Hot pressing device with temperature control structure and temperature control method

Abstract

The invention 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 machine frame, in the temperature rising process, according to the temperature difference and air pressure changes of the two ends of the interior of the first hollow pipe, movement of the piston can be controlled, the opening size of the flow dividing pipe is increased, the steam inlet amount is increased, and the hot pressing plate is rapidly heated; the temperature difference between the two ends of the first hollow pipe is reduced, the air pressure area is stable, a tension spring controls a piston to reset, stable air inflow is conducted on the flow dividing pipe, in addition, when steam exhausted by the flow collecting pipe is too high, due to deformation of a bimetallic strip, a partition plate can be controlled to move towards the interior of the flow dividing pipe, the air inflow amount is reduced, and therefore the temperature is prevented from being too high; and temperature control adjustment can be automatically carried out, the functionality of the device is improved, and the quality and speed of hot pressing are guaranteed.

Description

Technical Field

[0001] The present invention relates to a hot pressing device, particularly to a hot pressing device with a temperature control structure. The present invention also relates to a temperature control method, particularly to a temperature control method for a hot pressing device with a temperature control structure, and belongs to the technical field of plywood processing. Background Art

[0002] The plywood hot pressing device is a key equipment in the plywood production process. It is mainly used to hot press and glue the assembled board blanks under certain temperature and pressure to form plywood with certain strength and dimensional stability. This device usually consists of a frame, a heating system, a pressurizing system, a control system, etc. The heating system can use steam, electricity or heat-conducting oil, etc. to provide heat sources to ensure that the hot pressing plate reaches an appropriate temperature, so that the adhesive in the board blank melts and penetrates between the wood fibers. The pressurizing system applies pressure to the board blank by hydraulic or mechanical means to make each layer of veneer fit tightly. The control system precisely controls parameters such as temperature, pressure, and time to ensure the stability of the hot pressing process and the quality of the plywood. Its efficient hot pressing process can effectively improve production efficiency, enhance the bonding strength and surface quality of the plywood, and is an important and indispensable equipment in the industrial production of plywood.

[0003] Currently, in the hot pressing process, when using steam as the heat source, the device cannot achieve automatic temperature control. When the highest temperature warning is reached, it is necessary to manually stop the gas supply and pressure, and then increase the pressure and gas supply after the temperature drops, which is a semi-automatic operation, affecting the temperature control effect during use. Moreover, during the process of the hot pressing plate being squeezed and separated, the hot pressing plate needs to be sequentially fitted and separated, which prolongs the time for loading, squeezing, and unloading. In addition, during the process of hot pressing the loaded materials, the sheet materials cannot be self-adjusted, which may cause some sheet materials to be located outside the hot pressing plate, affecting the overall forming effect.

[0004] Therefore, a hot pressing device with a temperature control structure and a temperature control method are designed to optimize the above problems. Summary of the Invention

[0005] The main object of the present invention is to provide a hot pressing device with a temperature control structure and a temperature control method. By providing a temperature control mechanism composed of a first hollow tube, a steam discharge tube, a steam inlet tube, a manifold tube, a shunt tube, a piston, a second hollow tube, a bimetallic strip, a partition plate, and a tension spring at the end of the frame, during the heating process, according to the temperature difference between the two ends inside the first hollow tube and the change in air pressure, the movement of the piston can be controlled, the opening size of the shunt tube can be increased, the steam intake can be increased, and the hot pressing plate can be quickly heated. After the heating is completed, the temperature difference between the two ends of the first hollow tube decreases, the air pressure becomes stable, and the tension spring controls the piston to reset, and a stable intake of steam is carried out for the shunt tube. In addition, when the steam discharged from the manifold tube is too high, due to the deformation of the bimetallic strip, the partition plate can be controlled to move towards the inside of the shunt tube, reducing the intake amount, thereby avoiding excessive temperature. During the use of the device, the temperature can be automatically controlled and adjusted, improving the functionality of the device, ensuring the quality and rate of hot pressing. By providing a connection mechanism composed of a linear chute, a first slider, a cross bar, a shaft rod, a limit block, and a vertical rod between the hot pressing plates, during the use of the device, all hot pressing plates can be simultaneously actuated by using a pressurization system, eliminating the time of "waiting layer by layer" in the sequential action, improving the processing rate, and the synchronous control can make all the pressing plates enter the working state simultaneously, making the load of the motor / hydraulic system more balanced and the energy consumption efficiency higher. Through a pushing mechanism composed of a cross plate, a vertical groove, a trapezoidal stop block, a through groove, a trapezoidal insert block, a first spring, a push plate, a slide rod, a strip groove, a second slider, a second spring, a connecting rod, and a rectangular slide hole, during the loading process of the sheet material, the cross plate is separated from the hot pressing plate, and during the extrusion process, since the connecting rod is connected to the first slider, during the extrusion process, two groups of cross plates can be simultaneously controlled to move towards each other, and the push plate can be controlled to move upward, and the sheet material protruding outside the hot pressing plate is pushed towards the inside of the hot pressing plate by using the push plate, ensuring that the sheet material is completely extruded and ensuring the forming effect of the sheet material.

[0006] The object of the present invention can be achieved by adopting the following technical solutions:

[0007] A hot pressing device with a temperature control structure, including a frame, hot pressing plates are evenly arranged inside the frame, a hydraulic cylinder for controlling the lifting of the hot pressing plates is provided at the inner bottom of the frame, a connection 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, and a temperature control mechanism communicated 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 discharge pipe, a steam inlet pipe, a confluence pipe, a shunt pipe, a piston, a second hollow tube, a partition plate and a bimetallic strip. The first hollow tube is fixed at the end of the frame. One end at the top of the first hollow tube is provided with a steam discharge pipe, and the other end at the top of the first hollow tube is provided with a steam inlet pipe. A confluence pipe is provided at one end of the bottom of the first hollow tube near the steam discharge pipe. The confluence pipe is communicated with the exhaust port of the hot pressing plate through a pipeline. A shunt pipe is provided at one end of the bottom of the first hollow tube near the steam inlet pipe, and the shunt pipe is communicated with the air inlet of the hot pressing plate through a conduit. A piston is slidably arranged inside the first hollow tube. The piston is located at the middle position of the first hollow tube and blocks the top end of the shunt pipe. A tension spring is arranged between one end of the piston close to 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 inside of the second hollow tube is communicated with the confluence pipe. A partition plate is slidably arranged at one end of the second hollow tube close to the shunt pipe. The partition plate slidably extends into the shunt pipe. A bimetallic strip is vertically arranged at the top inside the second hollow tube. The bimetallic strip slides through the partition plate.

[0009] Preferably, the connection mechanism includes a linear chute, a first slider, a cross bar, a shaft rod and a central limit component. The linear chutes are symmetrically arranged at the ends of the hot pressing plate. First sliders are slidably arranged inside the linear chutes. A cross bar is hingedly installed between the first sliders at the ends of adjacent hot pressing plates. A shaft rod is arranged at the center of the cross bar. A central limit component for limiting the cross bar is arranged at the end of the frame.

[0010] Preferably, the central limit component includes a limit block and a vertical rod. The limit block is rotatably installed at the end of the shaft rod. The vertical rods are vertically arranged at both ends of the frame, and the limit block is slidably connected with the vertical rod.

[0011] Preferably, the pushing mechanism includes a horizontal plate, a vertical groove, a trapezoidal stop block, a lifting component, a spacing adjusting component and an elastic extrusion component. The horizontal plates are horizontally arranged on both sides of the hot pressing plate, and the height of the horizontal plates is the same as the thickness of the hot pressing plate. Vertical grooves are vertically opened on the inner sides of the horizontal plates. Trapezoidal stop blocks are vertically slidably arranged inside the vertical grooves. A lifting component for controlling the sliding of the trapezoidal stop blocks is arranged on the side of the hot pressing plate. A spacing adjusting component is arranged between the two groups of horizontal plates on the side of the hot pressing plate. Elastic extrusion components are arranged on the sides of the trapezoidal stop blocks close to the hot pressing plate.

[0012] Preferably, the elastic extrusion component includes a first spring, a push plate and a slide rod. A push plate is arranged in parallel on the side of the trapezoidal stop block close to the hot pressing plate. A first spring is arranged between the push plate and the trapezoidal stop block. A slide rod is fixed on the push plate. The slide rod passes through the inside of the first spring and is slidably connected with the trapezoidal stop block.

[0013] Preferably, the lifting assembly includes a through groove and trapezoidal inserts. The through groove is formed at the bottom of the vertical groove and penetrates the horizontal plate. Trapezoidal inserts are fixed to the sides of the hot pressing plate corresponding to the positions of the through grooves, and the inclined surfaces at the ends of the trapezoidal inserts are in contact with the inclined surfaces at the bottom of the trapezoidal stoppers.

[0014] Preferably, strip-shaped grooves are vertically formed at the ends of the trapezoidal stoppers. Second sliders are slidably arranged at the inner tops of the strip-shaped grooves. Second springs are provided between the bottoms of the second sliders and the bottom ends of the strip-shaped grooves. The ends of the second sliders are fixedly connected to the sides of the vertical grooves.

[0015] Preferably, the spacing adjustment assembly includes connecting rods and rectangular sliding holes. Connecting rods are fixed to the opposite sides of the first sliders. The ends of the connecting rods penetrate through the other first slider and are slidably connected to the other first slider. Rectangular sliding holes for the connecting rods to pass through are formed in the first sliders. The ends of the connecting rods are fixedly connected to the ends of the horizontal plate.

[0016] Preferably, balls are rotatably mounted on the inclined surfaces at the bottoms of the trapezoidal stoppers, and the balls are respectively located at both ends of the inclined surfaces.

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

[0018] Step 1: When the hot pressing plate is preheated and heated up, steam enters from the inside of the steam inlet pipe, enters the inside of the first hollow pipe through one end, then enters the inside of the flow dividing pipe evenly after being divided, and then enters the inside of multiple groups of hot pressing plates for heating up, and then is discharged from the inside of the hot pressing plate, and then passes through the confluence pipe, the second hollow pipe, and the other end of the first hollow pipe, and finally is discharged from the inside of the steam discharge pipe;

[0019] Step 2: After the steam enters the inside of the first hollow pipe from the steam inlet pipe, due to a certain temperature difference between the two ends of the first hollow pipe, the pressure at the end close to the steam inlet pipe is relatively large and there will be a certain expansion, controlling the piston to slide towards the end of the steam inlet pipe, increasing the area of the open end at the top of the flow dividing pipe, and thus accelerating the preheating of the hot pressing plate;

[0020] Step 3: After the heating of the hot pressing plate is completed, the temperature difference between the two ends of the first hollow pipe decreases, and the pressure difference decreases. The tension spring pulls the piston back to its original position, and the steam stably enters the inside of the flow dividing pipe;

[0021] Step 4: When the temperature discharged from the confluence pipe is relatively high and is about to reach the set threshold value, the bimetallic strip bends and deforms, controlling the partition plate to move towards the inside of the flow dividing pipe, reducing the intake air volume of the flow dividing pipe, and thus regulating the temperature to prevent the temperature of the hot pressing plate from being overheated.

[0022] The beneficial effects of the present invention are:

[0023] The hot pressing device with a temperature control structure and the temperature control method provided by the present invention can, through the temperature control mechanism composed of a first hollow tube, a steam discharge tube, a steam inlet tube, a confluence tube, a shunt tube, a piston, a second hollow tube, a bimetallic strip, a partition plate, and a tension spring provided at the end of the frame, control the movement of the piston according to the temperature difference between the two ends inside the first hollow tube and the change in air pressure during the heating process, increase the opening size of the shunt tube, improve the steam inlet volume, and quickly heat the hot pressing plate. After the heating is completed, the temperature difference between the two ends of the first hollow tube decreases, the air pressure becomes stable, and the tension spring controls the piston to reset, stably admitting air into the shunt tube. Additionally, when the steam discharged from the confluence tube is too high, due to the deformation of the bimetallic strip, the partition plate can be controlled to move towards the inside of the shunt tube, reducing the air intake volume, thereby avoiding excessive temperature. This enables the device to automatically adjust the temperature control during use, improves the functionality of the device, and ensures the quality and rate of hot pressing;

[0024] By providing a connection mechanism composed of a linear chute, a first slider, a cross bar, a shaft rod, a limit block, and a vertical rod between the hot pressing plates, during the use of the device, the pressurization system can be used to synchronously control all the hot pressing plates to act simultaneously, eliminating the time of "waiting layer by layer" in the sequential action, improving the processing rate, and the synchronous control can make all the pressing plates enter the working state simultaneously, making the load of the motor / hydraulic system more balanced and the energy consumption efficiency higher;

[0025] Through a pushing mechanism composed of a cross plate, a vertical groove, a trapezoidal stop block, a through groove, a trapezoidal insert block, a first spring, a push plate, a sliding rod, a strip groove, a second slider, a second spring, a connecting rod, and a rectangular sliding hole, during the loading process of the plate, the cross plate is separated from the hot pressing plate. During the extrusion process, since the connecting rod is connected to the first slider, it can control the two cross plates to move towards each other simultaneously during the extrusion process and control the push plate to move upward, using the push plate to push the plate protruding outside the hot pressing plate into the hot pressing plate, ensuring that the plate is completely extruded and ensuring the forming effect of the plate. Description of the Drawings

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

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

[0028] Figure 3 It is the outer structure diagram of the hot pressing plate of a preferred embodiment of the hot pressing device with a temperature control structure and the temperature control method of the present invention;

[0029] Figure 4 It is a preferred embodiment of the hot pressing device with a temperature control structure and the temperature control method of the present inventionFigure 1 Enlarged view of part A

[0030] Figure 5 Structural diagram of the hot pressing plate of a preferred embodiment of the hot pressing device with a temperature control structure and the temperature control method of the present invention

[0031] Figure 6 Of a preferred embodiment of the hot pressing device with a temperature control structure and the temperature control method of the present invention Figure 1 Enlarged view of part B

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

[0033] Figure 8 Trapezoidal stop block diagram of a preferred embodiment of the hot pressing device with a temperature control structure and the temperature control method of the present invention

[0034] In the figure: 1. Frame; 2. Hot pressing plate

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

[0036] 4. Pushing mechanism; 401. Horizontal plate; 402. Vertical groove; 403. Trapezoidal stop block; 404. Through groove; 405. Trapezoidal insert block; 406. First spring; 407. Push plate; 408. Slide 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 discharge pipe; 503. Steam inlet pipe; 504. Confluence pipe; 505. Shunt pipe; 506. Piston; 507. Second hollow tube; 508. Partition board; 509. Bimetallic strip; 510. Tension spring Detailed implementation mode

[0038] To make the technical solutions of the present invention clearer and more definite for those skilled in the art, the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the implementation manners of the present invention are not limited thereto.

[0039] As Figures 1 - 8 shown, this embodiment provides a hot pressing device with a temperature control structure, including a frame 1. Inside the frame 1, hot pressing plates 2 are evenly arranged. A hydraulic cylinder for controlling the lifting of the hot pressing plates 2 is provided at the inner bottom of the frame 1. A connecting mechanism 3 is provided between the ends of adjacent hot pressing plates 2. Pushing mechanisms 4 are symmetrically arranged on the sides of the hot pressing plates 2. A temperature control mechanism 5 communicating with the intake and exhaust holes at the ends of the hot pressing plates 2 is provided at the end of the frame 1;

[0040] The temperature control mechanism 5 includes a first hollow tube 501, a steam discharge pipe 502, a steam inlet pipe 503, a manifold pipe 504, a shunt 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. One end at the top of the first hollow tube 501 is provided with the steam discharge pipe 502, and the other end at the top of the first hollow tube 501 is provided with the steam inlet pipe 503. A manifold pipe 504 is provided at one end of the bottom of the first hollow tube 501 close to the steam discharge pipe 502. The manifold pipe 504 is communicated with the exhaust port of the hot pressing plate 2 through a pipeline. A shunt pipe 505 is provided at one end of the bottom of the first hollow tube 501 close to the steam inlet pipe 503, and the shunt pipe 505 is communicated with the air inlet of the hot pressing plate 2 through a conduit. The inside of the shunt pipe 505 is provided with equally spaced diversion holes (aperture 8 mm, quantity = the quantity of hot pressing plates). Each diversion hole corresponds to the air inlet of the hot pressing plate 2. The distance between the diversion holes is evenly divided according to the layout of the hot pressing plate 2 to ensure that the flow deviation ≤ 5%. A piston 506 is slidably arranged inside the first hollow tube 501. An annular groove is provided on the outer periphery of the piston 506, and a high-temperature resistant silica gel sealing ring is embedded, with a hardness of 60 ± 5 Shore A. The sealing ring is in interference fit with the inner wall of the first hollow tube 501, and the interference amount is 0.2 mm to ensure steam sealing. The piston 506 is located at the middle position of the first hollow tube 501 and blocks the top end of the shunt pipe 505. A tension spring 510 is provided between one end of the piston 506 close to the steam inlet pipe 503 and the end of the first hollow tube 501. The temperature of the area of the first hollow tube 501 on the side of the steam inlet pipe 503 is T1, and the temperature on the side of the steam discharge pipe 502 is T2. When the initial temperature difference ΔT = T1 - T2 ≥ 50 °C, the gas expands to push the piston 506 to move and stretch the tension spring 510. The stroke L of the piston 506 = 0.1×ΔT (mm) until the open area of the shunt pipe 505 increases to 1.5 times the initial value. When ΔT ≤ 10 °C, the elastic coefficient k of the tension spring 510 = 5 N / mm, and the piston 506 is pulled back to its original position. A second hollow tube 507 is provided at the bottom of the first hollow tube 501. The inside of the second hollow tube 507 is communicated with the manifold pipe 504. A partition plate 508 is slidably arranged at one end of the second hollow tube 507 close to the shunt pipe 505. The partition plate 508 slidably extends into the inside of the shunt pipe 505. A bimetallic strip 509 is vertically arranged at the top inside the second hollow tube 507. The bimetallic strip 509 slides through the partition plate 508. The aperture on the partition plate 508 is 0.5 mm larger than the thickness of the bimetallic strip 509 to allow it to bend freely. A copper-steel composite bimetallic strip is adopted. The steel layer faces the side of the shunt pipe 505, and the copper layer faces the inside of the second hollow tube 507. Utilizing the characteristic that the expansion coefficient of copper (17×10 -6 / °C) is greater than that of steel (12×10 -6 / °C), when the temperature exceeds the set threshold, the bimetallic strip 509 bends towards the side of the steel layer.

[0041] Overall working principle: During use, first place the sheet between the hot pressing plates 2, and then use the hydraulic cylinder to control the bottom hot pressing plate 2 to move upward. Due to the use of the connecting mechanism 3, multiple groups of hot pressing plates 2 can act simultaneously, move upward and quickly fit. During the fitting process, use the pushing mechanism to push the sheet protruding from the side towards the space between the hot pressing plates 2 to ensure that the sheet can be completely extruded. During the process of extruding and fitting the sheet, steam enters from the inside of the steam inlet pipe 503, enters the inside of the shunt pipe 505 through one end of the first hollow pipe 501, and then is evenly shunted into multiple groups of hot pressing plates 2 for heating up, and then discharged from the inside of the hot pressing plates 2, and then passes through the confluence pipe 504, the second hollow pipe 507 and the other end of the first hollow pipe 501 and is finally discharged from the inside of the steam discharge pipe 502. After the steam enters the inside of the first hollow pipe 501 from the steam inlet pipe 503, due to a certain temperature difference at both ends of the first hollow pipe 501, the pressure at the end close to the steam inlet pipe 503 is relatively large and there will be a certain expansion, controlling the piston 506 to slide towards the end of the steam inlet pipe 503, increasing the open area at the top of the shunt pipe 505, thereby accelerating the preheating of the hot pressing plates 2. When the temperature rise of the hot pressing plates 2 ends, the temperature difference at both ends of the first hollow pipe 501 decreases and the pressure difference also decreases, and the tension spring 510 pulls the piston 506 back to its original position, and the steam stably enters the inside of the shunt pipe 505. When the temperature discharged from the confluence pipe 504 is relatively high and is about to reach the set threshold, the bimetallic strip 509 bends and deforms, controlling the partition plate 508 to move towards the inside of the shunt pipe 505, reducing the air intake of the shunt pipe 505, thereby regulating the temperature and preventing the temperature of the hot pressing plates 2 from overheating. After the hot pressing is completed, control the separation of the hot pressing plates 2 and push out the sheet.

[0042] In this embodiment, the connecting mechanism 3 includes a linear chute 301, a first slider 302, a cross bar 303, a shaft rod 304 and a central limiting component. The linear chutes 301 are symmetrically opened at the ends of the hot pressing plates 2, and the first sliders 302 are slidably arranged inside the linear chutes 301. The first sliders 302 at the ends of adjacent hot pressing plates 2 are hinged with a cross bar 303. Both ends of the cross bar 303 are hinged with the first slider 302 through a pin shaft (diameter 10 mm), and an elastic retaining ring is provided on the pin shaft to prevent it from falling off. The initial angle between the cross bars 303 of adjacent hot pressing plates 2 is 90°, and the angle changes within the range of 60° - 120° during lifting. A shaft rod 304 is provided at the center of the cross bar 303, and a central limiting component for limiting the cross bar 303 is provided at the end of the frame 1.

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

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

[0045] Local working principle: During the process of controlling the lifting of the hot pressing plate 2, the presence of the vertical rod 306 can limit the cross rod 303 to prevent the horizontal sliding of the cross rod 303.

[0046] In this embodiment, the pushing mechanism 4 includes a horizontal plate 401, a vertical groove 402, a trapezoidal stop 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 pressing plate 2, and the height of the horizontal plate 401 is the same as the thickness of the hot pressing plate 2. Vertical grooves 402 are vertically formed on the inner sides of the horizontal plates 401, and trapezoidal stop blocks 403 are vertically slidably arranged inside the vertical grooves 402. A lifting component for controlling the sliding of the trapezoidal stop block 403 is provided on the side of the hot pressing plate 2, a spacing adjustment component is provided between the two groups of horizontal plates 401 on the side of the hot pressing plate 2, and elastic extrusion components are provided on the sides of the trapezoidal stop blocks 403 close to the hot pressing plate 2.

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

[0048] In this embodiment, the elastic extrusion component includes a first spring 406, a push plate 407, and a slide rod 408. A push plate 407 is arranged in parallel on the side of the trapezoidal stop block 403 close to the hot pressing plate 2. A first spring 406 is provided between the push plate 407 and the trapezoidal stop block 403. A slide rod 408 is fixed on the push plate 407, and the slide rod 408 passes through the inside of the first spring 406 and is slidably connected to the trapezoidal stop block 403.

[0049] Local working principle: Initially, the top of the push plate 407 and the trapezoidal stop block 403 are at the same horizontal plane. When the trapezoidal stop block 403 moves upward, the push plate 407 also rises. When the horizontal plate 401 drives the trapezoidal stop block 403 to move, the push plate 407 will first be attached to the side of the plate until the push plate 407 is attached to the end of the hot pressing plate 2, and the position of the push plate 407 is fixed. If the horizontal plate 401 drives the trapezoidal stop block 403 to continue moving, at this time, the first spring 406 will be squeezed.

[0050] In this embodiment, the lifting component includes a through groove 404 and a trapezoidal insertion block 405. The through groove 404 is opened at the bottom of the vertical groove 402 and penetrates through the transverse plate 401. Trapezoidal insertion blocks 405 are fixed at the corresponding positions of the side edges of the hot pressing plate 2. The inclined surface at the end of the trapezoidal insertion block 405 fits with the inclined surface at the bottom of the trapezoidal stop block 403. The inclined surface angle of the trapezoidal insertion block 405 is 45°, which matches the inclined surface at the bottom of the trapezoidal stop block 403.

[0051] Local working principle: When the transverse plate 401 drives the trapezoidal stop block 403 to move, the trapezoidal insertion block 405 will squeeze the trapezoidal stop block 403 upward, thus controlling the upward sliding of the trapezoidal stop block 403.

[0052] In this embodiment, strip-shaped grooves 409 are vertically opened at the ends of the trapezoidal stop blocks 403. Second sliders 410 are slidably arranged at the inner tops of the strip-shaped grooves 409. Second springs 411 are arranged between the bottoms of the second sliders 410 and the bottom ends of the strip-shaped grooves 409. The ends of the second sliders 410 are fixedly connected to the side edges of the vertical grooves 402.

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

[0054] In this embodiment, the spacing adjustment component includes connecting rods 412 and rectangular sliding holes 413. Connecting rods 412 are fixed on the opposite sides of the first slider 302. The ends of the connecting rods 412 penetrate through the other first slider 302 and are slidably connected to the other first slider 302. Rectangular sliding holes 413 for the connecting rods 412 to pass through are opened on the first sliders 302. The ends of the connecting rods 412 are fixedly connected to the ends of the transverse plate 401.

[0055] Local working principle: During the process of controlling the lifting of the hot pressing plate 2, the sliding of the first slider 302 will drive the movement of the transverse plate 401. Adopting a linkage control method makes it more convenient to use.

[0056] In this embodiment, balls are rotatably installed on the inclined surface at the bottom of the trapezoidal stop block 403, and the balls are respectively located at both ends of the inclined surface.

[0057] Local working principle: The balls at the bottom end of the trapezoidal stop block 403 can reduce the frictional resistance between the trapezoidal stop block 403 and the trapezoidal insertion block 405 and reduce wear.

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

[0059] Step 1: When the hot pressing plate 2 is preheated and heated up, steam enters from the inside of the steam inlet pipe 503, enters the inside of the first hollow pipe 501 through one end of the first hollow pipe 501, then enters the inside of the flow dividing pipe 505 evenly through division, and then enters the inside of multiple groups of hot pressing plates 2 for heating up, and then is discharged from the inside of the hot pressing plate 2, and then passes through the confluence pipe 504, the second hollow pipe 507 and the other end of the first hollow pipe 501 and is finally discharged from the inside of the steam discharge pipe 502;

[0060] Step 2: After the steam enters the inside of the first hollow pipe 501 from the steam inlet pipe 503, due to a certain temperature difference at both ends of the first hollow pipe 501, the pressure at the end close to the steam inlet pipe 503 is relatively large and there will be a certain expansion, controlling the piston 506 to slide towards the end of the steam inlet pipe 503, increasing the area of the open top of the flow dividing pipe 505, and thus accelerating the preheating of the hot pressing plate 2;

[0061] Step 3: After the temperature rise of the hot pressing plate 2 ends, the temperature difference between both ends of the first hollow pipe 501 decreases, and the pressure difference also decreases. The tension spring 510 pulls the piston 506 to reset, and the steam stably enters the inside of the flow dividing pipe 505;

[0062] Step 4: When the temperature discharged from the confluence pipe 504 is relatively high and is about to reach the set threshold, the bimetallic sheet 509 bends and deforms, controlling the partition plate 508 to move towards the inside of the flow dividing pipe 505, reducing the air intake of the flow dividing pipe 505, and thus regulating the temperature to prevent the temperature of the hot pressing plate 2 from overheating.

[0063] As described above, it is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, all belong to the protection scope of the present invention.

Claims

1. A hot pressing device with a temperature control structure, comprising a frame (1), characterized in that: Inside the frame (1), hot pressing plates (2) are evenly arranged. At the inner bottom of the frame (1), a hydraulic cylinder for controlling the lifting of the hot pressing plates (2) is provided. Between the ends of adjacent hot pressing plates (2), a connecting mechanism (3) is provided. On the sides of the hot pressing plates (2), pushing mechanisms (4) are symmetrically arranged. At the end of the frame (1), a temperature control mechanism (5) is provided which is in communication with the air inlet and outlet holes at the ends of the hot pressing plates (2). The temperature control mechanism (5) includes a first hollow tube (501), a steam discharge pipe (502), a steam inlet pipe (503), a confluence pipe (504), a shunt 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 at the end of the frame (1). At one end of the top of the first hollow tube (501), a steam discharge pipe (502) is installed. At the other end of the top of the first hollow tube (501), a steam inlet pipe (503) is installed. At one end of the bottom of the first hollow tube (501) near the steam discharge pipe (502), a confluence pipe (504) is provided. The confluence pipe (504) is in communication with the exhaust port of the hot pressing plate (2) through a pipeline. At one end of the bottom of the first hollow tube (501) near the steam inlet pipe (503), a shunt pipe (505) is provided, and the shunt pipe (505) is in communication with the air inlet of the hot pressing plate (2) through a conduit. Inside the first hollow tube (501), a piston (506) is slidably arranged. The piston (506) is located at the middle position of the first hollow tube (501) and blocks the top end of the shunt pipe (505). Between one end of the piston (506) close to the steam inlet pipe (503) and the end of the first hollow tube (501), a tension spring (510) is provided. At the bottom of the first hollow tube (501), a second hollow tube (507) is provided. The inside of the second hollow tube (507) is in communication with the confluence pipe (504). Inside the second hollow tube (507) near the shunt pipe (505), a partition plate (508) is slidably arranged. The partition plate (508) slidably extends into the shunt pipe (505). Vertically arranged at the inner top of the second hollow tube (507) is a bimetallic strip (509), and the bimetallic strip (509) slides through the partition plate (508).

2. The hot pressing device with a temperature control structure according to claim 1, characterized in that: The connecting mechanism (3) includes linear chutes (301), first sliders (302), cross bars (303), shaft rods (304), and a central limiting component. The linear chutes (301) are symmetrically opened at the ends of the hot pressing plates (2). Inside the linear chutes (301), first sliders (302) are slidably arranged. Between the first sliders (302) at the ends of adjacent hot pressing plates (2), cross bars (303) are hingedly installed. At the center of the cross bar (303), a shaft rod (304) is provided. At the end of the frame (1), a central limiting component for limiting the cross bar (303) is provided.

3. The hot pressing device with a temperature control structure according to claim 2, characterized in that: The central limiting component includes a limiting block (305) and a vertical rod (306). The limiting block (305) is rotatably installed at the end of the shaft rod (304). The vertical rods (306) are vertically arranged at both ends of the frame (1), and the limiting block (305) is slidably connected with the vertical rod (306).

4. The hot pressing device with a temperature control structure according to claim 3, wherein: The pushing mechanism (4) includes a horizontal plate (401), vertical grooves (402), trapezoidal stoppers (403), a lifting assembly, a spacing adjustment assembly, and an elastic extrusion assembly. The horizontal plate (401) is horizontally arranged on both sides of the hot pressing plate (2), and the height of the horizontal plate (401) is the same as the thickness of the hot pressing plate (2). Vertical grooves (402) are vertically formed on the inner sides of the horizontal plates (401). Trapezoidal stoppers (403) are vertically and slidably arranged inside the vertical grooves (402). A lifting assembly for controlling the sliding of the trapezoidal stoppers (403) is provided on the side of the hot pressing plate (2). A spacing adjustment assembly is provided between two groups of horizontal plates (401) on the side of the hot pressing plate (2). Elastic extrusion assemblies are provided on the sides of the trapezoidal stoppers (403) close to the hot pressing plate (2).

5. The hot pressing device with a temperature control structure according to claim 4, wherein: The elastic extrusion assembly includes a first spring (406), a push plate (407), and a sliding rod (408). A push plate (407) is horizontally arranged on the side of the trapezoidal stopper (403) close to the hot pressing plate (2). A first spring (406) is provided between the push plate (407) and the trapezoidal stopper (403). A sliding rod (408) is fixed on the push plate (407). The sliding rod (408) passes through the inside of the first spring (406) and is slidably connected to the trapezoidal stopper (403).

6. The hot pressing device with a temperature control structure according to claim 5, characterized in that: The lifting assembly includes a through groove (404) and a trapezoidal insert block (405). The through groove (404) is formed at the bottom of the vertical groove (402) and penetrates the horizontal plate (401). Trapezoidal insert blocks (405) are fixed at the corresponding positions of the side of the hot pressing plate (2) with respect to the through grooves (404). The inclined surfaces at the ends of the trapezoidal insert blocks (405) are in contact with the inclined surfaces at the bottoms of the trapezoidal stoppers (403).

7. The hot pressing device with a temperature control structure according to claim 6, characterized in that: Strip-shaped grooves (409) are vertically formed at the ends of the trapezoidal stoppers (403). Second sliders (410) are slidably arranged at the inner tops of the strip-shaped grooves (409). Second springs (411) are provided between the bottoms of the second sliders (410) and the bottoms of the strip-shaped grooves (409). The ends of the second sliders (410) are fixedly connected to the sides of the vertical grooves (402).

8. The hot pressing device with a temperature control structure according to claim 4, characterized in that: The spacing adjustment assembly includes connecting rods (412) and rectangular sliding holes (413). Connecting rods (412) are fixed on the opposite sides of the first sliders (302). The ends of the connecting rods (412) penetrate through the other first sliders (302) and are slidably connected to the other first sliders (302). Rectangular sliding holes (413) for the connecting rods (412) to pass through are formed on the first sliders (302). The ends of the connecting rods (412) are fixedly connected to the ends of the horizontal plates (401).

9. The hot pressing device with a temperature control structure according to claim 4, characterized in that: Ball bearings are rotatably installed on the inclined surfaces at the bottoms of the trapezoidal stoppers (403), and the ball bearings are respectively located at both ends of the inclined surfaces.

10. 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 1-9, characterized in that, It includes the following steps: Step 1: When the hot press plate (2) is preheated and heated up, steam enters from the inside of the steam inlet pipe (503), enters the inside of the first hollow pipe (501) through one end, then enters the inside of the shunt pipe (505), and then is evenly shunted into the inside of multiple groups of hot press plates (2) for heating up, and then is discharged from the inside of the hot press plate (2), and then passes through the confluence pipe (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 discharge pipe (502); Step 2: After the steam enters the inside of the first hollow pipe (501) from the steam inlet pipe (503), due to a certain temperature difference at both ends of the first hollow pipe (501), the pressure at the end close to the steam inlet pipe (503) is relatively large and there will be a certain expansion, and the control piston (506) slides towards the end of the steam inlet pipe (503), increasing the area of the open top of the shunt pipe (505), thereby accelerating the preheating of the hot press plate (2); Step 3: After the hot press plate (2) finishes heating up, the temperature difference between both ends of the first hollow pipe (501) decreases and the pressure difference decreases, and the tension spring (510) pulls the piston (506) back to its original position, and the steam stably enters the inside of the shunt pipe (505); Step 4: When the temperature discharged from the confluence pipe (504) is relatively high and is about to reach the set threshold, the bimetallic strip (509) bends and deforms, controlling the partition plate (508) to move towards the inside of the shunt pipe (505), reducing the intake air volume of the shunt pipe (505), thereby regulating the temperature and preventing the temperature of the hot press plate (2) from overheating.

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