A prepreg diagonal cutting continuous production device

Abstract

The present invention discloses an automatic bevel cutting and connecting mechanism for prepreg, comprising a film unwinding and peeling system, a traction and cutting system, a positioning and conveying system, an automatic connecting system and a film winding and coating system which are sequentially arranged along the direction of the production line; the positioning and conveying system comprises a driving module, a support beam, a material grabbing frame, a material pressing plate and a plurality of adsorption modules; the material grabbing frame is movably arranged on the support beam and driven by the driving module; the material pressing plate has a vertical movement component and is arranged on the material grabbing frame for pressing the prepreg; a plurality of adsorption modules are arranged on the working surface of the material pressing plate for pressing the prepreg; the automatic connecting system comprises a thermal bonding station arranged at the outlet of the positioning and conveying system; the material pressing plate moves with the material grabbing frame to drive the adsorbed prepreg to move to a position where the head end overlaps with the tail end of the previously cut prepreg on the thermal bonding station, so that the product deformation is small and the winding is neat during the production process, thereby avoiding excessive deformation of the prepreg and ensuring the winding quality requirements of the prepreg.

Description

Technical Field

[0001] The invention relates to the technical field of prepreg process equipment, and in particular to a prepreg bevel cutting continuous production device. Background Art

[0002] Prepreg is the intermediate material of advanced composite materials. It is the basic unit of composite material structure. The mechanical and chemical properties of composite materials depend to a large extent on the intrinsic quality of prepreg. The molding processability of composite materials is also closely related to the state of prepreg.

[0003] In the prior art, in a series of processes after the prepreg is beveled, there is a risk of causing deformation of the tape during the fixing of the tape, conveying it to the next process, thermal bonding, thermal bonding, and subsequent winding process, which ultimately affects the winding quality of the prepreg. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an automatic bevel cutting and connecting mechanism for prepreg, which has small product deformation and neat winding, avoids excessive deformation of the prepreg, ensures the winding quality requirements of the prepreg, improves efficiency and reduces production costs.

[0005] The scheme for achieving the technical purpose of the present invention is a prepreg bevel continuous production device, including an unwinding and film peeling system, a traction and cutting system, a positioning and conveying system, an automatic connection system and a winding and film coating system which are sequentially arranged along the production line direction;

[0006] The positioning and conveying system comprises a driving module, a support beam, a material gripping frame, a material pressing plate and a plurality of adsorption modules; the material gripping frame is movably arranged on the support beam and driven by the driving module; the material pressing plate has a vertical movement component and is arranged on the material gripping frame for pressing the prepreg; the plurality of adsorption modules are arranged on the working surface of the material pressing plate for pressing the prepreg;

[0007] The automatic connection system includes a thermal bonding station disposed at the outlet of the positioning and conveying system;

[0008] Wherein: the pressing plate moves with the grabbing frame to drive the adsorbed prepreg to move to a position where the head end overlaps with the tail end of the prepreg previously cut on the thermal bonding station.

[0009] In some embodiments, the prepreg bevel continuous production device also includes a buffer storage system arranged between the automatic connection system and the winding and coating system; the buffer storage system includes at least one active roller and a power part for driving the active roller, and the active roller guides the passing prepreg into the winding and coating system under the action of the power part.

[0010] In some embodiments, the buffer storage system further includes a lifting mechanism and at least one storage roller disposed on the lifting mechanism. The at least one storage roller automatically rises or falls under its own gravity and the tension of the prepreg to adapt to the length of the prepreg in the buffer storage system and adjust the tension of the driving roller.

[0011] In some embodiments, the lifting mechanism includes two guide rails and at least two sliders that cooperate with the guide rails to slide. The guide rails are arranged in the vertical direction, and two shaft ends of the storage roller are respectively connected to one of the sliders to be slidably disposed on the guide rails.

[0012] In some embodiments, the number of the lifting mechanisms is the same as the number of the storage rollers;

[0013] The lifting mechanism further includes a counterweight, a connecting rope, and two pulley assemblies. The two pulley assemblies are arranged at intervals along the lifting direction of the storage roller. The counterweight is connected to the connecting rope, and both ends of the connecting rope respectively bypass one of the pulley assemblies and then are connected to the first storage roller / second storage roller.

[0014] In some embodiments, the driving roller includes a first driving roller and a second driving roller; the storage roller includes a first storage roller and a second storage roller. Along the prepreg conveying direction, the first driving roller, the first storage roller, the second driving roller, and the second storage roller are arranged in sequence;

[0015] The buffer storage system further includes a first pressure roller and a second pressure roller, which are respectively used to press the prepreg against the first driving roller and the second driving roller.

[0016] In some embodiments, the adsorption module is a vacuum suction cup; a first cylinder and a guiding portion are provided on the material grasping frame, and the movable end of the first cylinder passes through the guiding portion and is connected to the pressing plate.

[0017] In some embodiments, the thermal bonding station includes a heating module and a hot pressing module; the heating module includes a support plate and a lower pressing plate, and the lower pressing plate is located above the support plate and is driven by the hot pressing module.

[0018] In some embodiments, along the prepreg conveying direction, the automatic connection system further includes a position adjusting plate and a guide groove disposed behind the position adjusting plate. The position adjusting plate is disposed behind the thermal bonding station; the guide groove is used to guide the prepreg when the prepreg after thermal bonding is conveyed to the buffer storage system under the action of the driving roller.

[0019] In some embodiments, the positioning conveying system, the automatic connection system, and the winding and laminating system are arranged along the cutting direction of the traction cutting system;

[0020] The traction cutting system includes a feeding device, a cutting device, and a check device. The check device is arranged at the inlet of the traction cutting system. The feeding device includes a second cylinder, a ball screw pair, an upper clamping plate driven by the second cylinder, and a lower clamping plate connected to the linear part of the ball screw pair. The cutting device is arranged at the outlet of the traction cutting system and is used for cutting the prepreg clamped and fed by the feeding device.

[0021] As can be seen from the above technical solution, the positioning and conveying system provided by the present invention includes a driving module, a support beam, a material grabbing frame, a pressing plate, and a plurality of adsorption modules. The material grabbing frame is movably arranged on the support beam and is driven by the driving module. The pressing plate has a vertical movement component and is arranged on the material grabbing frame and is used for pressing the prepreg. The plurality of adsorption modules are arranged on the working surface of the pressing plate for pressing the prepreg.

[0022] The automatic connection system includes a thermal bonding station arranged at the outlet of the positioning and conveying system.

[0023] Wherein: the pressing plate moves with the material grabbing frame to drive the adsorbed prepreg to move to a position where the head overlaps with the tail of the prepreg cut in the previous time on the thermal bonding station.

[0024] The main action process of the positioning and conveying system is as follows:

[0025] (1) The driving module drives the material grabbing frame and drives the pressing plate to move above the outlet of the traction cutting system.

[0026] (2) The traction cutting system discharges a fixed length of material. After the pressing plate moves downward to press the material tape, the traction cutting system cuts the material tape.

[0027] (4) After the material tape is cut, the adsorption module on the pressing plate starts to work, and the cut material tape is adsorbed as a whole.

[0028] (5) The pressing plate moves upward, so that the material tape on the pressing plate moves up with the pressing plate.

[0029] (6) The driving module is started, and the material grabbing frame, the pressing plate, and the material tape are moved as a whole to the thermal bonding station, so that the head of the material tape meets the lap length and width requirements with the tail of the previous material tape.

[0030] (7) The pressing plate moves downward, so that the head of the material tape overlaps with the tail area of the previous material tape, and the material tape is released.

[0031] (8) By circulating the above actions, the automatic material taking and conveying of the prepreg can be realized.

[0032] Compared with the technical means of fixing and clamping the cloth tape with mechanical clamps such as pneumatic controlled clamps used in the prior art, this solution adopts the method of adsorption and feeding of materials. The pressing plate is used to press the material tape for cutting, and the cut material tape is grabbed and placed in the bonding station. The product has small deformation and is neatly rolled, which avoids excessive deformation of the prepreg cloth, ensures the quality requirements of the prepreg cloth rolling, improves efficiency and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the automatic bevel cutting and connecting mechanism of the prepreg of the present invention;

[0034] Figure 2 It is a schematic diagram of the film unwinding and peeling system of the present invention;

[0035] Figure 3 is a schematic diagram of a traction cutting system in the present invention;

[0036] Figure 4 It is a schematic diagram of the positioning and conveying system in the present invention;

[0037] Figure 5 is a schematic diagram of the automatic connection system of the present invention;

[0038] Figure 6 It is a schematic diagram of the buffer storage system in the present invention;

[0039] Figure 7 It is a schematic diagram of the winding and coating system in the present invention.

[0040] Description of reference numerals: 1000 - prepreg bevel cutting continuous production device;

[0041] 100-unwinding and film peeling system, 110-unwinding air shaft, 120-first traction roller, 130-first pressing roller, 140-first transmission roller, 150-first tension roller, 160-film peeling air shaft, 170-buffer roller, 180-mounting seat, 190-first deviation correction mechanism;

[0042] 200-traction and cutting system, 210-feeding device, 220-cutting device, 230-non-return device;

[0043] 300-positioning and conveying system, 310-support beam, 320-grabbing frame, 330-pressing plate, 340-driving module, 350-adsorption module, 360-first cylinder, 370-guide part;

[0044] 400-automatic connection system, 410-thermal bonding station, 420-heating module, 421-support plate, 422-lower pressing plate, 430-hot pressing module, 440-position adjustment plate, 450-material guide trough;

[0045] 500-buffer storage system, 510-active roller, 520-lifting mechanism, 521-guide rail, 522-slider, 523-counterweight, 524-connecting rope, 525-pulley assembly, 530-storage roller, 540-third pressing roller, 550-passing roller;

[0046] 600-winding and laminating system, 610-second traction roller, 620-second pressing roller, 630-second tension roller, 640-second transmission roller, 650-winding air shaft, 660-laminating air shaft, 670-installation frame, 680-second deviation correction mechanism, 681-executing unit, 682-second deviation correction sensor, 690-photoelectric switch. DETAILED DESCRIPTION

[0047] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0048] In order to solve the technical problem in the prior art that the bevel cutting of prepregs and continuous production easily cause deformation of the fabric tape, which ultimately affects the quality of the prepreg roll, the present invention provides an automatic bevel cutting and connecting mechanism for prepregs, which has a small product deformation and neat roll, avoids excessive deformation of the prepreg, ensures the roll quality requirements of the prepreg, improves efficiency, and reduces production costs. The content of the present invention is introduced in detail through a specific embodiment.

[0049] Example:

[0050] The embodiment of the present invention provides a prepreg bevel continuous production device 1000, including an unwinding and peeling system 100, a traction and cutting system 200, a positioning and conveying system 300, an automatic connection system 400 and a winding and coating system 600 arranged in sequence along the production line direction, which can realize the automated production of the unwinding and peeling of the prepreg raw material, the cutting of the raw material into sections and strips, the bonding of the cut prepreg and the winding and coating of the finished product. When the bonding step is set for the cut prepreg, the prior art generally adopts a mechanical clamp to fix the cloth tape and convey it to the next process, and the power to enter the next process after thermal bonding is mainly provided by the roller 550 in the winding and coating system 600 that is self-adaptive to the prepreg tension and moves up and down under the tension and its own weight. The roller 550 overcomes the tension by its own weight and moves downward, thereby pulling the thermally bonded material at the thermal bonding station 410, which is very easy to cause the cloth tape to deform, and ultimately affects the quality of the prepreg winding.

[0051] To address the deficiencies in the prior art and avoid deformation of the cloth tape after bonding, in this embodiment, the positioning and conveying system 300 includes a driving module 340, a support beam 310, a material gripping frame 320, a pressure plate 330, and multiple adsorption modules 350; the material gripping frame 320 is movably disposed on the support beam 310 and is driven by the driving module 340; the pressure plate 330 has a vertical movement component and is disposed on the material gripping frame 320 for pressing the prepreg; multiple adsorption modules 350 are disposed on the working surface of the pressure plate 330 for pressing the prepreg to achieve non-interference in different processes. When it is necessary to transfer the prepreg to the next process (thermal bonding), the pressure plate 330 descends to the working position and adsorbs the prepreg, and remains away from the prepreg in other processes without affecting the operation of the traction and cutting system 200; the automatic connection system 400 includes a thermal bonding station 410 disposed at the outlet of the positioning and conveying system 300; adsorb the cut prepreg, and the driving module 340 drives the material gripping frame 320 to move towards the thermal bonding station 410, and the pressure plate 330 moves with the material gripping frame 320 to drive the adsorbed prepreg to move to a position where the head overlaps with the tail of the prepreg cut previously on the thermal bonding station 410, realizing head-to-tail splicing and extending the single-piece prepreg cloth formed by cutting.

[0052] Compared with the prior art's technical means of using mechanical jigs such as pneumatic control jigs to fixedly clamp the cloth tape, this solution adopts the method of adsorbing, picking up, and feeding materials. The pressure plate 330 is used to press the material tape for easy cutting, and to grab and place the cut material tape onto the bonding station. It has characteristics such as small product deformation and neat winding, avoiding excessive deformation of the prepreg cloth, ensuring the winding quality requirements of the prepreg cloth, improving efficiency, and reducing production costs.

[0053] As described above, in the prior art, the gravity of the roller 550 in the winding and laminating system 600 provides the force for the cloth after thermal bonding, which is not easy to control and easily causes deformation of the cloth tape. In order to ensure effective control of the surface quality of the prepreg cloth during transportation, cutting, and winding, the inventive concept of the present invention lies in optimizing the conveying method of the positioning and conveying system 300, and adding a buffer storage system 500 between the automatic connection system 400 and the winding and laminating system 600. The buffer storage system 500 provides an active traction force for the prepreg section after thermal bonding and transmits it to the winding and laminating system 600. At the same time, the buffer storage system 500 can adapt to the production rhythm of the previous process, automatically match the length of the prepreg section entering the buffer storage system 500, be able to control the cloth tape tension during the winding process, realize the tension self-adaptive adjustment during the winding process of the prepreg section, ensure that the deformation of the prepreg cloth is small, and be able to complete the automated high-quality production of the prepreg cloth.

[0054] For the convenience of those skilled in the art to understand the implementation process of this solution, the structure and working process of the prepreg diagonal cutting continuous production device 1000 provided by the present invention will be introduced in detail below according to the production line direction and the production process sequence:

[0055] In the prepreg diagonal cutting continuous production device 1000 provided in this embodiment, since the prepreg cloth itself has a certain viscosity, corresponding film uncovering and film covering are required at the inlet and outlet of the entire device. The specific structure of the unwinding and film uncovering system 100 of the present invention is not limited, and the structure in related technologies can be referred to.

[0056] As an implementation manner, the unwinding and film uncovering system 100 mainly consists of an unwinding air shaft 110, a first traction roller 120, a first pressure roller 130, a first driving roller 140, a first tension roller 150, a film uncovering air shaft 160, a buffer roller 170, etc. As shown in the attached drawings, its functions include constant-tension unwinding of the cloth, constant-tension film uncovering and winding of the film, and closed-loop control of the unwinding speed.

[0057] In this embodiment, one end of the unwinding air shaft 110 is connected with a magnetic powder brake through a safety chuck to provide unwinding resistance; the first traction roller 120 provides unwinding power and is pressed by the first pressure roller 130; there is a first tension roller 150 between the first driving roller 140 and the first pressure roller 130. Tension sensors are provided at both ends of the first tension roller 150 to feedback the tension magnitude. The unwinding speed and unwinding tension are adjusted through the servo motor connected to one end of the unwinding air shaft 110. Both ends of the buffer roller 170 are connected with linear bearings and can rise or fall under the action of the tape tension or the gravity of the roller itself; the film uncovering air shaft 160 supports the material roll and is fixed at both ends through safety chucks. The safety chuck has a limiting function to prevent the material roll from rolling out of the bracket and hitting people or equipment. It is quick to replace and has uniform supporting force. The axial positioning device of the safety chuck uses a VT-type positioning block for positioning, which can effectively guarantee the upper and lower parts of the air shaft.

[0058] In order to improve the wear resistance, in this embodiment, all the rollers in the unwinding and film uncovering system 100 are made of metal rollers, and the surface is coated with a Teflon layer to resist adhesion and wear.

[0059] In order to ensure the subsequent traction feeding accuracy, in this embodiment, the unwinding and film uncovering system 100 further includes a first deviation rectifying mechanism 190. The first deviation rectifying device selects an optoelectronic deviation rectifying control system and adopts an integral structure for deviation rectification. The deviation rectifying signal is feedback through the first deviation rectifying sensor, and the deviation rectifying amount is controlled by a servo cylinder. The mounting seat 180 of the unwinding and film uncovering system 100 adopts a high-strength aluminum alloy steel wallboard structure; structures such as the roller system are all arranged on the mounting seat 180 and are integrally adjusted in position under the drive of the servo cylinder along with the mounting seat 180.

[0060] In order to perform fixed-length feeding and ensure controllability and stability during the feeding and cutting processes, as an implementation, the traction cutting system 200 includes a feeding device 210, a cutting device 220, and a check device 230. The check device 230 is provided at the entrance of the traction cutting system 200 and is used to prevent the prepreg part that has been fed into the traction cutting system 200 from being retracted to the outlet of the unwind and film peeling system 100 under the action of the self-weight of the rollers in the previous process when the feeding stops; the feeding device 210 includes an upper clamping plate driven by a cylinder and a lower clamping plate connected to the linear part of a ball screw; the cutting device 220 is provided at the outlet end of the traction cutting system 200 and is used to cut the prepreg clamped and fed by the feeding device 210 to complete the fixed-length traction feeding and cutting of the cloth tape.

[0061] Specifically, the traction cutting system 200 mainly consists of a feeding device 210, a cutting device 220, and a check device 230. Its function is to complete the fixed-length traction feeding and cutting of the cloth tape. As shown in the attached drawings. The feeding device 210 includes an upper clamping plate and a lower clamping plate. Multiple second cylinders are used to press the upper clamping plate against the lower pressing plate 330 on the frame. The lower pressing plate 330 is driven by a driving member to move the upper pressing plate 330, the lower pressing plate 330, and the raw material clamped by both of them to the set cutting position of the cutting device 220. In this embodiment, the structure and cutting method of the cutting device 220 are not specifically limited. In some implementations, the cutting device 220 can cut the raw material cloth from top to bottom or from the side. As an implementation, the cutting device 220 includes a cutting member and a third cylinder for driving the cutting member, and the cutting member is provided above the lower clamping plate.

[0062] As an implementation, a ball screw pair is provided on the frame of the traction cutting system 200. The lower clamping plate is connected to the linear part of the ball screw pair, and the screw is rotatably provided on the frame to achieve clamping and fixed-length conveying of the raw material.

[0063] The check device 230 in the traction cutting system 200 mainly cooperates with the feeding device 210 to make the check device 230 not work during feeding. When feeding is not performed, that is, when the upper clamping plate and the lower clamping plate are not clamped, the raw material cloth is pressed by the check device 230 to prevent the raw material cloth from slipping back to the unwind and film peeling system 100 in the previous process. As an implementation, the check device 230 includes a pressing plate and a fourth cylinder for controlling the lifting of the pressing plate.

[0064] In this embodiment, the control process of the traction cutting system 200 is as follows: the raw cloth at the outlet of the unwinding and peeling system 100 is pressed against the frame by the non-return device 230, and the second cylinder is started. The second cylinder drives the upper clamping plate located above the lower clamping plate to descend. Under the action of the second cylinder, the upper clamping plate and the lower clamping plate clamp the raw cloth, and the non-return device 230 retreats to release the raw cloth. The lower clamping plate is connected to the straight part of the ball screw pair and is controlled by the servo motor. The screw rotates and feeds the material forward along the axial direction of the screw to the cutting position, and the cutting device 22 0 extends downward, driving the blade set at the telescopic end of the cylinder to move for cutting. After cutting is completed, the third cylinder of the cutting device 220 retreats, and the fourth cylinder of the non-return device 230 presses down to make the pressure plate press the raw cloth. The second cylinder of the feeding device 210 retreats 2mm with the cloth (to prevent the cut material from sticking to the knife and blocking the material). At this time, the non-return device 230 is pressed, and then the second cylinder is released, and after returning to the zero position, it presses down and presses the raw cloth again. The non-return device 230 is released again, and the screw continues to feed forward, and the feeding and cutting are repeated in this cycle.

[0065] In order to realize a continuous automatic line, in this embodiment, the positioning and conveying system 300 , the automatic connection system 400 , and the winding and coating system 600 are arranged along the cutting direction of the traction and cutting system 200 .

[0066] As an implementation manner, the angle between the cutting direction of the traction cutting system 200 and the feeding direction of the traction cutting system 200 is 45°.

[0067] The present invention mainly optimizes the positioning and conveying system 300, which is mainly composed of a support beam 310, a material gripping frame 320, a material holding plate 330, a driving module 340, etc., and is used to press the material strip to be cut for cutting and to grab and place the cut material strip to the thermal bonding station 410. The system moves the material holding plate 330 with a vertical motion component downward to press the material strip and then cuts it through the cutting device 220. After the cutting is completed, the suction module 350 on the material holding plate 330 sucks the material strip, and the material strip is positioned and conveyed to the thermal bonding station 410 through the material gripping frame 320, as shown in the attached figure. Figure 4 shown.

[0068] The present invention does not specifically limit the material gripping frame 320 and the driving module 340. In some embodiments, the material gripping frame 320 can be driven by the driving module 340 to perform curved motion, that is, the material gripping frame 320 itself has a vertical motion component, and the pressing plate 330 only moves with the material gripping frame 320. At this time, the vertical motion component of the pressing plate 330 is realized by the material gripping frame 320 having a vertical motion component. In order to facilitate control and avoid collision and mutual influence between multiple processes, in some embodiments, the pressing plate 330 and the material gripping frame 320 can have relative displacement in different directions, that is, both are driven by the driving module 340 respectively.

[0069] In this embodiment, the driving module 340 is a linear module, which drives the material gripping frame 320 to translate on the support beam 310. A first air cylinder 360 and a guiding part 370 for driving the pressing plate 330 to lift vertically are provided on the material gripping frame 320. The movable end of the first air cylinder 360 passes through the guiding part 370 and is connected to the pressing plate 330 to ensure the path of the pressing plate 330.

[0070] In some embodiments, in order to further ensure the running accuracy of the first air cylinder 360 and the pressing plate 330, the guiding part 370 is a linear bearing.

[0071] In this embodiment, there is no limitation on the specific selection of the adsorption module 350, and the feasible structures in related technologies can be referred to. As an implementation manner, the adsorption module 350 is a vacuum chuck.

[0072] For the sake of simplification and to avoid the material gripping frame 320 occupying space, in this embodiment, the driving module 340 of the material gripping frame 320 is a linear module, which is used to realize the horizontal movement of the material gripping frame 320.

[0073] The main operation process of this system:

[0074] (1) The material gripping frame 320 drives the pressing plate 330 to move above the discharge port of the traction cutting system 200;

[0075] (2) The traction cutting system 200 discharges a fixed length of material;

[0076] (3) After the first air cylinder 360 of the upper pressing plate 330 of the traction cutting system 200 drives the pressing plate 330 to press the material tape, the cutting device 220 is driven to cut the material tape;

[0077] (4) After the material tape is cut, the vacuum chuck on the pressing plate 330 sucks the material tape as a whole;

[0078] (5) The first air cylinder 360 is started, so that the material tape on the pressing plate 330 moves up with the pressing plate 330;

[0079] (6) The linear module is started to move the material tape to the thermal bonding station 410, so that the head of the material tape and the tail of the previous material tape meet the requirements of the overlapping length and width;

[0080] (7) The pressing plate 330 moves down, so that the head of the material tape and the tail area of the previous material tape overlap together, and the material tape is released;

[0081] (8) The above is repeated in a cycle.

[0082] For the thermal bonding of prepregs, in this embodiment, the thermal bonding station 410 includes a heating module 420 and a hot pressing module 430; the heating module 420 includes a support plate 421 and a lower pressing plate 422, and the lower pressing plate 422 is located above the support plate 421 and is driven by the hot pressing module 430 so that when thermal bonding is required, two tape strips that overlap at the head and tail are clamped by the support plate 421 and the lower pressing plate 422.

[0083] As an implementation manner, in order to prevent the lower pressing plate 422 from hindering the transfer of the previous tape strip in place, the hot pressing module 430 includes a telescopic cylinder and a pressing cylinder. The telescopic cylinder makes the lower pressing plate 422 not located directly above the support plate 421 in the zero position state, so that there is enough operating space for the material grabbing frame 320 to drive the adsorbed tape strip into the thermal bonding station 410. The pressing cylinder makes the lower pressing plate 422 lift to press or release the tape strip transferred onto the support plate 421.

[0084] In order to adapt to the position of the prepreg and guide the tape strip to a certain extent when transporting the thermally bonded tape strip to the next process step, and to ensure the alignment during thermal bonding and the quality of the finished product, in this embodiment, along the prepreg conveying direction, the automatic connection system 400 further includes a position adjusting plate 440 and a guide groove 450 provided behind the position adjusting plate 440. The position adjusting plate 440 is provided behind the thermal bonding station 410; the guide groove 450 is used to guide the thermally bonded prepreg when it is transported to the buffer storage system 500 under the action of the driving roller 510, so as to achieve automatic rectification within a small range.

[0085] In summary, in this embodiment, the automatic connection system 400 mainly consists of a hot pressing module 430, a heating module 420, an adjusting plate, a guide groove 450, etc.; the functions achieved are the positioning, bonding, and traction of the tape strip. As shown in the attached drawings. The main action process:

[0086] (1) The heating module 420 is reset: the telescopic cylinder in the hot pressing module 430 retracts, driving the lower pressing plate 422 to move to the leftmost end of the stroke;

[0087] (2) The positioning and conveying system 300 feeds the material;

[0088] (3) The telescopic cylinder in the hot pressing module 430 extends, driving the lower pressing plate 422 to move rightward above the lower heating module 420, and the pressing cylinder is started to make the lower pressing plate 422 move downward to clamp and bond the tape strip on the support plate 421;

[0089] (4) After bonding is completed, the pressing cylinder is released, and the heating module 420 is reset;

[0090] (5) Under the drive of the buffer storage system 500, the bonded tape is moved at a fixed length, so that the tail end of the current tape enters the support plate 421 of the thermal bonding station 410, waiting to be thermally bonded to the head of the tape cut next time, and at the same time, the operation of the buffer storage system 500 is stopped;

[0091] (6) The above cycle.

[0092] In order to solve the technical problems such as deformation caused by the traction of the tape at the thermal bonding station 410, which can adaptively balance the lifting under its own gravity and tension at the entrance of the winding and laminating system 600 in the prior art, in this embodiment, the prepreg diagonal cutting continuous production device 1000 further includes a buffer storage system 500 provided between the automatic connection system 400 and the winding and laminating system 600; the buffer storage system 500 includes at least one driving roller 510 and a power component for driving the driving roller 510. The driving roller 510 guides the passing prepreg into the winding and laminating system 600 under the action of the power component, can actively control the tape tension during the winding process, avoid excessive deformation of the prepreg cloth, ensure neat winding, and can complete the production of prepreg cloth automatically and with high quality.

[0093] In order to further avoid the technical problem of excessive deformation of the prepreg cloth during the winding process, the buffer storage system 500 further includes a lifting mechanism 520 and at least one storage roller 530 provided on the lifting mechanism 520. The at least one storage roller 530 automatically rises or falls under the action of its own gravity and the tension of the prepreg to adapt to the length of the prepreg in the buffer storage system 500 and adjust the tension of the driving roller 510. Along the conveying direction of the buffer storage system 500, the storage rollers 530 are all located behind one driving roller 510 at the entrance.

[0094] As an implementation manner, the number of driving rollers 510 is two, and the number of storage rollers 530 is also two, and the two driving rollers 510 and the two storage rollers 530 are arranged alternately along the conveying direction, that is, the tape passes through the driving roller 510, the storage roller 530, the driving roller 510 and the storage roller 530 in sequence. Of course, structures such as guide rollers 550 can be added to the driving roller 510 and the storage roller 530. This description only refers to the arrangement order of the driving roller 510 and the storage roller 530.

[0095] In some implementation manners, if there are other components between the two spaced storage rollers 530 and it is not convenient to fix them jointly, the number of the lifting mechanisms 520 can be adjusted to be the same as the number of the storage rollers 530. In some implementation manners, if they can be provided on one lifting mechanism 520 at the same time, multiple storage rollers 530 can also be slidably provided on the same lifting mechanism 520.

[0096] As an implementation manner, the lifting mechanism 520 includes two guide rails 521 and at least two sliders 522 that cooperate with and slide on the guide rails 521. The guide rails 521 are arranged in the vertical direction, and the two shaft ends of the storage roller 530 are respectively connected to a slider 522 to be slidably arranged on the guide rails 521.

[0097] To optimize the effect of tension adjustment, as an implementation manner, as shown in the figure, the lifting mechanism 520 further includes a counterweight 523, a connecting rope 524, and two pulley assemblies 525. The two pulley assemblies 525 are arranged at intervals along the lifting direction of the storage roller 530. The counterweight 523 is connected to the connecting rope 524, and both ends of the connecting rope 524 are respectively wound around a pulley assembly 525 and then connected to a storage roller 530.

[0098] In this embodiment, the two storage rollers 530 are respectively connected to the sliders 522 of the guide rails 521 through adapter plates and are connected to the counterweight 523 through pulley groups, which are used to respectively and adaptively adjust the belt tension when the two storage rollers 530 move downward to prevent the belt from being deformed too much.

[0099] To match the adjustment requirements, the weight of the counterweight 523 is respectively less than the weight of the corresponding connected storage roller 530.

[0100] To cooperate with the driving roller 510 to actively convey the material tape, in this embodiment, the buffer storage system 500 further includes a third pressing roller 540 for pressing the prepreg against the driving roller 510 to ensure that the material tape at the outlet of the automatic connection system 400 is actively conveyed to the winding and laminating system 600 stably.

[0101] To prevent warping, in this embodiment, the prepreg sequentially bypasses the driving roller 510 and the third pressing roller 540 at the entrance along the material conveying direction of the buffer storage system 500, and the prepreg is wound in an S shape between the driving roller 510 and the third pressing roller 540 and is led out by the third pressing roller 540 and connected to a turning roller 550 before the first storage roller 530. A set of driving roller 510 and third pressing roller 540 is also arranged between the two storage rollers 530. Finally, the prepreg is introduced into the entrance of the winding and laminating system 600 through the turning roller 550 arranged at the outlet.

[0102] In summary, the buffer storage system 500 mainly consists of a roller system for traction and a buffer mechanism for buffer storage (the buffer mechanism includes a storage roller 530, a lifting mechanism 520, mating blocks, pulleys, etc.). Its function is to provide buffer storage before the cloth tape is wound. As shown in the attached drawings. One end of two driving rollers 510 is connected to a speed reducer and a servo motor to provide traction power; two third pressure rollers 540 adopt a swing arm structure, and one end is connected to a cylinder, which tightly presses on the driving roller 510 during operation. Two storage rollers 530 are connected to the slider 522 of the guide rail 521 through a transfer plate, and are both connected to a counterweight block 523 through a pulley assembly 525 to respectively adjust the cloth tape tension when the two storage rollers 530 move downward and prevent the cloth tape from being deformed too much. In this system, each roller is made of a metal roller, and a layer of polytetrafluoroethylene is coated on the surface to resist adhesion and wear.

[0103] The continuously adhesively joined cloth tape end to end needs to be wound, and film is applied before winding to prevent adhesion. In this embodiment,

[0104] To achieve this purpose, in some embodiments, a roller system for winding and a roller system for film application can be directly provided at the outlet of the buffer storage system 500.

[0105] To further avoid cloth tape deformation, achieve neat winding, and ensure the winding quality requirements of the prepreg, in this embodiment, the winding and film application system 600 mainly consists of a winding and film application assembly and a traction and pressure assembly, etc. Its function is to neatly wind the adhesively joined cloth tape after film application, so that the winding and film application system 600 has the same active driving effect as the buffer storage system 500. As an implementation method, as shown in the attached drawings, the traction and pressure assembly includes a second traction roller 610, a second pressure roller 620, a second tension roller 630, and a second drive roller 640. The second traction roller 610 is arranged at the inlet, and one end is connected to a speed reducer and a servo motor to provide traction power; the second pressure roller 620 adopts a swing arm structure, and one end is connected to a cylinder, which tightly presses on the traction roller during operation. A second tension roller 630 is installed between the winding and film application assembly and the second traction roller 610 to control the rotation speed of the servo motor through cloth tape tension feedback to achieve constant tension control. The winding and film application assembly includes a winding air shaft 650 and a film application air shaft 660. One end of the winding air shaft 650 is connected to a speed reducer and a servo motor to provide winding power; the winding air shaft 650 adopts a single-axis cantilever structure, with quick replacement and uniform tension; the film application air shaft 660 is powered by the movement of the film application, and a magnetic powder brake is connected to one end, and the rotation speed of the air shaft is controlled by controlling the torque size; a second tension roller 630 is installed between the film application air shaft 660 and the winding air shaft 650 to control the rotation speed of the winding air shaft 650 through film tension feedback to achieve constant tension control.

[0106] In order to make the tension feedback of the second tension roller 630 and the second tension roller 630 more accurate, in this embodiment, a second drive roller 640 is provided between the second tension roller 630 and the second tension roller 630 and the adjacent rollers.

[0107] In order to achieve the roll change prompt, in this embodiment, the winding and laminating system 600 includes a photoelectric switch 690 for detecting the winding diameter, and an alarm is given when the predetermined detection diameter is reached to realize the roll change reminder function.

[0108] In order to achieve position adjustment and ensure the position of the entire winding and laminating assembly, in this embodiment, the winding and laminating system 600 further includes a second deviation rectifying mechanism 680. The deviation rectification adopts the overall deviation rectification method, that is, the winding and laminating assemblies are all installed on the same installation frame 670, and the installation frame 670 is driven by the second deviation rectifying mechanism 680 to adjust the position. As an implementation manner, the second deviation rectifying mechanism 680 includes an execution part 681 and a second deviation rectifying sensor 682 provided on the installation frame 670. The deviation rectifying sensor detects the positional relationship between the installation frame 670 and the material tape and feeds back a signal, and the execution part 681 drives the installation frame 670 to move to adjust the position.

[0109] As an implementation manner, the execution part 681 is a servo electric cylinder connected to the installation frame 670, and the deviation rectification amount is accurately controlled by the servo electric cylinder to ensure the winding and laminating accuracy.

[0110] Since the prepreg has viscosity, in order to ensure the normal cooperation between the roll system and the prepreg and the final prepreg quality, in this embodiment, a layer of polytetrafluoroethylene is coated on the surface of the metal roll for each roll system used in each system to resist adhesion and wear.

[0111] A specific implementation manner is used to introduce and illustrate the main action process of the positioning and conveying system 300 in the prepreg diagonal cutting continuous production device 1000 provided by the present invention:

[0112] (1) The linear module drives the material grasping frame 320 and drives the pressure plate 330 to move above the discharge port of the traction cutting system 200. The distance between the pressure plate 330 and the traction cutting system 200 is 5 mm;

[0113] (2) The traction cutting system 200 discharges materials at a fixed length. The discharge length is 60 - 120 mm, which can be adjusted according to actual production requirements;

[0114] (3) The first cylinder 360 extends, drives the pressure plate 330 to press the material tape, and then the traction cutting system 200 cuts the material tape. The maximum cutting thickness is 0.5 mm, and the cutting angle is 45°;

[0115] (4) After the material tape cutting is completed, the vacuum suction cup on the pressure plate 330 starts to work to integrally adsorb the material tape;

[0116] (5) Start the first cylinder 360 on the material grabbing frame 320 to move the material tape on the pressure plate 330 upward along with the pressure plate 330;

[0117] (6) Start the linear module to move the material tape to the thermal bonding station 410 so that the head of the material tape meets the lap length and width requirements with the tail of the previous material tape;

[0118] (7) The pressure plate 330 moves downward under the action of the first cylinder 360 to lap the head of the material tape with the tail area of the previous material tape and release the material tape;

[0119] (8) By cycling the above actions, the automatic material taking of the prepreg can be realized.

[0120] In view of the technical deficiencies in the automatic bevel cutting connection of prepregs, the present invention has developed a bevel cutting connection mechanism suitable for prepregs. During production, this mechanism can control the tape tension during unwinding and rewinding, avoid excessive deformation of the prepreg, ensure neat rewinding, and can complete the production of prepregs automatically and with high quality.

[0121] By using a combination of a magnetic powder brake and a tension sensor and a deviation rectifying device to control unwinding and rewinding, it is possible to achieve constant unwinding and rewinding tensions, small product deformation, and neat rewinding, etc., ensuring the quality requirements for the rewinding of prepregs.

[0122] Although the preferred embodiments of the present application have been described, those of ordinary skill in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0123] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A prepreg diagonal cutting continuous production device, characterized in that, It includes the unwinding and film peeling system, traction and cutting system, positioning and conveying system, automatic connection system and winding and film coating system which are arranged in sequence along the production line direction; The positioning and conveying system comprises a driving module, a support beam, a material gripping frame, a material pressing plate and a plurality of adsorption modules; the material gripping frame is movably arranged on the support beam and driven by the driving module; the material pressing plate has a vertical movement component and is arranged on the material gripping frame for pressing the prepreg; the plurality of adsorption modules are arranged on the working surface of the material pressing plate for pressing the prepreg; The automatic connection system includes a thermal bonding station disposed at the outlet of the positioning and conveying system; Wherein: the pressing plate moves with the gripping frame to drive the adsorbed prepreg to move to a position where the head end overlaps with the tail end of the prepreg previously cut on the thermal bonding station; The prepreg beveling continuous production device also includes a buffer storage system arranged between the automatic connection system and the winding and coating system; the buffer storage system includes at least one active roller and a power member for driving the active roller, and the active roller guides the passing prepreg into the winding and coating system under the action of the power member; The buffer storage system further comprises a lifting mechanism and at least one storage roller arranged on the lifting mechanism, wherein the at least one storage roller automatically rises or falls under the action of its own gravity and the tension of the prepreg, so as to adapt to the length of the prepreg in the buffer storage system and adjust the tension of the active roller; The lifting mechanism also includes a counterweight, a connecting rope and two pulley assemblies, wherein the two pulley assemblies are arranged at intervals along the lifting direction of the storage roller, the counterweight is connected to the connecting rope, and the two ends of the connecting rope are respectively wrapped around one of the pulley assemblies and connected to the at least one storage roller.

2. The prepreg diagonal cutting continuous production device according to claim 1, characterized in that, The lifting mechanism comprises two guide rails and at least two sliding blocks slidingly cooperating with the guide rails. The guide rails are arranged along the vertical direction. The two axial ends of the storage roller are respectively connected to one of the sliding blocks so as to be slidably arranged on the guide rails.

3. The prepreg diagonal cutting continuous production device according to claim 2, characterized in that, The number of the lifting mechanisms is the same as the number of the storage rollers.

4. The prepreg diagonal cutting continuous production device according to any one of claims 1-3, characterized in that, The active roller comprises a first active roller and a second active roller; the storage roller comprises a first storage roller and a second storage roller, and along the conveying direction of the prepreg, the first active roller, the first storage roller, the second active roller and the second storage roller are arranged in sequence; The buffer storage system further comprises a first pressing roller and a second pressing roller, which are used to press the prepreg against the first active roller and the second active roller respectively.

5. The prepreg diagonal cutting continuous production device according to any one of claims 1-3, characterized in that The adsorption module is a vacuum suction cup; the grabbing frame is provided with a first cylinder and a guide part, and the movable end of the first cylinder is passed through the guide part and connected to the pressing plate.

6. The prepreg diagonal cutting continuous production device according to any one of claims 1-3, characterized in that, The thermal bonding station comprises a heating module and a hot pressing module; the heating module comprises a supporting plate and a lower pressing plate, the lower pressing plate is located above the supporting plate and is driven by the hot pressing module.

7. The prepreg diagonal cutting continuous production device according to claim 6, wherein, Along the conveying direction of the prepreg, the automatic connection system further includes a position adjustment plate and a material guiding groove arranged behind the position adjustment plate. The position adjustment plate is arranged behind the thermal bonding station; the material guiding groove is used for guiding the prepreg when the prepreg after thermal bonding is conveyed to the buffer storage system under the action of the driving roller.

8. The prepreg diagonal cutting continuous production device according to any one of claims 1-3, characterized in that, The positioning and conveying system, the automatic connection system, and the winding and film covering system are arranged along the cutting direction of the traction and cutting system; The traction and cutting system includes a feeding device, a cutting device, and a check device. The check device is arranged at the entrance of the traction and cutting system; the feeding device includes a second cylinder, a ball screw pair, an upper clamping plate driven by the second cylinder, and a lower clamping plate connected to the linear part of the ball screw pair; the cutting device is arranged at the outlet of the traction and cutting system and is used for cutting the prepreg clamped and conveyed by the feeding device.

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