A quick-release lining forming folding box mechanism

Abstract

This utility model relates to the technical field of paper box production, and in particular to a quick-assembly inner lining forming and folding mechanism. It includes a flattening table, a pre-bending mechanism, a folding mechanism, and a shaping mechanism. The pre-bending mechanism is fixed to the machine frame platform, and the folding mechanism is installed at the drive end of the pre-bending mechanism. It folds the inner lining portion of the paper box blank laid on the flattening table, bending the inner lining at a certain angle. The shaping mechanism includes a shaping actuator and a shaping pressure plate. The shaping actuator is installed at the crossbeam supporting the machine frame, and the shaping pressure plate is connected to the drive end of the shaping actuator. Driven by the shaping actuator, it performs a pressing and shaping operation on the bent inner lining portion, thereby folding and fitting the inner lining to the paper box blank. In summary, through automated collaborative operation, folding efficiency is improved by replacing manual labor; the arc-shaped free end and buffer wheel ensure the quality of the inner lining; and the positioning and compensation design ensures folding accuracy and fit, thus improving production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of paper box production, and in particular to a quick-form folding mechanism for inner lining. Background Technology

[0002] In the paper box manufacturing industry, paper boxes with inner linings are widely used because they provide better protection and support. The production of these paper boxes involves a folding and forming process of the paper box blank (a sheet of material that has been cut and creasing pre-treated), among which the folding of the inner lining is a key step.

[0003] In traditional processes, folding the inner lining relies heavily on manual operation. Since the inner lining is often located in the middle of the cardboard box blank, the operating space is limited. Manual folding is not only inefficient but also results in uneven pressing force, easily leading to a loose fit and affecting subsequent transportation or molding stability. Furthermore, manual operation is prone to scratching or damaging the inner lining due to improper force control, reducing the product qualification rate.

[0004] In addition, since the inner lining is usually located in the middle of the cardboard box blank, its special shape and position greatly increase the difficulty of mechanized operation. Some existing cardboard box forming equipment has relatively simple functions and can often only perform folding and forming of single-layer box walls and simple crease boxes. For complex cardboard box blanks with inner lining structures, it is difficult to achieve efficient and high-quality automated folding.

[0005] Existing mechanized folding equipment often suffers from structural design flaws when processing linings: some equipment lacks precise guidance and cushioning mechanisms, easily scratching the lining during folding; some equipment cannot achieve integrated pre-bending, folding, and shaping of the lining, requiring multiple transfers of the blank, increasing process complexity; and some equipment has poor coordination between the shaping and folding mechanisms, easily causing interference during pressing and affecting the shaping effect. Therefore, there is an urgent need for an automated mechanism that can efficiently and accurately complete the folding and shaping of linings while avoiding damage to the lining. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] This utility model provides a quick-form lining forming and folding box mechanism, including a flat table, a pre-bending mechanism, a folding mechanism, and a shaping mechanism, all mounted on a supporting frame. A space is provided between the flat table and the frame platform of the supporting frame. The pre-bending mechanism is installed within the space and fixed to the frame platform. The folding mechanism is installed at the drive end of the pre-bending mechanism, thus, driven by the pre-bending mechanism, it is lifted upwards from the space and passes through a clearance hole on the flat table, folding the lining portion of the cardboard box blank laid on the flat table at a certain angle. The shaping mechanism includes a shaping actuator and a shaping pressure plate. The shaping actuator is installed on the crossbeam of the supporting frame, and the shaping pressure plate is connected to the drive end of the shaping actuator. Driven by the shaping actuator, the bent lining portion is pressed and shaped, thereby folding and fitting the lining to the cardboard box blank.

[0008] Furthermore: the pre-bending mechanism is provided with a pre-bending support plate, a pre-bending bracket and a pre-bending cylinder. The pre-bending bracket is fixed to the machine frame platform, the pre-bending cylinder is fixed to the pre-bending bracket, and the piston rod end of the pre-bending cylinder is driven to the pre-bending support plate, thereby driving the pre-bending support plate to move upward in a linear motion.

[0009] Furthermore, the pre-bending mechanism is also provided with a pre-bending guide shaft and a pre-bending bearing. The pre-bending bearing is fixedly connected to the pre-bending bracket, one end of the pre-bending guide shaft is fixedly connected to the pre-bending support plate, and the other end passes through the pre-bending bearing, thereby forming a linear motion system.

[0010] Furthermore, the pre-bending mechanism is also provided with a pre-bending auxiliary component. One end of the pre-bending auxiliary component is fixed to the pre-bending support plate, and the other end forms a free end, which is bent at a certain angle towards the axis of the pre-bending support plate. The end of the free end is set as an arc-shaped structure.

[0011] Furthermore: the folding mechanism is provided with a folding cylinder and a folding push rod, the folding cylinder is fixedly connected to the pre-bending support plate, and the folding push rod is fixedly connected to the piston rod end of the folding cylinder.

[0012] Furthermore, the folding mechanism is equipped with a buffer wheel, which is rotatably connected to the folding push rod.

[0013] Furthermore, the shaping mechanism is also equipped with a floating joint, and the shaping pressure plate is connected to the drive end of the shaping actuator through the floating joint.

[0014] Furthermore: the shaping pressure plate is provided with a clearance notch corresponding to the position of the folding mechanism, and the clearance notch is used to avoid the folding mechanism.

[0015] Furthermore, the flat table is also provided with a limiting strip, which is fixed to the flat table and is used to limit the side of the paper box blank.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Improve folding efficiency and automation level: Through the coordinated operation of pre-bending, folding and shaping mechanisms, the lining is integrated into an automated operation from flat laying to folding and shaping, replacing manual labor, greatly improving production efficiency and adapting to the needs of large-scale production.

[0018] 2. Ensure lining quality: The curved free end and buffer wheel design of the pre-bending auxiliary parts reduce scratches and wear on the lining during folding; the step-by-step operation of folding and shaping avoids damage to the lining caused by strong compression, thus improving the product qualification rate.

[0019] 3. Ensure folding accuracy and fit: The limiting strip enables precise positioning of the cardboard blank, the guide shaft and bearing of the pre-bending mechanism ensure folding stability, and the floating joint of the shaping mechanism compensates for deviations, so that the inner lining bends at a precise angle, presses tightly, and fits firmly.

[0020] 4. Structural optimization to reduce interference: The notch and groove design of the shaping pressure plate avoids interference with the folding and pre-bending mechanisms; the narrow design of the folding push rod and the large-area pressing of the shaping pressure plate take into account both bending effect and shaping quality.

[0021] Therefore, this utility model improves folding efficiency by using automated mechanisms to work together, replacing manual labor. The arc-shaped free end and buffer wheel ensure the quality of the inner lining, and the positioning and compensation design ensures folding accuracy and fit, thereby improving production efficiency and product quality.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a structural schematic diagram of the flat tabletop and the limiting strip of this utility model;

[0026] Figure 3 This is a structural schematic diagram of the pre-bending mechanism and pre-bending auxiliary component of this utility model;

[0027] Figure 4 This is a schematic diagram of the folding mechanism and pre-bending support plate of this utility model;

[0028] Figure 5 This is a schematic diagram of the folding push rod and buffer wheel of this utility model;

[0029] Figure 6 This is a schematic diagram of the shaping mechanism of this utility model in the pressing state.

[0030] The reference numerals and names in the figure are as follows:

[0031] 10 Support frame; 11 Crossbeam; 12 Frame platform; 20 Flat table; 21 Clearance hole; 22 Limiting strip; 30 Pre-bending mechanism; 31 Pre-bending support plate; 32 Pre-bending auxiliary component; 33 Pre-bending bracket; 34 Pre-bending cylinder; 35 Pre-bending guide shaft; 36 Pre-bending bearing; 40 Folding mechanism; 41 Folding cylinder; 42 Folding push rod; 43 Buffer wheel; 50 Shaping mechanism; 51 Shaping actuator; 52 Floating joint; 53 Shaping pressure plate; 54 Clearance notch; 55 Clearance groove. Detailed Implementation

[0032] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] Please see Figures 1 to 6 In this embodiment of the present invention, a quick-release lining forming folding box mechanism includes a flat table 20, a pre-bending mechanism 30, a folding mechanism 40, and a shaping mechanism 50, all mounted on a supporting frame 10. A space is provided between the flat table 20 and the frame platform 12 of the supporting frame 10. The pre-bending mechanism 30 is installed within this space and fixed to the frame platform 12. The folding mechanism 40 is installed at the driving end of the pre-bending mechanism 30, thereby being pushed upwards from the space under the drive of the pre-bending mechanism 30 and passing through the flat table 20. The clearance holes 21 on the table 20 are used to fold the inner lining of the cardboard blank laid on the table 20, bending the inner lining at a certain angle. The shaping mechanism 50 is provided with a shaping actuator 51 and a shaping pressure plate 53. The shaping actuator 51 is installed at the crossbeam 11 of the support frame 10, and the shaping pressure plate 53 is connected to the driving end of the shaping actuator 51. Thus, under the drive of the shaping actuator 51, the inner lining in the bent state is pressed and shaped, thereby making the inner lining folded and attached to the cardboard blank.

[0034] Specifically, cardboard box blanks, also known as cardboard box pieces, refer to sheet materials that have undergone pre-processing such as cutting and creasing, and already possess the dimensions and shape of a cardboard box (including the inner lining), lying flat and ready for folding. For cardboard box blanks with an inner lining, the inner lining needs to be folded first to fit snugly against the cardboard box blank for easier transportation or folding later. Since the inner lining is usually located in the middle of the cardboard box blank, it is not convenient for mechanized operations. When folding manually, the pressing pressure is insufficient, resulting in a loose fit that can easily affect the positional relationship between the inner lining and the cardboard box blank, and may even damage the inner lining, affecting the quality of the final product. Therefore, improvements are necessary.

[0035] This invention employs a flat table 20 with clearance holes 21 to lay out the cardboard box blank. Then, a pre-bending mechanism 30 installed in the space beneath the flat table 20 lifts the folding mechanism 40 upwards, causing it to rise from within the clearance holes 21. First, the pre-bending mechanism 30 lifts the inner lining portion upwards at a certain angle. Then, the folding mechanism 40 continues to bend the upward-bent inner lining portion at a greater angle, bending it outwards towards the outer edge of the cardboard box blank, forming an outward-folded curved state for the shaping mechanism 50 to press it. Finally, the shaping pressure plate 53 of the shaping mechanism 50 further folds and presses the outward-folded inner lining portion, ensuring it fits tightly against the cardboard box blank, completing the folding and forming operation of the inner lining. With this configuration, the folding mechanism will not damage the inner lining during the inner lining forming process, and can efficiently press the inner lining and provide sufficient pressing pressure to ensure that the inner lining can be tightly attached to the cardboard box blank, which is convenient for subsequent transportation and folding.

[0036] like Figures 1 to 3 As shown, preferably, the pre-bending mechanism 30 is provided with a pre-bending support plate 31, a pre-bending bracket 33 and a pre-bending cylinder 34. The pre-bending bracket 33 is fixedly connected to the machine frame plate 12, and the pre-bending cylinder 34 is fixedly connected to the pre-bending bracket 33. The piston rod end of the pre-bending cylinder 34 is drivenly connected to the pre-bending support plate 31, thereby driving the pre-bending support plate 31 to move upward in a linear motion.

[0037] Specifically, in order to perform an upward folding operation on the inner lining, a pre-bending mechanism 30 is preferably provided. The pre-bending cylinder 34 drives the pre-bending plate 31 to perform an upward linear movement, so that the pre-bending plate 31 passes through the clearance hole 21 of the flat table 20, thereby bending the inner lining of the paper box blank upward to form a bent state with a certain angle, which facilitates the subsequent folding mechanism 40 to perform further bending operations on the inner lining.

[0038] like Figures 2 to 3 As shown, preferably, the pre-bending mechanism 30 is further provided with a pre-bending guide shaft 35 and a pre-bending bearing 36. The pre-bending bearing 36 is fixedly connected to the pre-bending bracket 33. One end of the pre-bending guide shaft 35 is fixedly connected to the pre-bending support plate 31, and the other end passes through the pre-bending bearing 36, thereby forming a linear motion system.

[0039] Specifically, to further improve the smoothness of the upward movement of the pre-bending support plate 31, a linear motion system is preferably provided to assist the pre-bending support plate 31 in moving up and down. The pre-bending bearing 36 is preferably a flange-type linear bearing, which is convenient to install on the pre-bending bracket 33, allowing it to cooperate with the pre-bending guide shaft 35 to form a linear motion system.

[0040] like Figures 2 to 4 As shown, preferably, the pre-bending mechanism 30 is further provided with a pre-bending auxiliary component 32. One end of the pre-bending auxiliary component 32 is fixed to the pre-bending support plate 31, and the other end forms a free end, which is bent at a certain angle in the axial direction of the pre-bending support plate 31, and the end of the free end is set as an arc-shaped structure.

[0041] Specifically, since the inner lining of the cardboard box blank is initially laid flat, the folding mechanism 40 cannot fold it directly. The pre-bending cylinder 34 needs to drive the pre-bending tray 31 upwards to first bend the inner lining upwards, placing it in a preset bent state, which facilitates subsequent bending operations at a larger angle by the folding mechanism 40. However, the edge of the pre-bending tray 31 is close to the bending crease of the inner lining. Therefore, when the pre-bending tray 31 drives the inner lining upwards, due to torque issues, a greater force needs to be applied to the inner lining, and the inner lining is easily scratched during the force application process.

[0042] Therefore, it is preferable to install a pre-bending auxiliary component 32 on the pre-bending support plate 31. Utilizing the height of the pre-bending auxiliary component 32 itself, its free end can first contact the inner lining part, and the free end is bent in the direction of the axis of the pre-bending support plate 31, so that the contact point with the inner lining can be relatively far away from the bending indentation of the inner lining. Thus, only a small force is needed to drive the inner lining to bend, avoiding scratching the inner lining.

[0043] Secondly, to optimize the contact torque between the pre-bending auxiliary component 32 and the lining, and to create a certain buffering performance, preferably, the angle between the free end of the pre-bending auxiliary component 32 and the pre-bending support plate 31 is set to less than 90°, so that the pre-bending auxiliary component 32 is in a bent state, thereby better relieving some of the force and creating a certain buffering performance. In addition, the free end of the pre-bending auxiliary component 32 is set as an arc-shaped structure so that it will not scratch the lining when it contacts the lining.

[0044] like Figures 4 to 5As shown, preferably, the folding mechanism 40 is provided with a folding cylinder 41 and a folding push rod 42. The folding cylinder 41 is fixedly connected to the pre-bending support plate 31, and the folding push rod 42 is fixedly connected to the piston rod end of the folding cylinder 41.

[0045] Specifically, in order to further bend the lining that is in the initial bending state, a folding mechanism 40 is preferably provided. The folding cylinder 41 drives the folding push rod 42 to move horizontally parallel to the pre-bending support plate 31, so that the lining continues to bend towards the outer periphery of the carton blank, thereby facilitating the subsequent pressing operation of the shaping mechanism 50.

[0046] Secondly, multiple folding mechanisms 40 can be provided on the pre-bending tray 31, which can be set according to the number of linings to be folded. If folding of linings in four directions is required, four sets of folding mechanisms 40 are provided. If folding of linings in three directions is required, three sets of folding mechanisms 40 are provided.

[0047] As shown in Figure 5, preferably, the folding mechanism 40 is provided with a buffer wheel 43, which is rotatably connected to the folding push rod 42.

[0048] Specifically, to optimize the contact method between the folding push rod 42 and the liner, a buffer wheel 43 is preferably provided at the end of the folding push rod 42 facing the liner, and made of a material with a certain cushioning effect, such as plastic. When the folding push rod 42 pushes and folds the liner, the rotational characteristics of the buffer wheel 43 can convert the sliding friction of the folding push rod 42 into rolling friction, further reducing wear or scratches on the liner.

[0049] like Figure 1 and Figure 6 As shown, preferably, the shaping mechanism 50 is further provided with a floating joint 52, and the shaping pressure plate 53 is connected to the driving end of the shaping actuator 51 through the floating joint 52.

[0050] Specifically, the shaping actuator 51 preferably uses a hydraulic cylinder or pneumatic cylinder from the prior art to provide a strong pressing force to the shaping platen 53. Alternatively, the shaping platen 53 can be connected to the piston rod end of the actuator via a floating joint 52. The piston rod end is connected to the shaping platen 53 via the floating joint 52 (Y-type / flange type), which can compensate for ±5° angular error, optimize the deviation of the shaping platen 53, and enable the shaping platen 53 to perform a tight pressing operation on the inner liner, ensuring the inner liner adheres to the cardboard box blank.

[0051] like Figure 1 and Figure 6 As shown, preferably, the shaping pressure plate 53 is provided with a clearance notch 54 corresponding to the position of the folding mechanism 40, and the clearance notch 54 is used to avoid the folding mechanism 40.

[0052] Specifically, since the folding push rod 42 of the folding mechanism 40 remains in the pushing position on the inner liner when the shaping pressure plate 53 moves downward, in order to avoid damage to the folding mechanism 40 by the shaping pressure plate 53, it is preferable to provide a clearance notch 54 at the position of the shaping pressure plate 53 corresponding to the folding mechanism 40, so that it avoids the folding mechanism 40. Similarly, in the area of ​​the shaping pressure plate 53 corresponding to the clearance hole 21, a corresponding clearance groove 55 also needs to be provided to avoid the pre-bending support plate 31 and the pre-bending auxiliary component 32. Moreover, there is no inner liner at the position of the clearance hole 21, so no pressing is required. Therefore, providing a clearance groove 55 can further reduce the weight of the shaping pressure plate 53.

[0053] Secondly, since the inner liner itself has a certain length, it can be pressed together at both ends. At the same time, because the lateral width of the folding push rod 42 is very small relative to the length of the inner liner, even after the shaping platen 53 is equipped with the avoidance notch 54, it can still perform a large-area pressing operation on the long side of the inner liner, so that the inner liner can be tightly attached to the carton blank.

[0054] The folding mechanism 40 only needs to bend the liner to a certain extent, without pushing it over a large area. Therefore, the lateral width of the folding push rod 42 can be set relatively small. It only needs to generate a certain pushing force on the liner to achieve bending.

[0055] In addition, the shaping plate 53 can be framed with metal and fixed to the floating joint 52 using the metal frame. For the pressing parts that directly contact the liner, they can be made of wood or plastic, which can reduce the overall weight of the shaping plate 53 and avoid the risk of scratching the liner by the metal material.

[0056] like Figure 2 and Figure 4 As shown, preferably, the flat table 20 is also provided with a limiting strip 22, which is fixed to the flat table 20 and is used to limit the side of the paper box blank.

[0057] Specifically, in order to ensure that the inner lining of the cardboard box blank can be aligned with the clearance hole 21 when it is laid on the flat table 20, so that the folding mechanism 40 and the shaping mechanism 50 can accurately bend and shape the inner lining, it is preferable to set a limiting strip 22 on the flat table 20. This allows the worker to align the edge of the side of the cardboard box blank with the limiting strip 22 when laying it out, thus quickly positioning the cardboard box blank.

[0058] Secondly, it is understandable that multiple limiting strips 22 can be set. For example, at least two limiting strips 22 can be set on the two sides where the cardboard blanks intersect, corresponding to the positions of the flat table 20, so as to position the laying position of the cardboard blanks. For relatively long sides, two or three limiting strips 22 can also be set for joint positioning.

[0059] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A quick liner forming and folding box mechanism, characterized by, The system includes a flat table (20), a pre-bending mechanism (30), a folding mechanism (40), and a shaping mechanism (50) respectively installed on the support frame (10). A space is provided between the flat table (20) and the frame platform (12) of the support frame (10). The pre-bending mechanism (30) is installed within the space and fixed to the frame platform (12). The folding mechanism (40) is installed at the drive end of the pre-bending mechanism (30), thereby being pushed upwards from the space under the drive of the pre-bending mechanism (30) and passing through the opening on the flat table (20). The clearance hole (21) folds the inner lining of the paper box blank laid on the flat table (20) and bends the inner lining at a certain angle; the shaping mechanism (50) is provided with a shaping actuator (51) and a shaping pressure plate (53). The shaping actuator (51) is installed at the crossbeam (11) of the support frame (10), and the shaping pressure plate (53) is connected to the driving end of the shaping actuator (51). Thus, under the drive of the shaping actuator (51), the inner lining in the bending state is pressed and shaped, so that the inner lining is folded and attached to the paper box blank.

2. A quick liner forming and folding box mechanism according to claim 1, characterized in that, The pre-bending mechanism (30) is provided with a pre-bending support plate (31), a pre-bending bracket (33) and a pre-bending cylinder (34). The pre-bending bracket (33) is fixed to the machine frame plate (12), and the pre-bending cylinder (34) is fixed to the pre-bending bracket (33). The piston rod end of the pre-bending cylinder (34) is connected to the pre-bending support plate (31) for transmission, thereby driving the pre-bending support plate (31) to move linearly upward.

3. A quick liner forming and folding box mechanism according to claim 2, characterized in that, The pre-bending mechanism (30) is also provided with a pre-bending guide shaft (35) and a pre-bending bearing (36). The pre-bending bearing (36) is fixed to the pre-bending bracket (33). One end of the pre-bending guide shaft (35) is fixed to the pre-bending support plate (31), and the other end passes through the pre-bending bearing (36), thereby forming a linear motion system.

4. A quick liner forming and folding box mechanism according to claim 2, characterized in that, The pre-bending mechanism (30) is also provided with a pre-bending auxiliary component (32). One end of the pre-bending auxiliary component (32) is fixed to the pre-bending support plate (31), and the other end forms a free end and bends at a certain angle toward the axis of the pre-bending support plate (31). The end of the free end is set as an arc structure.

5. A quick liner forming and folding box mechanism according to claim 1, wherein, The folding mechanism (40) is provided with a folding cylinder (41) and a folding push rod (42). The folding cylinder (41) is fixed to the pre-bending support plate (31), and the folding push rod (42) is fixed to the piston rod end of the folding cylinder (41).

6. A quick liner forming and folding box mechanism according to claim 5, characterized in that, The folding mechanism (40) is provided with a buffer wheel (43), which is rotatably connected to the folding push rod (42).

7. A quick liner forming and folding box mechanism according to claim 1, characterized in that, The shaping mechanism (50) is also provided with a floating joint (52), and the shaping pressure plate (53) is connected to the driving end of the shaping actuator (51) through the floating joint (52).

8. A quick liner forming and folding box mechanism according to claim 1, characterized in that, The shaping plate (53) is positioned corresponding to the folding mechanism (40) and has a clearance notch (54) for avoiding the folding mechanism (40).

9. A quick liner forming and folding box mechanism according to claim 1, characterized in that, The paving table board (20) is further provided with a limiting strip (22) which is fixed to the paving table board (20) and used for limiting the side edges of the carton blank.

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