A spray disc hot press forming device with stress relief function

Abstract

The application discloses a kind of hot press forming devices of spray tray with stress relief function, it is related to spray tray production and processing equipment technical field, including installation box, hot pressing unit, elimination unit, support unit and stripping unit, wherein installation box is used to install and fix hot pressing unit, elimination unit, support unit and stripping unit, hot pressing unit is used for the hot press forming of spray tray, elimination unit is used to eliminate the stress generated in hot pressing process, support unit is used to prevent the deformation of aperture in the hot pressing process of spray tray, stripping unit is used for the auxiliary stripping of spray tray after forming, after the placement of material to be processed is completed, workpiece is hot-pressed by hot pressing unit, cooperate with elimination unit to eliminate the stress generated in hot pressing process, avoid the deformation of aperture in the hot pressing process of spray tray by support unit, stripping unit auxiliary spray tray after forming is quickly stripped.

Description

Technical Field

[0001] This invention relates to the field of spray tray production and processing equipment technology, specifically a spray tray hot pressing forming device with stress relief function. Background Technology

[0002] Spray trays, as key components widely used in industrial production, play a vital role in numerous fields such as chemical engineering, metallurgy, and environmental protection. In practical applications, spray trays face stringent requirements regarding performance and quality. Key indicators include the flatness of the tray surface, the precision of the aperture, and the overall strength and stability. Achieving these indicators hinges on the spray tray's molding process. Hot pressing, a commonly used manufacturing method, is widely applied in spray tray production due to its ability to soften materials at high temperatures and shape them under pressure, resulting in precise shapes and excellent performance.

[0003] In traditional spray disc hot-press forming devices, residual stress often arises inside the spray disc due to uneven material heating and unreasonable pressure distribution during the forming process. This stress concentration is particularly pronounced at the disc's edges and around the orifices. These residual stresses do not disappear immediately after forming but are gradually released under certain conditions, leading to spray disc deformation. For example, during long-term use, factors such as temperature changes and external forces can trigger warping and twisting of the spray disc, severely affecting its flatness and performance, resulting in uneven spraying and reduced process effectiveness.

[0004] The orifice diameter on the spray plate is the core structure for achieving uniform spraying, and the accuracy of the orifice diameter directly determines the spraying effect. However, in traditional hot pressing molding processes, due to unreasonable mold design and improper control of molding process parameters, the orifice diameter of the spray plate is prone to deformation during molding. During heating and pressurization, uneven material flow may cause excessive compression or stretching of the material around the orifice, resulting in changes in the orifice size.

[0005] Demolding is a crucial step in the thermoforming process, but in traditional equipment, demolding difficulties are a common problem. Due to the strong adhesion between the spray plate and the mold, especially after high-temperature molding, the material and mold surface may undergo a degree of chemical bonding or physical adsorption, requiring significant force for demolding. This not only increases the difficulty of demolding but also easily leads to damage to the spray plate during demolding, such as surface scratches and deformation, affecting product quality. Furthermore, demolding difficulties also prolong production cycles, reduce production efficiency, and increase production costs. Summary of the Invention

[0006] The purpose of this invention is to provide a spray disc hot pressing forming device with stress relief function to solve the problems raised in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The aforementioned spray plate hot-press forming device with stress relief function includes a mounting box, a hot-pressing unit, a stress-relieving unit, a support unit, and a demolding unit. The mounting box is placed on a horizontal ground. The hot-pressing unit is fixedly connected to the mounting box, the hot-pressing unit is fixedly connected to the stress-relieving unit, the stress-relieving unit is fixedly connected to the hot-pressing unit, the support unit is fixedly connected to the hot-pressing unit, the support unit is fixedly connected to the demolding unit, and the demolding unit is slidably connected to the hot-pressing unit. The demolding unit has an auxiliary demolding function.

[0009] The mounting box is used to install and fix the hot pressing unit, the stress relief unit, the support unit, and the demolding unit. The hot pressing unit is used for hot pressing and forming of the spray tray. The stress relief unit is used to relieve the stress generated during the hot pressing process. The support unit is used to prevent the aperture of the spray tray from deforming during the hot pressing process. The demolding unit is used to assist in demolding the spray tray after forming. After the material to be processed is placed, the workpiece is hot pressed and formed by the hot pressing unit. The stress relief unit is used to relieve the stress generated during the hot pressing process. The support unit is used to prevent the aperture of the spray tray from deforming during the hot pressing process. The demolding unit assists in the rapid demolding of the formed spray tray.

[0010] Furthermore, the hot pressing unit includes a hydraulic motor, an upper mold, a lower mold, a worktable, a buffer spring, and a pressure plate. The fixed end of the hydraulic motor is fixedly installed on the upper end of the mounting box, and the output end of the hydraulic motor is fixedly connected to the upper mold. The lower mold is fixedly installed on the worktable, which is fixedly installed on the lower surface inside the mounting box. One end of the buffer spring is fixedly connected to the upper mold, and the other end of the buffer spring is fixedly connected to the pressure plate. The inner wall of the lower mold is provided with a spiral guide groove.

[0011] After the workpiece to be processed is placed on the lower mold, the controller starts the hydraulic motor, which drives the lower mold to move downward, causing the buffer spring and the pressure plate to move downward synchronously. When the pressure plate contacts the workpiece to be processed, the upper mold continues to move downward to compress the buffer spring, gradually and slowly pressing the workpiece to fix it. When the upper mold continues to move downward to squeeze the workpiece, the workpiece enters the lower mold and is then hot-pressed.

[0012] Furthermore, the elimination unit includes an elastic connecting rod, a central pressure ring, an edge pressure ring, an arc-shaped rod, an electromagnet, a magnetic block, and an auxiliary block. There are multiple elastic connecting rods, some of which are fixedly connected at one end to the upper mold and at the other end to the central pressure ring; others are fixedly connected at one end to the upper mold and at the other end to the edge pressure ring. The central pressure ring is slidably installed inside the upper mold, and the edge pressure ring is slidably connected to the upper mold. The arc-shaped rod is fixedly installed inside the upper mold, and the electromagnet is fixedly installed in the middle of the arc-shaped rod. One end of the magnetic block is slidably connected to the upper mold via a telescopic rod, and the other end of the magnetic block is fixedly connected to the auxiliary block. Both the central pressure ring and the edge pressure ring have magnetic rings inside, and both the central pressure ring and the edge pressure ring have thin-film pressure sensors at their bottoms.

[0013] When the thin-film pressure sensor detects that the pressure at the edge of the workpiece is lower than the pressure at the center, it sends a signal back to the controller. The controller then sends current to the electromagnet, causing the electromagnet to form polarity. This pushes the magnetic block along the arc-shaped rod to both ends. As it moves, the vertical height of the magnetic block gradually decreases, causing the auxiliary block to move downwards while moving to both ends. When it contacts the edge pressure ring, it gradually squeezes the edge pressure ring, causing the elastic connecting rod to move downwards. This provides additional pressure to the edge of the workpiece, preventing the center from being thin and the edge from being thick. This eliminates stress and prevents the spray plate from deforming during the hot pressing process, which would affect the processing quality.

[0014] Furthermore, the support unit includes a bent rod, a conductive block, a conductive plate, a pressing plate, a holding box, and a movable plate. One end of the bent rod is fixedly connected to the upper mold, and the other end of the bent rod is fixedly connected to the pressing plate. The conductive block is fixedly installed on the bent rod. One end of the conductive plate is fixedly connected to the pressure plate, and the other end of the conductive plate is slidably connected to the bent rod. The holding box is fixedly installed on the mounting box, and the holding box contains magnetorheological fluid. The movable plate is slidably installed inside the holding box. The holding box and the lower mold are connected by a pipe.

[0015] Furthermore, the support unit also includes a spring-driven electric push rod, a fixed ring, a bar magnet, a mounting plate, a guide tube, and a return spring. The conductive plate is electrically connected to the spring-driven electric push rod. The fixed end of the spring-driven electric push rod is fixedly installed on the upper end of the lower mold. The telescopic end of the spring-driven electric push rod is fixedly connected to the fixed ring. Bar magnets are uniformly fixedly installed on the fixed ring. The fixed ring is slidably installed on the lower mold. The mounting plate is slidably installed inside the lower mold. One end of the guide tube is fixedly connected to the mounting plate, and the other end of the guide tube is provided with an elastic airbag. One end of the return spring is fixedly connected to the moving plate, and the other end of the return spring is fixedly connected to the holding box. The mounting plate is made of magnets, and the magnetism of the mounting plate is the same as that of the magnetic rings inside the central pressure ring and the edge pressure ring.

[0016] During the downward movement of the upper mold, on one hand, the upper mold drives the pressing plate downward through the bent rod. When the pressing plate contacts the moving plate and continues to move downward, it squeezes the reset spring, thereby squeezing the magnetorheological fluid inside the container into the lower mold. As the magnetorheological fluid gradually increases in the lower mold, it enters the elastic airbag through the guide tube. On the other hand, when the pressure plate contacts the lower mold, the upper mold continues to drive the bent rod downward. When the conductive plate contacts the conductive block, the controller's current is transmitted to the spring electric push rod through the conductive block and conductive plate. The spring electric push rod extends, driving the fixed ring and bar magnet downward to the lower end of the lower mold. Under the action of the bar magnet, a magnetic field is applied to the magnetorheological fluid, causing it to solidify. At this time, the elastic airbag is in the solidified magnetic field. Under the action of the rheological fluid, it exhibits a certain hardness, thus extending into the aperture of the spray plate and providing support to the aperture, preventing deformation of the spray plate during hot pressing and ensuring the processing quality of the spray plate. After hot pressing, the upper mold moves upward under the action of the hydraulic motor, causing the bent rod and conductive block to move upward. At this time, the conductive block and conductive plate are no longer in contact. The elastic electric push rod, under its own restoring force, moves the fixed ring and bar magnet upward, canceling the magnetic field applied to the magnetorheological fluid inside the lower mold. The magnetorheological fluid then returns to a liquid state. When the pressing plate moves upward and disengages from the moving plate, the restoring force of the return spring causes the moving plate to move upward, thus drawing the liquid magnetorheological fluid inside the lower mold back into the holding tank to prepare for the next hot pressing.

[0017] Furthermore, the demolding unit includes a demolding cylinder, a deformation spring, a locking block, and a telescopic spring. The demolding cylinder is fixedly connected to the mounting plate. One end of the deformation spring is fixedly connected to the demolding cylinder, and the other end of the deformation spring is fixedly connected to the locking block. The locking block is rotatably mounted on the demolding cylinder. One end of the telescopic spring is fixedly connected to the mounting plate, and the other end of the telescopic spring is slidably mounted on the inner surface of the lower mold.

[0018] During the hot pressing process of the upper mold moving downwards, the center of the workpiece enters the demolding cylinder, while the edges squeeze the demolding cylinder downwards. At this time, the magnetic rings inside the central pressure ring and the edge pressure rings, due to the repulsion of like poles, push the mounting plate downwards, compressing the telescopic spring. Because the workpiece is being hot pressed, the deformation spring contracts upon receiving the temperature increase, causing the locking block to rotate towards the outer wall of the demolding cylinder. After the workpiece has completed hot pressing, the controller may instruct external cold air to enter the demolding cylinder to complete the cooling and shaping of the spray plate. At this time, the temperature decreases, and the deformation spring gradually returns to its initial length under the action of temperature drop, thus pushing the mounting plate downwards. The moving block rotates outward and engages with the spiral guide groove inside the lower mold, initiating the demolding action. As the upper mold gradually moves upward, the magnetic force on the mounting plate weakens, and the telescopic spring, under its own restoring force, gradually drives the mounting plate and demolding cylinder upward. Since the block is in the spiral guide groove, the demolding cylinder begins to rotate and move upward. At this time, the pressure plate continues to apply pressure to the spray plate under the action of the buffer spring, ensuring that the spray plate remains fixed. This forms a working state where the spray plate is fixed and the demolding cylinder rotates, thereby overcoming the physical adsorption of the spray plate on the inner wall surface of the demolding cylinder during high-temperature molding, facilitating the rapid demolding of the spray plate.

[0019] Furthermore, on the same horizontal plane, two adjacent bar magnets have opposite magnetic properties.

[0020] In order to apply a magnetic field to the magnetorheological fluid in the guide tube and elastic air bladder of the lower mold, thereby solidifying the magnetorheological fluid, the aperture of the spray plate is supported to prevent deformation of the spray plate at the aperture during hot pressing, thus ensuring the processing quality of the spray plate.

[0021] Furthermore, in the vertical direction, the initial height of the demolding cylinder is higher than the upper surface of the lower mold.

[0022] In order to make the demolding cylinder push out the molded spray plate in the final stage of demolding, thus facilitating demolding.

[0023] Furthermore, in the vertical direction, the length of the auxiliary block at the end closer to the central pressure ring is greater than the length at the end farther from the central pressure ring.

[0024] To gradually apply pressure to the edge pressure ring as the auxiliary block moves to both sides, and to apply additional pressure to the edge of the spray plate, this method avoids the situation where the center is thin and the edge is thick during the hot pressing of the spray plate, eliminates stress, and prevents deformation of the spray plate during the hot pressing process, which would affect the processing quality.

[0025] Furthermore, a controller is provided on the mounting box.

[0026] To automate the operation of the equipment, save manpower, and improve the timeliness of the equipment's response.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. This invention uses a thin-film pressure sensor to detect when the pressure at the edge of the workpiece is too low and the pressure at the center is too high. The sensor then feeds a signal back to the controller, which sends current to the electromagnet, causing the electromagnet to form polarity. This propels the magnetic block along the arc-shaped rod to both ends. As the block moves, its vertical height gradually decreases, causing the auxiliary block to move downwards while simultaneously moving to both ends. When it contacts the edge pressure ring, it gradually compresses the ring, causing the elastic connecting rod to move downwards. This provides additional pressure to the edge of the workpiece, preventing a thin center and thick edges, thus eliminating stress and preventing deformation of the spray plate during hot pressing, which would affect processing quality.

[0029] 2. In this invention, during the downward movement of the upper mold, on one hand, the upper mold drives the pressing plate downward via a bent rod. When the pressing plate contacts the moving plate and continues to move downward, it squeezes the reset spring, thereby squeezing the magnetorheological fluid inside the container into the lower mold. As the magnetorheological fluid gradually increases in the lower mold, it enters the elastic airbag through the guide tube. On the other hand, when the pressure plate contacts the lower mold, the upper mold continues to drive the bent rod downward. When the conductive plate contacts the conductive block, the controller's current is transmitted to the spring electric push rod through the conductive block and conductive plate. The spring electric push rod extends, driving the fixing ring and the bar magnet downward to the lower end of the lower mold. Thus, under the action of the bar magnet, a magnetic field is applied to the magnetorheological fluid, causing it to solidify. At this time, the elastic airbag solidifies. Under the influence of the magnetorheological fluid, it exhibits a certain hardness, allowing it to penetrate into the aperture of the spray plate and provide support to the aperture, preventing deformation during hot pressing and ensuring the processing quality of the spray plate. After hot pressing, the upper mold moves upward under the action of the hydraulic motor, causing the bent rod and conductive block to move upward. At this time, the conductive block disengages from the conductive plate, and the elastic electric push rod, under its own restoring force, moves the fixed ring and bar magnet upward, canceling the magnetic field applied to the magnetorheological fluid inside the lower mold. The magnetorheological fluid then returns to a liquid state. When the pressing plate moves upward and disengages from the moving plate, the restoring force of the return spring causes the moving plate to move upward, thus drawing the liquid magnetorheological fluid inside the lower mold back into the holding tank to prepare for the next hot pressing.

[0030] 3. In this invention, during the hot pressing process of the workpiece as the upper mold moves downward, the center of the workpiece enters the demolding cylinder, while the edges squeeze the demolding cylinder downward. At this time, the magnetic rings inside the central pressure ring and the edge pressure rings, under the repulsive force of like poles, push the mounting plate downward to compress the telescopic spring. Since the workpiece is being hot pressed, the deformation spring contracts upon receiving the temperature increase, causing the locking block to rotate towards the outer wall of the demolding cylinder. After the workpiece has completed hot pressing, the controller may instruct external cold air to enter the demolding cylinder to complete the cooling and shaping of the spray plate. At this time, the temperature decreases, and the deformation spring gradually returns to its initial length under the action of temperature drop. This pushes the locking block to rotate outward and engage with the spiral guide groove in the lower mold, thus initiating the demolding action. As the upper mold gradually moves upward, the magnetic force on the mounting plate weakens, and the telescopic spring, under its own restoring force, gradually drives the mounting plate and the demolding cylinder upward. Since the locking block is in the spiral guide groove, the demolding cylinder begins to rotate and move upward. At this time, the pressure plate continues to apply pressure to the spray plate under the action of the buffer spring, ensuring that the spray plate remains fixed. This forms a working state where the spray plate is fixed and the demolding cylinder rotates, thereby overcoming the physical adsorption of the spray plate on the inner wall surface of the demolding cylinder during high-temperature molding, facilitating the rapid demolding of the spray plate. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall appearance structure of a spray disc hot pressing forming device with stress relief function according to the present invention;

[0032] Figure 2 This is a schematic diagram of the installation position of the hot pressing unit of a spray disc hot pressing forming device with stress relief function according to the present invention.

[0033] Figure 3 This invention relates to a hot pressing device for spray discs with stress relief function. Figure 2 A partial enlarged view of the structure at point A in the middle;

[0034] Figure 4 This is a schematic diagram of the installation position of the support unit of a spray disc hot pressing forming device with stress relief function according to the present invention.

[0035] Figure 5 This is a schematic diagram of the installation positions of the demolding cylinder, deformation spring, and locking block of a spray disc hot pressing forming device with stress relief function according to the present invention.

[0036] Figure 6 This invention relates to a hot pressing device for spray discs with stress relief function. Figure 5 A partial enlarged view of the structure at point B in the middle;

[0037] Figure 7This is a schematic diagram of the mounting plate, guide pipe and telescopic spring of a spray disc hot pressing forming device with stress relief function according to the present invention.

[0038] Figure 8 This is a schematic diagram of the internal structure of the upper mold of a spray disc hot pressing forming device with stress relief function according to the present invention.

[0039] Figure 9 This invention relates to a hot pressing device for spray discs with stress relief function. Figure 8 A partial enlarged view of the structure at point C.

[0040] In the diagram: 1. Mounting box; 2. Hot pressing unit; 21. Hydraulic motor; 22. Upper mold; 23. Lower mold; 24. Worktable; 25. Buffer spring; 26. Pressure plate; 3. Elimination unit; 31. Elastic connecting rod; 32. Central pressure ring; 33. Edge pressure ring; 34. Arc rod; 35. Electromagnet; 36. Magnetic block; 37. Auxiliary block; 4. Support unit; 41. Bending rod; 42. Conductive block; 43. Conductive plate; 44. Press plate; 45. Holding box; 46. Moving plate; 47. Spring electric push rod; 48. Fixing ring; 49. Bar magnet; 410. Mounting plate; 411. Guide pipe; 412. Reset spring; 5. Demolding unit; 51. Demolding cylinder; 52. Deformation spring; 53. Clamping block; 54. Telescopic spring. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example: Figures 1-9 As shown, the present invention provides a technical solution:

[0043] like Figure 1 , Figure 4 , Figure 9 As shown, a spray plate hot pressing forming device with stress relief function includes a mounting box 1, a hot pressing unit 2, a stress relief unit 3, a support unit 4, and a demolding unit 5. The mounting box 1 is placed on a horizontal ground. The hot pressing unit 2 is fixedly connected to the mounting box 1, the hot pressing unit 2 is fixedly connected to the stress relief unit 3, the stress relief unit 3 is fixedly connected to the hot pressing unit 2, the support unit 4 is fixedly connected to the hot pressing unit 2, the support unit 4 is fixedly connected to the demolding unit 5, the demolding unit 5 is slidably connected to the hot pressing unit 2, and the demolding unit 5 has the function of assisting demolding.

[0044] Mounting box 1 is used to install and fix hot pressing unit 2, stress relief unit 3, support unit 4 and demolding unit 5. Hot pressing unit 2 is used for hot pressing and forming of spray tray. Stress relief unit 3 is used to relieve stress generated during hot pressing. Support unit 4 is used to prevent deformation of the aperture of spray tray during hot pressing. Demolding unit 5 is used to assist in demolding of spray tray after forming. After the material to be processed is placed, the workpiece is hot pressed and formed by hot pressing unit 2. Stress generated during hot pressing is relieved by stress relief unit 3. Stress generated during hot pressing is prevented by support unit 4. Demolding unit 5 assists in the rapid demolding of spray tray after forming.

[0045] like Figure 2 As shown, the hot pressing unit 2 includes a hydraulic motor 21, an upper mold 22, a lower mold 23, a worktable 24, a buffer spring 25, and a pressure plate 26. The fixed end of the hydraulic motor 21 is fixedly installed on the upper end of the mounting box 1, and the output end of the hydraulic motor 21 is fixedly connected to the upper mold 22. The lower mold 23 is fixedly installed on the worktable 24, and the worktable 24 is fixedly installed on the lower inner surface of the mounting box 1. One end of the buffer spring 25 is fixedly connected to the upper mold 22, and the other end of the buffer spring 25 is fixedly connected to the pressure plate 26. The inner wall of the lower mold 23 is provided with a spiral guide groove.

[0046] After the workpiece to be processed is placed on the lower mold 23, the controller controls the hydraulic motor 21 to start, thereby driving the lower mold 23 to move downward, causing the buffer spring 25 and the pressure plate 26 to move downward synchronously. When the pressure plate 26 contacts the workpiece to be processed, the upper mold 22 continues to move downward to compress the buffer spring 25, gradually and slowly causing the pressure plate 26 to pre-press and fix the workpiece. When the upper mold 22 continues to move downward to squeeze the workpiece, the workpiece enters the lower mold 23, thereby performing hot pressing molding.

[0047] like Figure 9 As shown, the elimination unit 3 includes an elastic connecting rod 31, a central pressure ring 32, an edge pressure ring 33, an arc-shaped rod 34, an electromagnet 35, a magnetic block 36, and an auxiliary block 37. There are multiple elastic connecting rods 31. One part of the elastic connecting rods 31 is fixedly connected at one end to the upper mold 22 and at the other end to the central pressure ring 32. Another part of the elastic connecting rods 31 is fixedly connected at one end to the upper mold 22 and at the other end to the edge pressure ring 33. The central pressure ring 32 is slidably installed inside the upper mold 22, and the edge pressure ring 33 is slidably connected to the upper mold 22. The arc-shaped rod 34 is fixedly installed inside the upper mold 22. The electromagnet 35 is fixedly installed in the middle of the arc-shaped rod 34. One end of the magnetic block 36 is slidably connected to the upper mold 22 through a telescopic rod, and the other end of the magnetic block 36 is fixedly connected to the auxiliary block 37. Magnetic rings are provided inside the central pressure ring 32 and the edge pressure ring 33. Thin-film pressure sensors are provided at the bottom of the central pressure ring 32 and the edge pressure ring 33.

[0048] When the thin-film pressure sensor detects that the pressure at the edge of the workpiece is lower than the pressure at the center, it feeds a signal back to the controller. The controller then sends current to the electromagnet 35, causing the electromagnet 35 to form polarity. This pushes the magnetic block 36 along the arc-shaped rod 34 to both ends. As it moves, the vertical height of the magnetic block 36 gradually decreases, causing the auxiliary block 37 to move downwards while moving to both ends. When it contacts the edge pressure ring 33, it gradually squeezes the edge pressure ring 33, causing it to stretch the elastic connecting rod 31 downwards. This provides additional pressure to the edge of the workpiece, preventing the center from being thin and the edge from being thick. This eliminates stress and prevents the spray plate from deforming during the hot pressing process, which would affect the processing quality.

[0049] like Figure 3 , Figure 4 As shown, the support unit 4 includes a bent rod 41, a conductive block 42, a conductive plate 43, a pressing plate 44, a holding box 45, and a moving plate 46. One end of the bent rod 41 is fixedly connected to the upper mold 22, and the other end of the bent rod 41 is fixedly connected to the pressing plate 44. The conductive block 42 is fixedly installed on the bent rod 41. One end of the conductive plate 43 is fixedly connected to the pressure plate 26, and the other end of the conductive plate 43 is slidably connected to the bent rod 41. The holding box 45 is fixedly installed on the mounting box 1. The holding box 45 contains magnetorheological fluid. The moving plate 46 is slidably installed inside the holding box 45. The holding box 45 and the lower mold 23 are connected by a pipe.

[0050] like Figure 3 , Figure 4 , Figure 7 As shown, the support unit 4 also includes a spring-driven electric push rod 47, a fixing ring 48, a bar magnet 49, a mounting plate 410, a guide tube 411, and a return spring 412. The conductive plate 43 is electrically connected to the spring-driven electric push rod 47. The fixed end of the spring-driven electric push rod 47 is fixedly installed on the upper end of the lower mold 23. The telescopic end of the spring-driven electric push rod 47 is fixedly connected to the fixing ring 48. Bar magnets 49 are evenly fixedly installed on the fixing ring 48. The fixing ring 48 is slidably installed on the lower mold 23. The mounting plate 410 is slidably installed inside the lower mold 23. One end of the guide tube 411 is fixedly connected to the mounting plate 410. The other end of the guide tube 411 is provided with an elastic airbag. One end of the return spring 412 is fixedly connected to the moving plate 46. The other end of the return spring 412 is fixedly connected to the holding box 45. The mounting plate 410 is made of magnets. The magnetism of the mounting plate 410 is the same as that of the magnetic rings inside the central pressure ring 32 and the edge pressure ring 33.

[0051] During the downward movement of the upper mold 22, on one hand, the upper mold 22 drives the pressing plate 44 downward through the bent rod 41. When the pressing plate 44 contacts the moving plate 46 and continues to move downward, squeezing the reset spring 412, the magnetorheological fluid inside the holding box 45 is squeezed into the lower mold 23. As the magnetorheological fluid gradually increases in the lower mold 23, it enters the elastic airbag through the guide tube 411. On the other hand, when the pressure plate 26 contacts the lower mold 23, the upper mold 22 continues to drive the bent rod 41 downward. When the conductive plate 43 contacts the conductive block 42, the current from the controller is transmitted to the spring electric push rod 47 through the conductive block 42 and the conductive plate 43. The spring electric push rod 47 extends, driving the fixing ring 48 and the bar magnet 49 downward to the lower end of the lower mold 23. Under the action of the bar magnet 49, a magnetic field is applied to the magnetorheological fluid, causing it to solidify. The elastic airbag, under the action of the cured magnetorheological fluid, exhibits a certain hardness, thus extending into the aperture of the spray plate and providing a certain supporting force to the aperture of the spray plate, preventing deformation of the aperture during the hot pressing process, thereby ensuring the processing quality of the spray plate. After the hot pressing is completed, the upper mold 22 moves upward under the action of the hydraulic motor 21, driving the bent rod 41 and the conductive block 42 to move upward. At this time, the conductive block 42 and the conductive plate 43 disengage. Under the action of its own restoring force, the elastic electric push rod drives the fixed ring 48 and the bar magnet 49 to move upward, canceling the magnetic field applied to the magnetorheological fluid inside the lower mold 23, and the magnetorheological fluid thus returns to a liquid state. When the pressing plate 44 moves upward and disengages from the moving plate 46, under the action of the self-restoring force of the return spring 412, it drives the moving plate 46 to move upward, thereby drawing the liquid magnetorheological fluid inside the lower mold 23 back into the holding box 45 to prepare for the next hot pressing.

[0052] like Figure 3 , Figures 5-8 As shown, the demolding unit 5 includes a demolding cylinder 51, a deformation spring 52, a locking block 53, and a telescopic spring 54. The demolding cylinder 51 is fixedly connected to the mounting plate 410. One end of the deformation spring 52 is fixedly connected to the demolding cylinder 51, and the other end of the deformation spring 52 is fixedly connected to the locking block 53. The locking block 53 is rotatably mounted on the demolding cylinder 51. One end of the telescopic spring 54 is fixedly connected to the mounting plate 410, and the other end of the telescopic spring 54 is slidably mounted on the inner surface of the lower mold 23.

[0053] During the hot pressing process of the upper mold 22 moving downwards to press the workpiece, the center part of the workpiece enters the demolding cylinder 51, while the edge part squeezes the demolding cylinder 51 downwards. At this time, the magnetic rings inside the central pressure ring 32 and the edge pressure ring 33, under the action of like pole repulsion, push the mounting plate 410 downwards to compress the telescopic spring 54. Since the workpiece is being hot pressed at this time, the deformation spring 52 contracts after receiving the temperature rise, driving the locking block 53 to rotate towards the outer wall of the demolding cylinder 51. After the workpiece is hot pressed, the controller may instruct external cold air to enter the demolding cylinder 51 to complete the cooling and shaping of the spray plate. At this time, the temperature drops, and the deformation spring 52 gradually returns to its initial length under the action of temperature drop, thereby pushing the locking block 53 to rotate towards the outer wall of the demolding cylinder 51. Block 53 rotates outward and engages with the spiral guide groove inside the lower mold 23, at which point the demolding action is performed. As the upper mold 22 gradually moves upward, the magnetic force on the mounting plate 410 weakens. Under the action of its own restoring force, the telescopic spring 54 gradually drives the mounting plate 410 and the demolding cylinder 51 to move upward. Since the block 53 is in the spiral guide groove, the demolding cylinder 51 begins to rotate and move upward. At this time, the pressure plate 26 continues to apply pressure to the spray plate under the action of the buffer spring 25 to ensure that the spray plate remains fixed. At this time, the working state of fixed spray plate and rotating demolding cylinder 51 is formed, thereby overcoming the physical adsorption of the spray plate on the inner wall surface of the demolding cylinder 51 during high-temperature molding, and facilitating the rapid demolding of the spray plate.

[0054] like Figure 3 As shown, on the same horizontal plane, two adjacent bar magnets 49 have opposite magnetic properties.

[0055] In order to apply a magnetic field to the inner guide tube 411 of the lower mold 23 and the magnetorheological fluid in the elastic air bag, thereby solidifying the magnetorheological fluid and supporting the aperture of the spray plate, so as to prevent the spray plate from deforming at the aperture during the hot pressing process, thus ensuring the processing quality of the spray plate.

[0056] like Figure 2 , Figure 3 As shown, in the vertical direction, the initial height of the demolding cylinder 51 is higher than the upper surface of the lower mold 23.

[0057] In order to make the demolding cylinder 51 push out the molded spray plate in the final stage of demolding, so as to facilitate demolding.

[0058] like Figure 9 As shown, in the vertical direction, the length of the auxiliary block 37 at the end closer to the central pressure ring 32 is greater than the length at the end farther from the central pressure ring 32.

[0059] In order to gradually apply pressure to the edge pressure ring 33 when the auxiliary block 37 moves to both sides, and to apply additional pressure to the edge of the spray plate, so as to avoid the situation of the center being thin and the edge being thick during the hot pressing of the spray plate, eliminate stress, and prevent the spray plate from deforming during the hot pressing process, which would affect the processing quality.

[0060] like Figure 1 As shown, a controller is installed on the mounting box 1.

[0061] To automate the operation of the equipment, save manpower, and improve the timeliness of the equipment's response.

[0062] Working principle of the invention:

[0063] After the workpiece to be processed is placed on the lower mold 23, the controller controls the hydraulic motor 21 to start, thereby driving the lower mold 23 to move downward, causing the buffer spring 25 and the pressure plate 26 to move downward synchronously. When the pressure plate 26 contacts the workpiece to be processed, the upper mold 22 continues to move downward to compress the buffer spring 25, gradually and slowly causing the pressure plate 26 to pre-press and fix the workpiece. When the upper mold 22 continues to move downward to squeeze the workpiece, the workpiece enters the lower mold 23, thereby performing hot pressing molding.

[0064] When the thin-film pressure sensor detects that the pressure at the edge of the workpiece is lower than the pressure at the center, it feeds a signal back to the controller. The controller then sends current to the electromagnet 35, causing the electromagnet 35 to form polarity. This pushes the magnetic block 36 along the arc-shaped rod 34 to both ends. As it moves, the vertical height of the magnetic block 36 gradually decreases, causing the auxiliary block 37 to move downwards while moving to both ends. When it contacts the edge pressure ring 33, it gradually squeezes the edge pressure ring 33, causing it to stretch the elastic connecting rod 31 downwards. This provides additional pressure to the edge of the workpiece, preventing the center from being thin and the edge from being thick. This eliminates stress and prevents the spray plate from deforming during the hot pressing process, which would affect the processing quality.

[0065] During the downward movement of the upper mold 22, on one hand, the upper mold 22 drives the pressing plate 44 downward through the bent rod 41. When the pressing plate 44 contacts the moving plate 46 and continues to move downward, squeezing the reset spring 412, the magnetorheological fluid inside the holding box 45 is squeezed into the lower mold 23. As the magnetorheological fluid gradually increases in the lower mold 23, it enters the elastic airbag through the guide tube 411. On the other hand, when the pressure plate 26 contacts the lower mold 23, the upper mold 22 continues to drive the bent rod 41 downward. When the conductive plate 43 contacts the conductive block 42, the current from the controller is transmitted to the spring electric push rod 47 through the conductive block 42 and the conductive plate 43. The spring electric push rod 47 extends, driving the fixing ring 48 and the bar magnet 49 downward to the lower end of the lower mold 23. Under the action of the bar magnet 49, a magnetic field is applied to the magnetorheological fluid, causing it to solidify. The elastic airbag, under the action of the cured magnetorheological fluid, exhibits a certain hardness, thus extending into the aperture of the spray plate and providing a certain supporting force to the aperture of the spray plate, preventing deformation of the aperture during the hot pressing process, thereby ensuring the processing quality of the spray plate. After the hot pressing is completed, the upper mold 22 moves upward under the action of the hydraulic motor 21, driving the bent rod 41 and the conductive block 42 to move upward. At this time, the conductive block 42 and the conductive plate 43 disengage. Under the action of its own restoring force, the elastic electric push rod drives the fixed ring 48 and the bar magnet 49 to move upward, canceling the magnetic field applied to the magnetorheological fluid inside the lower mold 23, and the magnetorheological fluid thus returns to a liquid state. When the pressing plate 44 moves upward and disengages from the moving plate 46, under the action of the self-restoring force of the return spring 412, it drives the moving plate 46 to move upward, thereby drawing the liquid magnetorheological fluid inside the lower mold 23 back into the holding box 45 to prepare for the next hot pressing.

[0066] During the hot pressing process of the upper mold 22 moving downwards to press the workpiece, the center part of the workpiece enters the demolding cylinder 51, while the edge part squeezes the demolding cylinder 51 downwards. At this time, the magnetic rings inside the central pressure ring 32 and the edge pressure ring 33, under the action of like pole repulsion, push the mounting plate 410 downwards to compress the telescopic spring 54. Since the workpiece is being hot pressed at this time, the deformation spring 52 contracts after receiving the temperature rise, driving the locking block 53 to rotate towards the outer wall of the demolding cylinder 51. After the workpiece is hot pressed, the controller may instruct external cold air to enter the demolding cylinder 51 to complete the cooling and shaping of the spray plate. At this time, the temperature drops, and the deformation spring 52 gradually returns to its initial length under the action of temperature drop, thereby pushing the locking block 53 to rotate towards the outer wall of the demolding cylinder 51. Block 53 rotates outward and engages with the spiral guide groove inside the lower mold 23, at which point the demolding action is performed. As the upper mold 22 gradually moves upward, the magnetic force on the mounting plate 410 weakens. Under the action of its own restoring force, the telescopic spring 54 gradually drives the mounting plate 410 and the demolding cylinder 51 to move upward. Since the block 53 is in the spiral guide groove, the demolding cylinder 51 begins to rotate and move upward. At this time, the pressure plate 26 continues to apply pressure to the spray plate under the action of the buffer spring 25 to ensure that the spray plate remains fixed. At this time, the working state of fixed spray plate and rotating demolding cylinder 51 is formed, thereby overcoming the physical adsorption of the spray plate on the inner wall surface of the demolding cylinder 51 during high-temperature molding, and facilitating the rapid demolding of the spray plate.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A spray pan hot press forming device having a stress relief function, characterized by: The spray disc hot press forming device with stress relief function, including installation box (1), hot pressing unit (2), elimination unit (3), support unit (4) and stripping unit (5), the installation box (1) is placed on the horizontal ground, the hot pressing unit (2) is fixedly connected with installation box (1), the hot pressing unit (2) is fixedly connected with elimination unit (3), the elimination unit (3) is fixedly connected with hot pressing unit (2), the support unit (4) is fixedly connected with hot pressing unit (2), the support unit (4) is fixedly connected with stripping unit (5), the stripping unit (5) is slidably connected with hot pressing unit (2), the stripping unit (5) has the function of auxiliary stripping; The elimination unit (3) includes elastic connecting rod (31), center pressure ring (32), edge pressure ring (33), arc-shaped rod (34), electromagnet (35), magnetic block (36) and auxiliary block (37), the elastic connecting rod (31) has multiple, wherein one end of a part of the elastic connecting rod (31) is fixedly connected with the upper die (22), and the other end is fixedly connected with the center pressure ring (32), one end of another part of the elastic connecting rod (31) is fixedly connected with the upper die (22), and the other end is fixedly connected with the edge pressure ring (33), the center pressure ring (32) is slidably installed in the upper die (22), the edge pressure ring (33) is slidably connected with the upper die (22), the arc-shaped rod (34) is fixedly installed in the upper die (22), the electromagnet (35) is fixedly installed in the middle of the arc-shaped rod (34), one end of the magnetic block (36) is slidably connected with the upper die (22) through the telescopic rod, the other end of the magnetic block (36) is fixedly connected with the auxiliary block (37), the center pressure ring (32) and the edge pressure ring (33) are provided with magnetic rings in the interiors, and the center pressure ring (32) and the edge pressure ring (33) are provided with film pressure sensors at the bottoms; The support unit (4) includes bent rod (41), conductive block (42), conductive plate (43), pressing plate (44), containing box (45) and moving plate (46), one end of the bent rod (41) is fixedly connected with the upper die (22), the other end of the bent rod (41) is fixedly connected with the pressing plate (44), the conductive block (42) is fixedly installed on the bent rod (41), one end of the conductive plate (43) is fixedly connected with the pressing plate (26), the other end of the conductive plate (43) is slidably connected with the bent rod (41), the containing box (45) is fixedly installed on the installation box (1), the containing box (45) contains the magnetorheological fluid in the interior, the moving plate (46) is slidably installed in the containing box (45), and the containing box (45) and the lower die (23) are connected through the pipeline. The support unit (4) further includes a spring electric push rod (47), a fixed ring (48), a strip-shaped magnet (49), a mounting plate (410), a flow guide pipe (411) and a reset spring (412), the conductive plate (43) is electrically connected with the spring electric push rod (47), the fixed end of the spring electric push rod (47) is fixedly installed on the upper end of the lower mold (23), the telescopic end of the spring electric push rod (47) is fixedly connected with the fixed ring (48), the strip-shaped magnets (49) are uniformly and fixedly installed on the fixed ring (48), the fixed ring (48) is slidingly installed on the lower mold (23), the mounting plate (410) is slidingly installed inside the lower mold (23), one end of the flow guide pipe (411) is fixedly connected with the mounting plate (410), the other end of the flow guide pipe (411) is provided with an elastic air bag, one end of the reset spring (412) is fixedly connected with the moving plate (46), the other end of the reset spring (412) is fixedly connected with the containing box (45), the mounting plate (410) is made of a magnet, and the magnetism of the mounting plate (410) is the same as that of the inner magnetic ring of the center pressurizing ring (32) and the edge pressurizing ring (33).

2. The hot press forming apparatus for a spray plate having a stress relief function according to claim 1, characterized in that: The hot pressing unit (2) includes a hydraulic motor (21), an upper mold (22), a lower mold (23), a workbench (24), a buffer spring (25) and a pressing plate (26), the fixed end of the hydraulic motor (21) is fixedly installed on the upper end of the mounting box (1), the output end of the hydraulic motor (21) is fixedly connected with the upper mold (22), the lower mold (23) is fixedly installed on the workbench (24), the workbench (24) is fixedly installed on the inner lower surface of the mounting box (1), one end of the buffer spring (25) is fixedly connected with the upper mold (22), the other end of the buffer spring (25) is fixedly connected with the pressing plate (26), and the inner wall of the lower mold (23) is provided with a spiral guide groove.

3. The hot press forming apparatus for a spray plate having a stress relief function according to claim 1, wherein: The demolding unit (5) includes a demolding cylinder (51), a deformation spring (52), a clamping block (53) and a telescopic spring (54), the demolding cylinder (51) is fixedly connected with the mounting plate (410), one end of the deformation spring (52) is fixedly connected with the demolding cylinder (51), the other end of the deformation spring (52) is fixedly connected with the clamping block (53), the clamping block (53) is rotatably installed on the demolding cylinder (51), one end of the telescopic spring (54) is fixedly connected with the mounting plate (410), and the other end of the telescopic spring (54) is slidingly installed on the inner surface of the lower mold (23).

4. The hot press forming apparatus for a spray plate having a stress relief function according to claim 1, wherein: On the same horizontal plane, the magnetic properties of two adjacent strip-shaped magnets (49) are opposite.

5. The hot press forming apparatus for a spray tray having a stress relief function according to claim 3, wherein: In the vertical direction, the initial height of the demolding cylinder (51) is higher than the upper surface of the lower mold (23).

6. The hot press forming apparatus for a spray plate having a stress relief function according to claim 1, wherein: In the vertical direction, the length of the auxiliary block (37) close to one end of the center pressurizing ring (32) is greater than the length away from the other end of the center pressurizing ring (32).

7. The hot press forming apparatus for a spray tray having a stress relief function according to claim 1, wherein: The mounting box (1) is provided with a controller.

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