Bottom three-dimensional compression molding device for packaging bag

Abstract

The invention discloses a bottom three-dimensional compression molding device for a packaging bag, and relates to the technical field of packaging machinery. The device comprises a rack, a layering mechanism and a mold pressing mechanism, the device is characterized in that a first material guide roller pair and a second material guide roller pair are fixed to the position, in the feeding direction and the discharging direction of a bottom three-dimensional compression molding area used for packaging bags, of the rack correspondingly, a layering mechanism is fixed to the position, close to the first material guide roller pair, of the rack, and a compression molding mechanism is fixed to the position, close to the second material guide roller pair, of the rack; the mold pressing mechanism comprises a base, a first pressing wheel and a second pressing wheel, the first pressing wheel, the second pressing wheel and a cleaning assembly are fixed to the base, an air blowing structure is fixed in the first pressing wheel, and the cleaning assembly comprises two winding roller seats, a driving structure and sponge cloth. High-quality and high-cleanliness three-dimensional compression molding of the bottom of the packaging bag is achieved, and good technological adaptability and stability are achieved.

Description

Technical Field

[0001] This invention belongs to the field of packaging machinery technology, and in particular relates to a bottom three-dimensional molding device for packaging bags. Background Technology

[0002] As an important container for daily consumer goods and industrial products, the bottom structure of packaging bags directly affects their standing stability, content support, and appearance. In order to improve the functionality and aesthetics of packaging bags, it is often necessary to perform three-dimensional molding on their bottoms, such as forming a concave boat bottom structure or a specific reinforcing rib structure. This process is usually completed in the packaging bag manufacturing process and has high requirements for the efficiency of the molding equipment and the molding quality.

[0003] Existing technologies include devices for forming or molding packaging bags. For example, Chinese patent document CN113306211B discloses a production process and equipment for three-dimensional file bags, which includes a forming mechanism. This mechanism uses a pressing plate to press down in conjunction with a floating tray and a pusher plate to achieve folding and preliminary shaping of the file bag sheet. This technical solution achieves automated continuous production. However, the core purpose of its molding action is to create folding conditions for subsequent heat sealing. The pressing plate and tray produce a one-time, regional pressing, rather than a continuous, three-dimensional roll forming with a specific cross-sectional shape for the bottom of the packaging bag. For the production of packaging bags that require high precision and high efficiency in completing the three-dimensional bottom forming (such as stand-up pouches and gusseted bottom bags), such devices are not suitable in terms of forming principle. Furthermore, they lack consideration for bag pretreatment (such as layering and flattening) and self-cleaning of forming components during the forming process, making it difficult to guarantee the clarity, consistency, and cleanliness of the bottom three-dimensional molding. In addition, there are some molding machines for packaging bags on the market, but they still have the following drawbacks in actual use: First, before molding, multi-layered composite packaging bags are difficult to separate effectively due to static electricity or excessively tight adhesion. Direct molding can easily lead to uneven molding or even damage. Secondly, traditional molding rollers are prone to accumulating residues from packaging materials after continuous operation, such as undried ink or dust. If not cleaned in time, these residues can contaminate subsequent products, affect their appearance, and potentially cause hygiene problems. Furthermore, existing equipment is poorly adaptable to packaging bags of different sizes and thicknesses, and adjustments are cumbersome, affecting the flexibility and efficiency of the production line.

[0004] To address these issues, we provide a bottom three-dimensional molding apparatus for packaging bags. Summary of the Invention

[0005] The purpose of this invention is to provide a bottom three-dimensional molding device for packaging bags. By setting up a molding mechanism that can finely layer the bag, has a pre-expansion air blowing function and automatic cleaning, it solves the problems of poor bag layering effect, resulting in low molding quality, easy contamination of products by the pressure rollers, and limited equipment adaptability of existing bottom molding devices for packaging bags.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a three-dimensional molding device for the bottom of a packaging bag, comprising a frame, a layering mechanism, and a molding mechanism. A first guide roller and a second guide roller are fixed to the feed and discharge directions of the bottom three-dimensional molding area of ​​the packaging bag on the frame, respectively, to guide the movement of the packaging bag. A layering mechanism is fixed to the frame near the first guide roller to layer the packaging bag. A molding mechanism is fixed to the frame near the second guide roller to perform three-dimensional molding on the bottom of the layered packaging bag. The molding mechanism includes a base, a first pressure roller, and a second pressure roller. The base is fixed with the first pressure roller, the second pressure roller, and a cleaning component. The cleaning component is used to simultaneously clean the first and second pressure rollers. An air blowing structure is fixed inside the first pressure roller. The cleaning component includes two take-up roller seats, a drive structure, and a sponge cloth. The sponge cloth is tensioned between the two take-up roller seats. The drive structure is connected to one of the take-up roller seats and drives it to perform a take-up action.

[0007] The invention is further configured such that the layering mechanism includes a lower partition component and an upper partition component; the lower partition component and the upper partition component are two independently used partition components, each partition component includes a hydraulic rod, a locking bolt and a partition plate, the output shaft of the hydraulic rod is fixed with a locking bolt, the partition plate is connected to the locking bolt through a connecting plate, the connecting plate has a movable groove, and the locking bolt is installed in the movable groove of the corresponding partition plate.

[0008] The present invention is further configured such that the separator includes an arc-shaped guide surface for contacting the packaging bag body, a horizontal connecting surface, and arc-shaped transition surfaces formed by the two side edges. The separator of the lower separator assembly and the separator of the upper separator assembly are mirror images of each other, and the bottom surface of the separator in the lower separator assembly is the arc-shaped guide surface, and the top surface of the separator in the upper separator assembly is the arc-shaped guide surface.

[0009] The invention is further configured such that the hydraulic rods of the lower separator assembly and the upper separator assembly are arranged side by side, and the two hydraulic rods are respectively fixed on both sides of the fixed seat, which is fixed on the frame.

[0010] The invention is further configured such that a lead screw structure is connected to the middle position of the base, the lead screw structure includes a horizontally arranged lead screw and a motor for driving the lead screw to rotate, and guide rods are fixed on both sides of the base. The guide rods are arranged parallel to the lead screw of the lead screw structure, the lead screw of the lead screw structure passes through the middle position of the movable seat and is threaded to it, and the guide rods on both sides pass through both sides of the movable seat and are movably connected to it.

[0011] The invention is further configured such that two servo motors are fixed on the top surface of the movable seat, arranged side by side, and the output ends of the two servo motors are respectively connected to a first locking seat and a second locking seat; the first locking seat includes a first base and a first locking screw, the first locking screw passing through the central hole of the first pressure roller and screwed into the top of the first base; the second locking seat includes a second base and a second locking screw, the second locking screw passing through the central hole of the second pressure roller and screwed into the top of the second base.

[0012] The invention is further configured such that the first pressure roller and the second pressure roller are arranged side by side, and the cleaning component is placed outside the first pressure roller and the second pressure roller.

[0013] The invention is further configured such that an inner groove is formed inside the first pressure roller, and an outer groove is formed outside the inner groove to communicate with the outside; the air blowing structure includes an annular air pipe, a fixed bracket is installed inside the inner groove, the annular air pipe is fixed on the ring frame of the fixed bracket, the support leg of the annular air pipe passes through the annular groove and is fixed on the top surface of the movable seat, a row of evenly distributed arc-shaped air nozzles is fixed on the annular air pipe, an air pump is fixed on the top surface of the movable seat, and the air outlet of the air pump is connected to the air inlet of the annular air pipe through a connecting pipe.

[0014] The present invention is further configured such that the take-up roller seat for feeding is placed on the feed side, and the take-up roller seat for receiving is placed on the discharge side; The bottom of both take-up roller seats is fixed with support columns, and each support column is movably connected to the top surface of the movable seat through a bearing; The support column of the take-up roller seat used for taking up materials is fixed with a toothed ring on its periphery. One side of the take-up roller seat used for taking up materials is equipped with a drive structure, which includes a drive motor. The drive motor is fixed on the top surface of the movable seat. The output shaft of the drive motor is connected to a gear, and the gear meshes with the toothed ring. The sponge cloth roll is wound on the unwinding take-up roller seat, and the outer end of the sponge cloth is wound on the take-up take-up roller seat.

[0015] The present invention has the following beneficial effects: 1. The present invention provides a layering mechanism including a lower dividing component and an upper dividing component. Both components are equipped with dividing plates with curved guide surfaces and are independently driven by hydraulic rods. This design can smoothly and accurately insert into the opening of the packaging bag to achieve physical layering. It effectively avoids scratching the surface of the bag or causing it to deform or tear during the layering process, providing a reliable prerequisite for subsequent high-quality molding.

[0016] 2. This invention integrates an air blowing structure inside the No. 1 pressure roller of the molding mechanism. When the packaging bag enters the No. 1 pressure roller, a uniform and gentle airflow is blown into the bottom area to be molded. This airflow can effectively disperse the slight adhesion between the film of the bag caused by static electricity or vacuum effect, and smooth out the fine wrinkles formed during the conveying process, so that the bag enters the molding area in a flat and separated state, thereby significantly improving the molding accuracy and appearance quality of the bottom three-dimensional molding.

[0017] 3. This invention incorporates a cleaning assembly consisting of two take-up roller seats, a drive structure, and a sponge cloth on the molding mechanism. This ensures that the cleaning surface of the sponge cloth is in continuous contact with the rolling surfaces of the first and second pressure rollers. This design can wipe away pigments, inks, or dust that may have adhered to the pressure rollers during the rolling process in real time. The drive structure automatically rewinds and replaces the soiled sponge cloth section, ensuring that the pressure roller surfaces remain clean. This avoids problems such as blurred molding patterns or product contamination caused by pressure roller contamination, thus guaranteeing the stability of batch production quality.

[0018] 4. The molding mechanism of the present invention drives the movable seat to move horizontally through the screw structure, which can flexibly adjust the distance between a pair of pressure rollers to adapt to packaging bags of different widths. The partition plate of the layering mechanism is connected to the locking bolt through the movable groove, which can realize the fine adjustment of the horizontal position. This multi-position adjustable design greatly enhances the versatility of the device and its adaptability to packaging bags of various specifications. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 This is a schematic diagram of a bottom three-dimensional molding device used for packaging bags.

[0021] Figure 2 This is a schematic diagram of the molding mechanism.

[0022] Figure 3 This is a structural schematic diagram of the No. 1 pressure roller.

[0023] Figure 4 This is a schematic diagram of the exploded structure of the No. 1 pressure roller.

[0024] Figure 5This is a schematic diagram of the air blowing structure after the No. 1 pressure roller is cut open.

[0025] Figure 6 This is a schematic diagram of the air blowing structure.

[0026] Figure 7 This is a structural schematic diagram of the No. 2 pressure roller section.

[0027] Figure 8 This is a schematic diagram of the cleaning component.

[0028] Figure 9 This is a schematic diagram of a layered mechanism.

[0029] The attached diagram lists the components represented by each number as follows: 100. Frame; 110. No. 1 guide roller; 120. No. 2 guide roller; 200. Layering mechanism; 210. Lower separator assembly; 220. Upper separator assembly; 201. Hydraulic rod; 202. Locking bolt; 203. Separator plate; 204. Fixed seat; 300. Molding mechanism; 310. Base; 311. Screw structure; 312. Guide rod; 313. Movable seat; 313A. Servo motor; 313B. No. 1 locking seat; 3131B. No. 1 base; 3132B. No. 1 locking screw; 313C. No. 2 lock Tightening seat; 3131C, No. 2 seat; 3132C, No. 2 locking screw; 320, No. 1 pressure roller; 321, air blowing structure; 3211, fixed bracket; 3212, ring air pipe; 3213, air nozzle; 3214, air pump; 3201, inner groove of the ring; 3202, ring slot; 330, No. 2 pressure roller; 340, cleaning component; 341, take-up roller seat; 342, drive structure; 3421, drive motor; 3422, gear; 3411, support column; 3412, gear ring; 343, sponge cloth; 400, packaging bag body. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9This invention relates to a bottom three-dimensional molding device for packaging bags, comprising a frame 100, a layering mechanism 200, and a molding mechanism 300. A first guide roller 110 and a second guide roller 120 are fixed on the frame 100 at the feeding and discharging directions of the bottom three-dimensional molding area of ​​the packaging bag, respectively, to guide the movement of the packaging bag body 400. A layering mechanism 200 is fixed on the frame 100 near the first guide roller 110 to layer the packaging bag body 400. A molding mechanism 300 is fixed on the frame 100 near the second guide roller 120 to perform three-dimensional molding on the bottom of the layered packaging bag body 400. The molding mechanism 300 includes a base 310, a first pressure roller 320, and a second pressure roller 330.

[0032] Specifically, the layering mechanism 200 includes a lower partition assembly 210 and an upper partition assembly 220. The lower partition assembly 210 and the upper partition assembly 220 are two independently used partition assemblies. Each partition assembly includes a hydraulic rod 201, a locking bolt 202, and a partition plate 203. The output shaft of the hydraulic rod 201 is fixed with the locking bolt 202. The partition plate 203 is connected to the locking bolt 202 through a connecting plate. The connecting plate has a movable groove, and the locking bolt 202 is installed in the movable groove of the corresponding partition plate 203. A lead screw structure 311 is connected to the middle position of the base 310. The lead screw structure 311 includes a horizontally arranged lead screw and a motor that drives the lead screw to rotate. Guide rods 312 are fixed on both sides of the base 310. The guide rods 312 are arranged parallel to the lead screw of the lead screw structure 311. The lead screw of the lead screw structure 311 passes through the middle position of the movable seat 313 and is threaded to it. The guide rods 312 on both sides pass through both sides of the movable seat 313 and are movably connected to it. The top surface of the movable seat 313 is fixed with two servo motors 313A arranged side by side. The output ends of the two servo motors 313A are respectively connected to a first locking seat 313B and a second locking seat 313C. The first locking seat 313B includes a first base 3131B and a first locking screw 3132B. The first locking screw 3132B passes through the center hole of the first pressure roller 320 and is screwed into the top of the first base 3131B. The second locking seat 313C includes a second base 3131C and a second locking screw 3132C. The second locking screw 3132C passes through the center hole of the second pressure roller 330 and is screwed into the top of the second base 3131C.

[0033] Furthermore, the separator 203 includes an arc-shaped guide surface for contacting the packaging bag body 400, a horizontal connecting surface, and arc-shaped transition surfaces formed by the two side edges. The separator 203 of the lower separator assembly 210 and the separator 203 of the upper separator assembly 220 are mirror images of each other, and the bottom surface of the separator 203 in the lower separator assembly 210 is an arc-shaped guide surface, and the top surface of the separator 203 in the upper separator assembly 220 is an arc-shaped guide surface. The hydraulic rods 201 of the lower partition assembly 210 and the hydraulic rods 201 of the upper partition assembly 220 are arranged side by side, and the two hydraulic rods 201 are respectively fixed on both sides of the fixed base 204, which is fixed on the frame 100. The first pressure roller 320 and the second pressure roller 330 are arranged side by side, and the cleaning component 340 is placed outside the first pressure roller 320 and the second pressure roller 330.

[0034] The operation process in this embodiment is as follows: During normal processing, the two servo motors 313A drive the first pressure roller 320 and the second pressure roller 330 connected to them to rotate slowly. When the packaging bag body 400 enters the device from the feeding direction, it is first guided and initially positioned by the first guide roller 110. Subsequently, the packaging bag 400 enters the working area of ​​the layering mechanism 200, which includes a lower dividing component 210 and an upper dividing component 220. The two components are controlled independently and drive the locking bolt 202 through the hydraulic rod 201 to move the dividing plate 203 up and down. The dividing plate 203 is designed with an arc-shaped guide surface, which can be smoothly inserted into the opening of the packaging bag 400 to avoid scratching the surface of the packaging bag 400. The arc-shaped transition surfaces on both sides further ensure that the packaging bag 400 is not torn or deformed during the layering process. After the packaging bag body 400 is divided into upper and lower layers by the partition plate 203, it continues to be conveyed forward to the molding mechanism 300. The first pressure roller 320 and the second pressure roller 330 in the molding mechanism 300 are arranged side by side. Driven by the screw structure 311, the movable seat 313 moves horizontally along the guide rod 312 to adapt to packaging bags of different widths. The No. 1 pressure roller 320 and the No. 2 pressure roller 330 are respectively locked and fixed to the No. 1 base 3131B and the No. 2 base 3131C by their respective No. 1 locking screw 3132B and No. 2 locking screw 3132C, which facilitates disassembly and replacement. The specific adjustments to the horizontal positions of pressure roller 320 (number one) and pressure roller 330 are as follows: The motor drives the lead screw structure 311, which drives the movable seat 313 to move horizontally along the guide rod 312, thereby adjusting the lateral distance between the first pressure roller 320 and the second pressure roller 330 to adapt to packaging bags 400 of different widths. The longitudinal spacing adjustment of the two partition plates 203 in the layered mechanism 200 is as follows: By controlling the hydraulic rods 201 of the lower dividing assembly 210 and the upper dividing assembly 220 respectively, the vertical distance between the two dividing plates 203 can be adjusted to accommodate packaging bag bodies 400 of different thicknesses. The horizontal positions of the two partition plates 203 in the layered mechanism 200 are finely adjusted as follows: The divider plate 203 is connected to the locking bolt 202 through the movable groove on the connecting plate. By turning the corresponding locking bolt 202, the position of the divider plate 203 can be finely adjusted in the horizontal direction to ensure that the divider plate 203 is accurately inserted from the opening of the packaging bag body 400 to the designated position. After layering and positioning are completed, the bottom of the packaging bag body 400 enters the first pressure roller 320 and the second pressure roller 330. Through the pressure and rolling action of the first pressure roller 320 and the second pressure roller 330, the bottom of the packaging bag body 400 is pressed inward to form an inward shape, realizing three-dimensional molding. Finally, it is guided out by the second guide roller 120.

[0035] Example 2, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Based on Example 1, an air blowing structure 321 is fixed inside the No. 1 pressure roller 320. The air blowing structure 321 includes an annular air pipe 3212. A row of evenly distributed arc-shaped air nozzles 3213 are fixed on the annular air pipe 3212. An air pump 3214 is fixed on the top surface of the movable seat 313. The air outlet of the air pump 3214 is connected to the air inlet of the annular air pipe 3212 through a connecting pipe.

[0036] Specifically, the first pressure roller 320 has an inner annular groove 3201 inside, and an annular slot 3202 connecting to the outside is opened on the outside of the inner annular groove 3201; a fixed bracket 3211 is installed inside the inner annular groove 3201, the annular air pipe 3212 is fixed on the annular frame of the fixed bracket 3211, and the support leg of the annular air pipe 3212 passes through the annular slot 3202 and is fixed on the top surface of the movable seat 313.

[0037] Based on Example 1, this example further adds an air blowing structure 321, the operation of which is as follows: the air blowing structure 321 is installed inside the No. 1 pressure roller 320, including an air pipe 3212 and uniformly arranged air nozzles 3213. During normal processing and use, the air pump 3214 is started. When the packaging bag 400 is layered and conveyed to the molding area (i.e., the molding mechanism 300 area), the air pump 3214 generates airflow, which is conveyed through the connecting pipe to the annular air pipe 3212 fixed in the inner annular groove 3201 inside the first pressure roller 320. The airflow enters the annular air pipe 3212 through the connecting pipe and is sprayed out by the air nozzle 3213, forming a uniform and gentle airflow that acts between the two bottom films of the packaging bag 400 that is about to enter the molding area. At this time, the uniform and gentle airflow acts on the bottom area of ​​the packaging bag 400 to be formed, which will help the packaging bag 400 to be pre-expanded and positioned. It can effectively blow away the slight adhesion between the two layers of film at the bottom of the packaging bag 400 caused by static electricity or vacuum effect, and smooth out the fine wrinkles that may be formed during the conveying process, so that the packaging bag 400 enters between the first pressure roller 320 and the second pressure roller 330 in the best initial state of flatness and separation. After the physical separation is completed by the separator 203, the continuous slight airflow helps to maintain the separated state of the packaging bag 400 during the brief process of entering the first pressure roller 320 and the second pressure roller 330, and provides a gentle guiding and supporting effect on the bottom of the packaging bag 400, ensuring that the molding force can be applied accurately and evenly to the target area. In addition, the airflow can blow away dust or foreign objects from the surface of the packaging bag 400; It should be added that the airflow is precisely controlled so that the uniform and gentle airflow is not enough to cause the packaging bag body 400 to shift or move away from the first pressure roller 320 and the second pressure roller 330, nor will it resist or interfere with the molding pressure applied by the first pressure roller 320 and the second pressure roller 330.

[0038] Example 3, please refer to Figure 1 , Figure 2 and Figure 8 Based on Embodiments 1 and 2, a first pressure roller 320, a second pressure roller 330, and a cleaning component 340 are fixed on the base 310. The cleaning component 340 is used to simultaneously clean the first pressure roller 320 and the second pressure roller 330. The cleaning component 340 includes two take-up roller seats 341, a drive structure 342, and a sponge cloth 343. The sponge cloth 343 is tensioned between the two take-up roller seats 341. The drive structure 342 is connected to one of the take-up roller seats 341 and drives it to perform the take-up action.

[0039] Specifically, the take-up roller seat 341 for feeding is placed on the feed side, and the take-up roller seat 341 for taking in is placed on the discharge side; The bottom of each of the two take-up roller seats 341 is fixed with a support column 3411, and each support column 3411 is movably connected to the top surface of the movable seat 313 via a bearing. A toothed ring 3412 is fixed around the support column 3411 of the take-up roller seat 341 used for taking up material. A drive structure 342 is provided on one side of the take-up roller seat 341 used for taking up material. The drive structure 342 includes a drive motor 3421. The drive motor 3421 is fixed on the top surface of the movable seat 313. The output shaft of the drive motor 3421 is connected to a gear 3422. The gear 3422 meshes with the toothed ring 3412.

[0040] Furthermore, the sponge cloth 343 roll is wound on the unloading take-up roller seat 341, and the outer end of the sponge cloth 343 is wound on the take-up take-up roller seat 341.

[0041] Based on Embodiments 1 and 2, this embodiment further integrates a cleaning component 340, the operation of which is as follows: During the molding process, when the No. 1 pressure roller 320 and the No. 2 pressure roller 330 rotate and roll the bottom of the packaging bag, the cleaning surface of the sponge cloth 343 is always in contact with the rolling surface of the No. 1 pressure roller 320 and the No. 2 pressure roller 330. If the No. 1 pressure roller 320 and the No. 2 pressure roller 330 are contaminated with pigments, inks or dust on the surface of the packaging bag, they can be wiped in real time through the sponge cloth 343. After a period of use, the drive motor 3421 starts, and through the meshing of the gear 3422 and the gear ring 3412, it drives the take-up roller seat 341 to rotate and take up the soiled sponge cloth 343 cloth segment. At the same time, a new clean segment is released from the unloading take-up roller seat 341, realizing automatic replacement, keeping the surface of the pressure rollers clean, ensuring that the molded shape is clear and free of pollution, and avoiding residual color or impurities on the surface of the first pressure roller 320 and the second pressure roller 330 from affecting the quality of the next molding.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A bottom three-dimensional molding apparatus for packaging bags, comprising a frame (100), a layering mechanism (200), and a molding mechanism (300); characterized in that: On the frame (100) for the bottom three-dimensional molding area of ​​the packaging bag, a first guide roller (110) and a second guide roller (120) are fixed at the feeding direction and the discharging direction, respectively. A layering mechanism (200) is fixed on the frame (100) near the first guide roller (110), and a molding mechanism (300) is fixed on the frame (100) near the second guide roller (120). The molding mechanism (300) includes a base (310), a first pressure roller (320) and a second pressure roller (330). The first pressure roller (320), the second pressure roller (330) and a cleaning component (340) are fixed on the base (310). An air blowing structure (321) is fixed inside the first pressure roller (320). The cleaning component (340) includes two take-up roller seats (341), a drive structure (342) and a sponge cloth (343). The sponge cloth (343) is tensioned between the two take-up roller seats (341). The drive structure (342) is connected to one of the take-up roller seats (341) and drives it to perform the take-up action.

2. The bottom three-dimensional molding device for packaging bags according to claim 1, characterized in that, The layering mechanism (200) includes a lower partition component (210) and an upper partition component (220). The lower partition assembly (210) and the upper partition assembly (220) are two independently used partition assemblies. The partition assembly includes a hydraulic rod (201), a locking bolt (202), and a partition plate (203). The output shaft of the hydraulic rod (201) is fixed with the locking bolt (202). The partition plate (203) is connected to the locking bolt (202) through a connecting plate. The connecting plate has a movable groove, and the locking bolt (202) is installed in the movable groove of the corresponding partition plate (203).

3. The bottom three-dimensional molding device for packaging bags according to claim 2, characterized in that, The separator (203) includes an arc-shaped guide surface for contacting the packaging bag body (400), a horizontal connecting surface, and an arc-shaped transition surface formed by the two side edges. The separator (203) of the lower separator assembly (210) and the separator (203) of the upper separator assembly (220) are mirror images of each other. The bottom surface of the separator (203) in the lower separator assembly (210) is an arc-shaped guide surface, and the top surface of the separator (203) in the upper separator assembly (220) is an arc-shaped guide surface.

4. The bottom three-dimensional molding device for packaging bags according to claim 3, characterized in that, The hydraulic rods (201) of the lower partition assembly (210) and the hydraulic rods (201) of the upper partition assembly (220) are arranged side by side, and the two hydraulic rods (201) are respectively fixed on both sides of the fixed seat (204), which is fixed on the frame (100).

5. The bottom three-dimensional molding device for packaging bags according to claim 1, characterized in that, A lead screw structure (311) is connected to the middle position of the base (310). The lead screw structure (311) includes a horizontally arranged lead screw and a motor that drives the lead screw to rotate. Guide rods (312) are fixed on both sides of the base (310). The guide rods (312) are arranged parallel to the lead screw of the lead screw structure (311). The lead screw of the lead screw structure (311) passes through the middle position of the movable seat (313) and is threaded to it. The guide rods (312) on both sides pass through both sides of the movable seat (313) and are movably connected to it.

6. The bottom three-dimensional molding device for packaging bags according to claim 5, characterized in that, The top surface of the movable seat (313) is fixed with two servo motors (313A) arranged side by side. The output ends of the two servo motors (313A) are respectively connected to the first locking seat (313B) and the second locking seat (313C). The first locking seat (313B) includes a first base (3131B) and a first locking screw (3132B). The first locking screw (3132B) passes through the center hole of the first pressure roller (320) and is screwed into the top of the first base (3131B). The second locking seat (313C) includes a second base (3131C) and a second locking screw (3132C). The second locking screw (3132C) passes through the center hole of the second pressure roller (330) and is screwed into the top of the second base (3131C).

7. The bottom three-dimensional molding device for packaging bags according to claim 6, characterized in that, The first pressure roller (320) and the second pressure roller (330) are arranged side by side, and the cleaning component (340) is placed outside the first pressure roller (320) and the second pressure roller (330).

8. The bottom three-dimensional molding device for packaging bags according to claim 7, characterized in that, The first pressure roller (320) has an inner annular groove (3201) inside, and an annular groove (3202) connecting to the outside is provided on the outer side of the inner annular groove (3201). The air blowing structure (321) includes an annular air pipe (3212). A fixed bracket (3211) is installed inside the annular groove (3201). The annular air pipe (3212) is fixed on the annular frame of the fixed bracket (3211). The support leg of the annular air pipe (3212) passes through the annular slot (3202) and is fixed on the top surface of the movable seat (313). A row of evenly distributed arc-shaped air nozzles (3213) is fixed on the annular air pipe (3212). An air pump (3214) is fixed on the top surface of the movable seat (313). The air outlet of the air pump (3214) is connected to the air inlet of the annular air pipe (3212) through a connecting pipe.

9. A bottom three-dimensional molding device for packaging bags according to claim 8, characterized in that, The take-up roller seat (341) for feeding is located on the feed side, and the take-up roller seat (341) for taking up is located on the discharge side; The bottom of each of the two take-up roller seats (341) is fixed with a support column (3411), and each of the support columns (3411) is movably connected to the top surface of the movable seat (313) by a bearing; A toothed ring (3412) is fixed around the support column (3411) of the take-up roller seat (341) used for taking up material. A drive structure (342) is provided on one side of the take-up roller seat (341) used for taking up material. The drive structure (342) includes a drive motor (3421). The drive motor (3421) is fixed on the top surface of the movable seat (313). The output shaft of the drive motor (3421) is connected to a gear (3422). The gear (3422) meshes with the toothed ring (3412). The sponge cloth (343) roll is wound on the unloading take-up roller seat (341), and the outer end of the sponge cloth (343) is wound on the take-up roller seat (341).

Images