Sheet material limiting mechanism for forming side face middle sealing type bag body

Abstract

The utility model relates to the field of bag body processing equipment, and discloses a sheet stock limiting mechanism for side face middle sealing type bag body forming, which comprises a lifting die and a sheet stock bearing platform, and a forming channel for the lifting die to extend into from top to bottom is arranged in the middle of the sheet stock bearing platform; the sheet material limiting mechanism comprises an upper pressing wheel and a lower guiding piece, an arc-shaped guiding face used for bending the sheet material from the horizontal direction to the vertical direction is always arranged above the side, facing the forming channel, of the lower guiding piece, the side portion of the lower guiding piece is matched with the side face of the lifting mold to be used for vertically limiting the sheet material, and the bottom end of the arc-shaped guiding face is tangent to the vertical face; gluing devices are arranged on the front side and the rear side of the side edge of the forming channel correspondingly. Through rolling friction limiting and accurate guiding, the problem that a traditional brush scratches sheet materials is solved, meanwhile, efficient cooperation of folding and gluing is achieved, and the production quality and efficiency of bag bodies are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of bag processing equipment, and in particular to a sheet material limiting mechanism for side-sealed bag forming. Background Technology

[0002] In modern life, packaging bags are often mass-produced using mechanical equipment. These bags include paper bags, non-woven fabric bags, or bags made of other materials. Existing packaging bag production equipment requires specialized forming molds to press down and form the sheet material. In the forming process of side-sealed bags, the bag body needs to be folded into a U-shape on both sides, requiring specialized molds that extend into the bag body. For example, Chinese utility model patent CN212353094U, entitled "An Adjustable Mold for Three-Dimensional Bag Forming and a Three-Dimensional Bag Forming Machine," discloses an adjustable mold for three-dimensional bag forming, including an inner mounting plate with side plates connected to both sides. The side plates can slide left and right relative to the inner mounting plate and are detachable and replaceable. For side-sealed bags, the specific process involves pre-applying adhesive to the overlapping edges of the sheet material, then pressing down the mold to fold the front and back sides of the bag body upwards relative to the mold. The side folding plates then fold the left and right sides towards the center, and the adhesive overlaps and bonds the bags together.

[0003] During the production of the bag body, the overlapping joints of the folded sheet material need to be glued. In the production of side-sealed bags, the sheet material needs to undergo processes such as folding, gluing, and pressing. In traditional technology, the folding and turning of the sheet material is often guided by a brush. However, the brush is prone to sliding friction when in contact with the sheet material, resulting in scratches on the surface and affecting the aesthetics. In addition, the existing gluing device and limiting mechanism are not well coordinated, and the brush is easily affected by the external environment, resulting in insufficient stability and uneven glue application. Therefore, there is an urgent need for a sheet material limiting mechanism that can accurately limit movement, reduce friction damage, and efficiently coordinate with the gluing process. Summary of the Invention

[0004] This utility model addresses the shortcomings of existing technologies by providing a sheet material limiting mechanism for side-sealed bag forming.

[0005] To solve the above-mentioned technical problems, this utility model achieves its solution through the following technical solution:

[0006] The sheet material limiting mechanism for side-sealed bag forming includes: a lifting mold and a sheet material carrying platform. The lifting mold is connected to a mold power source that drives its lifting and lowering, used for pressing and forming the sheet material. The sheet material carrying platform is used to lay the sheet material flat, and a forming channel is opened in the middle of the sheet material carrying platform for the lifting mold to extend from top to bottom. The sheet material limiting mechanism includes an upper pressure roller and a lower guide component. The upper pressure roller is located above the sheet material carrying platform, and the lower guide component is located at the junction of the sheet material carrying platform and the forming channel. The upper side of the lower guide component facing the forming channel always has an arc-shaped guiding surface for the sheet material to bend from horizontal to vertical. The side of the lower guide component cooperates with the side of the lifting mold to form a vertical limit on the sheet material. The bottom end of the arc-shaped guiding surface is tangent to the vertical surface. Glue-applying devices are respectively provided on the front and rear sides of the forming channel. The glue-applying devices include glue heads, which face the forming channel laterally inward and are located below the lower guide component. The function of the upper pressure roller and the lower guide component is to guide the sheet material into the forming channel along a specific trajectory, forming a limit. The upper pressure rollers can be one or more. The lower guide and the lifting mold form a vertical limit on the sheet material, preventing it from shifting and ensuring accurate glue application. The arc-shaped guide surface guides the horizontal part of the sheet material to form an arc-shaped connection with the vertical part pressed down by the mold, preventing creases. After the sheet material is pressed into the forming channel by the lifting mold, its inner surface is in contact with the lifting mold, and its outer surface is tangent to the lower guide. This allows for smooth glue application on the outer side of the sheet material while maintaining a vertical position, ensuring stable glue application without skewing. The glue application area corresponding to the glue application device should overlap and bond with the other side to achieve a center seal. The other side of the sheet material overlaps the glue application area outside the glue application device, so that the overlap line is located in the middle of the bag body, almost coinciding with the center fold line on the side of the bag body, which is beneficial to the aesthetics of the bag body.

[0007] Preferably, the top of the arc-shaped guide surface and the bottom of the upper pressure roller form a horizontal limit on the sheet material.

[0008] Preferably, the lower guide is elongated, with an arc-shaped guide surface on its upper surface and a vertical surface on its inner side.

[0009] Preferably, the lower guide is a circular roller, allowing the upper pressure roller and the lower guide to rotate in opposite directions. The function of the upper pressure roller and the lower guide is to guide the sheet material along a specific trajectory into the forming channel, forming a limiting position. Furthermore, they exhibit rolling friction with the sheet material, preventing scratches caused by relative sliding. This further solves the problem that long, strip-shaped guide plates may cause sheet material displacement or wrinkling due to high frictional resistance.

[0010] Preferably, the upper pressure roller is located directly above the sheet material carrying platform, so that the sheet material is flattened between the sheet material carrying platform and the upper pressure roller.

[0011] Preferably, the glue applicator includes a mounting base located inside the sheet material carrying platform.

[0012] Preferably, the glue applicator sprays glue onto the bag body.

[0013] This utility model, by adopting the above technical solution, has significant technical effects:

[0014] This invention uses an arc-shaped guide surface that works in conjunction with the side wall of the lifting mold to form a dual horizontal and vertical limit, ensuring the folding accuracy of the sheet material.

[0015] By using rolling friction limiting and precise guidance, the problem of traditional brushes scratching sheet materials is solved, while achieving efficient synergy between folding and gluing, significantly improving the quality and efficiency of bag production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 yes Figure 1 A magnified view of part A in the image;

[0018] Figure 3 yes Figure 1 A magnified view of part B in the image;

[0019] Figure 4 This is a schematic diagram of the structure when the lifting mold is located above the sheet material.

[0020] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Lifting mold; 11. Mold power source; 21. Upper pressure roller; 22. Lower guide component; 23. Lower guide component; 3. Sheet material carrying platform; 4. Forming channel; 5. Upper glue applicator; 6. Sheet material; 7. Glue applicator; 71. Glue head; 8. Mounting bracket; 81. Crossbeam; 82. Moving guide rail; 83. Slider; 84. Lateral movement power source. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Example 1

[0023] The sheet material limiting mechanism for side-sealed bag forming, such as Figure 1-4As shown, it includes: a sheet material limiting mechanism for side-sealed bag forming, including: a lifting mold 1 and a sheet material carrying platform 3. The lifting mold 1 is connected to a mold power source 11 that drives its lifting and lowering, and is used to press the sheet material 6 downward to form it; the sheet material carrying platform 3 is used to lay the sheet material 6 flat, and a forming channel 4 is opened in the middle of the sheet material carrying platform 3 for the lifting mold 1 to extend from top to bottom; the sheet material limiting mechanism includes an upper pressure roller 21 and a lower guide member 22, wherein the upper pressure roller 21 is located above the sheet material carrying platform 3, and the lower guide member 22 is located at the junction of the sheet material carrying platform 3 and the forming channel 4. The upper side of the lower guide member 22 facing the forming channel 4 always has an arc-shaped guide surface 221 for the sheet material 6 to bend from horizontal to vertical. The side of the lower guide member 22 cooperates with the side of the lifting mold 1 to form a vertical limit on the sheet material 6, and the bottom end of the arc-shaped guide surface 221 is tangent to the vertical surface; glue application devices 7 are respectively provided on the front and rear sides of the side of the forming channel 4. The glue application device 7 includes a glue head 71, which is horizontally inward facing the forming channel 4 and is located below the lower guide member 22. The function of the upper pressure roller and the lower guide is to guide the sheet material into the forming channel along a specific trajectory, forming a limiting position. There can be one or more upper pressure rollers. The lower guide and the lifting mold form a vertical limit on the sheet material, preventing it from shifting and ensuring accurate glue application. The arc-shaped guide surface guides the horizontal part of the sheet material to form an arc-shaped connection with the vertical part pressed down by the mold, preventing creases. After the sheet material is pressed into the forming channel 4 by the lifting mold 1, its inner surface is in contact with the lifting mold 1, and its outer surface is tangent to the lower guide 22. This allows for smooth vertical glue application on the outer side of the sheet material, ensuring stable glue application without skewing. The glue application area corresponding to the glue application device should overlap and bond with the other side to achieve a center seal. The other side of the sheet material overlaps the glue application area outside the glue application device, so that the overlap line is located in the middle of the bag body, almost coinciding with the center fold line of the bag body, which is beneficial to the bag's aesthetics. When the sheet material 6 moves to the lower guide member 22, it naturally bends along the arc-shaped guide surface 221. The top end forms a horizontal limit with the bottom of the upper pressure roller 21, and the bottom end forms a vertical limit with the side of the lifting mold 1, ensuring accurate folding angle.

[0024] The top of the arc-shaped guide surface 221 and the bottom of the upper pressure roller 21 form a horizontal limit on the sheet material 6. The lower guide member 23 has an arc-shaped guide surface for the sheet material 6 from horizontal to vertical, so that the bending and turning part of the sheet material is attached to the outside of the arc-shaped guide surface 221, and its bending trajectory is fixed.

[0025] As one implementation method, such as Figure 3 As shown, the lower guide member 22 is elongated, with an arc-shaped guide surface 221 on its upper surface and a vertical surface on its inner side.

[0026] As another implementation method, such as Figure 2As shown, the lower guide 22 is a circular roller, allowing the upper pressure roller 21 and the lower guide 22 to rotate in opposite directions. The function of the upper pressure roller and the lower guide 22 is to guide the sheet material into the forming channel along a specific trajectory, forming a limit, and the rolling friction between them and the sheet material avoids scratches caused by relative sliding. This further solves the problem that long strip guide plates may cause sheet material displacement or wrinkling due to high frictional resistance.

[0027] The upper pressure roller 21 is located directly above the sheet material carrying platform 3, so that the sheet material 6 is flattened between the sheet material carrying platform 3 and the upper pressure roller 21.

[0028] The glue applicator 7 includes a mounting base 72, which is located inside the sheet material carrying platform 3.

[0029] The power source for the mold 11 can be a cylinder, a motor screw, a motor belt, or other commonly used components by those in the field.

[0030] The sheet folding section is provided with an upper pressure roller 21 and a lower guide member 22. The upper surface of the lower guide member 22 has an arc-shaped transition surface between it and the side near the forming channel 4.

[0031] When the lifting mold 1 descends, the lifting mold 1 and the inner side of the lower guide 23 form a vertical limit on the sheet material 6, and the top of the lower guide 23 and the bottom of the upper pressure roller 21 form a horizontal limit on the sheet material 6.

[0032] The upper pressure roller 21 includes an upper pressure roller that flattens the front part of the bag corresponding to the sheet material, and an upper pressure roller that flattens the side part of the bag or the part where the front and side meet; the upper pressure roller 21 avoids the part of the sheet material 6 that needs to be glued.

[0033] The glue applicator sprays glue onto the bag body in seven pairs. The glue can be cold glue, hot melt glue, or other glues commonly used by those in the field.

[0034] Working principle: Combining Figure 1-3 The sheet material 6 is conveyed or directly laid flat on the sheet material carrying platform 3. The lifting mold 1, driven by the mold power source 11, starts to descend, contacting the sheet material and accelerating its descent. During the movement, the sheet material is pressed into the forming channel 4 by the lifting mold 1, forming a U-shaped, sealed bag shape. The glue nozzles 71 of the front and rear glue applicators 7 spray glue into the inside of the forming channel 4, with the glue nozzle height lower than the platform surface, ensuring that the cold glue only adheres to the inside of the sheet material. The sheet material changes from horizontal to vertical through the arc-shaped guide surface of the lower guide 23, and the upper pressure roller 21 flattens the front and sides of the bag, ensuring folding accuracy.

[0035] In the description of this utility model, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A sheet material limiting mechanism for side-sealed bag forming, characterized in that, include: The lifting mold (1) is connected to a mold power source (11) that drives it to rise and fall, and is used to press the sheet material (6) down to form it; The sheet material carrying platform (3) is used to lay the sheet material (6) flat. The sheet material carrying platform (3) has a forming channel (4) in the middle for the lifting mold (1) to extend from top to bottom. The sheet material limiting mechanism includes an upper pressure roller (21) and a lower guide (22). The upper pressure roller (21) is located above the sheet material carrying platform (3), and the lower guide (22) is located at the junction of the sheet material carrying platform (3) and the forming channel (4). The lower guide (22) always has an arc-shaped guide surface (221) on the side facing the forming channel (4) for bending the sheet material (6) from horizontal to vertical. The side of the lower guide (22) cooperates with the side of the lifting mold (1) to form a vertical limit on the sheet material (6). The bottom end of the arc-shaped guide surface (221) is tangent to the vertical surface. A glue applicator (7) is provided on the front and back sides of the molding channel (4). The glue applicator (7) includes a glue head (71). The glue head (71) is horizontally inward and directly facing the molding channel (4). The glue head (71) is located below the lower guide (22).

2. The sheet material limiting mechanism for side-sealed bag forming according to claim 1, characterized in that: The top of the arc-shaped guide surface (221) and the bottom of the upper pressure roller (21) form a horizontal limit on the sheet material (6).

3. The sheet material limiting mechanism for side-sealed bag forming according to claim 1, characterized in that: The lower guide (22) is long and narrow. The upper surface of the lower guide (22) has an arc-shaped guide surface (221), and the inner surface is a vertical surface.

4. The sheet material limiting mechanism for side-sealed bag forming according to claim 1, characterized in that: The lower guide (22) is a circular roller, which allows the upper pressure roller (21) and the lower guide (22) to rotate in opposite directions.

5. The sheet material limiting mechanism for side-sealed bag forming according to claim 1, characterized in that: The upper pressure roller (21) is located directly above the sheet material carrying platform (3), so that the sheet material (6) is flattened between the sheet material carrying platform (3) and the upper pressure roller (21).

6. The sheet material limiting mechanism for side-sealed bag forming according to claim 1, characterized in that: The glue applicator (7) includes a mounting base (72) located inside the sheet material carrying platform (3).

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