Hot pressing device and method for producing LCD (Liquid Crystal Display)

Abstract

The invention discloses a hot pressing device and method for LCD liquid crystal display screen production. The hot pressing device comprises a base, a support is arranged on the base, an air cylinder is arranged above the support, the output end of the air cylinder penetrates through the upper surface of the support to be connected with a connecting element, and the lower portion of the connecting element is connected with a hot pressing element. A heat preservation module and a heat dissipation module are arranged in the hot-pressing element, an annularly-formed blind groove is formed in the lower surface of the hot-pressing element, the heat preservation module comprises a plurality of springs arranged in the blind groove, the lower ends of the springs are fixedly connected with a heat preservation frame, and a shaft rod is arranged on one side of the heat preservation frame; a heat preservation film is connected to the shaft rod in a rolling mode, the movable end of the heat preservation film penetrates through one face of the heat preservation frame and is fixedly connected with a film rod, connecting lines are bound to the two ends of the film rod, and the device solves the problem that an existing hot pressing device cannot reasonably control heat preservation and heat dissipation work of a hot pressing plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of LCD liquid crystal display production, and specifically relates to a hot pressing device and method for LCD liquid crystal display production. Background Art

[0002] Hot pressing technology plays an important role in the production process of LCD liquid crystal displays. The hot press softens and makes the glue or adhesive inside the liquid crystal display flow by heating and pressing, so as to fill the tiny gaps between the screen and the backlight panel or other components. Under the combined action of pressure and temperature, the adhesive can quickly solidify to form a firm bonding layer. This hot pressing technology can provide uniform heating and stable pressure, enabling the various components of the LCD liquid crystal display to be tightly combined, preventing air and moisture from entering, thereby improving the encapsulation quality; moreover, it can make the contact between the components of the LCD liquid crystal display closer, reducing light scattering and reflection, thereby improving the display effect; it can also enhance the weather resistance and impact resistance of the LCD liquid crystal display, improving the reliability and service life of the product.

[0003] Nowadays, the hot pressing device in the production process of LCD liquid crystal displays still has problems in reasonably controlling the heat preservation and heat dissipation of the hot pressing plate. That is, the hot pressing plate needs to maintain a certain temperature during the heating process. If the heat preservation measures are insufficient, the temperature of the hot pressing plate will drop rapidly, affecting the hot pressing effect; insufficient heat preservation will cause the hot press to consume more energy to maintain the required temperature, thereby increasing production costs; temperature fluctuations will affect the stability of the hot pressing process, resulting in unstable product quality. At the same time, if the hot pressing plate cannot dissipate heat in time, the temperature will be too high, which will damage the equipment or reduce the service life; too high a temperature will affect the thermoplastic state of the material, resulting in a decline in product quality, such as the liquid crystal display may have problems such as bubbles and deformation; the high-temperature environment may cause safety hazards such as fires. This phenomenon has become an urgent problem to be solved by those in this field. Summary of the Invention

[0004] The purpose of the present invention is to provide a hot pressing device and method for LCD liquid crystal display production for the existing device, so as to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the first aspect of the present invention provides the following technical solution: A hot pressing device for LCD liquid crystal display production, including a base, a bracket is arranged on the base, a cylinder is arranged above the bracket, the output end of the cylinder passes through the upper surface of the bracket and is connected with a connecting element, a hot pressing element is connected below the connecting element, and a heat preservation module and a heat dissipation module are arranged inside the hot pressing element;

[0006] The lower surface of the hot pressing element is provided with blind grooves arranged in a ring shape. The heat preservation module includes a plurality of springs arranged in the blind grooves. The lower ends of the springs are fixedly connected with a heat preservation frame. One side of the heat preservation frame is provided with a shaft rod. A heat preservation film is wound and connected on the shaft rod. The movable end of the heat preservation film passes through one side of the heat preservation frame and is fixedly connected with a film rod. Connecting wires are tied to both ends of the film rod. The other ends of the connecting wires are wound and connected with wire spools respectively. The shaft rod and the wire spools are respectively connected to a power source. When the shaft rod rotates, the heat preservation film is wound. When the wire spools rotate, the heat preservation film is unfolded by winding the connecting wires.

[0007] The hot pressing element is provided with a central cavity and an outer ring cavity. The heat dissipation module includes a sliding plate slidably connected in the central cavity. The outer side of the sliding plate is connected with an inner frame. An outer frame is arranged on the outer side of the inner frame. Upper and lower two rows of ventilation holes are opened on both the hot pressing element and the outer frame. Two rows of matching holes are correspondingly opened on the inner frame directly below the ventilation holes. A micro fan is arranged in each ventilation hole of the lower row. When the hot pressing element overheats, the gas in the central cavity expands due to heat, pushing the sliding plate to drive the inner frame to move upward. The ventilation holes and the matching holes are communicated, and the micro fans are started to introduce cold air into the central cavity, while the hot air exits through the upper row of communicated holes.

[0008] The present invention further illustrates that the heat preservation frame is adapted to the blind groove. Long grooves are opened on both opposite sides of the lower surface of the heat preservation frame. The connecting wires pass through the long grooves and are connected to the shaft rod and the wire spools on the other two opposite sides.

[0009] The present invention further illustrates that one end of the shaft rod is connected with a coupling. The other end of the coupling is connected with a motor. The motor serves as the power source of the shaft rod. The motor is fixedly connected with a motor sleeve. The motor sleeve is fixedly installed on the heat preservation frame.

[0010] The present invention further illustrates that a double-shaft motor is commonly connected between the two wire spools. The double-shaft motor serves as the power source of the wire spools. The double-shaft motor is fixedly connected with a motor frame. The motor frame is fixedly installed on the heat preservation frame.

[0011] The present invention further illustrates that a plurality of connecting plates are adhesively connected around the sliding plate. Elastic columns are arranged above the connecting plates. The other ends of the connecting plates are adhesively connected with the inner frame together. The sliding plate and the connecting plates are connected through the connecting plates.

[0012] The present invention further illustrates that the connecting element includes a connecting plate. The output end of the cylinder is fixedly connected with the connecting plate. A heat insulation plate is fixedly connected below the connecting plate. The lower part of the heat insulation plate is fixedly connected with the hot pressing element.

[0013] The present invention is further described as follows. A heating element is provided inside the central cavity, and an upper cover is snap-connected to the hot pressing element.

[0014] The present invention is further described as follows. A fixed platform is fixedly arranged on the bracket. A sliding plate is slidably connected inside the fixed platform. The sliding plate has a "convex" shape structure, and the shape of the fixed platform is designed to be adapted to that of the sliding plate. The relatively lower two sides of the "convex" part of the sliding plate are truncated at the rear, and telescopic rods are fixedly connected to both truncated cross-sections. The other end of each telescopic rod extends backward and is fixedly connected to the inner side of the bracket.

[0015] The present invention is further described as follows. Four guiding columns are also fixedly arranged on the bracket, and the four guiding columns sequentially pass upward through the four corner positions of the fixed platform, the connecting element, and the hot pressing element until the upper surface of the bracket.

[0016] In the second aspect of the present invention, a hot pressing method using the hot pressing device for LCD liquid crystal display production described in the first aspect of the present application is provided, including: the telescopic rods extend to push the sliding plate to slide outward. It should be noted that when the telescopic rods extend to the longest distance, the relatively lower two sides of the "convex" part of the sliding plate still do not completely slide out of the fixed platform. Place the LCD liquid crystal display to be hot pressed on the sliding plate. Subsequently, the telescopic rods retract to drive the sliding plate to slide inward to the initial position. The cylinder is activated to drive the hot pressing element to move downward through the connecting element. The heating element is activated to heat the hot pressing element. When the hot pressing element moves downward, the heat preservation frame first contacts the upper surface of the sliding plate. The hot pressing element continues to move downward, and the spring is compressed so that the sliding plate and the two sets of power systems fixedly connected thereto retract into the blind groove on the lower surface of the sliding plate until the lower surface of the hot pressing element is closely attached to the LCD liquid crystal display to be hot pressed, and hot pressing work is carried out. After the hot pressing work is completed, the cylinder drives the hot pressing element to move upward to the initial position through the connecting element to complete the hot pressing work;

[0017] To ensure that the temperature of the hot pressing element does not drop rapidly during the upward waiting for material change in the process of hot pressing the LCD liquid crystal display screen in sequence, when the cylinder drives the hot pressing element to move upward, the electric motor is turned off, and when the double-shaft motor starts to drive the two spools to rotate simultaneously, by winding the connecting wire, the connecting wire pulls the film rod to move towards the spool direction, so that the heat preservation film unfolds and is laid on the hot pressing element between the heat preservation frames, playing a role in heat insulation and preservation. When the cylinder drives the hot pressing element to move downward, the double-shaft motor is turned off, and the electric motor starts to drive the shaft rod to rotate through the coupling, and by winding the connecting wire, the connecting wire pulls the film rod to move towards the shaft rod direction, completing the winding of the heat preservation film, and the hot pressing element continues to move downward to complete the hot pressing work on the LCD liquid crystal display screen to be hot pressed below;

[0018] When the temperature inside the hot pressing element is too high, the gas in the central cavity expands due to heat and pushes the sliding plate to drive the inner frame to squeeze the elastic column to move upward. It should be noted that only when the temperature in the central cavity is too high, the expanded gas can push the sliding plate to squeeze the elastic column. Then, the ventilation hole and the matching hole are communicated. When the sliding plate drives the inner frame to slide to the highest position, the ventilation hole and the matching hole completely coincide, and the micro fan starts, and cold air is introduced into the central cavity, while hot air exits through the holes communicated with the upper row. The higher the temperature inside the central cavity, the larger the channel where the ventilation hole and the matching hole coincide and are communicated, and the faster the air exchange efficiency inside the central cavity, until the hot pressing element is effectively cooled, the volume of the gas in the central cavity shrinks, and the sliding plate drives the inner frame to squeeze the elastic column to move downward to the initial position.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are: In the present invention,

[0020] (1) By setting that the electric motor is turned off, and when the double-shaft motor starts to drive the two spools to rotate simultaneously, by winding the connecting wire, the connecting wire pulls the film rod to move towards the spool direction, so that the heat preservation film unfolds and is laid on the hot pressing element between the heat preservation frames, to achieve the heat insulation and preservation effect on the hot pressing element;

[0021] (2) By setting that the gas in the central cavity expands when heated, pushing the slide plate to drive the inner frame to extrude the elastic column to move upward, the ventilation holes and the mating holes are communicated, and when the slide plate drives the inner frame to slide to the highest position, the ventilation holes and the mating holes completely coincide. At this time, the micro fan starts, and cold air is introduced into the central cavity, while hot air is discharged through the holes communicated with the upper row. The higher the temperature inside the central cavity, the larger the channel where the ventilation holes and the mating holes coincide and communicate, and the faster the air exchange efficiency inside the central cavity, until the hot pressing element is effectively cooled. Then, the volume of the gas in the central cavity shrinks, and the slide plate drives the inner frame to extrude the elastic column to move downward to the initial position, forming an effective heat dissipation cycle to realize the heat dissipation work of the hot pressing element. Description of the Drawings

[0022] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 is the schematic diagram of the overall structure of the embodiment of the present invention;

[0024] Figure 2 is the cross-sectional view of the overall structure of the embodiment of the present invention;

[0025] Figure 3 is the enlarged view of area A of the embodiment of the present invention;

[0026] Figure 4 is the schematic diagram of the connection between the slide plate and the inner frame of the embodiment of the present invention;

[0027] Figure 5 is the enlarged view of area B of the embodiment of the present invention;

[0028] Figure 6 is the partial connection schematic diagram of the slide plate of the embodiment of the present invention;

[0029] Figure 7 is the schematic diagram of the structure of the driving part of the heat insulation module of the embodiment of the present invention;

[0030] Figure 8 is the partial top view of area C of the embodiment of the present invention;

[0031] Figure 9 is the partial top view of area D of the embodiment of the present invention;

[0032] Figure 10 is the schematic diagram of the connection between the sliding plate and the telescopic rod of the embodiment of the present invention;

[0033] Figure 11 is the schematic diagram of the ventilation holes and the mating holes of the embodiment of the present invention

[0034] In the figure: 1, base; 2, bracket; 3, cylinder; 4, connecting element; 41, connecting plate; 42, heat insulation plate; 5, hot pressing element; 50, upper cover; 51, central cavity; 52, outer ring cavity; 53, blind groove; 54, heating element; 6, heat preservation module; 60, heat preservation film; 601, film rod; 61, spring; 62, heat preservation frame; 621, long groove; 63, motor sleeve; 64, motor; 65, coupling; 66, shaft rod; 67, motor frame; 68, double-shaft motor; 681, connecting wire; 69, wire spool; 7, heat dissipation module; 71, sliding plate; 72, connecting plate; 73, elastic column; 74, inner frame; 75, outer frame; 76, ventilation hole; 77, mating hole; 78, micro fan; 8, fixing table; 9, guiding post; 10, sliding plate; 11, telescopic rod. Specific embodiments

[0035] The technical solution of the present invention will be further described in detail and non-limitingly below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Refer to Figures 1 to 11 , the embodiments of the present invention provide a hot pressing device and method for LCD liquid crystal display production, Figure 1 is a schematic diagram of the overall structure of the embodiment of the present invention. As shown in Figure 1 and Figure 2 shown, the hot pressing device and method for LCD liquid crystal display production includes a base 1, a bracket 2 is arranged on the base 1, a cylinder 3 is arranged above the bracket 2, the output end of the cylinder 3 passes through the upper surface of the bracket 2 and is connected with a connecting element 4, a hot pressing element 5 is connected below the connecting element 4, and a heat preservation module 6 and a heat dissipation module 7 are arranged inside the hot pressing element 5. Using the cylinder 3 as a power source, it drives the connecting element 4 and the hot pressing element 5 to complete the up and down movement work.

[0037] As shown in Figure 3 shown, a blind groove 53 arranged in a ring shape is opened on the lower surface of the hot pressing element 5. The heat preservation module 6 includes a plurality of springs 61 arranged in the blind groove 53. The lower end of the spring 61 is fixedly connected with a heat preservation frame 62, and the heat preservation frame 62 is adapted to the blind groove 53. As shown in Figure 7 and Figure 8As shown, one side of the heat preservation frame 62 is provided with a shaft rod 66. A heat preservation film 60 is wound and connected to the shaft rod 66. The movable end of the heat preservation film 60 passes through one side of the heat preservation frame 62 and is fixedly connected to a film rod 601. Both ends of the film rod 601 are tied with connecting wires 681. The other ends of the connecting wires 681 are wound and connected to wire spools 69. The shaft rod 66 and the wire spools 69 are respectively connected to a power source. When the shaft rod 66 rotates, the heat preservation film 60 is wound. When the wire spools 69 rotate, the heat preservation film 60 is unfolded by winding the connecting wires 681.

[0038] As Figure 3 shown, a central cavity 51 and an outer ring cavity 52 are formed in the hot pressing element 5. The heat dissipation module 7 includes a sliding plate 71 slidably connected in the central cavity 51. An inner frame 74 is connected to the outside of the sliding plate 71, and an outer frame 75 is arranged outside the inner frame 74. As Figure 5 and Figure 11 shown, upper and lower rows of ventilation holes 76 are formed in both the hot pressing element 5 and the outer frame 75. Two rows of matching holes 77 are correspondingly formed in the inner frame 74 directly below the ventilation holes 76. A micro fan 78 is arranged in each ventilation hole 76 in the lower row. When the temperature in the hot pressing element 5 is too high, the gas in the central cavity 51 expands due to heat, pushing the sliding plate 71 to drive the inner frame 74 to move upward. The ventilation holes 76 and the matching holes 77 are communicated, and the micro fan 78 is started to suck in cold air and introduce it into the central cavity 51 through this channel. The heated hot air is discharged from the communicated ventilation holes 76 and the matching holes 77 above, forming an effective heat dissipation cycle.

[0039] In some preferred embodiments, as Figure 7 and Figure 8 shown, long grooves 621 are formed in opposite sides of the lower surface of the heat preservation frame 62. The connecting wires 681 pass through the long grooves 621 and are connected to the shaft rods 66 and the wire spools 69 on the other two opposite sides.

[0040] In some preferred embodiments, as Figure 7 shown, one end of the shaft rod 66 is connected to a coupling 65, and the other end of the coupling 65 is connected to a motor 64. The motor 64 serves as the power source of the shaft rod 66. The motor 64 is fixedly connected to a motor sleeve 63, and the motor sleeve 63 is fixedly installed on the heat preservation frame 62. With the motor 64 as the power source, when the motor 64 is started to drive the shaft rod 66 to rotate through the coupling 65, the connecting wires 681 are wound, and the connecting wires 681 pull the film rod 601 to move towards the shaft rod 66 until it is close to one side of the heat preservation frame 62, completing the winding work of the heat preservation film 60.

[0041] In some preferred embodiments, such as Figure 7 and Figure 9 shown, a dual-axis motor 68 is commonly connected between the two spools 69. The dual-axis motor 68 serves as the power source for the spools 69. The dual-axis motor 68 is fixedly connected to a motor bracket 67, and the motor bracket 67 is fixedly installed on the heat preservation frame 62. With the dual-axis motor 68 as the power source, when the dual-axis motor 68 starts to drive the two spools 69 to rotate simultaneously, by winding the connecting wire 681, the connecting wire 681 pulls the film rod 601 towards the spools 69 until it is close to the other side of the heat preservation frame 62, so that the heat preservation film 60 is unfolded and laid on the hot pressing element 5 between the heat preservation frames 62, playing the role of heat insulation for the hot pressing element 5.

[0042] In some alternative embodiments, such as Figure 3 shown, the design of the blind groove 53 can provide clearance for the overall structure of the shaft rod 66, the spool 69 and their respective connected power sources.

[0043] In some preferred embodiments, such as Figure 4 and Figure 6 shown, a plurality of connecting plates 72 are adhesively bonded around the sliding plate 71. Elastic columns 73 are arranged above the connecting plates 72. The other ends of the connecting plates 72 are adhesively bonded to an inner frame 74 together. The sliding plate 71 and the connecting plates 72 are connected through the connecting plates 72. Grooves adapted to the connecting plates 72 are provided on the hot pressing element 5, which is beneficial for the connecting plates 72 to slide up and down along the grooves. The elastic columns 73 are components that can provide buffering. Only when the gas heated and expanded under the condition of too high temperature in the central cavity 51 can push the sliding plate 71 to squeeze the elastic columns 73. When the temperature in the central cavity 51 is too high, the gas heated and expanded will push the sliding plate 71 to move, and trigger the heat dissipation mechanism by squeezing the elastic columns 73, making the heat dissipation module 7 simple and effective, and capable of automatically responding to temperature changes and protecting the device from overheating damage without the need for an external power source or a complex control system.

[0044] In some preferred embodiments, such as Figure 2 shown, the connecting element 4 includes a connecting plate 41. The output end of the cylinder 3 is fixedly connected to the connecting plate 41. An insulating plate 42 is fixedly connected below the connecting plate 41, and the insulating plate 42 is fixedly connected to the hot pressing element 5 below. The insulating plate 42 is a component for reducing heat transfer. The insulating plate 42 is fixedly connected below the connecting plate 41, and its main function is to isolate the connecting plate 41 and the cylinder 3 from the heat of the hot pressing element 5.

[0045] In some preferred embodiments, such as Figure 3As shown, a heating element 54 is disposed inside the central cavity 51, and an upper cover 50 is snap-connected to the hot pressing element 5. The heating element 54 can generate heat and transfer the heat to the hot pressing element 5, thereby performing the hot pressing operation on the LCD liquid crystal display screen.

[0046] In some preferred embodiments, such as Figure 1 and Figure 10 As shown, a fixed platform 8 is fixedly arranged on the bracket 2, a sliding plate 10 is slidably connected inside the fixed platform 8, the sliding plate 10 has a "convex" shape structure, and the shape of the fixed platform 8 is designed to be adapted to that of the sliding plate 10. The relatively lower two sides of the "convex" part of the sliding plate 10 are truncated at the rear, and telescopic rods 11 are fixedly connected to both truncated surfaces. The other end of each telescopic rod 11 extends backward and is fixedly connected to the inner side of the bracket 2. Using the telescopic rod 11 as a power source, when the telescopic rod 11 extends, it pushes the sliding plate 10 to slide outwards. It should be noted that when the telescopic rod 11 extends to the longest distance, the relatively lower two sides of the "convex" part of the sliding plate 10 still do not completely slide out of the fixed platform 8. Place the LCD liquid crystal display screen to be hot pressed on the sliding plate 10, and then the telescopic rod 11 retracts to drive the sliding plate 10 to slide inwards to the initial position, thereby completing the feeding operation of the LCD liquid crystal display screen to be hot pressed.

[0047] In some preferred embodiments, such as Figure 1 As shown, four guiding columns 9 are further fixedly arranged on the bracket 2, and the four guiding columns 9 all pass upwards through the four corner positions of the fixed platform 8, the connecting element 4, and the hot pressing element 5 in sequence until the upper surface of the bracket 2. The guiding columns 9 are used to ensure that the connecting element 4 and the hot pressing element 5 remain vertical during the moving process.

[0048] In the above embodiment, the hot pressing method of the hot pressing device for producing an LCD liquid crystal display screen includes: the telescopic rod 11 extends to push the sliding plate 10 to slide outwards, and the LCD liquid crystal display screen to be hot pressed is placed on the sliding plate 10. Subsequently, the telescopic rod 11 retracts to drive the sliding plate 10 to slide inwards to the initial position. The cylinder 3 is activated to drive the hot pressing element 5 to move downwards through the connecting element 4. The heating element 54 is activated to heat the hot pressing element 5. When the hot pressing element 5 moves downwards, the heat preservation frame 62 first contacts the upper surface of the sliding plate 10. The hot pressing element 5 continues to move downwards, and the spring 61 is compressed so that the sliding plate 10 and the two sets of power systems fixedly connected thereto retract into the blind groove 53 on the lower surface of the sliding plate 10 until the lower surface of the hot pressing element 5 is in close contact with the LCD liquid crystal display screen to be hot pressed, and the hot pressing work is carried out. After the hot pressing work is completed, the cylinder 3 drives the hot pressing element 5 to move upwards to the initial position through the connecting element 4, and the hot pressing work is completed.

[0049] To ensure that the temperature of the hot pressing element 5 does not drop rapidly during the rising and waiting-for-material-changing work when sequentially hot pressing the LCD liquid crystal display screen, during the process of the cylinder 3 driving the hot pressing element 5 to move upwards, the motor 64 is turned off, and the double-shaft motor 68 is activated to drive the two wire shafts 69 to rotate simultaneously. By winding the connecting wire 681, the connecting wire 681 pulls the film rod 601 towards the wire shaft 69 direction, so that the heat preservation film 60 unfolds and is laid on the hot pressing element 5 between the heat preservation frames 62, playing a role of heat insulation and heat preservation. During the process of the cylinder 3 driving the hot pressing element 5 to move downwards, the double-shaft motor 68 is turned off, and the motor 64 is activated to drive the shaft rod 66 to rotate through the coupling 65. By winding the connecting wire 681, the connecting wire 681 pulls the film rod 601 towards the shaft rod 66 direction, and the heat preservation film 60 is wound up. The hot pressing element 5 continues to move downwards to complete the hot pressing work on the LCD liquid crystal display screen below. It should be noted that the complete unfolding and complete winding of the heat preservation film 60 can be completed between the hot pressing element 5 rising or falling to the target position.

[0050] When the internal temperature of the hot pressing element 5 is too high, the gas in the central cavity 51 expands due to heat, pushing the sliding plate 71 to drive the inner frame 74 to squeeze the elastic column 73 to move upward. Then, the ventilation hole 76 and the mating hole 77 are communicated. When the sliding plate 71 drives the inner frame 74 to slide to the highest position, the ventilation hole 76 and the mating hole 77 completely coincide. The micro fan 78 is started to introduce cold air into the central cavity 51, and at the same time, the hot air is discharged through the upper row of communicated holes. The higher the internal temperature of the central cavity 51 is, the larger the channel where the ventilation hole 76 and the mating hole 77 coincide and communicate, so that the air exchange efficiency inside the central cavity 51 is faster until the hot pressing element 5 is effectively cooled. The volume of the gas in the central cavity 51 shrinks, and the sliding plate 71 drives the inner frame 74 to squeeze the elastic column 73 to move downward to the initial position, thus completing the cooling work of the hot pressing element 5.

[0051] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0052] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hot pressing device for producing LCD liquid crystal display screens, comprising a base, characterized in that: A bracket is provided on the base, a cylinder is provided above the bracket, an output end of the cylinder passes through the upper surface of the bracket and is connected to a connecting element, a hot pressing element is connected below the connecting element, and a heat preservation module and a heat dissipation module are provided inside the hot pressing element; The heat preservation module comprises a heat preservation frame, a shaft is provided on one side of the heat preservation frame, a heat preservation film is rolled up and connected on the shaft, a movable end of the heat preservation film passes through one side of the heat preservation frame and is fixedly connected to a film rod, both ends of the film rod are tied with connecting wires, the other ends of the connecting wires are rolled up and connected to a spool, and the shaft and the spool are respectively connected to a power source; The heat pressing element is provided with a central cavity, the heat dissipation module comprises a slide plate slidably connected in the central cavity, an inner frame is connected to the outer side of the slide plate, an outer frame is provided on the outer side of the inner frame, two upper and lower rows of ventilation holes are provided on the heat pressing element and the outer frame, two rows of matching holes are correspondingly provided on the inner frame directly below the ventilation holes, and a micro fan is provided in each ventilation hole in the lower row.

2. A hot pressing device for producing LCD liquid crystal display screens according to claim 1, characterized in that: A blind groove arranged in an annular manner is provided on the lower surface of the hot pressing element, and the insulation module includes a plurality of springs arranged in the blind groove, the springs are located above the insulation frame and the two are fixedly connected, the insulation frame is adapted to the blind groove, and long grooves are provided on two opposite sides of the lower surface of the insulation frame, and the connecting line passes through the long groove to connect the shaft rod and the spool on the other two opposite sides.

3. A hot pressing device for producing LCD liquid crystal display screens according to claim 2, characterized in that: One end of the shaft is connected to a coupling, and the other end of the coupling is connected to a motor. The motor serves as a power source of the shaft. The motor is fixedly connected to a motor sleeve, and the motor sleeve is fixedly mounted on the insulation frame.

4. A hot pressing device for producing LCD liquid crystal display screens according to claim 3, characterized in that: A double-shaft motor is commonly connected between the two bobbins, and the double-shaft motor serves as a power source for the bobbins. The double-shaft motor is fixedly connected to a motor frame, and the motor frame is fixedly mounted on the heat preservation frame.

5. A hot pressing device for producing LCD liquid crystal display screens according to claim 4, characterized in that: The slide plate is glued with a plurality of connecting plates around it, elastic columns are arranged above the connecting plates, the other ends of the connecting plates are glued with inner frames, the slide plate and the connecting plates are connected through the connecting plates, an outer ring cavity is opened on the hot pressing element, and the inner frame and the outer frame are both located in the outer ring cavity.

6. A hot pressing device for producing LCD liquid crystal display screens according to claim 5, characterized in that: The connecting element comprises a connecting plate, the output end of the cylinder is fixedly connected to the connecting plate, a heat insulating plate is fixedly connected below the connecting plate, and the heat insulating plate is fixedly connected below the hot pressing element.

7. A hot pressing device for producing LCD liquid crystal display screens according to claim 6, characterized in that: A heating element is arranged inside the central cavity, and an upper cover is buckled and connected to the hot pressing element.

8. A hot pressing device for producing LCD liquid crystal display screens according to claim 7, characterized in that: A fixed platform is fixedly arranged on the bracket, and a sliding plate is slidably connected inside the fixed platform. The sliding plate is a "convex" shaped structure, and the fixed platform is adapted to the shape design of the sliding plate. The relatively low rear sides of the "convex" character of the sliding plate are truncated, and the two section surfaces are fixedly connected with telescopic rods, and the other end of each telescopic rod extends backward and is fixedly connected to the inner side of the bracket.

9. A hot pressing device for producing LCD display screens according to claim 8, characterized in that: Four guiding columns are also fixedly arranged on the bracket, and the four guiding columns all pass through the four corners of the fixing platform, the connecting element and the hot pressing element in sequence upwards until reaching the upper surface of the bracket.

10. A hot pressing method using a hot pressing device for producing LCD liquid crystal display screens according to any one of claims 1 to 9, characterized in that: include: The extension of the telescopic rod pushes the sliding plate to slide outward, and the LCD screen to be hot-pressed is placed on the sliding plate, and then the retraction of the telescopic rod drives the sliding plate to slide inward to the initial position, and the cylinder is started to drive the hot-pressing element to move downward through the connecting element, and the heating element is started to heat the hot-pressing element. When the hot-pressing element moves downward, the heat-insulating frame first contacts the upper surface of the sliding plate, and the hot-pressing element continues to move downward, and the spring is compressed to make the sliding plate and the two power systems fixedly connected thereto retract into the blind groove on the lower surface of the sliding plate until the lower surface of the hot-pressing element is tightly fitted with the LCD screen to be hot-pressed, and the hot-pressing work is performed. After the hot-pressing work is completed, the cylinder drives the hot-pressing element to move upward to the initial position through the connecting element to complete the hot-pressing work; Wherein, during the process of the cylinder driving the hot pressing element to move upward, the motor is turned off, and the double-axis motor is started to drive the two spools to rotate simultaneously by winding up the connecting line, and the connecting line pulls the film rod to move in the direction of the spool, so that the thermal insulation film is unfolded and laid on the hot pressing element between the thermal insulation frames; during the process of the cylinder driving the hot pressing element to move downward, the double-axis motor is turned off, and the motor is started to drive the shaft rod to rotate through the coupling by winding up the connecting line, and the connecting line pulls the film rod to move in the direction of the shaft rod, completing the winding of the thermal insulation film, and the hot pressing element continues to move downward to complete the hot pressing work of the LCD liquid crystal display screen to be hot pressed below; When the temperature inside the hot pressing element is too high, the gas in the central cavity expands due to the heat, pushing the slide plate to drive the inner frame to squeeze the elastic column and move upward, and then the ventilation hole and the matching hole are connected. When the slide plate drives the inner frame to slide to the highest position, the ventilation hole and the matching hole completely overlap, and the micro fan is started to pass cold air into the central cavity, while hot air passes out from the upper row of connected holes. The higher the temperature inside the central cavity, the larger the channel where the ventilation hole and the matching hole overlap and connects, and the faster the ventilation efficiency inside the central cavity, until the hot pressing element is effectively cooled, the volume of the gas in the central cavity is reduced, and the slide plate drives the inner frame to squeeze the elastic column and move downward to the initial position.

Images