Automatic felt bonding and material changing device and photovoltaic frame pultrusion production line

Abstract

The utility model discloses a kind of felt automatic bonding material changing device and photovoltaic frame pultrusion production line, felt automatic bonding material changing device includes: first felt roll and second felt roll, first felt is wound on the first felt roll, second felt is wound on the second felt roll;Guiding frame is formed with the gap for felt threading;Bonding assembly is configured to bond first felt and second felt threading gap;In the direction of felt movement, tensioning roller assembly is arranged downstream of gap, when one of first felt and second felt threads tensioning roller assembly, the other waits at gap, tensioning roller assembly is configured to clamp felt threading tensioning roller assembly when bonding assembly bonds first felt and second felt. The present scheme can realize felt automatic bonding material changing.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to an automatic felt bonding and material changing device and a photovoltaic frame pultrusion production line. Background Technology

[0002] Composite photovoltaic frames are mainly composed of fiberglass yarn, felt, polymer resin, and coatings. They are an important component of photovoltaic modules, primarily used for installing, fixing, and sealing photovoltaic module cells. The main production method for composite photovoltaic frames is pultrusion. Raw materials such as fiberglass yarn and felt are gradually combed through yarn racks, dehumidifiers, felt racks, and preforming devices to the pultrusion die inlet. There, they are mixed with polymer resin (such as polyurethane) pumped by a glue injection machine. Under certain pressure and temperature conditions, the mixture is cured and molded. Powered by a traction machine, the molded frame product is continuously pulled out and then cut to a fixed length by a cutting machine based on measured length signals. The cut products then undergo inspection devices for appearance and straightness checks.

[0003] In the pultrusion production line, felt racks are needed to hold the felt. Currently, when the felt is almost used up, it needs to be manually cut and then sewn together with needle and thread or a sewing machine. Needle and thread sewing is very slow, and sewing machine sewing has a high failure rate.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] In response to the problems mentioned in the background art, this utility model proposes an automatic felt bonding and material changing device and a photovoltaic frame pultrusion production line to realize automatic felt bonding and material changing.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: In some embodiments of this application, an automatic felt bonding and material changing device is provided, comprising: A first felt roll and a second felt roll, wherein a first felt roll is wound with a first felt, and a second felt roll is wound with a second felt; A guide frame having a gap for the felt to pass through; An adhesive assembly configured to bond the first felt and the second felt passing through the gap; The tension roller assembly is located downstream of the gap along the direction of movement of the felt. When one of the first felt and the second felt passes through the tension roller assembly, the other waits at the gap. The tension roller assembly is configured to clamp the felt passing through the tension roller assembly when the adhesive assembly bonds the first felt and the second felt.

[0007] In some embodiments of this application, the bonding assembly includes an ultrasonic welding head and a welding seat, wherein the ultrasonic welding head is disposed on one side of the gap and the welding seat is disposed on the other opposite side of the gap; The guide frame is provided with a notch, which communicates with the gap, and the ultrasonic welding head and the welding seat are bonded with felt at the gap through the notch.

[0008] In some embodiments of this application, the guide frame is provided with a felt waiting position, which is located downstream of the notch along the direction of movement of the felt.

[0009] In some embodiments of this application, the tension roller assembly includes a tension shaft assembly and a clamping wheel assembly; the tension shaft assembly includes a tension shaft, the clamping wheel assembly includes a clamping wheel, and the felt passes through the gap between the tension shaft and the clamping wheel.

[0010] In some embodiments of this application, the tension shaft assembly further includes a magnetic powder brake connected to the tension shaft.

[0011] In some embodiments of this application, the tension shaft assembly further includes an encoder.

[0012] In some embodiments of this application, a buffer swing arm mechanism is also included. Along the direction of movement of the felt, the buffer swing arm mechanism is disposed downstream of the tension roller assembly. One of the first felt and the second felt passes around the buffer swing arm mechanism. The buffer swing arm mechanism is configured to release the tension on the felt when one of the first felt and the second felt is about to be used up. In some embodiments of this application, the buffer swing arm mechanism includes a plurality of first guide rollers and a swing arm. A second guide roller is disposed on the swing arm. The felt passes around the first guide roller and the second guide roller. The swing arm swings to release the tension on the felt.

[0013] In some embodiments of this application, a first shearing portion is provided between the first felt roll and the guide frame, and a second shearing portion is provided between the second felt roll and the guide frame.

[0014] In some embodiments of this application, a photovoltaic frame pultrusion production line is also provided, including the felt automatic bonding and material changing device described above.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are: In the automatic felt bonding and changing device disclosed in this application, one of the first felt roll and the second felt roll is used as the in-use roll, and the other is used as a spare roll, and the two are used alternately. When the first felt is about to run out, the second felt can be ready in advance at the gap of the guide frame, without the need for frequent manual monitoring of the felt remaining.

[0016] In this application, the tension roller assembly is positioned downstream of the guide frame gap along the direction of felt movement and clamps the felt in use during bonding. This allows for the continuous application of stable tension to the felt in use during the material change bonding process. When the bonding assembly connects the first felt and the second felt, the tension roller assembly fixes the position and tension of the felt in use through clamping action, preventing relaxation caused by sudden tension changes at the moment the two felts are connected. At the same time, when the spare felt is waiting in the gap, the felt in use is always in a taut state, ensuring the combing accuracy of the fiberglass yarn and felt in the preforming process, as well as the fit between the raw material and the mold shape during hot molding.

[0017] The automatic bonding and material changing structure of this application does not require complex manual operation. Operators only need to replenish the first and second felt rolls periodically, without having to participate in complex processes such as cutting and sewing, thus reducing reliance on operator skills and reducing the intensity of manual labor.

[0018] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a photovoltaic frame pultrusion production line according to some embodiments; Figure 2 This is a structural diagram of a felt rack and dehumidification integrated device according to some embodiments; Figure 3 This is a structural diagram of a felt frame according to some embodiments; Figure 4 This is a partial structural diagram of a felt frame according to some embodiments; Figure 5 This is a structural diagram of a tension shaft assembly according to some embodiments.

[0021] Figure label: 1. Fiberglass yarn frame; 2. Fiberglass yarn; 3. Felt frame and dehumidification integrated device; 31. Dehumidifier; 32. Felt frame; 4. Fiberglass yarn tension adjustment device; 5. Pultrusion die; 6. Glue injection machine; 7. Framed products; 8. Traction machine; 9. Cutting machine; 10. Testing device; 100. Automatic felt bonding and material changing device; 110. First felt roll; 111. First felt; 112. Third guide roller; 120. Second felt roll; 121. Second felt; 122. Fourth guide roller; 130. Guide frame; 131. Gap; 132. Felt waiting position; 133. Notch; 134. Partition; 140. Bonding assembly; 141. Ultrasonic welding head; 142. Welding seat; 150. Tension roller assembly; 151. Tension shaft; 152. Magnetic powder brake; 153. Bearing; 154. Encoder; 155. Coupling; 156. Clamping wheel; 157. Cylinder; 160. Buffer swing arm mechanism; 161. First guide roller; 162. Second guide roller; 163. Swing arm; 171. First shearing part; 172. Second shearing part. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0028] In some embodiments of this application, a photovoltaic frame pultrusion production line is provided, as shown in the reference... Figure 1 The production line includes a fiberglass yarn frame 1, a pultrusion mold 5, a traction machine 8, a cutting machine 9, and a testing device 10 arranged in sequence. This production line involves the production of semi-finished frame products, but does not involve subsequent processes such as beveling, drilling, or spraying.

[0029] Specifically, the production line includes a fiberglass yarn rack 1. The function of the fiberglass yarn rack 1 is to hold bundles of fiberglass yarn, which are produced by an inward-retracting yarn output.

[0030] The production line also includes a felt rack 32, which is used to hold felt.

[0031] The production line also includes a dehumidifier 31, which is used to remove moisture from the yarn.

[0032] The production line also includes a fiberglass yarn tension adjustment device 4, which is used to adjust the tension of the fiberglass yarn 2.

[0033] The production line also includes a pultrusion die 5. The pultrusion die 5 consists of two parts: a preforming die and a hot mold. The preforming die further straightens the fiberglass yarn 2 and felt that are about to enter the die, while the hot mold constrains all the raw materials to the shape of the frame product 7 and cures them under certain temperature and injection pressure.

[0034] The production line also includes a glue injection machine 6, which pumps polymer resin raw materials to the glue injection port of the pultrusion die 5 via a glue injection pump.

[0035] The production line also includes a traction machine 8, which provides the power to pull the cured frame out of the mold.

[0036] The production line also includes a cutting machine 9, which performs fixed-length cutting of the frame product 7 according to the measured length.

[0037] The production line also includes a testing device 10, which performs quality inspections on indicators such as the straightness and appearance of the frame.

[0038] In some embodiments of this application, reference is made to Figure 2 The felt frame 32 is integrated with the dehumidifier 31 to form a felt frame and dehumidification integrated device 3. The felt frame 32 is provided at the top and bottom of the dehumidifier 31. Its main function is to transfer the yarn, remove moisture from the yarn, support the felt roll, and provide tension to the felt.

[0039] The production line of this application, by setting up a felt rack and dehumidification integrated device 3, directly reduces the space occupied by a single piece of equipment, eliminating the need to plan separate installation areas for the dehumidifier 31 and the felt rack 32, thus reducing the total area occupied by both within the constant temperature and humidity chamber. On the one hand, under the same site conditions, it can improve the layout flexibility of other equipment within the constant temperature and humidity chamber, and even reduce the overall construction scale of the constant temperature and humidity chamber, thereby reducing factory infrastructure and energy consumption costs; on the other hand, the integrated design reduces redundant intervals between equipment, making the overall layout of the production line more compact, facilitating inspection and maintenance by operators, and indirectly improving production efficiency.

[0040] Furthermore, this application fundamentally shortens the conveying distance of the dehumidified fiberglass yarn 2 from its dehumidification stage to its entry into the pultrusion mold 5 by integrating the felt frame 32 with the dehumidifier 31 and optimizing the production line layout. The dehumidified fiberglass yarn 2 can directly transition from the felt frame 32 within the integrated device to the subsequent preforming process without undergoing long-distance winding, reducing contact time with moisture in the air and effectively preventing secondary moisture absorption by the fiberglass yarn 2. The reduced moisture content of the fiberglass yarn 2 also reduces appearance defects such as bubbles and pinholes caused by moisture vaporization during its mixing and curing with the polymer resin, improving the appearance qualification rate of the composite photovoltaic frame.

[0041] In some embodiments of this application, the fiberglass yarn tension adjustment device 4 is positioned near the inlet of the pultrusion mold 5, allowing for real-time monitoring and adjustment of the tension of the fiberglass yarn 2 about to enter the mold. This avoids tension loss or fluctuations caused by factors such as twisting friction and equipment vibration during long-distance transport. On one hand, stable and precise yarn tension ensures that the fiberglass yarn 2 is evenly distributed during the pre-forming stage, preventing fiber breakage due to excessive local tension or fiber accumulation due to insufficient tension, thus ensuring the cross-sectional dimensional accuracy of the frame product 7 after molding. On the other hand, uniform tension distribution allows the fiberglass yarn 2 to be fully impregnated with the polymer resin and subjected to uniform force within the mold, reducing local structural looseness or stress concentration caused by uneven tension, improving the structural consistency of different batches of frame products 7, and reducing quality risks such as product deformation and cracking caused by tension deviations.

[0042] In existing pultrusion production lines, when the felt is almost used up, it needs to be manually cut and then sewn together with needle and thread or a sewing machine. Needle and thread sewing is very slow, and sewing machine sewing has a high failure rate. Furthermore, because the felt tension is controlled at the felt roll, the roll diameter continuously decreases during use, causing the felt tension to continuously increase, resulting in uncontrollable tension. Moreover, it requires constant monitoring of the felt's condition, especially whether it has been used up.

[0043] To address the aforementioned problems, in some embodiments of this application, the felt frame 32 is structurally improved, providing an automatic felt bonding and changing device 100, which has an automatic felt bonding and changing function. Specifically, refer to... Figure 3 and Figure 4 It includes a first felt roll 110 and a second felt roll 120, with a first felt 111 wound on the first felt roll 110 and a second felt 121 wound on the second felt roll 120.

[0044] The automatic felt bonding and changing device 100 also includes a guide frame 130, which has a gap 131 for the felt to pass through. For example, the gap 131 extends vertically up and down. A partition 134 is provided in the gap 131 to separate the first felt 111 and the second felt 121 in the gap 131 and prevent them from interfering with each other.

[0045] The automatic felt bonding and changing device 100 also includes a bonding component 140, which is configured to bond the first felt 111 and the second felt 121 passing through the gap 131.

[0046] The automatic felt bonding and changing device 100 also includes a tension roller assembly 150, which is located downstream of the gap 131 along the direction of felt movement; for example, the tension roller assembly is located directly below the gap 131. When one of the first felt 111 and the second felt 121 passes through the tension roller assembly 150, the other waits at the gap 131. The tension roller assembly 150 is configured to clamp the felt passing through it when the bonding assembly 140 bonds the first felt 111 and the second felt 121.

[0047] In the automatic felt bonding and material changing device 100 disclosed in this application, one of the first felt roll 110 and the second felt roll 120 is used as the in-use roll and the other is used as a spare roll, and the two are used alternately. When the first felt 111 is about to run out, the second felt 121 can be ready in advance at the gap 131 of the guide frame 130, without the need for frequent manual monitoring of the felt balance.

[0048] In this application, the tension roller assembly 150 is positioned downstream of the gap 131 of the guide frame 130 along the direction of felt movement. During bonding, it clamps the felt in use, continuously applying stable tension to the felt in use during the material change bonding process. When the bonding assembly 140 connects the first felt 111 and the second felt 121, the tension roller assembly 150 fixes the position and tension of the felt in use through clamping action, preventing relaxation caused by sudden tension changes at the moment the two felts connect. At the same time, when the spare felt is waiting at the gap 131, the felt in use is always in a taut state, ensuring the combing accuracy of the fiberglass yarn 2 and the felt in the preforming process, as well as the fit between the raw material and the mold shape during hot molding.

[0049] The automatic bonding and material changing structure of this application does not require complex manual operation. Operators only need to replenish the first felt roll 110 and the second felt roll 120 periodically, without having to participate in complex processes such as cutting and sewing, thus reducing reliance on operator skills and reducing the intensity of manual labor.

[0050] In some embodiments of this application, the bonding assembly 140 includes an ultrasonic welding head 141 and a welding seat 142. The ultrasonic welding head 141 is disposed on one side of the gap 131, and the welding seat 142 is disposed on the opposite side of the gap 131. For example, the ultrasonic welding head 141 is disposed on the left side of the gap 131, and the welding seat 142 is disposed on the right side of the gap 131.

[0051] The guide frame 130 is provided with a notch 133, which communicates with the gap 131. The ultrasonic welding head 141 and the welding seat 142 are bonded with felt at the gap 131 through the notch 133.

[0052] Specifically, the ultrasonic welding head 141 serves as the active actuator, and the welding seat 142 serves as the passive support. The two are arranged opposite each other on the left and right sides of the gap 131 in the guide frame 130. The guide frame 130 has a rectangular notch 133 at the position corresponding to the ultrasonic welding head 141 and the welding seat 142. One end of the notch 133 communicates with the felt through the gap 131 of the guide frame 130, providing operating space for the movement of the ultrasonic welding head 141 and the support and positioning of the welding seat 142.

[0053] If adhesives (such as hot melt adhesives or pressure-sensitive adhesives) are used for bonding, excess adhesive can easily adhere to the guide frame 130, tension rollers, or enter the pultrusion mold 5 with the felt. On the one hand, the adhesive mixes with the polymer resin in the mold, which may lead to uneven resin curing and the formation of impurities inside the frame; on the other hand, adhesive residue requires regular cleaning of the equipment, increasing maintenance workload and costs.

[0054] This ultrasonic welding method eliminates the need for any adhesives, thus preventing adhesive contamination at the source. The pultrusion die 5 is free of foreign impurities, resulting in improved resin curing uniformity and reduced appearance defects in the finished frame. Furthermore, the guide frame 130, tension rollers, and pultrusion die 5 do not require cleaning of adhesive residue.

[0055] Photovoltaic frames require felt of varying thicknesses and densities depending on power requirements. Conventional bonding components 140 are ill-suited to the bonding pressure and temperature requirements of various felt specifications. In this solution, the pressure and vibration time of the ultrasonic welding head 141 can be adjusted in real time via a control system, and the support height of the welding seat 142 is also adjustable. This adjustability allows the production line to be compatible with the production of various felt specifications without replacing the bonding component 140.

[0056] In some embodiments of this application, the guide frame 130 is provided with a felt waiting position 132, which is located downstream of the notch 133 along the direction of movement of the felt. For example, the felt waiting position 132 is located directly below the notch 133, and the tension roller assembly 150 is located below the felt waiting position 132.

[0057] When the first felt 111 (felt in use) is in normal conveying state, the operator pulls the free end of the second felt 121 (spare felt) to the guide frame 130 area in advance, first passes the free end of the spare felt through the gap 131 of the guide frame 130, and then puts it into the downstream felt waiting position 132 along the outlet end of the gap 131.

[0058] When the first felt 111 is insufficient, the production line triggers a material change signal. The tension roller assembly 150 clamps the first felt 111, ensuring that the felts on both sides of the tension shaft 151 do not interfere with each other. The operator does not need to pull the spare felt again. Instead, the operator only needs to issue a bonding command to the bonding assembly 140 through the control system. The ultrasonic welding head 141 and the welding seat 142 move closer to each other, bonding the first felt 111 to the second felt 121.

[0059] In some embodiments of this application, the tension roller assembly 150 includes a tension shaft assembly and a clamping roller assembly. Figure 5 This is a structural diagram of a tension shaft assembly. The tension shaft assembly includes a tension shaft 151, and the clamping wheel assembly includes a clamping wheel 156. The tension shaft 151 and the clamping wheel 156 are arranged parallel to each other, and felt (in-use felt) passes through the gap between the tension shaft 151 and the clamping wheel 156.

[0060] The clamping wheel 156 is connected to the cylinder 157, and the cylinder 157 drives the clamping wheel 156 to move toward or away from the tension shaft 151.

[0061] After the felt passes through the gap between the tension shaft 151 and the clamping wheel 156, the conveying direction changes from vertical conveying to horizontal conveying.

[0062] In some embodiments of this application, reference is made to Figure 5 The tension shaft assembly further includes a magnetic powder brake 152, which is connected to the tension shaft 151. A bearing 153 is provided between the magnetic powder brake 152 and the tension shaft 151. The tension of the tension shaft 151 is kept constant by controlling the tension of the magnetic powder brake 152, thereby achieving constant tension control of the felt.

[0063] In some embodiments of this application, the tension shaft assembly further includes an encoder 154. A coupling 155 is provided between the encoder 154 and the magnetic powder brake 152.

[0064] In some embodiments of this application, the felt frame 32 further includes a buffer swing arm mechanism 160, located downstream of the tension roller assembly 150 along the direction of felt movement. One of the first felt 111 and the second felt 121 passes around the buffer swing arm mechanism 160, which is configured to release the tension on the felt when one of the first felt 111 or the second felt 121 is nearly exhausted. Temporary buffering and tension buffering of the felt are achieved through the dynamic oscillation of the mechanical swing arm.

[0065] Specifically, the buffer rocker arm mechanism 160 includes multiple first guide rollers 161 and a rocker arm 163. A second guide roller 162 is provided on the rocker arm 163, and the felt is wound around the first guide rollers 161 and the second guide rollers 162. The felt is wound around the first guide rollers 161 and the second guide rollers 162 in sequence, that is, the felt is wound around the first guide roller 161, then around the second guide roller 162, then around the first guide roller 161, and so on.

[0066] The swing arm 163 swings to release the tension on the felt. The first guide roller 161 is located above the swing arm 163, and one end of the swing arm 163 is rotatably connected to the mounting bracket of the felt frame 32. The swing arm 163 moves toward the first guide roller 161, and the distance between the first guide roller 161 and the second guide roller 162 decreases, thereby releasing the tension on the felt.

[0067] In some embodiments of this application, a first shearing section 171 is provided between the first felt roll 110 and the guide frame 130, and a second shearing section 172 is provided between the second felt roll 120 and the guide frame 130. For example, both the first shearing section 171 and the second shearing section 172 are pneumatic shears.

[0068] When the first felt 111 is almost used up, it is cut by the first shearing part 171. When the second felt 121 is almost used up, it is cut by the second shearing part 172.

[0069] In some embodiments of this application, a third guide roller 112 is provided between the first felt roll 110 and the guide frame 130, so that the first felt 111 exiting the first felt roll 110 is reliably conveyed into the gap 131 of the guide frame 130. A fourth guide roller 122 is provided between the second felt roll 120 and the guide frame 130, so that the second felt 121 exiting the second felt roll 120 is reliably conveyed into the gap 131 of the guide frame 130.

[0070] In some embodiments of this application, the automatic felt bonding and material changing process is as follows: When the first felt roll 110 is in use, the first felt 111 passes through the third guide roller 112, the guide frame 130, the tension roller assembly 150 and the buffer swing arm mechanism 160; The power for the felt comes from the traction machine 8 at the front, and the felt is pulled by the traction machine 8 through the pultrusion die 5. The tension roller assembly 150 clamps the first felt 111 on the tension shaft 151, and the tension of the tension shaft 151 is kept constant by adjusting the tension of the magnetic powder brake 152, thereby achieving constant tension control of the first felt 111; After the second felt roll 120 is prepared, the second felt 121 needs to be passed through the fourth guide roller 122 and the guide frame 130, and then the end of the second felt 121 is placed in the felt waiting position 132 below the guide frame 130. When the first felt 111 is almost used up, the swing arm 163 is lifted, triggering the detection switch of the swing arm 163. At this time, the magnetic powder brake 152 will give the tension shaft 151 a large tension, which is equivalent to clamping it directly at this place, so that the felt on both sides of the tension shaft 151 do not affect each other. The first shearing part 171 cuts the first felt 111, then the magnetic powder brake 152 restores normal tension, and the encoder 154 starts counting. When the count reaches a certain value, the cut end of the first felt 111 reaches the bonding position, that is, the notch 133. Tension shaft 151 increases tension again, ultrasonic welding head 141 and welding seat 142 move, sticking the first felt 111 and the second felt 121 together. After bonding is completed, tension shaft 151 returns to normal operating tension, and the machine alarms to remind the operator to replace the first felt roll 110 with a new material roll, thus completing the entire automatic bonding action; Similarly, the automatic replacement of the second felt 121 can also be completed when it is used up.

[0071] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0072] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An automatic felt bonding and material changing device, characterized in that, Including: A first felt roll and a second felt roll, wherein a first felt roll is wound with a first felt, and a second felt roll is wound with a second felt; A guide frame having a gap for the felt to pass through; An adhesive assembly configured to bond the first felt and the second felt passing through the gap; The tension roller assembly is located downstream of the gap along the direction of movement of the felt. When one of the first felt and the second felt passes through the tension roller assembly, the other waits at the gap. The tension roller assembly is configured to clamp the felt passing through the tension roller assembly when the adhesive assembly bonds the first felt and the second felt.

2. The automatic felt bonding and material changing device according to claim 1, characterized in that, The bonding assembly includes an ultrasonic welding head and a welding seat, wherein the ultrasonic welding head is disposed on one side of the gap and the welding seat is disposed on the opposite side of the gap. The guide frame is provided with a notch, which communicates with the gap, and the ultrasonic welding head and the welding seat are bonded with felt at the gap through the notch.

3. The automatic felt bonding and material changing device according to claim 2, characterized in that, The guide frame is provided with a felt waiting position, which is located downstream of the notch along the direction of the felt's movement.

4. The automatic felt bonding and material changing device according to claim 1, characterized in that, The tension roller assembly includes a tension shaft assembly and a clamping wheel assembly; the tension shaft assembly includes a tension shaft, the clamping wheel assembly includes a clamping wheel, and the felt passes through the gap between the tension shaft and the clamping wheel.

5. The automatic felt bonding and material changing device according to claim 4, characterized in that, The tension shaft assembly also includes a magnetic powder brake, which is connected to the tension shaft.

6. The automatic felt bonding and material changing device according to claim 4, characterized in that, The tension shaft assembly also includes an encoder.

7. The automatic felt bonding and material changing device according to any one of claims 1 to 6, characterized in that, It also includes a buffer swing arm mechanism located downstream of the tension roller assembly along the direction of movement of the felt. One of the first felt and the second felt passes around the buffer swing arm mechanism, which is configured to release the tension on the felt when one of the first felt and the second felt is almost used up.

8. The automatic felt bonding and material changing device according to claim 7, characterized in that, The buffer swing arm mechanism includes multiple first guide rollers and a swing arm. A second guide roller is provided on the swing arm. The felt is wrapped around the first guide roller and the second guide roller. The swing arm swings to release the tension on the felt.

9. The automatic felt bonding and material changing device according to any one of claims 1 to 6, characterized in that, A first shearing section is provided between the first felt roll and the guide frame, and a second shearing section is provided between the second felt roll and the guide frame.

10. A photovoltaic frame pultrusion production line, characterized in that, It includes an automatic felt bonding and material changing device as described in any one of claims 1 to 9.

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