A servo hydraulic press for hot forming composite products

Abstract

The present invention discloses a composite material product hot forming servo hydraulic press, which belongs to the technical field of hydraulic presses. The composite material product hot forming servo hydraulic press comprises a machine base, a hydraulic component, a heating component, a fixing plate, a female mold, a female mold assembly block, a driving component, a connecting plate, a mounting plate, a male mold, and a cleaning component. In the present invention, when performing press forming, the side walls of the four female mold assembly blocks are against the side walls of the female mold, so that a forming cavity is formed between the four female mold assembly blocks and the female mold, and then the male mold is driven downward by the hydraulic component so that the composite material semi-finished product placed in the forming cavity can be press formed. After the press forming is completed, the female mold assembly block is driven by the driving component to move in a direction away from the female mold and move upward at the same time, so that the cleaning component can scrape off the particles that fall off the side wall of the female mold assembly block due to thermal friction and the oxide layer during the process of resetting with the male mold upward.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic presses, and in particular relates to a servo hydraulic press for hot forming composite material products. Background Art

[0002] A hydraulic press is a machine that uses the static pressure of liquid to work. It is mainly used to transfer energy to process various materials, such as metal, plastic, rubber, wood and powder. It usually consists of three parts: the main machine, the power system and the hydraulic control system. The classification of hydraulic presses includes valve hydraulic presses, liquid hydraulic presses and engineering hydraulic presses. The structure of the hydraulic press can be distinguished according to the direction and type of force. According to the direction of force, hydraulic presses are divided into vertical and horizontal types, of which vertical hydraulic presses are more common, while hydraulic presses for extrusion are mostly horizontal. According to the structural type, hydraulic presses are of types such as double-column, four-column, eight-column, welded frame and multi-layer steel belt winding frame. Medium and small vertical hydraulic presses may also use C-frame type. Servo hydraulic press is a hydraulic press that uses a servo motor to drive the main transmission oil pump. It controls the hydraulic press slide by reducing the control valve circuit. This hydraulic press is known for its energy-saving and high-efficiency characteristics, and is suitable for stamping, die forging, press fitting, straightening and other processes. Compared with ordinary hydraulic presses, servo hydraulic presses have several significant advantages. First, it does not contain proportional servo valves or proportional pump links, so it is more energy-efficient. According to different processing technology and production rhythm, servo-driven hydraulic press can save 30% to 70% of electricity compared with traditional hydraulic press. Secondly, due to the use of internal gear pump or high-performance vane pump, the noise of servo-driven hydraulic press is lower, 5dB to 10dB lower than that of traditional hydraulic press. In addition, servo-driven hydraulic press generates less heat, and the heat generated by the hydraulic system is generally 10% to 30% of that of traditional hydraulic press, so it is usually not necessary to set up a hydraulic oil cooling system. Due to these advantages of servo-driven hydraulic press, it has gradually replaced most of the traditional ordinary hydraulic presses and has a wide range of application prospects in the market.

[0003] Thermoforming is a plastic processing method that processes thermoplastic plastic sheets into various products. This process involves heating the plastic sheet to a softened state, and then forcing it to fit the mold surface under external force to obtain a shape similar to the mold surface. After cooling and shaping, it is trimmed to form the product. Thermoformed products are very common in the market, such as cups, plates, food trays, toys, helmets, as well as automotive parts, architectural decorative parts, chemical equipment, etc. There are many methods of thermoforming, which are basically based on vacuum, air pressure or mechanical pressure, and are combined or improved. For example, vacuum forming uses vacuum to make the heat-softened sheet fit closely to the mold surface and form it, which is suitable for products with simple shapes. Air pressure thermoforming uses compressed air or steam pressure and is suitable for products with more complex shapes. Mold thermoforming places the heat-softened sheet between the matching female and male molds and forms it with the help of mechanical pressure, which is suitable for products with more complex shapes.

[0004] During the hot forming process of composite materials, the semi-finished product made of the composite material is placed in the female mold of the servo hydraulic press, and then the male mold of the servo hydraulic press moves downward to press the semi-finished product in the female mold. After pressing and forming, the semi-finished product will resist the strong thermal friction with the inner wall of the female mold under high temperature during the pressing process, and the detached oxide layer particles will remain in the female mold. After long-term accumulation, it will make it difficult to clean the inner wall of the female mold, which will affect the surface quality of the product after forming during the subsequent hot pressing of the product. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a servo hydraulic press for hot forming composite products.

[0006] The technical solution adopted to solve the above technical problems is: a composite material product thermoforming servo hydraulic press, including a servo hydraulic press base and a hydraulic assembly installed above the base, the base is also provided with a heating assembly, and also includes:

[0007] A fixed plate installed on the top of the machine base, with a female mold fixedly connected to the top of the fixed plate;

[0008] Four female mold assembly blocks are movably connected to the top surface of the fixed plate, the four female mold assembly blocks are distributed on four sides of the female mold, and when the outer walls of the four female mold assembly blocks abut against the side walls of the female mold, a molding cavity is formed between the top surface of the female mold and the side walls of the four female mold assembly blocks;

[0009] A driving assembly mounted on the fixed plate, the driving assembly being used to drive the female mold assembly block to move horizontally in a direction away from the female mold, and simultaneously drive the female mold assembly block to move upward;

[0010] A connecting plate installed at the output end of the hydraulic assembly, a mounting plate fixedly connected to the bottom of the connecting plate, and a male mold fixedly connected to the bottom of the mounting plate;

[0011] The cleaning components connected to the four side walls of the mounting plate are rotatably connected respectively.

[0012] Through the above technical scheme, when performing press molding, the side walls of the four female mold assembly blocks are abutted against the side walls of the female mold, thereby forming a molding cavity between the four female mold assembly blocks and the female mold, and then the hydraulic component drives the male mold to move downward, so that the composite material semi-finished product placed in the molding cavity can be press molded. After the press molding is completed, the female mold assembly is driven by the driving component to move away from the female mold and move upward at the same time, so that the cleaning component can scrape off the particles that fall off the side wall of the female mold assembly block due to thermal friction and the oxide layer during the process of resetting with the male mold upward, and because the female mold assembly block moves upward to a certain position, the cleaning component can scrape off the particles on the side wall of the female mold assembly block to the greatest extent, thereby improving the scraping effect.

[0013] Furthermore, the heating component includes a lifting seat connected to the output end of the hydraulic component, the downward side of the lifting seat is fixedly connected to a first heater, the connecting plate is installed on the bottom surface of the first heater, the top surface of the base is connected to a second heater, and the fixing plate is fixedly connected to the top surface of the second heater.

[0014] Through the above technical solution, the first heater heats the male mold, and the second heater heats the female mold, so that the composite semi-finished product can be heated during the entire molding and pressing process, thereby improving the molding efficiency.

[0015] Furthermore, the driving assembly includes a support plate connected to the top surface of the fixed plate, a hydraulic cylinder is horizontally installed on the support plate, the end of the telescopic rod of the hydraulic cylinder is vertically slidably connected to the side wall of the female mold assembly block, the side wall of the female mold is horizontally fixed with an ear block, the outer wall of the female mold assembly block is provided with a clearance groove for the ear block to pass freely, a fixing pin is passed through the end of the ear block away from the female mold, and the inner side wall of the clearance groove is provided with an oblique groove for the fixing pin to be inserted, the length direction of the oblique groove forms an angle with the vertical direction, and the fixing pin slides freely in the oblique groove.

[0016] Through the above technical scheme, the hydraulic cylinder drives the female mold assembly block to move horizontally, and makes the fixing pin move in the avoidance groove along the length direction of the inclined groove, so that the movement trajectory of the female mold assembly block is an oblique line, so that the female mold assembly block can produce both horizontal and vertical movements, and the structure is simple.

[0017] Furthermore, a connecting head is fixedly connected to the end of the telescopic rod of the hydraulic cylinder, a small-diameter section is provided at the periphery of the connecting head, and a stop groove for the connecting head to engage is provided on the side wall of the female mold assembly block. The cross-section of the stop groove is T-shaped and is positively locked with the connecting head.

[0018] Through the above technical solution, when the telescopic rod of the hydraulic cylinder performs telescopic movement, the connecting head can slide vertically in the stop slide groove, thereby enabling the female mold assembly block to move vertically while moving horizontally.

[0019] Furthermore, both ends of the female mold assembly block in the length direction are inclined, so that after the side walls of the female mold assembly block abut against the outer wall of the female mold, the four female mold assembly blocks are spliced ​​into a U-shaped structure.

[0020] Through the above technical solution, after the side walls of the four female mold assembly blocks abut against the outer wall of the female mold, no gap will be generated between the abutting surfaces of two adjacent female mold assembly blocks.

[0021] Furthermore, the hydraulic cylinders are arranged in four groups, each group having two hydraulic cylinders, the four groups of hydraulic cylinders correspond to the four female mold assembly blocks respectively, and the two hydraulic cylinders in each group correspond to the two ends of the female mold assembly block in the length direction respectively.

[0022] Through the above technical solution, each female mold assembly block is driven to move by two hydraulic cylinders, so that the force at both ends of the length direction of the female mold assembly block is more balanced, avoiding the female mold assembly block from tilting during movement, which in turn causes greater scratches and wear on the ear blocks and the inner walls of the air avoidance grooves, and makes the movement process of the female mold assembly block more stable.

[0023] Furthermore, the cleaning assembly includes a rotating block rotatably connected to a receiving groove opened in the side wall of the mounting plate, a strip scraper is fixedly connected to the outer wall of the rotating block, and an elastic reset unit is provided on the mounting plate. The elastic reset unit is used to drive the strip scraper to rotate around the rotating fulcrum of the rotating block on the mounting plate to a horizontal state.

[0024] Through the above technical scheme, when the press forming operation is carried out, the strip scraper will be squeezed by the top surface of the female mold assembly block, causing the rotating block to rotate upward and the elastic reset unit to accumulate elastic potential energy. When the press forming is completed, when the four female mold assembly blocks move away from the female mold, the elastic potential energy of the elastic reset unit is released, thereby driving the rotating block to rotate in the opposite direction and causing the strip scraper to rotate to a horizontal state. At the same time, the outer wall of the strip scraper away from the mounting plate abuts against the outer wall of the female mold assembly block toward the female mold, and then in the process of resetting as the male mold moves upward, the side wall of the strip scraper can scrape off the particles on the side wall of the female mold assembly block.

[0025] Furthermore, a collecting groove is provided on the upper surface of the strip scraper.

[0026] Through the above technical solution, after the strip scraper scrapes off the particles on the side wall of the female mold assembly block, the particles will fall into the collection tank for collection, which makes it convenient for subsequent workers to blow out the particles by blowing the collection tank.

[0027] Furthermore, the elastic reset unit includes a fixed shaft fixedly connected to the inner side wall of the accommodating groove, the outer wall of the rotating block is provided with a mounting hole for the fixed shaft to pass freely, the outer wall of the rotating block is provided with a mounting groove, a spiral spring is installed in the mounting groove, the spiral spring is wrapped around the periphery of the fixed shaft, and the two ends of the spiral spring are respectively fixed to the inner wall of the mounting groove and the periphery of the fixed shaft.

[0028] Through the above technical solution, in the initial state, the scroll spring will drive the rotating block to rotate downward, so that the strip scraper rotates to a horizontal state.

[0029] Furthermore, a demolding assembly is provided in the female mold, and the demolding assembly includes a floating column vertically penetrated through the top surface of the female mold, the floating column slides freely in the female mold, and a demolding plate is fixedly connected to the upper end of the floating column, and a storage cavity for the demolding plate to be engaged is provided on the top surface of the female mold, a support is fixedly connected to the top of the fixed plate, a drive shaft is horizontally rotatably connected to the support, a through groove is provided at the periphery of the floating column for the drive shaft to pass freely, a protrusion is fixedly connected to the periphery of the drive shaft, the protrusion is provided in the through groove, and the drive shaft is driven to rotate by a rotating unit installed on the fixed plate.

[0030] Through the above technical solution, the driving shaft is driven to rotate by the rotating unit, so that the protrusion rotates in the through groove. When the protrusion hits the top wall in the through groove, it drives the floating column to move upward and drives the stripping plate to move upward, so that the stripping plate can lift the composite material product after compression molding, making it easier for workers to unload.

[0031] The beneficial effects of the present invention are as follows:

[0032] In the present invention, when performing compression molding, the side walls of the four female mold assembly blocks are against the side walls of the female mold, so that a molding cavity is surrounded by the four female mold assembly blocks and the female mold, and then the male mold is driven downward by the hydraulic component, so that the composite semi-finished product placed in the molding cavity can be compression molded. After the compression molding is completed, the female mold assembly is driven by the driving component to move in a direction away from the female mold and move upward at the same time, so that the cleaning component can scrape off the particles that fall off the side wall of the female mold assembly block due to thermal friction and the oxide layer during the process of resetting with the male mold upward, and because the female mold assembly block moves upward to a certain position, the cleaning component can scrape off the particles on the side wall of the female mold assembly block to the greatest extent, thereby improving the scraping effect;

[0033] In the present invention, when the pressing and forming operation is performed, the strip scraper will be squeezed by the top surface of the female mold assembly block, so that the rotating block rotates upward and the elastic reset unit accumulates elastic potential energy. When the pressing and forming is completed, when the four female mold assembly blocks move in a direction away from the female mold, the elastic potential energy of the elastic reset unit is released, thereby driving the rotating block to rotate in the opposite direction and rotating the strip scraper to a horizontal state. At the same time, the outer wall of the strip scraper away from the mounting plate abuts against the outer wall of the female mold assembly block toward the female mold, and then in the process of resetting with the upward movement of the male mold, the side wall of the strip scraper can scrape off the particles on the side wall of the female mold assembly block.

[0034] In the present invention, the driving shaft is rotated by the rotating unit, so that the protrusion rotates in the through groove. When the protrusion hits the top wall in the through groove, the floating column is driven to move upward and the stripping plate is driven to move upward, so that the stripping plate can lift the composite material product after compression molding, making it easier for workers to unload. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of a servo hydraulic press for hot forming composite products in the present invention;

[0036] Figure 2 yes Figure 1 A schematic diagram of the structure from the first perspective;

[0037] Figure 3 yes Figure 1 A schematic diagram of the structure of the second perspective;

[0038] Figure 4 It is a schematic diagram of the positional relationship of the fixing plate, the female mold, and the mounting plate after assembly in the present invention;

[0039] Figure 5 yes Figure 4 A schematic diagram of the structure from another perspective;

[0040] Figure 6 It is a schematic diagram of the positional relationship of the mounting plate, the connecting plate and the male mold after assembly in the present invention;

[0041] Figure 7 yes Figure 6 Schematic diagram of the explosion decomposition of the structure in the middle;

[0042] Figure 8 yes Figure 7 A magnified schematic diagram of the local structure at point A;

[0043] Fig. 9 It is a schematic diagram of the positional relationship of the fixed plate, the female mold and the four female mold assembly blocks after assembly in the present invention;

[0044] Fig.10 yes Fig. 9Schematic diagram of the explosion decomposition of the structure in the middle;

[0045] Fig.11 It is a schematic diagram of the positional relationship between the female mold and the female mold assembly block after assembly in the present invention;

[0046] Fig.12 yes Fig.11 A magnified schematic diagram of the local structure at B in the middle;

[0047] Fig.13 It is a schematic diagram of the positional relationship among the floating column, the stripping plate and the driving shaft after being assembled in the present invention.

[0048] Figure numerals: 1. base; 2. hydraulic cylinder; 3. lifting seat; 4. hydraulic assembly; 5. female mold; 6. female mold assembly block; 7. fixed plate; 8. second heater; 9. first heater; 10. male mold; 11. molding cavity; 12. mounting plate; 13. strip scraper; 14. connecting plate; 15. collecting trough; 16. stripping plate; 17. connecting head; 18. air avoidance groove; 19. ear block; 20. rotating block; 21. volute spring; 22. fixed shaft; 23. mounting groove; 24. reduction motor; 25. stop slide groove; 26. storage cavity; 27. fixing pin; 28. floating column; 29. ​​driving shaft; 30. inclined groove; 31. protrusion; 32. through groove. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] like Figure 1-Figure 13As shown, the present embodiment provides a servo hydraulic press for hot forming composite products, including a machine base 1 of a servo hydraulic press, guide columns are vertically connected to the top of the machine base 1, a hydraulic component 4 is commonly installed on the upper ends of the four guide columns, and the hydraulic component 4 is controlled by the electric control cabinet of the servo hydraulic press. In addition, a lifting seat 3 is also commonly mounted on the upper sides of the four guide columns, and the top of the lifting seat 3 is fixedly connected to the output end of the hydraulic component 4, so that the hydraulic component 4 can drive the lifting seat 3 to move vertically. In addition, a first heater 9 is installed on the downward side of the lifting seat 3, and a second heater 8 is installed on the top of the machine base 1. The first heater 9 and the second heater 8 can be set as oil heaters commonly used in the prior art, that is, heating is achieved by using a copper pipe to pass heat transfer oil. A connecting plate 14 is installed at the bottom of the first heater 9, and a mounting plate 12 is welded to the bottom of the connecting plate 14. A male mold 10 is fixedly connected to the bottom of the mounting plate 12. A fixing plate 7 is installed on the top of the heat device 8, and a female mold 5 is fixedly connected to the top surface of the fixing plate 7. In addition, four female mold assembly blocks 6 are arranged in an array on the top surface of the fixing plate 7 with the center line of the female mold 5 as the axis, and the four female mold assembly blocks 6 are distributed on the four sides of the female mold 5. When the outer walls of the four female mold assembly blocks 6 abut against the side walls of the female mold 5, a molding cavity 11 is surrounded between the top surface of the female mold 5 and the side walls of the four female mold assembly blocks 6. The two ends of the female mold assembly block 6 in the length direction are inclined, so that after the side walls of the female mold assembly block 6 abut against the outer walls of the female mold 5, the four female mold assembly blocks 6 are spliced ​​into a U-shaped structure. In this way, after the side walls of the four female mold assembly blocks 6 abut against the outer walls of the female mold 5, no gap will be generated between the abutting surfaces of two adjacent female mold assembly blocks 6, and the contour of the male mold 10 is adapted to the molding cavity 11. It should be noted that the specific contours of the male mold 10 and the molding cavity 11 are customized according to the actual product. This belongs to the technical common sense of those skilled in the art and will not be repeated here.

[0051] A floating column 28 is vertically penetrated through the top surface of the female mold 5. The floating column 28 slides freely in the female mold 5, and the upper end of the floating column 28 is fixedly connected to the stripper plate 16. A receiving cavity 26 for the stripper plate 16 to engage is provided on the top surface of the female mold 5. After the stripper plate 16 is engaged in the receiving cavity 26, there is no gap between the side wall of the stripper plate 16 and the side wall of the receiving cavity 26, and the top surface of the stripper plate 16 is flush with the top surface of the female mold 5. A support is fixedly connected to the top of the fixed plate 7, and a drive shaft 29 is horizontally rotatably connected to the support. A through groove 32 for the drive shaft 29 to pass freely is provided on the periphery of the floating column 28. The longitudinal section of the through groove 32 is rectangular. A convex block 31 is fixedly connected to the periphery of the drive shaft 29. The convex block 31 is arranged in the through groove 32. The shape of the convex block 31 is similar to a cam structure. The protrusion 31 and the through slot 32 form a cam mechanism. When the protruding portion of the protrusion 31 (or the farthest end from the driving shaft 29) abuts against the inner top wall of the through slot 32, the protrusion 31 will drive the floating column 28 to move upward. In addition, when the protruding portion of the protrusion 31 rotates to correspond to the lateral side wall of the through slot 32, the floating column 28 will move downward under the action of gravity, so that the stripping plate 16 moves downward and is engaged in the storage cavity 26. A motor seat is welded on the fixing plate 7, and a reduction motor 24 is installed on the motor seat. The output end of the reduction motor 24 is connected to the driving shaft 29, and then the reduction motor 24 drives the driving shaft 29 to rotate. In addition, a notch groove is provided on the female mold assembly block 6 for the driving shaft 29 to pass freely.

[0052] Four groups of support plates are installed on the top surface of the fixed plate 7, and a hydraulic cylinder 2 is horizontally installed on each support plate. The number of hydraulic cylinders 2 and support plates is set to eight, that is, the number of hydraulic cylinders 2 in each group is two, and the four support plates correspond to four female mold assembly blocks 6 respectively, and the two hydraulic cylinders 2 in each group correspond to the two ends of the same female mold assembly block 6 in the length direction. The end of the telescopic rod of the hydraulic cylinder 2 is fixedly connected with a connector 17, and the periphery of the connector 17 is provided with a small diameter section, so that the outline of the positive projection of the connector 17 is I-shaped, and the side wall of the female mold assembly block 6 is provided with a small diameter section. The stop slot 25 engaged with the connector 17 has a T-shaped cross section and is engaged with the connector 17. The small diameter section of the connector 17 is engaged with the raised portion of the stop slot 25 cross section, so that the connector 17 can rotate around its own axis in the stop slot 25. At the same time, the connector 17 can also move vertically in the stop slot 25. Each female mold assembly block 6 is driven by two hydraulic cylinders 2, so that the force at both ends of the length direction of the female mold assembly block 6 is more balanced, avoiding the female mold assembly block 6 During the movement, deflection occurs, which leads to greater scratching and wear of the ear block 19 and the inner wall of the air avoidance groove 18, and makes the movement process of the female mold assembly block 6 relatively stable. In addition, the female mold 5 has ear blocks 19 horizontally fixed at both ends of the side wall facing the female mold assembly block 6, and the ear blocks 19 extend horizontally in the direction away from the female mold 5. The outer wall of the female mold assembly block 6 is provided with an air avoidance groove 18 for the ear block 19 to pass freely. The width of the air avoidance groove 18 is adapted to the thickness of the ear block 19. The ear block 19 can slide vertically in the air avoidance groove 18. The ear block 1 A fixing pin 27 is fixedly penetrated at one end away from the female mold 5, and an inclined groove 30 for the fixing pin 27 to be inserted is provided on the inner side wall of the air-avoiding groove 18. The length direction of the inclined groove 30 forms an angle with the vertical direction, or the upper end of the inclined groove 30 in the length direction extends obliquely in the direction away from the female mold 5. In addition, the fixing pin 27 slides freely in the inclined groove 30. When the fixing pin 27 slides from the lower end of the inclined groove 30 in the length direction to the upper end of the inclined groove 30 in the length direction, the female mold assembly block 6 is driven to move upward, and the female mold assembly block 6 is also caused to move horizontally.

[0053] The four side walls of the mounting plate 12 are all provided with receiving grooves in the form of notches, and a fixed shaft 22 is horizontally fixedly connected to the side wall of the receiving groove, and a rotating block 20 is mounted on the fixed shaft 22. A mounting hole for the fixed shaft 22 to pass freely is provided on the outer wall of the rotating block 20, and the rotating block 20 can freely rotate around the axial direction of the fixed shaft 22. A strip scraper 13 is integrally fixedly connected to the outer wall of the rotating block 20, and the length direction of the strip scraper 13 is parallel to the length direction of the female mold assembly block 6. A mounting groove 23 is provided on the outer wall of the rotating block 20, and a volute spring 21 is installed in the mounting groove 23. The volute spring 21 is wrapped around the periphery of the fixed shaft 22, and the two ends of the volute spring 21 are respectively fixed to the inner wall of the mounting groove 23 and the periphery of the fixed shaft 22.

[0054] The working principle of this embodiment is as follows:

[0055] The composite semi-finished product is placed in the molding cavity 11, and then the electric control cabinet controls the first heater 9 and the second heater 8 to work, and heats the male mold 10 and the female mold 5 respectively. The electric control cabinet then controls the hydraulic assembly 4 to start, and the hydraulic assembly 4 drives the lifting seat 3 to move downward. When moving downward, the male mold 10 is synchronously driven to move downward, and the male mold 10 is engaged with the molding cavity 11, and then the composite semi-finished product in the molding cavity 11 is pressed and molded. When the male mold 10 moves downward, the downward side of the strip scraper 13 is resisted by the top surface of the female mold assembly block 6. The strip scraper 13 drives the rotating block 20 to rotate upward around the fixed axis 22, so that the inner wall of the mounting groove 23 drives the scroll spring 21 to contract. At this time, the scroll spring 21 presents a winding effect, so that the scroll spring 21 contracts and accumulates elastic potential energy. In addition, in this embodiment, the size of the male mold 10 is set to be larger than the size of the mounting plate 12, or the positive projection area of ​​the male mold 10 is larger than the positive projection area of ​​the mounting plate 12, so that when the male mold 10 moves downward, the strip scraper 13 will not interfere with the process of the male mold 10 being inserted into the molding cavity 11;

[0056] After the pressing and forming, the eight hydraulic cylinders 2 are first started, and the telescopic rods of the hydraulic cylinders 2 are slowly retracted, driving the connecting head 17 to slide in the stop slide groove 25, thereby driving the female mold assembly block 6 to move away from the female mold 5, so that the fixing pin 27 slides from the lower end of the inclined groove 30 in the length direction to the upper end of the inclined groove 30 in the length direction, thereby enabling the female mold assembly block 6 to move upward, and the position where the side wall of the female mold assembly block 6 is originally flush with the top surface of the female mold 5 will move upward and be higher than the horizontal plane where the mouth of the molding cavity 11 is located. At the same time, the female mold assembly block 6 will also produce a horizontal movement away from the female mold 5, so that the four female molds are The mold assembly blocks 6 move away from each other. When moving away from each other, the elastic potential energy of the spiral spring 21 is released, thereby driving the rotating block 20 to rotate in the opposite direction, that is, the rotating block 20 drives the strip scraper 13 to rotate downward around the axial direction of the fixed shaft 22, and the downward side of the strip scraper 13 is blocked by the top of the male mold 10, so that the strip scraper 13 will eventually rotate to a horizontal state, and the outer wall of the strip scraper 13 on the side away from the mounting plate 12 abuts against the outer wall of the female mold assembly block 6 on the side facing the female mold 5, and the abutting position is not higher than the original position of the side wall of the female mold assembly block 6 (when the female mold assembly block 6 is not away from the female mold 5) flush with the top surface of the female mold 5;

[0057] Then the electric control cabinet controls the hydraulic assembly 4 to reset, and the hydraulic assembly 4 will drive the lifting seat 3 to move upward and reset. When moving upward, the side wall of the strip scraper 13 will have a scraping effect on the side wall of the female mold assembly block 6, thereby being able to remove the particles adhering to the side wall of the female mold assembly block 6, and the particles will enter the collection groove 15 of the strip scraper 13 along the upward side of the strip scraper 13. After the upward movement and reset into place, the worker uses a purge air gun and aims at the collection groove 15 to blow out the particles in the collection groove 15, and collect them by conventional technology;

[0058] In addition, after the molding is completed, the electric control cabinet controls the first heater 9 and the second heater 8 to stop heating, or the heating temperature drops, and after the molded composite product is cooled, the reduction motor 24 is started again, and the output shaft of the reduction motor 24 rotates, and drives the drive shaft 29 to rotate, so that the protrusion 31 rotates in the through groove 32. When the protrusion 31 hits the top wall of the through groove 32, it drives the floating column 28 to move upward, and drives the stripping plate 16 to move upward, so that the stripping plate 16 can lift the composite product after compression molding, which is convenient for workers to unload.

[0059] In addition, in the present embodiment, the actions of the eight hydraulic cylinders 2 are synchronized. Eight solenoid valves can be installed on the oil supply station of the hydraulic cylinder 2, each solenoid valve controls the action of one hydraulic cylinder 2, and then the eight solenoid valves are controlled to act synchronously through the electric control cabinet, so that the eight hydraulic cylinders 2 can act synchronously, so that the four female mold assembly blocks 6 can produce the same movement synchronously, that is, when the telescopic rods of the eight hydraulic cylinders 2 are synchronously extended, the four female mold assembly blocks 6 will be driven to move synchronously in the direction close to the female mold 5, and when the telescopic rods of the eight hydraulic cylinders 2 are synchronously shortened, the four female mold assembly blocks 6 will be driven to move synchronously in the direction away from the female mold 5, so as to achieve a better control effect.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A composite material product thermoforming servo hydraulic press, comprising a servo hydraulic press base and a hydraulic assembly mounted on the base, wherein a heating assembly is also provided on the base, characterized in that: Also includes: A fixed plate is installed on the top of the machine base, and a female mold is fixed on the top of the fixed plate; Four female mold assembly blocks are movably connected to the top surface of the fixed plate, and the four female mold assembly blocks are distributed on four sides of the female mold. When the outer walls of the four female mold assembly blocks abut against the side walls of the female mold, a molding cavity is formed between the top surface of the female mold and the side walls of the four female mold assembly blocks. A driving assembly mounted on the fixed plate, the driving assembly is used to drive the female mold assembly block to move horizontally in a direction away from the female mold, and synchronously drive the female mold assembly block to move upward; A connecting plate installed at the output end of the hydraulic assembly, a mounting plate fixedly connected to the bottom of the connecting plate, and a male mold fixedly connected to the bottom of the mounting plate; The cleaning components connected to the four side walls of the mounting plate are rotated respectively; The driving assembly includes a support plate connected to the top surface of the fixed plate, a hydraulic cylinder is horizontally installed on the support plate, the end of the telescopic rod of the hydraulic cylinder is vertically slidably connected to the side wall of the female mold assembly block, an ear block is horizontally fixed to the side wall of the female mold, an air avoidance groove for the ear block to pass freely is provided on the outer wall of the female mold assembly block, a fixing pin is penetrated at one end of the ear block away from the female mold, an oblique groove for the fixing pin to be inserted is provided on the inner side wall of the air avoidance groove, the length direction of the oblique groove forms an angle with the vertical direction, and the fixing pin slides freely in the oblique groove; The cleaning assembly includes a rotating block rotatably connected to a receiving groove provided in a side wall of the mounting plate, a strip scraper is fixedly connected to an outer wall of the rotating block, and an elastic reset unit is provided on the mounting plate, the elastic reset unit is used to drive the strip scraper to rotate around a rotating fulcrum of the rotating block on the mounting plate to a horizontal state; During the press forming operation, the strip scraper will be squeezed by the top surface of the female mold assembly block, causing the rotating block to rotate upward. When the press forming is completed, when the four female mold assembly blocks move away from the female mold, the rotating block rotates in the opposite direction and causes the strip scraper to rotate to a horizontal state. At the same time, the outer wall of the strip scraper away from the mounting plate abuts against the outer wall of the female mold assembly block toward the female mold. Then, as the male mold moves upward and resets, the side wall of the strip scraper can scrape off the particles on the side wall of the female mold assembly block.

2. The composite product thermoforming servo hydraulic press according to claim 1, characterized in that: The heating component includes a lifting seat connected to the output end of the hydraulic component, a first heater is fixedly connected to the downward side of the lifting seat, a connecting plate is installed on the bottom surface of the first heater, a second heater is connected to the top surface of the base, and a fixing plate is fixedly connected to the top surface of the second heater.

3. The composite product thermoforming servo hydraulic press according to claim 1, characterized in that: A connector is fixedly connected to the end of the telescopic rod of the hydraulic cylinder, a small diameter section is arranged around the connector, and a stop groove for the connector to engage is opened on the side wall of the female mold assembly block. The stop groove has a T-shaped cross section and is engaged with the connector.

4. The composite product thermoforming servo hydraulic press according to claim 1, characterized in that: Both ends of the female mold assembly block in the length direction are inclined, so that after the side wall of the female mold assembly block abuts against the outer wall of the female mold, the four female mold assembly blocks are spliced ​​into a U-shaped structure.

5. The composite product thermoforming servo hydraulic press according to claim 1, characterized in that: The hydraulic cylinders are arranged in four groups, each group having two hydraulic cylinders. The four groups of hydraulic cylinders correspond to four female mold assembly blocks respectively, and the two hydraulic cylinders in each group correspond to the two ends of the female mold assembly block in the length direction respectively.

6. The composite product thermoforming servo hydraulic press according to claim 5, characterized in that: A collecting groove is arranged on the upper surface of the strip scraper.

7. The composite product thermoforming servo hydraulic press according to claim 6, characterized in that: The elastic reset unit includes a fixed shaft fixed to the inner wall of the accommodating groove, a mounting hole for the fixed shaft to pass freely is opened on the outer wall of the rotating block, a mounting groove is opened on the outer wall of the rotating block, a volute spring is installed in the mounting groove, the volute spring is wrapped around the periphery of the fixed shaft, and the two ends of the volute spring are respectively fixed to the inner wall of the mounting groove and the periphery of the fixed shaft.

8. The composite product thermoforming servo hydraulic press according to claim 1, characterized in that: A demolding assembly is provided in the female mold, and the demolding assembly includes a floating column vertically penetrated through the top surface of the female mold, the floating column slides freely in the female mold, and a demolding plate is fixedly connected to the upper end of the floating column, and a storage cavity for the demolding plate to engage is provided on the top surface of the female mold, a support is fixedly connected to the top of the fixed plate, and a driving shaft is horizontally rotatably connected to the support, a through groove is provided on the periphery of the floating column for the driving shaft to pass freely, a protrusion is fixedly connected to the periphery of the driving shaft, the protrusion is provided in the through groove, and the driving shaft is driven to rotate by a rotating unit installed on the fixed plate.

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