Pressure maintaining device

Abstract

The application belongs to the technical field of pressure maintaining, and discloses a pressure maintaining device, which comprises a carrier, a pressure maintaining module, a mounting rack and a driving mechanism. The carrier is configured to carry products. The pressure maintaining module is slidingly connected to the mounting rack along a direction that forms an acute angle with the vertical direction. The pressure maintaining module comprises a pressure head provided with a first pressure resisting part and a second pressure resisting part. The driving mechanism is configured to drive the pressure maintaining module to slide and make the first pressure resisting part and the second pressure resisting part jointly resist the pressure resisting part of the product. The first pressure resisting part can apply a first pressure to the product along the horizontal direction, and the second pressure resisting part can apply a second pressure to the product along the vertical direction, so as to simultaneously apply pressure to the horizontal part and the vertical part on the adhesive layer, thereby maintaining pressure on all parts of the adhesive layer, and ensuring that the adhesive layer can be stably bonded to the shell. The pressure maintaining device in the application can replace manual pressure maintaining work and has high work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of pressure maintaining technology, and in particular to a pressure maintaining device. Background Art

[0002] For products equipped with electronic display screens, the electronic display screens need to be assembled by bonding during the production process. Before bonding the electronic display screens, a glue layer needs to be adhered to the outer shell of the product. After bonding the glue layer to the outer shell, pressure needs to be applied to the glue layer and maintained for a preset time, so that the glue layer is firmly bonded to the outer shell, thereby ensuring that the subsequent electronic display screens can be firmly bonded to the outer shell. However, for some products, the portion on the outer shell for bonding the glue layer is stepped, but the pressure-maintaining device in the prior art can generally only apply pressure to the glue layer in one direction, and therefore cannot meet the needs of products with stepped portions for bonding the glue layer. From the above, for products with stepped portions for bonding the glue layer, the prior art generally involves manual application of pressure to the glue layer, but the efficiency of manual pressure maintenance is low. Summary of the Invention

[0003] The object of the present invention is to provide a pressure maintaining device to solve the problem of low working efficiency of manual pressure maintaining.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Pressure holding device, including:

[0006] a carrier configured to carry a product;

[0007] A pressure-maintaining module and a mounting frame, wherein the pressure-maintaining module is slidably connected to the mounting frame along a direction that is set at an acute angle to the vertical direction, and the pressure-maintaining module includes a pressure head, and the pressure head is provided with a first pressing portion and a second pressing portion; and

[0008] The driving mechanism is configured to drive the pressure-maintaining module to slide and make the first pressing part and the second pressing part jointly press against the pressure-bearing part of the product. The first pressing part can apply a first pressure to the product in a horizontal direction, and the second pressing part can apply a second pressure to the product in a vertical direction.

[0009] Preferably, the pressure-maintaining device comprises two pressure-maintaining modules, the two pressure-maintaining modules are symmetrically arranged, and the symmetry plane is a vertical plane, and the sliding tracks of the two pressure-maintaining modules are symmetrical about the symmetry plane.

[0010] Preferably, the driving mechanism is configured to drive the two pressure-maintaining dies to move synchronously.

[0011] As preferred, two first sliding rails are arranged on the mounting frame, the two first sliding rails are symmetrically arranged about the symmetry plane, two pressure maintaining modules are respectively slidably connected to the two first sliding rails, the pressure maintaining module further comprises a sliding block, the sliding block is slidably connected to the first sliding rail, the pressure head is fixedly connected with a slide rod, for the corresponding arranged pressure maintaining module and the first sliding rail, the axial direction of the slide rod is parallel to the extension direction of the first sliding rail, the slide rod is sleeved with the sliding block, the slide rod is sleeved with a spring, and the spring is connected between the sliding block and the pressure head.

[0012] As preferred, the pressure head is fixedly connected with at least two slide rods.

[0013] As preferred, one end of the slide rod away from the pressure head is provided with a limiting portion, and the limiting portion can abut against one side of the sliding block away from the pressure head.

[0014] As preferred, the sliding block comprises a first block, a second block and a third block, the first block is slidably connected to the first sliding rail, the second block is fixedly connected between the first block and the third block, the pressure head is mounted on the third block, one of the first block and the second block is provided with a first slot, the first block and the second block are fixedly connected by a first bolt penetrating through the first slot, the first slot extends along a first direction perpendicular to the extension direction of the first sliding rail, one of the second block and the third block is provided with a second slot, the second block and the third block are fixedly connected by a second bolt penetrating through the second slot, the second slot extends along a second direction perpendicular to the extension direction of the first sliding rail, and the first direction is perpendicular to the second direction.

[0015] As preferred, the driving mechanism comprises a driving member and a connecting rod, the connecting rod extends along a horizontal direction, both ends of the connecting rod are provided with rollers, the two rollers are symmetrically arranged about the symmetry plane, the sliding block is provided with sliding grooves extending along the horizontal direction, and the two rollers are respectively arranged in the two sliding grooves, and the driving member is configured to drive the connecting rod to move along a vertical direction.

[0016] As preferred, the driving mechanism further comprises a second sliding rail, the second sliding rail extends along a vertical direction, and the center line of the second sliding rail is located in the symmetry plane, and the connecting rod is slidably connected to the second sliding rail.

[0017] As preferred, the driving member is mounted on the mounting frame through a mounting plate, one of the mounting plate and the mounting frame is provided with a third slot, the mounting plate and the mounting frame are fixedly connected by a third bolt penetrating through the third slot, and the third slot extends along a vertical direction.

[0018] Advantages of the present application:

[0019] The pressure maintaining device in the present application can apply pressure to the product in horizontal direction and vertical direction, so for the product with stepped adhesive layer, the pressure maintaining device in the present application can apply pressure to the horizontal part and vertical part of the adhesive layer at the same time, so as to maintain pressure on all parts of the adhesive layer, so as to ensure that the adhesive layer can be firmly adhered to the shell. The pressure maintaining device in the present application can replace manual pressure maintaining work, and has high work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the product in the embodiment of the present application;

[0021] Figure 2 is a front view of the pressure maintaining device in the embodiment of the present application;

[0022] Figure 3 is a structural schematic diagram of the pressure maintaining device in the embodiment of the present application;

[0023] Figure 4 is one of the structural schematic diagrams of the pressure maintaining module in the embodiment of the present application;

[0024] Figure 5 is the second structural schematic diagram of the pressure maintaining module in the embodiment of the present application;

[0025] Figure 6 is an exploded view of the pressure maintaining module in the embodiment of the present application.

[0026] In the drawings:

[0027] 100, product; 110, adhesive layer; 111, horizontal pressure bearing part; 1111, horizontal pressure bearing surface; 112, vertical pressure bearing part; 1121, first vertical pressure bearing surface; 1122, second vertical pressure bearing surface; 120, shell; 121, first adhesive part; 122, second adhesive part; 1, carrier; 2, pressure maintaining module; 21, pressure head; 211, first pressure bearing part; 2111, first vertical pressure bearing surface; 2112, second vertical pressure bearing surface; 212, second pressure bearing part; 22, sliding block; 221, first block; 222, second block; 2221, first slot-shaped hole; 2222, second slot-shaped hole; 223, third block; 224, sliding groove; 23, sliding rod; 231, spring; 232, limiting part; 3, mounting frame; 31, first sliding rail; 4, driving mechanism; 41, driving piece; 42, connecting rod; 421, roller; 43, second sliding rail; 44, mounting plate; 441, third slot-shaped hole; 5, symmetry plane. DETAILED DESCRIPTION

[0028] The application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely exemplary of the application and that the application is not limited to such exemplary embodiments. It should also be understood that, in the description of the embodiments, the terms "upper", "lower", "right", "left", and the like are used only on the basis of the orientation of the figures, and are not intended to be limiting of the application. In addition, the terms "first" and "second" are used only to distinguish between two elements in the description, and do not have a special meaning.

[0029] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, "on" or "under" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the embodiments, the terms "upper", "lower", "right", "left" and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first" and "second" are only used to distinguish between two elements in the description, and do not have a special meaning.

[0032] Please refer to Figures 2 to 6 , and in combination with Figure 1The embodiment provides a pressure maintaining device, which comprises a carrier 1, a pressure maintaining module 2, a mounting frame 3 and a driving mechanism 4, the carrier 1 is configured to carry a product 100, the product 100 carried on the carrier 1 is a shell 120 with a glue layer 110, the pressure maintaining module 2 is slidingly connected to the mounting frame 3 along a direction with an included angle with the vertical direction, and the included angle is an acute angle, the pressure maintaining module 2 comprises a pressure head 21, the pressure head 21 is provided with a first pressure resisting part 211 and a second pressure resisting part 212, the driving mechanism 4 is configured to drive the pressure maintaining module 2 to slide and make the first pressure resisting part 211 and the second pressure resisting part 212 jointly resist the pressure resisting part of the product 100, wherein the first pressure resisting part 211 can apply a first pressure to the product 100 along the horizontal direction, and the second pressure resisting part 212 can apply a second pressure to the product 100 along the vertical direction.

[0033] According to the pressure maintaining device in the embodiment, the pressure can be applied to the product 100 along the horizontal direction and the vertical direction, so that the pressure maintaining device can apply the pressure to the horizontal part and the vertical part of the glue layer 110 simultaneously, thereby maintaining the pressure of all parts of the glue layer 110, and ensuring that the glue layer 110 can be firmly attached to the shell 120.

[0034] Specifically, in the embodiment, the position of the product 100 for bonding the adhesive layer 110 is in a stepped shape, and the adhesive layer 110 bonded at the position is also in a stepped shape. Specifically, the adhesive layer 110 forms a pressure bearing position composed of a horizontal pressure bearing part 111 and a vertical pressure bearing part 112. The horizontal pressure bearing part 111 forms a horizontal pressure bearing surface 1111 on the side of the adhesive layer 110 away from the shell 120. The vertical pressure bearing part 112 forms a vertical pressure bearing surface on the side of the adhesive layer 110 away from the shell 120. In the embodiment, the vertical pressure bearing surface is two, which are a first vertical pressure bearing surface 1121 and a second vertical pressure bearing surface 1122. The first vertical pressure bearing surface 1121 and the second vertical pressure bearing surface 1122 are respectively located on both sides of the horizontal pressure bearing surface 1111 in the vertical direction. The second vertical pressure bearing surface 1122 is a curved surface based on the shape of the shell 120. As described above, in the embodiment, the first pressure bearing position 211 is formed as a vertical pressure bearing surface, and the second pressure bearing position 212 is formed as a horizontal pressure bearing surface. The pressure maintaining module 2 can slide towards the product 100 in a direction that forms an angle with the vertical direction, and the horizontal pressure bearing surface 1111 and the vertical pressure bearing surface are fitted with the horizontal pressure bearing surface 1111 and the vertical pressure bearing surface. The first vertical pressure bearing surface 2111 and the second vertical pressure bearing surface 2112 are respectively fitted with the first vertical pressure bearing surface 1121 and the second vertical pressure bearing surface 1122. Thus, the first pressure bearing position 211 can apply a first pressure to the adhesive layer 110 in the horizontal direction, and the second pressure bearing position 212 can apply a second pressure to the adhesive layer 110 in the vertical direction. In this way, all parts of the adhesive layer 110 are pressure maintained to ensure that the adhesive layer 110 can be firmly bonded to the shell 120.

[0035] After the pressure maintaining is completed, the driving mechanism 4 can drive the pressure head 21 away from the product 100, thereby releasing the pressure applied to the product 100.

[0036] It can be understood that the side of the adhesive layer 110 away from the shell 120 is covered with a release film to avoid adhesion of the pressure head 21 to the adhesive layer 110. Since the way of avoiding adhesion of the pressure head 21 to the adhesive layer 110 by covering the release film is a prior art, the embodiment will not be described here.

[0037] It is worth mentioning that in the embodiment, two positions for bonding the adhesive layer 110 are provided on the product 100, which are a first bonding position 121 and a second bonding position 122, and the first bonding position 121 and the second bonding position 122 are symmetrically arranged. As such, the pressure maintaining device includes two pressure maintaining modules 2, the two pressure maintaining modules 2 are symmetrically arranged, and the symmetry plane 5 is a vertical plane. The sliding tracks of the two pressure maintaining modules 2 are symmetric about the symmetry plane 5. As such, the pressure maintaining device in the embodiment can maintain pressure for the two adhesive layers 110 respectively bonded on the first bonding position 121 and the second bonding position 122 by the two pressure maintaining modules 2, so that the two adhesive layers 110 can be stably bonded on the shell 120.

[0038] Further, in the embodiment, the driving mechanism 4 is configured to drive the two pressure maintaining modules 2 to move synchronously, so that the two pressure maintaining modules 2 can simultaneously perform the pressure maintaining operation, thereby further improving the work efficiency.

[0039] As described above, in the embodiment, the first bonding position 121 and the second bonding position 122 are oppositely arranged, that is, for the two adhesive layers 110 respectively bonded on the first bonding position 121 and the second bonding position 122, the pressure bearing positions of the two adhesive layers 110 are opposite. Correspondingly, the first pressing position 211 and the second pressing position 212 are arranged on the side of any one of the pressing heads 21 away from the other pressing head 21. Taking the two pressure maintaining modules 2 as a first pressure maintaining module 2 and a second pressure maintaining module 2, and the first pressing head 21 and the second pressing head 21 arranged in the first pressure maintaining module 2 and the second pressure maintaining module 2 as an example, the first pressing position 211 and the second pressing position 212 are arranged on the side of the first pressing head 21 away from the second pressing head 21 and on the side of the second pressing head 21 away from the first pressing head 21. The driving mechanism 4 can drive the first pressure maintaining module 2 and the second pressure maintaining module 2 to move synchronously, so as to maintain pressure for the two adhesive layers 110 respectively.

[0040] Based on the above, the mounting frame 3 is provided with two first sliding rails 31, the two first sliding rails 31 are symmetrically arranged about the symmetry plane 5 mentioned above, and the two pressure maintaining modules 2 are respectively slidably connected to the two first sliding rails 31. Based on the content mentioned above, the first sliding rail 31 extends in a direction that forms an acute angle with the vertical direction, and the acute angle is an acute angle. The pressure maintaining module 2 further includes a sliding block 22, the sliding block 22 is slidably connected to the first sliding rail 31, the driving mechanism 4 includes a driving member 41 and a connecting rod 42, the connecting rod 42 extends in a horizontal direction, both ends of the connecting rod 42 are provided with a roller 421, and the two rollers 421 are symmetrically arranged about the symmetry plane 5. The sliding block 22 is provided with a sliding groove 224 extending in the horizontal direction, and the two rollers 421 are respectively arranged in the two sliding grooves 224, that is, in this embodiment, the extension direction of the connecting rod 42 is consistent with the extension direction of the sliding groove 224, and the connecting rod 42 is arranged between the two sliding blocks 22, and both ends of the connecting rod 42 respectively extend into the two sliding grooves 224 and are movably arranged in the sliding grooves 224 through the rollers 421. The driving member 41 is configured to drive the connecting rod 42 to move in the vertical direction. When the connecting rod 42 moves in the vertical direction, the roller 421 rolls relative to the sliding block 22, thereby driving the two sliding blocks 22 to move synchronously in the extension direction of the first sliding rail 31, and further driving the two pressure heads 21 to move synchronously.

[0041] In addition, it should be further pointed out that the driving mechanism 4 further includes a second sliding rail 43, the second sliding rail 43 extends in the vertical direction, and the center line of the second sliding rail 43 is located in the symmetry plane 5, and the connecting rod 42 is slidably connected to the second sliding rail 43, thereby ensuring that the connecting rod 42 can stably move in the vertical direction.

[0042] Further, the pressure head 21 is fixedly connected with a sliding rod 23, for the corresponding pressure maintaining module 2 and the first sliding rail 31, the axial direction of the sliding rod 23 is parallel to the extension direction of the first sliding rail 31, the sliding block 22 is sleeved on the outer periphery of the sliding rod 23, the outer periphery of the sliding rod 23 is sleeved with a spring 231, and the spring 231 is connected between the sliding block 22 and the pressure head 21. After the pressure head 21 contacts the product 100, the sliding rod 23 can move relative to the sliding block 22 along its axial direction, and at the same time, the spring 231 is compressed, thereby ensuring that the pressure block and the adhesive layer 110 are in flexible contact, and further avoiding damage to the adhesive layer 110 and the shell 120.

[0043] Moreover, it is worth mentioning that, due to the inevitable errors in manufacturing and assembling of the parts of the pressure maintaining module 2, when the two pressure maintaining modules 2 move towards the product 100 simultaneously, the two pressure heads 21 are prone to the problem that one of the pressure heads 21 contacts the corresponding adhesive layer 110 first. Since the pressure head 21 in the embodiment can move relative to the sliding block 22 through the slide rod 23, and the spring 231 is arranged between the pressure head 21 and the sliding block 22, even if one of the two pressure heads 21 contacts the corresponding adhesive layer 110 first, the other pressure head 21 can also contact the corresponding adhesive layer 110 subsequently, thereby ensuring that both of the adhesive layers 110 can be maintained.

[0044] In addition, the end of the slide rod 23 away from the pressure head 21 is provided with a limiting portion 232, which can abut against the side of the sliding block 22 away from the pressure head 21, thereby preventing the pressure head 21 and the slide rod 23 from falling off the sliding block 22. Specifically, when the pressure head 21 is in a position away from the product 100, the limiting portion 232 abuts against the side of the sliding block 22 away from the pressure head 21. After the pressure head 21 contacts the adhesive layer 110, the limiting portion 232 moves along the axial direction of the slide rod 23 towards the side away from the sliding block 22, and at the same time, the spring 231 is compressed and deformed. After the pressure head 21 is separated from the product 100, the spring 231 restores the deformation, and the limiting portion 232 is reset to abut against the side of the sliding block 22 away from the pressure head 21.

[0045] Further, the pressure head 21 is fixedly connected with two slide rods 23, thereby ensuring that the pressure head 21 can move relative to the sliding block 22 more stably, and the pressure head 21 can contact and press all pressure bearing parts of the adhesive layer 110.

[0046] It can be understood that, in other alternative embodiments, the pressure head 21 can also be fixedly connected with three or more than four slide rods 23, which is not specifically limited in the embodiment.

[0047] In addition, in the embodiment, the sliding block 22 includes a first block body 221, a second block body 222 and a third block body 223. The first block body 221 is slidingly connected to the first slide rail 31. The second block body 222 is fixedly connected between the first block body 221 and the third block body 223. The pressure head 21 is installed on the third block body 223. The second block body 222 is provided with a first slot 2221. The first block body 221 and the second block body 222 are fixedly connected by a first bolt (not shown in the figure) passing through the first slot 2221. The first slot 2221 extends along a first direction perpendicular to the extension direction of the first slide rail 31. In the embodiment, the position of the second block body 222 in the first direction can be adjusted by adjusting the position of the first bolt in the first slot 2221.

[0048] Further, the second block 222 is also provided with a second strip-shaped hole 2222, the second block 222 and the third block 223 are fixedly connected through a second bolt (not shown in the figure) penetrating through the second strip-shaped hole 2222, the second strip-shaped hole 2222 extends along a second direction perpendicular to the extending direction of the first slide rail 31, the first direction is perpendicular to the second direction, and in this embodiment, the position of the third block 223 in the second direction can also be adjusted by adjusting the position of the second bolt in the second strip-shaped hole 2222.

[0049] To sum up, in this embodiment, the position of the pressure head 21 can be adjusted by adjusting the positions of the second block 222 and the third block 223, and then the influence of the manufacturing error and / or the assembly error on the relative positions of the two pressure heads 21 can be compensated, so that the two pressure heads 21 can be in contact with the product 100 at the same time as far as possible, and then the pressures applied by the two pressure heads 21 to the product 100 can be equal as far as possible.

[0050] It can be understood that in other optional embodiments, the first strip-shaped hole 2221 can also be arranged on the first block 221, and similarly, the second strip-shaped hole 2222 can also be arranged on the third block 223, and this embodiment does not make a specific limitation in this regard.

[0051] In addition, it also needs to be explained that in this embodiment, the two slide rods 23 can be used to ensure the position stability of the pressure head 21 relative to the slide block 22, and the two pressure heads 21 are at the same height, so that the two pressure heads 21 can be in contact with the product 100 at the same time as far as possible.

[0052] It is also worth mentioning that in this embodiment, the driving member 41 is an elbow clamp, and the worker can operate the elbow clamp to make the connecting rod 42 ascend and descend, so as to make the slide block 22 slide along the first slide rail 31, of course, in other optional embodiments, the driving member 41 can also be a pneumatic cylinder or an electric cylinder or other linear driving structure, and this embodiment does not make a specific limitation in this regard.

[0053] It can be understood that, in order to keep the pressure applied by the pressing head 21 to the product 100 constant during each pressing operation, the driving member 41 drives the connecting rod 42 to move at a constant stroke in the embodiment. However, when the product 100 is changed or the like, the pressure applied by the pressing head 21 to the product 100 during the pressing operation needs to be adjusted. Therefore, in the embodiment, the driving member 41 is mounted on the mounting frame 3 through the mounting plate 44. The mounting plate 44 is provided with a third slot hole 441. The mounting plate 44 and the mounting frame 3 are fixedly connected through a third bolt (not shown in the figure) penetrating through the third slot hole 441. The third slot hole 441 extends in the vertical direction. In the embodiment, the mounting position of the driving member 41 can be adjusted by adjusting the position of the third bolt in the third slot hole 441, so as to adjust the pressure applied by the pressing head 21 to the product 100 after the driving member 41 drives the connecting rod 42 to move at the fixed stroke, thereby ensuring that the adhesive layer 110 is firmly bonded to the shell 120 without damaging the adhesive layer 110 and / or the shell 120.

[0054] Compared with changing the stroke at which the driving member 41 drives the connecting rod 42 to move by dismounting the driving member 41 or changing and debugging the parameters of the driving member 41, the embodiment only needs to dismount the third bolt to adjust the pressure applied by the pressing head 21 to the product 100 during the pressing operation, and the operation is more convenient.

[0055] It can be understood that, in other optional embodiments, the third slot hole 441 can also be arranged on the mounting frame 3, and the embodiment is not specifically limited in this regard.

[0056] Obviously, the above-described embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. It is unnecessary and impossible to enumerate all the implementation modes here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. The pressure maintaining device is characterized in that: include: A carrier (1) configured to carry a product (100); A pressure-maintaining module (2) and a mounting frame (3), wherein the pressure-maintaining module (2) is slidably connected to the mounting frame (3) along a direction arranged at an angle to the vertical direction, and the angle is an acute angle, and the pressure-maintaining module (2) comprises a pressure head (21), and the pressure head (21) is provided with a first pressing portion (211) and a second pressing portion (212); and a driving mechanism (4) configured to drive the pressure-maintaining module (2) to slide, and to cause the first pressing portion (211) and the second pressing portion (212) to press together against a pressure-bearing portion of the product (100), wherein the first pressing portion (211) can apply a first pressure to the product (100) in a horizontal direction, and the second pressing portion (212) can apply a second pressure to the product (100) in a vertical direction; The pressure-maintaining device comprises two pressure-maintaining dies (2), the two pressure-maintaining dies (2) are symmetrically arranged, and the symmetry plane (5) is a vertical plane. The sliding tracks of the two pressure-maintaining dies (2) are symmetrical about the symmetry plane (5), and the driving mechanism (4) is configured to drive the two pressure-maintaining dies (2) to move synchronously. Two first slide rails (31) are provided on the mounting frame (3), and the two first slide rails (31) are symmetrically arranged about the symmetry plane (5). The two pressure-maintaining modules (2) are slidably connected to the two first slide rails (31) respectively. The pressure-maintaining module (2) also includes a slider (22), and the slider (22) is slidably connected to the first slide rail (31). The pressure head (21) is fixedly connected to a slide rod (23). For the corresponding pressure-maintaining module (2) and the first slide rail (31), the axial direction of the slide rod (23) is parallel to the extension direction of the first slide rail (31). The slider (22) is sleeved on the outer periphery of the slide rod (23), and the outer periphery of the slide rod (23) is sleeved with a spring (231), and the spring (231) is connected between the slider (22) and the pressure head (21); The driving mechanism (4) includes a driving member (41) and a connecting rod (42), wherein the connecting rod (42) extends in a horizontal direction, and rollers (421) are provided at both ends of the connecting rod (42), and the two rollers (421) are symmetrically arranged about the symmetry plane (5). The slider (22) is provided with a sliding groove (224) extending in a horizontal direction, and the two rollers (421) are respectively arranged in the two sliding grooves (224), and the driving member (41) is configured to drive the connecting rod (42) to move in a vertical direction.

2. The pressure maintaining device according to claim 1, characterized in that: The pressure head (21) is fixedly connected to at least two sliding rods (23).

3. The pressure maintaining device according to claim 2, characterized in that: A limiting portion (232) is provided at one end of the slide bar (23) away from the pressure head (21), and the limiting portion (232) can abut against a side of the slide block (22) away from the pressure head (21).

4. The pressure maintaining device according to claim 1, characterized in that: The slider (22) includes a first block (221), a second block (222) and a third block (223), wherein the first block (221) is slidably connected to the first slide rail (31), the second block (222) is fixedly connected between the first block (221) and the third block (223), the pressure head (21) is mounted on the third block (223), one of the first block (221) and the second block (222) is provided with a first strip hole (2221), and the first block (221) and the second block (222) are connected by passing through the first strip hole (2221). The first strip hole (2221) is fixedly connected with the first bolt of the strip hole (2221), and the first strip hole (2221) extends along a first direction perpendicular to the extension direction of the first slide rail (31). One of the second block (222) and the third block (223) is provided with a second strip hole (2222). The second block (222) and the third block (223) are fixedly connected by a second bolt passing through the second strip hole (2222). The second strip hole (2222) extends along a second direction perpendicular to the extension direction of the first slide rail (31), and the first direction is perpendicular to the second direction.

5. The pressure maintaining device according to claim 1, characterized in that: The driving mechanism (4) further includes a second slide rail (43), the second slide rail (43) extending in a vertical direction, and the center line of the second slide rail (43) is located in the symmetry plane (5), and the connecting rod (42) is slidably connected to the second slide rail (43).

6. The pressure maintaining device according to claim 1, characterized in that: The driving member (41) is mounted on the mounting frame (3) via a mounting plate (44); one of the mounting plate (44) and the mounting frame (3) is provided with a third strip hole (441); the mounting plate (44) and the mounting frame (3) are fixedly connected via a third bolt passing through the third strip hole (441); the third strip hole (441) extends in a vertical direction.

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