Dual-path folding line indentation mechanism

Abstract

This utility model discloses a dual-path folding line creasing mechanism, including a traveling carriage fixed on the traveling belt of a creasing machine; a rotating motor fixedly mounted on the traveling carriage; an L-shaped fixing frame fixedly mounted on the traveling carriage corresponding to the output end of the rotating motor; a deflectable creasing knife mounted on the L-shaped fixing frame; a connecting rod connecting the creasing knife and the output end of the rotating motor; a creasing cam rotatably connected to the lower surface of the creasing knife; and a voice coil motor fixedly mounted on the traveling carriage. Theoretically, based on the material and thickness of the cardboard, the ideal creasing line is offset to each side by a new fold line. The creasing cam performs creasing along the two new fold lines respectively. Because the two creasing lines are separated by a certain distance, the bending radius increases during folding, improving the folding stress of the paper or cardboard, thereby improving the folding quality and preventing brittleness during folding, which would affect the external aesthetics of the packaging box.

Description

Technical Field

[0001] This utility model belongs to the field of cardboard crease technology, specifically, it relates to a dual-path crease line creasing mechanism. Background Technology

[0002] Paper packaging boxes are containers made primarily of paper or cardboard, and are widely used in product packaging, transportation, and gifts. Their characteristics include being lightweight, environmentally friendly (recyclable and biodegradable), low-cost, and allowing for personalized appearances through printing and design.

[0003] Packaging box creasing is a process of pressing crease lines onto cardboard to ensure that the packaging box can be folded and formed precisely. This not only improves the efficiency of automated production and structural stability, but also avoids deviations or material waste caused by manual operation. At the same time, the clear creasing design optimizes the user experience, making opening and assembly easier, and supports the precise positioning of complex shapes and printed patterns. It reduces production costs while improving aesthetics, ultimately achieving a balance between packaging functionality and visual appeal.

[0004] The cam-type single-sided creasing and cutting technology widely used in current packaging box folding and creasing processes forms V-shaped creasing grooves by linearly rolling and pressing the paper surface through a cam mechanism. However, due to the limitations of the single-pressure process, when the cam acts on the front side of the paper in a rolling and pressing manner, the back side comes into contact with the rigid support platform and undergoes corresponding deformation. This results in an excessively small bending radius during folding, causing stress cracking of the paper / paperboard. Furthermore, because the crease angle formed by a single creasing by the creasing knife exceeds 90°, brittle fracture easily occurs at the crease during folding, severely affecting the appearance quality of the finished product. Utility Model Content

[0005] To address the technical problem in the prior art where the crease of the packaging box is prone to brittle fracture at the fold due to the small bending radius during folding, thus affecting quality and aesthetics, this utility model provides a dual-path fold line crease mechanism.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A dual-path folding line embossing mechanism includes a traveling carriage fixed to the traveling belt of an embossing machine; a rotary motor is fixedly mounted on the traveling carriage; an L-shaped fixing frame is fixedly mounted on the traveling carriage corresponding to the output end of the rotary motor; a deflectable embossing knife is mounted on the L-shaped fixing frame; a connecting rod connects the embossing knife to the output end of the rotary motor; an embossing cam is rotatably connected to the lower surface of the embossing knife; a voice coil motor is also fixedly mounted on the traveling carriage; a spring is also fixedly mounted on the traveling carriage; multiple rotating shafts are rotatably connected to the embossing machine; and multiple rotating rollers are fixedly connected to each rotating shaft.

[0008] Furthermore, the indentation machine includes a horizontally arranged support platform; a plurality of corresponding rotating shafts are rotatably connected to the upper and lower surfaces of the support platform.

[0009] Furthermore, the embossing machine control belt drives the traveling trolley to move horizontally above the support platform along the width direction of the embossing machine.

[0010] Furthermore, the indentation machine is rotatably connected to multiple rotating shafts corresponding to the positions of the upper and lower surfaces of the support platform, and the rotating shafts are synchronously driven by a synchronous belt; multiple rotating rollers are fixedly connected to each rotating shaft.

[0011] Furthermore, the voice coil motor, in conjunction with the L-shaped fixing frame and the creasing knife, drives the creasing cam to move downward, so that it presses on the new crease line on one side of the creasing paper. The rotating shaft, in conjunction with the rotating roller, drives the creasing paper to move horizontally in the length direction of the creasing machine, and the creasing cam rolls on the creasing paper.

[0012] Furthermore, when the voice coil motor loses power, it stops applying downward force to the L-shaped bracket, and the spring pulls the L-shaped bracket upward, returning it to its original position.

[0013] Furthermore, the creasing cam moves to the new crease line on the other side, and the voice coil motor drives the creasing cam to move downward, so that it presses against the new crease line of the creasing paper on that side. The creasing paper moves horizontally in the length direction of the creasing machine, and the creasing cam rolls on the crease line.

[0014] The beneficial effects of this utility model are as follows: Based on the material and thickness of the cardboard, a new crease line is offset to each side of the ideal crease line. The crease cam performs creases along the two new crease lines respectively. Because the two creases are separated by a certain distance, the bending radius increases during folding, which improves the folding stress of the paper or cardboard, thereby improving the crease quality and avoiding brittleness during folding, which would affect the external aesthetics of the packaging box. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the folded state of the creasing paper in the prior art;

[0016] Figure 2 This is a schematic diagram of the folding position of the creasing paper in the prior art;

[0017] Figure 3 This is a schematic diagram of the embossing machine of this utility model;

[0018] Figure 4 This is a schematic diagram of the traveling trolley structure of this utility model;

[0019] Figure 5 This is a cross-sectional view of the present invention;

[0020] Figure 6 This is a schematic diagram of the indentation cam structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the folded state of the indentation paper in this utility model;

[0022] Figure 8 This is a schematic diagram of the folding position of the indentation paper in this utility model;

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Traveling trolley; 2. Rotating motor; 3. L-shaped fixing frame; 4. Connecting rod; 5. Creasing knife; 6. Creasing cam; 7. Creasing paper; 8. Creasing machine; 9. Traveling belt; 10. Supporting platform; 11. Rotating shaft; 12. Rotating roller; 13. Synchronous belt; 14. Ideal Creasing line; 15. Offset Creasing line; 16. Voice coil motor; 17. Spring. Detailed Implementation

[0025] 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.

[0026] Please see Figure 3 As shown, the dual-path folding line creasing mechanism includes a creasing machine 8 and a travel belt 9 mounted on the creasing machine 8. A travel trolley 1 is mounted on the travel belt 9. Under the action of the travel belt 9, the travel trolley 1 moves horizontally above the support platform 10 along the width direction of the creasing machine 8. The creasing machine 8 includes a horizontally mounted support platform 10. The creasing machine 8 is rotatably connected to multiple corresponding rotating shafts 11 at positions corresponding to the upper and lower surfaces of the support platform 10. Multiple rotating rollers 12 are fixedly connected to each rotating shaft 11. The rotating rollers 12, which correspond to each other and are located on the upper and lower surfaces of the support platform 10, abut against each other through the support platform 10. The creasing paper is placed on the support platform 10. The rotating shafts 11, in cooperation with the rotating rollers 12, drive the creasing paper to move horizontally along the length direction of the creasing machine 8. The rotating shafts 11 are mutually transmitted through the cooperation of the synchronous belt 13 and the synchronous pulley. The rotating rollers 12 are driven to rotate by a motor.

[0027] Please refer to it again. Figure 4 - Figure 6As shown, a rotary motor 2 is fixedly installed on the traveling trolley 1; an L-shaped fixing frame 3 is fixedly installed on the traveling trolley 1 at the position corresponding to the output end of the rotary motor 2; a deflectable indentation knife 5 is installed on the L-shaped fixing frame 3; a connecting rod 4 is connected between the indentation knife 5 and the output end of the rotary motor 2, and the rotary motor 2 controls the angle deflection of the indentation knife 5 through the connecting rod 4 to realize reversing indentation; an indentation cam 6 is rotatably connected to the lower surface of the indentation knife 5 via a shaft, and the tip radius of the indentation cam 6 is 0.25-0.45mm.

[0028] Please refer to it again. Figure 4 - Figure 6 As shown, a voice coil motor 16 is also fixedly installed on the traveling trolley 1. The output end of the voice coil motor 16 is connected to the L-shaped fixed frame 3 and is used to drive the L-shaped fixed frame 3 to move downward. A spring 17 is also fixed on the traveling trolley 1. The lower end of the spring 17 is connected to the L-shaped fixed frame 3 and can apply an upward force to the L-shaped fixed frame 3.

[0029] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below:

[0030] Please see Figure 1 and Figure 2 As shown, when the creasing paper 7 is folded at 45° along the ideal creasing line 14, the fold is almost touching. When folded at 55° along the ideal creasing line 14, the fold has already touched. The minimum bending radius of a single creasing fold is 0.93mm. If it continues to be folded along the crease line at this point, stress concentration will occur at the fold on the back of the creasing paper 7, leading to brittleness. Therefore, when using the creasing mechanism to creasing the creasing paper 7, the ideal creasing path (referring to the location of the ideal creasing line 14) is calculated using the creasing 8 preset algorithm, and the width ratio of the ideal creasing path is calculated. Based on the set width ratio, the paper is offset to both sides of the ideal creasing path to complete the processing of the current creasing path on both sides of the ideal creasing path. Figure 8 As shown, specifically, the positions on both sides of the ideal crease line 14 on the crease paper 7 are determined according to the calculated width ratio of the ideal crease path.

[0031] In this embodiment, the offset crease line 15 (new crease line) is offset by 0.8-1.2mm to the left and right of the ideal crease line 14. First, the traveling trolley 1 is offset to one side of the ideal crease line 14 by the traveling belt 9. Then, the voice coil motor 16, together with the L-shaped fixing frame 3 and the crease knife 5, drives the crease cam 6 to move downward, so that it presses on the crease paper. The rotating shaft 11, together with the rotating roller 12, drives the crease paper to move horizontally in the length direction of the crease machine 8, so that the crease cam 6 rolls on the crease paper, thereby completing the crease treatment of the new crease line on one side. After that, the voice coil motor 16 is de-energized, so that it loses the downward force applied to the L-shaped fixing frame 3. The spring 17 applies an upward force to the L-shaped fixing frame 3, so that the L-shaped fixing frame 3 returns to its original position. The same operation is then performed, moving the creasing knife 5 and creasing cam 6 to the new crease line on the other side, and creasing the new crease line on the other side. This not only completes the creasing treatment of the creasing paper 7, but also prevents stress concentration from occurring during folding, which could lead to brittleness. Figure 7 As shown, when the creasing paper 7 is folded at 55°, the minimum bending radius of a single creasing fold is 2.86 mm. The folded parts of the creasing paper 7 are still not touching and there is still a large gap, which can prevent the creasing paper 7 from cracking when folded.

[0032] In summary, the two indentations on both sides of the ideal indentation line 14 are theoretically offset by a new crease line on each side based on the material and thickness of the cardboard, forming an offset indentation line 15. The indentation cam 6 performs indentation along the two new crease lines respectively. Because the two indentations are separated by a certain distance, the bending radius increases during folding, which improves the folding stress of the paper or cardboard, thereby improving the crease quality and preventing brittleness during folding, which would affect the external aesthetics of the packaging box.

[0033] It should be noted that, in this document, terms such as “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 process, method, article, or apparatus.

[0034] 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.

Claims

1. A dual-path folding line embossing mechanism, comprising a traveling carriage (1) fixed on a traveling belt (9) of an embossing machine (8); characterized in that: A rotating motor (2) is fixedly installed on the traveling trolley (1); an L-shaped fixing frame (3) is fixedly installed on the traveling trolley (1) at the position corresponding to the output end of the rotating motor (2); a deflectable indentation knife (5) is installed on the L-shaped fixing frame (3); a connecting rod (4) is connected between the indentation knife (5) and the output end of the rotating motor (2); an indentation cam (6) is rotatably connected to the lower surface of the indentation knife (5). A voice coil motor (16) is also fixedly installed on the traveling trolley (1); a spring (17) is also fixedly installed on the traveling trolley (1); multiple rotating shafts (11) are rotatably connected to the indentation machine (8); multiple rotating rollers (12) are fixedly connected to each rotating shaft (11).

2. The dual-path folding line indentation mechanism according to claim 1, characterized in that: The indentation machine (8) includes a horizontally arranged support platform (10); a plurality of one-to-one corresponding rotating shafts (11) are rotatably connected to the upper and lower surfaces of the support platform (10).

3. The dual-path folding line indentation mechanism according to claim 2, characterized in that: The indenter (8) controls the travel belt (9) to drive the travel trolley (1) to move horizontally along the width direction of the indenter (8) above the support platform (10).

4. The dual-path folding line indentation mechanism according to claim 2, characterized in that: The indentation machine (8) is rotatably connected to multiple rotating shafts (11) corresponding to the positions of the upper and lower surfaces of the support platform (10). Each rotating shaft (11) is synchronously driven by a synchronous belt (13). Multiple rotating rollers (12) are fixedly connected to each rotating shaft (11).

5. The dual-path folding line indentation mechanism according to claim 4, characterized in that: The voice coil motor (16), together with the L-shaped fixing frame (3) and the creasing knife (5), drives the creasing cam (6) to move downward, so that it presses on the new crease line on one side of the crease paper. The rotating shaft (11), together with the rotating roller (12), drives the creasing paper to move horizontally in the length direction of the creasing machine (8), and the creasing cam (6) rolls on the crease paper.

6. The dual-path folding line indentation mechanism according to claim 5, characterized in that: The voice coil motor (16) loses power and stops applying downward force to the L-shaped bracket (3). The spring (17) pulls the L-shaped bracket (3) upward and the L-shaped bracket (3) returns to its original position.

7. The dual-path folding line indentation mechanism according to claim 6, characterized in that: The creasing cam (6) moves to the new crease line on the other side, and the voice coil motor (16) drives the creasing cam (6) to move downward so that it presses on the new crease line of the creasing paper (7) on that side. The creasing paper moves horizontally in the length direction of the creasing machine (8), and the creasing cam (6) rolls on the crease line.

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