Edge folding device for heavy packaging film

Abstract

The utility model relates to an edge folding device for a heavy packaging film. The edge folding device comprises a frame body and an edge folding structure, a film cylinder passes through the multiple longitudinal rollers on the two sides of the upper end of the frame body, the film cylinder is limited, then the film cylinder passes through the first edge folding wheel, an indentation at the edge folding position is pressed, then the indentation is further pressed down through the second edge folding wheel, and finally when the film cylinder passes through the third edge folding wheel, an M-shaped folded edge is pressed through the third edge folding wheel. In the folding process of the two sides of the film cylinder, when the folding depth needs to be adjusted, the first folding wheel can be driven by the first driving part to move towards the inside or outside of the frame body, the second folding wheel can be driven by the second driving part to move towards the inside or outside of the frame body, the third folding wheel can be driven by the third driving part to move towards the inside or outside of the frame body, and the pressure applied to the film cylinder is adjusted. In this way, the edge folding depth can be adjusted according to needs, and great convenience is achieved.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag production technology, specifically to a folding device for re-wrapping film. Background Technology

[0002] The production process of heavy-duty bags includes film blowing, printing, embossing, folding, and bag making. The folding process involves folding the sides of the film tube (bag) to form an M-shaped fold, which reduces the area occupied when the bag is laid flat, making it more convenient for subsequent transportation and use.

[0003] However, the existing folding device gradually completes the folding of the side of the membrane tube by using three folding wheels arranged sequentially from top to bottom. Since the three folding wheels arranged sequentially from top to bottom are fixed, they can only complete the M-shaped folding at the corresponding depth. The depth of the M-shaped folding cannot be adjusted according to production needs, which is very inconvenient. Utility Model Content

[0004] Therefore, this utility model provides a folding device for re-wrapping film, which solves the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides a folding device for re-wrapping film, including a frame and a folding structure;

[0006] Multiple longitudinal rollers are respectively provided on both sides of the upper end of the frame;

[0007] The folding structure is installed inside the frame and includes a first folding component, a second folding component, and a third folding component. Each of the first, second, and third folding components consists of two sets arranged opposite to each other. The first, second, and third folding components are arranged sequentially from top to bottom. Each set of the first folding components includes a first driving member and a first folding wheel, with the first driving member driving the first folding wheel to move. Each set of the second folding components includes a second driving member and a second folding wheel, with the second driving member driving the second folding wheel to move. Each set of the third folding components includes a third driving member and a third folding wheel, with the third driving member driving the third folding wheel to move.

[0008] The aforementioned beneficial effects are as follows: the membrane tube passes between multiple longitudinal rollers on both sides of the upper end of the frame, which limit the movement of the membrane tube. Then, it passes through the first folding wheel, which presses out an indentation at the folding position. After that, the second folding wheel presses the indentation further down. Finally, when it passes through the third folding wheel, the third folding wheel presses out an M-shaped fold. In this process of folding the membrane tube on both sides, when it is necessary to adjust the folding depth, the first driving component drives the first folding wheel to move inward or outward from the frame, the second driving component drives the second folding wheel to move inward or outward from the frame, and the third driving component drives the third folding wheel to move inward or outward from the frame. This adjusts the pressure applied to the membrane tube, thus allowing for convenient adjustment of the folding depth as needed.

[0009] In addition, the first, second, and third folding wheels can all be adjusted individually. This allows for more precise adjustments when folding the sides of the membrane tube, especially when the thickness or material is different, resulting in better folding quality and a more aesthetically pleasing finish.

[0010] In a preferred embodiment, a plurality of first transverse rollers are respectively provided on both sides of the two first folding wheels, a second transverse roller is respectively provided on both sides of the two second folding wheels, and a third transverse roller is respectively provided on both sides of the two third folding wheels.

[0011] In a preferred embodiment, the first driving component includes a first lead screw, a first moving block, and a first driving rod. The first lead screw is disposed in a first groove on the frame, the first moving block is disposed on the first lead screw, the first driving rod is disposed on the first moving block, and a first U-shaped frame is disposed at the inner end of the first driving rod, with the first folding wheel disposed inside the first U-shaped frame.

[0012] In a preferred embodiment, the second driving component includes a second lead screw, a second moving block, and a second driving rod. The second lead screw is disposed in a second groove on the frame, the second moving block is disposed on the second lead screw, the second driving rod is disposed on the second moving block, and a second U-shaped frame is disposed at the inner end of the second driving rod, with the second folding wheel disposed inside the second U-shaped frame.

[0013] In a preferred embodiment, the third driving component includes a third lead screw, a third moving block, and a third driving rod. The third lead screw is disposed in a third groove on the frame, the third moving block is disposed on the third lead screw, the third driving rod is disposed on the third moving block, and a third U-shaped frame is disposed at the inner end of the third driving rod, with the third folding wheel disposed within the third U-shaped frame.

[0014] In a preferred embodiment, the first U-shaped frame, the second U-shaped frame, and the third U-shaped frame are detachably connected. The inner ends of the first driving rod, the second driving rod, and the third driving rod are each provided with two ear plates. The outer ends of the first U-shaped frame, the second U-shaped frame, and the third U-shaped frame are each provided with a connecting block. The two ear plates are each provided with an insertion hole, and the connecting block is provided with a connecting hole. The insertion hole and the connecting hole cooperate with each other.

[0015] In a preferred embodiment, the diameter of the first folding wheel is smaller than that of the second folding wheel, and the diameter of the second folding wheel is smaller than that of the third folding wheel. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of a folding device for re-wrapping film according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a folding device for re-wrapping film according to the present invention, including a side sectional view and a plan view.

[0019] Figure 3 This is a partial structural schematic diagram of a folding device for re-wrapping film according to the present invention;

[0020] Figure 4 This is a partial exploded view of the folding device for re-wrapping film according to this utility model.

[0021] In the diagram: 10. Frame; 11. Longitudinal roller; 20. Folding structure; 30. First folding assembly; 40. Second folding assembly; 50. Third folding assembly; 310. First driving component; 31. First folding wheel; 410. Second driving component; 41. Second folding wheel; 510. Third driving component; 51. Third folding wheel; 61. First transverse roller; 62. Second transverse roller; 63. Third transverse roller; 311. First lead screw; 312. First moving... 313. Moving block; 314. First driving rod; 315. First U-shaped frame; 411. Second lead screw; 412. Second moving block; 413. Second driving rod; 414. Second groove; 415. Second U-shaped frame; 511. Third lead screw; 512. Third moving block; 513. Third driving rod; 514. Third groove; 515. Third U-shaped frame; 91. Ear plate; 92. Connecting block; 93. Insertion hole; 94. Connecting hole. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] like Figures 1 to 4 As shown, this utility model provides a folding device for re-wrapping film, including a frame 10 and a folding structure 20;

[0024] Multiple longitudinal rollers 11 are respectively provided on both sides of the upper end of the frame 10;

[0025] The folding structure 20 is disposed within the frame 10. The folding structure 20 includes a first folding component 30, a second folding component 40, and a third folding component 50. Each of the first folding component 30, the second folding component 40, and the third folding component 50 consists of two sets arranged opposite to each other. The first folding component 30, the second folding component 40, and the third folding component 50 are arranged sequentially from top to bottom. Each of the two sets of first folding components 30 includes a first driving member 310 and a first folding wheel 31. The first driving member 310 is used to drive the first folding wheel 31 to move. Each of the two sets of second folding components 40 includes a second driving member 410 and a second folding wheel 41. The second driving member 410 is used to drive the second folding wheel 41 to move. Each of the two sets of third folding components 50 includes a third driving member 510 and a third folding wheel 51. The third driving member 510 is used to drive the third folding wheel 51 to move.

[0026] During operation, the membrane tube passes between multiple longitudinal rollers 11 on both sides of the upper end of the frame 10, which limit the movement of the membrane tube. Then, it passes through the first folding wheel 31, which presses out an indentation at the folding position. After that, the second folding wheel 41 presses the indentation further down. Finally, when it passes through the third folding wheel 51, the third folding wheel 51 presses out an M-shaped fold. In this process of folding the membrane tube on both sides, when it is necessary to adjust the folding depth, the first driving member 310 drives the first folding wheel 31 to move inward or outward of the frame 10, the second driving member 410 drives the second folding wheel 41 to move inward or outward of the frame 10, and the third driving member 510 drives the third folding wheel 51 to move inward or outward, thereby adjusting the pressure applied to the membrane tube. This allows for convenient adjustment of the folding depth as needed.

[0027] In addition, the first folding wheel 31, the second folding wheel 41, and the third folding wheel 51 can all be adjusted individually. This allows for more precise adjustment when folding the two sides of the membrane tube, especially when the thickness or material is different, resulting in better folding quality and a more aesthetically pleasing finish.

[0028] Preferably, a plurality of first transverse rollers 61 are respectively provided on both sides of the two first folding rollers 31, a second transverse roller 62 is respectively provided on both sides of the two second folding rollers 41, and a third transverse roller 63 is respectively provided on both sides of the two third folding rollers 51.

[0029] The function of the transverse roller is to limit the film tube, which makes it easier for the folding wheel to fold the edge.

[0030] Preferably, the first driving member 310 includes a first lead screw 311, a first moving block 312, and a first driving rod 313. The first lead screw 311 is disposed in a first groove 314 on the frame 10, the first moving block 312 is disposed on the first lead screw 311, the first driving rod 313 is disposed on the first moving block 312, and a first U-shaped frame 315 is disposed at the inner end of the first driving rod 313. The first folding wheel 31 is disposed in the first U-shaped frame 315.

[0031] The first motor drives the first lead screw 311 to rotate by reversing forward and reverse, which causes the first moving block 312 to move inward or outward along the first groove 314 and drive the first driving rod 313 to move inward or outward through the first U-shaped frame 315.

[0032] Preferably, the second driving member 410 includes a second lead screw 411, a second moving block 412, and a second driving rod 413. The second lead screw 411 is disposed in a second groove 414 on the frame 10. The second moving block 412 is disposed on the second lead screw 411. The second driving rod 413 is disposed on the second moving block 412. A second U-shaped frame 415 is disposed at the inner end of the second driving rod 413. The second folding wheel 41 is disposed inside the second U-shaped frame 415.

[0033] The second motor drives the second lead screw 411 to rotate by reversing forward and reverse, which causes the second moving block 412 to move inward or outward along the second groove 414 and drive the second driving rod 413. The second driving rod 413 drives the second folding wheel 41 to move inward or outward through the second U-shaped frame 415.

[0034] Preferably, the third driving component 510 includes a third lead screw 511, a third moving block 512, and a third driving rod 513. The third lead screw 511 is disposed in a third groove 514 on the frame 10, the third moving block 512 is disposed on the third lead screw 511, and the third driving rod 513 is disposed on the third moving block 512. The inner end of the third driving rod 513 is provided with a third U-shaped frame 515, and the third folding wheel 51 is disposed in the third U-shaped frame 515.

[0035] The third motor drives the third lead screw 511 to rotate by reversing forward and reverse, which causes the third moving block 512 to move inward or outward along the third groove 514 and drive the third driving rod 513. The third driving rod 513 drives the third folding wheel 51 to move inward or outward through the third U-shaped frame 515.

[0036] Preferably, the first U-shaped frame 315, the second U-shaped frame 415, and the third U-shaped frame 515 are detachably connected. The inner ends of the first driving rod 313, the second driving rod 413, and the third driving rod 513 are respectively provided with two ear plates 91. The outer ends of the first U-shaped frame 315, the second U-shaped frame 415, and the third U-shaped frame 515 are respectively provided with connecting blocks 92. The two ear plates 91 are respectively provided with insertion holes 93, and the connecting blocks 92 are provided with connecting holes 94. The insertion holes 93 and the connecting holes 94 cooperate with each other.

[0037] When it is necessary to disassemble and replace a certain folding wheel, the corresponding folding wheel is moved outward by the drive component. At this time, the operator can unscrew the nut 98 from the bolt 97, and the bolt 97 is moved out of the insertion hole 93 and the connecting hole 94, so that the connecting block 92 is moved out between the two ear plates 91, and the corresponding folding wheel is replaced. Then, the connecting block 92 on the new folding wheel is moved into the two ear plates 91, and then the bolt is inserted into the insertion hole 93 and the connecting hole 94. The nut 98 is then screwed on the bolt 97 to complete the replacement of the folding wheel. In this way, the replacement of a certain folding wheel can be completed very conveniently.

[0038] Preferably, the diameter of the first folding wheel 31 is smaller than that of the second folding wheel 41, and the diameter of the second folding wheel 41 is smaller than that of the third folding wheel 51.

[0039] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A folding device for re-capping, characterized in that, The utility model relates to a kind of paper folding machine, including: Frame body (10), a plurality of longitudinal rollers (11) are respectively arranged in the upper end of the frame body (10) on both sides; Folding structure (20), the folding structure (20) is arranged in frame body (10), and the folding structure (20) includes first folding assembly (30), second folding assembly (40) and third folding assembly (50), the first folding assembly (30), second folding assembly (40) and third folding assembly (50) are two groups and oppositely arranged, the first folding assembly (30), second folding assembly (40) and third folding assembly (50) are sequentially arranged from top to bottom, two groups of the first folding assembly (30) include first driving part (310) and first folding wheel (31), the first driving part (310) is used to drive first folding wheel (31) to move, two groups of the second folding assembly (40) include second driving part (410) and second folding wheel (41), and the second driving part (410) is used to drive second folding wheel (41) to move, two groups of the third folding assembly (50) include third driving part (510) and third folding wheel (51), and the third driving part (510) is used to drive third folding wheel (51) to move.

2. The folding device for re-coating according to claim 1, characterized in that, The positions of the two first folding wheels (31) on both sides are respectively provided with a plurality of first transverse rollers (61), the positions of the two second folding wheels (41) on both sides are respectively provided with second transverse rollers (62), and the positions of the two third folding wheels (51) on both sides are respectively provided with third transverse rollers (63).

3. The device for folding the edges of a re-coating according to claim 1, characterized in that, The first driving part (310) includes first lead screw (311), first moving block (312) and first driving rod (313), the first lead screw (311) is arranged in the first recess (314) on frame body (10), the first moving block (312) is arranged on the first lead screw (311), the first driving rod (313) is arranged on the first moving block (312), the inner end of the first driving rod (313) is provided with first U-shaped frame (315), and the first folding wheel (31) is arranged in the first U-shaped frame (315).

4. The device for folding the edges of a re-coating according to claim 1, characterized in that, The second driving part (410) includes second lead screw (411), second moving block (412) and second driving rod (413), the second lead screw (411) is arranged in the second recess (414) on frame body (10), the second moving block (412) is arranged on the second lead screw (411), the second driving rod (413) is arranged on the second moving block (412), the inner end of the second driving rod (413) is provided with second U-shaped frame (415), and the second folding wheel (41) is arranged in the second U-shaped frame (415).

5. The device for folding the edges of a re-film according to claim 1, characterized in that, The third driving member (510) comprises a third screw rod (511), a third moving block (512) and a third driving rod (513), the third screw rod (511) is arranged in a third groove (514) on the frame body (10), the third moving block (512) is arranged on the third screw rod (511), the third driving rod (513) is arranged on the third moving block (512), and the inner end of the third driving rod (513) is provided with a third U-shaped frame (515), and the third U-shaped frame (515) is provided with the third folding wheel (51).

6. The device for folding the edges of a re-film according to claim 3, characterized in that, The first U-shaped frame (315), the second U-shaped frame (415) and the third U-shaped frame (515) are detachably connected, the inner ends of the first driving rod (313), the second driving rod (413) and the third driving rod (513) are respectively provided with two ear plates (91), the outer ends of the first U-shaped frame (315), the second U-shaped frame (415) and the third U-shaped frame (515) are respectively provided with connecting blocks (92), the two ear plates (91) are respectively provided with insertion holes (93), and the connecting blocks (92) are provided with connecting holes (94); the insertion holes (93) and the connecting holes (94) are matched.

7. The device for folding the edges of a re-film according to claim 1, characterized in that, The diameter of the first folding wheel (31) is smaller than that of the second folding wheel (41), and the diameter of the second folding wheel (41) is smaller than that of the third folding wheel (51).

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