A folding die and automated folding device for a carton liner

Abstract

This invention discloses a bending mold for a packaging box liner, comprising an upper mold and a lower mold. The upper mold includes an upper static pressure block, an upper moving pressure block, and a follower pressure block. Upper moving pressure blocks are respectively arranged on both sides of the upper static pressure block along a first axial direction. The follower pressure block is arranged on one side of the upper moving pressure block and is connected to the upper moving pressure block, slidingly engaging in the vertical direction. The lower mold includes a lower static pressure block and a lower moving pressure block. Lower moving pressure blocks are respectively arranged on both sides of the lower static pressure block along the first axial direction. The upper and lower moving pressure blocks move synchronously. The bottom surface of the upper static pressure block and the top surface of the lower static pressure block, as well as the bottom surface of the upper moving pressure block and the top surface of the lower moving pressure block, engage vertically to clamp the packaging box liner. The side surface of the upper static pressure block and the inner side surface of the lower moving pressure block, as well as the outer side surface of the follower pressure block and the lower moving pressure block, engage to bend the packaging box liner. The first axial direction is perpendicular to the vertical direction. This invention also discloses an automated bending device with this bending mold. This invention can achieve multi-point synchronous bending of cardboard liners, improving efficiency.

Description

Technical Field

[0001] This invention relates to a bending die and an automated device, and more particularly to a bending die and an automated bending device for a packaging box liner. Background Technology

[0002] Packaging boxes typically have an inner liner, which serves two purposes: firstly, creates a cushioning area to protect the product, and secondly, divides the interior space of the box into multiple sections for individual product placement. The main structural forms of existing packaging box liners include M-shaped, MW-shaped, and MWM-shaped liners, such as... Figure 1 As shown, the M-shape is formed by multiple consecutive bends in one direction of the cardstock, such as... Figure 2 As shown, the MW shape is formed by bending the cardstock in two perpendicular directions to create two M-shapes. For example... Figure 3 As shown, MWM is a connection formed by bending two M-shapes in the cardboard in another vertical direction.

[0003] Traditionally, bending processes were primarily done manually, which was inefficient and required pre-marking creases on the cardboard; otherwise, manual bending resulted in significant tolerances and high costs. While automated bending equipment typically involves multiple folds based on the crease lines, ensuring sufficient bending accuracy, the number of bending steps increases with the complexity of the lining, hindering efficiency. Furthermore, if a single-step forming process using corresponding embossed molds based on the lining structure is implemented, pre-marking creases on the cardboard is still necessary; otherwise, the cardboard's elasticity makes accurate pressing difficult in one pass. Summary of the Invention

[0004] To address the shortcomings of the prior art, this invention provides a bending mold for packaging box liners, solving the problem of difficulty in bending the liners in one step. This invention also provides an automated bending device for packaging box liners, improving the efficiency of liner bending production.

[0005] The technical solution of this invention is as follows:

[0006] A bending mold for a packaging box liner includes an upper mold and a lower mold. The upper mold includes an upper static pressure block, an upper moving pressure block, and a follower pressure block. The upper moving pressure block is disposed on both sides of the upper static pressure block along a first axial direction. The follower pressure block is disposed on the side of the upper moving pressure block away from the upper static pressure block. The follower pressure block is connected to the upper moving pressure block and slides in a vertical direction. The lower mold includes a lower static pressure block and a lower moving pressure block. The lower moving pressure block is disposed on both sides of the lower static pressure block along a first axial direction. The upper moving pressure block and the lower moving pressure block move synchronously. The bottom surface of the upper static pressure block and the top surface of the lower static pressure block, as well as the bottom surface of the upper moving pressure block and the top surface of the lower moving pressure block, cooperate vertically to clamp the packaging box liner. The side surface of the upper static pressure block and the inner side surface of the lower moving pressure block, as well as the outer side surface of the follower pressure block and the lower moving pressure block, cooperate to bend the packaging box liner. The first axial direction is perpendicular to the vertical direction.

[0007] Furthermore, in order to reduce the configuration of driving components and simplify driving control, the upper moving pressure block and the upper stationary pressure block are connected by an upper parallel connecting rod, and the lower moving pressure block and the lower stationary pressure block are connected by a lower parallel connecting rod. The lower mold is provided with a lower telescopic mechanism that drives the lower moving pressure block to move closer to or away from the lower stationary pressure block.

[0008] Furthermore, the upper mold is provided with an upper telescopic mechanism that drives the upper moving pressure block to move closer to or away from the upper static pressure block.

[0009] Furthermore, the upper mold includes a guide rail, which is fixedly connected to the upper static pressure block and extends along a first axial direction, and the follower pressure block slides with the guide rail along the first axial direction.

[0010] Furthermore, the bottom edge of the follower block near the upper moving block is chamfered.

[0011] Another technical solution of the present invention is as follows:

[0012] A bending mold for a packaging box liner includes a first mold, a second mold, and a connecting module. The first mold includes an upper mold and a lower mold. The upper mold includes an upper static pressure block, an upper moving pressure block, and a follower pressure block. The upper moving pressure block is respectively arranged on both sides of the upper static pressure block along a first axial direction. The follower pressure block is arranged on the side of the upper moving pressure block away from the upper static pressure block and is connected to the upper moving pressure block and slides in the vertical direction. The lower mold includes a lower static pressure block and a lower moving pressure block. The lower moving pressure block is respectively arranged on both sides of the lower static pressure block along a first axial direction. The upper moving pressure block and the lower moving pressure block... Synchronous movement: the bottom surface of the upper static pressure block and the top surface of the lower static pressure block, the bottom surface of the upper moving pressure block and the top surface of the lower moving pressure block cooperate to clamp the inner lining of the packaging box; the side surface of the upper static pressure block and the inner side surface of the lower moving pressure block, and the outer side surface of the follower pressure block cooperate to bend the inner lining of the packaging box; the first axis is perpendicular to the vertical direction; the second mold is disposed to the side of the first mold along the second axis; the second mold includes a secondary upper mold and a secondary lower mold; the secondary upper mold includes a secondary upper static pressure block, a secondary upper moving pressure block and a secondary follower pressure block; the secondary upper static pressure block... The auxiliary upper moving pressure block is disposed on the side of the auxiliary upper moving pressure block away from the first mold along the second axis. The auxiliary follower pressure block is disposed on the side of the auxiliary upper moving pressure block away from the auxiliary upper stationary pressure block. The auxiliary follower pressure block is connected to the auxiliary upper moving pressure block and slides in the vertical direction. The auxiliary lower mold includes an auxiliary lower stationary pressure block and an auxiliary lower moving pressure block. The auxiliary lower moving pressure block is disposed on the side of the auxiliary lower stationary pressure block away from the first mold along the second axis. The auxiliary upper moving pressure block and the auxiliary lower moving pressure block move synchronously. The bottom surface of the auxiliary upper stationary pressure block and the top surface of the auxiliary lower stationary pressure block, and the bottom surface of the auxiliary upper moving pressure block and the top surface of the auxiliary lower moving pressure block are connected. The upper and lower surfaces cooperate to clamp the inner lining of the packaging box. The side of the secondary upper static pressure block and the inner side of the secondary lower moving pressure block, as well as the outer side of the secondary follower pressure block and the secondary lower moving pressure block, cooperate to bend the inner lining of the packaging box. The connecting module is connected between the lower static pressure block and the secondary lower static pressure block. When the connecting module is lifted, it moves along the second axis and pulls the second mold to move along the second axis. The two sides of the connecting module cooperate with the upper static pressure block and the secondary upper static pressure block respectively to bend the inner lining of the packaging box. The second axis is perpendicular to the first axis and the vertical direction.

[0013] Furthermore, the bending die includes a telescopic drive mechanism for lifting the connecting module. The upper die includes a first guide rail, which is fixedly connected to the upper static pressure block and extends along a first axial direction. The follower pressure block is slidably engaged with the guide rail along the first axial direction. The upper static pressure block is fixedly connected to a second guide rail extending along a second axial direction. The lower static pressure block is fixedly connected to a third guide rail extending along the second axial direction. The auxiliary upper static pressure block and the auxiliary follower pressure block are slidably engaged with the second guide rail. The auxiliary lower static pressure block and the telescopic drive mechanism are slidably engaged with the third guide rail.

[0014] Another technical solution of the present invention is as follows: A bending mold for a packaging box liner includes a first mold, a second mold, and a connecting module. The first mold and the second mold have the same structure. The first mold includes an upper mold and a lower mold. The upper mold includes an upper static pressure block, an upper moving pressure block, and a follower pressure block. The upper moving pressure block is respectively arranged on both sides of the upper static pressure block along a first axial direction. The follower pressure block is arranged on the side of the upper moving pressure block away from the upper static pressure block. The follower pressure block is connected to the upper moving pressure block and slides in the vertical direction. The lower mold includes a lower static pressure block and a lower moving pressure block. The lower moving pressure block is respectively arranged on both sides of the lower static pressure block along a first axial direction. The upper moving pressure block and the lower moving pressure block move synchronously. The bottom surface of the upper static pressure block and the top surface of the lower static pressure block, and the upper moving pressure block... The bottom surface of the moving pressure block and the top surface of the lower moving pressure block cooperate to clamp the inner lining of the packaging box. The side surface of the upper static pressure block and the inner surface of the lower moving pressure block, as well as the outer surface of the following pressure block and the lower moving pressure block, cooperate to bend the inner lining of the packaging box. The first axis is perpendicular to the vertical direction. The second mold is disposed on the side of the first mold along the second axis. The connecting module is connected between the lower static pressure block of the first mold and the second mold. When the connecting module is lifted, it moves along the second axis and pulls the second mold to move along the second axis. The two sides of the connecting module cooperate with the upper static pressure block of the first mold and the second mold respectively to bend the inner lining of the packaging box. The second axis is perpendicular to the first axis and the vertical direction.

[0015] Furthermore, the upper static pressure block of the first mold is fixedly connected to a first guide rail extending along the second axis, the lower static pressure block of the first mold is fixedly connected to a second guide rail extending along the second axis, the upper static pressure block of the second mold is slidably engaged with the first guide rail, and the lower static pressure block of the second mold is slidably engaged with the second guide rail.

[0016] An automated bending device for packaging box liners includes a base, on which a linear module, a material preparation platform, and the aforementioned bending mold for the packaging box liner are mounted. The lower mold of the bending mold is installed on the base. A lifting mechanism is provided on the linear module, and the lifting mechanism is connected to a crossbeam. The crossbeam is fixed to the upper mold of the bending mold. Liner suction heads are provided on both sides of the upper mold on the crossbeam. The liner suction heads are used to suction the packaging box liner from the material preparation platform to the lower mold of the bending mold and to suction and demold it from the lower mold of the bending mold.

[0017] The advantages of the technical solution provided by this invention are as follows:

[0018] This invention utilizes the cooperation of upper and lower static pressure blocks, as well as upper and lower moving pressure blocks, to clamp the cardboard liner at multiple points. Then, the movement of the upper and lower moving pressure blocks, and the movement of the follower pressure blocks driven by their movement, synchronously completes the bending at each position. This solves the problems of multiple bends in cardboard liner bending, where each bend involves positioning and clamping, leading to spatial interference and difficulty in maintaining the shape after all bends for the next boxing process. This invention achieves single-step positioning and clamping, synchronous bending, and interference-free structure, facilitating shape maintenance and smooth boxing, thus improving production efficiency compared to gradual bending. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the inner lining of the M-shaped packaging box.

[0020] Figure 2 This is a schematic diagram of the inner lining of the MW-shaped packaging box.

[0021] Figure 3 This is a schematic diagram of the inner lining of the MWM-shaped packaging box.

[0022] Figure 4 This is a schematic diagram of the automated bending device for the inner lining of the packaging box in Example 1.

[0023] Figure 5 This is a schematic diagram of the bending mold for the inner lining of the packaging box in Example 1.

[0024] Figure 6 This is a schematic diagram of the structural principle of the bending mold for the inner lining of the packaging box in Example 1 before bending.

[0025] Figure 7 This is a schematic diagram of the structural principle of the inner lining of the packaging box in Example 1 after bending using a bending mold.

[0026] Figure 8 This is a schematic diagram of the bending mold for the inner lining of the packaging box in Example 2.

[0027] Figure 9 This is a schematic diagram of the bending mold for the inner lining of the packaging box in Example 3. Detailed Implementation

[0028] The present invention will be further described below with reference to embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading this description, any modifications of this description in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0029] Example 1, as Figure 4 As shown, the automated bending device for packaging box liners involved in this embodiment includes a base, on which a linear module 2, a preparation platform 3, a pre-bending mold 4, and a bending mold 5 for the packaging box liner are respectively mounted. The preparation platform 3, the pre-bending mold 4, and the bending mold 5 for the packaging box liner are arranged at intervals, and their arrangement direction is parallel to the moving direction of the linear module 2. The preparation platform 3 mainly includes a floating platform 31, which is guided by guide posts 32. A spring 33 is installed between the platform 31 and the base. The cardboard liner to be folded is stacked on the platform 31. As the cardboard is gradually sucked up, the platform 31 gradually rises, which can basically maintain the stability of the cardboard plane. The pre-bending mold 4 is set as needed, and its main purpose is to pre-bend the ears on the side of the cardboard. The pre-bending mold 4 can be set according to the required bending form of the cardboard liner. It should be noted that the pre-bending mold 4 is unrelated to the forming of the main shape (M, MW, MWM) inside the cardboard, so the pre-bending mold 4 can be omitted.

[0030] The linear module 2 is mounted on the base, located on one side of the material preparation platform 3, the pre-bending mold 4, and the bending mold for the packaging box liner. A lifting mechanism 6 is mainly installed on the linear module 2. The movement of the linear module 2 can move the lifting mechanism 6 along the arrangement direction of the material preparation platform 3, the pre-bending mold 4, and the bending mold for the packaging box liner 5. A crossbeam 7 is fixed on the lifting mechanism 6, and the movement of the lifting mechanism 6 causes the crossbeam 7 to move up and down. Three liner suction heads 8 are fixedly installed on the crossbeam 7. The spacing between the liner suction heads 8 is the same as the spacing between the material preparation platform 3, the pre-bending mold 4, and the bending mold for the packaging box liner 5. Similarly, the spacing between the material preparation platform 3 and the pre-bending mold 4, and between the pre-bending mold 4 and the bending mold for the packaging box liner 5, is also the same. The three lining suction heads 8 correspond to the preparation platform 3, the pre-bending mold 4, and the packaging box lining bending mold 5, respectively. After picking up the cardboard lining from the preparation platform 3, the pre-bending mold 4, and the packaging box lining bending mold 5, the cardboard lining is lifted by the lifting mechanism 6 and then moved by the linear module 2. This moves the cardboard lining from the preparation platform 3 to the pre-bending mold 4 for pre-bending. The bent cardboard lining on the pre-bending mold 4 is then moved to the packaging box lining bending mold 5 for main bending. The crossbeam 7 is also fixed to the upper part of the pre-bending mold 4 and the upper mold of the packaging box lining bending mold 5. When the crossbeam 7 is lifted, it opens the pre-bending mold 4 and the packaging box lining bending mold 5.

[0031] The following section details the bending mold for the inner lining of the packaging box. Please refer to... Figure 1 and Figure 5As shown, the bending mold for the inner lining of the packaging box in this embodiment is used to bend and form an M-shaped cardboard inner lining. The bending mold includes an upper mold 100 and a lower mold 200. The upper mold 100 includes an upper static pressure block 101, an upper moving pressure block 102, and a follower pressure block 103. The upper static pressure block 101 is located in the middle, and an upper moving pressure block 102 is connected to each of the left and right sides of the upper static pressure block 101 (the left and right direction is the first axial direction X). The upper moving pressure block 102 and the upper static pressure block 101 are connected by an upper parallel connecting rod 104. At the same time, an upper telescopic mechanism 105 is connected between the upper moving pressure block 102 and the upper static pressure block 101, and the upper telescopic mechanism 105 is used to lift the upper moving pressure block 102 upward. When the upper moving pressure block 102 is lifted, under the action of the upper parallel connecting rod 104, the upper moving pressure block 102 actually translates along an arc path, moving from a position away from the upper static pressure block 101 to a position close to the upper static pressure block 101. The follower pressure block 103 is located on the side of the upper moving pressure block 102 away from the upper static pressure block 101, and the follower pressure block 103 slides with the upper moving pressure block 102 in the vertical direction. Specifically, a dovetail guide groove is provided on the side of the upper moving pressure block 102 away from the upper static pressure block 101, and a dovetail guide bar is provided on the follower pressure block 103, which slides through the cooperation of the dovetail guide groove and the dovetail guide bar. At the same time, a guide rail 106 extending to the left and right sides (first axis X) is fixed on the upper static pressure block 101. The function of the guide rail 106 is to limit the movement direction of the follower pressure block 103. The top of the follower pressure block 103 slides along the guide rail 106, allowing it to move along the rail. Thus, when the upper pressure block 102 moves along an arc path, it pulls the follower pressure block 103 towards the upper stationary pressure block 101, while maintaining a constant height. Furthermore, the bottom edge of the follower pressure block 103 near the upper pressure block 102 is chamfered to facilitate bending the outermost edge of the cardboard liner and prevent shearing. Additionally, an airflow channel can be provided within the upper stationary pressure block 101, forming an inlet and outlet on its bottom surface. During bending with the upper die 100 and lower die 200, negative pressure suction in the airflow channel ensures the stability of the cardboard liner's position. After bending, when the upper die 100 is removed, positive pressure blowing in the airflow channel allows the cardboard liner to quickly detach from the upper die 100.

[0032] The lower mold 200 includes a lower static pressure block 201 and a lower moving pressure block 202, similar in structure to the upper static pressure block 101 and the upper moving pressure block 102. The upper static pressure block 101 is located in the middle, and a lower moving pressure block 202 is connected to each of the left and right sides of the lower static pressure block 201 (the left and right direction is the first axial direction X). The lower moving pressure block 202 and the lower static pressure block 201 are connected by a lower parallel connecting rod 203. At the same time, a lower telescopic mechanism 204 is connected between the lower moving pressure block 202 and the lower static pressure block 201 (it is set in the grooves on both sides of the lower moving pressure block 202; its position is only marked by dashed lines in the figure, see reference). Figure 8At point A, the lower moving pressure block 202 is lifted upwards using the lower telescopic mechanism 204. When lifting the lower moving pressure block 202, under the action of the lower parallel connecting rod 203, the lower moving pressure block 202 actually moves along an arc path, from a position far from the lower static pressure block 201 to a position close to the lower static pressure block 201. Additionally, an airflow channel can be provided inside the lower static pressure block 201, forming an inlet and outlet on its top surface. When the upper mold 100 and lower mold 200 cooperate to bend, the negative pressure suction of the airflow channel in the lower static pressure block 201 ensures the stability of the cardboard liner's position. After bending, when the upper mold 100 is removed, the continuous negative pressure blowing of the airflow channel in the lower static pressure block 201 allows the cardboard liner to quickly detach from the upper mold 100 and remain on the lower mold 200, facilitating the next process.

[0033] The upper mold 100 and the lower mold 200 are connected as follows: the crossbeam 7 on the linear module 2 is fixedly connected to the upper static pressure block 101 of the upper mold 100. As the linear module 2 moves, the upper mold 100 and the lower mold 200 are positioned relative to each other. Here, "positional relative" means that the upper static pressure block 101 and the lower static pressure block 201 are vertically aligned. Then, the lifting mechanism 6 drives the crossbeam 7 to descend, causing the bottom surface of the upper static pressure block 101 and the top surface of the lower static pressure block 201 to fit together (the previously flat cardboard liner is located on the lower static pressure block 201). At this time, the follower pressure block 103, the upper moving pressure block 102, and the bottom surface of the upper static pressure block 101 are on the same plane, located on the upper surface of the cardboard liner. The lower moving pressure block 202 and the top surface of the lower static pressure block 201 are on the same plane, located on the lower surface of the cardboard liner. The bottom surface of the upper static pressure block 101 and the top surface of the lower static pressure block 201 have the same size and shape, and the bottom surface of the upper moving pressure block 102 and the top surface of the lower moving pressure block 202 also have the same size and shape. Thus, the cardboard inner liner is clamped at three points at intervals. Figure 6 Schematic diagram. Subsequently, driven by the upper telescopic mechanism 105 and the lower telescopic mechanism 204, the upper moving pressure block 102 and the lower moving pressure block 202 synchronously move towards the center. The portion clamped by the upper moving pressure block 102 and the lower moving pressure block 202 moves upward relative to the portion clamped by the upper static pressure block 101 and the lower static pressure block 201. This allows for further bending by utilizing the side of the upper static pressure block 101 and the inner side of the lower moving pressure block 202 (facing the lower static pressure block 201), and the outer side of the follower pressure block 103 and the lower moving pressure block 202 (facing away from the lower static pressure block 201). At this time, as shown... Figure 7 Indication.

[0034] Example 2, please refer to Figure 2 and Figure 8As shown, the bending mold for the packaging box liner in this embodiment includes a first mold 300, a second mold 400, and a connecting module 500. The first mold 300 has the same structure as the bending mold for the packaging box liner in Embodiment 1, and will not be described again. The second mold 400 is essentially half of the first mold 300. A second axis Y is defined, which is perpendicular to the first axis X and the vertical direction. The second mold 400 is located on the side of the upper static pressure block 301 and the lower static pressure block 302 in the first mold 300 along the second axis Y. The left-right direction of the second mold 400 is the second axis Y. In the first mold 300, the upper static pressure block 301 has a first guide rail 303 extending along the first axis X, and is also fixedly connected to a second guide rail 304 extending along the second axis Y. The lower static pressure block 302 is fixedly connected to a third guide rail 305 extending along the second axis Y.

[0035] The second mold 400 includes an upper auxiliary mold and a lower auxiliary mold. The upper auxiliary mold includes an upper auxiliary static pressure block 401, an upper auxiliary dynamic pressure block 402, and a follower pressure block 403. An upper auxiliary dynamic pressure block 402 is connected to the right side (i.e., the second axial side) of the upper auxiliary static pressure block 401. The upper auxiliary dynamic pressure block 402 and the upper auxiliary static pressure block 401 are connected by an upper auxiliary parallel connecting rod 404. An upper auxiliary telescopic mechanism 405 is connected between the upper auxiliary dynamic pressure block 402 and the upper auxiliary static pressure block 401. The upper auxiliary telescopic mechanism 405 is used to lift the upper auxiliary dynamic pressure block 402 upward. When the upper auxiliary dynamic pressure block 402 is lifted, under the action of the upper auxiliary parallel connecting rod 404, the upper auxiliary dynamic pressure block 402 actually translates along an arc path, moving from a position away from the upper auxiliary static pressure block 401 to a position close to the upper auxiliary static pressure block 401. The auxiliary follower pressure block 403 is located on the side of the auxiliary upper moving pressure block 402 away from the auxiliary upper stationary pressure block 401, and the auxiliary follower pressure block 403 slides in conjunction with the auxiliary upper moving pressure block 402 in the vertical direction. Specifically, a dovetail guide groove is formed on the side of the upper moving pressure block away from the auxiliary upper stationary pressure block 401, and a dovetail guide bar is formed on the auxiliary follower pressure block 403. Sliding is achieved through the cooperation of the dovetail guide groove and the dovetail guide bar. Unlike the fixed upper stationary pressure block in the first mold, the top of the auxiliary upper stationary pressure block 401 slides in conjunction with the second guide rail, and the top of the auxiliary follower pressure block 403 also slides in conjunction with the second guide rail 304, allowing the auxiliary follower pressure block 403 to move along the guide rail. Thus, when the auxiliary upper moving pressure block 402 moves along an arc path, the auxiliary upper moving pressure block 402 will drive the auxiliary follower pressure block 403 to move closer to the auxiliary upper stationary pressure block 401, while the auxiliary follower pressure block 403 remains unchanged in height. In addition, the bottom edge of the auxiliary follower pressure block 403 near the auxiliary upper pressure block 402 is chamfered to facilitate bending the outermost side of the cardboard liner and avoid shearing.

[0036] The secondary lower mold includes a secondary lower static pressure block 406 and a secondary lower dynamic pressure block 407, similar in structure to the secondary upper static pressure block 401 and secondary upper dynamic pressure block 402. A secondary lower dynamic pressure block 407 is connected to the right side of the secondary lower static pressure block 406, and the secondary lower dynamic pressure block 407 and the secondary lower static pressure block 406 are connected by a secondary lower parallel connecting rod 408. Simultaneously, a secondary lower telescopic mechanism 409 (located in the slots on both sides of the secondary lower dynamic pressure block 406, its position is only indicated by dashed lines in the figure) is connected between the secondary lower dynamic pressure block 407 and the secondary lower static pressure block 406. The secondary lower telescopic mechanism 409 is used to lift the secondary lower dynamic pressure block 407 upwards. When lifting the secondary lower dynamic pressure block 407, under the action of the secondary lower parallel connecting rod 408, the secondary lower dynamic pressure block 407 actually translates along an arc path, moving from a position away from the secondary lower static pressure block 406 to a position close to the secondary lower static pressure block 406. Unlike the fixed lower static pressure block 301 in the first mold 300, the bottom of the secondary lower static pressure block 406 is in sliding engagement with the third guide rail 305.

[0037] The connecting module 500 is connected between the lower static pressure block 302 of the first mold 300 and the secondary lower static pressure block 406 of the second mold 400, with the connection direction along the second axis Y, and is connected by a parallel connecting rod structure 501. A telescopic drive mechanism 502 is slidably engaged on the third guide rail 304, and the telescopic drive mechanism 502 is used to lift the connecting module 500.

[0038] The bending principle of the packaging box lining bending mold in this embodiment is similar to that in Embodiment 1. The first mold 300 completes the bending of one M-shaped structure, and the second mold 400 completes the bending of half of another M-shaped structure. The two M-shapes are arranged perpendicularly to each other. When the telescopic drive mechanism 502 drives the connecting module 500 to rise, the parallel connecting rod structure 501 connected to the connecting module 500 pulls the second mold 400 toward the first mold 300. The two sides of the connecting module 500 cooperate with the upper static pressure block 301 of the first mold 300 and the secondary upper static pressure block 401 of the second mold 400 to complete the final bending. (The process is similar to the bending of the lower moving pressure block and the upper static pressure block in the first mold 300.)

[0039] Example 3, please refer to Figure 3 and Figure 9As shown, the bending mold for the packaging box liner in this embodiment includes a first mold 600, a second mold 700, and a connecting module 800. The first mold 600 and the second mold 700 have the same structure as the bending mold for the packaging box liner in Embodiment 1, and will not be described again. In the first mold 600, the upper static pressure block 601 has a guide rail 602 extending along the first axial direction X, and is also fixedly connected to a first guide rail 603 extending along the second axial direction Y. The lower static pressure block 604 is fixedly connected to a second guide rail 605 extending along the second axial direction Y. The second axial direction Y is perpendicular to the first axial direction X and the vertical direction. The upper static pressure block 701 of the second mold 700 slides in engagement with the first guide rail 603 along the second axial direction Y, and the lower static pressure block 702 of the second mold 700 slides in engagement with the second guide rail 604 along the second axial direction Y.

[0040] In this embodiment, the connecting module 800 includes an upper connecting module 801 and a lower connecting module 802, which are correspondingly arranged. The bottom surface of the upper connecting module 801 and the top surface of the lower connecting module 802 are the same in size and shape. The upper connecting module 801 is connected to the upper static pressure blocks 601 and 701 of the first mold 600 and the second mold 700 in the second axis Y by a parallel connecting rod 803. A telescopic connection is provided between the upper connecting module 801 and the upper static pressure blocks 601 and 701. The drive structure is used to drive the upper connecting module to move (similar to the upper telescopic mechanism connecting the upper static pressure block and the upper dynamic pressure block in the first mold 700); the lower connecting module 802 is connected to the lower static pressure blocks 604 and 702 of the first mold 600 and the second mold 700 in the second axis Y by a parallel connecting rod 804, and a telescopic drive structure is provided between the lower connecting module 802 and the lower static pressure blocks 604 and 702 to drive the lower connecting module to move (similar to the lower telescopic mechanism connecting the lower static pressure block and the lower dynamic pressure block in the first mold).

[0041] The bending principle of the bending mold for the inner lining of the packaging box in this embodiment is similar to that in embodiment 1. The first mold 600 and the second mold 700 respectively complete the bending of an M-shaped structure. The two M-shapes are set parallel to each other. When the telescopic drive mechanism drives the connecting module 800 to move, the parallel connecting rods 803 and 804 connected to the connecting module 800 pull the second mold 700 toward the first mold 600. The two sides of the lower connecting module 802 in the connecting module 800 cooperate with the upper static pressure block 601 of the first mold 600 and the upper static pressure block 701 of the second mold 700 to complete the final bending.

Claims

1. A folding die for a carton inner liner, characterized by, The upper die comprises an upper static pressure block, upper dynamic pressure blocks and a follow-up pressure block, the upper static pressure block is provided with the upper dynamic pressure blocks on both sides along a first axial direction, the follow-up pressure block is provided on a side of the upper dynamic pressure block away from the upper static pressure block, the follow-up pressure block is connected with the upper dynamic pressure block and is in sliding fit in the up-down direction, the lower die comprises a lower static pressure block and lower dynamic pressure blocks, the lower static pressure block is provided with the lower dynamic pressure blocks on both sides along the first axial direction, the upper dynamic pressure blocks and the lower dynamic pressure blocks move synchronously, the bottom surface of the upper static pressure block and the top surface of the lower static pressure block, the bottom surface of the upper dynamic pressure block and the top surface of the lower dynamic pressure block are in up-down fit for clamping a packaging box lining, the side surface of the upper static pressure block and the inner side surface of the lower dynamic pressure block, the follow-up pressure block and the outer side surface of the lower dynamic pressure block are in fit for bending the packaging box lining, and the first axial direction is perpendicular to the up-down direction.

2. The folding die for a carton liner of claim 1, wherein, The upper dynamic pressure blocks and the upper static pressure block are connected through upper parallel connecting rods, the lower dynamic pressure blocks and the lower static pressure block are connected through lower parallel connecting rods, and the lower die is provided with a lower telescopic mechanism for driving the lower dynamic pressure blocks to approach or move away from the lower static pressure block.

3. The folding die for a carton liner of claim 2, wherein, The upper die is provided with an upper telescopic mechanism for driving the upper dynamic pressure blocks to approach or move away from the upper static pressure block.

4. The folding die for a carton liner of claim 1, wherein, The upper die comprises a guide rail, the guide rail is fixedly connected with the upper static pressure block and extends along the first axial direction, and the follow-up pressure block is in sliding fit with the guide rail in the first axial direction.

5. The folding die for a carton liner of claim 1, wherein, The lower bottom of the side of the follow-up pressure block close to the upper dynamic pressure block is provided as a chamfer.

6. A folding die for a carton inner liner, characterized by, The bending mold comprises a telescopic driving mechanism for lifting the connecting module, the upper mold comprises a first guide rail fixedly connected with the upper static pressure block and extending along the first axial direction, the follow-up pressure block is in sliding fit with the guide rail along the first axial direction, the upper static pressure block is fixedly connected with a second guide rail extending along the second axial direction, the lower static pressure block is fixedly connected with a third guide rail extending along the second axial direction, the vice upper static pressure block and the vice follow-up pressure block are in sliding fit with the second guide rail, and the vice lower static pressure block and the telescopic driving mechanism are in sliding fit with the third guide rail.

7. The folding die for a carton liner of claim 6, wherein, The bending mold comprises a telescopic driving mechanism for lifting the connecting module, the upper mold comprises a first guide rail fixedly connected with the upper static pressure block and extending along the first axial direction, the follow-up pressure block is in sliding fit with the guide rail along the first axial direction, the upper static pressure block is fixedly connected with a second guide rail extending along the second axial direction, the lower static pressure block is fixedly connected with a third guide rail extending along the second axial direction, the vice upper static pressure block and the vice follow-up pressure block are in sliding fit with the second guide rail, and the vice lower static pressure block and the telescopic driving mechanism are in sliding fit with the third guide rail.

8. A folding die for a carton inner liner, characterized by, The device comprises a first mold, a second mold and a connecting module, the first mold and the second mold are structurally identical, the first mold comprises an upper mold and a lower mold, the upper mold comprises an upper static pressure block, an upper dynamic pressure block and a follow-up pressure block, the upper dynamic pressure block is arranged on both sides of the upper static pressure block along a first axial direction, the follow-up pressure block is arranged on the side of the upper dynamic pressure block away from the upper static pressure block, the follow-up pressure block is connected with the upper dynamic pressure block and slides in the up-down direction, the lower mold comprises a lower static pressure block and a lower dynamic pressure block, the lower dynamic pressure block is arranged on both sides of the lower static pressure block along the first axial direction, the upper dynamic pressure block and the lower dynamic pressure block move synchronously, the bottom surface of the upper static pressure block and the top surface of the lower static pressure block, the bottom surface of the upper dynamic pressure block and the top surface of the lower dynamic pressure block are matched in the up-down direction for clamping the inner liner of the packaging box, the side surface of the upper static pressure block and the inner side surface of the lower dynamic pressure block, the follow-up pressure block and the outer side surface of the lower dynamic pressure block are matched for bending the inner liner of the packaging box, and the first axial direction is perpendicular to the up-down direction; the second mold is arranged on the side of the first mold along a second axial direction, the connecting module is connected between the lower static pressure blocks of the first mold and the second mold, the connecting module is lifted to move along the second axial direction and pull the second mold to move along the second axial direction, and the two sides of the connecting module are matched with the upper static pressure blocks of the first mold and the second mold for bending the inner liner of the packaging box, and the second axial direction is perpendicular to the first axial direction and the up-down direction.

9. The folding die for a carton liner of claim 8, wherein, The upper static pressure block of the first mold is fixedly connected with a first guide rail extending along the second axial direction, the lower static pressure block of the first mold is fixedly connected with a second guide rail extending along the second axial direction, the upper static pressure block of the second mold is slidably matched with the first guide rail, and the lower static pressure block of the second mold is slidably matched with the second guide rail.

10. An automatic bending device for an inner liner of a packaging box, comprising a base, a linear module, a preparation table and a bending mold for the inner liner of the packaging box according to claim 1, 6 or 8 are arranged on the base, the lower mold of the bending mold is installed on the base, a lifting mechanism is arranged on the linear module, a cross beam is connected to the lifting mechanism, the cross beam is fixed with the upper mold of the bending mold, inner liner suction heads are arranged on both sides of the upper mold of the cross beam, the inner liner suction heads are used to suction the inner liner of the packaging box from the preparation table to the lower mold of the bending mold and to suction and demold from the lower mold of the bending mold.

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