A bag cutting machine for preventing bag edge curling

Abstract

This utility model relates to the technical field of packaging bag production and processing, and in particular to a packaging bag anti-curling edge cutting machine, including a frame on which an unwinding assembly, an adjusting assembly, and an anti-curling edge assembly are installed. In existing packaging bag materials, the edges of the material strip are prone to warping and wrinkling during the unwinding and conveying process. When the rolled-up material strip enters the cutting process, it leads to dimensional deviations. This device's anti-curling edge assembly uses a bidirectional screw-driven adjustable anti-curling edge pressure strip, combined with an oblique guide groove and an open groove design, to form a wrapping guide for the material strip edge. The bidirectional screw can simultaneously adjust the distance between the pressure strips on both sides to adapt to different widths of material strips. The combination of the open groove and the guide groove effectively suppresses warping and wrinkling of the material strip, resulting in a smooth edge for the cut packaging bag. The unwinding assembly stably unwinds and positions the material roll, the anti-curling edge assembly prevents the material strip from curling, and the adjusting assembly adapts to the thickness and provides stable feeding. The three components work together to ensure continuous and warp-free material strip conveying, improving the product qualification rate.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging bag production and processing, and in particular to a packaging bag anti-rolling edge cutting machine. Background Technology

[0002] In the field of packaging bag production and processing, the bag cutting machine is the core equipment for realizing the batch cutting of packaging bags. It needs to work with the unwinding mechanism to transport the rolled packaging bag material to the cutting part to complete the fixed length cutting. During the unwinding and conveying process, the edge of the packaging bag material is prone to warping and wrinkling. After the rolled material enters the cutting process, it will cause the cutting size deviation, bag mouth rough edge, and even cause the material to jam, which seriously affects the product qualification rate and production efficiency. Therefore, there is a special need for a packaging bag anti-rolling edge cutting machine.

[0003] To address the aforementioned problems, a packaging bag anti-rolling edge cutting machine is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a packaging bag anti-rolling edge cutting machine to solve the problem of the existing packaging bag anti-rolling edge cutting machine mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a packaging bag anti-rolling edge cutting machine, including a frame, on which an unwinding assembly, an adjusting assembly, and an anti-rolling edge assembly are provided; The unwinding assembly includes an unwinding bracket and an unwinding shaft. The unwinding bracket is installed on both sides of the frame, and the unwinding shaft is rotatably mounted on the unwinding bracket. The adjustment assembly includes a mounting plate, an upper pressure roller, and a transmission roller. The upper pressure roller is disposed between the mounting plates, and the transmission roller is disposed below the upper pressure roller. The anti-warping edge assembly includes a crossbeam, a bidirectional screw, a connecting arm, and an anti-warping edge pressure strip. The crossbeam is installed between two sets of mounting plates. The bidirectional screw is rotatably mounted on the crossbeam. The connecting arm is threadedly connected to the bidirectional screw. The anti-warping edge pressure strip is installed on the top surface of the frame via the connecting arm.

[0006] Preferably, the unwinding assembly further includes a fixed base, a guide roller, and a coil positioning ring. The guide roller is mounted on the frame via the fixed base, and the coil positioning ring is provided on the unwinding shaft.

[0007] Preferably, the adjustment assembly further includes an adjustment groove and an adjustment knob. The adjustment groove is formed on the surface of the mounting plate, and the upper pressure roller is movably disposed in the adjustment groove. The position is adjusted by the threaded connection between the adjustment knob and the mounting plate.

[0008] Preferably, the adjustment assembly further includes a driven wheel, a transmission belt, and a driving wheel, wherein the transmission roller is connected to the driving wheel, and the driving wheel is connected to the driven wheel via the transmission belt.

[0009] Preferably, the anti-warping component further includes a guide rod, and the connecting arm is slidably sleeved on the guide rod.

[0010] Preferably, the anti-warping edge assembly further includes a scale, an opening groove, and a guide groove. A scale is provided on one side of the crossbeam below the bidirectional screw. An opening groove and a guide groove are provided on the inner side of the anti-warping edge strip, and the guide groove is located above the opening groove and is opened at an angle.

[0011] Preferably, the threads at both ends of the bidirectional screw have opposite directions, so that when the bidirectional screw rotates, the two connecting arms can move closer to or further away from each other along the guide rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This device's anti-warping edge assembly uses a bidirectional screw-driven adjustable anti-warping pressure strip, combined with an oblique guide groove and an open groove design, to form a wrapping guide for the material strip edge. The bidirectional screw can simultaneously adjust the spacing between the pressure strips on both sides to adapt to different widths of material strips. The combination of the open groove and the guide groove effectively suppresses material strip warping and wrinkles, resulting in a flat edge on the packaged bag after cutting. The unwinding assembly stably unwinds and positions the material roll, the anti-warping edge assembly prevents the material strip from curling, and the adjusting assembly adapts to the thickness and feeds the material smoothly. The three components work together to ensure continuous and warp-free material strip transport, significantly improving cutting accuracy and product qualification rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the unwinding assembly and the adjusting assembly of this utility model; Figure 4 This is a schematic diagram of the anti-warping component of this utility model; Figure 5 This is a schematic diagram of the anti-warping edge strip of this utility model.

[0014] In the diagram: 1. Frame; 2. Unwinding assembly; 201. Unwinding bracket; 202. Fixed base; 203. Unwinding shaft; 204. Guide roller; 205. Coil positioning ring; 3. Adjustment assembly; 301. Mounting plate; 302. Upper pressure roller; 303. Drive roller; 304. Adjustment groove; 305. Adjustment knob; 306. Driven wheel; 307. Drive belt; 308. Drive wheel; 4. Anti-warping assembly; 401. Crossbeam; 402. Bidirectional screw; 403. Guide rod; 404. Scale; 405. Connecting arm; 406. Anti-warping pressure strip; 407. Opening groove; 408. Guide groove. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] Example like Figure 1-5 As shown, the assembly includes a frame 1, on which an unwinding assembly 2, an adjusting assembly 3, and an anti-warping edge assembly 4 are mounted. The anti-warping edge assembly 4 includes a crossbeam 401, a bidirectional screw 402, a connecting arm 405, and an anti-warping edge pressure strip 406. The crossbeam 401 is installed between two sets of mounting plates 301. The bidirectional screw 402 is rotatably mounted on the crossbeam 401. The connecting arm 405 is threadedly connected to the bidirectional screw 402. The anti-warping edge pressure strip 406 is mounted on the connecting arm 405. On the top surface of the frame 1, the anti-warping component 4 also includes a guide rod 403, and a connecting arm 405 is slidably sleeved on the guide rod 403. The anti-warping component 4 also includes a scale 404, an opening groove 407 and a guide groove 408. A scale 404 is provided on one side of the crossbeam 401 below the bidirectional screw 402. An opening groove 407 and a guide groove 408 are provided on the inner side of the anti-warping pressure strip 406, and the guide groove 408 is located above the opening groove 407 and is opened obliquely.

[0017] It should be noted that the packaging bag anti-curling edge cutting machine in this embodiment uses the frame 1 as the basic supporting frame. The overall structure is a horizontal strip, which facilitates the continuous conveying of the packaging bag material strip from unwinding to anti-curling edge treatment. The frame 1 is made of high-strength steel and is equipped with anti-slip pads at the bottom to ensure the stability of the device during operation. Along the material strip conveying direction, the unwinding assembly 2, the anti-curling edge assembly 4, and the adjusting assembly 3 are sequentially assembled on the frame 1. The anti-curling edge assembly 4 is located between the unwinding assembly 2 and the adjusting assembly 3, and can perform immediate anti-curling edge treatment on the material strip that has just been output from the unwinding assembly 2 to prevent the material strip from curling. During subsequent conveying, edge warping and wrinkling may occur. The anti-warping component 4 is the core innovative component of the device, used to prevent edge warping of the packaging bag material belt during conveying. Its core components include a crossbeam 401, a bidirectional screw 402, a connecting arm 405, and an anti-warping pressure strip 406. The crossbeam 401 is a rectangular metal beam, which is horizontally fixed between the tops of two mounting plates 301 by bolts. The bidirectional screw 402 is a cylindrical metal rod with two sections of opposite external threads in the middle of the rod body. The left section is a left-hand thread and the right section is a right-hand thread. Both ends are rotatably mounted on the mounting plate 301 through thrust ball bearings. The two ends of the bearing housing 1 have a bidirectional screw 402 extending out of the mounting plate 301 and equipped with a handwheel for easy manual rotation. The connecting arm 405 is a Z-shaped metal arm, with two arms in total. The top of each connecting arm 405 has an internal thread hole that matches the thread of the bidirectional screw 402. The two connecting arms 405 are respectively threaded onto the left-hand thread section and the right-hand thread section of the bidirectional screw 402. The anti-warping edge pressure strip 406 is a long strip of metal with a U-shaped cross-section and the opening facing the inside of the conveyor belt direction. The top of each anti-warping edge pressure strip 406 has a U-shaped cross-section and the opening facing the inside of the conveyor belt direction. The part is fixed to the bottom of a connecting arm 405. The inner sides of the two anti-warping pressure strips 406 are provided with opening grooves 407. The opening grooves 407 are used to accommodate the two sides of the material strip. A guide groove 408 is obliquely opened above the opening grooves 407. There is a five-centimeter ultra-thin oblique protrusion between the guide groove 408 and the opening groove 407. The edge of the protrusion is rounded. When the material strip slides in the opening groove 407, if there is a curled edge on the edge of the material strip, the curled part of the curled edge will slide along the guide groove 408. Since the protrusion and the guide groove 408 are obliquely set, the curled edge of the material strip will gradually flatten. To optimize the anti-warping effect and ease of adjustment, the anti-warping component 4 also includes a guide rod 403, a scale 404, an opening slot 407, and a guide groove 408. The guide rod 403 is a cylindrical metal rod, parallel to the bottom of the bidirectional screw 402, with both ends fixed to the ends of the crossbeam 401. The middle of the connecting arm 405 has a guide hole that matches the guide rod 403. The connecting arm 405 slides onto the guide rod 403 through the guide hole, preventing the connecting arm 405 from rotating with the bidirectional screw 402 and ensuring that it only moves along the screw axis. The scale 404 is a graduated metal plate, fixed to the top surface of one side of the crossbeam 401, and the scale direction is consistent with the axis direction of the bidirectional screw 402. The side of the connecting arm 405 has a pointer that points to the scale line of the scale 404, making it easy for operators to intuitively read the distance between the two connecting arms 405 and quickly adapt to material strips of different widths.

[0018] like Figure 1-3 As shown, the unwinding assembly 2 includes an unwinding bracket 201 and an unwinding shaft 203. The unwinding bracket 201 is installed on both sides of the frame 1, and the unwinding shaft 203 is rotatably mounted on the unwinding bracket 201. The unwinding assembly 2 also includes a fixed seat 202, a guide roller 204, and a coil positioning ring 205. The guide roller 204 is mounted on the frame 1 through the fixed seat 202, and the coil positioning ring 205 is provided on the unwinding shaft 203. The adjusting assembly 3 includes a mounting plate 301, an upper pressure roller 302, and a transmission roller 303. The upper pressure roller 302 is disposed between the mounting plates 301. The transmission roller 303 is located below the upper pressure roller 302. The adjustment assembly 3 also includes an adjustment groove 304 and an adjustment knob 305. The adjustment groove 304 is opened on the surface of the mounting plate 301, and the upper pressure roller 302 is movably disposed in the adjustment groove 304. The position is adjusted by the threaded connection between the adjustment knob 305 and the mounting plate 301. The adjustment assembly 3 also includes a driven wheel 306, a transmission belt 307 and a driving wheel 308. The transmission roller 303 is connected to the driving wheel 308, and the driving wheel 308 is connected to the driven wheel 306 through the transmission belt 307.

[0019] It should be noted that, in this embodiment, the unwinding assembly 2 is used to install the packaging bag material roll and achieve stable output of the material strip. Its core components include an unwinding bracket 201 and an unwinding shaft 203. The unwinding shaft 203 is a cylindrical metal rod, and its two ends are rotatably mounted in the top holes of the vertical section of the unwinding bracket 201 through deep groove ball bearings. The bearings reduce the frictional resistance when the unwinding shaft 203 rotates, ensuring smooth output of the material strip. To further optimize the unwinding effect, the unwinding assembly 2 also includes a fixing seat 202, a guide roller 204, and a material roll positioning ring 205. The fixing seat 202 is a rectangular metal block, two in total, which are respectively installed on the top of the frame 1 near the unwinding bracket 201. The guide roller 204 is a smooth cylindrical roller body, which is rotatably mounted between two fixed seats 202 through pins at both ends. Its axis is parallel to the axis of the unwinding shaft 203. It is used to receive the material strip output from the unwinding shaft 203 and guide the material strip to be conveyed towards the anti-warping component 4 to prevent the material strip from sagging or deviating. The material roll positioning ring 205 consists of two annular metal parts. The inner hole is clearance-fitted with the outer circle of the unwinding shaft 203 and can slide along the axis of the unwinding shaft 203. In use, the two positioning rings are respectively pressed against the two end faces of the material roll, and then fixed to the unwinding shaft 203 by the set screws on the side of the positioning rings to achieve axial positioning of material rolls of different widths and prevent the material roll from moving left and right during the unwinding process.Adjustment component 3 is used to adjust the conveying pressure and speed of the material belt, ensuring that the material belt is smoothly conveyed to the subsequent cutting process (the cutting component is not marked in the attached diagram; the cutting component is installed on the side of adjustment component 3 away from anti-warping component 4, and its specific structure is existing mature technology, which will not be described here). Its core components include mounting plate 301, upper pressure roller 302, and drive roller 303. Mounting plate 301 is installed on the top of frame 1 away from unwinding component 2, and the two mounting plates 301 are arranged opposite each other. Upper pressure roller 302 is a cylindrical roller with a rubber layer on its surface. The rubber layer can increase the friction with the material belt and prevent warping. To prevent slippage, the upper pressure roller 302 is movably mounted between two mounting plates 301 via sliding bearings at both ends. The drive roller 303 is a cylindrical metal roller with a chrome-plated surface to improve wear resistance. It is rotatably mounted between the two mounting plates 301 via rolling bearings at both ends, with the drive roller 303 located directly below the upper pressure roller 302. The axes of the two rollers are parallel, forming a material belt clamping and conveying channel. To achieve position adjustment and power transmission of the upper pressure roller 302, the adjustment assembly 3 also includes an adjustment groove 304, an adjustment knob 305, a driven wheel 306, a transmission belt 307, and a drive wheel 308. The adjustment groove 304 is elongated. A rectangular groove is formed in the center of the mounting plate 301, extending vertically. Sliding bearings at both ends of the upper pressure roller 302 are embedded in the adjusting groove 304, allowing it to slide up and down along the groove. The adjusting knob 305 is a bolt with a handle; its screw section passes through a threaded hole at the top of the mounting plate 301 and connects to the sliding bearing at the end of the upper pressure roller 302 via a thrust bearing. Rotating the adjusting knob 305 pushes the upper pressure roller 302 up and down along the adjusting groove 304, thereby adjusting the distance between the upper pressure roller 302 and the drive roller 303 to accommodate packaging bag material strips of different thicknesses. The drive wheel 308 is a synchronous pulley. The driven pulley 306 is also a synchronous pulley, which is connected to one end of the shaft of the transmission roller 303 via a flat key. It is bolted to the motor output shaft on the side of the frame 1. The motor is a servo motor (not shown in the attached figure. The motor is fixed to the bottom of the frame 1 by a motor bracket. The specific structure is a mature existing technology and will not be described here). The transmission belt 307 is a synchronous belt, which is sleeved between the driving pulley 308 and the driven pulley 306. After the motor starts, the transmission roller 303 is driven to rotate through the driven pulley 306, the transmission belt 307 and the driving pulley 308, which in turn cooperates with the pressure roller 302 to realize the active conveying of the material belt. In this device, each thread adjustment part (adjustment knob, double-acting screw, positioning ring, etc.) can ensure stable position after adjustment by means of the self-locking characteristics of fine or triangular threads and anti-loosening parts, so as to avoid loosening during operation. The specific structure is a mature existing technology and will not be described here.

[0020] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-5The operator places the packaging bag roll onto the unwinding shaft 203, slides the roll positioning ring 205 so that the two positioning rings are respectively close to the two end faces of the roll, and tightens the set screws on the positioning rings to complete the axial positioning of the roll. Depending on the width of the material strip, rotate the handwheel at the end of the bidirectional screw 402. Since the two sections of the bidirectional screw 402 have opposite threads and the connecting arm 405 can only move horizontally under the restriction of the guide rod 403, the two connecting arms 405 will move closer or further apart along the bidirectional screw 402. At the same time, observe the indication value of the pointer on the scale 404 on the side of the connecting arm 405 until the gap between the two anti-warping pressure strips 406 matches the width of the material strip, then stop rotating the handwheel. Rotate the adjustment knob 305 of the adjustment component 3 to push the upper pressure roller 302 down along the adjustment groove 304 until the gap between the upper pressure roller 302 and the transmission roller 303 is slightly less than the thickness of the material belt, so as to ensure that the material belt is stably clamped and will not be damaged, thus completing the adjustment of the conveying pressure. The free end of the material roll is pulled out and passed through the top of the guide roller 204 in sequence. The edge of the material strip is embedded in the opening groove 407 of the anti-warping pressure strip 406. The guide groove 408 pre-guides the material strip. Finally, it passes through the clamping channel between the upper pressure roller 302 and the drive roller 303 and extends to the subsequent cutting process. During the conveying process of the material belt, the anti-warping pressure strip 406 provides continuous guidance to the edge of the material belt through its U-shaped structure, effectively flattening the warped edge of the material belt. When the motor of the adjusting component 3 is started, it drives the transmission roller 303 to rotate through the driven wheel 306, the transmission belt 307 and the driving wheel 308. The upper pressure roller 302 rotates synchronously with the transmission roller 303 under the friction of the material belt. The two work together to smoothly convey the material belt to the cutting process, completing the continuous bag cutting operation of the packaging bag. If it is necessary to adjust the conveying speed of the material belt, it can be achieved by adjusting the speed of the motor to adapt to the cutting requirements of different specifications of packaging bags.

[0021] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bagging machine for preventing curling and cutting a bag, characterized by: Includes a frame (1), on which an unwinding assembly (2), an adjusting assembly (3) and an anti-warping assembly (4) are provided; The unwinding assembly (2) includes an unwinding bracket (201) and an unwinding shaft (203). The unwinding bracket (201) is installed on both sides of the frame (1), and the unwinding shaft (203) is rotatably mounted on the unwinding bracket (201). The adjustment assembly (3) includes a mounting plate (301), an upper pressure roller (302), and a transmission roller (303). The upper pressure roller (302) is disposed between the mounting plates (301), and the transmission roller (303) is disposed below the upper pressure roller (302). The anti-warping edge assembly (4) includes a crossbeam (401), a bidirectional screw (402), a connecting arm (405), and an anti-warping edge strip (406). The crossbeam (401) is installed between two sets of mounting plates (301). The bidirectional screw (402) is rotatably mounted on the crossbeam (401). The connecting arm (405) is threadedly connected to the bidirectional screw (402). The anti-warping edge strip (406) is installed on the top surface of the frame (1) through the connecting arm (405).

2. A bag anti-curling cutting machine according to claim 1, characterized in that: The unwinding assembly (2) also includes a fixed seat (202), a guide roller (204) and a roll positioning ring (205). The guide roller (204) is mounted on the frame (1) via the fixed seat (202), and the roll positioning ring (205) is provided on the unwinding shaft (203).

3. The gusseting bag cutting machine of claim 1, wherein: The adjustment assembly (3) further includes an adjustment groove (304) and an adjustment knob (305). The adjustment groove (304) is opened on the surface of the mounting plate (301), and the upper pressure roller (302) is movably disposed in the adjustment groove (304). The position is adjusted by the threaded connection between the adjustment knob (305) and the mounting plate (301).

4. The packaging bag anti-rolling edge cutting machine according to claim 1, characterized in that: The adjustment assembly (3) further includes a driven wheel (306), a transmission belt (307) and a driving wheel (308). The transmission roller (303) is connected to the driving wheel (308), and the driving wheel (308) is connected to the driven wheel (306) via the transmission belt (307).

5. The packaging bag anti-rolling edge cutting machine according to claim 1, characterized in that: The anti-warping component (4) also includes a guide rod (403), and the connecting arm (405) is slidably sleeved on the guide rod (403).

6. The packaging bag anti-rolling edge cutting machine according to claim 1, characterized in that: The anti-warping component (4) also includes a scale (404), an opening groove (407) and a guide groove (408). The scale (404) is provided on one side of the crossbeam (401) below the bidirectional screw (402). The anti-warping pressure strip (406) has an opening groove (407) and a guide groove (408) on its inner side, and the guide groove (408) is located above the opening groove (407) and is opened obliquely.

7. The packaging bag anti-rolling edge cutting machine according to claim 1, characterized in that: The two ends of the bidirectional screw (402) have opposite threads. When the bidirectional screw (402) rotates, the two connecting arms (405) can move closer to or further away from each other along the guide rod (403).

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