A packaging bag bottom sealing and feeding device

Abstract

The utility model relates to a packaging bag bottom seal feeding device belongs to packaging bag bottom seal feeding technical field, this packaging bag bottom seal feeding device, include: the feeding seat, the top rotation of feeding seat installs with the deviation guide roller group, one side fixed mounting of feeding seat has the support plate, the surface fixed mounting of support plate has the unwinding shaft disc, one side rotation of support plate has the return roller, detect feeding mechanism for detecting feeding tension adjustment the detection feeding mechanism setting is in the surface of feeding seat, wherein, the detection feeding mechanism includes setting in the driving plate of feeding seat surface, through setting detection feeding mechanism on the feeding seat, realize the tension detection and dynamic adjustment of roll film feeding process. Detection subassembly reciprocating movement along the circular arc track, can real -time response different running angle under the tension change, adjustment subassembly and its linkage, when detecting the tension deviation, synchronous drive the close -fitting part fine adjustment close -fitting force realizes the tension automatic balance.

Description

Technical Field

[0001] This utility model relates to the field of bottom sealing feeding technology for packaging bags, and in particular to a bottom sealing feeding device for packaging bags. Background Technology

[0002] The bottom-seal feeding device for packaging bags is mainly used to produce packaging bags with a bottom seal structure by continuously processing roll packaging film materials through processes such as film spreading, edge folding, heat sealing, and feeding. It is a key piece of equipment in automated packaging production lines. If the tension is too low during the unwinding and feeding process, it can easily lead to film loosening, deviation, and wrinkling; while if the tension is too high, it may cause the film to be stretched and deformed, resulting in bottom seal position deviation, seal line tearing, or bag length error. In severe cases, it can also cause poor heat sealing and material waste.

[0003] Existing tension detection and adjustment mechanisms typically employ a fixed detection roller or a single-point force-sensing roller structure, achieving tension feedback through a single detection point. This detection method suffers from limited sensitivity and a relatively singular detection angle when there are angular deviations in the film feeding path or when switching between different film materials. This makes it difficult to accurately reflect the dynamic tension changes of the film during actual operation, resulting in a delayed response in subsequent tension adjustment and impacting feeding stability and bag-making accuracy. Utility Model Content

[0004] Therefore, it is necessary to address the problem that existing tension detection mechanisms mostly use fixed detection rollers or single-point force sensing rollers, achieving tension feedback through a single measuring point. This method suffers from insufficient sensitivity and a single detection angle when there is angular deviation in the film feeding path or when switching between different materials, making it difficult to accurately reflect dynamic tension changes. This leads to lag in adjustment response, affecting feeding stability and bag-making accuracy. Therefore, a bottom-seal feeding device for packaging bags should be provided.

[0005] A bottom-sealing feeding device for packaging bags includes: a feeding base, a set of guiding rollers rotatably mounted on the top of the feeding base, a support plate fixedly mounted on one side of the feeding base, a roll unwinding disc fixedly mounted on the surface of the support plate, and a return roller rotatably mounted on one side of the support plate; a feeding detection mechanism, which is disposed on the surface of the feeding base for detecting and adjusting the feeding tension; wherein the feeding detection mechanism includes a drive plate disposed on the surface of the feeding base, a detection component disposed on one side of the drive plate, and an adjustment component disposed on one side of the drive plate.

[0006] The detection assembly includes a first motor fixedly mounted on the surface of the feed seat. The output end of the first motor is fixedly connected to the drive plate. A tension detection wheel is rotatably mounted on the surface of the drive plate. A guide groove is formed on the surface of the feed seat. The guide groove is set in an arc shape. One side of the drive plate is slidably connected to the guide groove.

[0007] The tension detection wheel has a hollow interior, and a pressure sensing rod is fixedly installed inside the tension detection wheel. Multiple transmission rods are fixedly installed on the inner wall of the tension detection wheel, and the other ends of the multiple transmission rods are in contact with the surface of the pressure sensing rod.

[0008] The multiple conductive rods are arranged in a ring shape, and the multiple conductive rods are distributed at equal intervals.

[0009] The adjustment assembly includes a second motor fixedly mounted on the surface of the feed seat, a drive frame fixedly mounted on the output end of the second motor, and a clamping wheel rotatably mounted inside the drive frame.

[0010] Multiple friction blocks are fixedly installed on the surface of the clamping wheel, and all of the friction blocks are set in an elliptical shape.

[0011] A drive rod is fixedly installed inside the clamping wheel, and an air bladder is sleeved on the outside of the drive rod. The drive rod is configured as a hollow structure, and multiple conductive tubes are fixedly installed on the surface of the drive rod. The other end of the conductive tubes is connected to the air bladder.

[0012] An air pump is fixedly installed on the top of the drive frame, and the output end of the air pump is connected to the inside of the drive rod. Beneficial effects

[0013] 1. By setting a detection feeding mechanism on the feeding seat, tension detection and dynamic adjustment during the film feeding process are realized. The detection component moves back and forth along an arc trajectory, which can sense tension changes at different operating angles in real time. It has a wide detection range and sensitive response. The adjustment component is linked with it, and when a tension deviation is detected, it synchronously drives the clamping component to finely adjust the clamping force, thereby realizing automatic tension balancing and replenishment without affecting the continuity of feeding. 2. The second motor is used to drive the drive frame to move or rotate slightly in a preset direction, thereby driving the clamping wheel to move closer to or away from the film winding path, so as to apply or release clamping force to the film winding. During the feeding process, when the detection component detects that the film winding tension is lower than the set value, the second motor rotates in the forward direction, and the drive frame drives the clamping wheel to move inward, so that the clamping wheel applies slight pressure to the film winding to increase the tension. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the detection and feeding mechanism of this utility model; Figure 3 This is a schematic diagram of the drive plate and guide groove structure of this utility model; Figure 4 This is a schematic diagram of the first motor and tension detection wheel structure of this utility model; Figure 5 This is a schematic diagram of the adjustment component structure of this utility model.

[0016] Figure label: 100. Feeding seat; 110. Correcting guide roller group; 200. Support plate; 210. Unwinding disc; 220. Turnback roller; 300. Detection feeding mechanism; 310. Drive plate; 320. Detection component; 321. First motor; 322. Guide groove; 323. Tension detection wheel; 324. Pressure sensing rod; 325. Transmission rod; 330. Adjustment component; 331. Second motor; 332. Drive frame; 333. Pressing wheel; 334. Drive rod; 335. Air pump; 336. Transmission pipe; 337. Airbag; 338. Friction block. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The following is combined Figures 1-5 This invention describes a bottom sealing feeding device for packaging bags.

[0019] In one embodiment, a bottom sealing feeding device for packaging bags includes: a feeding seat 100, a guide roller group 110 rotatably mounted on the top of the feeding seat 100, a support plate 200 fixedly mounted on one side of the feeding seat 100, a roll unwinding disc 210 fixedly mounted on the surface of the support plate 200, and a return roller 220 rotatably mounted on one side of the support plate 200; and a feeding detection mechanism 300, which is disposed on the surface of the feeding seat 100 for detecting and adjusting the feeding tension; wherein the feeding detection mechanism 300 includes a drive plate 310 disposed on the surface of the feeding seat 100, a detection component 320 disposed on one side of the drive plate 310, and an adjustment component 330 disposed on one side of the drive plate 310.

[0020] In this embodiment, by setting a detection feeding mechanism 300 on the feeding seat 100, tension detection and dynamic adjustment during the film feeding process are realized. The detection component 320 is arranged in an arc shape and can move back and forth on the feeding path to sense the tension change of the film at different running angles in real time. The detection coverage is wider and the response is more sensitive. The adjustment component 330 is linked with the detection component 320. When a tension deviation is detected, the clamping component can be driven to generate a slight displacement to change the clamping force on the film, thereby realizing automatic tension balance and compensation without affecting the feeding continuity. It should be noted that existing packaging bag bottom sealing feeding devices typically include basic structures such as a feeding seat 100, an unwinding shaft, a guide roller group 110, a heat sealing assembly, and a traction feeding mechanism. The detection assembly 320 detects the film tension through an arc-shaped guide structure, producing only a slight oscillation when the tension fluctuates. The adjustment assembly 330 applies a controllable clamping force to the film through the clamping wheel 333. Its adjustment stroke is small and constrained by the positioning structure, so it will not interfere with the traction accuracy, synchronous pitch, and heat sealing cycle of the main feeding mechanism.

[0021] like Figure 2 , Figure 3 and Figure 4 As shown, the detection component 320 includes a first motor 321 fixedly installed on the surface of the feeder 100. The output end of the first motor 321 is fixedly connected to the drive plate 310. A tension detection wheel 323 is rotatably installed on the surface of the drive plate 310. A guide groove 322 is provided on the surface of the feeder 100. The guide groove 322 is set in an arc shape. One side of the drive plate 310 is slidably connected to the guide groove 322.

[0022] In this embodiment, the guide groove 322 is set in an arc shape. The drive plate 310 moves back and forth along the guide groove 322 under the drive of the first motor 321, so that the tension detection wheel 323 can perform tension detection on the arc trajectory. When the tension of the film roll changes during the feeding process, the tension detection wheel 323 will make a slight offset with the arc displacement of the drive plate 310. The tension change signal is output through the detection component to realize real-time monitoring of the film roll tension under different feeding angles and paths.

[0023] The tension detection wheel 323 has a hollow internal structure. A pressure sensing rod 324 is fixedly installed inside the tension detection wheel 323. Multiple transmission rods 325 are fixedly installed on the inner wall of the tension detection wheel 323. The other end of each of the multiple transmission rods 325 is in contact with the surface of the pressure sensing rod 324.

[0024] In this embodiment, the tension detection wheel 323 transmits the contact pressure generated during the operation of the film roll evenly to the pressure sensing rod 324 through multiple transmission rods 325. The pressure sensing rod 324 converts the received minute deformation signal into a pressure change for detection, thereby realizing real-time monitoring of the film roll tension. Since the tension detection wheel 323 has a hollow internal structure, it can reduce the inertial load and improve the response speed during rotation. At the same time, the annular distribution of multiple transmission rods 325 makes the force more uniform, avoiding the problems of easy deviation and inaccurate measurement of traditional single-point force measuring rods. It should be noted that the pressure sensing rod 324 is a one-piece molded high-strength elastic detection element. It can be embedded with strain gauges, micro force sensing chips or resistive pressure measuring elements to convert external pressure signals into measurable electrical signals or deformation. When the tension sensing wheel 323 is subjected to the surface tension of the film during the film feeding process, the pressure between the film and the outer surface of the tension sensing wheel 323 will be evenly transmitted to the pressure sensing rod 324 through multiple transmission rods 325. After being subjected to external force, the pressure sensing rod 324 will produce a small axial deformation. This deformation is converted into an electrical signal by the internal pressure measuring element and output to the control system to realize the quantitative detection of real-time tension.

[0025] Multiple conductive rods 325 are arranged in a ring shape, and all of the conductive rods 325 are equidistantly distributed.

[0026] In this embodiment, by arranging multiple transmission rods 325 at equal intervals around the perimeter, the contact pressure generated when the film roll contacts the outer surface of the tension detection wheel 323 can be uniformly transmitted to the pressure sensing rod 324 in the circumferential direction, thereby achieving multi-point synchronous detection.

[0027] like Figure 2 , Figure 3 and Figure 5 As shown, the adjustment assembly 330 includes a second motor 331 fixedly mounted on the surface of the feed seat 100. A drive frame 332 is fixedly mounted on the output end of the second motor 331, and a clamping wheel 333 is rotatably mounted inside the drive frame 332.

[0028] In this embodiment, the second motor 331 is used to drive the drive frame 332 to move or rotate slightly in a preset direction, thereby driving the clamping wheel 333 to move closer to or away from the film winding path to apply or release clamping force to the film. During the feeding process, when the detection component 320 detects that the film tension is lower than the set value, the second motor 331 rotates in the forward direction, and the drive frame 332 drives the clamping wheel 333 to move inward, so that the clamping wheel 333 applies slight pressure to the film to increase the tension.

[0029] Multiple friction blocks 338 are fixedly installed on the surface of the clamping wheel 333, and all of the friction blocks 338 are set in an elliptical shape.

[0030] In this embodiment, the friction block 338 is made of wear-resistant rubber or composite polyurethane material, and has a micro-convex texture on its surface. It can generate stable friction when the film roll comes into contact with the clamping wheel 333. The friction block 338 is designed to be elliptical, so that it can form a dynamic friction effect of periodic contact and release during the rotation of the wheel, which helps to reduce local extrusion marks on the surface of the film roll while ensuring traction.

[0031] A drive rod 334 is fixedly installed inside the clamping wheel 333. An air bag 337 is sleeved on the outside of the drive rod 334. The drive rod 334 is designed with an internal hollow structure. Multiple transmission tubes 336 are fixedly installed on the surface of the drive rod 334. The other end of the transmission tubes 336 is connected to the air bag 337.

[0032] In this embodiment, by injecting gas into the airbag 337, the airbag 337 can expand and deform, thereby causing the outer circumference of the clamping roller 333 to bulge outward slightly, thereby adjusting the contact pressure between the clamping roller 333 and the film roll. When the detection component 320 reports insufficient film roll tension, the control system can introduce compressed gas into the drive rod 334, which is then transported to the airbag 337 via the transmission tube 336, causing the airbag 337 to expand. The surface pressure of the clamping roller 333 increases accordingly, thereby improving the tension of the film roll.

[0033] An air pump 335 is fixedly installed on the top of the drive frame 332, and the output end of the air pump 335 is connected to the inside of the drive rod 334.

[0034] In this embodiment, the air pump 335 can automatically start and stop and regulate air pressure under the drive of the control module. When the detection component 320 reports insufficient film tension, the air pump 335 starts to deliver compressed gas into the drive rod 334. The gas enters the air bag 337 through multiple conduction tubes 336, causing the air bag 337 to expand and deform, thereby pushing the outer surface of the tensioning wheel 333 to protrude slightly in the direction of film winding, so as to increase the tension of the film winding.

[0035] Working principle: First, the film roll is released through the unwinding reel 210. The film roll is then flattened by the guide roller group 110 and the return roller 220 and enters the feeding path. After the detection feeding mechanism 300 is started, the first motor 321 drives the drive plate 310 to move back and forth along the arc guide groove 322. The tension detection wheel 323 contacts its surface during the film roll operation. The tension generated by the film roll is transmitted to the pressure sensing rod 324 through multiple transmission rods 325. The pressure sensing rod 324 converts the pressure change into an electrical signal and transmits it to the control system to realize real-time tension detection. When the detection component 320 indicates insufficient tension, the control module drives the second motor 331 and the air pump 335 to work together. The air pump 335 delivers compressed gas into the drive rod 334, which is then injected into the air bladder 337 via the transmission tube 336. This causes the air bladder 337 to inflate and push the outer surface of the tensioning wheel 333 slightly outward towards the film winding direction, thereby increasing the film winding tension. When the tension is too high, the air pump 335 exhausts gas in the reverse direction, and the air bladder 337 contracts and resets, reducing the tension. Through the linkage between the detection component 320 and the adjustment component 330, dynamic closed-loop adjustment of the film winding tension is achieved.

[0036] It should be noted that the unwinding reel, the first motor, the second motor, the pressure sensing rod, and the air pump mentioned above are all components with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the unwinding reel, the first motor, the second motor, the pressure sensing rod, and the air pump can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, and will not be elaborated here.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bottom-sealing feeding device for packaging bags, characterized in that, include: A feeding seat (100) is provided, with a guide roller group (110) rotatably mounted on the top of the feeding seat (100), a support plate (200) fixedly mounted on one side of the feeding seat (100), a unwinding disc (210) fixedly mounted on the surface of the support plate (200), and a return roller (220) rotatably mounted on one side of the support plate (200). The detection feeding mechanism (300) for detecting and adjusting the feeding tension is disposed on the surface of the feeding seat (100); The detection feeding mechanism (300) includes a drive plate (310) disposed on the surface of the feed seat (100), a detection component (320) disposed on one side of the drive plate (310), and an adjustment component (330) disposed on one side of the drive plate (310).

2. The packaging bag bottom sealing feeding device according to claim 1, characterized in that, The detection component (320) includes a first motor (321) fixedly installed on the surface of the feeder (100). The output end of the first motor (321) is fixedly connected to the drive plate (310). A tension detection wheel (323) is rotatably installed on the surface of the drive plate (310). A guide groove (322) is opened on the surface of the feeder (100). The guide groove (322) is set in an arc shape. One side of the drive plate (310) is slidably connected to the guide groove (322).

3. The packaging bag bottom sealing feeding device according to claim 2, characterized in that, The tension detection wheel (323) has a hollow interior. A pressure sensing rod (324) is fixedly installed inside the tension detection wheel (323). Multiple transmission rods (325) are fixedly installed on the inner wall of the tension detection wheel (323). The other end of each of the multiple transmission rods (325) is in contact with the surface of the pressure sensing rod (324).

4. The packaging bag bottom sealing feeding device according to claim 3, characterized in that, The multiple conductive rods (325) are arranged in a ring shape, and the multiple conductive rods (325) are equidistantly distributed.

5. The packaging bag bottom sealing feeding device according to claim 1, characterized in that, The adjustment assembly (330) includes a second motor (331) fixedly mounted on the surface of the feeder (100), a drive frame (332) fixedly mounted on the output end of the second motor (331), and a clamping wheel (333) rotatably mounted inside the drive frame (332).

6. The packaging bag bottom sealing feeding device according to claim 5, characterized in that, The surface of the abutting wheel (333) is fixedly equipped with a plurality of friction blocks (338), and the plurality of friction blocks (338) are all set in an elliptical shape.

7. The packaging bag bottom sealing feeding device according to claim 6, characterized in that, The drive rod (334) is fixedly installed inside the clamping wheel (333). An air bag (337) is sleeved on the outside of the drive rod (334). The drive rod (334) is configured as a hollow structure. Multiple transmission tubes (336) are fixedly installed on the surface of the drive rod (334). The other end of the transmission tube (336) is connected to the air bag (337).

8. The packaging bag bottom sealing feeding device according to claim 5, characterized in that, An air pump (335) is fixedly installed on the top of the drive frame (332), and the output end of the air pump (335) is connected to the inside of the drive rod (334).

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