A creasing device for carton production

Abstract

The utility model relates to a kind of indentation device for carton production, including the press bench being set to indentation device, the press bench is provided with mounting groove, recess adjusting structure is provided in the inside of mounting groove, recess adjusting structure includes the bow piece being set to the inside of mounting groove and for cooperating indentation steel wire.Indentation device for carton production, two extrusion pieces are controlled to move to each other using electric push rod, so as to adjust the height of bow piece using the slope of trapezoidal platform in extrusion piece extruding the slope of bow piece, further reach the depth of indentation groove is changed, so as to adapt to the paperboard of different thickness, realize indentation groove depth automation regulation, without dismounting press bench, it can solve the tedious problem of manual replacement press bench, shorten downtime, further improve production efficiency, further utilize the resilience of elastic component and push bow piece accurate reset, avoid reset lag or deviation, and bow piece can be ensured to be always attached with trapezoidal platform slope.

Description

Technical Field

[0001] This utility model relates to the field of cardboard box production technology, specifically to an indentation device for cardboard box production. Background Technology

[0002] The carton production process can be divided into two main stages: paper manufacturing and carton forming. Carton forming includes corrugation forming, printing, die cutting, creasing, joining and forming, inspection and packaging. Among them, the creasing process refers to using creasing steel wire and creasing groove to press a groove of appropriate depth on the part of the corrugated cardboard that needs to be bent, so that the cardboard can be folded accurately and smoothly along this line, ultimately forming the carton's upright edges, bottom seal, and lid structure.

[0003] In the current technology, the creasing process of corrugated cardboard is carried out using a creasing device. The hydraulic system on the creasing device controls the downward movement of the creasing steel line, so that the downward creasing steel line acts on the surface of the corrugated cardboard and squeezes it into the creasing groove, thereby pressing a groove into the corrugated cardboard.

[0004] In actual production and processing, changing the type of cardboard used to produce cartons can lead to several problems. If the cardboard becomes thicker while the groove depth remains the same, pressing will result in excessively deep grooves on the cardboard, causing excessive fiber breakage in the grooves and directly damaging the cartons. Conversely, if the cardboard becomes thinner while the groove depth remains the same, pressing will result in shallow grooves on the cardboard, preventing the cardboard from folding smoothly along the crease line. During folding, the cardboard will shift towards the non-crease area, causing the corners of the cartons to become crooked. Adjusting the depth of the crease groove on the press table by disassembling and replacing it requires manual operation with tools, which not only results in long downtime but is also cumbersome. Therefore, a crease device for carton production is proposed to solve these problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a creasing device for carton production, which has the advantage of automatically adjusting the depth of the creasing groove. This solves the problems of: when changing the type of cardboard used to produce cartons, if the cardboard becomes thicker but the groove depth remains the same, pressing will result in excessively deep grooves on the cardboard, causing excessive breakage of local fibers in the grooves and direct damage to the carton; if the cardboard becomes thinner but the groove depth remains the same, pressing will result in excessively shallow grooves on the cardboard, making it impossible for the cardboard to fold smoothly along the creasing line, and causing it to shift towards the non-creasing area during folding, resulting in crooked corners of the carton. If the depth of the creasing groove on the pressing table is adjusted by disassembling and replacing the pressing table, it requires manual operation by workers using tools, which not only results in long downtime but also is cumbersome.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a creasing device for carton production, comprising a pressing table disposed on the creasing device, wherein a mounting groove is provided on the pressing table, and a groove adjustment structure is provided inside the mounting groove;

[0007] The groove adjustment structure includes an arc-shaped component disposed inside the mounting groove and used to cooperate with the indentation steel wire. Two extrusion components are disposed inside the mounting groove to push the arc-shaped component to move up and down. A gear for linking the two extrusion components is rotatably mounted inside the mounting groove, and the two extrusion components are symmetrical about the central axis of the gear. An electric push rod for driving the extrusion components to move is fixedly mounted on the mounting groove.

[0008] The bow-shaped component has an indentation groove and two symmetrically distributed inclined surfaces.

[0009] The extrusion component includes a trapezoidal platform that is slidably installed in the mounting groove, with the slope of the trapezoidal platform parallel to the inclined plane. A rack portion is fixedly installed on the trapezoidal platform, and the rack portion meshes with a gear. The telescopic end of the electric push rod is fixedly connected to the rack portion on one side.

[0010] Furthermore, elastic components for automatically resetting the bow-shaped component are fixedly installed on both sides of the bow-shaped component, and the elastic components are arranged symmetrically around the central axis of the gear.

[0011] Furthermore, the elastic component includes two gaskets, with the top gasket fixedly connected to the bow-shaped component and the bottom gasket fixedly connected to the inner bottom wall of the mounting groove. A spring is fixedly installed between the opposite sides of the two gaskets, and a guide rod that passes through the spring and the other gasket is fixedly installed on the top gasket, with the guide rod slidably connected to the bottom gasket.

[0012] Furthermore, the inner bottom wall of the mounting groove has two guide grooves that extend to the bottom of the pressure table, and one end of the guide rod extends through and into the interior of the guide groove, with the guide rod slidably connected to the guide groove.

[0013] Furthermore, the inner bottom wall of the mounting groove has two limiting grooves that extend to the bottom of the pressure table. The bottom of each of the two trapezoidal platforms is fixedly equipped with a limiting block that extends to the limiting groove, and the limiting block is slidably connected to the limiting groove.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. This creasing device for carton production uses an electric push rod to control the movement of two extrusion parts towards each other. The slope of the trapezoidal platform in the extrusion part is used to press the inclined surface of the bow-shaped part, thereby adjusting the height of the bow-shaped part and thus changing the depth of the creasing groove. This allows it to adapt to cardboard of different thicknesses and achieves automatic adjustment of the creasing groove depth. It eliminates the need to disassemble the press table, thus solving the tedious problem of manually changing the press table, shortening downtime, and further improving production efficiency.

[0016] 2. The creasing device used for carton production adds symmetrically distributed elastic components on both sides of the bow-shaped component. When the electric push rod is driven in the reverse direction, the rebound force of the elastic components pushes the bow-shaped component to accurately reset, avoiding reset lag or deviation. It can also ensure that the bow-shaped component is always in contact with the slope of the trapezoidal platform, ensuring continuous force transmission during the adjustment process and avoiding inaccurate groove depth caused by empty stroke. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 1 sectional view

[0019] Figure 3 This is an enlarged view of the groove adjustment structure of this utility model;

[0020] Figure 4 This is an exploded view of the groove adjustment structure of this utility model;

[0021] Figure 5 This is a schematic diagram showing the fit between the bow-shaped component and the extrusion component of this utility model.

[0022] In the diagram: 1. Pressing table; 11. Mounting groove; 2. Groove adjustment structure; 21. Bow-shaped part; 211. Indentation groove; 212. Inclined surface; 22. Extruded part; 221. Trapezoidal platform; 222. Rack part; 223. Limiting block; 23. Gear; 24. Electric push rod; 25. Elastic component; 251. Shim; 252. Spring; 253. Guide rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figure 1-5The creasing device for carton production in this embodiment includes a pressing table 1 disposed on the creasing device, a mounting groove 11 disposed on the pressing table 1, and a groove adjustment structure 2 disposed inside the mounting groove 11.

[0025] Example 2: Please refer to Figure 1-5 Based on Embodiment 1, the groove adjustment structure 2 includes an arc-shaped component 21 disposed inside the mounting groove 11 and used to cooperate with the indentation steel wire. The mounting groove 11 is provided with two extrusion components 22 for pushing the arc-shaped component 21 to move up and down. The mounting groove 11 is rotatably mounted with a gear 23 for linking the two extrusion components 22, and the two extrusion components 22 are symmetrical about the central axis of the gear 23. An electric push rod 24 for driving the extrusion components 22 to move is fixedly mounted on the mounting groove 11, realizing automatic adjustment of the depth of the indentation groove 211 without disassembling the pressure table 1, solving the tedious problem of manually replacing the pressure table 1, shortening downtime, improving production efficiency, and the structure is integrated into the mounting groove 11, which is compact and does not take up extra space, and is compatible with the existing equipment layout.

[0026] The bow-shaped part 21 has an indentation groove 211 and two symmetrically distributed inclined surfaces 212.

[0027] The extrusion component 22 includes a trapezoidal platform 221 that is slidably installed in the mounting groove 11, and the slope of the trapezoidal platform 221 is parallel to the inclined surface 212. A rack portion 222 is fixedly installed on the trapezoidal platform 221, and the rack portion 222 meshes with the gear 23. The telescopic end of the electric push rod 24 is fixedly connected to the rack portion 222 on one side. The two extrusion components 22 are symmetrically linked through the gear 23, so that the extrusion force on the bow-shaped component 21 is uniform, ensuring that the depth adjustment of the indentation groove 211 is stable and adaptable to cardboard of different thicknesses.

[0028] The inner bottom wall of the mounting groove 11 has two limiting grooves that extend to the bottom of the pressure table 1. The bottom of each of the two trapezoidal platforms 221 is fixedly equipped with a limiting block 223 that extends to the limiting groove. The limiting block 223 is slidably connected to the limiting groove. The limiting block 223 cooperates with the limiting groove to restrict the trapezoidal platform 221 to move only in the horizontal direction, ensuring that the rack part 222 and the gear 23 are always precisely meshed, fixing the movement trajectory of the trapezoidal platform 221, ensuring the repeatability of each adjustment, and reducing the error of groove depth adjustment.

[0029] Using the above technical solution, after changing the cardboard type, the electric push rod 24 is activated, triggering the depth adjustment of the indentation groove 211. The telescopic end of the electric push rod 24 drives the rack part 222 on one side to move horizontally. The rack part 222 meshes with the gear 23, driving the gear 23 to rotate, which in turn drives the rack part 222 on the other side to move horizontally in the opposite direction. The trapezoidal platform 221 moves symmetrically and synchronously with the rack part 222. Its slope surface is pressed against the inclined surface 212 of the bow-shaped part 21. The horizontal pressing force is converted into a vertical thrust, pushing the bow-shaped part 21 to move up and down, thereby changing the depth of the indentation groove 211.

[0030] Example 3: Please refer to Figure 1-5 Based on Embodiment 2, elastic components 25 for automatic reset of the bow-shaped component 21 are fixedly installed on both sides of the bow-shaped component 21. The elastic components 25 are arranged symmetrically around the central axis of the gear 23. The elastic component 25 includes two pads 251. The top pad 251 is fixedly connected to the bow-shaped component 21, and the bottom pad 251 is fixedly connected to the inner bottom wall of the mounting groove 11. A spring 252 is fixedly installed between the opposite sides of the two pads 251. A guide rod 253 is fixedly installed on the top pad 251, passing through the spring 252 and the other pad 251. The guide rod 253 is slidably connected to the bottom pad 251. The guide rod 253 restricts the elastic component 25 to extend and retract only in the vertical direction, preventing the bow-shaped component 21 from tilting and ensuring that the indentation groove 211 is horizontally aligned.

[0031] The inner bottom wall of the mounting groove 11 has two guide grooves that extend to the bottom of the pressure table 1. One end of the guide rod 253 extends through and into the interior of the guide groove. The guide rod 253 is slidably connected to the guide groove. The guide groove further constrains the movement direction of the guide rod 253, preventing the bow-shaped part 21 from swaying laterally when it moves up and down, and ensuring that the central axis of the indentation groove 211 is accurately aligned with the indentation steel line.

[0032] Using the above technical solution, after adjustment, the hydraulic control system of the indentation device controls the indentation steel line to move downward and act on the corrugated cardboard, so that it is pressed into the indentation groove 211 to form a suitable groove. The electric push rod 24 is started in the opposite direction, the gear 23 drives the rack part 222 to move in the opposite direction, the extrusion pressure of the trapezoidal platform 221 is reduced, and the bow-shaped part 21 is reset under the action of the elastic component 25, so as to realize the reverse adjustment of the groove depth.

[0033] The working principle of the above embodiments is as follows:

[0034] When the creasing device for carton production is in use, the creasing groove 211 on the bow-shaped part 21 is at its initial depth, which is adapted to the current cardboard type. The trapezoidal platforms 221 of the two extrusion parts 22 are in symmetrical initial positions and are in slight contact with the inclined surface 212 of the bow-shaped part 21. The elastic part 25 is in its natural state.

[0035] After changing the cardboard type, start the electric push rod 24 to trigger the depth adjustment of the indentation groove 211. The telescopic end of the electric push rod 24 drives the rack part 222 on one side to move horizontally. The rack part 222 meshes with the gear 23, driving the gear 23 to rotate, which in turn drives the rack part 222 on the other side to move horizontally in the opposite direction. The trapezoidal platform 221 moves symmetrically with the rack part 222. Its slope is pressed against the inclined surface 212 of the bow-shaped part 21. The horizontal pressing force is converted into vertical thrust, which pushes the bow-shaped part 21 to move up and down, thereby changing the depth of the indentation groove 211.

[0036] After adjustment, the hydraulic control system of the indentation device controls the indentation steel line to move downward and act on the corrugated cardboard, pressing it into the indentation groove 211 to form a suitable groove. The electric push rod 24 is activated in the reverse direction, and the gear 23 drives the rack part 222 to move in the reverse direction. The pressure of the trapezoidal platform 221 is reduced, and the bow-shaped part 21 is reset under the action of the elastic component 25, realizing the reverse adjustment of the groove depth.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A creasing device for carton production, comprising a pressure table (1) disposed on the creasing device, characterized in that: The pressure table (1) is provided with an installation groove (11), and the installation groove (11) is provided with a groove adjustment structure (2). The groove adjustment structure (2) includes an arc-shaped component (21) disposed inside the mounting groove (11) and used to cooperate with the indentation steel wire. The mounting groove (11) is provided with two extrusion components (22) for pushing the arc-shaped component (21) to move up and down. The mounting groove (11) is rotatably mounted with a gear (23) for linking the two extrusion components (22), and the two extrusion components (22) are symmetrical about the central axis of the gear (23). An electric push rod (24) for driving the extrusion components (22) to move is fixedly mounted on the mounting groove (11). The bow-shaped part (21) is provided with an indentation groove (211) and two symmetrically distributed inclined surfaces (212) are provided on the bow-shaped part (21). The extrusion member (22) includes a trapezoidal platform (221) that is slidably installed in the mounting groove (11), and the slope of the trapezoidal platform (221) is parallel to the inclined plane (212). A rack portion (222) is fixedly installed on the trapezoidal platform (221), and the rack portion (222) meshes with the gear (23). The telescopic end of the electric push rod (24) is fixedly connected to the rack portion (222) on one side.

2. The creasing device for carton production according to claim 1, characterized in that: Both sides of the bow-shaped component (21) are fixedly installed with elastic components (25) for automatically resetting the bow-shaped component (21), and the elastic components (25) are arranged symmetrically with respect to the central axis of the gear (23).

3. The creasing device for carton production according to claim 2, characterized in that: The elastic component (25) includes two gaskets (251), with the top gasket (251) fixedly connected to the bow-shaped component (21) and the bottom gasket (251) fixedly connected to the inner bottom wall of the mounting groove (11). A spring (252) is fixedly installed between the opposite sides of the two gaskets (251). A guide rod (253) that passes through the spring (252) and the other gasket (251) is fixedly installed on the top gasket (251), and the guide rod (253) is slidably connected to the bottom gasket (251).

4. The creasing device for carton production according to claim 3, characterized in that: The inner bottom wall of the mounting groove (11) has two guide grooves that extend to the bottom of the pressure table (1), and one end of the guide rod (253) extends through and into the interior of the guide groove, and the guide rod (253) is slidably connected to the guide groove.

5. The creasing device for carton production according to claim 1, characterized in that: The inner bottom wall of the mounting groove (11) has two limiting grooves that extend to the bottom of the pressure table (1). The bottom of the two trapezoidal tables (221) is fixedly equipped with limiting blocks (223) that extend to the limiting grooves, and the limiting blocks (223) are slidably connected to the limiting grooves.

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