumatic cutting and feeding mechanism for photovoltaic module EVA pads according to claim 1, characterized in that: The cutting assembly is composed of an advancing and retracting straight rail and a gas-driven shear, in the state that the EVA material belt is positioned and the two ends are clamped, the gas-driven shear is fed out in accordance with the EVA material belt and continuously performs the actions of closing and cutting and opening and backtracking.

6. The air-knife coining apparatus of claim 5, wherein: The cutting assembly is provided with a pre-pressing clamp plate group on the feeding side of the gas-driven shear, and a supporting plate for the pneumatic suction cup on the discharging side of the gas-driven shear.

7. The air-knife coining apparatus of claim 1, wherein: The feeding unit is provided with a linear transmission pulley and a driving motor, and the pneumatic suction cup is attached to a carrier plate driven by linear displacement in horizontal and vertical directions.

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