A cushion hot press based on mold temperature closed-loop compensation and a control method thereof

Abstract

The application belongs to the technical field of hot presses, and particularly relates to a cushion hot press based on mold temperature closed-loop compensation and a control method thereof, which comprises a supporting bottom plate, a rotating frame and a placing disc. The bottom of the placing disc is fixedly connected with telescopic damping columns, the bottom end of the telescopic damping columns is fixedly connected with the top of the supporting bottom plate, and the bottom of the rotating frame is fixedly connected with the top of the supporting bottom plate away from one side of the placing disc. The temperature sensor is arranged to collect the temperature of the hot pressing plate surface in real time, and the movable heating block is used for compensating and heating the partition with a large temperature difference, so that the problem that the traditional open-loop temperature control mode cannot accurately perceive the actual temperature of different areas of the mold and cannot compensate the temperature difference in real time is solved, the overall temperature uniformity of the hot pressing plate surface can be ensured, the hardness and flatness of the cushion after forming caused by the local temperature not meeting the requirements can be avoided, and the output of unqualified products is reduced.

Description

Technical Field

[0001] This invention relates to the field of hot press technology, specifically to a buffer pad hot press based on mold temperature closed-loop compensation and its control method. Background Technology

[0002] Hot presses are commonly used processing equipment in the production of cushioning pads. In the molding process of cushioning pads, the raw materials need to be placed in the mold and kept at a constant temperature and pressure for a period of time in order to ensure the molding quality of the finished product.

[0003] The existing hot press structure consists of a frame, an upper heating plate, a lower heating plate, and a driving pressurizing component. The upper and lower heating plates continuously heat the mold to maintain its temperature. The upper heating plate is adjustable above the frame, and the lower heating plate is fixedly installed below the frame. The driving pressurizing component connects to and drives the upper heating plate to press down to complete the pressurization operation.

[0004] Currently, most hot presses use open-loop temperature control, relying solely on the preset power of the heating module. This fails to accurately sense the actual temperature of different areas of the mold. When the mold experiences uneven heat distribution due to ambient temperature fluctuations or continuous operation, it cannot compensate for temperature differences in real time, easily leading to substandard local temperatures. This results in the buffer pad failing to meet requirements for hardness and flatness after molding, producing defective products. Furthermore, the buffer structure of traditional hot presses is often fixed, making it impossible to adjust the buffer amount according to the pressing pressure. This can easily damage the mold or finished product due to pressure overload. Therefore, this paper proposes a hot press for buffer pads based on closed-loop mold temperature compensation and its control method to address the problems of uneven heat distribution, inability to compensate for temperature differences in real time, substandard local temperatures, substandard hardness and flatness of the buffer pad after molding, and the inability to adjust the buffer amount according to the pressing pressure, which can easily damage the mold or finished product due to pressure overload. Summary of the Invention

[0005] The purpose of this invention is to provide a hot press for a buffer pad based on closed-loop compensation of mold temperature and its control method, so as to solve the problems mentioned in the background art, such as the inability to compensate for temperature difference in real time when the heat distribution is uneven, which easily leads to local temperature failure, resulting in the buffer pad's hardness and flatness not meeting the requirements after molding, and the inability to adjust the buffer amount according to the pressing pressure, which easily damages the mold or finished product due to pressure overload.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a buffer pad hot press based on mold temperature closed-loop compensation, comprising a supporting base plate, a rotating frame, and a placement tray. A telescopic damping column is fixedly connected to the bottom of the placement tray, and the bottom end of the telescopic damping column is fixedly connected to the top of the supporting base plate. The bottom of the rotating frame is fixedly connected to the top of the supporting base plate on the side away from the placement tray. A rotating clamping plate is rotatably connected to the inner side of the rotating frame. A hot press box is fixedly connected to the top of the rotating clamping plate. A hot press plate surface is fixedly connected to the surface of the hot press box. A temperature sensor is fixedly connected to the surface of the hot press plate surface. A transverse moving seat is slidably connected to the inner wall of the hot press box. A sliding rail is provided on the surface of the transverse moving seat. A longitudinal sliding block is slidably connected to the inner wall of the sliding rail. A heating block is fixedly connected to the surface of the longitudinal sliding block.

[0007] The present invention further illustrates that a transverse reciprocating screw is rotatably connected to both sides of the inner wall of the hot press box, the surface of the transverse reciprocating screw is threadedly connected to the inside of the transverse moving seat, and a limit support rod is slidably connected to the surface of the transverse moving seat on the upper and lower sides of the transverse reciprocating screw, and the two ends of the limit support rod are respectively fixedly connected to both sides of the inner wall of the hot press box.

[0008] The present invention further illustrates that one end of the transverse reciprocating screw passes through the hot press box and extends to one side of the hot press box. An upper motor cylinder is fixedly connected to one side of the hot press box. An upper motor is fixedly connected inside the upper motor cylinder. The output shaft of the upper motor is fixedly connected to one end of the transverse reciprocating screw located on one side of the hot press box via a coupling.

[0009] The present invention further illustrates that a built-in motor is fixedly connected to the top of the transverse moving seat and at the top of the sliding rail. The output shaft of the built-in motor is fixedly connected to a longitudinal reciprocating screw via a coupling. One end of the longitudinal reciprocating screw passes through the interior of the sliding rail. The longitudinal reciprocating screw is rotatably connected to the top and bottom of the inner wall of the sliding rail. The surface of the longitudinal reciprocating screw inside the sliding rail is threadedly connected to the interior of the longitudinal sliding block.

[0010] The present invention further illustrates that a lower motor cylinder is fixedly connected to one side of the rotating frame, a lower motor is fixedly connected inside the lower motor cylinder, the output shaft of the lower motor is fixedly connected to a rotating shaft via a coupling, one end of the rotating shaft passes through the rotating frame, the rotating shaft is rotatably connected to the interior of the rotating frame, and the surface of the rotating shaft is fixedly connected to the bottom of the rotating plate.

[0011] The present invention further describes that the placement tray has a sliding straight opening on the side near the rotating frame, a sliding retaining strip is slidably connected inside the sliding straight opening, a limiting retaining strip is slidably connected inside the sliding retaining strip, the two sides of the limiting retaining strip are fixedly connected to the two sides of the inner wall of the sliding straight opening, and a bidirectional lead screw is threadedly connected to one side of the limiting retaining strip.

[0012] The present invention further illustrates that the number of the sliding straight opening and the limiting strip is set to two, and the two sliding straight openings and the limiting strips are symmetrically arranged at both ends of the bidirectional screw. One end of the bidirectional screw passes through the placement plate and extends to one side of the placement plate. The end of the bidirectional screw located on the side of the placement plate is fixedly connected to an adjusting spline.

[0013] The present invention further describes that a threaded slide is slidably connected to the middle of the surface of the placement tray near the rotating frame. A rotating adjusting cylinder is threadedly connected to the threaded rod in the middle of the threaded slide. One side of the rotating adjusting cylinder is rotatably connected to the surface of the placement tray. One side of the threaded slide penetrates the placement tray and extends to the inner side of the placement tray. A pusher block is fixedly connected to one end of the threaded slide located inside the placement tray. Sliding push plates are slidably connected to both sides of the pusher block. A miniature locking rod is fixedly connected to the middle of the surface of the pusher block. The surface of the miniature locking rod is slidably connected to the interior of the sliding push plate. A limiting spring is sleeved on the surface of the miniature locking rod.

[0014] The present invention further illustrates that a protective cover is fixedly connected to the side of the placement tray near the rotating frame, and a controller is fixedly connected to the side of the rotating frame away from the lower motor cylinder.

[0015] This invention further illustrates a control method for a buffer pad hot press based on mold temperature closed-loop compensation, the control method comprising the following steps:

[0016] S1: System initialization, the controller drives the upper motor and the built-in motor to return the heating block to the center position, drives the lower motor to rotate the rotating plate to the open position, the bidirectional lead screw releases the clamp, and the threaded slide retracts;

[0017] S2: Workpiece clamping, the two-way lead screw rotates forward, the sliding clip moves towards the center under the guidance of the limit clip, clamping the buffer pad blank on the placement plate, and stops after clamping in place;

[0018] S3: Hot pressing mold closing, the controller drives the lower motor to rotate forward, the rotating plate drives the hot press box to flip downward, the hot press plate surface presses the workpiece, the telescopic damping column compresses and absorbs energy, and stops after the mold is closed in place;

[0019] S4: Temperature closed-loop compensation control. The temperature sensor collects the temperature data of the hot press plate surface in real time and sets the threshold. The controller calculates the temperature deviation of each zone. When the global temperature uniformity is greater than the allowable threshold, the controller finds the zone with the largest temperature difference, calculates the target coordinates of the heating block, drives the upper motor to move the horizontal moving seat, drives the built-in motor to move the longitudinal sliding block, and the heating block controls the zone to perform compensation heating. After compensation heating, the temperature is collected again and the above process is repeated until all compensation heating hot press is completed.

[0020] S5: Hot pressing and pressure holding. After the temperature reaches the target uniformity, the heating block stops moving and continues to maintain the temperature. After the pressure holding time is reached, proceed to the next step.

[0021] S6: Mold opening and ejection, the controller drives the lower motor to reverse to open the hot press box, and the rotating adjustment cylinder rotates to make the threaded slide move the pusher block to push the finished product out of the placement tray;

[0022] S7: Reset standby, all mechanisms return to their initial positions, waiting for the next work cycle.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention,

[0024] (1) By setting a temperature sensor to collect the temperature of the hot press plate in real time, and using a movable heating block to compensate for the temperature difference in the area, the traditional open-loop temperature control method cannot accurately sense the actual temperature of different areas of the mold and is difficult to compensate for the temperature difference in real time. It can ensure the overall temperature uniformity of the hot press plate and avoid the local temperature not meeting the standard, which would cause the hardness and flatness of the buffer pad to not meet the requirements after molding, thus reducing the output of defective products.

[0025] (2) The placement plate is elastically supported by the telescopic damping column. When the mold is closed and pressed, the telescopic damping column can compress and absorb energy according to the actual pressure. With the control logic of stopping the drive when the pressing is in place, it solves the problem that the traditional buffer structure cannot adjust the buffer amount according to the pressing pressure. It can avoid pressure overload damage to the mold or finished product, and improve the safety of equipment operation and the qualification rate of finished products.

[0026] (3) By setting a sliding sliding strip in conjunction with a two-way screw, it can be adapted to clamping buffer pad blanks of different sizes. With the push-out mechanism, the finished product can be ejected directly after the mold is opened, which improves the convenience of equipment operation, simplifies the material handling operation steps, and improves the overall processing efficiency. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1This is a first perspective view of a buffer pad hot press based on mold temperature closed-loop compensation according to an embodiment of the present invention; Figure 2 This is a second perspective view of a buffer pad hot press based on mold temperature closed-loop compensation according to an embodiment of the present invention; Figure 3 This is a front view of a buffer pad hot press based on mold temperature closed-loop compensation according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of an embodiment of the present invention; Figure 5 This is a perspective view of the rotating card plate connection structure in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the autoclave in an embodiment of the present invention; Figure 7 This is a perspective view of the structure at the top of the plate in an embodiment of the present invention; Figure 8 This is a perspective view of some structures in an embodiment of the present invention; Figure 9 This is an exploded view of the push card block connection structure in an embodiment of the present invention; Figure 10 This is a schematic diagram of the disk placement structure in an embodiment of the present invention; Figure 11 This is a schematic diagram of the lateral moving seat connection structure in an embodiment of the present invention; Figure 12 This is a flowchart of a buffer pad hot press control method based on mold temperature closed-loop compensation in an embodiment of the present invention;

[0028] In the diagram: 1. Support base plate; 2. Rotating frame; 3. Placement plate; 4. Telescopic damping column; 5. Rotating clamping plate; 6. Hot press box; 7. Hot press plate surface; 8. Temperature sensor; 9. Lateral moving seat; 10. Sliding rail; 11. Longitudinal sliding block; 12. Heating block; 13. Lateral reciprocating screw; 14. Limiting support rod; 15. Upper motor cylinder; 16. Upper motor; 17. Built-in motor; 18. Longitudinal reciprocating lead screw; 19. Lower motor cylinder; 20. Lower motor; 21. Rotating shaft; 22. Sliding straight end; 23. Sliding clamping bar; 24. Limiting clamping bar; 25. Bidirectional lead screw; 26. Adjusting spline; 27. Threaded slide; 28. Rotating adjusting cylinder; 29. ​​Pushing clamping bar block; 30. Sliding push plate; 31. Miniature clamping bar rod; 32. Limiting spring; 33. Protective cover; 34. Controller. Detailed Implementation

[0029] 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.

[0030] refer to Figure 1 - Figure 11 This invention provides a buffer pad hot press based on mold temperature closed-loop compensation, including a supporting base plate 1, a rotating frame 2, and a placement tray 3. A telescopic damping column 4 is fixedly connected to the bottom of the placement tray 3, and the bottom end of the telescopic damping column 4 is fixedly connected to the top of the supporting base plate 1. The bottom of the rotating frame 2 is fixedly connected to the side of the top of the supporting base plate 1 away from the placement tray 3. A rotating clamping plate 5 is rotatably connected to the inner side of the rotating frame 2. A hot press box 6 is fixedly connected to the top of the rotating clamping plate 5. A hot press plate surface 7 is fixedly connected to the surface of the hot press box 6. A temperature sensor 8 is fixedly connected to the surface of the hot press plate surface 7. A transverse moving seat 9 is slidably connected to the inner wall of the hot press box 6. A sliding rail 10 is provided on the surface of the transverse moving seat 9. A longitudinal sliding block 11 is slidably connected to the inner wall of the sliding rail 10. A heating block 12 is fixedly connected to the surface of the longitudinal sliding block 11.

[0031] Temperature sensor 8 collects the temperature of each area of ​​the hot press plate 7 in real time. After the temperature data is transmitted to controller 34, controller 34 calculates the temperature deviation of each area. When the temperature of a certain area is lower than the set qualified range, it drives the transverse moving seat 9 and the longitudinal sliding block 11 to move, which drives the heating block 12 to the corresponding position of the area with a low temperature, and supplements the heating of the area until the temperature of the area reaches the set range. Then, it compensates for the heating of the next area with a non-qualified temperature, and finally ensures that the temperature of the entire hot press plate 7 is uniform and meets the hot pressing requirements. During the mold closing process, as the hot press box 6 flips down to press, the telescopic damping column 4 is squeezed and will adaptively compress according to the actual pressure, absorbing excess impact force and avoiding excessive pressure from directly impacting and damaging the mold or buffer pad blank.

[0032] Furthermore, transverse reciprocating screws 13 are rotatably connected to both sides of the inner wall of the hot press chamber 6. The surface of the transverse reciprocating screws 13 is threadedly connected to the inside of the transverse moving seat 9. Limiting support rods 14 are slidably connected to the surface of the transverse moving seat 9 and located on the upper and lower sides of the transverse reciprocating screws 13. The two ends of the limiting support rods 14 are fixedly connected to both sides of the inner wall of the hot press chamber 6, respectively. One end of the transverse reciprocating screws 13 passes through the hot press chamber 6 and extends to one side of the hot press chamber 6. An upper motor cylinder 15 is fixedly connected to one side of the hot press chamber 6. An upper motor 16 is fixedly connected inside the upper motor cylinder 15. The output shaft of the top-mounted motor 16 is fixedly connected to one end of the transverse reciprocating screw 13 located on one side of the hot press box 6 via a coupling; a built-in motor 17 is fixedly connected to the top of the transverse moving seat 9 and at the top of the sliding rail 10. The output shaft of the built-in motor 17 is fixedly connected to a longitudinal reciprocating screw 18 via a coupling. One end of the longitudinal reciprocating screw 18 extends into the interior of the sliding rail 10. The longitudinal reciprocating screw 18 is rotatably connected to the top and bottom of the inner wall of the sliding rail 10. The surface of the longitudinal reciprocating screw 18 located inside the sliding rail 10 is threadedly connected to the interior of the longitudinal sliding block 11.

[0033] The upper motor cylinder 15 protects the upper motor 16. When the upper motor 16 is powered on, it drives the transverse reciprocating screw 13 to rotate. When the transverse reciprocating screw 13 rotates, it drives the transverse moving seat 9 to move along the axial direction of the transverse reciprocating screw 13 through thread engagement. With the help of the limit support rod 14, the movement of the transverse moving seat 9 is limited, ensuring that the movement of the transverse moving seat 9 is smooth and does not deflect. When the built-in motor 17 is powered on, it drives the longitudinal reciprocating screw 18 to rotate. When the longitudinal reciprocating screw 18 rotates, it drives the longitudinal sliding block 11 to move up and down along the sliding rail 10 through thread engagement, thereby accurately adjusting the corresponding position of the heating block 12 on the hot press plate 7 to achieve point compensation heating for the specified low temperature area.

[0034] Furthermore, a lower motor cylinder 19 is fixedly connected to one side of the rotating frame 2, and a lower motor 20 is fixedly connected inside the lower motor cylinder 19. The output shaft of the lower motor 20 is fixedly connected to a rotating shaft 21 through a coupling. One end of the rotating shaft 21 passes through the rotating frame 2, and the rotating shaft 21 is rotatably connected to the interior of the rotating frame 2. The surface of the rotating shaft 21 is fixedly connected to the bottom of the rotating plate 5.

[0035] The lower motor cylinder 19 protects the lower motor 20. After the lower motor 20 is powered on, it drives the rotating shaft 21 to rotate. The rotating shaft 21 drives the rotating plate 5 to rotate around its own rotating shaft 21 inside the rotating frame 2, thereby driving the hot press box 6 to flip as a whole, realizing automatic mold closing and mold opening operations.

[0036] Furthermore, a sliding straight opening 22 is provided on the side of the placement tray 3 near the rotating frame 2. A sliding retaining strip 23 is slidably connected inside the sliding straight opening 22. A limiting retaining strip 24 is slidably connected inside the sliding retaining strip 23. The two sides of the limiting retaining strip 24 are fixedly connected to the two sides of the inner wall of the sliding straight opening 22. A double-acting screw 25 is threadedly connected to one side of the limiting retaining strip 24. The number of sliding straight openings 22 and limiting retaining strips 24 is set to two, and the two sliding straight openings 22 and limiting retaining strips 24 are symmetrically arranged at both ends of the double-acting screw 25. One end of the double-acting screw 25 passes through the placement tray 3 and extends to one side of the placement tray 3. An adjusting spline 26 is fixedly connected to the end of the double-acting screw 25 located on one side of the placement tray 3. A threaded slide 27 is slidably connected to the middle of the surface of the placement tray 3 near the rotating frame 2. A rotating adjusting cylinder 28 is threadedly connected to the threaded rod in the middle of the threaded slide 27. One side of the rotating adjusting cylinder 28 is rotatably connected to the surface of the placement tray 3. One side of the threaded slide 27 passes through the placement tray 3 and extends to the inner side of the placement tray 3. A pusher bar block 29 is fixedly connected to one end of the threaded slide 27 located inside the placement tray 3. Sliding push plates 30 are slidably connected to both sides of the pusher bar block 29. A miniature bar rod 31 is fixedly connected to the middle of the surface of the pusher bar block 29. The surface of the miniature bar rod 31 is slidably connected to the inside of the sliding push plate 30. A limiting spring 32 is sleeved on the surface of the miniature bar rod 31.

[0037] The operator rotates the adjusting spline 26 to drive the bidirectional lead screw 25 to rotate. When the bidirectional lead screw 25 rotates, the two sliding clips 23 move towards the middle along the limiting clip 24 through the reverse threads at both ends, thereby clamping and fixing the buffer pad blanks of different sizes. After the hot pressing and mold opening are completed, the adjusting cylinder 28 is rotated to drive the threaded slide 27 to move forward through the thread engagement. The threaded slide 27 drives the pushing clip block 29 and the sliding push plate 30 to move forward, pushing the formed buffer pad out of the placement tray 3, making it convenient for the operator to pick up the material. When the buffer pad size is small, the sliding push plates 30 on both sides are blocked by the blank and slide relative to the limiting spring 32 along the micro clip rod 31, which adapts to the ejection operation of blanks of different sizes and ensures that the ejection operation is stable and reliable.

[0038] Furthermore, a protective cover 33 is fixedly connected to the side of the placement plate 3 near the rotating frame 2, and a controller 34 is fixedly connected to the side of the rotating frame 2 away from the lower motor cylinder 19.

[0039] The protective cover 33 protects the ejection mechanism inside the placement tray 3 to prevent processing debris from entering the sliding gap and affecting the normal operation of the mechanism. The controller 34 can receive temperature data collected by the temperature sensor 8 and output control signals according to the temperature deviation to control the operation of the upper motor 16, the inner motor 17 and the lower motor 20, realize closed-loop temperature compensation control, and ensure the automation of the entire equipment operation.

[0040] A control method for a buffer pad hot press based on mold temperature closed-loop compensation, the control method includes the following steps:

[0041] S1: System initialization, controller 34 drives the upper motor 16 and the built-in motor 17 to return the heating block 12 to the center position, drives the lower motor 20 to rotate the rotating plate 5 to the open position, the bidirectional screw 25 releases the clamp, and the threaded slide 27 retracts.

[0042] S2: Workpiece clamping, the bidirectional lead screw 25 rotates forward, the sliding clamp 23 moves towards the center under the guidance of the limit clamp 24, clamping the buffer pad blank on the placement plate 3, and stops after clamping in place;

[0043] S3: Hot pressing mold closing, controller 34 drives the lower motor 20 to rotate forward, rotating the platen 5 to drive the hot press box 6 to flip downward, the hot press plate 7 presses the workpiece, the telescopic damping column 4 compresses and absorbs energy, and stops after the mold is closed in place;

[0044] S4: Temperature closed-loop compensation control. Temperature sensor 8 collects temperature data of hot press plate 7 in real time and sets a threshold. Controller 34 calculates the temperature deviation of each zone. When the global temperature uniformity is greater than the allowable threshold, controller 34 finds the zone with the largest temperature difference, calculates the target coordinates of heating block 12, and drives the upper motor 16 to move the transverse moving seat 9 and the built-in motor 17 to move the longitudinal sliding block 11. Heating block 12 controls and compensates the heating of the zone. After the compensation heating, the temperature is collected again and the above process is repeated until all compensation heating and hot pressing are completed.

[0045] S5: Hot pressing and pressure holding. After the temperature reaches the standard uniformity, the heating block 12 stops moving and continues to maintain the temperature. After the pressure holding time is reached, proceed to the next step.

[0046] S6: Mold opening and ejection, controller 34 drives the lower motor 20 to reverse so that the hot press box 6 is opened, and the rotating adjusting cylinder 28 rotates forward so that the threaded slide 27 drives the pusher block 29 to push the finished product out of the placement tray 3;

[0047] S7: Reset standby, all mechanisms return to their initial positions, waiting for the next work cycle.

[0048] Working principle: Because most hot presses in the current technology adopt an open-loop temperature control method, they rely solely on the preset power of the heating module for heating. This makes it impossible to accurately sense the actual temperature of different areas of the mold. When the mold experiences uneven heat distribution due to ambient temperature fluctuations or continuous operation, it cannot compensate for the temperature difference in real time. This can easily lead to local temperature substandard conditions, resulting in the buffer pad failing to meet the requirements for hardness and flatness after molding, thus producing defective products. Furthermore, the buffer structure of traditional hot presses is mostly fixed and cannot be adjusted according to the pressing pressure. This can easily damage the mold or finished product due to pressure overload. During operation, temperature sensor 8 collects real-time temperature data from various areas of the hot press plate 7. The temperature data is transmitted to controller 34, which calculates the temperature deviation of each area. When the temperature of a certain area falls below the set acceptable range, controller 34 controls the transverse moving seat 9 and the longitudinal sliding block 11 to move, causing heating block 12 to move to the corresponding position of the low-temperature area for supplementary heating until the temperature reaches the set range. Then, the next area with an unacceptable temperature is compensated for with heating, ultimately ensuring that the temperature of the entire hot press plate 7 is uniform and meets the hot pressing requirements. After temperature compensation, the pressure holding stage begins, maintaining the temperature for the set duration to complete the hot pressing process. During mold closing, as the hot press box 6 flips downwards for pressing, the telescopic damping column 4 is compressed adaptively according to the actual pressure, absorbing excess impact force and preventing excessive pressure from directly damaging the mold or buffer pad blank. During clamping, the operator can adjust the distance between the two sliding clips 23 according to the actual size of the buffer pad blank, so that blanks of different sizes can be clamped stably. After the mold is opened, the ejection mechanism can automatically push the finished product out of the placement tray 3, simplifying the material handling operation. After the processing is completed, all mechanisms automatically reset and wait for the next processing cycle. The entire processing process relies on temperature closed-loop control to achieve automatic temperature compensation, which has higher temperature control accuracy and more stable finished product quality. At the same time, the equipment has stronger adaptability, more convenient operation, and higher processing efficiency.

[0049] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0050] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A buffer pad hot press based on mold temperature closed-loop compensation, comprising a supporting base plate (1), a rotating frame (2), and a placement tray (3), characterized in that: The bottom of the placement plate (3) is fixedly connected to a telescopic damping column (4), the bottom end of the telescopic damping column (4) is fixedly connected to the top of the support base plate (1), the bottom of the rotating frame (2) is fixedly connected to the side of the top of the support base plate (1) away from the placement plate (3), the inner side of the rotating frame (2) is rotatably connected to a rotating plate (5), the top of the rotating plate (5) is fixedly connected to a hot press box (6), the surface of the hot press box (6) is fixedly connected to a hot press plate surface (7), the surface of the hot press plate surface (7) is fixedly connected to a temperature sensor (8), the inner wall of the hot press box (6) is slidably connected to a transverse moving seat (9), the surface of the transverse moving seat (9) is provided with a sliding rail (10), the inner wall of the sliding rail (10) is slidably connected to a longitudinal sliding block (11), and the surface of the longitudinal sliding block (11) is fixedly connected to a heating block (12).

2. The buffer pad hot press based on mold temperature closed-loop compensation according to claim 1, characterized in that: The inner walls of the hot press box (6) are rotatably connected to the two sides of the transverse reciprocating screw (13). The surface of the transverse reciprocating screw (13) is threadedly connected to the inside of the transverse moving seat (9). The surface of the transverse moving seat (9) and the upper and lower sides of the transverse reciprocating screw (13) are slidably connected to the limit support rod (14). The two ends of the limit support rod (14) are fixedly connected to the two sides of the inner wall of the hot press box (6).

3. A buffer pad hot press based on mold temperature closed-loop compensation according to claim 2, characterized in that: One end of the transverse reciprocating screw (13) passes through the hot press box (6) and extends to one side of the hot press box (6). An upper motor cylinder (15) is fixedly connected to one side of the hot press box (6). An upper motor (16) is fixedly connected inside the upper motor cylinder (15). The output shaft of the upper motor (16) is fixedly connected to one end of the transverse reciprocating screw (13) located on one side of the hot press box (6) through a coupling.

4. A buffer pad hot press based on mold temperature closed-loop compensation according to claim 1, characterized in that: A built-in motor (17) is fixedly connected to the top of the transverse moving seat (9) and at the top of the sliding rail (10). The output shaft of the built-in motor (17) is fixedly connected to a longitudinal reciprocating screw (18) via a coupling. One end of the longitudinal reciprocating screw (18) extends into the interior of the sliding rail (10). The longitudinal reciprocating screw (18) is rotatably connected to the top and bottom of the inner wall of the sliding rail (10). The surface of the longitudinal reciprocating screw (18) inside the sliding rail (10) is threadedly connected to the interior of the longitudinal sliding block (11).

5. A buffer pad hot press based on mold temperature closed-loop compensation according to claim 1, characterized in that: A lower motor cylinder (19) is fixedly connected to one side of the rotating frame (2). A lower motor (20) is fixedly connected inside the lower motor cylinder (19). The output shaft of the lower motor (20) is fixedly connected to a rotating shaft (21) via a coupling. One end of the rotating shaft (21) passes through the rotating frame (2). The rotating shaft (21) is rotatably connected to the interior of the rotating frame (2). The surface of the rotating shaft (21) is fixedly connected to the bottom of the rotating plate (5).

6. A buffer pad hot press based on mold temperature closed-loop compensation according to claim 1, characterized in that: The placement tray (3) has a sliding straight opening (22) on the side near the rotating frame (2). A sliding retaining strip (23) is slidably connected inside the sliding straight opening (22). A limiting retaining strip (24) is slidably connected inside the sliding retaining strip (23). The two sides of the limiting retaining strip (24) are fixedly connected to the two sides of the inner wall of the sliding straight opening (22). A two-way screw rod (25) is threadedly connected to one side of the limiting retaining strip (24).

7. A buffer pad hot press based on mold temperature closed-loop compensation according to claim 6, characterized in that: The number of the sliding straight opening (22) and the limiting strip (24) is set to two, and the two sliding straight openings (22) and the limiting strip (24) are symmetrically arranged at both ends of the bidirectional screw (25). One end of the bidirectional screw (25) passes through the placement plate (3) and extends to one side of the placement plate (3). The end of the bidirectional screw (25) located on one side of the placement plate (3) is fixedly connected to an adjusting spline (26).

8. A buffer pad hot press based on mold temperature closed-loop compensation according to claim 6, characterized in that: A threaded slide (27) is slidably connected to the middle of the surface of the placement tray (3) near the rotating frame (2). A rotating adjusting cylinder (28) is threadedly connected to the threaded rod in the middle of the threaded slide (27). One side of the rotating adjusting cylinder (28) is rotatably connected to the surface of the placement tray (3). One side of the threaded slide (27) passes through the placement tray (3) and extends to the inner side of the placement tray (3). A pusher block (29) is fixedly connected to one end of the threaded slide (27) located inside the placement tray (3). A sliding push plate (30) is slidably connected to both sides of the pusher block (29). A miniature clip rod (31) is fixedly connected to the middle of the surface of the pusher block (29). The surface of the miniature clip rod (31) is slidably connected to the inside of the sliding push plate (30). A limiting spring (32) is sleeved on the surface of the miniature clip rod (31).

9. A buffer pad hot press based on mold temperature closed-loop compensation according to claim 1, characterized in that: A protective cover (33) is fixedly connected to the side of the placement plate (3) near the rotating frame (2), and a controller (34) is fixedly connected to the side of the rotating frame (2) away from the lower motor cylinder (19).

10. A control method for a buffer pad hot press based on mold temperature closed-loop compensation as described in any one of claims 1-9, characterized in that: The control method includes the following steps: S1: System initialization, the controller (34) drives the upper motor (16) and the built-in motor (17) to return the heating block (12) to the middle position, drives the lower motor (20) to rotate the rotating plate (5) to the open position, the bidirectional screw (25) releases the clamp, and the threaded slide (27) retracts; S2: The workpiece is clamped. The double-acting screw (25) rotates forward. The sliding clip (23) moves towards the center under the guidance of the limit clip (24) to clamp the buffer pad blank on the placement plate (3). The clamping stops after it is in place. S3: Hot pressing mold closing, the controller (34) drives the lower motor (20) to rotate forward, the rotating platen (5) drives the hot press box (6) to flip downward, the hot press platen (7) presses the workpiece, the telescopic damping column (4) compresses and absorbs energy, and stops after the mold is closed; S4: Temperature closed-loop compensation control, temperature sensor (8) collects temperature data of hot press plate (7) in real time and sets threshold, controller (34) calculates temperature deviation of each zone, when global temperature uniformity is greater than the allowable threshold, controller (34) finds the zone with the largest temperature difference, calculates target coordinates of heating block (12), controller (34) drives upper motor (16) to move transverse moving seat (9), drives built-in motor (17) to move longitudinal sliding block (11), heating block (12) controls and compensates heating of the zone, temperature is collected again after compensation heating, repeat the above process until all compensation heating hot press is completed; S5: Hot pressing and pressure holding. After the temperature reaches the standard, the heating block (12) stops moving and continues to maintain the temperature. After the pressure holding time is reached, proceed to the next step. S6: Open the mold and eject. The controller (34) drives the lower motor (20) to reverse so that the hot press box (6) is opened. The rotating adjustment cylinder (28) rotates forward so that the threaded slide (27) drives the pusher block (29) to push the finished product out of the placement tray (3). S7: Reset standby, all mechanisms return to their initial positions, waiting for the next work cycle.

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