A multi-layer composite thermoforming pressure compensation device

Abstract

The utility model belongs to multilayer composite material processing equipment technical field, concretely relates to a kind of multilayer composite material hot press forming pressure compensation device, including workbench, the top of workbench is provided with four guide pillars, and the top between multiple guide pillars is fixed with first mounting plate, the top of first mounting plate is provided with first hydraulic cylinder, and the output shaft of first hydraulic cylinder extends to the second mounting plate below being provided with, the four corners of second mounting plate are slidably connected with guide pillar, and the top of second mounting plate has multiple second hydraulic cylinders at equidistance array, the output shaft of second hydraulic cylinder extends to the second mounting plate below being provided with universal ball head connecting piece, and the bottom between multiple universal ball head connecting pieces is provided with detachable upper pressing plate;The utility model can realize the accurate control and compensation of pressure and temperature, and upper pressing plate is easy to dismount and install, and is suitable for promotion and use.

Description

Technical Field

[0001] This utility model belongs to the technical field of multilayer composite material processing equipment, specifically relating to a pressure compensation device for hot pressing of multilayer composite materials. Background Technology

[0002] Multilayer composite materials have been widely used in high-end fields such as aerospace, automobile manufacturing, and rail transportation due to their excellent comprehensive performance. Hot pressing of multilayer composite materials is a key process that uses high temperature and high pressure to tightly bond and solidify multilayer materials (such as prepreg, metal sheet, core material, etc.). Its core is to ensure that the pressure is uniformly transmitted in the multilayer structure and stably maintain the design value.

[0003] Problems with existing technology: The pressurization system is mostly a rigid pressure plate driven by a single cylinder. Due to the complex internal structure of multi-layer composite materials, the "edge effect" and "stress concentration" are very likely to occur when the whole is pressurized, resulting in excessive or insufficient local pressure on the material, which in turn causes molding defects such as delamination and wrinkles. In addition, the upper pressure plate, as the core pressure-bearing component, is often fixedly connected to the pressurization mechanism. When it is necessary to adapt to different specifications of composite materials or replace worn parts, the disassembly process is cumbersome and consumes a lot of time, which significantly reduces the changeover efficiency of the production line. Utility Model Content

[0004] The purpose of this invention is to provide a pressure compensation device for hot pressing of multi-layer composite materials, which can achieve precise control and compensation of pressure and temperature, and the upper pressure plate is easy to disassemble and install, making it suitable for widespread use.

[0005] The specific technical solution adopted by this utility model is as follows: A pressure compensation device for hot pressing of multilayer composite materials includes a worktable. Four guide pillars are arranged on the top of the worktable. A first mounting plate is fixed between the tops of the guide pillars. A first hydraulic cylinder is arranged on the top of the first mounting plate. The output shaft of the first hydraulic cylinder extends to a second mounting plate below the first mounting plate. The four corners of the second mounting plate are slidably connected to the guide pillars. A plurality of second hydraulic cylinders are equidistantly arranged on the top of the second mounting plate. Universal ball joint connectors are arranged below the second mounting plate from the output shafts of the second hydraulic cylinders. A detachable upper pressure plate is arranged between the bottoms of the plurality of universal ball joint connectors. The plurality of second hydraulic cylinders divide the upper pressure plate into multiple pressurization zones. A plurality of heating plates are equidistantly arranged on the bottom of the upper pressure plate to divide the upper pressure plate into multiple heating zones.

[0006] The bottom of the universal ball joint connector is provided with a plug rod, and the outer wall of the plug rod is provided with an annular groove. The top of the upper pressure plate is provided with multiple plug grooves that cooperate with the plug rod. Two movable plates are slidably installed on the top of the upper pressure plate and between two plug grooves. A first locking rod that cooperates with the annular groove is fixed between one side of the two movable plates. An L-shaped locking rod that cooperates with the annular groove is slidably installed on the top of the upper pressure plate and on the side opposite to the first locking rod.

[0007] The moving plate and the L-shaped lever are each provided with a toothed plate on their opposite sides, and a gear that meshes with the toothed plate is provided on the top of the upper pressure plate and between the two toothed plates.

[0008] A mounting base is fixed on the top of the upper pressure plate and between the movable plates. A double-ended lead screw is rotatably mounted through one side of the mounting base. Movable blocks are threaded onto the outer wall of the double-ended lead screw and on both sides of the mounting base. Two connecting rods that are sequentially connected to the two movable plates on the same side are rotatably mounted on the outer wall of the movable blocks.

[0009] The side of the locking rod and the L-shaped locking rod that mates with the annular locking groove is chamfered.

[0010] The top of the upper pressure plate is provided with a protective cover to protect the first locking rod and the L-shaped locking rod.

[0011] The technical effects achieved by this utility model are as follows: The second hydraulic cylinder in this invention divides the upper pressure plate into multiple pressurization zones. With the help of a pressure sensor, it can achieve independent pressure detection and compensation for each pressurization zone, ensuring uniform pressure on all parts of the multilayer composite material and improving the product molding quality. Multiple heating plates are set at the bottom of the upper pressure plate to form multiple heating zones. Combined with a temperature sensor, the temperature of each heating zone can be precisely controlled and adjusted to meet the heating needs of different areas and further improve the hot pressing molding effect.

[0012] The upper pressure plate and the universal ball joint connector of this utility model adopt a detachable connection method. Through the cooperation of structures such as double-ended lead screw, moving block, connecting rod, moving plate, gear, and toothed plate 15, the upper pressure plate can be quickly disassembled and installed, which is convenient to operate and improves the versatility of the equipment and production efficiency. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a bottom view schematic diagram of the upper pressure plate structure of this utility model; Figure 3 This is a bottom view schematic diagram of the upper pressure plate structure of this utility model; Figure 4 This is a schematic diagram of the connection structure between the first locking rod and the L-shaped locking rod of this utility model; Figure 5 This is a schematic diagram of the plug-in rod and annular slot structure of this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 1. Workbench; 2. Guide column; 3. First mounting plate; 4. First hydraulic cylinder; 5. Second mounting plate; 6. Second hydraulic cylinder; 7. Universal ball joint connector; 8. Insert rod; 9. Annular groove; 10. Upper pressure plate; 11. Insert groove; 12. Moving plate; 13. First locking rod; 14. L-shaped locking rod; 15. Gear plate; 16. Gear; 17. Connecting rod; 18. Mounting base; 19. Moving block; 20. Double-ended lead screw; 21. Heating plate; 22. Protective cover; 23. Lower pressure plate. Detailed Implementation

[0015] 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.

[0016] like Figures 1-5 As shown, a multi-layer composite material hot pressing molding pressure compensation device includes a worktable 1. Four guide pillars 2 are arranged on the top of the worktable 1. A first mounting plate 3 is fixed between the tops of the guide pillars 2. A first hydraulic cylinder 4 is arranged on the top of the first mounting plate 3. The output shaft of the first hydraulic cylinder 4 extends to a second mounting plate 5 located below the first mounting plate 3. The four corners of the second mounting plate 5 are slidably connected to the guide pillars 2. Multiple second hydraulic cylinders 6 are equidistantly arranged on the top of the second mounting plate 5. Universal ball joint connectors 7 extend from the output shaft of the second hydraulic cylinders 6 to a point below the second mounting plate 5. A detachable upper pressure plate 10 is provided between the bottoms of the connectors 7. Pressure sensors are provided at the connection points between the upper pressure plate 10 and each of the second hydraulic cylinders 6 to detect the pressure value of each pressurization zone. A lower pressure plate 23 that cooperates with the upper pressure plate 10 is slidably installed on the top of the worktable 1. Multiple second hydraulic cylinders 6 divide the upper pressure plate 10 into multiple pressurization zones. Multiple heating plates 21 are equidistantly arrayed at the bottom of the upper pressure plate 10 to divide the upper pressure plate 10 into multiple heating zones. Temperature sensors are provided on the upper pressure plate 10 at positions corresponding to each heating plate 21 to detect the temperature value of each heating zone.

[0017] According to the above structure, the second hydraulic cylinder 6 divides the upper pressure plate 10 into multiple pressure zones. With the help of pressure sensors, it can realize independent pressure detection and compensation for each pressure zone, ensuring that the pressure on each part of the multilayer composite material is uniform and improving the product molding quality. Multiple heating plates 21 are set at the bottom of the upper pressure plate 10 to form multiple heating zones. Combined with temperature sensors, the temperature of each heating zone can be precisely controlled and adjusted to meet the heating needs of different areas and further improve the hot pressing molding effect.

[0018] like Figures 3-4 As shown, the bottom of the universal ball joint connector 7 is provided with a plug rod 8, the outer wall of the plug rod 8 is provided with an annular groove 9, the top of the upper pressure plate 10 is provided with a plurality of plug grooves 11 that cooperate with the plug rod 8, the top of the upper pressure plate 10 is provided with two movable plates 12 that are slidably installed between the two plug grooves 11, the first locking rod 13 that cooperates with the annular groove 9 is fixed between one side of the two movable plates 12, and the top of the upper pressure plate 10 and the side opposite to the first locking rod 13 is slidably installed with an L-shaped locking rod 14 that cooperates with the annular groove 9; A toothed plate 15 is provided on the opposite side of the movable plate 12 and the L-shaped locking rod 14. A gear 16 that meshes with the toothed plate 15 is provided on the top of the upper pressure plate 10 and between the two toothed plates 15. A mounting base 18 is fixed on the top of the upper pressure plate 10 and between the movable plates 12. A double-ended lead screw 20 is rotatably mounted through one side of the mounting base 18. A movable block 19 is threadedly connected to the outer wall of the double-ended lead screw 20 and on both sides of the mounting base 18. Two connecting rods 17 that are sequentially connected to the two movable plates 12 on the same side are rotatably mounted on the outer wall of the movable block 19. A chamfer is provided on the side of the first locking rod 13 and the L-shaped locking rod 14 that mates with the annular locking groove 9.

[0019] According to the above structure, when replacing the upper pressure plate 10, rotating the double-ended lead screw 20 causes the two moving blocks 19 to move away from each other. The moving blocks 19 drive the moving plate 12 to move via the connecting rod 17. The toothed plate 15 on the moving plate 12 drives the gear 16 to rotate, and the gear 16 drives the toothed plate 15 on the other side to move, thereby causing the L-shaped locking rod 14 to move away from the insertion rod 8. At the same time, the moving plate 12 drives the first locking rod 13 to move away from the insertion rod 8, causing the first locking rod 13 and the L-shaped locking rod 14 to disengage from the annular groove 9. At this time, the upper pressure plate 10 can be removed. The pressure plate 10 is removed from the universal ball joint connector 7. When installing the new upper pressure plate 10, align the insertion slot 11 of the upper pressure plate 10 with the insertion rod 8 and insert it. Rotate the double-ended screw 20 in the opposite direction to make the first locking rod 13 and the L-shaped locking rod 14 engage in the annular groove 9, thus completing the installation of the upper pressure plate 10. This enables quick disassembly and installation of the upper pressure plate 10, making operation convenient and improving the versatility and production efficiency of the equipment. The chamfers on the first locking rod 13 and the L-shaped locking rod 14 can pre-tighten the insertion rod 8 when they cooperate with the annular groove 9, improving the stability and firmness of the lower pressure plate 23.

[0020] like Figures 1-2 As shown, the top of the upper pressure plate 10 is provided with a protective cover 22 for protecting the first locking rod 13 and the L-shaped locking rod 14.

[0021] According to the above structure, the protective cover 22 can effectively isolate external dust and debris from the corrosion of key connecting components such as the first clamp 13 and the L-shaped clamp 14, slow down the aging of components, extend the service life of the equipment, and reduce maintenance costs.

[0022] The working principle of this utility model is as follows: When it is necessary to hot press the multi-layer composite material, the composite material is placed on the lower pressure plate 23, and the lower pressure plate 23 is slid to move it directly below the upper pressure plate 10; the first hydraulic cylinder 4 is activated, and the first hydraulic cylinder 4 drives the second mounting plate 5 to move downward along the guide post 2, thereby driving the upper pressure plate 10 to move downward, so that the upper pressure plate 10 and the lower pressure plate 23 cooperate to initially pressurize the composite material; During the pressurization process, multiple second hydraulic cylinders 6 divide the upper pressure plate 10 into multiple pressurization zones, and pressure sensors detect the pressure values ​​of each pressurization zone in real time. When the pressure value of a certain pressurization zone does not meet the requirements, the corresponding second hydraulic cylinder 6 can be independently extended and retracted, and the pressure of the corresponding area of ​​the upper pressure plate 10 is compensated through the universal ball joint connector 7 to ensure that the pressure of each pressurization zone is uniform. At the same time, multiple heating plates 21 at the bottom of the upper pressure plate 10 divide the upper pressure plate 10 into multiple heating zones, and temperature sensors detect the temperature values ​​of each heating zone. The temperature of the heating plates 21 in different heating zones can be adjusted as needed to ensure that the temperature of each heating zone meets the processing requirements. When the upper pressure plate 10 needs to be replaced, rotate the double-ended lead screw 20. The double-ended lead screw 20 drives the two moving blocks 19 to move away from each other. The moving blocks 19 drive the moving plate 12 to move through the connecting rod 17. The toothed plate 15 on the moving plate 12 drives the gear 16 to rotate. The gear 16 then drives the toothed plate 15 on the other side to move, thereby causing the L-shaped locking rod 14 to move away from the plug-in rod 8. At the same time, the moving plate 12 drives the first locking rod 13 to move away from the plug-in rod 8, so that the first locking rod 13 and the L-shaped locking rod 14 are disengaged from the annular groove 9. At this time, the upper pressure plate 10 can be removed from the universal ball joint connector 7. When installing the new upper pressure plate 10, align the plug-in groove 11 of the upper pressure plate 10 with the plug-in rod 8 and insert it. Rotate the double-ended lead screw 20 in the opposite direction so that the first locking rod 13 and the L-shaped locking rod 14 are engaged in the annular groove 9, thus completing the installation of the upper pressure plate 10.

[0023] 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 pressure compensation device for hot pressing of multilayer composite materials, comprising a worktable (1), characterized in that: The workbench (1) is provided with four guide pillars (2) on its top. A first mounting plate (3) is fixed between the tops of the multiple guide pillars (2). A first hydraulic cylinder (4) is provided on the top of the first mounting plate (3). The output shaft of the first hydraulic cylinder (4) extends to the bottom of the first mounting plate (3) and a second mounting plate (5) is provided. The four corners of the second mounting plate (5) are slidably connected to the guide pillars (2). The second mounting plate (5) is characterized by having multiple second hydraulic cylinders (6) arranged equidistantly on its top. The output shaft of the second hydraulic cylinder (6) extends to the bottom of the second mounting plate (5) and a universal ball joint connector (7) is provided. A detachable upper pressure plate (10) is provided between the bottoms of the multiple universal ball joint connectors (7). The multiple second hydraulic cylinders (6) divide the upper pressure plate (10) into multiple pressurization zones. The upper pressure plate (10) is divided into multiple heating zones by multiple heating plates (21) arranged equidistantly on its bottom.

2. The multilayer composite material hot pressing pressure compensation device according to claim 1, characterized in that: The bottom of the universal ball joint connector (7) is provided with a plug rod (8), and the outer wall of the plug rod (8) is provided with an annular groove (9). The top of the upper pressure plate (10) is provided with a plurality of plug grooves (11) that cooperate with the plug rod (8). Two movable plates (12) are slidably installed on the top of the upper pressure plate (10) and between the two plug grooves (11). A first locking rod (13) that cooperates with the annular groove (9) is fixed between one side of the two movable plates (12). An L-shaped locking rod (14) that cooperates with the annular groove (9) is slidably installed on the top of the upper pressure plate (10) and on the side opposite to the first locking rod (13).

3. The multilayer composite material hot pressing pressure compensation device according to claim 2, characterized in that: The moving plate (12) and the L-shaped lever (14) are each provided with a toothed plate (15) on opposite sides. The upper pressure plate (10) is provided with a gear (16) that meshes with the toothed plate (15) at the top and between the two toothed plates (15).

4. The multilayer composite material hot pressing molding pressure compensation device according to claim 1, characterized in that: A mounting base (18) is fixed on the top of the upper pressure plate (10) and between the moving plates (12). A double-ended screw (20) is rotatably mounted through one side of the mounting base (18). Moving blocks (19) are threadedly connected to the outer wall of the double-ended screw (20) and on both sides of the mounting base (18). Two connecting rods (17) that are sequentially connected to the two moving plates (12) on the same side are rotatably mounted on the outer wall of the moving blocks (19).

5. The multilayer composite material hot pressing pressure compensation device according to claim 2, characterized in that: The first locking rod (13) and the L-shaped locking rod (14) have a chamfer on the side that mates with the annular locking groove (9).

6. The pressure compensation device for hot pressing of multilayer composite materials according to claim 1, characterized in that: The top of the upper pressure plate (10) is provided with a protective cover (22) for protecting the first locking rod (13) and the L-shaped locking rod (14).

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