A plastic plate hot press forming device and a method of using the same

Abstract

The application relates to the technical field of hot-press forming devices, in particular to a plastic plate hot-press forming device and a using method thereof, which comprises an operation table, a truss, a moving and transferring assembly, a to-be-processed assembly, a heating assembly and a mould pressing assembly. The moving and transferring assembly comprises a support, the surface of the support is fixedly connected with a first electric push rod, the output end of the first electric push rod is fixedly connected with a lifting frame, the surface of the lifting frame is fixedly connected with a hook belt, the to-be-processed assembly comprises a cloth bag, the cloth bag is hinged to the hook belt, the inner wall of the cloth bag is slidably connected with a thick plastic plate, and the heating assembly comprises a second electric push rod. When the thick plastic plate is processed, the thick plastic plate after being heated can be automatically moved from the heating assembly to the mould pressing assembly, the moving speed is faster, the hardening of the thick plastic plate due to untimely transfer can be avoided, and the subsequent mould pressing quality and efficiency are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot press forming device, and particularly relates to a plastic plate hot press forming device and a use method thereof. BACKGROUND

[0002] Hot press forming is a common plastic processing technology, which is mainly used for heating plastic plates to a certain temperature and then forming into a required shape under pressure. When processing thick plastic plates, the thick plastic plates are placed into a heating device and uniformly heated to their softening temperature. Then the softened thick plastic plates are placed into a forming mold, pressure is applied to make them form according to the shape of the mold. After keeping under pressure for a period of time, the mold is removed, and the finished product is allowed to cool naturally or the cooling process is accelerated by using a cooling device.

[0003] The above and the prior art have the following defects: During the operation process, the heated thick plastic plates need to be manually moved into the mold for processing, which may cause the thick plastic plates to harden due to a long time consumption, and then cause cracks in the molded thick plastic plates, thereby seriously reducing the quality and processing efficiency of the thick plastic plates.

[0004] Therefore, the present application provides a plastic plate hot press forming device and a use method thereof. SUMMARY

[0005] The present application aims to solve the problem that the heated thick plastic plates need to be manually moved into the mold for processing, which may cause the thick plastic plates to harden due to a long time consumption, and then cause cracks in the molded thick plastic plates, thereby seriously reducing the quality and processing efficiency of the thick plastic plates.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a plastic sheet hot pressing molding device and its method of use, comprising an operating table, a truss, a transfer assembly, a component to be processed, a heating assembly, and a molding assembly. The transfer assembly includes a support, a first electric push rod fixedly connected to the surface of the support, a lifting frame fixedly connected to the output end of the first electric push rod, and a hook strap fixedly connected to the surface of the lifting frame. The component to be processed includes a cloth bag, which is engaged with the hook strap. A thick plastic sheet is slidably connected to the inner wall of the cloth bag. The heating assembly includes a second electric push rod, which is fixedly connected to the truss. The output end of the second electric push rod... An upper heat-conducting plate is fixedly connected to the output end, and an upper electric heating tube is inserted inside the upper heat-conducting plate. A lower heat-conducting plate is fixedly connected to the surface of the operating table, and a lower electric heating tube is inserted inside the lower heat-conducting plate. The molding assembly includes a hydraulic press, which is fixedly connected to a truss. An upper mold is fixedly connected to the output end of the hydraulic press, and an upper cooling coil is inserted inside the upper mold. A lower mold is fixedly connected to the surface of the operating table, and a lower cooling coil is inserted inside the lower mold. Both the upper and lower heating plates are made of aluminum alloy. The material of the thick plastic sheet includes, but is not limited to, polycarbonate, acrylonitrile-butadiene-styrene copolymer, and polymethyl methacrylate, and also includes:

[0007] A transfer structure for automatically transferring thick plastic sheets is provided on the surface of the bracket. The transfer structure includes a fixed plate fixedly installed on the surface of the bracket, a gear and rack frame for driving the bracket to move, and a guide rod for limiting the movement path of the bracket.

[0008] A cleaning structure disposed on the surface of the fixed plate for cleaning foreign objects from the surface of the rack frame, the cleaning structure including a mounting plate fixedly installed on the surface of the fixed plate and a scraper for scraping away foreign objects.

[0009] The effects achieved by the above components are as follows: By setting up a transfer structure, when processing thick plastic sheets, the heated thick plastic sheets can be automatically moved from the heating component to the molding component. The movement speed is faster, avoiding the situation where the thick plastic sheets harden due to untimely transfer, thereby ensuring the quality and efficiency of subsequent molding. By setting up a cleaning structure, during the movement of the bracket, the scraper will scrape off foreign objects attached to the tooth surface of the rack frame, preventing foreign objects from adhering to the tooth surface of the rack frame and affecting the normal meshing of the gear and rack frame, thereby improving the stability of gear operation.

[0010] Preferably, a servo motor is fixedly connected to the surface of the fixed plate, the output end of the servo motor is fixedly connected to a gear, the operating table is fixedly connected to the rack frame, the gear meshes with the rack frame, both ends of the guide rod are fixedly connected to the operating table, the guide rod passes through the bracket, a limit plate is fixedly connected to the surface of the fixed plate, both ends of the limit plate are rotatably connected to rollers, a bent plate is fixedly connected to the surface of the operating table, a slide rod slides through the bent plate, a strip plate is fixedly connected to one end of the slide rod, a fixed block is fixedly connected to the surface of the strip plate, a round rod slides through the strip plate, a moving block is fixedly connected to one end of the round rod, the moving block is slidably connected to the strip plate, both the fixed block and the moving block have inclined surfaces, an iron sheet is fixedly connected to the surface of the strip plate, an electromagnet is fixedly connected to the surface of the bent plate, a first spring is fixedly connected to the surface of the strip plate, and the other end of the first spring is fixedly connected to the bent plate.

[0011] The effects achieved by the above components are as follows: When the servo motor is turned on, the output end of the servo motor rotates, which drives the gear to rotate. At this time, the gear moves along the surface of the rack frame, the servo motor drives the fixed plate to move, and the fixed plate drives the bracket to slide along the arc surface of the guide rod, thereby quickly moving the position of the thick plastic sheet. During this process, the fixed plate drives the limiting plate to move, and the movement of the limiting plate drives the roller to move. When the roller contacts the inclined surface of the fixed block, the roller will squeeze the fixed block, and the fixed block will move away from the rack frame. The movement of the fixed block will drive the strip plate to move, and the strip plate will drive the slide rod to slide along the inside of the bent plate. The slide rod achieves the function of limiting the movement path of the strip plate. The movement of the strip plate will compress the first spring. At this time, the first spring is in a compressed state. After that, the limiting plate will disengage from the inclined surface of the fixed block, and the fixed block will abut against the surface of the limiting plate. Then the limiting plate... The moving block will contact the fixed block, which will slide along the surface of the strip due to compression. When the moving block contacts the strip, the strip will prevent the moving block from moving further. At this time, the limiting plate and the roller will disengage from the fixed block, and the first spring will start to extend. The side of the moving block and the fixed block that is close to each other will contact the two rollers respectively. The rollers can reduce the friction between the limiting plate and the fixed block and the moving block. At this time, the moving block and the fixed block will cooperate to restrict the position of the limiting plate, thereby restricting the position of the bracket, so that the thick plastic sheet can be accurately moved above the lower heating plate, improving the processing accuracy. After heating is completed, the electromagnet is turned on, and the electromagnet will attract the iron plate. The iron plate will drive the strip to move, so that the fixed block and the moving block no longer restrict the position of the limiting plate. Then, the servo motor can be controlled to continue to drive the bracket to move, thereby quickly transferring the thick plastic sheet to the molding assembly.

[0012] Preferably, a second spring is fitted onto the arc surface of the round rod, and the two ends of the second spring are fixedly connected to the round rod and the strip plate, respectively.

[0013] The effect achieved by the above components is as follows: the round rod moves with the moving block and stretches the second spring. The second spring uses its own elasticity to slow down the moving speed of the moving block, thereby slowing down the sliding speed of the limiting plate, which makes it easier to limit the position of the limiting plate in the future.

[0014] Preferably, a stop block is fixedly connected to the surface of the strip plate, and the distance between the stop block and the fixed block is less than the length of the limiting plate.

[0015] The effect achieved by the above components is that, since the distance between the moving block and the fixed block is less than the length of the limiting plate, the limiting plate is not restricted by the moving block and the fixed block, thus facilitating the movement and reset of the bracket.

[0016] Preferably, a rotating block is rotatably connected inside the mounting plate, a connecting rod is fixedly connected to one end of the rotating block, a sleeve is slidably connected to the surface of the connecting rod, the sleeve is fixedly connected to the scraper, and a bolt is threaded into the connecting rod.

[0017] The effect achieved by the above components is as follows: during the movement of the bracket, the fixed plate will drive the mounting plate to move, the mounting plate will drive the rotating block to move, the rotating block will drive the connecting rod to move, the connecting rod will drive the sleeve to move, the sleeve will drive the scraper to slide along the tooth surface of the rack frame, and the scraper will scrape off the foreign matter attached to the tooth surface of the rack frame.

[0018] Preferably, the arc surface of the rotating block is fitted with a torsion spring, and the two ends of the torsion spring are fixedly connected to the support plate and the rotating block, respectively.

[0019] The effect achieved by the above components is as follows: the torsion spring will drive the rotating block to rotate with its own torque, the rotating block will drive the connecting rod to rotate, and the sleeve will rotate with the connecting rod to make the scraper press against the tooth surface of the rack frame.

[0020] Preferably, the vertical cross-section of the scraper is arc-shaped, and the scraper is made of an elastic material.

[0021] The effect achieved by the above components is that the scraper with a vertical cross-section in the shape of an arc will move the foreign object, and due to the obstruction of the scraper, the foreign object will fall to both sides of the rack frame.

[0022] A method of using a plastic sheet thermoforming apparatus includes the following steps:

[0023] S1. Place the thick plastic sheet that needs to be thermoformed into a pre-sewn cloth bag to complete a component to be processed.

[0024] S2. Use the hook strap to limit the cloth bag, and use the first electric push rod to raise the lifting frame so that the component to be processed is higher than the lower heating plate;

[0025] S3. Turn on the servo motor and use the gear and rack frame to transfer the component to be processed to the middle of the preheated and fixed-temperature upper heating plate and lower heating plate. The fixed block, moving block and limiting plate work together to accurately limit the position of the bracket. The scraper will scrape off the foreign objects attached to the tooth surface of the rack frame in time. The first electric push rod moves the lifting frame down so that the cloth bag contacts the lower heating plate. The second electric push rod is controlled to press down the upper heating plate so that it contacts the cloth bag.

[0026] S4. Based on the material characteristics of the thick plastic sheet, turn on the upper and lower heating tubes, and use the upper and lower heating plates to heat the thick plastic sheet to a suitable temperature.

[0027] S5. After heating is complete, raise the lifting frame again so that the component to be processed is higher than the lower mold. Then move the component to be processed above the lower mold and lower the lifting frame so that the cloth bag contacts the lower mold.

[0028] S6. The upper mold is pressed down by the hydraulic press to close the mold. At the same time, coolant is introduced into the upper and lower cooling coils to cool and lower the mold, thereby reducing the temperature of the thick plastic sheet to the setting temperature.

[0029] S7. Open the mold of the molding component, and then use the first electric push rod to move the component to be processed out of the lower mold;

[0030] S8. Control the output of the servo motor to rotate in the opposite direction and move the bracket to a suitable position;

[0031] S9. Remove the cloth bag and take out the thick plastic sheet from the bag to complete the hot pressing process.

[0032] Preferably, the bag is made of two overlapping and aligned high-temperature resistant fleece fabrics, and three positioning edges are processed by sewing according to the size of the thick plastic sheet. The upper and lower heating tubes are controlled by an intelligent temperature controller, the model of which includes, but is not limited to, XMTA-2201. The upper and lower molds are controlled by a mold temperature controller, the model of which includes, but is not limited to, STM-900W.

[0033] Preferably, step S3 specifically comprises:

[0034] The heating temperature for the thick plastic sheet made of polycarbonate is 157–163°C.

[0035] The heating temperature for the thick plastic sheet material being acrylonitrile-butadiene-styrene copolymer is 135-140°C.

[0036] The heating temperature for the thick plastic sheet material being polymethyl methacrylate is 105–110°C.

[0037] The heating conditions for the thick plastic sheet must be adjusted by fine-tuning the temperature and controlling the heating time according to the specific molding shape of the molding component and the thickness requirements of the sheet.

[0038] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0039] 1. In this invention, by setting a transfer structure, when processing thick plastic sheets, the heated thick plastic sheets can be automatically moved from the heating component to the molding component. The moving speed is faster, which avoids the situation where the thick plastic sheets harden due to untimely transfer, thereby ensuring the quality and efficiency of subsequent molding.

[0040] 2. In this invention, by setting up a cleaning structure, the scraper will scrape off foreign objects attached to the tooth surface of the rack frame during the movement of the bracket, so as to avoid foreign objects from being attached to the tooth surface of the rack frame and affecting the normal meshing of the gear and the rack frame, thereby improving the stability of the gear during operation. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 This is a structural schematic diagram of the operating platform and truss of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure at the truss section of the present invention;

[0044] Figure 4 This is a schematic diagram of the structure of the operating table of the present invention;

[0045] Figure 5 This is a schematic diagram of the structure of the bracket and guide rod of the present invention;

[0046] Figure 6 This is a schematic diagram of the structure of the bracket in this invention;

[0047] Figure 7 For the present invention Figure 5 Enlarged view of point A in the middle;

[0048] Figure 8 This is a schematic diagram of the structure at the fixing plate of the present invention;

[0049] Figure 9 This is a schematic diagram of the structure at the bent plate of the present invention;

[0050] Figure 10 This is a structural schematic diagram of the bent plate of the present invention at another angle;

[0051] Figure 11 This is a schematic diagram of the disassembled structure of the support plate of the present invention.

[0052] Legend: 1. Operating table; 2. Truss; 3. Transfer assembly; 31. Support; 32. First electric actuator; 33. Lifting frame; 34. Hook belt; 4. Assembly to be processed; 41. Cloth bag; 42. Thick plastic sheet; 5. Heating assembly; 51. Second electric actuator; 52. Upper heating plate; 53. Upper heating element; 54. Lower heating plate; 55. Lower heating element; 6. Molding assembly; 61. Hydraulic press; 62. Upper mold; 63. Upper cooling coil; 64. Lower mold; 65. Lower cooling coil; 7. Transfer structure; 701. Fixing plate; 702. Servo motor; 703. Gear; 704. Rack frame; 705. Guide rod; 706. Limiting plate; 707. Bending plate; 708. Slide rod; 709. Strip plate; 710. Fixing block; 711. Round rod; 712. Moving block; 713. Iron sheet; 714. Electromagnet; 715. First spring; 716. Second spring; 717. Stop block; 718. Roller; 8. Cleaning structure; 81. Mounting plate; 82. Rotating block; 83. Connecting rod; 84. Sleeve; 85. Scraper; 86. Bolt; 87. Torsion spring. Detailed Implementation

[0053] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0054] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0055] like Figures 1-11As shown, the present invention provides a plastic sheet thermoforming device and its usage method, including an operating table 1, a truss 2, a transfer assembly 3, a component to be processed 4, a heating assembly 5, and a molding assembly 6. The transfer assembly 3 includes a bracket 31, a first electric push rod 32 fixedly connected to the surface of the bracket 31, a lifting frame 33 fixedly connected to the output end of the first electric push rod 32, and a hook strap 34 fixedly connected to the surface of the lifting frame 33. The component to be processed 4 includes a cloth bag 41, which is engaged with the hook strap 34. A thick plastic sheet 42 is slidably connected to the inner wall of the cloth bag 41. The heating assembly 5 includes a second electric push rod 51, which is fixedly connected to the truss 2. An upper heat-conducting plate is fixedly connected to the output end of the second electric push rod 51, and an upper electric heating pipe 53 passes through the upper heat-conducting plate. A lower heat-conducting plate is fixedly connected to the surface of the operating table 1, and a lower electric heating pipe 55 passes through the lower heat-conducting plate. The molding assembly 6 includes a hydraulic press 61, which is fixedly connected to the truss 2. The output end is fixedly connected to an upper mold 62, and an upper cooling coil 63 is installed inside the upper mold 62. The surface of the operating table 1 is fixedly connected to a lower mold 64, and a lower cooling coil 65 is installed inside the lower mold 64. The upper heating plate 52 and the lower heating plate 54 are both made of aluminum alloy. The material of the thick plastic sheet 42 includes, but is not limited to, polycarbonate, acrylonitrile-butadiene-styrene copolymer and polymethyl methacrylate. It also includes: a transfer structure 7 set on the surface of the bracket 31 for automatically transferring the thick plastic sheet 42. The transfer structure 7 includes a fixed plate 701 fixedly installed on the surface of the bracket 31, a gear 703 and a rack frame 704 for driving the bracket 31 to move, and a guide rod 705 for limiting the movement path of the bracket 31; and a cleaning structure 8 set on the surface of the fixed plate 701 for cleaning foreign objects on the surface of the rack frame 704. The cleaning structure 8 includes a mounting plate 81 fixedly installed on the surface of the fixed plate 701 and a scraper 85 for scraping foreign objects.

[0056] The following section will explain the specific settings and functions of its transfer structure 7 and cleaning structure 8.

[0057] like Figures 5-10As shown, a servo motor 702 is fixedly connected to the surface of the fixed plate 701. The output end of the servo motor 702 is fixedly connected to the gear 703. The operating table 1 is fixedly connected to the rack frame 704. The gear 703 meshes with the rack frame 704. Both ends of the guide rod 705 are fixedly connected to the operating table 1. The guide rod 705 passes through the bracket 31. A limit plate 706 is fixedly connected to the surface of the fixed plate 701. Rollers 718 are rotatably connected to both ends of the limit plate 706. A bent plate 707 is fixedly connected to the surface of the operating table 1. A slide rod 708 slides through the bent plate 707. A strip plate 709 is fixedly connected to one end of the slide rod 708. A fixing block 710 is fixedly connected to the surface of the strip plate 709. A round rod 71 slides through the strip plate 709. 1. A movable block 712 is fixedly connected to one end of the round rod 711. The movable block 712 is slidably connected to the strip plate 709. Both the fixed block 710 and the movable block 712 have inclined surfaces. An iron sheet 713 is fixedly connected to the surface of the strip plate 709. An electromagnet 714 is fixedly connected to the surface of the bent plate 707. A first spring 715 is fixedly connected to the surface of the strip plate 709. The other end of the first spring 715 is fixedly connected to the bent plate 707. When the servo motor 702 is turned on, the output end of the servo motor 702 rotates, which drives the gear 703 to rotate. At this time, the gear 703 moves along the surface of the rack frame 704. The servo motor 702 drives the fixed plate 701 to move. The fixed plate 701 drives the bracket 31 to slide along the arc surface of the guide rod 705. This allows the thick plastic sheet 42 to move quickly. During this process, the fixing plate 701 moves the limiting plate 706, which in turn moves the roller 718. When the roller 718 contacts the inclined surface of the fixing block 710, it presses against the fixing block 710, causing it to move away from the rack frame 704. This movement of the fixing block 710 moves the strip plate 709, which in turn moves the slide rod 708 along the bent plate 707. The slide rod 708 then restricts the movement of the strip plate 709. The movement of the strip plate 709 compresses the first spring 715, which is then in a compressed state. Afterward, the limiting plate 706 disengages from the inclined surface of the fixing block 710. 710 will press against the surface of the limiting plate 706, and then the limiting plate 706 will contact the moving block 712. The moving block 712 will slide along the surface of the strip plate 709 due to compression. When the moving block 712 contacts the strip plate 709, the strip plate 709 will prevent the moving block 712 from moving further. At this time, the limiting plate 706 and the roller 718 will disengage from the fixed block 710, and the first spring 715 will begin to extend. The sides of the moving block 712 and the fixed block 710 that are close to each other will contact the two rollers 718 respectively. The rollers 718 can reduce the friction between the limiting plate 706 and the fixed block 710 and the moving block 712. At this time, the moving block 712 and the fixed block 710 will cooperate to restrict the position of the limiting plate 706, thereby restricting the position of the bracket 31.This allows the thick plastic sheet 42 to move precisely above the lower heating plate 54, improving processing accuracy. After heating, the electromagnet 714 is activated, attracting the iron plate 713, which in turn moves the strip plate 709. This removes the restriction on the position of the limiting plate 706 by the fixed block 710 and the moving block 712. Then, the servo motor 702 can be controlled to continue moving the bracket 31, thus quickly transferring the thick plastic sheet 42 to the molding assembly 6. A second spring 716 is fitted onto the arc surface of the round rod 711. The two ends of the second spring 716 are fixedly connected to the round rod 711 and the strip plate 709, respectively. The movement of the moving block 712 stretches the second spring 716, which, through its own elasticity, slows down the movement of the moving block 712, thereby slowing down the sliding speed of the limiting plate 706. This facilitates subsequent positioning of the limiting plate 706. A stop block 717 is fixedly connected to the surface of the strip plate 709. The distance between the stop block 717 and the fixed block 710 is less than the length of the limiting plate 706. Because the distance between the moving block 712 and the fixed block 710 is less than the length of the limiting plate 706, the limiting plate 706 is not restricted by the moving block 712 and the fixed block 710, thus facilitating the movement and repositioning of the bracket 31.

[0058] like Figure 8 and Figure 11 As shown, a rotating block 82 is rotatably connected inside the mounting plate 81. A connecting rod 83 is fixedly connected to one end of the rotating block 82. A sleeve 84 is slidably connected to the surface of the connecting rod 83. The sleeve 84 is fixedly connected to the scraper 85. A bolt 86 is threaded into the connecting rod 83. During the movement of the bracket 31, the fixed plate 701 will drive the mounting plate 81 to move. The movement of the mounting plate 81 will drive the rotating block 82 to move. The movement of the rotating block 82 will drive the connecting rod 83 to move. The movement of the connecting rod 83 will drive the sleeve 84 to move. The movement of the sleeve 84 will drive the scraper 85 to slide along the tooth surface of the rack frame 704. The scraper removes foreign objects attached to the toothed surface of the rack frame 704. The arc surface of the rotating block 82 is fitted with a torsion spring 87. The two ends of the torsion spring 87 are fixedly connected to the support plate and the rotating block 82, respectively. The torsion spring 87 will drive the rotating block 82 to rotate by its own torque. The rotating block 82 will drive the connecting rod 83 to rotate. The sleeve 84 will rotate with the connecting rod 83, causing the scraper 85 to press against the toothed surface of the rack frame 704. The vertical cross section of the scraper 85 is arc-shaped. The scraper 85 is made of elastic material. The scraper 85 with its arc-shaped vertical cross section will move the foreign objects. Due to the obstruction of the scraper 85, the foreign objects will fall to both sides of the rack frame 704.

[0059] like Figures 1-11 As shown, a method of using a plastic sheet hot pressing molding device includes the following steps:

[0060] S1. Place the thick plastic sheet 42 that needs to be thermoformed into a pre-sewn cloth bag 41 to complete a component 4 to be processed.

[0061] S2. Use the hook strap 34 to limit the cloth bag 41, and use the first electric push rod 32 to raise the lifting frame 33 so that the component to be processed 4 is higher than the lower heating plate 54.

[0062] S3. Start the servo motor 702. With the help of the gear 703 and the rack frame 704, the component to be processed 4 is transferred to the middle of the upper heating plate 52 and the lower heating plate 54 that have been preheated and set to a fixed temperature. The fixed block 710, the moving block 712 and the limiting plate 706 work together to precisely limit the position of the bracket 31. The scraper 85 will scrape off the foreign objects attached to the tooth surface of the rack frame 704 in time. With the help of the first electric push rod 32, the lifting frame 33 is moved down so that the cloth bag 41 contacts the lower heating plate 54. The second electric push rod 51 is controlled to press down the upper heating plate 52 and make it contact the cloth bag 41.

[0063] S4. According to the material characteristics of the thick plastic sheet 42, turn on the upper heating tube 53 and the lower heating tube 55, and heat the thick plastic sheet 42 to a suitable temperature with the help of the upper heating plate 52 and the lower heating plate 54.

[0064] S5. After heating is complete, lift the lifting frame 33 again so that the component to be processed 4 is higher than the lower mold 64. Then move the component to be processed 4 above the lower mold 64. Then lower the lifting frame 33 so that the cloth bag 41 contacts the lower mold 64.

[0065] S6. Using the hydraulic press 61, the upper mold 62 is pressed down to close the mold. At the same time, coolant is introduced into the upper cooling coil 63 and the lower cooling coil 65 to cool the upper mold 62 and the lower mold 64, thereby reducing the temperature of the thick plastic sheet 42 to the shaping temperature.

[0066] S7. Open the mold of the molding component 6, and then use the first electric push rod 32 to move the component 4 to be processed out of the lower mold 64.

[0067] S8. Control the output of the servo motor 702 to rotate in the opposite direction, and move the bracket 31 to a suitable position;

[0068] S9. Remove the cloth bag 41, and then take out the thick plastic sheet 42 from the cloth bag 41 to complete the hot pressing molding operation.

[0069] like Figures 1-11 As shown, the cloth bag 41 is made of two pieces of high-temperature resistant fleece that are stacked and aligned, and three positioning edges are processed by sewing according to the size of the thick plastic sheet 42. The upper heating tube 53 and the lower heating tube 55 are controlled by intelligent temperature controllers. The models of intelligent temperature controllers include, but are not limited to, XMTA-2201. The upper mold 62 and the lower mold 64 are controlled by mold temperature controllers. The models of mold temperature controllers include, but are not limited to, STM-900W.

[0070] likeFigures 1-11 As shown, step S3 specifically involves:

[0071] The heating temperature for thick plastic sheet 42, made of polycarbonate, is 157–163°C.

[0072] The heating temperature for the thick plastic sheet 42, made of acrylonitrile-butadiene-styrene copolymer, is 135-140℃.

[0073] When the material of the thick plastic sheet 42 is polymethyl methacrylate, the heating temperature is 105-110℃.

[0074] The heating conditions for thick plastic sheet 42 must be adjusted according to the specific molding shape and sheet thickness requirements of the molding component 6, and the temperature and heating time must be controlled.

[0075] The overall working principle is as follows: When the thick plastic sheet 42 needs to be processed, the thick plastic sheet 42 is placed into the cloth bag 41, and then the cloth bag 41 is hooked and fixed using the hook strap 34. Then, the output end of the first electric push rod 32 is extended, which drives the lifting frame 33 to move upward. The movement of the lifting frame 33 drives the hook strap 34 to move, which in turn drives the cloth bag 41 to move upward. When the cloth bag 41 is higher than the lower heating plate 54, the servo motor 702 is activated. The rotation of the output end of the servo motor 702 drives the gear 703 to rotate. At this time, the gear 703 moves along the surface of the rack frame 704. The servo motor 702 drives the fixing plate 701 to move, and the fixing plate 701 drives the bracket 31 to move along the guide. The rod 705 slides along its arc surface, rapidly moving the position of the thick plastic sheet 42. During this process, the fixed plate 701 moves the limiting plate 706, which in turn moves the roller 718. When the roller 718 contacts the inclined surface of the fixed block 710, it presses against the fixed block 710, causing it to move away from the rack frame 704. This movement of the fixed block 710 moves the strip plate 709, which in turn moves the sliding rod 708 along the bent plate 707. The sliding rod 708 then restricts the movement of the strip plate 709. The movement of the strip plate 709 compresses the first spring 715, which is now in a compressed state. Afterward, the limiting plate 706 will contact the fixed block... When the inclined surface of 710 disengages, the fixed block 710 abuts against the surface of the limiting plate 706, and then the limiting plate 706 contacts the movable block 712. The movable block 712 slides along the surface of the strip plate 709 due to compression. The round rod 711, following the movement of the movable block 712, stretches the second spring 716. The second spring 716, with its own elasticity, slows down the movement speed of the movable block 712, thereby slowing down the sliding speed of the limiting plate 706, facilitating subsequent restriction of the position of the limiting plate 706. When the side of the movable block 712 closest to the second spring 716 contacts the strip plate 709, the strip plate 709 will hinder the movable block 712 from continuing to move. At this time, both the limiting plate 706 and the roller 718 will disengage from the fixed block 710, and the first spring 71... 5. As the extension begins, the sides of the moving block 712 and the fixed block 710 that are close to each other will contact the two rollers 718 respectively. The rollers 718 can reduce the friction between the limiting plate 706 and the fixed block 710 and the moving block 712. At this time, the moving block 712 and the fixed block 710 cooperate to restrict the position of the limiting plate 706, thereby restricting the position of the bracket 31, so that the thick plastic sheet 42 can move accurately above the lower heating plate 54, improving the processing accuracy. Then, the output end of the first electric push rod 32 is controlled to retract, so that the cloth bag 41 contacts the lower heating plate 54. Then, the output end of the second electric push rod 51 is controlled to extend, and the upper heating plate 52 will move downward. At the same time, the upper electric heating tube 53 and the lower electric heating tube 55 are controlled to heat the upper heating plate 52 and the lower heating plate 54.After the upper heating plate 52 contacts the cloth bag 41, it works with the lower heating plate 54 to heat the cloth bag 41 and the thick plastic sheet 42. After heating, the output end of the second electric push rod 51 is retracted, and the output end of the first electric push rod 32 is extended, so that the cloth bag 41 is higher than the lower mold 64. Then the electromagnet 714 is turned on, which attracts the iron plate 713. The iron plate 713 drives the strip plate 709 to move, so that the fixed block 710 and the moving block 712 no longer restrict the position of the limiting plate 706. Then the servo motor 702 can be controlled to continue to drive the bracket 31 to move, thereby quickly transferring the thick plastic sheet 42 to the molding assembly 6. During this process, the cloth bag 41 can keep the thick plastic sheet 42 warm, and using the cloth bag 41 can also avoid leaving cutting edges around the thick plastic sheet 42, thereby improving the utilization rate of the thick plastic sheet 42. Then, the electromagnet 714 is turned off, and the strip plate 709 will reset again with the help of the elastic force of the first spring 715. Then, the roller 718 will contact the inclined surface of another fixed block 710. Similarly, the fixed block 710 and the moving block 712 will restrict the position of the limiting plate 706 again, so that the thick plastic sheet 42 is accurately positioned between the lower mold 64 and the upper mold 62. Then, the output end of the first electric push rod 32 is controlled to retract, so that the cloth bag 41 contacts the lower mold 64. Then, the output end of the hydraulic press 61 is extended to move the upper mold 62 downward. After the upper mold 62 contacts the cloth bag 41, the mold is closed. The temperature of the upper mold 62 and the lower mold 64 is controlled by the mold temperature controller. The upper cooling coil 63 and the lower cooling coil 65 can be easily circulated with coolant for cooling. After cooling, the output end of the hydraulic press 61 is contracted to raise the upper mold 62. Then, the output end of the first electric push rod 32 is extended to raise the cloth bag 41. After that, the electromagnet 714 is activated to release the restriction on the limit plate 706. Then, the output end of the servo motor 702 is controlled to rotate in the opposite direction. To return bracket 31 to its original position, during this process, the limiting plate 706 will cause the roller 718 to move. The roller 718 will then contact the inclined surface of the moving block 712. At this time, the stop block 717 will restrict the position of the moving block 712, preventing it from moving. Therefore, the roller 718 will press against the moving block 712, and the moving block 712 will press against the strip plate 709. When the moving block 712 abuts against the surface of the limiting plate 706, since the distance between the moving block 712 and the fixed block 710 is less than the length of the limiting plate 706, the limiting plate 706 will not be restricted by the moving block 712 and the fixed block 710, thus facilitating the movement and repositioning of bracket 31.

[0076] During the movement of bracket 31, fixing plate 701 drives mounting plate 81 to move, mounting plate 81 moves rotating block 82, rotating block 82 moves connecting rod 83, connecting rod 83 moves sleeve 84, and sleeve 84 moves scraper 85 to slide along the tooth surface of rack frame 704. During this process, torsion spring 87 uses its own torque to drive rotating block 82 to rotate, rotating block 82 drives connecting rod 83 to rotate, and sleeve 84, following the rotation of connecting rod 83, causes scraper 85 to press against the tooth surface of rack frame 704. As bracket 31 moves, scraper 85 scrapes away foreign matter adhering to the tooth surface of rack frame 704. Afterwards, the vertically curved scraper 85 will also move the foreign object. Due to the obstruction of the scraper 85, the foreign object will fall to both sides of the rack frame 704, thereby preventing the foreign object from adhering to the tooth surface of the rack frame 704 and affecting the normal meshing of the gear 703 and the rack frame 704, thus improving the stability of the gear 703 during operation. When the scraper 85 needs to be replaced, rotate the bolt 86 to disengage the bolt 86 from the connecting rod 83, then remove the sleeve 84, and then put the sleeve 84 with the new scraper 85 on the connecting rod 83. Then, use the bolt 86 to restrict the position of the sleeve 84 to complete the replacement of the scraper 85.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A plastic sheet hot pressing molding device, characterized in that: The assembly includes an operating table (1), a truss (2), a transfer assembly (3), a component to be processed (4), a heating assembly (5), and a molding assembly (6). The transfer assembly (3) includes a bracket (31), on which a first electric actuator (32) is fixedly connected. The output end of the first electric actuator (32) is fixedly connected to a lifting frame (33), and the surface of the lifting frame (33) is fixedly connected to a hook strap (34). The component to be processed (4) includes a cloth bag (41), which is engaged with the hook strap (34). A thick plastic sheet (42) is slidably connected to the inner wall of the cloth bag (41). The heating assembly (5) includes a second electric actuator (51), which is fixedly connected to the truss (2). The output end of the second electric actuator (51) is fixedly connected to... The upper heat-conducting plate is connected to the operating table (1), and the lower heat-conducting plate is fixedly connected to the surface of the operating table (1), and the lower heat-conducting plate is fixedly connected to the surface of the operating table (1), and the lower heat-conducting plate is fixedly connected to the surface of the operating table (1), and the molding assembly (6) includes a hydraulic press (61), which is fixedly connected to the truss (2). The output end of the hydraulic press (61) is fixedly connected to an upper mold (62), and the upper mold (62) is fixedly connected to an upper cooling coil (63). The surface of the operating table (1) is fixedly connected to a lower mold (64), and the lower mold (64) is fixedly connected to a lower cooling coil (65). The upper heat-conducting plate and the lower heat-conducting plate are both made of aluminum alloy. The material of the thick plastic sheet (42) includes any one of polycarbonate, acrylonitrile-butadiene-styrene copolymer and polymethyl methacrylate, and also includes: A transfer structure (7) is provided on the surface of the bracket (31) for automatically transferring thick plastic sheet (42). The transfer structure (7) includes a fixing plate (701) fixedly installed on the surface of the bracket (31), a gear (703) and a rack frame (704) for driving the bracket (31) to move, and a guide rod (705) for limiting the movement path of the bracket (31). A cleaning structure (8) is provided on the surface of the fixing plate (701) for cleaning foreign objects on the surface of the rack frame (704). The cleaning structure (8) includes a mounting plate (81) fixedly installed on the surface of the fixing plate (701) and a scraper (85) for scraping foreign objects. A servo motor (702) is fixedly connected to the surface of the fixed plate (701). The output end of the servo motor (702) is fixedly connected to a gear (703). The operating table (1) is fixedly connected to a rack frame (704). The gear (703) meshes with the rack frame (704). Both ends of the guide rod (705) are fixedly connected to the operating table (1). The guide rod (705) passes through the bracket (31). A limit plate (706) is fixedly connected to the surface of the fixed plate (701). Both ends of the limit plate (706) are rotatably connected to rollers (718). A bending plate (707) is fixedly connected to the surface of the operating table (1). A sliding rod (708) slides through the bending plate (707). A strip plate (709) is fixedly connected to one end of the plate (709), a fixing block (710) is fixedly connected to the surface of the strip plate (709), a round rod (711) slides through the strip plate (709), a moving block (712) is fixedly connected to one end of the round rod (711), the moving block (712) is slidably connected to the strip plate (709), the surfaces of the fixing block (710) and the moving block (712) are both provided with inclined surfaces, an iron sheet (713) is fixedly connected to the surface of the strip plate (709), an electromagnet (714) is fixedly connected to the surface of the bent plate (707), a first spring (715) is fixedly connected to the surface of the strip plate (709), and the other end of the first spring (715) is fixedly connected to the bent plate (707). The arc surface of the round rod (711) is fitted with a second spring (716), and the two ends of the second spring (716) are fixedly connected to the round rod (711) and the strip plate (709) respectively.

2. The plastic sheet hot pressing molding apparatus according to claim 1, characterized in that: A stop (717) is fixedly connected to the surface of the strip plate (709), and the distance between the stop (717) and the fixed block (710) is less than the length of the limiting plate (706).

3. The plastic sheet hot pressing molding apparatus according to claim 1, characterized in that: A rotating block (82) is rotatably connected inside the mounting plate (81). A connecting rod (83) is fixedly connected to one end of the rotating block (82). A sleeve (84) is slidably connected to the surface of the connecting rod (83). The sleeve (84) is fixedly connected to the scraper (85). A bolt (86) is threaded inside the connecting rod (83).

4. The plastic sheet hot pressing molding apparatus according to claim 3, characterized in that: The arc surface of the rotating block (82) is fitted with a torsion spring (87), and the two ends of the torsion spring (87) are fixedly connected to the support plate and the rotating block (82) respectively.

5. The plastic sheet hot pressing molding apparatus according to claim 3, characterized in that: The vertical cross-section of the scraper (85) is arc-shaped, and the scraper (85) is made of elastic material.

6. A method of using the plastic sheet hot pressing molding apparatus according to any one of claims 1-5, characterized in that: Includes the following steps: S1. Place the thick plastic sheet (42) that needs to be thermoformed into a pre-sewn cloth bag (41) to complete a component to be processed (4). S2. Use the hook strap (34) to limit the cloth bag (41), and use the first electric push rod (32) to raise the lifting frame (33) so that the component to be processed (4) is higher than the lower heating plate (54). S3. Turn on the servo motor (702). With the help of the gear (703) and rack frame (704), the component to be processed (4) is transferred to the middle of the upper heating plate (52) and lower heating plate (54) that have been preheated and set to a fixed temperature. The fixed block (710), moving block (712) and limiting plate (706) work together to precisely limit the position of the bracket (31). The scraper (85) will scrape off the foreign matter attached to the tooth surface of the rack frame (704) in time. With the help of the first electric push rod (32), the lifting frame (33) is moved down so that the cloth bag (41) contacts the lower heating plate (54). The second electric push rod (51) is controlled to press down the upper heating plate (52) and contact the cloth bag (41). S4. According to the material characteristics of the thick plastic sheet (42), turn on the upper heating tube (53) and the lower heating tube (55), and heat the thick plastic sheet (42) to a suitable temperature with the help of the upper heating plate (52) and the lower heating plate (54); S5. After heating is complete, lift the lifting frame (33) again so that the component to be processed (4) is higher than the lower mold (64). Then move the component to be processed (4) above the lower mold (64). Then move the lifting frame (33) down so that the cloth bag (41) contacts the lower mold (64). S6. Using a hydraulic press (61), the upper mold (62) is pressed down to close the mold. At the same time, coolant is introduced into the upper cooling coil (63) and the lower cooling coil (65) to cool the upper mold (62) and the lower mold (64), thereby reducing the temperature of the thick plastic sheet (42) to the setting temperature. S7. Open the mold of the molding component (6), and then use the first electric push rod (32) to move the component to be processed (4) out of the lower mold (64). S8. Control the output end of the servo motor (702) to rotate in the opposite direction and move the bracket (31) to a suitable position; S9. Remove the cloth bag (41) and take out the thick plastic sheet (42) from the cloth bag (41) to complete the hot pressing molding operation.

7. The method of using the hot pressing molding device for plastic sheets according to claim 6, characterized in that: The bag (41) is made of two pieces of high-temperature resistant fleece that are stacked and aligned, and three positioning edges are processed by sewing according to the size of the thick plastic sheet (42). The upper heating tube (53) and the lower heating tube (55) are controlled by an intelligent temperature controller. The upper mold (62) and the lower mold (64) are controlled by a mold temperature controller.

8. The method of using the plastic sheet hot pressing molding device according to claim 7, characterized in that: Step S3 specifically involves: The heating temperature of the thick plastic sheet (42) when it is made of polycarbonate is 157-163°C. The heating temperature of the thick plastic sheet (42) when the material is acrylonitrile-butadiene-styrene copolymer is 135-140°C; The heating temperature of the thick plastic sheet (42) when it is made of polymethyl methacrylate is 105-110°C. The heating conditions of the thick plastic sheet (42) must be adjusted according to the specific molding shape and sheet thickness requirements of the molding component (6), and the temperature and heating time must be controlled.

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