Hot-pressing device with temperature control structure and temperature control method

Abstract

The application discloses a hot-pressing device with a temperature control structure and a temperature control method, and belongs to the technical field of plywood processing. The hot-pressing device comprises a rack, and hot-pressing plates are uniformly arranged in the rack. The temperature control mechanism is arranged at the end of the rack. In the process of temperature rising, the movement of the piston is controlled according to the temperature difference and the change of the air pressure at the two ends of the first hollow pipe, the opening size of the shunt pipe is increased, the steam entering amount is increased, the hot-pressing plate is rapidly heated, after the temperature rising is completed, the temperature difference at the two ends of the first hollow pipe is reduced, the air pressure area is stable, the tension spring controls the piston to reset, the shunt pipe is stably supplied with air, and when the steam discharged from the collecting pipe is too high, the diaphragm can be controlled to move towards the inside of the shunt pipe due to the deformation of the bimetallic strip, the air intake amount is reduced, and the temperature is prevented from being too high. Therefore, the device can automatically control the temperature during use, the functionality of the device is improved, and the hot-pressing quality and speed are ensured.

Description

Technical Field

[0001] This invention relates to a hot pressing device, and more particularly to a hot pressing device with a temperature control structure. This invention also relates to a temperature control method, and more particularly to a temperature control method for a hot pressing device with a temperature control structure, belonging to the field of plywood processing technology. Background Technology

[0002] The plywood hot pressing device is a key piece of equipment in the plywood production process. It is mainly used to hot-press assembled veneers under specific temperature and pressure to form plywood with a certain strength and dimensional stability. This device typically consists of a frame, heating system, pressurizing system, and control system. The heating system can use steam, electricity, or heat transfer oil to provide a heat source, ensuring the hot pressing plate reaches the appropriate temperature, allowing the adhesive in the veneer to melt and penetrate between the wood fibers. The pressurizing system applies pressure to the veneer using hydraulic or mechanical means, ensuring the veneer layers are tightly bonded. The control system precisely controls parameters such as temperature, pressure, and time to guarantee the stability of the hot pressing process and the quality of the plywood. Its efficient hot pressing process effectively improves production efficiency and enhances the bonding strength and surface quality of the plywood, making it an indispensable piece of equipment in the industrial production of plywood.

[0003] Currently, in the hot pressing process, when steam is used as a heat source, the device cannot achieve automatic temperature control. When the maximum temperature warning is reached, it is necessary to manually stop the gas and pressure, and then increase the pressure and gas again after the temperature drops. This semi-automatic operation affects the temperature control effect during use. In addition, during the hot pressing and separation process, the hot pressing plates need to be sequentially attached and separated, which prolongs the feeding, pressing and unloading time. Furthermore, during the feeding and hot pressing process, the plate cannot be self-adjusted, which may cause some plate to be located outside the hot pressing plate, affecting the overall molding effect.

[0004] To address these issues, a hot pressing device with a temperature control structure and a temperature control method were designed. Summary of the Invention

[0005] The main objective of this invention is to provide a hot pressing device and method with a temperature control structure. A temperature control mechanism, consisting of a first hollow tube, a steam exhaust pipe, a steam inlet pipe, a manifold, a branch pipe, a piston, a second hollow tube, a bimetallic strip, a partition, and a tension spring, is provided at the end of the frame. During the heating process, the mechanism controls the piston's movement based on the temperature difference and pressure changes at both ends of the first hollow tube, increasing the opening size of the branch pipe and improving the steam intake for rapid heating of the hot pressing plate. After heating is complete, the temperature difference between the two ends of the first hollow tube decreases, the pressure range stabilizes, and the tension spring controls the piston to return to its original position, allowing stable steam intake through the branch pipe. Furthermore, when the steam output from the manifold is too high, the deformation of the bimetallic strip controls the partition to move towards the inside of the branch pipe, reducing the intake and preventing overheating. This allows the device to automatically adjust the temperature during use, improving its functionality and ensuring the quality and speed of hot pressing. A connecting mechanism consisting of a linear slide, a first slider, a cross rod, a shaft, a limit block, and a vertical rod is installed between the plates. This allows the device to synchronously control all hot press plates during use, eliminating the "waiting time layer by layer" in sequential operations and improving processing speed. Synchronous control also allows all press plates to enter the working state at the same time, resulting in a more balanced load on the motor / hydraulic system and higher energy efficiency. A pushing mechanism consisting of a horizontal plate, a vertical groove, a trapezoidal stop, a through groove, a trapezoidal insert, a first spring, a push plate, a slide rod, a strip groove, a second slider, a second spring, a connecting rod, and a rectangular sliding hole separates the horizontal plate from the hot press plate during the loading of the sheet material. During the extrusion process, because the connecting rod is connected to the first slider, it can simultaneously control the two sets of horizontal plates to move towards each other and control the push plate to move upward. The push plate pushes the sheet material protruding from the outside of the hot press plate into the hot press plate, ensuring that the sheet material is completely extruded and ensuring the forming effect of the sheet material.

[0006] The objective of this invention can be achieved by adopting the following technical solution:

[0007] A hot pressing device with a temperature control structure includes a frame, in which hot pressing plates are evenly arranged. A hydraulic cylinder for controlling the lifting and lowering of the hot pressing plates is provided at the bottom of the frame. A connecting mechanism is provided between the ends of adjacent hot pressing plates. A pushing mechanism is symmetrically provided on the sides of the hot pressing plates. A temperature control mechanism that communicates with the air inlet and outlet holes at the ends of the hot pressing plates is provided at the end of the frame.

[0008] The temperature control mechanism includes a first hollow tube, a steam exhaust pipe, a steam inlet pipe, a manifold, a branch pipe, a piston, a second hollow tube, a baffle plate, and a bimetallic strip. The first hollow tube is fixed to the end of the frame. A steam exhaust pipe is installed at one end of the top of the first hollow tube, and a steam inlet pipe is installed at the other end of the top of the first hollow tube. A manifold is located at the bottom of the first hollow tube near the steam exhaust pipe, and the manifold is connected to the exhaust port of the hot press plate through a pipe. A branch pipe is located at the bottom of the first hollow tube near the steam inlet pipe, and the branch pipe is connected to the hot press plate through a conduit. The air inlet of the pressure plate is open. A piston is slidably installed inside the first hollow tube. The piston is located in the middle of the first hollow tube and blocks the top of the split tube. A tension spring is provided between the end of the piston near the steam inlet pipe and the end of the first hollow tube. A second hollow tube is provided at the bottom of the first hollow tube. The interior of the second hollow tube is open to the manifold. A baffle is slidably installed at the end of the second hollow tube near the split tube. The baffle slides into the interior of the split tube. A bimetallic strip is vertically installed at the top of the second hollow tube. The bimetallic strip slides through the baffle.

[0009] Preferably, the connecting mechanism includes a linear slide, a first slider, a cross rod, a shaft, and a center limiting component. The linear slide is symmetrically opened at the ends of the hot press plate. The first slider is slidably arranged inside the linear slide. A cross rod is hinged between the first sliders at adjacent ends of the hot press plate. A shaft is provided at the center of the cross rod. A center limiting component is provided at the end of the frame to limit the cross rod.

[0010] Preferably, the center limiting component includes a limiting block and a vertical rod. The limiting block is rotatably mounted on the end of the shaft, and the vertical rod is vertically set at both ends of the frame. The limiting block and the vertical rod are slidably connected.

[0011] Preferably, the pushing mechanism includes a horizontal plate, vertical grooves, trapezoidal blocks, a lifting component, a spacing adjustment component, and an elastic extrusion component. The horizontal plate is horizontally arranged on both sides of the hot press plate, and the height of the horizontal plate is the same as the thickness of the hot press plate. Vertical grooves are vertically opened on the inner side of the horizontal plate, and trapezoidal blocks are vertically slidably arranged inside the vertical grooves. The side of the hot press plate is provided with a lifting component to control the sliding of the trapezoidal blocks. A spacing adjustment component is provided between the two sets of horizontal plates on the side of the hot press plate. An elastic extrusion component is provided on the side of the trapezoidal blocks closest to the hot press plate.

[0012] Preferably, the elastic compression assembly includes a first spring, a push plate, and a slide rod. The push plate is arranged parallel to the side of the trapezoidal block near the hot press plate. The first spring is provided between the push plate and the trapezoidal block. The slide rod is fixed on the push plate and passes through the inside of the first spring and is slidably connected to the trapezoidal block.

[0013] Preferably, the lifting assembly includes a through slot and a trapezoidal insert. The through slot is opened at the bottom of the vertical slot and passes through the horizontal plate. Trapezoidal inserts are fixed at the positions of the hot press plate corresponding to the through slot. The inclined surface at the end of the trapezoidal insert fits with the inclined surface at the bottom of the trapezoidal stop.

[0014] Preferably, the ends of the trapezoidal blocks are vertically provided with strip grooves, the top of the inner side of each strip groove is slidably provided with a second slider, the bottom of the second slider is provided with a second spring between the bottom of the second slider and the bottom of the strip groove, and the end of the second slider is fixedly connected to the side of the vertical groove.

[0015] Preferably, the spacing adjustment assembly includes a connecting rod and a rectangular sliding hole. The connecting rod is fixed on the opposite side of the first slider. The end of the connecting rod passes through the other first slider and is slidably connected to the other first slider. The first slider is provided with a rectangular sliding hole for the connecting rod to pass through. The end of the connecting rod is fixedly connected to the end of the cross plate.

[0016] Preferably, a ball bearing is rotatably mounted on the inclined surface at the bottom of the trapezoidal stop, and the ball bearing is located at both ends of the inclined surface.

[0017] This invention also provides a temperature control method for a hot pressing device with a temperature control structure, comprising the following steps:

[0018] Step 1: When the hot press plate is preheated, steam enters from the inside of the steam inlet pipe, passes through one end of the first hollow pipe and enters the inside of the distribution pipe, and then is evenly distributed into the inside of multiple sets of hot press plates for heating, and then exits from the inside of the hot press plate, and then passes through the manifold, the second hollow pipe and the other end of the first hollow pipe and finally exits from the inside of the steam outlet pipe.

[0019] Step 2: After the steam enters the interior of the first hollow tube through the steam inlet pipe, due to the temperature difference between the two ends of the first hollow tube, the pressure at the end near the steam inlet pipe is greater, which will cause some expansion. Control the piston to slide towards the end of the steam inlet pipe, increase the area of ​​the opening at the top of the split pipe, and thus accelerate the preheating of the hot platen.

[0020] Step 3: After the hot platen finishes heating up, the temperature difference between the two ends of the first hollow tube decreases, and the pressure difference decreases. The tension spring pulls the piston back to its original position, and steam enters the interior of the distributor tube stably.

[0021] Step 4: When the temperature discharged from the manifold is high and about to reach the set threshold, the bimetallic strip bends and deforms, controlling the baffle to move towards the inside of the split pipe, reducing the air intake of the split pipe, thereby regulating the temperature and preventing the hot press plate from overheating.

[0022] The beneficial effects of this invention are as follows:

[0023] The hot pressing device and temperature control method with a temperature control structure provided by this invention, through a temperature control mechanism composed of a first hollow tube, a steam discharge pipe, a steam inlet pipe, a manifold, a branch pipe, a piston, a second hollow tube, a bimetallic strip, a partition, and a tension spring at the end of the frame, can control the movement of the piston during the heating process according to the temperature difference and air pressure changes at both ends of the first hollow tube, increasing the opening size of the branch pipe, increasing the amount of steam entering, and rapidly heating the hot pressing plate. After the heating is completed, the temperature difference at both ends of the first hollow tube decreases, the air pressure area stabilizes, and the tension spring controls the piston to return to its original position, allowing stable air intake through the branch pipe. In addition, when the steam discharged from the manifold is too high, due to the deformation of the bimetallic strip, the partition can be controlled to move towards the inside of the branch pipe, reducing the amount of air entering, thereby avoiding excessive temperature. This allows the device to automatically adjust the temperature during use, improving the functionality of the device and ensuring the quality and speed of hot pressing.

[0024] By setting a connecting mechanism consisting of a linear slide, a first slider, a cross rod, a shaft, a limit block, and a vertical rod between the hot press plates, the device can achieve simultaneous action of all hot press plates by using the pressurization system during use. This eliminates the time of "waiting layer by layer" in sequential actions, improves the processing speed, and allows all press plates to enter the working state at the same time. The load on the motor / hydraulic system is more balanced, and the energy efficiency is higher.

[0025] The pushing mechanism, composed of a horizontal plate, vertical groove, trapezoidal stop, through groove, trapezoidal insert, first spring, push plate, slide rod, strip groove, second slider, second spring, connecting rod, and rectangular sliding hole, separates the horizontal plate from the hot press plate during the loading of the sheet material. During the extrusion process, because the connecting rod is connected to the first slider, it can simultaneously control the two sets of horizontal plates to move towards each other and control the push plate to move upward. The push plate is used to push the sheet material protruding from the outside of the hot press plate into the inside of the hot press plate, ensuring that the sheet material is completely extruded and ensuring the forming effect of the sheet material. Attached Figure Description

[0026] Figure 1 This is a front view of a preferred embodiment of the hot pressing device and temperature control method with a temperature control structure of the present invention;

[0027] Figure 2 This is a cross-sectional view of the temperature control mechanism in a preferred embodiment of the hot pressing device and temperature control method with temperature control structure of the present invention.

[0028] Figure 3 This is a structural diagram of the outer side of the hot press plate in a preferred embodiment of the hot press device and temperature control method with temperature control structure of the present invention;

[0029] Figure 4 This is a preferred embodiment of the hot pressing device and temperature control method with temperature control structure of the present invention. Figure 1 Enlarged view of point A in the middle;

[0030] Figure 5 This is a structural diagram of a hot press plate in a preferred embodiment of the hot press device and temperature control method with a temperature control structure of the present invention;

[0031] Figure 6 This is a preferred embodiment of the hot pressing device and temperature control method with temperature control structure of the present invention. Figure 1 Enlarged view at point B in the middle;

[0032] Figure 7 This is an exploded view of the pushing mechanism of a preferred embodiment of the hot pressing device and temperature control method with temperature control structure of the present invention;

[0033] Figure 8 This is a diagram of a trapezoidal block in a preferred embodiment of the hot pressing device and temperature control method with a temperature control structure of the present invention.

[0034] In the diagram: 1. Frame; 2. Hot press plate;

[0035] 3. Connecting mechanism; 301. Linear slide; 302. First slider; 303. Cross rod; 304. Shaft; 305. Limiting block; 306. Vertical rod;

[0036] 4. Pushing mechanism; 401. Horizontal plate; 402. Vertical groove; 403. Trapezoidal stop; 404. Through groove; 405. Trapezoidal insert; 406. First spring; 407. Push plate; 408. Sliding rod; 409. Strip groove; 410. Second slider; 411. Second spring; 412. Connecting rod; 413. Rectangular sliding hole;

[0037] 5. Temperature control mechanism; 501. First hollow tube; 502. Steam exhaust pipe; 503. Steam inlet pipe; 504. Manifold; 505. Diverter pipe; 506. Piston; 507. Second hollow tube; 508. Baffle plate; 509. Bimetallic strip; 510. Tension spring. Detailed Implementation

[0038] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0039] like Figures 1-8 As shown, this embodiment provides a hot pressing device with a temperature control structure, including a frame 1, hot pressing plates 2 are evenly arranged inside the frame 1, a hydraulic cylinder for controlling the lifting and lowering of the hot pressing plates 2 is provided at the bottom of the frame 1, a connecting mechanism 3 is provided between the ends of adjacent hot pressing plates 2, a pushing mechanism 4 is symmetrically provided on the side of the hot pressing plates 2, and a temperature control mechanism 5 is provided at the end of the frame 1 that is connected to the air inlet and outlet holes at the end of the hot pressing plates 2.

[0040] The temperature control mechanism 5 includes a first hollow tube 501, a steam exhaust pipe 502, a steam inlet pipe 503, a manifold 504, a branch pipe 505, a piston 506, a second hollow tube 507, a partition plate 508, and a bimetallic strip 509. The first hollow tube 501 is fixed to the end of the frame 1. The steam exhaust pipe 502 is installed at one end of the top of the first hollow tube 501, and the steam inlet pipe 503 is installed at the other end of the top of the first hollow tube 501. The manifold 504 is located at the bottom of the first hollow tube 501 near the steam exhaust pipe 502. The manifold 504 is connected to the exhaust port of the hot press plate 2 through a pipe. The bottom of the first hollow tube 501 is near the steam inlet pipe 503. One end is provided with a diversion pipe 505, which is connected to the air inlet of the hot press plate 2 through a conduit. The diversion pipe 505 has equidistantly distributed guide holes (8mm diameter, number = number of hot press plates) inside. Each guide hole corresponds to the air inlet of the hot press plate 2. The spacing of the guide holes is evenly distributed according to the layout of the hot press plate 2 to ensure that the flow deviation is ≤5%. A piston 506 is slidably installed inside the first hollow tube 501. The piston 506 has an annular groove on its outer circumference, into which a high-temperature resistant silicone sealing ring with a hardness of 60±5 Shore A is embedded. The sealing ring is interference-fitted with the inner wall of the first hollow tube 501 with an interference amount of 0.2mm to ensure steam sealing. The piston 506 is located in the middle of the first hollow tube 501. The top of the diversion pipe 505 is blocked at the location. A tension spring 510 is provided between the end of the piston 506 near the steam inlet pipe 503 and the end of the first hollow pipe 501. The temperature of the area of ​​the first hollow pipe 501 on the steam inlet pipe 503 side is T1, and the temperature on the steam outlet pipe 502 side is T2. When the initial temperature difference ΔT = T1 - T2 ≥ 50℃, the gas expansion pushes the piston 506 to move and stretches the tension spring 510. The stroke of the piston 506 is L = 0.1 × ΔT (mm) until the open area of ​​the diversion pipe 505 increases to 1.5 times the initial size. When ΔT ≤ 10℃, the elastic coefficient k of the tension spring 510 is 5 N / mm, pulling the piston 506 back to its original position. A second hollow tube 507 is provided at the bottom of tube 501. The interior of the second hollow tube 507 is connected to the manifold 504. A baffle 508 is slidably installed at one end of the second hollow tube 507 near the branch tube 505. The baffle 508 extends slidably into the interior of the branch tube 505. A bimetallic strip 509 is vertically installed at the top inside the second hollow tube 507. The bimetallic strip 509 slides through the baffle 508. The aperture of the baffle 508 is 0.5 mm larger than the thickness of the bimetallic strip 509, allowing it to bend freely. A copper-steel composite bimetallic strip is used, with the steel layer facing the branch tube 505 and the copper layer facing the interior of the second hollow tube 507. The expansion coefficient of copper (17 × 10⁻⁶) is utilized. -6 / ℃) is greater than steel (12×10 -6 Due to the characteristic of (°C), when the temperature exceeds the set threshold, the bimetallic strip 509 bends toward the steel layer.

[0041] General working principle: In use, first place the sheet material between the hot press plates 2, then use the hydraulic cylinder to control the bottom hot press plate 2 to move upward. Due to the use of the connecting mechanism 3, multiple sets of hot press plates 2 can move simultaneously, moving upward and quickly bonding together. During the bonding process, the pushing mechanism is used to push the sheet material protruding from the side towards the hot press plates 2, ensuring that the sheet material can be completely squeezed. During the process of squeezing and bonding the sheet material, steam enters from the steam inlet pipe 503, passes through one end of the first hollow pipe 501 and enters the inside of the diversion pipe 505, and then is evenly distributed into the inside of multiple sets of hot press plates 2 for heating, and then exits from the inside of the hot press plates 2, then passes through the manifold 504, the second hollow pipe 507 and the other end of the first hollow pipe 501 and finally exits from the inside of the steam outlet pipe 502. Steam enters from the steam inlet pipe 503 into the first hollow pipe. After entering the interior of 501, due to the temperature difference between the two ends of the first hollow tube 501, the pressure at the end near the steam inlet pipe 503 is greater, causing some expansion. The control piston 506 slides towards the end of the steam inlet pipe 503, increasing the area of ​​the opening at the top of the diversion pipe 505, thereby accelerating the preheating of the hot press plate 2. After the hot press plate 2 finishes heating up, the temperature difference between the two ends of the first hollow tube 501 decreases, and the pressure difference decreases. The tension spring 510 pulls the piston 506 to reset, and steam enters the interior of the diversion pipe 505 stably. When the temperature discharged from the manifold 504 is high and about to reach the set threshold, the bimetallic strip 509 bends and deforms, controlling the partition 508 to move towards the interior of the diversion pipe 505, reducing the air intake of the diversion pipe 505, thereby regulating the temperature and preventing the hot press plate 2 from overheating. After the hot pressing is completed, the hot press plate 2 is separated, and the plate is pushed out.

[0042] In this embodiment, the connecting mechanism 3 includes a linear slide 301, a first slider 302, a crossbar 303, a shaft 304, and a center limiting component. The linear slide 301 is symmetrically opened at the ends of the hot press plate 2. The first slider 302 is slidably arranged inside the linear slide 301. The crossbar 303 is hinged between the first sliders 302 at the ends of adjacent hot press plates 2. The two ends of the crossbar 303 are hinged to the first sliders 302 by pins (10mm in diameter). The pins are provided with elastic retaining rings to prevent them from falling off. The angle between the crossbars 303 of adjacent hot press plates 2 is initially 90°, and the angle changes within the range of 60°-120° during lifting. A shaft 304 is provided at the center of the crossbar 303. A center limiting component is provided at the end of the frame 1 to limit the crossbar 303.

[0043] Local working principle: In the initial state, the distance between the two sets of first sliders 302 at the end of the hot press plate 2 is the shortest. During the process of controlling the upward movement of the hot press plate 2, due to the linkage of the cross rod 303, the first sliders 302 at the end of the hot press plate 2 move in the opposite direction, the distance increases, and the hot press plate 2 moves synchronously, quickly pressing and separating.

[0044] In this embodiment, the center limiting component includes a limiting block 305 and a vertical rod 306. The limiting block 305 is rotatably mounted on the end of the shaft 304, and the vertical rod 306 is vertically arranged at both ends of the frame 1. The limiting block 305 and the vertical rod 306 are slidably connected.

[0045] Local working principle: During the process of controlling the lifting and lowering of the hot press plate 2, the presence of the vertical rod 306 can limit the cross rod 303 and prevent the cross rod 303 from sliding horizontally.

[0046] In this embodiment, the pushing mechanism 4 includes a horizontal plate 401, a vertical groove 402, a trapezoidal stop 403, a lifting component, a spacing adjustment component, and an elastic extrusion component. The horizontal plate 401 is horizontally arranged on both sides of the hot press plate 2, and the height of the horizontal plate 401 is the same as the thickness of the hot press plate 2. The inner side of the horizontal plate 401 is vertically provided with a vertical groove 402, and the trapezoidal stop 403 is vertically slidably arranged inside the vertical groove 402. The side of the hot press plate 2 is provided with a lifting component to control the sliding of the trapezoidal stop 403. A spacing adjustment component is provided between the two sets of horizontal plates 401 on the side of the hot press plate 2. The side of the trapezoidal stop 403 near the hot press plate 2 is provided with an elastic extrusion component.

[0047] Local working principle: If the sheet material protrudes outside the hot press plate 2, during the pressing process, the spacing adjustment component will control the two sets of horizontal plates 401 to move towards the hot press plate 2, and use the lifting component to move the trapezoidal block 403 upward a certain distance to ensure that the trapezoidal block 403 is higher than the plane of the hot press plate 2. Then, the side of the trapezoidal block 403 and the elastic pressing component are attached to the side of the sheet material. After the two sets of hot press plates 2 are completely attached, the sheet material is completely pressed between the hot press plates 2.

[0048] In this embodiment, the elastic compression assembly includes a first spring 406, a push plate 407, and a slide rod 408. The push plate 407 is arranged parallel to the side of the trapezoidal stop 403 near the hot press plate 2. The first spring 406 is provided between the push plate 407 and the trapezoidal stop 403. The slide rod 408 is fixed on the push plate 407. The slide rod 408 passes through the inside of the first spring 406 and is slidably connected to the trapezoidal stop 403.

[0049] Local working principle: Initially, the top of the push plate 407 and the trapezoidal stop 403 are at the same horizontal plane. When the trapezoidal stop 403 moves upward, the push plate 407 also rises. When the horizontal plate 401 moves the trapezoidal stop 403, the push plate 407 will first stick to the side of the plate until the push plate 407 sticks to the end of the hot press plate 2. The position of the push plate 407 is fixed. If the horizontal plate 401 continues to move the trapezoidal stop 403, the first spring 406 will be squeezed.

[0050] In this embodiment, the lifting assembly includes a through groove 404 and a trapezoidal insert 405. The through groove 404 is opened at the bottom of the vertical groove 402 and passes through the horizontal plate 401. The side of the hot press plate 2 is fixed with trapezoidal inserts 405 at the positions corresponding to the through groove 404. The inclined surface at the end of the trapezoidal insert 405 fits with the inclined surface at the bottom of the trapezoidal stop 403. The inclined surface angle of the trapezoidal insert 405 is 45° and the inclined surface at the bottom of the trapezoidal stop 403 matches.

[0051] Local working principle: When the horizontal plate 401 moves the trapezoidal stop 403, the trapezoidal insert 405 will press the trapezoidal stop 403 upward, thus controlling the upward sliding of the trapezoidal stop 403.

[0052] In this embodiment, the ends of the trapezoidal blocks 403 are vertically provided with strip grooves 409, and the top of the inner side of each strip groove 409 is slidably provided with a second slider 410. A second spring 411 is provided between the bottom of the second slider 410 and the bottom of the strip groove 409. The end of the second slider 410 is fixedly connected to the side of the vertical groove 402.

[0053] Local working principle: During the upward movement of the trapezoidal stop 403, the second slider 410 will compress the second spring 411. After the horizontal plate 401 drives the trapezoidal stop 403 to reset, the second spring 411 will quickly push the trapezoidal stop 403 downward to reset.

[0054] In this embodiment, the spacing adjustment assembly includes a connecting rod 412 and a rectangular sliding hole 413. The connecting rod 412 is fixed on the opposite side of the first slider 302. The end of the connecting rod 412 passes through the other first slider 302 and is slidably connected to the other first slider 302. The first slider 302 is provided with a rectangular sliding hole 413 for the connecting rod 412 to pass through. The end of the connecting rod 412 is fixedly connected to the end of the horizontal plate 401.

[0055] Local working principle: During the process of controlling the lifting and lowering of the hot press plate 2, the sliding of the first slider 302 will drive the movement of the horizontal plate 401. The linkage control method is adopted, which makes it more convenient to use.

[0056] In this embodiment, a ball bearing is rotatably mounted on the inclined surface at the bottom of the trapezoidal stop 403, and the ball bearing is located at both ends of the inclined surface.

[0057] Local working principle: The ball bearings at the bottom of the trapezoidal stop 403 can reduce the frictional resistance between it and the trapezoidal insert 405, thereby reducing wear.

[0058] like Figures 1-8 As shown in the figure, the temperature control method of the hot press device with temperature control structure provided in this embodiment is as follows:

[0059] Step 1: When the hot press plate 2 is preheated, steam enters from the inside of the steam inlet pipe 503, passes through one end of the first hollow pipe 501 and enters the inside of the diversion pipe 505, and then is evenly distributed into the inside of multiple sets of hot press plates 2 for heating, and then is discharged from the inside of the hot press plate 2, and then passes through the manifold 504, the second hollow pipe 507 and the other end of the first hollow pipe 501 and finally is discharged from the inside of the steam outlet pipe 502.

[0060] Step 2: After the steam enters the interior of the first hollow tube 501 through the steam inlet pipe 503, due to the temperature difference between the two ends of the first hollow tube 501, the pressure at the end near the steam inlet pipe 503 is greater, and there will be some expansion. Control the piston 506 to slide towards the end of the steam inlet pipe 503, increase the area of ​​the opening at the top of the diversion pipe 505, and thus accelerate the preheating of the hot platen 2.

[0061] Step 3: After the hot press plate 2 finishes heating up, the temperature difference between the two ends of the first hollow tube 501 decreases and the pressure difference decreases. The tension spring 510 pulls the piston 506 to reset, and the steam enters the interior of the diversion tube 505 stably.

[0062] Step 4: When the temperature discharged from the manifold 504 is high and about to reach the set threshold, the bimetallic strip 509 bends and deforms, controlling the baffle 508 to move towards the inside of the split pipe 505, reducing the air intake of the split pipe 505, thereby regulating the temperature and preventing the hot press plate 2 from overheating.

[0063] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A hot pressing device with a temperature control structure, comprising a frame (1), characterized in that: The frame (1) is evenly equipped with hot press plates (2). The bottom of the frame (1) is equipped with a hydraulic cylinder to control the lifting and lowering of the hot press plates (2). A connecting mechanism (3) is provided between the ends of adjacent hot press plates (2). A pushing mechanism (4) is symmetrically provided on the side of the hot press plates (2). A temperature control mechanism (5) is provided at the end of the frame (1) and communicates with the air inlet and outlet holes at the end of the hot press plates (2). The temperature control mechanism (5) includes a first hollow tube (501), a steam exhaust pipe (502), a steam inlet pipe (503), a manifold (504), a branch pipe (505), a piston (506), a second hollow tube (507), a partition plate (508), and a bimetallic strip (509). The first hollow tube (501) is fixed to the end of the frame (1). A steam exhaust pipe (502) is installed at one end of the top of the first hollow tube (501), and a steam inlet pipe (503) is installed at the other end of the top of the first hollow tube (501). A manifold (504) is provided at the bottom of the first hollow tube (501) near the steam exhaust pipe (502). The manifold (504) is connected to the exhaust port of the hot press plate (2) through a pipe. A branch pipe (505) is provided at the bottom of the first hollow tube (501) near the steam inlet pipe (503), and the branch pipe (505) is connected to the exhaust port of the hot press plate (2) through a pipe. The pipe is connected to the air inlet of the hot press plate (2). A piston (506) is slidably installed inside the first hollow pipe (501). The piston (506) is located in the middle of the first hollow pipe (501) and blocks the top of the diverter pipe (505). A tension spring (510) is provided between the end of the piston (506) near the steam inlet pipe (503) and the end of the first hollow pipe (501). A second spring (510) is provided at the bottom of the first hollow pipe (501). The second hollow tube (507) is connected to the manifold (504). A baffle (508) is slidably provided at one end of the second hollow tube (507) near the branch tube (505). The baffle (508) extends slidably into the interior of the branch tube (505). A bimetallic strip (509) is vertically provided at the top of the inside of the second hollow tube (507). The bimetallic strip (509) slides through the baffle (508). The connecting mechanism (3) includes a linear slide (301), a first slider (302), a crossbar (303), a shaft (304), and a center limiting component. The linear slide (301) is symmetrically opened at the ends of the hot press plate (2). The first slider (302) is slidably arranged inside the linear slide (301). The crossbar (303) is hinged between the first sliders (302) at the ends of adjacent hot press plates (2). The shaft (304) is provided at the center of the crossbar (303). The end of the frame (1) is provided with a center limiting component that limits the crossbar (303). The center limiting assembly includes a limiting block (305) and a vertical rod (306). The limiting block (305) is rotatably mounted on the end of the shaft (304), and the vertical rod (306) is vertically set at both ends of the frame (1). The limiting block (305) and the vertical rod (306) are slidably connected. The pushing mechanism (4) includes a horizontal plate (401), a vertical groove (402), a trapezoidal block (403), a lifting component, a spacing adjustment component, and an elastic extrusion component. The horizontal plate (401) is horizontally arranged on both sides of the hot press plate (2), and the height of the horizontal plate (401) is the same as the thickness of the hot press plate (2). The inner side of the horizontal plate (401) is vertically provided with a vertical groove (402), and the interior of the vertical groove (402) is vertically slidably provided with a trapezoidal block (403). The side of the hot press plate (2) is provided with a lifting component to control the sliding of the trapezoidal block (403). The two sets of horizontal plates (401) on the side of the hot press plate (2) are provided with a spacing adjustment component. The side of the trapezoidal block (403) close to the hot press plate (2) is provided with an elastic extrusion component. The lifting assembly includes a through slot (404) and a trapezoidal insert (405). The through slot (404) is opened at the bottom of the vertical slot (402) and the through slot (404) passes through the horizontal plate (401). The side of the hot press plate (2) is fixed with a trapezoidal insert (405) at the position corresponding to the through slot (404). The inclined surface at the end of the trapezoidal insert (405) is in contact with the inclined surface at the bottom of the trapezoidal stop (403). The spacing adjustment assembly includes a connecting rod (412) and a rectangular sliding hole (413). The connecting rod (412) is fixed on the opposite side of the first slider (302). The end of the connecting rod (412) passes through another first slider (302) and is slidably connected to the other first slider (302). The first slider (302) is provided with a rectangular sliding hole (413) for the connecting rod (412) to pass through. The end of the connecting rod (412) is fixedly connected to the end of the horizontal plate (401).

2. The hot pressing device with a temperature control structure according to claim 1, characterized in that: The elastic compression assembly includes a first spring (406), a push plate (407), and a slide rod (408). The push plate (407) is arranged parallel to the side of the trapezoidal block (403) near the hot press plate (2). The first spring (406) is provided between the push plate (407) and the trapezoidal block (403). The slide rod (408) is fixed on the push plate (407). The slide rod (408) passes through the inside of the first spring (406) and is slidably connected to the trapezoidal block (403).

3. The hot pressing device with a temperature control structure according to claim 1, characterized in that: The ends of the trapezoidal blocks (403) are vertically provided with strip grooves (409), and the top of the inner side of each strip groove (409) is slidably provided with a second slider (410). The bottom of the second slider (410) and the bottom of the strip groove (409) are provided with a second spring (411). The end of the second slider (410) is fixedly connected to the side of the vertical groove (402).

4. The hot pressing device with a temperature control structure according to claim 1, characterized in that: A ball bearing is rotatably mounted on the inclined surface at the bottom of the trapezoidal stop (403), and the ball bearing is located at both ends of the inclined surface.

5. A temperature control method for a hot pressing device with a temperature control structure, based on the hot pressing device with a temperature control structure according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: When the hot press plate (2) is preheated, steam enters from the inside of the steam inlet pipe (503), passes through one end of the first hollow pipe (501) and enters the inside of the distribution pipe (505), and then flows evenly into the inside of multiple sets of hot press plates (2) for heating, and then exits from the inside of the hot press plate (2), and then passes through the manifold (504), the second hollow pipe (507) and the other end of the first hollow pipe (501) and finally exits from the inside of the steam outlet pipe (502); Step 2: After the steam enters the interior of the first hollow tube (501) through the steam inlet pipe (503), due to the temperature difference between the two ends of the first hollow tube (501), the pressure at the end near the steam inlet pipe (503) is greater, and there will be a certain expansion. Control the piston (506) to slide towards the end of the steam inlet pipe (503), increase the area of ​​the opening at the top of the diversion pipe (505), and thus accelerate the preheating of the hot platen (2). Step 3: After the hot press plate (2) finishes heating, the temperature difference between the two ends of the first hollow tube (501) decreases and the pressure difference decreases. The tension spring (510) pulls the piston (506) to reset, and the steam enters the interior of the diversion tube (505) stably. Step 4: When the temperature discharged from the manifold (504) is high and about to reach the set threshold, the bimetallic strip (509) bends and deforms, controlling the baffle (508) to move toward the inside of the split pipe (505), reducing the air intake of the split pipe (505), thereby regulating the temperature and preventing the temperature of the hot plate (2) from overheating.

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