A bending device for plastic plate production and a bending method thereof

Abstract

The application relates to the technical field of plastic plate production, and discloses a bending device for plastic plate production and a bending method thereof, which comprises a top structure, a bending mechanism is arranged on the top structure, the bending mechanism comprises a bottom structure arranged below the top structure, a middle structure is rotatably arranged at the top end of the bottom structure, the top end of the middle structure is rotatably connected with the top structure, and the top structure further comprises a threaded rod rotatably arranged on the inner wall of the top of the top structure, a slotted circular block is fixedly arranged on the threaded rod, an extension spring is fixedly arranged on the bottom inner wall of the slotted circular block, and an annular block is fixedly arranged at the top end of the extension spring. After the plastic plate is cooled, the driving motor is reversed, the threaded rod drives the adaptive block to ascend, at the moment, all the mechanisms of the device can return to the positions before heating, the bent plastic plate can be taken out, and the bending efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of plastic sheet production equipment technology, specifically to a bending device and bending method for plastic sheet production. Background Technology

[0002] Plastic sheets are sheets made of plastic. Plastic is a synthetic polymer compound that can be freely shaped. Plastic is a material produced by polymerizing monomer raw materials through synthesis or condensation reactions. It consists of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. Its main component is synthetic resin.

[0003] Bending plastic sheets requires three steps: heating, bending, and cooling. Most bending processes need to be completed in steps, which wastes bending time. If the plastic sheet cannot be bent immediately after heating, it will cool down rapidly, which may cause the plastic to start to solidify, making bending difficult or causing cracks. Summary of the Invention

[0004] The purpose of this invention is to provide a bending device and a bending method for producing plastic sheets, in order to solve the problem that most bending processes need to be completed in steps, which wastes bending time. If the plastic sheet cannot be bent immediately after heating, the plastic sheet will cool down rapidly, which may cause the plastic to start to solidify, resulting in bending difficulties or cracks.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a bending device for producing plastic sheets, comprising a top structure, a bending mechanism mounted on the top structure, a bottom structure disposed below the top structure, a middle structure rotatably mounted on the top of the bottom structure, and a top of the middle structure rotatably connected to the top structure. The device also includes:

[0007] A threaded rod is rotatably mounted on the top inner wall of the top structure. A grooved circular block is fixedly sleeved on the threaded rod. A telescopic spring is fixedly mounted on the bottom inner wall of the grooved circular block. An annular block is fixedly mounted on the top of the telescopic spring. The annular block and the grooved circular block are slidably connected. Several connecting rods are hingedly mounted on the annular block. Several fixing plates are fixedly mounted on the bottom inner wall of the middle structure. Clamping springs are fixedly mounted on the opposite sides of the fixing plates. Clamping plates are fixedly mounted on the opposite ends of the clamping springs. Pushing blocks are hingedly mounted on the opposite ends of the connecting rods. The pushing blocks pass through the fixing plates and are slidably connected to them.

[0008] Furthermore, several clamping mechanisms are provided on the bottom inner wall of the central structure. A limiting template is fixedly installed on the top of the central structure. A U-shaped plate is fixedly installed on the back of the limiting template. A strip block is slidably installed on the U-shaped plate. The strip block passes through the U-shaped plate and the limiting template. The strip block is slidably connected to the limiting template. A circular fixing plate is fixedly sleeved on the strip block. A second clamping spring is sleeved on the strip block. The right end of the second clamping spring is fixedly connected to the circular fixing plate. The left end of the second clamping spring is fixedly connected to the limiting template. A second clamping plate is fixedly installed on the left end of the strip block. A plastic plate is provided on the left end of the second clamping plate.

[0009] Furthermore, a drive mechanism is provided within the bottom structure. The drive mechanism includes a heat transfer oil heating box and a perforated mounting plate fixedly installed within the bottom structure. The bottom end of the threaded rod is rotatably connected to the perforated mounting plate. A drive motor is fixedly installed on the top of the top structure. The threaded rod passes through the top structure and is fixedly connected to the output shaft of the drive motor. An adaptation spring is fixedly installed on the inner wall of the top of the top structure. The threaded rod passes through the adaptation spring. An adaptation block is threaded onto the threaded rod. The bottom end of the adaptation spring is fixedly connected to the adaptation block.

[0010] Furthermore, the top structure is provided with several voltage stabilizing mechanisms. Each voltage stabilizing mechanism includes a voltage stabilizing tube fixedly installed on the outer wall of the top structure. A perforated circular plate is fixedly installed inside the voltage stabilizing tube. A voltage stabilizing spring is fixedly installed on the left side of the perforated circular plate. A movable circular plate is fixedly installed on the left end of the voltage stabilizing spring. The movable circular plate is slidably connected to the voltage stabilizing tube. Several C-shaped rods are fixedly installed on the left end of the movable circular plate. The ends of the C-shaped rods that are far apart from each other all extend into the voltage stabilizing tube and are slidably connected to the voltage stabilizing tube.

[0011] Furthermore, the bottom of the central structure is provided with several transmission mechanisms. Each transmission mechanism includes a transmission box fixedly installed at the bottom of the central structure. A transmission spring is fixedly installed on the inner wall of the bottom of the transmission box. A transmission trapezoidal block is fixedly installed at the top of the transmission spring. The transmission trapezoidal block is slidably connected to the transmission box. The top of the transmission trapezoidal block extends into the central structure and is slidably connected to the central structure.

[0012] Furthermore, several of the transmission boxes are provided with a closing mechanism, the closing mechanism including limiting grooves respectively opened on the left side of the transmission box, connecting plates respectively fixedly installed on the left side of several transmission trapezoidal blocks, several connecting plates respectively passing through several limiting grooves and slidingly connected to several limiting grooves, annular closing plates fixedly installed on the left end of several connecting plates, several ventilation holes are opened on the central structure, and the top end of the annular closing plate extends into the central structure and closes the ventilation holes.

[0013] Furthermore, the top of the central structure is provided with several sealing mechanisms. Each sealing mechanism includes a sealing groove formed on the top of the central structure. Several sealing springs are fixedly installed on the inner wall of the left side of the sealing groove. A sealing plate is fixedly installed on the right end of each sealing spring. A toggle plate is fixedly installed on the sealing plate.

[0014] Furthermore, the bending device for producing plastic sheets comprises the following steps:

[0015] S1: First, move the actuating plate to place the plastic plate between clamping plate one and clamping plate two. The plastic plate is stably clamped by the elastic force of clamping spring one and clamping spring two. After releasing the actuating plate, the actuating plate will close the sealing groove under the elastic force of several sealing springs to improve the sealing performance of the device. Then, start the heat transfer oil heating box. During the heating process, heat is transferred from the heat transfer oil heating box to the device and is evenly heated by convection on several plastic plates in the middle structure. During the heating process, the air pressure inside the device will continuously increase. When the air pressure reaches a certain threshold... Air will push the movable circular plate away from the top structure through the perforated circular plate. When the movable circular plate slides on the C-shaped rod and leaves the pressure stabilizing tube, the gas that entered the pressure stabilizing tube will be discharged from the gap between the pressure stabilizing tube and the movable circular plate. Since the heat transfer oil heating box has a built-in temperature controller, as the temperature inside the device reaches a level sufficient to bend the plastic plate, the temperature controller will maintain a stable temperature inside the device. The stability of the temperature will also cause the air pressure inside the device to gradually stabilize. At this time, the movable circular plate will return in the opposite direction under the action of the pressure stabilizing spring, so that the gap between the pressure stabilizing tube and the movable circular plate is closed.

[0016] S2: After the plastic sheet reaches the bending requirement, start the drive motor. The drive motor drives the threaded rod to rotate, and the threaded rod drives the adapting block to descend. The adapting block will contact and push the ring block to descend. The ring block will drive several connecting rods to descend. The several connecting rods will drive several pushing blocks to move away from each other. The several pushing blocks will contact and push several clamping plates to move away from each other. The clamping plates will push the plastic sheet to move. During the movement of the plastic sheet, it will be bent under the action of the limiting template. The plastic sheet will drive the clamping plate to move until the clamping plate contacts the transmission trapezoidal block and makes it move, then it will stop.

[0017] S3: During the movement of clamping plate two, it will come into contact with the transmission trapezoidal block. Under the action of the inclined surface of the transmission trapezoidal block, clamping plate two will push the transmission trapezoidal block to descend. The transmission trapezoidal block will drive the connecting long plate to descend. The connecting long plate will drive the annular closed plate to descend and open several ventilation holes. During the rotation of the threaded rod, it will drive the central structure to rotate. The central structure will drive several plastic plates to rotate. Through the central structure, the plastic plates will accelerate the curing and cooling of the plastic plates under the action of centrifugal force. Since several ventilation holes have been opened, outside air will enter the device during the rotation of the central structure.

[0018] S4: Since the threads on the threaded rod are only distributed over a short distance and not completely on the entire rod, when the adapting block descends and leaves the threads on the threaded rod, the adapting block will be in a semi-detached state due to the elastic force of the adapting spring. At this time, the adapting block will not move up or down, and the annular block under the pushing action of the adapting block will remain stable, allowing the ventilation holes to open normally and the plastic sheet to bend smoothly. During this process, the threaded rod will continue to rotate and will not be affected by the adapting block. After the plastic sheet has cooled down, the reverse drive motor will reverse, and the threaded rod will drive the adapting block to rise. At this time, all the mechanisms of the device will return to their positions before heating, and the bent plastic sheet can be taken out.

[0019] The present invention has the following beneficial effects:

[0020] (1) The present invention provides a bending device for producing plastic sheets. A lever is actuated to place the plastic sheet between clamping plate one and clamping plate two. The plastic sheet is stably clamped by the elastic force of clamping spring one and clamping spring two. After the lever is released, the lever will close the sealing groove under the elastic force of several sealing springs, improving the sealing performance of the device. Then, the heat transfer oil heating box is started. During the heating process, heat is transferred from the heat transfer oil heating box to the device, and the plastic sheets in the central structure are uniformly heated by convection. During the heating process, the air pressure inside the device continuously increases. When the air pressure reaches a certain threshold, the air will pass through the perforated circular plate to circulate the heat. The movable circular plate is pushed away from the top structure. When the movable circular plate slides on the C-shaped rod and leaves the pressure stabilizing tube, the gas that has entered the pressure stabilizing tube will be discharged from the gap between the pressure stabilizing tube and the movable circular plate, thus creating a pressure relief effect. Since the heat transfer oil heating box has a built-in temperature controller, as the temperature inside the device reaches a level sufficient to bend the plastic plate, the temperature controller will maintain a stable temperature inside the device. The stability of the temperature will also cause the air pressure inside the device to gradually stabilize. At this time, the movable circular plate will return in the opposite direction under the action of the pressure stabilizing spring, so that the gap between the pressure stabilizing tube and the movable circular plate is closed, preventing outside air from entering the device and affecting the stable temperature of the softened plastic plate inside the device.

[0021] (2) The present invention provides a bending device for producing plastic sheets. After the plastic sheet meets the bending requirements, the drive motor is started. The drive motor drives the threaded rod to rotate. The threaded rod drives the adapting block to descend. The adapting block will contact and push the annular block to descend. The annular block will drive several connecting rods to descend. The several connecting rods will drive several pushing blocks to move away from each other. The several pushing blocks will contact and push several clamping plates to move away from each other. The clamping plates will push the plastic sheet to move. During the movement of the plastic sheet, it will be bent under the action of the limiting template. The plastic sheet will drive the clamping plate to move until the clamping plate contacts the transmission trapezoidal block and makes it move.

[0022] (3) In the bending device for producing plastic sheets of the present invention, during the movement of the clamping plate two, it will come into contact with the transmission trapezoidal block. Under the action of the inclined surface of the transmission trapezoidal block, the clamping plate two will push the transmission trapezoidal block to descend. The transmission trapezoidal block will drive the connecting long plate to descend. The connecting long plate will drive the annular closed plate to descend and open several ventilation holes. During the rotation of the threaded rod, it will drive the middle structure to rotate. The middle structure will drive several plastic sheets to rotate. Through the middle structure, the several plastic sheets will accelerate the curing and cooling of the plastic sheets under the action of centrifugal force. Since several ventilation holes have been opened, during the rotation of the middle structure, the outside air will enter the device, providing ventilation and cooling conditions for the cooling of the plastic sheets.

[0023] (4) The bending device for producing plastic sheets according to the present invention has a thread distribution on the threaded rod that is only a certain distance away and is not completely distributed on the threaded rod. When the adapting block descends and leaves the thread on the threaded rod, the adapting block will be in a semi-detached state due to the elastic force of the adapting spring. At this time, the adapting block will not move up and down, and at the same time, the ring block under the pushing action of the adapting block will remain stable, so that the ventilation hole can be opened normally and the plastic sheet can be bent smoothly. During this process, the threaded rod will continue to rotate and will not be affected by the adapting block. After the plastic sheet is cooled, the reverse drive motor will be reversed, and the threaded rod will drive the adapting block to rise. At this time, the various mechanisms of the device will return to the position before heating, and the bent plastic sheet can be taken out to complete the bending work, which greatly improves the bending efficiency.

[0024] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a front cross-sectional view of the present invention;

[0028] Figure 3 For the present invention Figure 2 A magnified structural diagram of A in the middle;

[0029] Figure 4 This is a schematic cross-sectional view of the internal structure of the present invention;

[0030] Figure 5 For the present invention Figure 4 A magnified structural diagram of B in the diagram;

[0031] Figure 6 For the present invention Figure 2 A magnified structural diagram of C;

[0032] Figure 7 For the present invention Figure 2 A magnified structural diagram of D in the diagram;

[0033] Figure 8 This is a schematic diagram of the method steps of the present invention.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] In the diagram: 1. Top structure; 100. Bending mechanism; 101. Bottom structure; 102. Middle structure; 103. Threaded rod; 104. Grooved circular block; 105. Telescopic spring; 106. Ring block; 107. Connecting rod; 108. Fixing plate; 109. Clamping spring one; 110. Clamping plate one; 111. Pushing block; 2. Clamping mechanism; 201. Limiting template; 202. C-shaped plate; 203. Strip block; 204. Circular fixing plate; 205. Clamping spring two; 206. Clamping plate two; 207. Plastic plate; 3. Drive mechanism; 301. Heat transfer oil heating box; 3 02. Mounting plate with holes; 303. Drive motor; 304. Adaptive spring; 305. Adaptive block; 4. Voltage stabilizing mechanism; 401. Voltage stabilizing tube; 402. Perforated circular plate; 403. Voltage stabilizing spring; 404. Movable circular plate; 405. C-shaped circular rod; 5. Transmission mechanism; 501. Transmission box; 502. Transmission spring; 503. Transmission trapezoidal block; 6. Closing mechanism; 601. Limiting groove; 602. Connecting long plate; 603. Annular closing plate; 604. Ventilation hole; 7. Sealing mechanism; 701. Sealing groove; 702. Sealing spring; 703. Sealing plate; 704. Actuating plate. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1 - Figure 8 As shown, the present invention is a bending device for producing plastic sheets, including a top structure 1, on which a bending mechanism 100 is disposed. The bending mechanism 100 includes a bottom structure 101 disposed below the top structure 1, a middle structure 102 rotatably mounted on the top of the bottom structure 101, and the top of the middle structure 102 rotatably connected to the top structure 1. The device also includes:

[0038] A threaded rod 103 is rotatably mounted on the inner top wall of the top structure 1. A grooved circular block 104 is fixedly sleeved on the threaded rod 103. A telescopic spring 105 is fixedly mounted on the inner bottom wall of the grooved circular block 104. An annular block 106 is fixedly mounted on the top of the telescopic spring 105. The annular block 106 and the grooved circular block 104 are slidably connected. Several connecting rods 107 are hingedly mounted on the annular block 106. Several fixing plates 108 are fixedly mounted on the inner bottom wall of the middle structure 102. Clamping springs 109 are fixedly mounted on the opposite sides of the fixing plates 108. Clamping plates 110 are fixedly mounted on the opposite ends of the clamping springs 109. Pushing blocks 111 are hingedly mounted on the opposite ends of the connecting rods 107. The pushing blocks 111 pass through the fixing plates 108 and are slidably connected to the fixing plates 108.

[0039] like Figure 5 As shown, several clamping mechanisms 2 are provided on the bottom inner wall of the middle structure 102. A limiting template 201 is fixedly installed on the top of the middle structure 102. A U-shaped plate 202 is fixedly installed on the back of the limiting template 201. A strip block 203 is slidably installed on the U-shaped plate 202. The strip block 203 passes through the U-shaped plate 202 and the limiting template 201. The strip block 203 is slidably connected to the limiting template 201. A circular fixing plate 204 is fixedly sleeved on the strip block 203. A clamping spring 205 is sleeved on the strip block 203. The right end of the clamping spring 205 is fixedly connected to the circular fixing plate 204. The left end of the clamping spring 205 is fixedly connected to the limiting template 201. A clamping plate 206 is fixedly installed on the left end of the strip block 203. A plastic plate 207 is provided on the left end of the clamping plate 206.

[0040] The plastic plate 207 is placed between the clamping plate 110 and the clamping plate 206. The plastic plate 207 is stably clamped by the elastic force of the clamping spring 109 and the clamping spring 205.

[0041] like Figure 2 As shown, a drive mechanism 3 is provided inside the bottom structure 101. The drive mechanism 3 includes a heat transfer oil heating box 301 and a perforated mounting plate 302 fixedly installed inside the bottom structure 101. The bottom end of the threaded rod 103 is rotatably connected to the perforated mounting plate 302. A drive motor 303 is fixedly installed on the top of the top structure 1. The threaded rod 103 passes through the top structure 1 and is fixedly connected to the output shaft of the drive motor 303. An adaptation spring 304 is fixedly installed on the top inner wall of the top structure 1. The threaded rod 103 passes through the adaptation spring 304. An adaptation block 305 is threaded on the threaded rod 103. The bottom end of the adaptation spring 304 is fixedly connected to the adaptation block 305.

[0042] During the heating process, heat is transferred from the heat transfer oil heating box 301 to the device and is uniformly heated to several plastic plates 207 in the central structure 102 through convection. Since the threads on the threaded rod 103 are only distributed over a short distance and are not completely distributed on the threaded rod 103, when the adapting block 305 descends and leaves the threads on the threaded rod 103, the adapting block 305 will be in a semi-detached state due to the elastic force of the adapting spring 304. At this time, the adapting block 305 will not move up and down, and at the same time, it will ensure that the annular block 106 remains stable under the pushing action of the adapting block 305, so that the ventilation hole 604 can be opened normally and the plastic plate 207 can be bent smoothly. During this process, the threaded rod 103 will continue to rotate and will not be affected by the adapting block 305.

[0043] like Figure 6 As shown, a plurality of pressure stabilizing mechanisms 4 are provided on the top structure 1. Each pressure stabilizing mechanism 4 includes a pressure stabilizing tube 401 fixedly installed on the outer wall of the top structure 1. A perforated circular plate 402 is fixedly installed inside the pressure stabilizing tube 401. A pressure stabilizing spring 403 is fixedly installed on the left side of the perforated circular plate 402. A movable circular plate 404 is fixedly installed on the left end of the pressure stabilizing spring 403. The movable circular plate 404 is slidably connected to the pressure stabilizing tube 401. A plurality of U-shaped circular rods 405 are fixedly installed on the left end of the movable circular plate 404. The ends of the plurality of U-shaped circular rods 405 that are far apart from each other all extend into the pressure stabilizing tube 401 and are slidably connected to the pressure stabilizing tube 401.

[0044] When the air pressure reaches a certain threshold, the air will push the movable circular plate 404 away from the top structure 1 through the perforated circular plate 402. When the movable circular plate 404 slides on the U-shaped circular rod 405 and leaves the pressure stabilizing tube 401, the gas that entered the pressure stabilizing tube 401 will be discharged from the gap between the pressure stabilizing tube 401 and the movable circular plate 404, thus creating a pressure relief effect. When the temperature reaches a sufficient level to bend the plastic plate 207, the air pressure in the device will gradually stabilize. At this time, the movable circular plate 404 will return in the opposite direction under the action of the pressure stabilizing spring 403, so that the gap between the pressure stabilizing tube 401 and the movable circular plate 404 is closed, preventing outside air from entering the device and affecting the stable temperature of the softened plastic plate 207 in the device.

[0045] like Figure 7 As shown, a plurality of transmission mechanisms 5 are provided at the bottom of the central structure 102. The transmission mechanism 5 includes a transmission box 501 fixedly installed at the bottom of the central structure 102. A transmission spring 502 is fixedly installed on the inner wall of the bottom of the transmission box 501. A transmission trapezoidal block 503 is fixedly installed at the top of the transmission spring 502. The transmission trapezoidal block 503 is slidably connected to the transmission box 501. The top of the transmission trapezoidal block 503 extends into the central structure 102 and is slidably connected to the central structure 102.

[0046] During the movement of clamping plate 206, it will come into contact with transmission trapezoidal block 503. Under the action of the inclined surface of transmission trapezoidal block 503, clamping plate 206 will push transmission trapezoidal block 503 to descend.

[0047] like Figure 7 As shown, several transmission boxes 501 are provided with a closing mechanism 6. The closing mechanism 6 includes a limiting groove 601 respectively opened on the left side of the transmission box 501. Several transmission trapezoidal blocks 503 are respectively fixedly installed with connecting long plates 602 on the left side. Several connecting long plates 602 pass through several limiting grooves 601 and are slidably connected to several limiting grooves 601. Several annular closing plates 603 are fixedly installed on the left end of several connecting long plates 602. Several ventilation holes 604 are opened on the central structure 102. The top end of the annular closing plate 603 extends into the central structure 102 and closes the ventilation holes 604.

[0048] The transmission trapezoidal block 503 drives the connecting long plate 602 to descend, which in turn drives the annular closing plate 603 to descend, opening several ventilation holes 604. During the rotation of the threaded rod 103, the central structure 102 is driven to rotate, which in turn drives several plastic plates 207 to rotate. Through the centrifugal force, the plastic plates 207 are accelerated to solidify and cool down. Since the ventilation holes 604 are open, outside air enters the device during the rotation of the central structure 102, providing ventilation and cooling conditions for the plastic plates 207.

[0049] like Figure 2 As shown, the top of the central structure 102 is provided with several sealing mechanisms 7. Each sealing mechanism 7 includes a sealing groove 701 opened on the top of the central structure 102. Several sealing springs 702 are fixedly installed on the inner wall of the left side of the sealing groove 701. A sealing plate 703 is fixedly installed on the right end of the several sealing springs 702. A toggle plate 704 is fixedly installed on the sealing plate 703.

[0050] After the toggle plate 704 is released, the toggle plate 704 will close the sealing groove 701 under the elastic force of several sealing springs 702 to improve the sealing performance of the device and ensure that the temperature inside the device is not affected by the outside.

[0051] like Figure 1-8 The bending device for producing plastic sheets shown is described below, and the method steps are as follows:

[0052] S1: First, move the actuating plate 704 to place the plastic plate 207 between the clamping plate 110 and the clamping plate 206. The plastic plate 207 is stably clamped by the elastic force of the clamping springs 109 and 205. After releasing the actuating plate 704, the actuating plate 704 will close the sealing groove 701 under the elastic force of several sealing springs 702 to improve the sealing performance of the device. Then, start the heat transfer oil heating box 301. During the heating process, heat is transferred from the heat transfer oil heating box 301 to the device and is evenly heated by convection to the several plastic plates 207 in the middle structure 102. During the heating process, the air pressure inside the device will continuously increase. When the air pressure reaches a certain level... When the threshold is set, the air will push the movable circular plate 404 away from the top structure 1 through the perforated circular plate 402. When the movable circular plate 404 slides on the U-shaped circular rod 405 and leaves the pressure stabilizing tube 401, the gas that entered the pressure stabilizing tube 401 will be discharged from the gap between the pressure stabilizing tube 401 and the movable circular plate 404. Since the heat transfer oil heating box 301 has a built-in temperature controller, as the temperature inside the device reaches a sufficient level to bend the plastic plate 207, the temperature controller will maintain a stable temperature inside the device. The stability of the temperature will also gradually stabilize the air pressure inside the device. At this time, the movable circular plate 404 will return in the opposite direction under the action of the pressure stabilizing spring 403, so that the gap between the pressure stabilizing tube 401 and the movable circular plate 404 is closed.

[0053] S2: After the plastic plate 207 reaches the bending requirement, the drive motor 303 is started. The drive motor 303 drives the threaded rod 103 to rotate. The threaded rod 103 drives the adapting block 305 to descend. The adapting block 305 will contact and push the annular block 106 to descend. The annular block 106 will drive several connecting rods 107 to descend. The several connecting rods 107 will drive several pushing blocks 111 to move away from each other. The several pushing blocks 111 will contact and push several clamping plates 110 to move away from each other. The clamping plates 110 will push the plastic plate 207 to move. During the movement of the plastic plate 207, it will be bent under the action of the limiting template 201. The plastic plate 207 will drive the clamping plate 206 to move until the clamping plate 206 contacts the transmission trapezoidal block 503 and makes it move, then it will stop.

[0054] S3: During the movement of the clamping plate 206, it will come into contact with the transmission trapezoidal block 503. Under the action of the inclined surface of the transmission trapezoidal block 503, the clamping plate 206 will push the transmission trapezoidal block 503 to descend. The transmission trapezoidal block 503 will drive the connecting long plate 602 to descend. The connecting long plate 602 will drive the annular closing plate 603 to descend and open several ventilation holes 604. During the rotation of the threaded rod 103, it will drive the central structure 102 to rotate. The central structure 102 will drive several plastic plates 207 to rotate. Through the central structure 102 driving several plastic plates 207, the solidification and cooling of the plastic plates 207 will be accelerated under the action of centrifugal force. Since several ventilation holes 604 have been opened, outside air will enter the device during the rotation of the central structure 102.

[0055] S4: Since the threads on the threaded rod 103 are only distributed over a short distance and not completely distributed on the threaded rod 103, when the adapting block 305 descends and leaves the threads on the threaded rod 103, the adapting block 305 will be in a semi-disengaged state due to the elastic force of the adapting spring 304. At this time, the adapting block 305 will not move up and down, and at the same time, it will ensure that the annular block 106 remains stable under the pushing action of the adapting block 305, so that the ventilation hole 604 can be opened normally and the plastic plate 207 can be bent smoothly. During this process, the threaded rod 103 will continue to rotate and will not be affected by the adapting block 305. After the plastic plate 207 has cooled down, the reverse drive motor 303 will reverse, and the threaded rod 103 will drive the adapting block 305 to rise. At this time, the various mechanisms of the device will return to the position before heating, and the bent plastic plate 207 can be taken out.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bending device for producing plastic sheets, comprising a top structure (1), wherein a bending mechanism (100) is provided on the top structure (1), the bending mechanism (100) comprising a bottom structure (101) disposed below the top structure (1), a middle structure (102) being rotatably mounted on the top of the bottom structure (101), the top of the middle structure (102) being rotatably connected to the top structure (1), characterized in that, Also includes: A threaded rod (103) is rotatably mounted on the inner top wall of the top structure (1). A grooved circular block (104) is fixedly sleeved on the threaded rod (103). A telescopic spring (105) is fixedly mounted on the inner bottom wall of the grooved circular block (104). An annular block (106) is fixedly mounted on the top of the telescopic spring (105). The annular block (106) is slidably connected to the grooved circular block (104). Several connecting rods (107) are hinged on the annular block (106). The middle structure (102) A plurality of fixed plates (108) are fixedly installed on the bottom inner wall of the ), and clamping springs (109) are fixedly installed on the side of the plurality of fixed plates (108) that are far apart from each other. Clamping plates (110) are fixedly installed on the ends of the plurality of clamping springs (109) that are far apart from each other. Pushing blocks (111) are hinged to the ends of the plurality of connecting rods (107) that are far apart from each other. The pushing blocks (111) pass through the plurality of fixed plates (108) and are slidably connected to the plurality of fixed plates (108). Several clamping mechanisms (2) are provided on the bottom inner wall of the central structure (102). A limiting template (201) is fixedly installed on the top of the central structure (102). A U-shaped plate (202) is fixedly installed on the back of the limiting template (201). A strip block (203) is slidably installed on the U-shaped plate (202). The strip block (203) penetrates the U-shaped plate (202) and the limiting template (201). The strip block (203) slides with the limiting template (201). The strip block (203) is fixedly fitted with a circular fixing plate (204), and a clamping spring (205) is fitted on the strip block (203). The right end of the clamping spring (205) is fixedly connected to the circular fixing plate (204), and the left end of the clamping spring (205) is fixedly connected to the limiting template (201). A clamping plate (206) is fixedly installed on the left end of the strip block (203), and a plastic plate (207) is provided on the left end of the clamping plate (206). The bottom structure (101) is provided with a drive mechanism (3). The drive mechanism (3) includes a heat transfer oil heating box (301) and a perforated mounting plate (302) fixedly installed in the bottom structure (101). The bottom end of the threaded rod (103) is rotatably connected to the perforated mounting plate (302). The top of the top structure (1) is fixedly installed with a drive motor (303). The threaded rod (103) passes through the top structure (1) and is fixedly connected to the output shaft of the drive motor (303). An adaptation spring (304) is fixedly installed on the top inner wall of the top structure (1). The threaded rod (103) passes through the adaptation spring (304). An adaptation block (305) is threaded on the threaded rod (103). The bottom end of the adaptation spring (304) is fixedly connected to the adaptation block (305).

2. The bending device for producing plastic sheets according to claim 1, characterized in that: The top structure (1) is provided with several voltage stabilizing mechanisms (4). Each voltage stabilizing mechanism (4) includes a voltage stabilizing tube (401) fixedly installed on the outer wall of the top structure (1). A perforated circular plate (402) is fixedly installed inside the voltage stabilizing tube (401). A voltage stabilizing spring (403) is fixedly installed on the left side of the perforated circular plate (402). A movable circular plate (404) is fixedly installed on the left end of the voltage stabilizing spring (403). The movable circular plate (404) is slidably connected to the voltage stabilizing tube (401). Several U-shaped circular rods (405) are fixedly installed on the left end of the movable circular plate (404). The ends of the U-shaped circular rods (405) that are far apart from each other all extend into the voltage stabilizing tube (401) and are slidably connected to the voltage stabilizing tube (401).

3. The bending device for producing plastic sheets according to claim 2, characterized in that: The bottom of the central structure (102) is provided with a plurality of transmission mechanisms (5). The transmission mechanism (5) includes a transmission box (501) fixedly installed at the bottom of the central structure (102). A transmission spring (502) is fixedly installed on the inner wall of the bottom of the transmission box (501). A transmission trapezoidal block (503) is fixedly installed at the top of the transmission spring (502). The transmission trapezoidal block (503) is slidably connected to the transmission box (501). The top of the transmission trapezoidal block (503) extends into the central structure (102) and is slidably connected to the central structure (102).

4. A bending device for producing plastic sheets according to claim 3, characterized in that: A closing mechanism (6) is provided on several of the transmission boxes (501). The closing mechanism (6) includes a limiting groove (601) respectively opened on the left side of the transmission box (501). A connecting long plate (602) is fixedly installed on the left side of several transmission trapezoidal blocks (503). The connecting long plates (602) pass through several limiting grooves (601) and are slidably connected to several limiting grooves (601). An annular closing plate (603) is fixedly installed on the left end of several connecting long plates (602). A number of ventilation holes (604) are opened on the central structure (102). The top end of the annular closing plate (603) extends into the central structure (102) and closes the ventilation holes (604).

5. A bending device for producing plastic sheets according to claim 4, characterized in that: The top of the central structure (102) is provided with several sealing mechanisms (7). The sealing mechanism (7) includes a sealing groove (701) opened on the top of the central structure (102). Several sealing springs (702) are fixedly installed on the inner wall of the left side of the sealing groove (701). A sealing plate (703) is fixedly installed on the right end of the several sealing springs (702). A toggle plate (704) is fixedly installed on the sealing plate (703).

6. A method of using a bending device for producing plastic sheets, comprising the bending device for producing plastic sheets as described in claim 5, characterized in that, The steps are as follows: S1: First, move the actuating plate (704) to place the plastic plate (207) between clamping plate one (110) and clamping plate two (206). The plastic plate (207) is stably clamped by the elastic force of clamping spring one (109) and clamping spring two (205). After releasing the actuating plate (704), the actuating plate (704) will close the sealing groove (701) under the elastic force of several sealing springs (702) to improve the sealing performance of the device. Then, start the heat transfer oil heating box (301). During the heating process, the heat from the heat transfer oil heating box (301) is transferred to the device and is uniformly heated by convection on several plastic plates (207) in the middle structure (102). During the heating process, the air pressure in the device will continuously increase. When the air pressure reaches At a certain threshold, air will push the movable circular plate (404) away from the top structure (1) through the perforated circular plate (402). When the movable circular plate (404) slides on the U-shaped circular rod (405) and leaves the pressure stabilizing tube (401), the gas entering the pressure stabilizing tube (401) will be discharged from the gap between the pressure stabilizing tube (401) and the movable circular plate (404). Since the heat transfer oil heating box (301) has a built-in temperature controller, as the temperature inside the device reaches a sufficient level, the temperature controller will maintain the stable temperature inside the device. The stability of the temperature will also gradually stabilize the air pressure inside the device. At this time, the movable circular plate (404) will return in the opposite direction under the action of the pressure stabilizing spring (403), so that the gap between the pressure stabilizing tube (401) and the movable circular plate (404) is closed. S2: After the plastic sheet (207) reaches the bending requirement, start the drive motor (303). The drive motor (303) drives the threaded rod (103) to rotate. The threaded rod (103) drives the adapting block (305) to descend. The adapting block (305) will contact and push the annular block (106) to descend. The annular block (106) will drive several connecting rods (107) to descend. The several connecting rods (107) will drive several pushing blocks (111) to move away from each other. If The push block (111) will contact and push several clamping plates (110) away from each other. The clamping plates (110) will push the plastic plate (207) to move. During the movement of the plastic plate (207), it will be bent by the limiting template (201). The plastic plate (207) will drive the clamping plate (206) to move until the clamping plate (206) contacts the transmission trapezoidal block (503) and makes it move. S3: During the movement of clamping plate two (206), it will come into contact with transmission trapezoidal block (503). Under the action of the inclined surface of transmission trapezoidal block (503), clamping plate two (206) will push transmission trapezoidal block (503) down. Transmission trapezoidal block (503) will drive connecting long plate (602) down. Connecting long plate (602) will drive annular closed plate (603) down to open several ventilation holes (604). During the rotation of threaded rod (103), it will drive the middle structure (102) to rotate. The middle structure (102) will drive several plastic plates (207) to rotate. Through the middle structure (102), the several plastic plates (207) will accelerate the solidification and cooling of plastic plates (207) under the action of centrifugal force. Since several ventilation holes (604) have been opened, during the rotation of the middle structure (102), outside air will enter the device. S4: When the adapting block (305) descends and leaves the thread on the threaded rod (103), the adapting block (305) will be in a semi-detached state due to the elastic force of the adapting spring (304). At this time, the adapting block (305) will not move up and down, and at the same time, the ring block (106) under the pushing action of the adapting block (305) will remain stable, so that the ventilation hole (604) can be opened normally and the plastic plate (207) can be bent smoothly. During this process, the threaded rod (103) will continue to rotate and will not be affected by the adapting block (305). After the plastic plate (207) has cooled down, the reverse drive motor (303) will be reversed, and the threaded rod (103) will drive the adapting block (305) to rise. At this time, the various mechanisms of the device will return to the position before heating, and the bent plastic plate (207) can be taken out.

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