A food packaging bag winding machine

Abstract

This application relates to the field of winding machine technology and discloses a food packaging bag winding machine, including a base with two symmetrically arranged support plates on the upper surface of the base. This food packaging bag winding machine uses an electromagnetic spring and a pressure sensor to monitor and adjust the pressure of the extrusion rollers on the bag tube in real time, dynamically compensating for changes in material elasticity. This effectively avoids material slippage or breakage due to excessive tightness caused by tension fluctuations, ensuring a stable and reliable winding process. A slotted photoelectric switch directly detects the winding thickness; when the bag roll diameter reaches a set value, it triggers automatic stop, cutting, and an alarm, replacing the traditional indirect control method that relies on motor speed. This avoids length errors caused by uneven material elasticity or thickness, significantly improving cutting accuracy. The cutting mechanism uses a cylinder to drive the cutter to press down quickly, ensuring a clean cut without burrs. After cutting, the extrusion rollers continue to press the bag tube, and with the assistance of an audible and visual alarm, operators can easily tie the bag roll in time, effectively preventing it from loosening.

Description

Technical Field

[0001] This application relates to the field of winding machine technology, specifically a food packaging bag winding machine. Background Technology

[0002] A winding machine is an industrial piece of equipment widely used in printing, packaging and metal processing, mainly used to wind long strips of material into a roll.

[0003] An existing patent (publication number: CN222714683U) discloses a food packaging bag rewinding machine, including a base plate. A fixed plate is installed at one end of the top of the base plate, and a movable plate is slidably connected to the other end. Clamping plates are rotatably connected to both the movable plate and the fixed plate. A rewinding roller is arranged between the two clamping plates. A drive motor for driving the clamping plates to rotate is fixedly installed on the outer wall of the movable plate. An mounting plate is fixedly connected to the side wall of the fixed plate, and a support frame is fixedly installed on the mounting plate. This application, by setting up a mounting plate and cooperating with a support frame, a lower rotating roller, a lifting frame, an upper rotating roller, and a lifting screw, allows the lifting screw to be rotated. The lifting screw can push the lifting frame downward, and the lifting frame drives the upper rotating roller to approach the lower rotating roller, clamping the packaging bag and increasing the tension of the packaging bag during rewinding, thereby improving the rewinding effect of the packaging bag.

[0004] The aforementioned winding machine lifting screw can push the lifting frame downwards, and the lifting frame drives the upper rotating roller to approach the lower rotating roller, clamping the packaging bag and increasing the tension of the packaging bag during winding. However, this technology relies on the number of motor rotations to indirectly calculate the winding thickness. In actual production, due to factors such as the elasticity of the packaging bag material and tension fluctuations, the winding length is prone to errors. After the set length of winding is completed and the material strip is cut, the bag tube, which loses the pressure of the rotating roller, is prone to loosening due to its own elasticity, requiring manual re-sorting, which is quite inconvenient. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a food packaging bag rewinding machine, which has the advantages of high rewinding accuracy and solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, this application provides the following technical solution: a food packaging bag rewinding machine, including a base, wherein two symmetrically arranged support plates are provided on the upper surface of the base, and a winding shaft is rotatably connected to one side of each of the two support plates, and a winding reel is fixedly connected to one end of each winding shaft that is close to each other.

[0007] One side of the base is provided with a cutting mechanism for cutting the packaging bag;

[0008] An anti-loosening component is provided on the other side of the base;

[0009] The anti-loosening component includes a bracket, the bottom end of which is fixedly connected to the base, and an electromagnetic spring fixedly installed at the top end of the bracket. The axis of the electromagnetic spring is perpendicular to the axis of the winding shaft. A fixed seat is installed at the movable end of the electromagnetic spring. A rubber pad is installed inside the fixed seat. A pressure sensor is built into the rubber pad. A mounting seat is fixedly connected to the top of the rubber pad. A shaft seat is fixedly connected to the upper surface of the mounting seat. A squeeze roller is rotatably connected between the front and rear ends of the shaft seat.

[0010] Furthermore, the bearing seat and the mounting base are fixedly connected by bolts.

[0011] The above solution allows for quick replacement of shaft seats of different lengths to meet the winding requirements of packaging bags of different widths, thus improving the versatility of the equipment.

[0012] Furthermore, two limiting rods are fixedly connected to the outer surface of the fixed base, and both limiting rods are slidably inserted into the bracket.

[0013] The above solution restricts the direction of movement of the fixed seat, ensuring that the squeezing roller acts perpendicularly on the surface of the bag tube, thus avoiding uneven pressure caused by deviation.

[0014] Furthermore, a monitoring block is fixedly installed at the top of the bracket, and an electric push rod is installed inside the monitoring block. The axis of the electric push rod is parallel to the axis of the limit rod. A slotted photoelectric switch is installed at the output end of the electric push rod. A detection plate is installed on the outer surface of the limit rod adjacent to the slotted photoelectric switch. An audible and visual alarm is installed on the upper surface of the base.

[0015] With the above scheme, as the winding shaft rewinds, the diameter of the coiled packaging bag gradually increases. The electromagnetic spring drives the fixed seat and limit rod to move, causing the detection plate to enter the slotted photoelectric switch. The external motor stops running, and at the same time, the cutting mechanism is triggered to cut the material strip of the packaging bag, completing the winding work. By controlling the position of the slotted photoelectric switch, the winding thickness can be controlled, thereby controlling the length of the wound packaging bag. At the same time, the audible and visual alarm sounds, and the extrusion roller is cut off from continuing to contact the bag tube, making it convenient for the user to tie the bag. This achieves precise control of the winding length, avoids errors caused by material elasticity or tension fluctuations, and improves cutting accuracy.

[0016] Furthermore, the cutting mechanism includes a gantry frame, with a cylinder fixedly installed at the top of the gantry frame perpendicular to the base, the bottom of the gantry frame fixedly connected to a fixed base, and a cutter fixedly installed at the output end of the cylinder.

[0017] The above method uses a cylinder to drive the cutter to press down quickly, ensuring that the packaging bag material is cut neatly and avoiding dragging or rough edges.

[0018] Furthermore, a bidirectional screw is rotatably connected between the front and rear inner sidewalls of the base, and two support plates are threadedly connected to both ends of the bidirectional screw, with one end of the bidirectional screw fixedly connected to the output end of an external motor.

[0019] The above solution allows for adjustment of the distance between the two support plates by rotating the bidirectional screw, adapting to the installation requirements of winding rolls of different lengths and improving equipment flexibility.

[0020] Furthermore, a set of circumferentially arranged connecting holes are provided on the outer surface of both winding reels.

[0021] The above solution facilitates connection with external take-up rollers, and the take-up roller and take-up reel can be quickly fixed by passing bolts through the connection holes, thus shortening the clamping time.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This food packaging bag rewinding machine uses electromagnetic springs and pressure sensors to monitor and adjust the pressure of the extrusion rollers on the bag tube in real time, dynamically compensating for changes in material elasticity. This effectively avoids material slippage or breakage due to excessive tightness caused by tension fluctuations, ensuring a stable and reliable rewinding process. A slotted photoelectric switch directly detects the rewinding thickness. When the bag roll diameter reaches the set value, it triggers automatic stop, cutting, and an alarm, replacing the traditional indirect control method that relies on motor speed. This avoids length errors caused by uneven material elasticity or thickness, significantly improving cutting accuracy. The cutting mechanism uses a cylinder to drive the cutter to press down quickly, ensuring a clean, burr-free cut. After cutting, the extrusion rollers continue to press the bag tube, and with the help of audible and visual alarms, operators can easily tie the bags in time, effectively preventing the bag rolls from loosening and reducing secondary processing steps. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ;

[0025] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 2 ;

[0026] Figure 3 This is a front view of the overall structure of this application;

[0027] Figure 4 This is a cross-sectional view of the electromagnetic spring structure of this application;

[0028] Figure 5 This is a structural diagram of the slot-type photoelectric switch of this application.

[0029] In the picture:

[0030] 1. Base; 2. Support plate; 3. Rewind spool; 4. Rewind reel;

[0031] 5. Cutting mechanism; 501. Gantry frame; 502. Cylinder; 503. Cutting blade;

[0032] 6. Anti-loosening components; 601. Bracket; 602. Electromagnetic spring; 603. Fixing base; 604. Rubber pad; 605. Pressure sensor; 606. Mounting base; 607. Shaft seat; 608. Extrusion roller;

[0033] 7. Limit rod; 8. Monitoring block; 9. Electric actuator; 10. Slotted photoelectric switch; 11. Detection plate; 12. Audible and visual alarm; 13. Bidirectional screw; 14. Connection hole. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Please see Figures 1-5 This embodiment of a food packaging bag rewinding machine includes a base 1. The upper surface of the base 1 is provided with two symmetrically arranged support plates 2. One side of each support plate 2 is rotatably connected to a rewinding shaft 3. The ends of the two rewinding shafts 3 that are close to each other are fixedly connected to a rewinding disc 4. The other end of one of the rewinding shafts 3 is fixedly connected to the output end of an external motor. By fixing the two ends of the external rewinding roller to the two rewinding discs 4 respectively, the rewinding roller can be quickly clamped and rotated synchronously. The outer surface of each of the two rewinding discs 4 is provided with a set of circumferentially arranged connecting holes 14, which can facilitate the connection with the external rewinding roller. The rewinding roller and the rewinding disc 4 can be quickly fixed by bolts passing through the connecting holes 14, shortening the clamping time.

[0036] A cutting mechanism 5 for cutting packaging bags is provided on one side of the base 1. The cutting mechanism 5 includes a gantry frame 501. A cylinder 502 perpendicular to the base 1 is fixedly installed at the top of the gantry frame 501. The bottom end of the gantry frame 501 is fixedly connected to the fixed seat 603. A cutter 503 is fixedly installed at the output end of the cylinder 502. The cylinder 502 drives the cutter 503 to press down quickly to ensure that the packaging bag material is cut neatly and to avoid dragging or rough edges on the cut.

[0037] A bidirectional screw 13 is rotatably connected between the front and rear inner walls of the base 1. Two support plates 2 are threaded to both ends of the bidirectional screw 13 respectively. One end of the bidirectional screw 13 is fixedly connected to the output end of an external motor. Rotating the bidirectional screw 13 can adjust the distance between the two support plates 2 to adapt to the installation requirements of winding rollers of different lengths and improve the flexibility of the equipment. An anti-loosening component 6 is provided on the other side of the base 1.

[0038] The anti-loosening component 6 includes a bracket 601, the bottom end of which is fixedly connected to the base 1. An electromagnetic spring 602 is fixedly installed on the top end of the bracket 601. The axis of the electromagnetic spring 602 is perpendicular to the axis of the winding shaft 3. A fixed seat 603 is installed on the movable end of the electromagnetic spring 602. A rubber pad 604 is installed inside the fixed seat 603. A pressure sensor 605 is built into the rubber pad 604. A mounting base 606 is fixedly connected to the top of the rubber pad 604. A shaft seat 607 is fixedly connected to the upper surface of the mounting base 606. A squeezing roller 608 is rotatably connected between the front and rear ends. Users can replace the bearing 607 to adapt to different lengths of take-up rollers. The bearing 607 is fixedly connected to the mounting base 606 by bolts, which facilitates quick disassembly and assembly to adapt to different specifications of take-up rollers. The pressure sensor 605 and the electromagnetic spring 602 are respectively connected to the external control system. Through the setting of the electromagnetic spring 602 and the pressure sensor 605, the pressure of the squeezing roller 608 on the bag tube is monitored and adjusted in real time to maintain a constant tension and prevent the material from slipping or breaking due to excessive tightness.

[0039] The bearing seat 607 and the mounting seat 606 are fixedly connected by bolts. With the above settings, bearing seats 607 of different lengths can be quickly replaced to adapt to the winding requirements of packaging bags of different widths, thereby improving the versatility of the equipment. Two limiting rods 7 are fixedly connected to the outer surface of the fixed seat 603. Both limiting rods 7 are slidably inserted into the bracket 601. With the above settings, the movement direction of the fixed seat 603 is restricted, ensuring that the extrusion roller 608 acts perpendicularly on the surface of the bag tube, avoiding uneven pressure caused by deviation.

[0040] A monitoring block 8 is fixedly installed at the top of the bracket 601. An electric actuator 9 is installed inside the monitoring block 8. The axis of the electric actuator 9 is parallel to the axis of the limit rod 7. A slotted photoelectric switch 10 is installed at the output end of the electric actuator 9. The slotted photoelectric switch 10 is a photoelectric sensor that detects the position of an object by blocking a light beam. The slotted photoelectric switch 10 is connected to an external control system. A detection plate 11 is installed on the outer surface of the limit rod 7 adjacent to the slotted photoelectric switch 10. An audible and visual alarm 12 is installed on the upper surface of the base 1. When the winding shaft 3 winds up, the diameter of the coiled packaging bag gradually increases. The electromagnetic spring 602 drives the fixed base 603 and the limit rod 7 to move, thereby causing the detection piece 11 to enter the slotted photoelectric switch 10. The external motor stops running, and at the same time, the cutting mechanism 5 is triggered to cut the material strip of the packaging bag, completing the winding work. By controlling the position of the slotted photoelectric switch 10, the winding thickness can be controlled, thereby controlling the length of the wound packaging bag. At the same time, the audible and visual alarm 12 sounds an alarm, and the cutting extrusion roller 608 continues to contact the bag tube, making it convenient for the user to tie it. This achieves precise control of the winding length, avoids errors caused by material elasticity or tension fluctuations, and improves cutting accuracy.

[0041] The working principle of the above embodiment is as follows: The operator drives the bidirectional screw 13 to rotate via an external motor, causing the two support plates 2 to move in opposite directions along the inner wall of the base 1 to accommodate the installation requirements of different length take-up rollers. The two ends of the take-up roller are inserted into the connection holes 14 of the two take-up reels 4 respectively, and fastened quickly by bolts passing through the connection holes 14. The shaft seat 607 of the corresponding length is replaced according to the width of the packaging bag to ensure that the extrusion roller 608 effectively covers the surface of the bag tube. The external motor is started, driving one of the take-up shafts 3 to rotate, which drives the take-up roller to rotate synchronously through the take-up reel 4, and begins to wind the packaging bag material strip. The electromagnetic spring 602 pushes the fixed seat 603 to move towards the take-up roller, so that the extrusion roller 608 vertically presses the surface of the bag tube. The pressure sensor 605 in the rubber pad 604 monitors the pressure value of the extrusion roller 608 on the bag tube in real time and feeds the signal back to the control system. The control system dynamically adjusts the extension and retraction of the electromagnetic spring 602 to compensate for changes in the elasticity of the packaging bag material and maintain a constant tension. As the diameter of the bag tube gradually increases, the extrusion roller 608 and the fixed seat 603 are pushed outward, causing the limit rod 7 to slide synchronously. When the detection piece 11 on the limit rod 7 enters the slot of the slotted photoelectric switch 10, the light beam is blocked. The slotted photoelectric switch 10 sends a stop signal to the control system, the external motor stops running, the winding roller stops rotating, the cylinder 502 on the gantry 501 drives the cutter 503 to press down quickly and cut the material strip neatly to avoid dragging or rough edges. The audible and visual alarm 12 on the base 1 is activated to remind the operator that the winding is complete. After cutting, the electromagnetic spring 602 still maintains the pressure of the extrusion roller 608 on the bag tube to prevent the bag roll from loosening due to the elasticity of the packaging bag. The operator removes the completed bag roll and secures it.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A food packaging bag rewinding machine, comprising a base (1), characterized in that: The upper surface of the base (1) is provided with two symmetrically arranged support plates (2), and one side of each support plate (2) is rotatably connected to a winding shaft (3), and the two winding shafts (3) are fixedly connected to a winding reel (4) at their respective ends that are close to each other. A cutting mechanism (5) for cutting the packaging bag is provided on one side of the base (1); An anti-loosening component (6) is provided on the other side of the base (1); The anti-loosening component (6) includes a bracket (601), the bottom end of the bracket (601) is fixedly connected to the base (1), an electromagnetic spring (602) is fixedly installed on the top end of the bracket (601), the axis of the electromagnetic spring (602) is perpendicular to the axis of the winding shaft (3), a fixed seat (603) is installed on the movable end of the electromagnetic spring (602), a rubber pad (604) is installed inside the fixed seat (603), a pressure sensor (605) is built into the rubber pad (604), a mounting seat (606) is fixedly connected to the top of the rubber pad (604), a shaft seat (607) is fixedly connected to the upper surface of the mounting seat (606), and a squeeze roller (608) is rotatably connected between the front and rear ends of the shaft seat (607).

2. The food packaging bag rewinding machine according to claim 1, characterized in that: The bearing seat (607) and the mounting seat (606) are fixedly connected by bolts.

3. The food packaging bag rewinding machine according to claim 1, characterized in that: Two limiting rods (7) are fixedly connected to the outer surface of the fixed base (603), and both limiting rods (7) are slidably inserted into the bracket (601).

4. A food packaging bag rewinding machine according to claim 1 or 3, characterized in that: A monitoring block (8) is fixedly installed at the top of the bracket (601). An electric push rod (9) is installed inside the monitoring block (8). The axis of the electric push rod (9) is parallel to the axis of the limit rod (7). A slotted photoelectric switch (10) is installed at the output end of the electric push rod (9). A detection plate (11) is installed on the outer surface of the limit rod (7) adjacent to the slotted photoelectric switch (10). An audible and visual alarm (12) is installed on the upper surface of the base (1).

5. A food packaging bag rewinding machine according to claim 1, characterized in that: The cutting mechanism (5) includes a gantry (501), a cylinder (502) perpendicular to the base (1) is fixedly installed at the top of the gantry (501), the bottom of the gantry (501) is fixedly connected to the fixed seat (603), and a cutter (503) is fixedly installed at the output end of the cylinder (502).

6. A food packaging bag rewinding machine according to claim 1, characterized in that: A bidirectional screw (13) is rotatably connected between the front and rear inner walls of the base (1). Two support plates (2) are threaded to both ends of the bidirectional screw (13) respectively. One end of the bidirectional screw (13) is fixedly connected to the output end of an external motor.

7. A food packaging bag rewinding machine according to claim 1, characterized in that: Both of the two winding reels (4) have a set of circumferentially arranged connecting holes (14) on their outer surfaces.

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