Pre-folding supporting mechanism

Abstract

The utility model relates to the field of box body pre-folding and covering machine structures, and discloses a pre-folding supporting mechanism which comprises a top die box supporting mechanism and a pre-folding mechanism, the top die box supporting mechanism comprises a box supporting air cylinder and a box supporting piece, and the box supporting piece is connected to the output end of the box supporting air cylinder; the number of the pre-folding mechanisms is two, the two pre-folding mechanisms are located on the two sides of the mold ejecting and box supporting mechanism respectively, each pre-folding mechanism comprises an edge folding component, a driving component and two scraper knife components, the scraper knife components are located on the two sides of the edge folding component respectively, in the working state, the box supporting component abuts against the inner side of the long edge of a box body, and the edge folding component is located on the outer side of the long edge of the box body. The driving component drives the edge folding component to bend the short edges of the box body and drives the scraper knife component to flatten the four corners of the box body. The box has the advantages that the two box supporting pieces are arranged to exert outward expanding force on the long edges of the box body, interference between the short edges of the box body and the inner sides of the long edges of the box body is prevented when the short edges of the box body are pre-folded, the number of scrapped box bodies is reduced, and production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of box body pre-folding edge-binding machine structure, specifically to a pre-folding support mechanism. Background Technology

[0002] The box pre-folding and edge-wrapping machine is an important piece of machinery used in the packaging industry. It is mainly used for pre-folding and edge-wrapping of various packaging boxes, improving the forming quality and production efficiency of the packaging boxes.

[0003] Currently, when the pre-folding and edge-wrapping machine pre-folds the short side of the packaging box, the free end of the short side may interfere with the long sides on both sides during the bending process, resulting in different included angles at the four corners of the box. The four corners of the product box opening are prone to defects such as clamping and dust leakage when the edge-folding mechanism attaches the short side of the product, resulting in a high scrap rate of the box. Utility Model Content

[0004] The technical problem this invention aims to solve is that, in current pre-folding and edge-sealing machines, the free end of the short side may interfere with the long sides on both sides of the short side during operation, resulting in inconsistent included angles at the four corners of the box, a large number of scrapped boxes, and high production costs. The purpose is to provide a pre-folding support mechanism, which uses a box-supporting cylinder to drive two box-supporting components to abut against the inner side of the long side of the box, applying an outward force to the long side of the box, preventing interference between the short side of the box and the inner side of the long side of the box during pre-folding, reducing the number of scrapped boxes, and lowering production costs.

[0005] This utility model is achieved through the following technical solution:

[0006] A pre-folding support mechanism includes a top mold box-supporting mechanism and a pre-folding mechanism. The top mold box-supporting mechanism includes a box-supporting cylinder and a box-supporting component, with the box-supporting component connected to the output end of the box-supporting cylinder. Two pre-folding mechanisms are included, each located on either side of the box-supporting component's moving direction. Each pre-folding mechanism includes a folding edge component, a driving component, and two scraper components, each located on either side of the folding edge component. In operation, the box-supporting component abuts against the inner side of the long side of the box body, the driving component causes the folding edge component to bend the short side of the box body, and the driving component causes the scraper components to flatten the four corners of the box body.

[0007] The beneficial effects of this utility model are as follows: By connecting the box-supporting component to the output end of the box-supporting cylinder and setting two pre-folding mechanisms, which are respectively set on both sides of the top mold box-supporting mechanism, and setting the scraper components on both sides of the folding component, it is convenient that during operation, the box-supporting cylinder drives the two box-supporting components to abut against the inner side of the long side of the box body. Without affecting the overall quality of the box body, an outward force is applied to the long side of the box body, increasing the activity space for the short side of the box body to be folded. This prevents interference between the free end of the short side of the box body and the inner side of the long side of the box body when the driving component drives the folding component to bend the short side of the box body. This ensures that the four corners of the box body are all right angles. Furthermore, the driving component drives the scraper components to flatten the four corners of the box body, further ensuring the quality of the four corners of the box body. This reduces the occurrence of clamping and dust leakage at the four corners of the product box opening when the folding mechanism is attached to the short side of the product, reducing the number of scrapped boxes and lowering the overall production cost of the box body.

[0008] In some embodiments, the box-supporting components include two parts, and the box-supporting cylinder is a double-acting cylinder. The two box-supporting components are respectively connected to the free ends of the two piston rods of the box-supporting cylinder. By setting the box-supporting cylinder as a double-acting cylinder, it is convenient for the double-acting cylinder to drive the box-supporting components to move synchronously in opposite directions along the inner side of the box to expand the box, preventing interference between the short side and the long side when the short side of the box is bent; or to drive the box-supporting components to move synchronously towards each other, facilitating removal from the already processed box.

[0009] In some embodiments, the box support includes an adjusting block and two connecting strips. The two adjusting blocks are respectively connected to the free ends of the piston rods corresponding to the box support cylinder. The two connecting strips are adjustablely connected to both ends of the adjusting blocks. Each free end of the connecting strip is connected to a support block, which is vertically positioned at the lower end of the connecting strip. In operation, the box support cylinder moves the support block to abut against the inner side of the long side of the box, causing the free end of the long side of the box to expand outward. By having the box support cylinder move the support block synchronously in opposite directions along the inner side of the box to abut against the inner side of the long side of the box, the box expands outward, preventing interference between the short side and the long side when the short side of the box is bent; or by moving the box support synchronously in opposite directions, it facilitates removal from the already processed box.

[0010] In some embodiments, the adjusting block is provided with a connecting hole, and the connecting strip is provided with several threaded holes. The threaded holes are arranged along the length direction of the connecting strip, and the connecting bolt passes through the connecting hole and is screwed into the threaded hole. A scale is provided on the side wall of the connecting strip, and the scale is located on the side of the connecting strip away from the box-supporting cylinder. By arranging the threaded holes along the length direction of the connecting strip and having the connecting bolt pass through the connecting hole and be screwed into the threaded hole, it is convenient to adjust the distance between the two supporting blocks according to different lengths of the box, thereby enabling the box to be abut against boxes of different lengths and improving the versatility of the box-supporting component. Furthermore, the scale on the side wall of the connecting strip, located on the side of the connecting strip away from the box-supporting cylinder, facilitates the accuracy of adjusting the distance between the two supporting blocks.

[0011] In some embodiments, the system further includes a support and a first cylinder. The first cylinder is fixedly connected to the support and is vertically arranged. The box-supporting cylinder is fixedly connected to the free end of the piston rod of the first cylinder. In operation, the first cylinder drives the top mold box-supporting mechanism to move up and down. By providing the first cylinder, it is convenient to drive the top mold box-supporting mechanism downward during operation to expand the box body outward; when stopping operation, the first cylinder drives the top mold box-supporting mechanism upward to facilitate the current box body movement to reserve working space for the next box body.

[0012] In some embodiments, the box-supporting component further includes limiting strips and guide rods. Two limiting strips are connected to opposite sides of the box-supporting cylinder. The limiting strips are n-shaped, with through holes at both ends. One end of the guide rod slidably passes through the through hole and is fixedly connected to the corresponding adjusting block. The adjusting block is located inside the limiting strip, and the diameter of the end of the guide rod furthest from the adjusting block is larger than the through hole. By providing limiting strips and guide rods, the box-supporting cylinder can drive the two adjusting blocks to move in opposite directions during operation, and move under the guidance of the guide rods, thereby accurately limiting the running trajectory of the box-supporting component. Furthermore, by placing the adjusting block inside the limiting strip, the distance the adjusting block drives the supporting block to expand outwards when supporting the box body is limited, thus preventing damage to the box body during expansion and ensuring the quality of the box body.

[0013] In some embodiments, the driving component includes a translation cylinder and a pre-folding cylinder. The translation cylinder is a slider cylinder, and the slider of the translation cylinder is connected to the scraper component. The pre-folding cylinder is a pen-shaped cylinder, and the pre-folding cylinder is inclinedly disposed on one side of the translation cylinder. The free end of the piston rod of the pre-folding cylinder is hinged to the folding component. In the working state, the pre-folding cylinder drives the folding component to move along an arc-shaped trajectory. By connecting the slider of the translation cylinder to the scraper component, it is convenient to drive the scraper component to move through the translation cylinder, flattening the corresponding four corners of the box. Furthermore, by hinged to the free end of the piston rod of the pre-folding cylinder, it is convenient for the pre-folding cylinder to drive the folding component to move along the designed arc-shaped trajectory during operation. This allows the folding component to bend the free end of the short side towards the inside of the box when pre-pressing the short side of the box. When the pre-folded component is at its lowest point, the free end of the short side is pressed towards the short side from the inside of the box, ensuring the appearance quality of the short side of the box.

[0014] In some embodiments, the scraper component includes a push block, a scraper blade, and a limiting part. The push block is connected to the slider of the translation cylinder, the limiting part is connected to the lower ends of both sides of the push block, and the scraper blade is connected to both sides of the push block and located at the upper end of the limiting part. The blade tip of the scraper blade protrudes from the limiting part. In the working state, the limiting part abuts against the outer side of the short side of the box body, and the bottom of the scraper blade presses against the top of the four corners of the box body. By connecting the scraper blade to both sides of the push block and located at the upper end of the limiting part, and by having the blade tip of the scraper blade protrude from the limiting part, it is convenient for the limiting part to abut against the outer side of the short side of the box body during operation. The limiting part supports the outer side of the short side of the box body, which facilitates the pre-folding mechanism to provide support force for the short side during pre-folding, preventing the short side from deforming during pre-folding. At the same time, the scraper blade flattens the top of the four corners of the box body.

[0015] In some embodiments, the folding component includes a folding piece, two first hinge blocks, and two second hinge blocks. The two ends of the first hinge blocks are hinged to the push block and the folding piece, respectively. The two ends of the second hinge blocks are hinged to the push block and the folding piece, respectively. The second hinge blocks are located above the first hinge blocks, and the first and second hinge blocks are parallel to each other. The free end of the piston rod of the pre-folding cylinder is hinged to the second hinge blocks. By providing the first hinge blocks and two second hinge blocks, the working trajectory of the folding piece can be accurately limited.

[0016] In some embodiments, the second hinge block is triangular, and the push block, pre-folding cylinder, and folding edge are hinged to the triangular portion of the second hinge block. In the working state, the bottom of the folding edge is lower than the bottom of the push block. This facilitates the extension and retraction of the piston rod of the pre-folding cylinder, which drives the second hinge block to rotate, thereby enabling the folding edge to move along a designed arc trajectory to pre-press the short side of the box, ensuring the quality of the pre-pressing on the short side of the box.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] 1. First, the two supporting components are driven by the box-supporting cylinder to abut against the inner side of the long side of the box. Without affecting the overall quality of the box, an outward force is applied to the long side of the box, increasing the activity space for the short side of the box to be folded. This prevents interference between the free end of the short side of the box and the inner side of the long side when the short side of the box is bent, ensuring that all four corners of the box are right angles. The driving component then drives the scraper component to flatten the four corners of the box, further ensuring the quality of the four corners of the box. This reduces the occurrence of clamping and dust leakage at the four corners of the box opening when the product is flipped and the edge is attached to the short side of the product, reducing the number of scrapped boxes and lowering the overall production cost of the box.

[0019] 2. The support block is driven by the support cylinder to move synchronously in opposite directions along the inner side of the box, and abut against the inner side of the long side of the box to expand the box and prevent the long side and short side of the box from interfering with each other, or to drive the support block to move synchronously in opposite directions, so as to facilitate the removal of the support component from the processed box.

[0020] 3. During operation, the limiting part abuts against the outer side of the short side of the box body, and the limiting part supports the outer side of the short side of the box body. This facilitates the pre-folding mechanism to provide support for the short side when pre-folding, preventing the short side from deforming during pre-folding. At the same time, the scraper flattens the top of the four corners of the box body. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a structural diagram of the present invention;

[0023] Figure 2 This is a structural diagram of the top mold support box mechanism in this utility model;

[0024] Figure 3 This is a structural diagram of the top mold support box mechanism in this utility model from another perspective;

[0025] Figure 4 This is a structural diagram of the pre-folding mechanism in this utility model;

[0026] Figure 5 This is a structural diagram of a portion of the structure in this utility model;

[0027] Figure 6 In this utility model Figure 5 Another perspective on the structure.

[0028] The attached diagram shows the markings and corresponding component names:

[0029] Pre-folding cylinder 10, translation cylinder 11, scraper 12, limiting part 121, connecting block 13, folding edge piece 14, first hinge block 15, second hinge block 151, cylinder connecting part 152, push block 16, second cylinder 17, box support cylinder 20, first cylinder 21, connecting strip 22, box support piece 23, adjusting block 24, guide rod 25, support block 26, limiting strip 27, connecting bracket 28, box body 30, bracket 40. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0031] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0033] The terms "first," "second," etc., used in this utility model are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0034] Example

[0035] like Figures 1-6 As shown, this embodiment provides a pre-folding support mechanism, including a top mold box-supporting mechanism and a pre-folding mechanism. The top mold box-supporting mechanism includes a box-supporting cylinder 20 and a box-supporting component 23, with the box-supporting component 23 connected to the output end of the box-supporting cylinder 20. The pre-folding mechanism includes two components, which are located on both sides of the moving direction of the box-supporting component. Each pre-folding mechanism includes a folding edge component, a driving component, and two scraper components 12. The scraper components 12 are located on both sides of the folding edge component. In the working state, the box-supporting component 23 abuts against the inner side of the long side of the box body 30, the driving component drives the folding edge component to bend the short side of the box body 30, and the driving component drives the scraper components 12 to flatten the four corners of the box body 30.

[0036] See Figures 1-3 The box-supporting component 23 includes two parts, and the box-supporting cylinder 20 is a double-acting cylinder. The two box-supporting components 23 are respectively connected to the free ends of the two piston rods of the box-supporting cylinder 20. By setting the box-supporting cylinder 20 as a double-acting cylinder, it is convenient for the double-acting cylinder to drive the box-supporting components 23 to move synchronously in opposite directions along the inner side of the box body 30 to expand the box body 30, preventing interference between the short side and the long side when the short side of the box body 30 is bent; or to drive the box-supporting components 23 to move synchronously towards each other, making it convenient to remove them from the already processed box body 30.

[0037] See Figures 1-3 The box support component 23 includes an adjusting block 24 and two connecting strips 22. The two adjusting blocks 24 are respectively connected to the free ends of the piston rods corresponding to the box support cylinder 20. The two connecting strips 22 are respectively adjustablely connected to both ends of the adjusting blocks 24. Each free end of the connecting strips 22 is connected to a support block 26. The support block 26 is vertically arranged at the lower end of the connecting strip 22. In the working state, the box support cylinder 20 drives the support block 26 to move and abut against the inner side of the long side of the box body 30, and the free end of the long side of the box body 30 expands outward from the box body 30. By driving the support block 26 to move synchronously in opposite directions along the inner side of the box body 30 and abut against the inner side of the long side of the box body 30, the box body 30 is expanded outward to prevent interference between the short side and the long side when the short side of the box body 30 is bent; or the box support component 23 is driven to move synchronously in opposite directions to facilitate removal from the already processed box body 30.

[0038] See Figures 1-3The adjusting block 24 is provided with a connecting hole, and the connecting strip 22 is provided with several threaded holes. The threaded holes are arranged along the length direction of the connecting strip 22. The connecting bolt passes through the connecting hole and is screwed into the threaded hole. A scale is provided on the side wall of the connecting strip 22, and the scale is located on the side of the connecting strip 22 away from the box-supporting cylinder 20. By arranging the threaded holes along the length direction of the connecting strip 22 and having the connecting bolt pass through the connecting hole and be screwed into the threaded hole, it is convenient to adjust the distance between the two supporting blocks 26 according to different lengths of the box, thereby realizing the abutment of boxes 30 of different lengths and improving the versatility of the box-supporting component 23. The scale is also provided on the side wall of the connecting strip 22, and the scale is located on the side of the connecting strip 22 away from the box-supporting cylinder 20, which facilitates the accuracy of adjusting the distance between the two supporting blocks 26.

[0039] See Figures 1-3 It also includes a bracket 40 and a first cylinder 21. The first cylinder 21 is fixedly connected to the bracket 40 and is vertically arranged. The box-supporting cylinder 20 is fixedly connected to the free end of the piston rod of the first cylinder 21. In the working state, the first cylinder 21 drives the top mold box-supporting mechanism to move up and down. By setting the first cylinder 21, it is convenient to drive the top mold box-supporting mechanism to move downward during operation, so as to expand the box body 30 outward; when stopping work, the first cylinder 21 drives the top mold box-supporting mechanism to move upward, so as to move the current box body 30 to reserve working space for the next box body 30.

[0040] See Figure 3 Specifically, it also includes a connecting bracket 28, which is used to install the first cylinder 21, and the connecting bracket 28 is fixedly connected to the bracket 40 by bolts.

[0041] See Figures 1-3The support box component 23 further includes a limiting strip 27 and a guide rod 25. There are two limiting strips 27, which are respectively connected to both sides of the support box cylinder 20. The limiting strips 27 are n-shaped, and both ends of the limiting strips 27 are provided with through holes. One end of the guide rod 25 can slide through the through hole and is fixedly connected to the corresponding adjusting block 24. The adjusting block 24 is located inside the limiting strip 27, and the diameter of the end of the guide rod 25 away from the adjusting block 24 is larger than the through hole. By setting the limit bar 27 and the guide rod 25, the two adjusting blocks 24 can be driven to move in opposite directions or in the opposite direction when the box-supporting cylinder 20 is working, and move under the guidance of the guide rod 25, thereby accurately limiting the running trajectory of the box-supporting component 23. Furthermore, by setting the adjusting block 24 inside the limit bar 27, the distance that the adjusting block 24 drives the supporting block 26 to expand outward of the box body 30 when supporting the box body 30 is limited, thereby preventing damage to the box body 30 when expanding outward, and ensuring the quality of the box body 30.

[0042] See Figure 1 and Figure 4 The driving component includes a translation cylinder 11 and a pre-folding cylinder 10. The translation cylinder 11 is a slider cylinder, and the slider of the translation cylinder 11 is connected to the shovel 12 component. The pre-folding cylinder 10 is a pen-shaped cylinder, and the pre-folding cylinder 10 is inclinedly disposed on one side of the translation cylinder 11. The free end of the piston rod of the pre-folding cylinder 10 is hinged to the folding component. In the working state, the pre-folding cylinder 10 drives the folding component to move along an arc-shaped trajectory. By connecting the slider of the translation cylinder 11 to the scraper 12 component, it is convenient to move the scraper 12 component through the translation cylinder 11 to flatten the four corners of the corresponding box 30. Furthermore, by hinged the free end of the piston rod of the pre-folding cylinder 10 to the folding component, it is convenient for the pre-folding cylinder 10 to move the folding component along the designed arc trajectory during operation. This allows the folding component to bend the free end of the short side towards the inside of the box 30 when pre-pressing the short side of the box 30. When the pre-folded component is at the bottom, the free end of the short side is pressed towards the short side from the inside of the box 30, ensuring the appearance quality of the short side of the box 30.

[0043] See Figures 4-6The shovel 12 component includes a push block 16, a shovel 12, and a limiting part 121. The push block 16 is connected to the slider of the translation cylinder 11. The limiting part 121 is connected to the lower ends of both sides of the push block 16. The shovel 12 is connected to both sides of the push block 16 and is located at the upper end of the limiting part 121. The blade head of the shovel 12 protrudes from the limiting part 121. In the working state, the limiting part 121 abuts against the outer side of the short side of the box body 30, and the bottom of the shovel 12 is pressed against the top of the four corners of the box body 30. By connecting the scraper 12 to both sides of the pusher 16 and located at the upper end of the limiting part 121, the blade of the scraper 12 protrudes from the limiting part 121, so that during operation, the limiting part 121 abuts against the outer side of the short side of the box body 30. The limiting part 121 supports the outer side of the short side of the box body 30, so that the pre-folding mechanism can provide support for the short side when pre-folding, preventing the short side from deforming during pre-folding. At the same time, the scraper 12 flattens the top of the four corners of the box body 30.

[0044] See Figures 4-6 The folding component includes a folding piece 14, two first hinge blocks 15, and two second hinge blocks 151. The two ends of the first hinge blocks 15 are hinged to the push block 16 and the folding piece 14, respectively. The two ends of the second hinge blocks 151 are hinged to the push block 16 and the folding piece 14, respectively. The second hinge blocks 151 are located above the first hinge blocks 15, and the first hinge blocks 15 and the second hinge blocks 151 are parallel. The free end of the piston rod of the pre-folding cylinder 10 is hinged to the second hinge blocks 151. By setting the first hinge blocks 15 and the two second hinge blocks 151, the working trajectory of the folding piece 14 can be accurately limited.

[0045] See Figure 4 It also includes two second cylinders 17 and a connecting block 13. The connecting block 13 is connected to the upper end of the translation cylinder 11. The second cylinders 17 are fixedly connected to the bracket 40, and the free ends of the second cylinders 17 are fixedly connected to the corresponding connecting blocks 13. This facilitates the overall up-and-down movement of the pre-folding mechanism by means of the second cylinders 17.

[0046] See Figures 4-6 The second hinge block 151 is triangular. The push block 16, the pre-folding cylinder 10, and the folding edge piece 14 are hinged to the triangular part of the second hinge block 151. In the working state, the bottom of the folding edge piece 14 is lower than the bottom of the push block 16. This facilitates the extension and retraction of the piston rod of the pre-folding cylinder 10 to drive the second hinge block 151 to rotate, thereby enabling the folding edge piece 14 to move along the designed arc trajectory to pre-press the short side of the box body 30, ensuring the quality of the pre-pressing of the short side of the box body 30. The pre-folding cylinder 10 and the second hinge block 151 are hinged through the cylinder connecting part 152.

[0047] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pre-folded support mechanism, characterized by, include: A top mold support mechanism, comprising a support cylinder and a support component, wherein the support component is connected to the output end of the support cylinder; The pre-folding mechanism includes two pre-folding mechanisms, which are located on both sides of the moving direction of the support box member. Each pre-folding mechanism includes a folding member, a driving member, and two scraper members, which are located on both sides of the folding member. In the working state, the supporting box abuts against the inner side of the long side of the box body, the driving component drives the folding edge component to bend the short side of the box body, and the driving component drives the scraper component to flatten the four corners of the box body.

2. The pre-fold support mechanism of claim 1, wherein, Two support box components are provided, and the support box cylinder is a double-acting cylinder. The two support box components are respectively connected to the free ends of the two piston rods of the support box cylinder.

3. The pre-fold support mechanism of claim 2, wherein, The box support includes an adjusting block and two connecting strips. The two adjusting blocks are respectively connected to the free ends of the piston rods corresponding to the box support cylinder. The two connecting strips are respectively adjustablely connected to both ends of the adjusting blocks. Each free end of the two connecting strips is connected to a support block. The support block is vertically arranged at the lower end of the connecting strip. In the working state, the box support cylinder drives the support block to move and abut against the inner side of the long side of the box body, and the free end of the long side of the box body expands outward from the box body.

4. The pre-fold support mechanism of claim 3, wherein, The adjusting block is provided with a connecting hole, and the connecting strip is provided with several threaded holes. The threaded holes are arranged along the length of the connecting strip. The connecting bolt passes through the connecting hole and is screwed into the threaded hole. A scale is provided on the side wall of the connecting strip, and the scale is located on the side of the connecting strip away from the support cylinder.

5. The pre-fold support mechanism of claim 3, wherein, It also includes a bracket and a first cylinder. The first cylinder is fixedly connected to the bracket and is vertically arranged. The box-supporting cylinder is fixedly connected to the free end of the piston rod of the first cylinder. In the working state, the first cylinder drives the top mold box-supporting mechanism to move up and down.

6. The pre-fold support mechanism of claim 3, wherein, The support box component also includes a limiting strip and a guide rod. There are two limiting strips, which are respectively connected to both sides of the support box cylinder. The limiting strips are n-shaped, and each end of the limiting strip has a through hole. One end of the guide rod can slide through the through hole and is fixedly connected to the corresponding adjusting block. The adjusting block is located inside the limiting strip, and the diameter of the end of the guide rod away from the adjusting block is larger than the through hole.

7. The pre-fold support mechanism of claim 1, wherein, The driving component includes a translation cylinder and a pre-folding cylinder. The translation cylinder is a slider cylinder, and the slider of the translation cylinder is connected to the shovel component. The pre-folding cylinder is a pen-shaped cylinder, and the pre-folding cylinder is inclinedly disposed on one side of the translation cylinder. The free end of the piston rod of the pre-folding cylinder is hinged to the folding component. In the working state, the pre-folding cylinder drives the folding component to move along an arc-shaped trajectory.

8. The pre-fold support mechanism of claim 7, wherein, The shovel component includes a push block, a shovel blade, and a limiting part. The push block is connected to the slider of the translation cylinder. The limiting part is connected to the lower ends of both sides of the push block. The shovel blade is connected to both sides of the push block and located at the upper end of the limiting part. The blade tip of the shovel blade protrudes from the limiting part. In the working state, the limiting part abuts against the outer side of the short side of the box body, and the bottom of the shovel blade presses against the top of the four corners of the box body.

9. The pre-fold support mechanism of claim 8, wherein, The folding component includes a folding piece, two first hinge blocks, and two second hinge blocks. The two ends of the first hinge blocks are respectively hinged to the push block and the folding piece. The two ends of the second hinge blocks are respectively hinged to the push block and the folding piece. The second hinge blocks are located above the first hinge blocks. The first hinge blocks and the second hinge blocks are parallel. The free end of the piston rod of the pre-folding cylinder is hinged to the second hinge blocks.

10. The pre-fold support mechanism of claim 9, wherein, The second hinge block is triangular, and the push block, pre-folding cylinder and folding edge are respectively hinged to the triangular part of the second hinge block. In the working state, the bottom of the folding edge is lower than the bottom of the push block.

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