Prepreg die cutting device

Abstract

The utility model discloses a prepreg die cutting device which comprises a workbench, a frame body, an air cylinder, a lifting plate, a forming cutter, a lower die base, a rotating roller, a connecting plate, a limiting plate, a screw rod, a control block, a connecting rod, a sliding block, a sliding rod, a nut, a spring, a transverse rod and a pressing roller. The frame body is fixed to the workbench, the air cylinder is installed at the top of the frame body and drives the lifting plate to vertically slide, the forming cutters are evenly installed at the bottom of the lifting plate, and the workbench is provided with a lower die base and a die groove which are matched with the forming cutters. A plurality of rollers are installed on the workbench, raw material plates are placed on the surfaces of the rollers, connecting plates are slidably installed on the two sides of the feeding end, and limiting plates are arranged on the connecting plates and used for limiting the raw material plates; the vertical plate is installed on the front side of the workbench, the threaded rod is rotationally installed between the vertical plate and the lower die base, the control block is arranged on the surface of the threaded rod and connected with the sliding block through the connecting rod, and the sliding block makes contact with the lower portion of the connecting plate to adjust the position of the connecting plate.

Description

Technical Field

[0001] This utility model belongs to the field of semi-cured sheet technology, specifically relating to a semi-cured sheet die-cutting device. Background Technology

[0002] Prepreg is a widely used material in the electronics manufacturing industry, primarily for the lamination process of multilayer printed circuit boards (PCBs). Its quality and processing precision directly affect the performance of the final circuit board. During PCB manufacturing, prepreg typically needs to be die-cut according to design requirements to obtain materials of specific shapes for subsequent lamination processes. However, existing prepreg die-cutting processes have certain limitations in terms of operational precision, material stability, and adaptability to different PCB specifications.

[0003] Currently, traditional die-cutting equipment typically employs a fixed die-cutting structure. When raw material sheets enter the die-cutting process, due to varying sizes, it is difficult to center and align them within the equipment, leading to die-cutting position misalignment and affecting die-cutting accuracy. Furthermore, some equipment lacks effective limiting and adjustment mechanisms, making it difficult to adapt to raw material sheets of different widths, thus limiting the equipment's applicability. On the other hand, during the die-cutting process, raw material sheets are prone to warping or sliding due to external forces, especially during high-speed processing, which can easily affect die-cutting quality, leading to defective products or increased waste. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a prepreg die-cutting device. This device, through an adjustable limiting structure, can maintain stable positioning of raw material sheets of different widths, ensuring the raw material sheet remains centered and thus improving die-cutting accuracy. Simultaneously, a reasonable clamping mechanism provides stable downward pressure on the raw material sheet during feeding, preventing warping and improving feeding stability, thereby enhancing die-cutting quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A prepreg die-cutting device includes a worktable, a frame mounted on the upper surface of the worktable, a cylinder fixed at the top center of the frame, a lifting plate mounted on the output end of the cylinder, the lifting plate sliding vertically inside the frame, forming cutters evenly mounted on the bottom of the lifting plate, a lower die base mounted on the surface of the worktable, the lower die base being positioned directly below the lifting plate, a die groove adapted to the forming cutter being formed on the surface of the lower die base, multiple sets of mounting blocks evenly mounted on the surface of the worktable, two symmetrically arranged mounting blocks in each set, a rotating roller rotatably mounted between two mounting blocks, a raw material sheet placed on the surface of the multiple rotating rollers, connecting plates symmetrically sliding on both sides of the multiple rotating rollers placed at the feeding end, a limiting plate provided on the side of the connecting plates that are close to each other, the limiting plate being used to limit the sides of the raw material sheet, two sliding rods vertically sliding through the end of the connecting plate near the lower die base, a crossbar fixed to the top of the two sliding rods, a pressure roller rotatably mounted on the inner side of the crossbar, the pressure roller being positioned above the raw material sheet, the two pressure rollers pressing down on both sides of the raw material sheet respectively.

[0007] Furthermore, a sliding groove is laterally opened at the feeding end of the upper surface of the worktable, and a vertical plate is fixed on the front side of the center of the upper surface of the worktable. A screw is rotatably installed between the vertical plate and the lower mold base, and the screw is vertically placed above the sliding groove.

[0008] Furthermore, a control block is screwed onto the surface of the screw, the bottom of the control block is in contact with the upper surface of the worktable, and connecting rods are symmetrically hinged on both sides of the control block.

[0009] Furthermore, sliders are symmetrically slidably mounted on the surface of the groove, and the end of the connecting rod away from the control block is respectively hinged to the two sliders, with the top of the sliders mounted below the center of the connecting plate.

[0010] Furthermore, both slide rods are screwed with nuts at their bottoms, and the nuts are located below the connecting plate.

[0011] Furthermore, a spring is fitted onto the surface of the slide rod, and the spring is positioned between the connecting plate and the nut.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention provides a prepreg die-cutting device that, compared with the prior art, can effectively improve die-cutting accuracy, adapt to raw material boards of different specifications, and enhance the feeding stability of raw material boards, thereby improving die-cutting quality and production efficiency.

[0014] This invention features multiple rotating rollers on a worktable and adjustable connecting plates on both sides of the feed end. Limiting plates are mounted on these connecting plates, enabling precise positioning of raw material sheets of varying widths. A rotating screw moves a control block back and forth, which in turn adjusts the position of the connecting plates via a connecting rod and slider. This allows the connecting plates to adapt to different specifications of raw material sheets, ensuring the sheets are always centered and fed to the die-cutting position. Compared to existing die-cutting devices with fixed widths, this design improves the equipment's applicability, avoids die-cutting errors caused by raw material sheet misalignment, and thus enhances die-cutting accuracy.

[0015] This invention features uniformly installed forming cutters at the bottom of a lifting plate, and corresponding lower die holders and die grooves on the upper surface of the worktable. A cylinder drives the lifting plate to perform the punching operation, enabling the forming cutters to efficiently die-cut prepreg sheets. The forming cutters are made of high-strength alloy tool steel and undergo heat treatment to improve wear resistance and service life, ensuring stable die-cutting quality. Compared to traditional die-cutting devices where blade wear easily leads to uneven cutting, this solution effectively improves the durability of the die-cutting blades and reduces quality problems caused by blade wear.

[0016] This invention addresses the issue of raw material board conveying by installing pressure rollers on crossbars and utilizing springs to provide downward pressure. The pressure rollers, made of silicone, possess excellent resilience and high-temperature resistance, helping to ensure the stability of the raw material board during feeding and preventing it from warping or shifting due to vibration or external forces, thus affecting die-cutting accuracy. Compared to traditional die-cutting devices that easily warp the raw material board and affect processing quality, this solution effectively prevents displacement of the raw material board during die-cutting, improving feeding stability and die-cutting consistency.

[0017] This invention utilizes a spring and a sliding rod to provide a stable downward force, thereby driving the crossbar and pressure roller to continuously apply uniform pressure to the raw material sheet. Simultaneously, an adjustable connecting plate allows the equipment to be adapted to raw material sheets of different sizes. The overall structure is rationally designed, easy to operate, and effectively improves the die-cutting accuracy of prepreg, reduces defect rates, and increases production efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the working platform structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the connecting plate installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the control block and the slider of this utility model;

[0022] Figure 5 This is a schematic diagram of the connecting plate and pressure roller structure of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Workbench; 101. Vertical plate; 102. Slide groove; 103. Mounting block; 2. Frame; 3. Lower mold base; 31. Mold groove; 4. Cylinder; 5. Lifting plate; 6. Forming cutter; 7. Rotary roller; 8. Screw; 9. Control block; 10. Connecting rod; 11. Slider; 12. Connecting plate; 121. Limiting plate; 13. Slide rod; 14. Nut; 15. Spring; 16. Crossbar; 17. Pressure roller. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] Example 1:

[0027] refer to Figures 1-5 As shown, a prepreg die-cutting device includes a worktable 1, with a frame 2 mounted on the upper surface of the worktable 1. The frame 2 is made of Q235 carbon steel to ensure structural stability and durability. A cylinder 4, a standard SC63X100 cylinder, is fixed at the center of the top of the frame 2 and is bolted to the top of the frame 2 to provide stable vertical power output. A lifting plate 5 is mounted at the output end of the cylinder 4. The lifting plate 5 is made of 6061 aluminum alloy, which has good corrosion resistance and strength. The lifting plate 5 slides vertically inside the frame 2, and the sliding guide rail is a linear guide rail of model HGH20CA to ensure... The smoothness and precision of the lifting motion; the bottom of the lifting plate 5 is evenly equipped with forming cutters 6, which are made of Cr12MoV alloy tool steel and have undergone heat treatment to ensure cutting sharpness and wear resistance, and improve die-cutting life; the worktable 1 is equipped with a lower die base 3, which is made of high-strength aluminum alloy to reduce weight and improve durability. The lower die base 3 is located directly below the lifting plate 5. The surface of the lower die base 3 is provided with a die groove 31 that matches the forming cutter 6. The size of the die groove 31 is precisely machined according to the specifications of the forming cutter 6 to ensure that the semi-cured sheet after punching can fall smoothly and improve die-cutting accuracy;

[0028] Multiple sets of mounting blocks 103 are evenly installed on the surface of the workbench 1. Each set of mounting blocks 103 has two symmetrically arranged blocks. The mounting blocks 103 are made of 45# steel and have undergone an oxidation treatment to improve wear resistance and corrosion resistance. A rotating roller 7 is rotatably mounted between the two mounting blocks 103. The roller 7 is made of stainless steel and covered with a wear-resistant rubber layer to enhance friction and prevent the raw material plate from slipping during transport. The bearings of the roller 7 are 6001ZZ deep groove ball bearings to reduce rotational resistance and improve conveying efficiency. The raw material plate is placed on the surface of the multiple rollers 7, and the spacing between the rollers 7 is set according to the thickness of the raw material plate to ensure stable transport. Connecting plates 12 slide symmetrically on both sides of the multiple rollers 7 at the feed end. The connecting plates 12 are made of high-strength engineering plastic POM to ensure lightweight and wear resistance. A limit plate 1 is provided on the side of the connecting plates 12 that are close to each other. 21. The limiting plate 121 is made of galvanized steel plate with a wear-resistant coating to prevent wear from prolonged use. The limiting plate 121 is used to limit the two sides of the raw material plate to ensure that the raw material plate always stays in the center and improves the die-cutting accuracy. Two slide rods 13 slide vertically through the end of the connecting plate 12 near the lower die base 3. The slide rods 13 are high-precision linear guide rods with chrome plating to improve wear resistance and corrosion resistance. A crossbar 16 is fixed to the top of the two slide rods 13. The crossbar 16 is made of 6063 aluminum alloy to reduce weight and improve rigidity. A pressure roller 17 is rotatably installed inside the crossbar 16. The pressure roller 17 is made of silicone material, which has good resilience and high temperature resistance. The pressure roller 17 is placed above the raw material plate. The two pressure rollers 17 press down on both sides of the raw material plate to improve the feeding stability of the raw material plate and prevent it from warping during the die-cutting process, which would affect the die-cutting quality.

[0029] refer to Figure 3 and Figure 4 As shown, a sliding groove 102 is laterally opened at the feed end of the upper surface of the worktable 1. The sliding groove 102 is CNC precision machined to ensure dimensional accuracy and improve sliding stability. A vertical plate 101 is fixed to the front center of the upper surface of the worktable 1. The vertical plate 101 is made of 45# steel to enhance the overall structural strength and is fixed to the worktable 1 by welding to ensure its stability. A screw 8 is rotatably installed between the vertical plate 101 and the lower mold base 3. The screw 8 is a T10 ball screw with a nitrided surface to improve wear resistance. The screw 8 is vertically placed above the sliding groove 102. The precise rotation of the screw 8 can accurately adjust the limiting structure and improve adaptability.

[0030] refer to Figure 4 As shown, a control block 9 is screwed onto the surface of the screw 8. The control block 9 is made of aluminum alloy and its bottom contacts the upper surface of the worktable 1. Anti-slip texture is added to the surface of the control block 9 to increase friction and prevent slippage. Connecting rods 10 are symmetrically hinged on both sides of the control block 9. The connecting rods 10 are made of 304 stainless steel to improve corrosion resistance and service life.

[0031] refer to Figure 4 As shown, sliders 11 are symmetrically slidably mounted on the surface of the slide groove 102. The sliders 11 are made of high-strength POM engineering plastic and have a surface lubrication treatment to reduce friction and improve sliding smoothness. The end of the connecting rod 10 away from the control block 9 is respectively hinged to the two sliders 11. The top of the sliders 11 is installed below the center of the connecting plate 12 to ensure the smooth movement of the connecting plate 12 and improve the adjustment accuracy.

[0032] refer to Figure 5 As shown, nuts 14 are screwed onto the bottom of both slide bars 13. The nuts 14 are made of high-precision copper alloy material, which has good wear resistance and corrosion resistance. The nuts 14 are placed below the connecting plate 12 to provide stable axial support.

[0033] refer to Figure 5 As shown, a spring 15 is fitted on the surface of the slide bar 13. The spring 15 is made of 65Mn spring steel and has been quenched to improve its elastic recovery and fatigue resistance. The spring 15 is placed between the connecting plate 12 and the nut 14. The preload of the spring 15 ensures that the nut 14 is always subjected to a downward force, which in turn drives the crossbar 16 to exert downward force through the slide bar 13, so that the pressure roller 17 can stably press the raw material plate, improve the stability of the raw material plate during the feeding process, and prevent the die-cutting accuracy from decreasing due to vibration or displacement.

[0034] Example 2: Optimization of Prepreg Die-Cutting Accuracy Based on Adjustable Limiting Mechanism

[0035] In this embodiment, to improve the die-cutting accuracy of raw material plates of different specifications, multiple rollers 7 are installed on the surface of the worktable 1, and connecting plates 12 are slidably installed on both sides of the feeding end. A limit plate 121 is provided on the side of the connecting plates 12 that are close to each other. The limit plate 121 is made of galvanized steel plate with a thickness of 2mm and coated with a wear-resistant coating to ensure that it is not easily worn during long-term use, and at the same time, it can effectively prevent the raw material plate from shifting due to insufficient friction. The screw 8 is a T10 ball screw, which engages with the control block 9. The control block 9 is symmetrically hinged to the connecting rods 10 on both sides. The end of the connecting rod 10 away from the control block 9 is respectively hinged to two sliders 11. The top of the slider 11 is installed below the center of the connecting plate 12. By adjusting the rotation angle of the screw 8, the control block 9 can move precisely along the axis of the screw 8, thereby driving the connecting rod 10 to adjust the position of the slider 11, so that the connecting plate 12 can adapt to raw material plates of different widths and always keep the raw material plate centered during feeding, thereby improving the die-cutting accuracy.

[0036] Comparison Cases

[0037] In existing technologies, most prepreg die-cutting devices use a fixed-width limiting structure. For example, common die-cutting equipment on the market is only suitable for raw material boards of specific specifications. Because the spacing of the limiting plates cannot be adjusted, the entire limiting assembly needs to be replaced when processing raw material boards of different sizes, increasing the complexity of equipment adjustment and production costs. At the same time, because the limiting mechanism is fixed, narrower raw material boards are prone to shifting during transportation, affecting die-cutting accuracy. This embodiment adopts an adjustable limiting plate structure, which enables the equipment to be compatible with raw material boards of different widths without replacing the limiting assembly. The screw drive system precisely controls the position of the connecting plate 12 to ensure that the raw material board is centered, improving die-cutting accuracy and solving the problems of poor adaptability and cumbersome adjustment in existing technologies.

[0038] Example 3: Optimization of Prepreg Die-Cutting Durability Based on High-Precision Die-Cutting Tools

[0039] In this embodiment, to ensure the die-cutting accuracy of the prepreg, the device employs a high-precision forming cutter 6 and optimizes its working method. The lifting plate 5 is made of 6061 aluminum alloy, which has good corrosion resistance and strength. It slides through a linear guide rail (model HGH20CA) to ensure the smoothness and accuracy of the lifting movement. The forming cutter 6 is made of Cr12MoV alloy tool steel and has undergone vacuum heat treatment to HRC58-62 to improve its wear resistance and service life. The cutting edge is precision machined by CNC, making the cut smoother. During die-cutting, the lifting plate 5 is driven by an SC63X100 cylinder, which enables the forming cutter 6 to punch the raw material plate at high speed. It is precisely aligned with the die groove 31 on the lower die base 3 to ensure that the die-cut prepreg has consistent size, neat cut, and no burrs.

[0040] Comparison Cases

[0041] In traditional die-cutting equipment, some devices use ordinary 45 steel as the die-cutting tool material without professional heat treatment, which makes the cutting edge prone to dulling during continuous die-cutting, resulting in rough cuts or tearing. In addition, some devices do not adopt a precision alignment structure, resulting in large dimensional errors in the finished product after die-cutting. In contrast, this embodiment uses a forming cutter made of Cr12MoV alloy tool steel and undergoes vacuum heat treatment, which improves the wear resistance and cutting accuracy of the tool. At the same time, combined with a high-precision guide rail and die base alignment structure, the edge of the prepreg after die-cutting is neat, improving product consistency and reducing the time and cost of subsequent processing.

[0042] Example 4: Optimization of a Prepreg Conveying System Based on a Stable Feeding Mechanism

[0043] In this embodiment, to improve the stability of the raw material plate during the feeding process, a pressure roller 17 is installed inside the crossbar 16, and a spring 15 provides downward pressure, enabling the pressure roller 17 to continuously apply stable downward pressure to the raw material plate. The pressure roller 17 is made of high-temperature resistant silicone material with a surface hardness of Shore A 50-60, which can effectively buffer external impacts and ensure the smooth operation of the raw material plate during the conveying process. The slide bar 13 is a high-precision linear guide rod with a chrome-plated surface to improve wear resistance. A nut 14 is screwed into the bottom of the slide bar 13. The nut 14 is made of high-precision copper alloy material, which has good wear resistance and corrosion resistance. The tightening force of the nut 14 can be adjusted by the preload of the spring 15, so that the downward pressure of the pressure roller 17 on the raw material plate is always kept within an appropriate range to prevent the raw material plate from warping or shifting during the die-cutting process and improve feeding stability.

[0044] Comparison Cases

[0045] In existing technologies, some prepreg die-cutting devices lack a stable clamping mechanism, relying solely on gravity or simple limiting structures for feeding control. This leads to the raw material sheet easily jumping or shifting during high-speed transport, affecting die-cutting accuracy. Furthermore, some devices use ordinary metal pressure rollers, which, while applying pressure to the raw material sheet, may damage the surface due to their excessively hard contact surface, affecting finished product quality. In contrast, this embodiment uses high-temperature resistant silicone pressure rollers, combined with a spring pre-tensioning adjustment mechanism, ensuring the raw material sheet remains stable during transport, preventing shifting or warping, improving feeding consistency, and guaranteeing die-cutting quality.

[0046] Example 5: Improved Stability of Prepreg Die-Cutting Device Based on Overall Structural Optimization

[0047] In this embodiment, to improve the stability of the entire die-cutting device, the workbench 1 is made of Q235 carbon steel and the overall rigidity is enhanced by a reinforcing rib structure to reduce the decrease in accuracy caused by vibration during long-term use; the frame 2 is also made of Q235 carbon steel and is processed by laser cutting and precision welding to ensure structural stability; all connection parts are fixed with high-strength bolts (grade 12.9) and anti-loosening washers are added to prevent the equipment from loosening due to vibration after long-term operation.

[0048] Comparison Cases

[0049] In existing technologies, some die-cutting equipment uses ordinary thin steel plates for its worktable. Due to the lack of reinforcing structures, the equipment may deform due to stress accumulation after long-term use, resulting in a decrease in die-cutting accuracy. In addition, some equipment does not use anti-loosening bolts, which may cause the connecting parts to loosen due to vibration during long-term operation, affecting the die-cutting stability. In contrast, this embodiment improves the overall stability of the equipment by optimizing the structural design of the worktable and frame and adopting a high-strength connection method, ensuring that the equipment can maintain a high-precision die-cutting effect even after long-term operation.

[0050] Through the optimization of the above embodiments, the prepreg die-cutting device of this utility model is superior to the prior art in terms of adaptability, die-cutting accuracy, feeding stability, equipment durability and overall stability, which improves production efficiency, reduces defect rate and provides reliable technical support for high-quality die-cutting of prepregs.

[0051] The working principle of this utility model is as follows: When in use, according to the shape to be die-cut, the corresponding lower mold base 3 and forming cutter 6 are installed. The raw material plate is moved to the surface of the lower mold base 3, and the forming cutter 6 punches the raw material plate. The semi-cured sheet after punching falls down through the mold groove 31. During this process, the distance between the two connecting plates 12 is adjusted according to the width of the raw material plate to limit the two sides of the raw material plate. When adjusting, the screw 8 is rotated to control the back and forth movement of the control block 9, so that the control block 9 moves along the axis of the screw 8. The movement of the control block 9 can drive the slider 11 to move closer or further away through the two connecting rods 10, and then control the position of the connecting plate 12 through the slider 11, so that the connecting plate 12 can adapt to raw material plates of different widths, so as to ensure that the raw material plate is always placed in the center position when moving, thereby ensuring the die-cutting accuracy.

[0052] Furthermore, due to the presence of spring 15, nut 14 is always subjected to a downward force, which in turn drives crossbar 16 to have a downward force through slide bar 13. The raw material plate is placed between pressure roller 17 and rotating roller 7 so that the pressure roller 17 presses down on the raw material plate, improving the stability of the raw material plate during feeding and preventing the raw material plate from warping during die cutting, thus affecting the die cutting quality.

[0053] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A prepreg die-cutting apparatus comprising a worktable (1), characterised in that: The workbench (1) upper surface is provided with a frame (2), the top center of the frame (2) is fixed with a cylinder (4), the output end of the cylinder (4) is provided with a lifting plate (5), the lifting plate (5) vertically slides in the inside of the frame (2), the bottom of the lifting plate (5) is uniformly provided with a shaped cutter (6), the workbench (1) surface is provided with a lower die holder (3), the lower die holder (3) is placed directly below the lifting plate (5), the surface of the lower die holder (3) is provided with a die groove (31) matched with the shaped cutter (6), the workbench (1) surface is uniformly provided with a plurality of mounting blocks (103), each group of mounting blocks (103) is provided with two symmetrically, two mounting blocks (103) are rotatably installed with a rotating roller (7), the raw material plate is placed on the surface of the rotating roller (7), a plurality of connecting plates (12) are symmetrically slid on the surface of the rotating roller (7) on the feeding end, the side of the connecting plate (12) close to each other is provided with a limiting plate (121), the limiting plate (121) is used for limiting the two sides of the raw material plate, a horizontal rod (16) is vertically slid through two slide rods (13) on one end of the surface of the connecting plate (12) close to the lower die holder (3), the horizontal rod (16) is rotatably installed with a pressing roller (17) on the inside, the pressing roller (17) is placed above the raw material plate, and the two pressing rollers (17) are respectively pressed on the two sides of the raw material plate.

2. The prepreg die cutting apparatus according to claim 1, wherein: The workbench (1) upper surface is provided with a frame (2), the top center of the frame (2) is fixed with a cylinder (4), the output end of the cylinder (4) is provided with a lifting plate (5), the lifting plate (5) vertically slides in the inside of the frame (2), the bottom of the lifting plate (5) is uniformly provided with a shaped cutter (6), the workbench (1) surface is provided with a lower die holder (3), the lower die holder (3) is placed directly below the lifting plate (5), the surface of the lower die holder (3) is provided with a die groove (31) matched with the shaped cutter (6), the workbench (1) surface is uniformly provided with a plurality of mounting blocks (103), each group of mounting blocks (103) is provided with two symmetrically, two mounting blocks (103) are rotatably installed with a rotating roller (7), the raw material plate is placed on the surface of the rotating roller (7), a plurality of connecting plates (12) are symmetrically slid on the surface of the rotating roller (7) on the feeding end, the side of the connecting plate (12) close to each other is provided with a limiting plate (121), the limiting plate (121) is used for limiting the two sides of the raw material plate, a horizontal rod (16) is vertically slid through two slide rods (13) on one end of the surface of the connecting plate (12) close to the lower die holder (3), the horizontal rod (16) is rotatably installed with a pressing roller (17) on the inside, the pressing roller (17) is placed above the raw material plate, and the two pressing rollers (17) are respectively pressed on the two sides of the raw material plate.

3. The prepreg die cutting apparatus according to claim 2, wherein: The surface of the screw rod (8) is screwed with a control block (9), the bottom of the control block (9) is in contact with the upper surface of the workbench (1), and the two sides of the control block (9) are symmetrically hinged with connecting rods (10).

4. The prepreg die cutting apparatus according to claim 3, wherein: The surface of the slide groove (102) is symmetrically slidably installed with a sliding block (11), one end of the connecting rod (10) away from the control block (9) is respectively hinged on the two sliding blocks (11), and the top of the sliding block (11) is installed below the center of the connecting plate (12).

5. The prepreg die cutting apparatus according to claim 1, wherein: The bottom of the two slide rods (13) is screwed with a nut (14), and the nut (14) is placed below the connecting plate (12).

6. The prepreg die cutting apparatus according to claim 5, wherein: The surface of the slide rod (13) is provided with a spring (15), and the spring (15) is arranged between the connecting plate (12) and the nut (14).

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