A carton corner forming machine
By using cylinder-driven rounded corner molds and fixed-length rod positioning technology, the problem of inconsistent paper strip bends in packaging box production has been solved, enabling automated production, improving production efficiency and finished product appearance quality, and reducing labor and equipment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN WACHING PRINTING CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-09
AI Technical Summary
Existing packaging box production equipment has mechanical limitations and insufficient control precision when bending paper strips, resulting in inconsistent openings, which affects the appearance of the finished product and increases production costs.
The rounded corner mold is driven by a cylinder for automated operation. Combined with a fixed length rod and a positioning rod, it achieves precise positioning and consistency of the rounded corners of the cardboard shell, reduces manual operation, and improves production efficiency and appearance quality.
It achieves automated forming of cardboard corners, ensuring that the length of each corner point is consistent, reducing labor costs, reducing scrap rate, adapting to the production needs of cardboard of different sizes, and reducing the cost of repeated equipment purchases.
Smart Images

Figure CN224335189U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of packaging box forming technology, specifically relating to a packaging box rounded corner forming machine. Background Technology
[0002] Packaging boxes are mostly made by rounding the corners of strips of cardboard and then gluing them together. Therefore, during the production process, it is necessary to ensure that the cardboard can be bent at precise positions so that it can be successfully glued into a box later.
[0003] Existing packaging box production equipment often uses mechanical bending or folding methods when bending paper strips at the corners. Typically, the paper strips are bent four times manually, and then the openings are glued together to form a packaging box. However, due to the limitations of the mechanical structure and insufficient control precision, the production staff cannot ensure that each opening is in the same position, which is not conducive to uniform gluing in the later stages. Traditional gluing often uses manual application of glue or simple mechanical gluing methods. If the openings are not uniform, it will also lead to an increase in production costs and affect the appearance and aesthetics of the finished packaging box. Utility Model Content
[0004] The purpose of this utility model is to provide a packaging box rounding corner forming machine to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a packaging box corner rounding forming machine, including a base, a working groove on the top of the base, a positioning rod in the working groove, a fixing frame on the outside of the base, cylinders symmetrically arranged on the top of the fixing frame, the telescopic rod of the cylinder passing through the fixing frame and connected to an installation plate, and a corner rounding mold installed at the bottom of the installation plate.
[0006] Preferably, the rounded corner mold is located above the positioning rod.
[0007] Preferably, a start button is provided on the front side of the base, and the start button is electrically connected to the cylinder.
[0008] Preferably, the fixing frame is provided with slide rails on both the left and right sides, and a fixed-length rod is connected between the slide rails.
[0009] Preferably, the fixed-length rod is an inverted "U" shape.
[0010] Preferably, the fixed-length rod consists of one horizontal bar and two vertical bars, and the vertical bars are slidably connected to the slide rail by means of grooves.
[0011] Preferably, the top of the vertical rod is provided with a scale.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This invention uses a cylinder to drive the rounded corner mold to move up and down, thus realizing the automated operation of rounded corner forming of paper shells. Compared with traditional manual operation, it greatly reduces the time and labor intensity of manual operation and improves production efficiency.
[0014] This utility model is equipped with a fixed length rod and a positioning rod, which can quickly and accurately locate the rounded corners of the cardboard shell, so that the lengths between the rounded corners of the cardboard shell are consistent, avoiding the tedious process of manual measurement and positioning, further accelerating the rounded corner forming speed and improving production efficiency.
[0015] In this invention, the rounded corners have a consistent curvature, and the lengths between the rounded corners of the cardboard are consistent. This ensures that the openings are in the same position during subsequent gluing, avoiding the problem of unsightly appearance caused by inconsistent openings and improving the appearance quality of the finished packaging box.
[0016] This utility model adopts automated operation, reduces reliance on manual labor, lowers labor costs, reduces damage to cardboard or waste caused by improper operation, improves the utilization rate of raw materials, and thus reduces production costs.
[0017] The fixed-length rod in this invention can slide back and forth between the slide rails, and the top of the vertical rod is marked with a scale, which can adapt to the forming and production of cardboard boxes of different sizes. This allows one machine to meet the production needs of packaging boxes of various specifications and reduce the repeated purchase cost of equipment. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is a three-dimensional structural diagram of the first part of this utility model;
[0020] Figure 3 This is a three-dimensional structural diagram of the second part of this utility model.
[0021] The numbers in the diagram are: 1-base, 2-working groove, 3-positioning rod, 4-fixed frame, 5-cylinder, 6-mounting plate, 7-rounded corner mold, 8-start button, 9-slide rail, 10-length rod, 101-horizontal bar, 102-vertical bar, 11-slide groove, 12-scale. Detailed Implementation
[0022] 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.
[0023] Example 1
[0024] like Figures 1 to 3 The packaging box corner rounding forming machine shown includes a base 1, a working groove 2 on the top of the base 1, a positioning rod 3 inside the working groove 2, a fixing frame 4 on the outside of the base 1, cylinders 5 symmetrically arranged on the top of the fixing frame 4, the telescopic rod of the cylinders 5 passing through the fixing frame 4 and connected to a mounting plate 6, and a corner rounding mold 7 installed at the bottom of the mounting plate 6; the corner rounding mold 7 is located above the positioning rod 3; a start button 8 is provided on the front side of the base 1, and the start button 8 is electrically connected to the cylinders 5; slide rails 9 are provided on both the left and right sides of the fixing frame 4, and a fixed length rod 10 is connected between the slide rails 9. The fixed length rod 10 is an inverted "U" shape, which is divided into one horizontal rod 101 and two vertical rods 102. The vertical rods 102 are slidably connected to the slide rails 9 by opening a sliding groove 11; a scale 12 is provided on the top of the vertical rods 102.
[0025] This invention automates the rounded corner forming of cardboard by using a cylinder 5 to drive the rounded corner mold 7 to move up and down. Compared to traditional manual methods, this significantly reduces the time and labor intensity of manual operation and improves production efficiency. The invention also incorporates a length-fixing rod 10 and a positioning rod 3, enabling quick and accurate positioning of the rounded corner points of the cardboard, ensuring consistent lengths between all rounded corner points. This eliminates the tedious process of manual measurement and positioning, further accelerating the rounded corner forming process and increasing production efficiency. Furthermore, the consistent rounded corner curvature and lengths between all rounded corner points in this invention ensure that the openings can be properly sealed during subsequent bonding. The openings are aligned in the same position, avoiding the unsightly appearance caused by inconsistent openings, thus improving the appearance quality of the finished packaging boxes. This utility model adopts automated operation, reducing reliance on manual labor, lowering labor costs, and reducing damage to cardboard or waste caused by improper operation, thereby improving the utilization rate of raw materials and reducing production costs. The fixed-length rod 10 in this utility model can slide back and forth between the slide rails 9, and the top of the vertical rod 102 is provided with a scale 12, which can adapt to the forming and production of cardboard boxes of different sizes, so that one machine can meet the production needs of packaging boxes of various specifications, reducing the cost of repeated purchase of equipment.
[0026] Example 2
[0027] like Figures 1 to 3The packaging box corner rounding forming machine shown includes a base 1 and a fixing frame 4. The fixing frame 4 is installed on the outside of the base 1 and is stably erected on the working plane by the base 1. The top of the fixing frame 4 is symmetrically equipped with cylinders 5, or other electrical devices such as motors, that can drive components to move up and down. The top of the fixing frame 4 has mounting holes for mounting the cylinders 5, meaning the telescopic rods of the cylinders 5 can pass through the mounting holes on the top of the fixing frame 4 and move within the fixing frame 4. A mounting plate 6 is connected between the bottom of the telescopic cylinders 5, and the mounting plate 6 is used to mount the corner rounding mold 7. The corner rounding mold 7 is used for feeding paper. The cardboard shell is partially bent to create at least four rounded corners before being glued together to form a packaging box. A forming groove is located at the bottom. In practical applications, the cardboard shell is placed under the rounded corner mold 7. The cylinder 5 then moves the mounting plate 6 and the rounded corner mold 7 downwards to bend and shape the cardboard shell. The forming time is 3-5 seconds. After forming, the cylinder 5 moves the mounting plate 6 and the rounded corner mold 7 upwards. The cardboard shell is then removed. Before the rounded corner mold 7 presses down again, the next area of the cardboard shell requiring rounded corners is placed under the rounded corner mold 7 for shaping. This process is repeated. The rounded corner mold 7 must be shorter than the positioning rod 3 to ensure the machine can perfectly shape cardboard shells shorter than the rounded corner mold 7.
[0028] The base 1 has a working groove 2 on its top, which is open at the front and back. A positioning rod 3 is set in the working groove 2. The shape of the positioning rod 3 is the forming arc of the rounded corner mold 7, and also the arc of the corner required for the cardboard. When the rounded corner mold 7 is pressed down, it can be inserted into the positioning rod 3. The worker only needs to place the cardboard on the positioning rod 3 in advance. The rounded corner mold 7 presses down and causes the cardboard to bend on the positioning rod 3 to form the required rounded corner arc. After forming, the rounded corner mold 7 moves upward and is no longer inserted into the positioning rod 3. The worker takes out the cardboard with the first rounded corner and puts the cardboard on the positioning rod 3 again. This process is repeated to complete the second, third and fourth rounded corners. After the rounded corners are completed, the cardboard is glued together to form a box.
[0029] Example 3
[0030] like Figures 1 to 3 The packaging box rounding forming machine shown here, after fulfilling the requirement of rounding the corners of the paper shell, also needs to measure the rounded corner points of the paper shell in advance to ensure that the side length of the paper shell after rounding is consistent. Specifically, the length between each rounded corner point of the paper shell is fixed. When the required paper shell to be prepared in this embodiment is a square paper shell, that is, the length between each rounded corner point is consistent, assuming it is n, the length of the square paper shell is 4n. The bonding point can be defined as the starting point and the ending point of the paper strip, that is, the first rounded corner point is n / 2, the second rounded corner point is 3n / 2, the third rounded corner point is 5n / 2, and the fourth rounded corner point is 7n / 2.
[0031] Based on the above data, the rounded corner points can be pre-determined on the cardboard. However, considering that the above operation will cause additional damage to the cardboard, a fixed-length rod 10 can be set to achieve the effect of fixed-length rounded corners on the cardboard. Specifically, the fixing frame 4 is provided with slide rails 9 on both the left and right sides, and a fixed-length rod 10 is connected between the slide rails 9. The fixed-length rod 10 is concave and consists of one horizontal rod 101 and two vertical rods 102. The vertical rods 102 are slidably connected to the slide rails 9 by opening a sliding groove 11. That is, the fixed-length rod 10 can slide back and forth between the slide rails 9. After sliding, the distance between its horizontal rod 101 and the positioning rod 3 is n.
[0032] In this way, only one rounded corner point needs to be set. After bending the corner at the first rounded corner point, the cardboard can be adjusted to abut against the fixed length rod 10 to complete the positioning of the second rounded corner point. This process can be repeated.
[0033] The fixed length rod 10 can slide back and forth between the slide rails 9. After sliding, the distance between its horizontal bar 101 and the positioning rod 3 is n, which means that the user can adjust the actual value of n by sliding the fixed length rod 10 back and forth to adapt to the forming and production of cardboard of different sizes. Furthermore, a scale 12 is provided on the top of the vertical rod 102 for workers to quickly and accurately adjust the distance n.
[0034] Furthermore, a start button 8 is provided on the front side of the base 1. The start button 8 is electrically connected to the cylinder 5. Pressing the start button 8 once will cause the cylinder 5 to extend or retract once, so that the four rounded corners of the cardboard can be shaped evenly and accurately, achieving precise control over the forming of the cardboard.
[0035] 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.
[0036] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A packaging box corner rounding forming machine, comprising a base, characterized in that, The base has a working groove at the top, a positioning rod in the working groove, a fixing frame on the outside of the base, cylinders symmetrically arranged on the top of the fixing frame, the telescopic rod of the cylinders passing through the fixing frame and connected to a mounting plate, and a rounded corner mold installed at the bottom of the mounting plate.
2. The packaging box rounding corner forming machine according to claim 1, characterized in that, The rounded corner mold is located above the positioning rod.
3. The packaging box rounding corner forming machine according to claim 1, characterized in that, A start button is provided on the front side of the base, and the start button is electrically connected to the cylinder.
4. The packaging box rounding corner forming machine according to claim 1, characterized in that, The fixed frame is equipped with slide rails on both the left and right sides, and a fixed-length rod is connected between the slide rails.
5. The packaging box rounding corner forming machine according to claim 4, characterized in that, The fixed-length rod is an inverted "U" shape.
6. The packaging box rounding corner forming machine according to claim 5, characterized in that, The fixed-length rod consists of one horizontal bar and two vertical bars, and the vertical bars are slidably connected to the slide rail by means of grooves.
7. The packaging box rounding corner forming machine according to claim 6, characterized in that, The top of the vertical rod is marked with graduations.