Vacuum heat sealing device for vacuum thermal insulation panel and heat sealing process thereof

Abstract

A kind of vacuum heat sealing device of vacuum insulation board and its heat sealing process, it is related to vacuum insulation board heat sealing technical field, including heat sealing station, press system, lifting open and close sealing door, packaging tray, cavity is equipped in heat sealing station inside, the opening of cavity is equipped with lifting open and close sealing door sliding opening feeding on one side, by setting pull type packaging tray, the positioning of face shell and bottom shell is realized in the outside of heat sealing station Feeding, using lifting mechanism, greatly facilitate the convenient performance of the operation of pull type of packaging tray, when vacuum insulation board heat sealing, by multiple rotatable adjustment and towards edge seal strip heating heater heating, the edge seal strip of bottom shell is heated exhaust, after cavity is pumped, the upper pressing plate of press system is lowered and is pressed tightly the supporting rod of packaging tray, supporting rod elastically moves and is pressed to the edge seal strip on bottom shell Face shell is vacuum-pressed, the present application effectively solves the problem of inconvenient feeding and low feeding efficiency in the process of manual feeding of existing vacuum heat sealing device.

Description

Technical Field

[0001] This invention relates to the field of vacuum insulation panel heat sealing technology, and particularly to a vacuum heat sealing device and heat sealing process for a vacuum insulation panel. Background Technology

[0002] Vacuum insulation panels (VIP panels) are mainly composed of core materials, barrier bags, and getters. The barrier bags include a coated bottom shell and a top shell. The core material and getter fill the interior of the coated bottom shell. Under vacuum conditions, the top shell is glued to the four sides of the bottom shell to form an internal vacuum seal, thus obtaining a vacuum insulation product. Vacuum insulation panels (VIP panels) achieve their insulation effect by utilizing the high vacuum effect inside and the high thermal insulation performance of the core material. Therefore, during the sealing process of the bottom shell and four sides of the vacuum insulation panel, the bottom shell and the top shell need to be placed in a heat sealing platform. After the heat sealing platform is evacuated to a certain degree, the top shell is pressed and heat-sealed onto the bottom shell under vacuum to complete the sealing of the vacuum insulation panel. After sealing, the vacuum is broken and the product is removed. Therefore, the existing operation of sealing the vacuum insulation panel is cumbersome. After each product is produced, the top shell and bottom shell need to be manually loaded. Especially in order to reduce the waiting time and energy consumption of vacuuming, the heat sealing platform is kept as small as possible, which makes the operating space of the vacuum heat sealing device small. This poses a huge challenge to the workers in placing the top shell and bottom shell. Therefore, the existing vacuum heat sealing device is difficult to load the top shell and bottom shell, and the efficiency is difficult to improve.

[0003] To address this, patent application CN202311782908.8 discloses a vacuum four-side sealing device and its usage method for processing vacuum insulation panels, aiming to improve the production speed and efficiency of vacuum insulation panels. The device includes: a feeding device, a loading device, and a heat sealing device; the loading device includes: an upper shell with an open bottom, one side of which is connected to a vacuum pump; a pressure plate that can be lifted and lowered inside the upper shell, with several suction cups embedded in the pressure plate, the tops of which are connected to a vacuum pump; several clamping components located on both sides of the top of the pressure plate; the feeding device is used to transport the barrier film to the bottom of the pressure plate; the heat sealing device includes a lower shell with an open top, a tray located at the top of the lower shell, and heat sealing components that can be lifted and lowered inside the lower shell and surround the tray, with a bottom shell for holding the core material embedded on the tray. The above-mentioned structure, through improvements in material preparation speed, core material filling efficiency, and core material vacuum processing efficiency, greatly increases the production speed and efficiency of vacuum insulation panels. However, the aforementioned vacuum four-side sealing equipment is only designed for heat sealing between plastic materials. Since the heat sealing effect between plastic materials depends on the planar fit between them, good planarity between the upper mold and the bottom shell is required during the positioning process. Therefore, in actual use, poor planarity can easily lead to defects such as false sealing, penetration, and air leakage. It is not applicable to bottom shell products with glue on the side sealing strip. Moreover, the aforementioned vacuum four-side sealing equipment is prone to defects similar to paper jams in the film preparation process, which can easily cause the film to jam and render the equipment unusable. The bottom shell loading process requires manual operation within the confined heat sealing table, resulting in low loading efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum heat sealing device for vacuum insulation panels, which aims to solve the heat sealing problem of products with glued bottom shells and the problems of inconvenient and inefficient feeding of bottom shells and top shells during manual feeding.

[0005] In response to this, the present invention adopts the following technical solution: a vacuum heat sealing device for a vacuum insulation panel, comprising: a heat sealing table, a press system, a lifting and opening sealing door, and a sealing tray;

[0006] The heat sealing station has a chamber inside, with an opening on one side of the chamber. A sliding plate is provided on the outside of the opening. A vacuum pumping pipe for external connection and vacuuming is provided on the side wall of the chamber opposite to the opening. A support is provided at the bottom of the chamber.

[0007] The press system includes a cover plate that is sealed to the upper part of the heat sealing platform. A plurality of bevel gear screw jacks are provided on one side of the cover plate. The plurality of bevel gear screw jacks lift synchronously. The lifting rods of the plurality of bevel gear screw jacks are connected to an upper pressure plate through the cover plate. An upper heat exchange tube is provided inside the bottom surface of the upper pressure plate. A heat conduction plate is provided on the bottom surface of the upper pressure plate.

[0008] The lifting and closing sealing door is located on one side of the opening of the chamber and slides on the sliding plate for sliding opening and feeding.

[0009] The packaging tray is movably disposed within the cavity. The packaging tray includes a tray plate with a support plate at its bottom. A support wheel is rotatably mounted on the bottom of the support plate. A rectangular frame with a side-sealing heating and cooling structure is provided on the upper surface of the tray plate. A groove is formed between the side-sealing heating and cooling structure and the tray plate. The bottom shell containing the core material is positioned in the groove by the side seal strip. An elastically movable support rod is provided on the outside of the side-sealing heating and cooling structure. The support rod is located above the side-sealing heating and cooling structure. The top shell is supported on the support rod, so that the bottom shell and the top shell are positioned vertically relative to each other. Multiple sets of rotatable and adjustable heaters are provided around the support rod, which heat the side seal strip of the bottom shell to exhaust the air. After the cavity is evacuated, the upper pressure plate descends and presses the support rod. The support rod moves elastically and presses the top shell onto the side seal strip of the bottom shell for vacuum sealing.

[0010] The packaging tray includes a lifting mechanism for sliding out or positioning within the chamber. The lifting mechanism includes a pair of lifting seats and a pair of lifting cylinders. The lifting seats are movably disposed on both sides of the packaging tray. Each lifting seat has two rows of upper pulleys and a lower pulley assembly arranged opposite each other. A lifting block is located at the bottom of each lifting seat, and the bottom of the lifting block has an inclined surface. The lifting cylinders are disposed on both sides outside the heat sealing platform. The extension rods of the lifting cylinders extend through the sidewall of the heat sealing platform to one side of the lifting block. The end of the retractable rod is equipped with a lifting wheel. During heat sealing and pressing, the support wheel abuts against the bottom of the heat sealing platform for support, and the tray slides against the lower part of the upper pulley group. When the material is pulled out for loading, the lifting cylinder extends the lifting wheel toward the lifting block, so that the lifting wheel abuts against the inclined surface. The lifting wheel lifts the lifting seat along the inclined surface. After the lifting seat is lifted, the tray slides against the upper part of the lower pulley group. The support wheel disengages from the bottom of the heat sealing platform, and the packaging tray slides out of the outside of the heat sealing platform by sliding the lower pulley group to realize the loading of the top shell and bottom shell.

[0011] Furthermore, the heater includes a heating plate, a connecting frame, and a steering plate. The heating plate is connected to the steering plate, and the connecting frame has an arc-shaped groove. The steering plate and the connecting frame are rotatably mounted through the arc-shaped groove. The heater's adjustable mounting via rotation allows for convenient adjustment of the heating effect on the adhesive of the edge seal strip. This preheating process allows for the evaporation of volatile small molecules in the adhesive, preventing the adhesive from evaporating and overflowing into the product under vacuum conditions, thus affecting the product's vacuum level.

[0012] Furthermore, the heater located in the width direction of the support rod is provided with an adjusting mechanism. The adjusting mechanism includes two pairs of lead screws, each pair of lead screws being connected by a coupling to rotate synchronously as a whole. Each pair of lead screws is mounted on both sides of the chamber and parallel to the length direction of the support rod. The two lead screws in each pair have opposite thread directions. The ends of the lead screws are rotatably connected by seated spherical bearings. One of the lead screws is also connected to a power mechanism for its rotation. An aluminum profile rod for mounting the heater is provided between the pairs of lead screws on both sides. The aluminum profile rod is movably connected to the lead screw through a lead screw nut. By rotating the power mechanism, the lead screw drives the heaters on the aluminum profile rods on both sides to move synchronously closer or further away in the length direction of the support rod, thereby achieving the purpose of adjusting the distance of the heater to the edge seal in the width direction of the support rod.

[0013] Furthermore, the power mechanism includes a second servo motor, which is connected to the lead screw drive via a steering gear, a linkage shaft, and a coupling.

[0014] Furthermore, the lifting and opening sealing door includes a door body, with multiple sliding seats on both sides of the door body. The sliding seats are slidably connected to the heat-sealing platform. Each sliding seat includes a movable plate, with a pair of connecting seats at both ends of the movable plate fixedly connected to the door body. A sliding space is formed between the connecting seats and the movable plate, allowing the sliding plate to slide. A first movable wheel is mounted on the movable plate, slidably abutting against the sliding plate. A second movable wheel is mounted on the movable plate. A cylinder seat is provided on the back of each connecting seat, and a sealing element is provided on the cylinder seat. The sealing cylinder has a telescopic rod end that extends through the cylinder seat into the sliding space. The telescopic rod end of the sealing cylinder is rotatably connected to a pressure wheel via a pressure shaft, and the pressure wheel is positioned opposite to the second moving wheel. The door body is equipped with a hydraulic cylinder for sliding and lifting to open. The hydraulic cylinder is rotatably mounted on the bracket, and the telescopic rod end of the hydraulic cylinder is rotatably connected to the moving plate. The hydraulic cylinder closes the door by pressing the second moving wheel against the sliding plate and sliding along the direction of the sliding plate. The sealing cylinder seals the door body by pressing it against and pressing it against the opening of the chamber through the pressure wheel.

[0015] Furthermore, the opening of the chamber is provided with a sealing ring, thereby making the chamber and the door more airtight after the door is pressed together.

[0016] Furthermore, the surface of the door is provided with several viewing windows for observing the interior.

[0017] Furthermore, the connecting seat is also provided with a pressing groove, and the pressing shaft extends laterally into the pressing groove. During the process of the sealing cylinder pressing the door body through the pressing wheel, the pressing shaft is positioned and smoothly slides to press through the pressing groove.

[0018] Furthermore, the heat sealing platform is equipped with a linear bearing, and the bottom of the lifting seat is equipped with a sliding rod corresponding to the linear bearing. The sliding rod is sleeved inside the linear bearing, so that a sliding connection is formed between the sliding rod and the linear bearing.

[0019] Furthermore, the edge sealing hot and cold structure includes an edge sealing base and a lower heat exchange tube. The lower heat exchange tube is disposed inside the edge sealing base. A copper pressure plate is fitted onto the outside of the edge sealing base. A silicone rubber pad is provided between the copper pressure plate and the edge sealing base. The silicone rubber pad rests against the upper surface of the edge sealing base.

[0020] Furthermore, the support rod has multiple spring posts fixed at its bottom, and springs are fitted around the outside of the spring posts. One end of the spring is supported at the bottom of the support rod, and the other end of the spring is fitted and positioned on the support plate. The support plate is provided with clearance grooves corresponding to the up and down movement of the spring posts. With the help of the springs, the support rod can move elastically above the side sealing heating and cooling structure.

[0021] Furthermore, the support rod has several fixing clips installed on its surface for clamping the edge of the faceplate. Each fixing clip includes a clamping seat fixed to the surface of the support rod. One end of the clamping seat is hinged to a clamping rod. A clamping spring is provided at the hinge point between the clamping rod and the clamping seat. The clamping spring causes the clamping rod to press down and elastically press against the surface of the clamping seat. A rubber sleeve is fitted on the clamping rod. The faceplate placed on the support rod is positioned and fixed by the fixing clips on the support rod, which facilitates the positioning of the faceplate and the heat sealing of the bottom shell. After heat sealing, the fixing clips can also clamp the vacuum insulation panel product and lift it away from the edge sealing hot and cold structure, thereby facilitating the removal of the vacuum insulation panel.

[0022] This invention provides a heat-sealing process for a vacuum insulation panel, comprising the following steps:

[0023] S1, open the lifting and closing sealing door, start the lifting mechanism, lift the packaging tray and pull it out from the heat sealing table to the outside of the lifting and closing sealing door, position the bottom shell on the surface of the copper pressure plate of the side sealing hot and cold structure of the packaging tray and position it, then position the top shell on the surface of the support rod and use the fixing clamp to press and fix it. After loading, push the packaging tray into the heat sealing table and close the lifting and closing sealing door.

[0024] S2, activate the external vacuum pump to evacuate the inside of the heat sealing stage. When the vacuum level inside the heat sealing stage reaches 8×10⁻⁶... -2 At a pressure of Pa, the heater is turned on to heat the adhesive on the edge seal of the bottom shell. The heater temperature is controlled between 40℃ and 100℃, and the heating is maintained for 10 to 30 seconds. The vacuum degree is 8×10⁻⁶. -2 After Pa stabilizes for 5-10 seconds, the exhaust process ends.

[0025] S3, the heat sealing stage continues to evacuate vacuum until the vacuum level reaches 8×10. -3 At Pa, mold temperature oil of 90℃~130℃ is introduced into the upper heat exchanger tube and the lower heat exchanger tube to maintain the surface temperature of the heat conduction plate and the copper pressure plate at 90℃~130℃. The press system is turned on, and the upper pressure plate heat seals the face shell onto the side seal of the bottom shell. The heat sealing time is controlled at 20~130s, and the pressure is held for 3~5s.

[0026] S4. After heat sealing, turn off the heater and stop vacuuming. While keeping the upper pressure plate pressed, simultaneously switch the upper heat exchanger tube and the lower heat exchanger tube to introduce mold temperature oil at 20℃~30℃, so that the edge seal strip can be cooled and shaped at a temperature of 20℃~30℃.

[0027] S5, after breaking the vacuum on the heat sealing platform, open the lifting and closing sealing door, start the press system, the upper pressure plate is lifted off the surface of the support rod, the support rod automatically lifts the heat-sealed vacuum insulation board above the side sealing hot and cold structure through the shell, start the lifting mechanism, lift the packaging tray and pull it out from the heat sealing platform to the outside of the lifting and closing sealing door, and take out the heat-sealed vacuum insulation board from the support rod.

[0028] This invention, by setting a pull-out packaging tray, enables the positioning and loading of the front and bottom shells outside the heat sealing station, avoiding the operation in the confined space of the heat sealing station in existing technologies, and greatly improving the production efficiency of vacuum insulation panels.

[0029] This invention, by setting up a lifting mechanism, greatly facilitates the convenient operation of the packaging tray by pulling it out, ensures that the packaging tray does not slide after being placed on the heat sealing table, and improves the stability of the packaging tray during the heat sealing process.

[0030] This invention also significantly improves the removal of small-molecule adhesive molecules from the vacuum insulation panel during the heat-sealing process by incorporating an adjustable heater. The invention, through the use of an upper heating element and a side-sealing heating / cooling structure, provides rapid heating and cooling effects by utilizing mold temperature oil. During heating, the mold temperature oil acts as a heating medium, resulting in more uniform temperature and a more consistent heat-sealing effect. Simultaneously, rapid cooling ensures the product cools and sets under pressure, and allows the adhesive to solidify and bond quickly after cooling, improving the appearance of the heat-sealed product. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the heat sealing device viewed from the front.

[0032] Figure 2 This is a three-dimensional structural diagram of the heat sealing device viewed from the rear.

[0033] Figure 3 This is a schematic diagram of the three-dimensional structure of the press system.

[0034] Figure 4 This is one of the schematic diagrams of the three-dimensional structure of the sliding seat.

[0035] Figure 5 This is the second schematic diagram of the three-dimensional structure of the sliding seat.

[0036] Figure 6 This is a schematic diagram of the internal structure of the heat sealing device.

[0037] Figure 7 for Figure 6 A magnified view of part A in the diagram.

[0038] Figure 8 for Figure 6 Left view.

[0039] Figure 9 for Figure 8 A magnified view of part B in the diagram.

[0040] Figure 10 This is a schematic diagram of the three-dimensional structure of the packaging tray.

[0041] Figure 11 This is a schematic diagram showing the decomposition of the hot and cold structure of the edge seal.

[0042] Figure 12 This is a schematic diagram of the three-dimensional structure of the fixed clamp.

[0043] Figure 13 This is a schematic diagram of the three-dimensional structure of the heater.

[0044] Figure 14This is a schematic diagram of the bottom and top shell structure of a vacuum insulation panel. Wherein: 1-Heat sealing platform, 11-Vacuum extraction pipe, 12-Bracket, 13-Sliding plate, 14-Sealing ring, 2-Pressure system, 21-Cover plate, 22-Bevel gear screw jack, 23-First servo motor, 24-Gear steering box, 25-Upper pressure plate, 26-Upper heat exchange pipe, 27-Heat conduction plate, 3-Lifting and opening sealing door, 31-Door body, 32-Viewing window, 33-Sliding seat, 331-Moving plate, 332-Connecting seat, 3 33-Sealing cylinder, 334-Cylinder seat, 335-Pressure groove, 336-Pressure shaft, 337-Pressure wheel, 338-First moving wheel, 339-Second moving wheel, 34-Hydraulic cylinder, 4-Encapsulation tray, 41-Pattern, 411-Spring sleeve, 412-Handle, 42-Support plate, 43-Support rod, 44-Support wheel, 45-Side seal hot and cold structure, 451-Copper pressure plate, 452-Silicone rubber pad, 453-Side seal base, 4 54-Lower heat exchanger tube, 46-Spring, 47-Spring post, 48-Fixing clamp, 481-Clamp seat, 482-Clamp rod, 4821-Bent protrusion, 483-Clamping spring, 484-Rubber sleeve, 5-Lifting mechanism, 51-Lifting seat, 52-Lifting cylinder, 53-Lifting block, 531-Inclined surface, 54-Lifting wheel, 55-Upper pulley assembly, 56-Lower pulley assembly, 57-Side pulley assembly, 58-Linear bearing, 59-Slide rod. 6-Heater, 61-Heating plate, 62-Connecting frame, 63-Steering plate, 64-First screw, 65-Second screw, 66-Arc groove, 7-Adjusting mechanism, 71-Second servo motor, 72-Steering gear, 73-Linkage shaft, 74-Coupling, 75-Hollow shaft magnetofluid seal seat, 76-Lead screw, 77-Lead screw nut, 78-Seat-mounted outer spherical ball bearing, 79-Aluminum rod, 8-Bottom shell, 81-Side seal, 9-Face shell. Detailed Implementation

[0045] The embodiments of the present invention will now be briefly described with reference to the accompanying drawings.

[0046] Reference Figure 14 The vacuum insulation panel includes a bottom shell 8 and a top shell 9. The bottom shell 8 has a bottom groove for holding the core material and four side seals 81 at the edge of the bottom groove. An adhesive layer is coated on the side seals 81. The bottom shell 8 and the top shell 9 are combined into a vacuum insulation panel product by vacuum regulation and pressure.

[0047] Example 1

[0048] A vacuum heat sealing device for a vacuum insulation panel, as described in the following figure. Figures 1-2The invention includes a heat sealing table 1, a press system 2, a lifting and opening sealing door 3, and a packaging tray 4. The heat sealing table 1 has a chamber inside, with an opening on one side. A sliding plate 13 is provided on the outside of the opening, and the sliding plate 13 is used to slide with the lifting and opening sealing door 3. A vacuum pumping pipe 11 for external connection to vacuuming is provided on the side wall of the chamber opposite to the opening. A support 12 is provided at the bottom of the chamber. The vacuum pumping pipe 11 is externally connected to a vacuuming device. Since the vacuuming device is a prior art, it is not within the scope of protection of this invention and will not be disclosed in detail in this invention.

[0049] Reference Figure 3 The press system 2 includes a cover plate 21 sealed to the upper part of the heat sealing table 1. Multiple bevel gear screw jacks 22 are provided on one side of the cover plate 21. These multiple bevel gear screw jacks 22 operate synchronously. Specifically, the bevel gear screw jacks 22 are driven by a first servo motor 23, which is connected to the multiple bevel gear screw jacks 22 via a branch of a gear steering box 24 to achieve synchronous lifting. To ensure the lifting pressure of the first servo motor 23 on the bevel gear screw jacks 22, a power output shaft of the first servo motor 23 is equipped with… The reducer is designed to increase torque. The lifting rods of multiple bevel gear screw jacks 22 are connected to an upper pressure plate 25 through a cover plate 21. An upper heat exchange tube 26 is provided inside the bottom surface of the upper pressure plate 25, and a heat conduction plate 27 is provided on the bottom surface of the upper pressure plate 25. The upper heat exchange tube 26 is connected to hot and cold oil circuits, so that the upper heat exchange tube 26 can heat or cool the heat conduction plate 27. When heating, it can further cooperate with the heater 6 to improve the heat sealing effect. When cooling, it can improve the adhesion effect of the heat-sealed product and accelerate the completion of the heat-sealed process.

[0050] A lifting and closing sealing door 3 is located on one side of the opening of the chamber and slides on the sliding plate 13 for sliding opening and loading. The lifting and closing sealing door 3 includes a door body 31, the surface of which is provided with several viewing windows 32 for observing the interior. Multiple sliding seats 33 are provided on both sides of the door body 31. The door body 31 is slidably connected to the sliding plate 13 of the heat sealing table 1 via the sliding seats 33. (Refer to...) Figure 4 , Figure 5The sliding seat 33 includes a movable plate 331. A pair of connecting seats 332 are provided at both ends of the movable plate 331. The connecting seats 332 are screwed together with the door body 31. A sliding space is formed between the connecting seats 332 and the movable plate 331, allowing the sliding plate 13 to slide. A first moving wheel 338 is mounted on the movable plate 331 in the sliding space, and the first moving wheel 338 slides laterally against the sliding plate 13. A second moving wheel 339 is also mounted on the movable plate 331. A cylinder seat 334 is provided on the back of each connecting seat 332. A sealing cylinder 333 is provided on the cylinder seat 334. The telescopic rod end of the sealing cylinder 333 extends through the cylinder seat 334 into the sliding space. The telescopic rod end of the sealing cylinder 333 is rotatably connected to a pressing wheel 337 via a pressing shaft 336. The pressing wheel 337 is positioned opposite to the second moving wheel 339. The body 31 is provided with a hydraulic cylinder 34 for sliding and lifting to open. The hydraulic cylinder 34 is rotatably mounted on the bracket 12. The telescopic rod end of the hydraulic cylinder 34 is rotatably connected to the moving plate 331. The hydraulic cylinder 34 pushes the second moving wheel 339 against the sliding plate 13 and slides along the direction of the sliding plate 13 to achieve closure. The sealing cylinder 333 presses the door body 31 against and presses it against the opening of the chamber through the pressing wheel 337 to seal it. In one preferred configuration, the connecting seat 332 is provided with a pressing groove 335, and the pressing shaft 336 extends laterally in the pressing groove 335. During the process of the sealing cylinder 333 pressing the door body 31 through the pressing wheel 337, the pressing shaft 336 is positioned and smoothly slides and presses through the pressing groove 335. In order to further improve the sealing performance of the chamber, a sealing ring 14 is provided at the opening of the chamber. Thus, after the door body 31 is pressed, the chamber and the door body 31 are more sealed.

[0051] Reference Figure 6 , Figure 7 , Figure 8The packaging tray 4 is movably disposed within the cavity. The packaging tray 4 includes a tray plate 41, with a support plate 42 at its bottom. A support wheel 44 is rotatably mounted on the bottom of the support plate 42, supporting the tray plate 41. A rectangular frame with a side-sealing heating and cooling structure 45 is provided on the upper surface of the tray plate 41, forming a groove between the side-sealing heating and cooling structure 45 and the tray plate 41. When the bottom shell 8 is filled, the bottom shell 8 containing the core material is positioned within the groove between the side-sealing heating and cooling structure 45 by the side-sealing strip 81. The side-sealing heating and cooling structure 45 is used to planarly engage the side-sealing strip 81 of the bottom shell 8 with the heater 6 to achieve uniform heating or rapid cooling after heat sealing. A flexible support rod 43 is provided on the outer side of 45. The support rod 43 is located above the side sealing heating and cooling structure 45. When the face shell 9 is fed, the face shell 9 is supported on the support rod 43, so that the bottom shell 8 and the face shell 9 are positioned vertically relative to each other. Therefore, the feeding of the bottom shell 8 and the face shell 9 is convenient and quick. Multiple sets of rotatable and adjustable heaters 6 are provided around the support rod 43 and are directed toward the side sealing strip 81 for heating. The heaters 6 heat the side sealing strip 81 of the bottom shell 8 quickly to exhaust the air. After the chamber is evacuated by an external vacuum device, the press system 2 is started. The upper pressure plate 25 descends and presses the support rod 43. The support rod 43 moves elastically and presses the face shell 9 onto the side sealing strip 81 of the bottom shell 8 for vacuum pressing.

[0052] To better facilitate the loading of the front shell 9 and the bottom shell 8, the packaging tray 4 adopts a pull-out design. A handle 412 is provided on the side of the tray 41 of the packaging tray 4. The packaging tray 4 is pulled out of the heat-sealing chamber 1 using the handle 412 for loading, thus avoiding spatial operational defects. A lifting mechanism 5 is provided inside the heat-sealing station 1 for the packaging tray 4 to slide out or be positioned within the chamber. Figure 7 , Figure 8 , Figure 9The lifting mechanism 5 includes a pair of lifting seats 51 and a pair of lifting cylinders 52. The lifting seats 51 are movably mounted on both sides of the sealing tray 4. Each lifting seat 51 has two rows of upper pulley sets 55 and lower pulley sets 56 arranged opposite each other. A lifting block 53 is provided at the bottom of the lifting seat 51, and the bottom of the lifting block 53 has an inclined surface 531. The lifting cylinders 52 are located on both sides outside the heat sealing table 1. The telescopic rods of the lifting cylinders 52 extend through the side wall of the heat sealing table 1 to one side of the lifting block 53. A lifting wheel 54 is rotatably mounted at the end of the telescopic rod of the lifting cylinder 52. During heat sealing and pressing, the support wheel 44 abuts against the heat sealing table 1. The bottom is supported, and the tray 41 slides against the lower pulley group 55. When the material is pulled out, the lifting cylinder 52 extends the lifting wheel 54 toward the lifting block 53, so that the lifting wheel 54 abuts against the inclined surface 531. The lifting wheel 54 lifts the lifting seat 51 along the inclined surface 531. After the lifting seat 51 is lifted, the tray 41 slides against the upper part of the lower pulley group 56. The support wheel 44 disengages from the bottom of the heat sealing table 1. The packaging tray 4 slides out of the outside of the heat sealing table 1 by sliding the lower pulley group 56 to realize the loading of the front shell 9 and the bottom shell 8, avoiding the situation where the loading operation of the packaging tray 4 inside the heat sealing table 1 is restricted.

[0053] To achieve the vertical lifting of the lifting seat 51, a linear bearing 58 is provided inside the heat sealing table 1, and a corresponding slide rod 59 is provided at the bottom of the lifting seat 51. The slide rod 59 is sleeved inside the linear bearing 58, so that a sliding connection is formed between the slide rod 59 and the linear bearing 58. Therefore, when the lifting cylinder 52 acts on the lifting block 53 with the inclined surface 531, the lifting seat 51 cooperates well to lift the packaging tray 4 away from the bottom of the heat sealing table 1.

[0054] To further improve the sliding effect of the packaging tray 4, the lifting seat 51 is also equipped with a side pulley group 57. During the process of pulling out the packaging tray 4, the side sliding of the side pulley group 57 on both sides can be used to improve the pulling operation of the packaging tray 4.

[0055] Reference Figure 13In this embodiment of the invention, to better achieve the heat sealing effect, the heater 6 includes a heating plate 61, a connecting frame 62, and a steering plate 63. The heating plate 61 is connected to the steering plate 63. The connecting frame 62 is provided with an arc-shaped groove 66. The steering plate 63 and the connecting frame 62 are rotatably installed through the arc-shaped groove 66. Specifically, two screws can be provided between the connecting frame 62 and the steering plate 63. For example, a first screw 64 initially connects and positions the steering plate 63, and a second screw 65 is provided in the arc-shaped groove 66 centered on the first screw 64. The second screw 65 rotates to achieve the heat sealing effect. The different installation positions inside the arc-shaped groove 66 are adjusted and fixed. The installation can be adjusted by rotating the heater 6, which makes it convenient to adjust the heating effect of the heater 6 on the adhesive of the side seal 81. In this way, the volatile small molecules in the adhesive are preheated and volatilized, so as to avoid the adhesive volatilizing and overflowing into the product in the vacuum environment and affecting the vacuum degree of the product. The heater 61 is an infrared ceramic heater. In the vacuum environment, the infrared ceramic heater uniformly heats the adhesive of the side seal 81 on the bottom shell 8 through infrared thermal radiation, thereby achieving the purpose of venting the adhesive.

[0056] The heaters 6 located in the width direction of the support rod 43 are relatively far apart, and the size differences of different models of the bottom shell 8 result in a large heating distance between the heaters 61 located in the width direction of the support rod 43 and the bottom shell 8. This affects the heating of the side seal 81 of the bottom shell 8 by the heaters 6. Therefore, the present invention specifically provides a distance adjustment mechanism 7, which includes two pairs of lead screws 76. Each pair of lead screws 76 is connected by a coupling 74 to form a synchronously rotating unit. Each pair of lead screws 76 is mounted on both sides of the chamber and parallel to the length direction of the support rod 43. In order to realize the synchronous approach or movement of the heaters 6 in the length direction of the support rod 43, the two lead screws 76 of each pair are provided with opposite thread directions. By using the opposite threads, the synchronous approach or movement of the connected heaters 6 can be achieved when the lead screws 76 rotate synchronously. The end of the lead screw 76 is rotatably connected via a seated outer spherical ball bearing 78. One of the lead screws 76 is also connected to a power mechanism for its rotation. The power mechanism includes a second servo motor 71, which is connected to the lead screw 76 via a steering gear 72, a linkage shaft 73, a coupling 74, and a transmission connection. Between the pairs of lead screws 76 on both sides, there is an aluminum profile rod 79 for mounting the heater 6. The aluminum profile rod 79 is movably connected to the lead screw 76 via a lead screw nut 77. By rotating the power mechanism, the lead screw 76 drives the heater 6 on the aluminum profile rods 79 on both sides to move synchronously closer or further away in the length direction of the support rod 43. This achieves the purpose of adjusting the distance of the heater 6 to the edge seal strip 81 in the width direction of the support rod 43. Of course, in order to ensure the sealing effect of the heat sealing platform 1, in this embodiment, a hollow shaft magnetic fluid sealing seat 75 is provided to realize the transmission connection between the lead screw 76 and the power mechanism.

[0057] Reference Figure 11 The side sealing hot and cold structure 45 includes a side sealing base 453 and a lower heat exchange tube 454. The lower heat exchange tube 454 is located inside the side sealing base 453. A copper pressure plate 451 is fitted on the outside of the side sealing base 453. A silicone rubber pad 452 is provided between the copper pressure plate 451 and the side sealing base 453. The silicone rubber pad 452 rests against the upper surface of the side sealing base 453.

[0058] Multiple spring posts 47 are fixed to the bottom of the support rod 43. Springs 46 are fitted around the outside of the spring posts 47. One end of the spring 46 is supported at the bottom of the support rod 43. A spring sleeve 411 corresponding to the spring 46 is fitted and positioned on the spring sleeve 411 of the support plate 41. The spring sleeve 411 of the support plate 41 has a clearance groove inside that corresponds to the up and down movement of the spring posts 47. With the help of the springs 46, the support rod 43 can move elastically above the side sealing hot and cold structure 45.

[0059] To better position the faceplate 9, the support rod 43 has several clamping clips 48 on its surface for securing the edges of the faceplate 9. (Refer to...) Figure 12 The fixing clip 48 includes a clamping seat 481 fixed to the surface of the support rod 43. Preferably, the surface of the clamping seat 481 is flush with the surface of the support rod 43. A clamping rod 482 is hinged to one end of the clamping seat 481. A clamping spring 483 is provided at the hinge point between the clamping rod 482 and the clamping seat 481. The clamping spring 483 causes the clamping rod 482 to press down and elastically press against the surface of the clamping seat 481. To better achieve the clamping rod 482 clamping the face shell 9 onto the clamping seat 481, a rubber sleeve 484 is also provided on the clamping rod 482. To better achieve the opening operation of the fixing clip 48, a bending protrusion 4821 is provided on the clamping rod 482 for a handle operation. The fixing clip 48 is opened by pulling up the bending protrusion 4821, thereby facilitating the positioning of the face shell 9 on the support rod 43. After the fixing clip 48 is pressed down by the bending protrusion 4821, the clamping rod 482 elastically presses against the clamping seat. The surface of 481 allows the edge of the face shell 9 to be positioned and fixed on the support rod 43, thus facilitating the positioning of the face shell 9 and the heat sealing with the bottom shell 8. At the same time, the fixing clip 48 clamps and fixes the edge of the face shell 9. During the process of the heater 6 heating the glue to release the glue, the fixing clip 48 partially blocks the heat radiation of the heater 6 and clamps and fixes the edge, preventing the edge of the face shell 9 from curling due to localized heating after heat irradiation. Therefore, the edge of the face shell 9 will not be affected during the process of the heater 6 irradiating the side seal strip 81 of the bottom shell 8. After heat sealing, the fixing clip 48 can also clamp the edge of the face shell 9, so that when the press system 2 is raised, the support rod 43 is raised and the heat-sealed vacuum insulation board of the product is also raised and removed from the inner groove of the side seal hot and cold structure 45, thus facilitating the removal of the vacuum insulation board of the product.

[0060] Example 2

[0061] A vacuum heat sealing device and its heat sealing process for a vacuum insulation panel include the following steps:

[0062] S1, open the lifting and closing sealing door 3, start the lifting mechanism 5, lift the packaging tray 4 and pull it out from the heat sealing table 1 to the outside of the lifting and closing sealing door 3, position the bottom shell 8 on the surface of the copper pressure plate 451 of the side sealing hot and cold structure 45 of the packaging tray 4 and position it, then position the front shell 9 on the surface of the support rod 43 and press it with the fixing clamp 48. After loading, push the packaging tray 4 into the heat sealing table 1 and close the lifting and closing sealing door 3.

[0063] S2, activate the external vacuum pump to evacuate the inside of the heat sealing stage 1. When the vacuum level inside the heat sealing stage 1 reaches 8×10⁻⁶... -2 When the pressure reaches Pa, heater 6 is turned on to heat the adhesive on the side seal 81 of the bottom shell 8. The temperature of heater 6 is controlled between 40℃ and 100℃, and the heating is maintained for 10 to 30 seconds. The vacuum degree is 8×10⁻⁶. -2 After Pa stabilizes for 5-10 seconds, the exhaust process ends.

[0064] S3, heat sealing stage 1 continues to evacuate vacuum until the vacuum level reaches 8×10. -3 At Pa, mold temperature oil of 90℃~130℃ is introduced into the upper heat exchanger 26 and the lower heat exchanger 454 to maintain the surface temperature of the heat conduction plate 27 and the copper pressure plate 451 at 90℃~130℃. Press system 2 is turned on, and the upper pressure plate 25 heat seals the face shell 9 onto the side seal strip 81 of the bottom shell 8. The heat sealing time is controlled at 20~130s, and the pressure is held for 3~5s.

[0065] S4. After heat sealing, turn off heater 6 and stop vacuuming. While keeping the upper pressure plate 25 pressed, switch the upper heat exchanger 26 and the lower heat exchanger 454 to introduce mold temperature oil of 20℃~30℃, so that the side seal 81 can be cooled and shaped at a temperature of 20℃~30℃.

[0066] S5, after the vacuum is broken on the heat-sealing platform 1, the lifting and closing sealing door 3 is opened, the press system 2 is started, the upper pressure plate 25 is lifted off the surface of the support rod 43, and the support rod 43 automatically lifts the heat-sealed vacuum insulation board above the side sealing hot and cold structure 45 through the face shell 9. The lifting mechanism 5 is activated to lift the packaging tray 4 and pull it out from inside the heat-sealing platform 1 to the outside of the lifting and closing sealing door 3. The heat-sealed vacuum insulation board is then removed from the support rod 43. The above embodiments only illustrate the implementation of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A vacuum heat sealing device for a vacuum insulation panel, characterized in that, include: Heat sealing table, press system, lifting and opening sealing door, packaging tray; The heat sealing station has a chamber inside, with an opening on one side of the chamber. A sliding plate is provided on the outside of the opening. A vacuum pumping pipe for external connection and vacuuming is provided on the side wall of the chamber opposite to the opening. A support is provided at the bottom of the chamber. The press system includes a cover plate that is sealed to the upper part of the heat sealing platform. A plurality of bevel gear screw jacks are provided on one side of the cover plate. The plurality of bevel gear screw jacks lift synchronously. The lifting rods of the plurality of bevel gear screw jacks are connected to an upper pressure plate through the cover plate. An upper heat exchange tube is provided inside the bottom surface of the upper pressure plate. A heat conduction plate is provided on the bottom surface of the upper pressure plate. The lifting and closing sealing door is located on one side of the opening of the chamber and slides on the sliding plate for sliding opening and feeding. The packaging tray is movably disposed within the cavity. The packaging tray includes a tray plate with a support plate at its bottom. A support wheel is rotatably mounted on the bottom of the support plate. A rectangular frame with a side-sealing heating and cooling structure is provided on the upper surface of the tray plate. A groove is formed between the side-sealing heating and cooling structure and the tray plate. The bottom shell containing the core material is positioned in the groove by the side seal strip. An elastically movable support rod is provided on the outside of the side-sealing heating and cooling structure. The support rod is located above the side-sealing heating and cooling structure. The top shell is supported on the support rod, so that the bottom shell and the top shell are positioned vertically relative to each other. Multiple sets of rotatable and adjustable heaters are provided around the support rod, which heat the side seal strip of the bottom shell to exhaust the air. After the cavity is evacuated, the upper pressure plate descends and presses the support rod. The support rod moves elastically and presses the top shell onto the side seal strip of the bottom shell for vacuum sealing. The packaging tray includes a lifting mechanism for sliding out or positioning within the chamber. The lifting mechanism includes a pair of lifting seats and a pair of lifting cylinders. The lifting seats are movably disposed on both sides of the packaging tray. Each lifting seat has two rows of upper pulleys and a lower pulley assembly arranged opposite each other. A lifting block is located at the bottom of each lifting seat, and the bottom of the lifting block has an inclined surface. The lifting cylinders are disposed on both sides outside the heat sealing platform. The extension rods of the lifting cylinders extend through the sidewall of the heat sealing platform to one side of the lifting block. The end of the retractable rod is equipped with a lifting wheel. During heat sealing and pressing, the support wheel abuts against the bottom of the heat sealing platform for support, and the tray slides against the lower part of the upper pulley group. When the material is pulled out for loading, the lifting cylinder extends the lifting wheel toward the lifting block, so that the lifting wheel abuts against the inclined surface. The lifting wheel lifts the lifting seat along the inclined surface. After the lifting seat is lifted, the tray slides against the upper part of the lower pulley group. The support wheel disengages from the bottom of the heat sealing platform, and the packaging tray slides out of the outside of the heat sealing platform by sliding the lower pulley group to realize the loading of the top shell and bottom shell.

2. The vacuum heat sealing device for a vacuum insulation panel according to claim 1, characterized in that: The heater includes a heating plate, a connecting frame, and a steering plate. The heating plate is connected to the steering plate, and the connecting frame is provided with an arc-shaped groove. The steering plate and the connecting frame are rotatably installed through the arc-shaped groove.

3. The vacuum heat sealing device for a vacuum insulation panel according to claim 1, characterized in that: The heater located in the width direction of the support rod is equipped with an adjustment mechanism, which includes two pairs of lead screws. Each pair of lead screws is connected by a coupling to rotate synchronously. Each pair of lead screws is mounted on both sides of the chamber and parallel to the length direction of the support rod. The two lead screws in each pair have opposite thread directions. The ends of the lead screws are rotatably connected by seated spherical bearings. One of the lead screws is also connected to a power mechanism for its rotation. An aluminum profile rod for mounting the heater is provided between the pairs of lead screws on both sides. The aluminum profile rod is movably connected to the lead screw through a lead screw nut. By rotating the power mechanism, the lead screw drives the heaters on the aluminum profile rods on both sides to move synchronously closer or further away in the length direction of the support rod. The power mechanism includes a second servo motor, which is connected to the lead screw through a steering gear, a linkage shaft, and a coupling.

4. The vacuum heat sealing device for a vacuum insulation panel according to claim 1, characterized in that: The lifting and opening sealing door includes a door body. Multiple sliding seats are provided on both sides of the door body. The sliding seats are slidably connected to a heat-sealing platform. Each sliding seat includes a movable plate. A pair of connecting seats are fixedly connected to the door body at both ends of the movable plate. A sliding space is formed between the connecting seats and the movable plate, allowing the sliding plate to slide. A first movable wheel is mounted on the movable plate, and the first movable wheel slidably abuts against the sliding plate. A second movable wheel is mounted on the movable plate. A cylinder seat is provided on the back of each connecting seat, and a sealing cylinder is mounted on the cylinder seat. The telescopic rod end of the sealing cylinder extends through the cylinder seat into the sliding space. The telescopic rod end of the sealing cylinder is rotatably connected to a pressure wheel via a pressure shaft, and the pressure wheel is arranged opposite to the second moving wheel. The door body is provided with a hydraulic cylinder for sliding and lifting to open. The hydraulic cylinder is rotatably mounted on the bracket. The telescopic rod end of the hydraulic cylinder is rotatably connected to the moving plate. The hydraulic cylinder pushes the second moving wheel against the sliding plate and slides along the direction of the sliding plate to achieve closure. The sealing cylinder presses the door body against and presses it against the opening of the chamber through the pressure wheel to seal it.

5. The vacuum heat sealing device for a vacuum insulation panel according to claim 4, characterized in that: The surface of the door is also provided with several viewing windows for observing the interior.

6. The vacuum heat sealing device for a vacuum insulation panel according to claim 1, characterized in that: The heat sealing platform is equipped with a linear bearing, and the bottom of the lifting seat is equipped with a sliding rod corresponding to the linear bearing. The sliding rod is sleeved inside the linear bearing, so that a sliding connection is formed between the sliding rod and the linear bearing.

7. The vacuum heat sealing device for a vacuum insulation panel according to claim 1, characterized in that: The edge sealing hot and cold structure includes an edge sealing base and a lower heat exchange tube. The lower heat exchange tube is disposed inside the edge sealing base. A copper pressure plate is fitted onto the outside of the edge sealing base. A silicone rubber pad is provided between the copper pressure plate and the edge sealing base. The silicone rubber pad rests against the upper surface of the edge sealing base.

8. The vacuum heat sealing device for a vacuum insulation panel according to claim 1, characterized in that: The support rod has multiple spring posts fixed at its bottom. Springs are fitted around the outside of the spring posts. One end of the spring is supported at the bottom of the support rod, and the other end of the spring is fitted and positioned on the support plate. The support plate is provided with clearance grooves corresponding to the up and down movement of the spring posts. With the help of the springs, the support rod can move elastically above the side sealing hot and cold structure.

9. The vacuum heat sealing device for a vacuum insulation panel according to claim 1, characterized in that: The support rod has several fixing clips installed on its surface for clamping the edge of the face shell. Each fixing clip includes a clamping seat fixed to the surface of the support rod. One end of the clamping seat is hinged to a clamping rod. A clamping spring is provided at the hinge point between the clamping rod and the clamping seat. The clamping spring causes the clamping rod to press down and elastically press against the surface of the clamping seat. A rubber sleeve is fitted on the clamping rod.

10. The vacuum heat-sealing process of the vacuum insulation panel according to any one of claims 1-9, characterized in that, Includes the following steps: S1, open the lifting and closing sealing door, start the lifting mechanism, lift the packaging tray and pull it out from the heat sealing table to the outside of the lifting and closing sealing door, position the bottom shell on the surface of the copper pressure plate of the side sealing hot and cold structure of the packaging tray and position it, then position the top shell on the surface of the support rod and use the fixing clamp to press and fix it. After loading, push the packaging tray into the heat sealing table and close the lifting and closing sealing door. S2, activate the external vacuum pump to evacuate the inside of the heat sealing stage. When the vacuum level inside the heat sealing stage reaches 8×10⁻⁶... - 2 At a pressure of Pa, the heater is turned on to heat the adhesive on the edge seal of the bottom shell. The heater temperature is controlled between 40℃ and 100℃, and the heating is maintained for 10 to 30 seconds. The vacuum degree is 8×10⁻⁶. -2 After Pa stabilizes for 5-10 seconds, the exhaust process ends. S3, the heat sealing stage continues to evacuate vacuum until the vacuum level reaches 8×10. -3 At Pa, mold temperature oil of 90℃~130℃ is introduced into the upper heat exchanger tube and the lower heat exchanger tube to maintain the surface temperature of the heat conduction plate and the copper pressure plate at 90℃~130℃. The press system is turned on, and the upper pressure plate heat seals the face shell onto the side seal of the bottom shell. The heat sealing time is controlled at 20~130s, and the pressure is held for 3~5s. S4. After heat sealing, turn off the heater and stop vacuuming. While keeping the upper pressure plate pressed, simultaneously switch the upper heat exchanger tube and the lower heat exchanger tube to introduce mold temperature oil of 20℃~30℃ to make the edge seal strip cool down quickly and set at a temperature of 20℃~30℃. S5, after breaking the vacuum on the heat sealing platform, open the lifting and closing sealing door, start the press system, the upper pressure plate is lifted off the surface of the support rod, the support rod automatically lifts the heat-sealed vacuum insulation board above the side sealing hot and cold structure through the shell, start the lifting mechanism, lift the packaging tray and pull it out from the heat sealing platform to the outside of the lifting and closing sealing door, and take out the heat-sealed vacuum insulation board from the support rod.

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