A folding and flattening device for printed cartons

Abstract

The utility model provides a kind of edge folding and flattening device of printing color box, including base, the top of base is fixedly installed with U-shaped frame, the top of U-shaped frame is installed with electric push cylinder one, and the output shaft of electric push cylinder one is installed with abutment plate;The output shaft outside electric push cylinder one is sleeved with cross plate, and the bottom of cross plate is connected with fixed plate;The top of fixed plate is inserted with upper die;The top of base is slidably connected with bottom plate, and the top of bottom plate is fixedly installed with lower die matched with circular groove to realize edge folding and flattening cooperation.The utility model can accurately flatten the edge of printing color box paperboard by the accurate cooperation of upper die and lower die, compared with manual edge lifting and edge folding, greatly improve the precision and quality stability of edge folding, ensure that the edge of each printing color box can reach consistent standard, improve the overall quality of product;Through the collaborative work of electric push cylinder one, electric push cylinder two, optical axis and spring etc., automatic edge folding and flattening operation is realized.

Description

Technical Field

[0001] This utility model belongs to the field of printing color box processing technology, and more specifically, it relates to a folding and flattening device for printing color boxes. Background Technology

[0002] In the manufacturing process of printed color boxes (such as round mooncake boxes), the folding and flattening of the edges after laminating the paper is a key step that determines the quality of the product. This step requires precise positioning of the color box blank, followed by regular pressing of the laminating paper on its edges to ensure that the edges are flat, wrinkle-free, and tightly fitted to the box body, directly affecting the appearance and structural stability of the color box.

[0003] Current edge-folding and flattening devices suffer from the following core problems: low automation and high reliance on manual labor. Most devices require manual pushing of the lower mold carrying the color box to the pressing station, followed by manual pulling out the part after processing. When facing mass production demands, workers need to perform frequent and repetitive pushing and pulling operations, significantly increasing labor intensity and easily leading to decreased operational efficiency due to fatigue. Furthermore, manual pushing makes it difficult to guarantee the alignment accuracy of the lower and upper molds each time. Therefore, in view of these issues, this paper researches and improves upon existing structures and shortcomings to provide an edge-folding and flattening device for printed color boxes, aiming to achieve a more practical and valuable solution. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a folding and flattening device for printed color boxes, which is achieved by the following specific technical means: A folding and flattening device for printed color boxes includes a base. A U-shaped frame is fixedly installed at the top of the base. An electric push cylinder is vertically installed at the top of the U-shaped frame. The output shaft of the electric push cylinder passes through the U-shaped frame, and a stop plate is fixedly installed at its bottom. A horizontal plate is fitted outside the output shaft of the electric push cylinder and inside the U-shaped frame. Two electric push cylinders are vertically installed on both sides of the bottom of the horizontal plate. The bottom ends of the two sets of electric push cylinders are connected to a fixed plate. A through groove is opened in the center of the fixed plate and directly below the stop plate. The stop plate is slidably inserted into the through groove. An upper mold is installed at the bottom of the fixed plate. A circular groove is opened in the center of the upper mold. Two sets of guide rails are installed at the top of the base and inside the U-shaped frame. A bottom plate is slidably connected between the two sets of guide rails through guide blocks. An installation groove is opened at the top of the bottom plate. A lower mold that matches the circular groove is inserted into the installation groove to achieve folding and flattening.

[0005] As a preferred technical solution of this utility model, a rectangular groove is provided at the top of the base and between the two sets of guide rails. A side plate is installed at the bottom inner side of the rectangular groove. A sliding groove is provided inside the side plate. A lead screw is installed inside the sliding groove. A ball nut that cooperates with the lead screw is sleeved on the outside of the lead screw. A slider that can slide with the sliding groove is installed on the outside of the ball nut. The slider is fixedly connected to the bottom end of the base plate.

[0006] As a preferred embodiment of this utility model, a geared motor is fixedly installed on one side of the side plate, and the output end of the geared motor extends through the inside of the slide groove and is coaxially and fixedly connected with the lead screw.

[0007] As a preferred embodiment of this utility model, the horizontal top section of the shaped frame and the two sides of the electric push cylinder are respectively provided with through holes. Two sets of optical shafts are vertically installed on the top of the horizontal plate. The top ends of the two sets of optical shafts are respectively movably inserted into the corresponding through holes and extend to the top of the shaped frame, and the top ends of the optical shafts are fixedly installed with limiting plates. Springs are fitted on the outer sides of the two sets of optical shafts, and the two ends of the two sets of springs are respectively abutted against the bottom end of the corresponding limiting plate and the top end of the horizontal top section of the shaped frame.

[0008] As a preferred embodiment of this utility model, both ends of the two sets of guide rails are connected to baffles for limiting the sliding range of the base plate.

[0009] As a preferred technical solution of this utility model, two sets of positioning grooves are respectively opened on both sides of the fixing plate, and four sets of positioning posts corresponding to the positioning grooves and capable of being inserted and matched are vertically installed on the top of the upper mold; one end of each of the two sets of positioning posts on the same side is provided with a connected slot, and a connecting plate is movably inserted into the slots of the two sets of positioning posts on the same side, and the vertical sections of the two sets of connecting plates are attached to one side of the fixing plate.

[0010] As a preferred embodiment of this utility model, one side of the vertical section of each of the two sets of connecting plates is threaded with a wing bolt, and one end of the wing bolt is fastened to the side of the fixing plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This invention, through the precise coordination of the upper and lower molds, can accurately flatten the folded edges of printed color box cardboard. Compared with manual edge raising and folding, it greatly improves the accuracy and quality stability of the folding, ensuring that the folded edges of each printed color box meet the same standard, thus improving the overall quality of the product. Through the coordinated work of electric push cylinder one, electric push cylinder two, optical shaft, and springs, the folding and flattening operation is automated, reducing the time and steps of manual operation. It can also complete the folding and flattening process of cardboard quickly and efficiently, significantly improving production efficiency. The base plate can be moved in position through lead screws, guide rails, and geared motors, improving the automation level of the device and enhancing its versatility and flexibility. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 .

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 .

[0014] Figure 3 This is a partial structural diagram of the present invention. Figure 1 .

[0015] Figure 4 This is a partial structural diagram of the present invention. Figure 2 .

[0016] Figure 5 This is a utility model Figure 4 Enlarged diagram of point A in the middle.

[0017] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Base; 2. C-shaped frame; 3. Electric push cylinder one; 4. Support plate; 5. Horizontal plate; 6. Electric push cylinder two; 7. Fixing plate; 8. Upper mold; 9. Guide rail; 10. Base plate; 11. Lower mold; 12. Side plate; 13. Lead screw; 14. Slider; 15. Gear motor; 16. Wing bolt; 17. Optical axis; 18. Limiting plate; 19. Spring; 20. Baffle; 21. Positioning post; 22. Connecting plate. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example:

[0022] As attached Figure 1 To be continued Figure 5 As shown: This utility model provides a folding and flattening device for printed color boxes, including a base 1. A U-shaped frame 2 is fixedly installed at the top of the base 1. An electric push cylinder 3 is vertically installed at the top of the U-shaped frame 2. The output shaft of the electric push cylinder 3 passes through the interior of the U-shaped frame 2, and a stop plate 4 is fixedly installed at its bottom end. A horizontal plate 5 is fitted outside the output shaft of the electric push cylinder 3 and inside the U-shaped frame 2. Electric push cylinders 6 are vertically installed on both sides of the bottom end of the horizontal plate 5. The bottom ends of the two sets of electric push cylinders 6 are connected to a fixing plate 7. A through groove is provided in the center of the plate 7 and directly below the abutment plate 4, and the abutment plate 4 is slidably inserted into the through groove; an upper mold 8 is installed at the bottom end of the fixed plate 7, and a circular groove is provided in the center of the upper mold 8; two sets of guide rails 9 are installed at the top of the base 1 and inside the C-shaped frame 2, and a base plate 10 is slidably connected between the two sets of guide rails 9 through guide blocks. An installation groove is provided at the top of the base plate 10, and a lower mold 11 that is adapted to the circular groove to achieve folding and flattening is inserted into the installation groove.

[0023] The base 1 has a rectangular groove at its top, located between the two sets of guide rails 9. A side plate 12 is installed at the bottom inner side of the rectangular groove. A sliding groove is formed inside the side plate 12, and a lead screw 13 is installed inside the sliding groove. A ball nut is fitted on the outside of the lead screw 13, and a slider 14 that slides with the sliding groove is installed on the outside of the ball nut. The slider 14 is fixedly connected to the bottom end of the base plate 10. This allows for precise linear movement of the base plate 10, enabling more accurate control of the sliding distance of the base plate 10, ensuring the alignment accuracy of the lower mold 11 and the upper mold 8, and further improving the consistency of the folding and flattening process.

[0024] A geared motor 15 is fixedly installed on one side of the side plate 12. The output end of the geared motor 15 extends through the slide groove and is coaxially and fixedly connected to the lead screw 13. This achieves automated control of the movement of the base plate 10, eliminating the need for manual adjustment of the base plate 10's position, reducing worker workload, and especially when batch processing color boxes of different specifications, it allows for rapid mold position switching, reducing waiting time between processes and improving overall production efficiency.

[0025] The horizontal top section of the U-shaped frame 2, located on both sides of the electric push cylinder 3, has through holes. Two sets of optical shafts 17 are vertically mounted on the top of the horizontal plate 5. The tops of the two sets of optical shafts 17 are movably inserted into the corresponding through holes and extend above the U-shaped frame 2, with a limiting plate 18 fixedly mounted on their tops. Springs 19 are fitted onto the outer sides of both sets of optical shafts 17, with both ends of the springs 19 abutting against the bottom of the corresponding limiting plate 18 and the top of the horizontal top section of the U-shaped frame 2. This provides bidirectional guidance for the vertical movement of the horizontal plate 5, preventing it from tilting due to uneven force, ensuring that the upper mold 8 driven by the electric push cylinder 6 remains horizontal, and avoiding uneven pressing of the folded edge due to mold tilting. Furthermore, the elastic abutment of the springs 19 provides buffering force when the horizontal plate 5 moves downward, reducing the impact force at the moment of start-up of the electric push cylinder 3, reducing rigid collisions between components, and extending the service life of parts.

[0026] Both ends of the two sets of guide rails 9 are connected to baffles 20 to limit the sliding range of the base plate 10. The baffles 20 can directly limit the sliding range of the base plate 10, preventing the base plate 10 from slipping off the guide rails 9 due to loss of control of the reduction motor 15 or operational errors, thus avoiding equipment damage or safety accidents.

[0027] The fixed plate 7 has two sets of positioning slots on each side. The top of the upper mold 8 has four sets of positioning posts 21, each corresponding to one of the positioning slots and capable of being inserted into them. One end of each set of positioning posts 21 on the same side has a connected slot. A connecting plate 22 is movably inserted into the slots of both sets of positioning posts 21 on the same side. The vertical sections of both connecting plates 22 are abutted against one side of the fixed plate 7. The one-to-one insertion of the four sets of positioning posts 21 into the positioning slots allows for rapid initial positioning of the upper mold 8, ensuring precise alignment of the central circular groove of the upper mold 8 with the abutment plate 4 and the lower mold 11, avoiding positional deviations during manual installation. Simultaneously, the two sets of positioning posts 21 on the same side are connected by the connecting plate 22, forming a lateral constraint and further ensuring the stability of the mold installation.

[0028] Both sets of connecting plates 22 have wing bolts 16 threaded onto one side of their vertical sections, and one end of each wing bolt 16 is securely connected to the side of the fixing plate 7. The wing bolts 16 can be manually rotated and adjusted without the need for specialized tools. Compared to traditional hex bolts or ordinary bolts, this significantly simplifies the disassembly and replacement process of the upper mold 8. When different sizes of color boxes need to be processed or when mold wear requires replacement, mold assembly and disassembly can be completed quickly, reducing equipment downtime for maintenance.

[0029] The working principle of this embodiment: First, the circular printed color box blank, such as a mooncake box blank, is placed upside down on the lower mold 11 at the top of the base plate 10. The contour positioning structure of the lower mold 11 is used to ensure that the center of the color box blank is aligned with the center of the lower mold 11, thus avoiding subsequent pressing misalignment. Then, the reduction motor 15 on one side of the side plate 12 is started, and its output end drives the lead screw 13 in the slide groove of the side plate 12 to rotate. Since the ball nut on the outside of the lead screw 13 is fixedly connected to the slider 14, and the slider 14 is connected to the bottom end of the base plate 10, the slider 14 will drive the base plate 10 along the slide groove and move smoothly towards the upper mold 8 under the guidance and constraint of the two sets of guide rails 9. When the base plate 10 moves the lower mold 11 to the pressing station where the center of the lower mold 11 is precisely aligned with the center of the upper mold 8, the baffles 20 at both ends of the guide rail 9 further restrict the displacement of the base plate 10 to prevent overtravel and slippage, thus completing the automated positioning.

[0030] Next, the electric push cylinder 3 at the top of the shaped frame 2 is activated, and its output shaft extends downward, simultaneously driving the bottom plate 4 to move downward. At the same time, the horizontal plate 5 on the outside of the output shaft of the electric push cylinder 3, with the vertical guide optical shaft of the two sets of optical shafts 17 passing through the through hole of the shaped frame and the buffer effect of the spring 19, abuts against the limiting plate and the top section of the shaped frame at both ends, maintaining a horizontal state and moving downward smoothly to avoid the horizontal plate tilting and causing subsequent pressing deviation. When the plate 4 passes through the through groove in the center of the fixed plate 7 and contacts the color box blank on the lower mold 11, the electric push cylinder 3 stops moving downward, and the color box blank is fixed on the lower mold 11 by the slight pressure of the plate 4 to prevent the blank from shifting during the subsequent folding process. Subsequently, the two sets of electric push cylinders 6 at the bottom of the horizontal plate 5 are activated, and their output shafts extend downwards simultaneously, driving the fixed plate 7 and the upper mold 8 at the bottom to move vertically downwards. Since the upper mold 8 has a circular groove in the center that matches the contour of the lower mold 11, when the lower mold 11 is fully embedded in the circular groove of the upper mold 8, the paper to be folded on the outer edge of the color box blank will be squeezed by the inner wall of the upper mold 8 and the outer wall of the lower mold 11, precisely pressed to fit the surface of the color box blank without wrinkles or deviation, thus completing the folding and flattening operation.

[0031] After pressing is completed, electric push cylinder 2 6 first drives the upper mold 8 to move up and reset, then electric push cylinder 1 3 drives the abutment plate 4 and the horizontal plate 5 to move up and reset; finally, the reduction motor 15 rotates in reverse, driving the base plate 10 to move out of the pressing station along the guide rail 9, and the workers can then remove the processed color box and enter the next processing cycle.

[0032] When processing round printed color boxes of different sizes, manually loosen the wing bolts 16 on the vertical section of the two sets of connecting plates 22 so that one end of the bolt is detached from the side of the fixing plate 7; then pull the two sets of connecting plates 22 out of the slots of the two sets of positioning pins 21 on the same side to release the lateral constraint of the upper mold 8. Then pull the upper mold 8 down so that the four sets of positioning pins 21 at its top are separated from the positioning groove of the fixing plate 7, and the old upper mold 8 can be removed. At the same time, pull out the lower mold 11, which is interference-fitted with the mounting groove of the base plate 10.

[0033] Next, insert the four sets of positioning pins 21 at the top of the new upper mold 8 into the positioning slots on both sides of the fixing plate 7 to achieve the initial positioning of the new mold; then insert the two sets of connecting plates 22 into the slots of the two sets of positioning pins 21 on the same side, so that the vertical section of the connecting plate 22 fits against the side of the fixing plate 7; finally, tighten the wing bolts 16 to securely connect the connecting plate 22 to the fixing plate 7, and complete the installation of the new upper mold 8. At the same time, insert the matching lower mold 11 into the mounting slot at the top of the base plate 10. The entire mold changing process does not require professional tools and is highly efficient and convenient.

[0034] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A folding and flattening device for a printed color box, comprising a base (1), characterized in that: A U-shaped frame (2) is fixedly installed at the top of the base (1). An electric push cylinder (3) is vertically installed at the top of the U-shaped frame (2). The output shaft of the electric push cylinder (3) passes through the U-shaped frame (2), and a stop plate (4) is fixedly installed at its bottom end. A horizontal plate (5) is fitted outside the output shaft of the electric push cylinder (3) and inside the U-shaped frame (2). Electric push cylinders (6) are vertically installed on both sides of the bottom end of the horizontal plate (5). The bottom ends of the two sets of electric push cylinders (6) are connected to a fixing plate (7). The center of the fixing plate (7) is located at the stop plate (4). A through groove is provided directly below the 4), and the abutment plate (4) is slidably inserted into the through groove; an upper mold (8) is installed at the bottom end of the fixing plate (7), and a circular groove is provided in the center of the upper mold (8); two sets of guide rails (9) are installed at the top of the base (1) and inside the shaped frame (2), and a base plate (10) is slidably connected between the two sets of guide rails (9) through guide blocks; an installation groove is provided at the top of the base plate (10), and a lower mold (11) that is adapted to the circular groove is inserted into the installation groove to achieve the folding and flattening fit.

2. The folding and flattening device for printed color boxes as described in claim 1, characterized in that: A rectangular groove is provided at the top of the base (1) and between the two sets of guide rails (9). A side plate (12) is installed at the bottom inner side of the rectangular groove. A sliding groove is provided inside the side plate (12). A lead screw (13) is installed inside the sliding groove. A ball nut that cooperates with the lead screw (13) is sleeved on the outside of the lead screw (13). A slider (14) that can slide with the sliding groove is installed on the outside of the ball nut. The slider (14) is fixedly connected to the bottom end of the base plate (10).

3. The folding and flattening device for printed color boxes as described in claim 2, characterized in that: A geared motor (15) is fixedly installed on one side of the side plate (12). The output end of the geared motor (15) extends through the inside of the slide groove and is coaxially fixedly connected to the lead screw (13).

4. The folding and flattening device for printed color boxes as described in claim 1, characterized in that: The horizontal top section of the convex frame (2) and the two sides of the electric push cylinder (3) are respectively provided with through holes. Two sets of optical shafts (17) are vertically installed on the top of the horizontal plate (5). The tops of the two sets of optical shafts (17) are respectively movably inserted into the corresponding through holes and extend to the top of the convex frame (2). A limiting plate (18) is fixedly installed on the top of the optical shafts (17). Springs (19) are fitted on the outer side of the two sets of optical shafts (17). The two ends of the two sets of springs (19) are respectively abutted against the bottom end of the corresponding limiting plate (18) and the top end of the horizontal top section of the convex frame (2).

5. The folding and flattening device for printed color boxes as described in claim 1, characterized in that: Both ends of the two sets of guide rails (9) are connected to baffles (20) for limiting the sliding range of the base plate (10).

6. The folding and flattening device for printed color boxes as described in claim 1, characterized in that: Two sets of positioning grooves are respectively opened on both sides of the fixed plate (7). Four sets of positioning pins (21) corresponding to the positioning grooves and can be inserted and matched are vertically installed on the top of the upper mold (8). One end of the two sets of positioning pins (21) on the same side is opened with a connected slot. A connecting plate (22) is movably inserted into the slot of the two sets of positioning pins (21) on the same side. The vertical sections of the two sets of connecting plates (22) are attached to one side of the fixed plate (7).

7. The folding and flattening device for printed color boxes as described in claim 6, characterized in that: Both sets of connecting plates (22) have a wing bolt (16) threaded on one side of the vertical section, and one end of the wing bolt (16) is fastened to the side of the fixing plate (7).

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