A prepreg cutting machine

Abstract

The utility model provides a kind of prepreg cutting machine, belong to cutting device technical field, it includes: feeding frame, material roll is arranged on it;Cutting bed, cutting tool capable of moving on plane is arranged on it, support layer made of breathable material is arranged on cutting bed, support layer is annularly arranged and can be circulated and rolled, a plurality of air holes are arranged on the bed surface of cutting bed, and the air hole is connected with aeration equipment;Material pulling frame can move along the length direction of cutting bed, and material pulling frame is used to drive support layer and material on support layer to move together;The air hole in cutting bed is communicated with aeration equipment and exports air during the circulation and rolling of support layer, and air cushion is formed between support layer and bed surface, which significantly reduces the frictional resistance between the two;After support layer and material move to predetermined cutting position, aeration equipment switches to suction mode, and air hole generates negative pressure to tightly adsorb material on the surface of support layer, to ensure cutting accuracy and quality.

Description

Technical Field

[0001] This utility model belongs to the field of cutting device technology, and in particular relates to a prepreg cutting machine. Background Technology

[0002] Prepregs are functional composite materials made by pre-impregnating reinforcing fibers (such as carbon fiber and glass fiber) into a resin matrix and then partially curing them. They are widely used in high-end fields such as aerospace, automobile manufacturing, wind power equipment, and sporting goods. Due to their directional, adhesive, and easily damaged properties, subsequent processing, especially the cutting process, places extremely high demands on the precision, stability, and material protection capabilities of the equipment.

[0003] Traditional prepreg cutting methods often employ a fixed platform with manual or semi-automatic feeding, which suffers from problems such as unstable feeding, easy material slippage, and low cutting accuracy. Especially when processing large-sized or highly viscous prepregs, the friction between the material and the worktable is significant, easily leading to tensile deformation or surface damage. Furthermore, if the material cannot be effectively fixed during the cutting process, it is highly susceptible to displacement and wrinkling due to vibration or the force of the cutting tool, severely affecting the quality and consistency of the cut pieces. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a high-efficiency feeding and fixed-cutting prepreg cutting machine.

[0005] The objective of this utility model can be achieved through the following technical solution: a prepreg cutting machine, comprising:

[0006] A feeding rack on which material rolls are mounted;

[0007] A cutting bed is provided with a cutting tool that can move on a plane. The cutting bed is provided with a support layer made of breathable material. The support layer is arranged in a ring and can rotate in a cycle. The cutting bed surface is provided with multiple air holes, which are connected to a ventilation device.

[0008] The material pulling frame is capable of moving along the length of the cutting bed, and the material pulling frame is used to move the support layer and the material on the support layer together.

[0009] In the aforementioned prepreg cutting machine, the cutting bed includes a bed frame, on which multiple bed boards are laid. The upper surface of each bed board forms a bed surface, and each bed board has multiple air holes on its upper surface.

[0010] In the aforementioned prepreg cutting machine, the bed board has a hollow structure inside, and the bottom surface of the bed board is provided with a connecting joint for connection with a ventilation device.

[0011] In the aforementioned prepreg cutting machine, a partitioned air chamber is provided at the bottom of the bed frame. The partitioned air chamber includes an air chamber body, and a partitioned cavity is provided inside the air chamber body. Multiple interfaces are connected to the air chamber body, and each interface is connected to a corresponding bed board. An opening and closing piston is provided at each interface to control the opening and closing of the interface.

[0012] In the aforementioned prepreg cutting machine, a plurality of control cylinders are fixedly installed on the air tank body. The output end of each control cylinder is fixed to the opening and closing piston. When the opening and closing piston is in the closed state, a gap is left between the side of the opening and closing piston and the cavity wall of the partition cavity to form a flow cavity.

[0013] In the aforementioned prepreg cutting machine, multiple support rods are linearly distributed on the bed frame along the length direction of the cutting bed. The length direction of each support rod is perpendicular to the length direction of the cutting bed. Support seats are provided on the opposite faces of two adjacent support rods. The bed board is fixed on the support seats, and the position of the support seats along the length direction of the support rods is adjustable.

[0014] In the aforementioned prepreg cutting machine, the support rod is provided with a sliding groove, and a locking nut is provided in the sliding groove. The locking nut is located in the sliding groove and can slide relative to the sliding groove. The support base is provided with a connecting screw, and the connecting screw is screwed to the locking nut to clamp and fix the support base.

[0015] In the aforementioned prepreg cutting machine, the support base is L-shaped, the vertical end of the support base is connected to the locking nut, and the horizontal end of the support base is provided with a waist-shaped hole, through which a fastening screw passes and is connected to the bed board.

[0016] In the aforementioned prepreg cutting machine, a receiving tray is provided at one end of the cutting bed opposite to the feeding frame. A collection rack is provided on the receiving tray, and two suction cups are provided on the collection rack. The positions of the two suction cups on the collection rack are adjustable.

[0017] In the aforementioned prepreg cutting machine, the receiving tray can move along the length of the cutting bed.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: the material pulling frame drives the clamping device to synchronously pull the support layer and the material on it during the movement, realizing efficient and stable continuous feeding; during the cyclic rolling of the support layer, the air holes in the cutting bed are connected to the ventilation equipment and air is released to the outside, forming an air cushion between the support layer and the bed surface, which significantly reduces the frictional resistance between the two, reduces running wear, and improves the smoothness of movement and positioning accuracy; when the support layer and the material move to the predetermined cutting position, the ventilation equipment switches to the suction mode, and the air holes generate negative pressure to tightly adsorb the material onto the surface of the support layer, effectively preventing the material from shifting or wrinkling during the cutting process, and ensuring cutting accuracy and quality. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the cutting bed;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the partitioned air chamber;

[0022] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the bed board;

[0024] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure;

[0025] Figure 7 This is a three-dimensional structural diagram of the cutting bed;

[0026] Figure 8 This is a partial structural diagram of the bed frame.

[0027] In the diagram, 100 is the feeding rack; 200 is the cutting bed; 201 is the support layer; 202 is the bed frame; 203 is the bed board; 204 is the partition board; 300 is the material pulling rack; 301 is the cutting tool; 302 is the marking tool; 400 is the partition air tank; 401 is the air tank body; 402 is the partition cavity; 403 is the interface; 404 is the opening and closing piston; 405 is the control cylinder; 500 is the support rod; 501 is the support base; 502 is the sliding slot; 503 is the waist-shaped hole; 600 is the receiving tray; 601 is the collecting rack; and 602 is the suction cup. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] like Figures 1-8 As shown, a prepreg cutting machine includes:

[0031] A feeding rack 100 is provided with a material roll;

[0032] A cutting bed 200 is provided with a cutting tool 301 that can move on a plane. A support layer 201 made of breathable material is provided on the cutting bed 200. The support layer 201 is arranged in a ring and can be rolled in a cycle. Multiple air holes are provided on the bed surface of the cutting bed 200 and the air holes are connected to a ventilation device.

[0033] The material pulling frame 300 is capable of moving along the length of the cutting bed 200, and the material pulling frame 300 is used to move the support layer 201 and the material on the support layer 201 together.

[0034] The prepreg cutting machine provided in this application uses a material pulling frame 300 to drive the clamping device to synchronously pull the support layer 201 and the material on it during movement, achieving efficient and stable continuous feeding. During the cyclic rolling of the support layer 201, the air holes in the cutting bed 200 are connected to the ventilation equipment and release air to the outside, forming an air cushion between the support layer 201 and the bed surface, which significantly reduces the frictional resistance between the two, reduces running wear, and improves the smoothness of movement and positioning accuracy. When the support layer 201 and the material move to the predetermined cutting position, the ventilation equipment switches to the suction mode, and the air holes generate negative pressure to tightly adsorb the material onto the surface of the support layer 201, effectively preventing the material from shifting or wrinkling during the cutting process, and ensuring cutting accuracy and quality.

[0035] It should be noted that the material pulling frame 300 can be implemented using existing technology, so it will not be described in detail here. The material pulling frame 300 further integrates a cutting tool 301 and a marking tool 302 that can move independently along its own length. Both are mounted on the transverse guide rail or sliding module of the material pulling frame 300 and can achieve precise positioning and dynamic switching through an independent drive system (such as a linear motor, stepper motor with belt or lead screw). The marking tool 302 can mark the surface of the prepreg material before or after cutting, such as printing numbers, batches, directional arrows, QR codes, etc., according to process requirements, to facilitate subsequent identification, traceability and assembly.

[0036] The support layer 201 can be made of felt. Felt has good air permeability, flexibility, and surface friction properties, which can meet the multiple functional requirements of the support layer 201 in the prepreg cutting process. Under the action of the ventilation equipment of the cutting bed 200, gas can pass through the felt layer evenly. In addition, the felt has good wear resistance and resilience, and is not easily deformed or collapsed under long-term repeated rolling and air pressure, which can maintain stable surface flatness and ensure cutting quality.

[0037] Furthermore, the cutting bed 200 includes a bed frame 202, on which multiple bed boards 203 are laid. The upper surface of the bed boards 203 forms the bed surface, and each bed board 203 has multiple air holes on its upper surface.

[0038] In this application, multiple bed boards 203 are laid along both the length and width directions of the cutting bed 200, facilitating independent control of airflow in different areas and achieving zoned air cushion support and zoned adsorption. Based on the length and width of the material, the air outlet function of the corresponding bed board 203 is selectively activated, forming a localized air cushion under the support layer 201, effectively reducing frictional resistance and unnecessary gas consumption, thus improving energy efficiency. When the material moves into position and is cut, the suction function of the bed board 203 in the specific area where the material is located can be activated, generating localized negative pressure to firmly adsorb it, preventing energy waste or airflow interference caused by large-area suction. Furthermore, a partition plate 204 is provided within the bed board 203 to divide the hollow area within the bed board 203, thereby creating at least two zones for control.

[0039] Specifically, the bed board 203 is designed with a hollow cavity structure. The ventilation device supplies air to the bed board 203 through the connecting joint on the bottom. The gas first fills the entire hollow cavity, and after being evenly distributed within the internal airflow, it is then evenly sprayed out through multiple air holes distributed on the upper surface of the bed board 203. This structure allows the gas to be buffered and stabilized within the bed board 203, effectively avoiding localized airflow concentration or uneven spraying. This forms a stable and continuous air cushion layer between the support layer 201 and the bed surface, further reducing the frictional resistance of the support layer 201 during its cyclic rolling, and improving smooth movement and stable operation. At the same time, when switching to the suction mode, the hollow cavity can also serve as a negative pressure adsorption channel, firmly adsorbing the material onto the surface of the support layer 201 with the uniform negative pressure generated by the air holes, preventing displacement or wrinkling during the cutting process.

[0040] Further specifying, a partitioned air chamber 400 is provided at the bottom of the bed frame 202. This partitioned air chamber 400 includes an air chamber body 401, and partitioned chambers 402 serving as a common main air passage. These chambers are connected to the hollow cavities of the corresponding areas of the bed board 203 via independent interfaces 403. Each interface 403 is equipped with an opening / closing piston 404 for precise control of the air passage's opening and closing. This allows for independent control of airflow in different areas of the cutting bed 200.

[0041] Further, multiple control cylinders 405 are fixedly installed on the air bag body 401. The output end of each control cylinder 405 is fixed to the opening and closing piston 404. When the opening and closing piston 404 is in the closed state, a gap is left between the side of the opening and closing piston 404 and the cavity wall of the partition cavity 402 to form a flow cavity. Furthermore, an electromagnetic valve is installed on the air bag body 401 to perform system control on all control cylinders 405.

[0042] like Figures 3-4 As shown in the diagram, in one specific embodiment, the air bag body 401 is positioned in the middle of the cutting bed 200. The interfaces 403 on the air bag body 401 are sequentially distributed along its length on both sides, which helps to shorten the air path, achieve balanced air supply to both bed plates 203, reduce pressure loss, and improve airflow response speed. The control cylinder 405 is located on the side opposite to the interfaces 403. The output shaft of the control cylinder 405 is fixed to the opening and closing piston 404. The partitioned chamber 402 serves as a common main air passage, uniformly inputting and distributing gas from the ventilation equipment to each interface 403, achieving efficient and uniform air supply. By driving each opening and closing piston 404 with an independently set control cylinder 405, precise and independent control of the air supply status of each bed plate 203 can be achieved, meeting the process requirements of blowing or sucking air as needed in different areas. The key is that when a certain piston 404 closes to cut off the air passage of the corresponding bed plate 203, the flow cavity formed by the gap between it and the cavity wall provides a bypass channel for the gas, avoiding the phenomenon that the airflow of the entire partition cavity 402 is blocked due to the closure of a single piston, and ensuring the normal ventilation and functional operation of the area where other interfaces 403 are located.

[0043] Meanwhile, the presence of the flow cavity also has a buffering effect, which can reduce pressure fluctuations during airflow switching, prevent aerodynamic impact, and extend equipment life.

[0044] Specifically, along the length of the cutting bed 200, multiple support rods 500 are linearly distributed on the bed frame 202. The length of each support rod 500 is perpendicular to the length of the cutting bed 200. Support seats 501 are provided on the opposite surfaces of two adjacent support rods 500. The bed board 203 is fixed on the support seats 501, and the position of the support seats 501 in the length of the support rods 500 is adjustable.

[0045] This structure, through the cooperation of multiple transverse support rods 500 and adjustable support bases 501, achieves stable support and precise positioning of the bed board 203. The transverse position of the support base 501 on the support rods 500 is adjustable, allowing for easy adjustment of its position within the transverse plane of the cutting bed 203 during installation or replacement. This ensures that the bed boards 203 are joined smoothly with uniform gaps, preventing assembly errors that could lead to poor rolling of the support layer 201 or the formation of steps or jamming.

[0046] Meanwhile, this design adapts to the replacement needs of bed boards 203 of different specifications, improving the modularity and ease of maintenance of the equipment. After long-term operation, if local support deformation or wear occurs, the installation error can be compensated by fine-tuning the position of the support seat 501, restoring the overall flatness of the bed surface and ensuring the smooth operation of the support layer 201 and the continuity of material conveying. In addition, the linearly distributed multiple support rods 500 effectively improve the overall structural rigidity of the cutting bed 200, preventing the bed board 203 from bending and deforming under air pressure or external force loading, ensuring that the air hole distribution surface is always on the same horizontal plane, providing a stable and flat foundation platform for the high-precision adsorption, conveying and cutting of prepreg.

[0047] The support rod 500 is provided with a sliding groove 502, and a locking nut is provided in the sliding groove 502. The locking nut is located in the sliding groove 502 and can slide relative to the sliding groove 502. The support base 501 is provided with a connecting screw, which is screwed into the locking nut to clamp and fix the support base 501. This structure, through the cooperation of the sliding groove 502 and the locking nut, realizes stepless adjustment of the support base 501 along the length of the support rod 500. During installation or adjustment, simply loosen the connecting screw, slide the locking nut along the sliding groove 502 to move the support base 501 to the desired position, and then tighten the connecting screw to complete the fixation. The operation is simple and the positioning is flexible, which significantly improves the efficiency of the installation and leveling of the bed board 203.

[0048] The support rod 500 has openings at both ends, through which the locking nut slides into the sliding groove 502.

[0049] Furthermore, the support base 501 is L-shaped, with its vertical end connected to the locking nut, and its horizontal end provided with a waist-shaped hole 503, through which the fastening screw passes and connects to the bed board 203.

[0050] The vertical end serves to position and adjust the bed board 203 laterally, allowing for flexible adjustment of its lateral position through connection with the locking nut. The horizontal end supports and secures the bed board 203, with its oblong hole 503 allowing the fastening screws to be adjusted within a certain range along its length, thus enabling fine-tuning of the bed board 203's longitudinal (i.e., the length of the cutting bed 200) positioning. This achieves precise positioning in the horizontal plane, effectively compensating for installation errors, thermal deformation, or misalignment caused by long-term use, ensuring that the upper surfaces of multiple bed boards 203 are of consistent height and the seams are flush after splicing, forming a continuous and flat support surface.

[0051] Based on the above, a receiving tray 600 is provided at one end of the cutting bed 200 opposite to the feeding rack 100. A collection rack 601 is provided on the receiving tray 600. Two suction cups 602 are provided on the collection rack 601. The positions of the two suction cups 602 on the collection rack 601 are adjustable.

[0052] By setting a receiving tray 600 at the discharge end of the cutting bed 200, the orderly reception and temporary storage of cut materials are achieved, improving operational safety and cleanliness. The two suction cups 602 on the collection rack 601 can be adjusted horizontally or vertically to adapt to the adsorption needs of different sized pieces: for example, for long or irregularly shaped pieces with a shifted center of gravity, the distance and relative position of the two suction cups 602 can be adjusted so that they act on the stable area or near the center of gravity of the piece, achieving balanced adsorption and anti-warping fixation; for small pieces, the suction cups 602 can be arranged close together to avoid excessively scattered adsorption force distribution or the use of only one suction cup 602.

[0053] Furthermore, the receiving tray 600 can move along the length of the cutting bed 200. After cutting is completed, the receiving tray 600 can be automatically or manually controlled to smoothly transport the sheet to an easily accessible position on the side or front of the equipment, allowing operators to perform unloading operations under conditions of clear vision, comfortable posture, and sufficient space, reducing labor intensity and improving unloading efficiency and accuracy, especially suitable for prepreg sheets that are heavy or wide.

[0054] The bed frame 202 is equipped with a slide rail, and the receiving tray 600 is equipped with a slider. The slider slides in conjunction with the slide rail. The bed frame 202 is also equipped with a drive unit, which drives a transmission belt. A transmission part is fixedly mounted on the receiving tray 600 and is fixed to the transmission belt. The drive unit is fixedly connected to the transmission part on the receiving tray 600 via the transmission belt, achieving smooth, continuous, and precisely controllable reciprocating motion.

[0055] It should be noted that after the prepreg is pulled to the predetermined cutting position and precisely positioned by the pulling frame 300, the cutting tool 301 integrated on the pulling frame 300 immediately starts to cut the prepreg, achieving "cutting as soon as it is in place", reducing idle waiting time and improving the work cycle. When the continuous cutting reaches the set length or the cutting of a piece of material is completed, the collecting rack 601 on the receiving tray 600 starts and moves along the length of the cutting bed 200 towards the discharge end, so that the suction cup 602 on it is accurately aligned under the cut piece of material, ready to receive it.

[0056] Crucially, during the subsequent cutting process, the collecting rack 601 and the pulling rack 300 work in tandem: when the pulling rack 300 moves the cutting tool 301 backward in the feeding direction to prepare for cutting the next section of prepreg, the collecting rack 601 moves forward simultaneously (towards the cutting area), gradually and smoothly lifting and moving the cut pieces outward, achieving a parallel operation mode of cutting and collecting simultaneously. This synchronous operation mechanism allows the cutting action and the material collection preparation process to overlap in time, effectively avoiding the time waste caused by the traditional serial process of "cutting first and then collecting."

[0057] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0059] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A prepreg cutting machine, characterized in that, include: A feeding rack on which material rolls are mounted; A cutting bed is provided with a cutting tool that can move on a plane. The cutting bed is provided with a support layer made of breathable material. The support layer is arranged in a ring and can rotate in a cycle. The cutting bed surface is provided with multiple air holes, which are connected to a ventilation device. The material pulling frame is capable of moving along the length of the cutting bed, and the material pulling frame is used to move the support layer and the material on the support layer together.

2. The prepreg cutting machine according to claim 1, characterized in that, The cutting bed includes a bed frame, on which multiple bed boards are laid. The upper surface of each bed board forms a bed surface, and each bed board has multiple air holes on its upper surface.

3. A prepreg cutting machine according to claim 2, characterized in that, The bed board has a hollow interior, and the bottom surface of the bed board is equipped with a connecting joint for connection to the ventilation equipment.

4. A prepreg cutting machine according to claim 2, characterized in that, The bottom of the bed frame is provided with a partitioned air chamber. The partitioned air chamber includes an air chamber body and a partitioned cavity inside the air chamber body. Multiple interfaces are connected to the air chamber body. Each interface is connected to a corresponding bed board. Each interface is provided with an opening and closing piston to control the opening and closing of the interface.

5. A prepreg cutting machine according to claim 4, characterized in that, Multiple control cylinders are fixedly installed on the main body of the air bag. The output end of each control cylinder is fixed to the opening and closing piston. When the opening and closing piston is in the closed state, a gap is left between the side of the opening and closing piston and the cavity wall of the partition cavity to form a flow cavity.

6. A prepreg cutting machine according to claim 2, characterized in that, Along the length of the cutting bed, multiple support rods are linearly distributed on the bed frame. The length of each support rod is perpendicular to the length of the cutting bed. Support seats are provided on the opposite faces of two adjacent support rods. The bed board is fixed on the support seats, and the position of the support seats along the length of the support rods is adjustable.

7. A prepreg cutting machine according to claim 6, characterized in that, The support rod is provided with a sliding groove, and a locking nut is provided in the sliding groove. The locking nut is located in the sliding groove and can slide relative to the sliding groove. The support base is provided with a connecting screw, and the connecting screw is screwed to the locking nut to clamp and fix the support base.

8. A prepreg cutting machine according to claim 7, characterized in that, The support base is L-shaped, with its vertical end connected to the locking nut, and its horizontal end having a waist-shaped hole through which a fastening screw passes to connect to the bed board.

9. A prepreg cutting machine according to claim 1, characterized in that, A receiving tray is provided on the cutting bed at one end opposite to the feeding rack. A collection rack is provided on the receiving tray, and two suction cups are provided on the collection rack. The positions of the two suction cups on the collection rack are adjustable.

10. A prepreg cutting machine according to claim 9, characterized in that, The receiving tray can move along the length of the cutting bed.

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