A multi-column bale wrapping machine for particulate material

Abstract

The application discloses a kind of granular material multi-column strip package packing machines of packaging equipment technical field, comprising: main frame;Film roll mechanism;First slitting mechanism;Longitudinal sealing mechanism, for forming multiple independent tubular film cylinders by longitudinal heat sealing to multiple narrow films;Particle blanking mechanism, be located above longitudinal sealing mechanism, for quantitatively filling granular material into tubular film cylinder;Transverse sealing mechanism, be located below longitudinal sealing mechanism, for transverse sealing tubular film cylinder before and after particle blanking mechanism filling;Wherein, transverse sealing mechanism includes primary transverse sealing unit and secondary transverse sealing unit arranged below primary transverse sealing unit, primary transverse sealing unit is used to execute heat sealing operation, and secondary transverse sealing unit executes cold sealing operation to the same sealing position after heat sealing by primary transverse sealing unit.The device uses multi-station quantitative blanking to cooperate vibration auxiliary structure, material filling is uniform and smooth, and upper and lower sealing both adopt twice transverse sealing process of heat sealing after cold sealing, and sealing is more firm and reliable.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, specifically to a multi-row strip packaging machine for granular materials. Background Technology

[0002] Strip packaging machines are packaging equipment used to automatically measure, fill, and seal materials such as granules, powders, or liquids into strip-shaped bags. They are widely used in the food, pharmaceutical, and daily chemical industries. Their core functions include forming, feeding, longitudinal sealing, transverse sealing, and cutting processes, requiring coordinated operation of all mechanisms to ensure packaging efficiency and sealing reliability.

[0003] However, the horizontal sealing mechanism of existing strip packaging machines mostly adopts a single heat sealing method, which has problems such as insufficient sealing strength, easy cracking or leakage; and when multiple stations feed simultaneously, particles are prone to bridging, adhesion and uneven filling, which not only affects the quantitative accuracy, but also easily causes material blockage and machine shutdown, making it difficult to meet continuous and stable production.

[0004] To address these issues, a multi-row strip packaging machine for granular materials is provided. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-row strip packaging machine for granular materials, which solves the problems of low sealing strength and insufficient sealing reliability of existing strip packaging machines.

[0006] The present invention achieves the above objectives through the following technical solutions: A multi-row strip packaging machine for granular materials, comprising: Mainframe rack; A film roll mechanism, located on the back side of the main frame, is used to output a complete roll of packaging film; The first slitting mechanism is located on the front side of the main frame and is used to uniformly slit the entire roll of packaging film along the longitudinal direction to form multiple rows of narrow films; The longitudinal sealing mechanism is located on one side of the first slitting mechanism and is used to longitudinally heat seal and form multiple rows of narrow films to form multiple independent tubular film cylinders. A granule feeding mechanism is located above the longitudinal sealing mechanism and is used to quantitatively fill granular material into the tubular membrane cylinder. A transverse sealing mechanism, located below the longitudinal sealing mechanism, is used to seal the tubular membrane cylinder transversely before and after the filler in the granule feeding mechanism. The second cutting mechanism is located below the horizontal sealing mechanism and is used to horizontally cut the sealed film tube to form individual strip bags. The horizontal sealing mechanism includes a primary horizontal sealing unit and a secondary horizontal sealing unit located below the primary horizontal sealing unit. The primary horizontal sealing unit is used to perform heat sealing operations, and the secondary horizontal sealing unit performs cold sealing operations on the same sealing position after the primary horizontal sealing unit has performed heat sealing operations.

[0007] As a further optimization of the present invention, the longitudinal sealing mechanism includes a longitudinal sealing frame, multiple forming tubes, and a longitudinal sealing unit; the forming tubes are spaced apart above the longitudinal sealing frame and correspond one-to-one with the multiple rows of narrow films cut by the first slitting mechanism; a longitudinal sealing collar is fixedly provided on the outer periphery of each forming tube on the longitudinal sealing frame to guide the corresponding row of narrow films to wrap around the outer periphery of the forming tube and form a tubular film tube; the longitudinal sealing unit is located at the lower end of the forming tube and includes a movable seat, a longitudinal sealing drive unit, and multiple movable and fixed heating blocks corresponding one-to-one with the forming tubes; the movable heating block is fixedly provided on the movable seat and has a longitudinal sealing heating tube inside; the fixed heating block is fixedly provided on the longitudinal sealing frame and arranged opposite to the movable heating block; the longitudinal sealing drive unit is connected to the movable seat for driving the movable seat to move the movable heating block closer to or away from the fixed heating block, so as to press and seal the overlapping edge of the tubular film tube longitudinally.

[0008] As a further optimization of the present invention, two shaping plates arranged in a V-shape are provided below the longitudinal sealing unit for flattening and shaping the tubular membrane cylinder.

[0009] As a further optimization of the present invention, the particle feeding mechanism includes a feeding frame, a storage bin fixed on the feeding frame, a vacuum feeder on top of the storage bin, and a quantitative feeding unit at the bottom of the storage bin. The quantitative feeding unit includes multiple metering plates corresponding to the forming tubes, multiple feeders corresponding to the metering plates, a scraper above the metering plates, a discharge plate below the metering plates, a scraper driving unit, and a discharge plate driving unit. A discharge hole is provided at the bottom of the storage bin corresponding to the metering plate. A metering through hole is provided on the metering plate. The feeder is used to guide the particle material into the metering through hole. The scraper driving unit is driven by the scraper and is used to drive the scraper to move to scrape the particle material in the metering through hole and seal its upper opening. The discharge plate driving unit is driven by the discharge plate and is used to drive the discharge plate to rotate to open the lower opening of the metering through hole for discharge. The particle feeding mechanism also includes a feeder driving unit driven by the feeder and is used to drive the feeder to move laterally.

[0010] As a further optimization of the present invention, the longitudinal sealing mechanism further includes a vibration unit for assisting the feeding of granular materials; the vibration unit includes two symmetrically distributed vibrators and a mounting plate that spans and is fixedly disposed on the top of the two vibrators; the forming tube passes through and is fixedly disposed on the mounting plate, the top end of the forming tube is flared and has an overlapping interface that cooperates with the feeding plate; the vibrator is used to drive the forming tube and the feeding plate overlapping with it to vibrate synchronously to assist the feeding of granular materials in the metering through hole.

[0011] As a further optimization of the present invention, the primary horizontal sealing unit includes two oppositely arranged primary horizontal sealing mounting seats, and multiple sets of oppositely arranged heat-resistant textured blocks are provided on the opposite sides of the two primary horizontal sealing mounting seats. A horizontal sealing heating tube is provided inside the primary horizontal sealing mounting seat. The secondary horizontal sealing unit includes two oppositely arranged secondary horizontal sealing mounting seats, and multiple sets of oppositely arranged cold textured blocks are provided on the opposite sides of the two secondary horizontal sealing mounting seats. A serrated blade is provided on one side of the cold textured block for forming an easy-tear opening while sealing.

[0012] As a further optimization of the present invention, the horizontal sealing mechanism further includes a horizontal sealing frame, a horizontal sealing servo unit, and a secondary horizontal sealing mounting frame; the horizontal sealing servo unit is used to drive the hot and cold textured blocks to synchronously align and press seal, and includes a horizontal sealing servo motor, a horizontal sealing lead screw, and a belt drive unit connecting the horizontal sealing servo motor and the horizontal sealing lead screw; the horizontal sealing lead screw is provided with a nut seat, and the nut seat is connected to both the primary horizontal sealing mounting seat and the secondary horizontal sealing mounting frame, and the secondary horizontal sealing mounting seat is located on the secondary horizontal sealing mounting frame.

[0013] As a further optimization of the present invention, the transverse sealing mechanism further includes a traction unit for pulling the tubular membrane cylinder after the first transverse sealing downward to the second transverse sealing unit; the traction unit includes a traction servo motor, a traction screw driven by the traction servo motor, and a traction frame driven by the traction screw.

[0014] As a further optimization of the present invention, the horizontal sealing mechanism further includes a bag length adjustment unit, an upper buffer spring located at the top of the horizontal sealing frame, and a lower buffer cylinder located at the bottom of the secondary horizontal sealing mounting frame; the bag length adjustment unit is fixedly mounted on the nut seat and is connected to the secondary horizontal sealing mounting frame for transmission, and is used to adjust the distance between the primary horizontal sealing unit and the secondary horizontal sealing unit to accommodate different bag length specifications; the upper buffer spring and the lower buffer cylinder are used to suppress the shaking of the mechanism.

[0015] The beneficial effects of this invention are as follows: 1. This invention adopts a multi-station quantitative feeding method combined with a vibration-assisted structure, which ensures uniform and smooth material filling, effectively avoids bridging and residue, and improves filling accuracy and stability.

[0016] 2. The present invention adopts a two-stage horizontal sealing process of heat sealing followed by cold sealing at both the top and bottom, which makes the seal more secure and reliable, while reducing film deformation and making the seal flat and beautiful. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a three-dimensional schematic diagram of the overall structure of the longitudinal sealing mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the bottom structure of the longitudinal sealing mechanism of the present invention; Figure 6 This is a three-dimensional schematic diagram of the overall structure of the horizontal sealing mechanism of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B; Figure 8 This is a side view of the overall structure of the horizontal sealing mechanism of the present invention; Figure 9 This is a schematic diagram of the horizontal sealing servo unit structure of the horizontal sealing mechanism of the present invention; Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point C; Figure 11 This is a three-dimensional schematic diagram of the overall structure of the pellet feeding mechanism of the present invention; Figure 12 This is a top view of the pellet feeding mechanism of the present invention; Figure 13 This is a schematic diagram of the bottom structure of the pellet feeding mechanism of the present invention; Figure 14 For the present invention Figure 13 Enlarged schematic diagram of the structure at point D; Figure 15 This is a three-dimensional schematic diagram of the overall structure of the second slitting mechanism of the present invention; Figure 16 For the present invention Figure 15 Enlarged schematic diagram of the structure at point E in the middle; Figure 17 This is a schematic diagram of the discharge trough structure of the second cutting mechanism of the present invention; Figure 18 This is a schematic diagram of the second slitting mechanism of the present invention installed on the main frame.

[0018] In the picture: 1. Main frame; 101. Product output chute; 102. Empty bag conveying unit; 2. Film roll mechanism; 3. First slitting mechanism; 4. Longitudinal sealing mechanism; 401. Longitudinal sealing frame; 402. Forming tube; 403. Vibrator; 404. Mounting plate; 405. Movable seat; 406. Longitudinal sealing drive unit; 407. Movable hot stamping block; 408. Longitudinal sealing heating tube; 409. Fixed hot stamping block; 410. Longitudinal sealing collar 411. Shaping plate; 412. Overlapping joint; 5. Horizontal sealing mechanism; 501. Horizontal sealing frame; 502. Primary horizontal sealing mounting base; 503. Heat-sealed mesh block; 504. Horizontal sealing heating tube; 505. Secondary horizontal sealing mounting base; 506. Cold mesh block; 507. Serrated blade; 508. Horizontal sealing servo motor; 509. Belt drive unit; 510. Horizontal sealing lead screw; 511. Nut seat; 512. Connecting rod 513. Secondary horizontal sealing mounting frame; 514. Bag length adjustment unit; 515. Traction servo motor; 516. Traction screw; 517. Upper buffer spring; 518. Lower buffer cylinder; 6. Pellet feeding mechanism; 601. Feeding frame; 602. Storage bin; 603. Vacuum feeder; 604. Feeder; 605. Metering plate; 606. Discharge plate; 607. Scraper; 608. Scraper drive unit; 609. Discharge plate drive unit; 610. Feeder drive unit; 7. Second slitting mechanism; 701. Second slitting frame; 702. Transition pressure plate; 703. Cutter holder; 704. Rounded corner cutter; 705. Second slitting drive unit; 706. Discharge chute; 707. Discharge chute drive unit; 708. Elastic rod; 709. Detector; 710. Lifting drive unit; 8. Electrical cabinet. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] To address the issues of low sealing strength and insufficient sealing reliability in existing strip packaging machines, please refer to... Figures 1-2 , Figure 6 The present invention provides a multi-row strip packaging machine for granular materials, comprising: Mainframe 1; The film roll mechanism 2 is located on the back side of the main frame 1 and is used to output a whole roll of packaging film; The first slitting mechanism 3 is located on the front side of the main frame 1 and is used to uniformly slit the entire roll of packaging film along the longitudinal direction to form multiple rows of narrow films. The longitudinal sealing mechanism 4 is located on one side of the first slitting mechanism 3 and is used to longitudinally heat seal and form multiple rows of narrow films to form multiple independent tubular film cylinders. The granule feeding mechanism 6 is located above the longitudinal sealing mechanism 4 and is used to quantitatively fill granular materials into the tubular membrane cylinder. The transverse sealing mechanism 5 is located below the longitudinal sealing mechanism 4 and is used to seal the tubular membrane cylinder transversely before and after the filler of the granule feeding mechanism 6. The second cutting mechanism 7 is located below the horizontal sealing mechanism 5 and is used to horizontally cut the sealed film tube to form independent strip bags. The horizontal sealing mechanism 5 includes a primary horizontal sealing unit and a secondary horizontal sealing unit located below the primary horizontal sealing unit. The primary horizontal sealing unit is used to perform heat sealing operations, and the secondary horizontal sealing unit performs cold sealing operations on the same sealing position after the primary horizontal sealing unit has performed heat sealing operations.

[0021] It is worth mentioning that an electrical cabinet 8 is also provided on one side of the main frame 1, which is used to control the timing and operating status of the various mechanisms of the whole machine.

[0022] When the machine is working, the film roll mechanism 2 outputs a roll of packaging film, which is then longitudinally and evenly cut by the first slitting mechanism 3 to form multiple rows of narrow films. The narrow films enter the longitudinal sealing mechanism 4 and are longitudinally heat-sealed into multiple independent cylindrical film tubes. The bottom of the film tubes is first horizontally sealed by the transverse sealing mechanism 5. Then, the granule feeding mechanism 6 quantitatively fills each film tube with granular material. After the filling is completed, the upper part of the film tube is horizontally sealed again by the transverse sealing mechanism 5. The transverse sealing mechanism 5 performs heat sealing on the sealing position through the primary transverse sealing unit, and then performs cold sealing on the same sealing position through the secondary transverse sealing unit to achieve a cold and heat composite sealing and improve the sealing strength. The sealed film tubes are then horizontally cut by the second slitting mechanism 7 to form independent strip bags. The whole machine achieves continuous automated packaging operation under the centralized control of the electrical cabinet box 8.

[0023] Optionally, the first slitting mechanism 3 may adopt a roller-cutting structure, in which the roll film is continuously and uniformly longitudinally divided into multiple rows of narrow films during the process of passing through the roller cutter.

[0024] like Figures 3-5 As shown, the longitudinal sealing mechanism 4 has 12 longitudinal sealing stations, which can simultaneously feed and longitudinally seal 12 strip bags, greatly improving packaging efficiency. The longitudinal sealing mechanism 4 includes a longitudinal sealing frame 401, multiple forming tubes 402, and a longitudinal sealing unit; the forming tubes 402 are spaced above the longitudinal sealing frame 401 and correspond one-to-one with the multiple rows of narrow films cut by the first cutting mechanism 3; a longitudinal sealing collar 410 is fixedly provided on the outer periphery of each forming tube 402 on the longitudinal sealing frame 401 to guide the corresponding row of narrow films to wrap around the outer periphery of the forming tube 402 and form a tubular film tube.

[0025] The longitudinal sealing unit is located at the lower end of the forming tube 402 and includes a movable seat 405, a longitudinal sealing drive unit 406, and multiple movable hot blocks 407 and fixed hot blocks 409 corresponding one-to-one with the forming tube 402. The movable hot block 407 is fixedly mounted on the movable seat 405 and has a longitudinal sealing heating tube 408 inside. The fixed hot block 409 is fixedly mounted on the longitudinal sealing frame 401 and arranged opposite to the movable hot block 407. The longitudinal sealing drive unit 406 is connected to the movable seat 405 for driving the movable seat 405 to move the movable hot block 407 closer to or away from the fixed hot block 409, so as to press and seal the overlapping edge of the tubular film tube.

[0026] In addition, two V-shaped shaping plates 411 are provided below the longitudinal sealing unit to flatten and shape the tubular membrane tube so that the subsequent transverse sealing mechanism 5 can perform transverse sealing.

[0027] In specific use, the 12 narrow films cut by the first cutting mechanism 3 are synchronously transported to each forming tube 402. After being guided by the longitudinal sealing collar 410, they are wound around the outer periphery of the forming tube 402 to form a complete tubular film tube. The overlapping edge of the film tube corresponds exactly to the mating position of the movable hot stamping block 407 and the fixed hot stamping block 409. The longitudinal sealing heating tube 408 heats the movable hot stamping block 407 to the preset heat sealing temperature. The longitudinal sealing drive unit 406 drives the moving seat 405 to move the 12 movable hot stamping blocks 407 synchronously closer to the fixed hot stamping block 409, and synchronously presses and heat seals the overlapping edge of each film tube to complete the longitudinal sealing. The 12 tubular film tubes after heat sealing are synchronously transported downwards. After being flattened and shaped by the V-shaped shaping plate 411, they are kept flat and enter the horizontal sealing mechanism 5.

[0028] like Figures 11-14 As shown, the pellet feeding mechanism 6 includes a feeding frame 601, a storage bin 602 fixedly mounted on the feeding frame 601, a vacuum feeder 603 located at the top of the storage bin 602, and a quantitative feeding unit located at the bottom of the storage bin 602. The quantitative feeding unit includes multiple metering plates 605 corresponding to the forming tubes 402, multiple feeders 604 corresponding to the metering plates 605, a scraper 607 located above the metering plates 605, a discharge plate 606 located below the metering plates 605, a scraper drive unit 608, and... The material discharge plate drive unit 609; the bottom of the storage bin 602 is provided with a discharge hole corresponding to the position of the metering plate 605, the metering plate 605 is provided with a metering through hole, the feeder 604 is used to introduce granular material into the metering through hole, the scraper drive unit 608 is driven to the scraper 607, and is used to drive the scraper 607 to move to scrape the granular material in the metering through hole and block its upper opening, the material discharge plate drive unit 609 is driven to the material discharge plate 606, and is used to drive the material discharge plate 606 to rotate to open the lower opening of the metering through hole for material discharge.

[0029] In specific use, the granule feeding mechanism 6 automatically conveys and stores external granular materials in the storage bin 602, and the feeder 604 guides the granular materials in the storage bin 602 into the metering through hole. Then, the scraper drive unit 608 drives the scraper 607 to move horizontally, scraping the material in the metering through hole and sealing the upper opening to ensure that the filling amount of each bag is accurate and consistent. The discharge plate drive unit 609 drives the discharge plate 606 to rotate, opening the lower opening of the metering through hole. Under its own weight and vibration assistance, the granular materials fall smoothly into the lower forming tube 402, completing the synchronous quantitative filling of multiple rows of bags.

[0030] In addition, the pellet feeding mechanism 6 also includes a feeder drive unit 610 that is connected to the feeder 604 for driving the feeder 604 to move laterally, so as to facilitate equipment maintenance or cleaning.

[0031] Furthermore, the longitudinal sealing mechanism 4 also includes a vibration unit for assisting the feeding of granular materials; the vibration unit includes two symmetrically distributed vibrators 403 and a mounting plate 404 spanning and fixedly mounted on the top of the two vibrators 403; the forming tube 402 passes through and is fixedly mounted on the mounting plate 404, the top end of the forming tube 402 is flared and has an overlapping interface 412 that cooperates with the discharge plate 606; the vibrators 403 are used to drive the forming tube 402 and the overlapping discharge plate 606 to vibrate synchronously to assist the feeding of granular materials in the metering through hole. By synchronously driving the forming tube 402 and the discharge plate 606 to vibrate by the vibrators 403, the arching effect and adhesion resistance of the granular materials at the metering through hole and the forming tube 402 are broken, ensuring that the granular materials fall smoothly, quickly and completely into the tubular membrane cylinder, preventing feeding blockage or insufficient metering.

[0032] like Figures 6-10 As shown, the primary horizontal sealing unit includes two oppositely arranged primary horizontal sealing mounting seats 502, and multiple sets of oppositely arranged heat-resistant textured blocks 503 are provided on the opposite sides of the two primary horizontal sealing mounting seats 502. A horizontal sealing heating tube 504 is provided inside the primary horizontal sealing mounting seat 502. The secondary horizontal sealing unit includes two oppositely arranged secondary horizontal sealing mounting seats 505, and multiple sets of oppositely arranged cold textured blocks 506 are provided on the opposite sides of the two secondary horizontal sealing mounting seats 505. A serrated blade 507 is provided on one side of the cold textured block 506 for forming an easy-tear opening at the same time as sealing.

[0033] The horizontal sealing mechanism 5 also includes a horizontal sealing frame 501, a horizontal sealing servo unit, and a secondary horizontal sealing mounting bracket 513. The horizontal sealing servo unit is used to drive the hot and cold anodized blocks 503 to synchronously engage and press-seal, and includes a horizontal sealing servo motor 508, a horizontal sealing lead screw 510, and a belt drive unit 509 connecting the horizontal sealing servo motor 508 and the horizontal sealing lead screw 510. The horizontal sealing lead screw 510 is provided with a nut seat 511, which is connected to both the primary horizontal sealing mounting bracket 502 and the secondary horizontal sealing mounting bracket 513. The sealing mounting base 505 is mounted on the secondary horizontal sealing mounting frame 513. Specifically, there are two nut seats 511. One nut seat 511 is fixedly connected to the primary horizontal sealing mounting base 502 through the connecting rod 512, and the other nut seat 511 is directly fixedly connected to the secondary horizontal sealing mounting frame 513. The primary horizontal sealing mounting base 502 and the secondary horizontal sealing mounting base 505 connected to the nut seat 511 are movable. The other set of primary horizontal sealing mounting bases 502 and secondary horizontal sealing mounting bases 505 are fixedly mounted on the horizontal sealing machine frame 501.

[0034] The horizontal sealing mechanism 5 also includes a traction unit for pulling the tubular membrane tube after the first horizontal sealing downward to the second horizontal sealing unit; the traction unit includes a traction servo motor 515, a traction screw 516 that is driven by the traction servo motor 515, and a traction frame that is driven by the traction screw 516.

[0035] In practical use, after the granule feeding mechanism 6 completes the material filling, the horizontal sealing heating tube 504 heats the heat-sealed mesh block 503 to the set temperature. Subsequently, the horizontal sealing servo motor 508 drives the horizontal sealing screw 510 to rotate through the belt drive unit 509, causing the two nut seats 511 on it to move synchronously, so that the primary horizontal sealing mounting seat 502 and the secondary horizontal sealing mounting seat 505 on the movable side move towards the fixed side at the same time, realizing the synchronous mating and sealing of the heat-sealed mesh block 503 and the cold mesh block 506. After the sealing is completed, the traction unit pulls the film cylinder downward to move the area that has been heat-sealed to the position of the secondary horizontal sealing unit, and then the granule feeding mechanism 6 fills the material. This cycle is repeated to achieve efficient collaborative operation of heat sealing and cold sealing.

[0036] The horizontal sealing mechanism 5 also includes a bag length adjustment unit 514, an upper buffer spring 517 located at the top of the horizontal sealing frame 501, and a lower buffer cylinder 518 located at the bottom of the secondary horizontal sealing mounting frame 513. The bag length adjustment unit 514 is fixedly mounted on the nut seat 511 and is connected to the secondary horizontal sealing mounting frame 513 for transmission. It is used to adjust the distance between the primary horizontal sealing unit and the secondary horizontal sealing unit to accommodate different bag length specifications. The bag length adjustment unit 514 can be a linear module or a gear rack mechanism. The above-mentioned driving components are all mature transmission components and will not be described in detail here. The upper buffer spring 517 and the lower buffer cylinder 518 are used to suppress the shaking of the mechanism and improve the smoothness of operation and sealing accuracy.

[0037] like Figures 15-18 As shown, the second slitting mechanism 7 includes a transition pressure plate 702 fixedly mounted on the main frame 1, a second slitting frame 701 located below the transition pressure plate 702, a cutter holder 703 mounted on the second slitting frame 701, a plurality of rounded corner cutters 704 mounted on the cutter holder 703, and a second slitting drive unit 705. The second slitting drive unit 705 is used to drive the rounded corner cutters 704 to move laterally, thereby achieving rounded corner cutting of the four corners of the bag. The second slitting mechanism 7 also includes a lifting drive unit 710, which is connected to the second slitting frame 701 for driving the second slitting frame 701 to move closer to or away from the transition pressure plate 702 to adapt to the slitting requirements of different bag lengths.

[0038] The second slitting mechanism 7 also includes multiple discharge grooves 706 corresponding one-to-one with the rounded corner cutter 704, and a discharge groove drive unit 707; the main frame 1 is provided with a product output chute 101 and an empty bag conveying unit 102. The product output chute 101 is located below the discharge groove 706. The discharge groove drive unit 707 is used to drive the discharge groove 706 to rotate so as to smoothly guide the strip bag into the product output chute 101.

[0039] In practical use, the second slitting mechanism 7 adjusts the distance between the second slitting frame 701 and the transition pressure plate 702 according to the specifications of the produced strip bags through the lifting drive unit 710, ensuring smooth film tube conveying and precise slitting. After being guided by the transition pressure plate 702, the film tube is conveyed to the cutter holder 703. The second slitting drive unit 705 drives multiple rounded corner cutters 704 to move laterally synchronously, cutting the continuous film tube according to the preset bag length. At the same time, the four corners of the strip bags are rounded to avoid sharp corners scratching or snagging. The slitting strip bags fall synchronously into the corresponding discharge trough 706. If it is an empty bag, it is rejected separately by the empty bag conveying unit 102. Qualified strip bags are driven by the discharge trough drive unit 707 to rotate the discharge trough 706 and smoothly enter the product output chute 101 below, realizing the continuous operation of automated slitting, shaping and discharge, and adapting to the needs of high-speed production of multiple trains.

[0040] In addition, the second cutting mechanism 7 also includes an empty bag detection unit mounted on the cutter holder 703. Optionally, the empty bag detection unit includes multiple elastic rods 708 corresponding to each strip bag, and a detector 709 cooperating with the elastic rods 708 to detect whether there are empty bags without granular material. The specific detection principle is as follows: the elastic rods 708 move synchronously with the cutter holder 703 and come into contact with the bag body of the corresponding strip bag. When the strip bag is filled with granular material, the bag body has a certain thickness and hardness, which will form a resistance and block the elastic rods 708, causing the elastic rods 708 to produce an outward elastic displacement. When the strip bag is empty and not filled with granular material, the bag body is flat and thin without support, and the elastic rods 708 do not have obvious displacement. The detector 709 can specifically be a photoelectric sensor, which determines whether the bag is empty by detecting the displacement state of the elastic rods 708, ensuring the qualified rate of finished product packaging. The empty bags are output from the empty bag conveying unit 102.

[0041] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A multi-row strip packaging machine for granular materials, characterized in that, include: Mainframe (1); The film roll mechanism (2) is located on the back side of the main frame (1) and is used to output a whole roll of packaging film; The first slitting mechanism (3) is located on the front side of the main frame (1) and is used to uniformly slit the whole roll of packaging film along the longitudinal direction to form multiple rows of narrow films; The longitudinal sealing mechanism (4) is located on one side of the first cutting mechanism (3) and is used to longitudinally heat seal multiple narrow films to form multiple independent tubular film cylinders. The granule feeding mechanism (6) is located above the longitudinal sealing mechanism (4) and is used to quantitatively fill the tubular membrane cylinder with granular material. A transverse sealing mechanism (5) is located below the longitudinal sealing mechanism (4) and is used to seal the tubular membrane cylinder transversely before and after the filler of the particle feeding mechanism (6); The second cutting mechanism (7) is located below the horizontal sealing mechanism (5) and is used to horizontally cut the sealed film tube to form independent strip bags. The horizontal sealing mechanism (5) includes a primary horizontal sealing unit and a secondary horizontal sealing unit located below the primary horizontal sealing unit. The primary horizontal sealing unit is used to perform heat sealing operations, and the secondary horizontal sealing unit performs cold sealing operations on the same sealing position after heat sealing by the primary horizontal sealing unit.

2. The multi-row strip packaging machine for granular materials according to claim 1, characterized in that, The longitudinal sealing mechanism (4) includes a longitudinal sealing frame (401), multiple forming tubes (402), and a longitudinal sealing unit; The forming tubes (402) are spaced apart above the longitudinal sealing frame (401) and correspond one-to-one with the multiple rows of narrow films cut by the first cutting mechanism (3); The longitudinal sealing frame (401) is fixedly provided with longitudinal sealing collars (410) on the outer periphery of each forming tube (402) to guide the corresponding narrow film to wrap around the outer periphery of the forming tube (402) and form a tubular film tube; The longitudinal sealing unit is located at the lower end of the forming tube (402) and includes a movable seat (405), a longitudinal sealing drive unit (406), and multiple movable hot stamping blocks (407) and fixed hot stamping blocks (409) corresponding one-to-one with the forming tube (402). The movable heating block (407) is fixedly mounted on the movable seat (405), and has a longitudinal sealing heating tube (408) inside. The fixed heating block (409) is fixedly mounted on the longitudinal sealing frame (401) and arranged opposite to the movable heating block (407). The longitudinal sealing drive unit (406) is connected to the movable seat (405) for driving the movable seat (405) to move the movable heating block (407) closer to or away from the fixed heating block (409) so as to press the overlapping edge of the tubular membrane tube for longitudinal sealing.

3. The multi-row strip packaging machine for granular materials according to claim 2, characterized in that, Below the longitudinal sealing unit are two shaping plates (411) arranged in a V-shape, used to flatten and shape the tubular membrane tube.

4. The multi-row strip packaging machine for granular materials according to claim 2, characterized in that, The pellet feeding mechanism (6) includes a feeding frame (601), a storage bin (602) fixed on the feeding frame (601), a vacuum feeder (603) on the top of the storage bin (602), and a quantitative feeding unit on the bottom of the storage bin (602). The quantitative feeding unit includes multiple metering plates (605) corresponding to the forming tube (402), multiple feeders (604) corresponding to the metering plates (605), a scraper (607) above the metering plates (605), a feeding plate (606) below the metering plates (605), a scraper driving unit (608), and a feeding plate driving unit (609). The storage bin (602) has a discharge hole at the bottom corresponding to the metering plate (605). The metering plate (605) has a metering through hole. The feeder (604) is used to introduce granular material into the metering through hole. The scraper drive unit (608) is connected to the scraper (607) and is used to drive the scraper (607) to move so as to scrape the granular material in the metering through hole and block its upper opening. The discharge plate drive unit (609) is connected to the discharge plate (606) and is used to drive the discharge plate (606) to rotate so as to open the lower opening of the metering through hole for discharge. The pellet feeding mechanism (6) also includes a feeder drive unit (610) that is connected to the feeder (604) for driving the feeder (604) to move laterally.

5. A multi-row strip packaging machine for granular materials according to claim 4, characterized in that, The longitudinal sealing mechanism (4) also includes a vibration unit for assisting the feeding of particulate materials; The vibration unit includes two symmetrically distributed vibrators (403) and a mounting plate (404) that spans and is fixed on the top of the two vibrators (403). The forming tube (402) passes through and is fixed on the mounting plate (404). The top end of the forming tube (402) is flared and has an overlapping interface (412) that cooperates with the feeding plate (606). The vibrator (403) is used to drive the forming tube (402) and the feeding plate (606) connected thereto to vibrate synchronously to assist the feeding of granular material in the metering through hole.

6. A multi-row strip packaging machine for granular materials according to claim 1, characterized in that, The primary horizontal sealing unit includes two primary horizontal sealing mounting seats (502) arranged opposite each other. Multiple sets of opposite thermal mesh blocks (503) are provided on the opposite sides of the two primary horizontal sealing mounting seats (502). A horizontal sealing heating tube (504) is provided inside the primary horizontal sealing mounting seat (502). The secondary horizontal sealing unit includes two opposing secondary horizontal sealing mounting seats (505), and multiple sets of opposing cold mesh blocks (506) are provided on the opposite sides of the two secondary horizontal sealing mounting seats (505). One side of the cold-textured block (506) is provided with a serrated blade (507) for forming an easy-tear opening while sealing.

7. A multi-row strip packaging machine for granular materials according to claim 6, characterized in that, The horizontal sealing mechanism (5) also includes a horizontal sealing frame (501), a horizontal sealing servo unit, and a secondary horizontal sealing mounting frame (513). The horizontal sealing servo unit is used to drive the hot anilox block (503) and the cold anilox block (506) to synchronously close and press seal. It includes a horizontal sealing servo motor (508), a horizontal sealing screw (510), and a belt drive unit (509) connecting the horizontal sealing servo motor (508) and the horizontal sealing screw (510). The horizontal sealing screw (510) is provided with a nut seat (511), which is connected to the primary horizontal sealing mounting seat (502) and the secondary horizontal sealing mounting frame (513) in a transmission connection. The secondary horizontal sealing mounting seat (505) is located on the secondary horizontal sealing mounting frame (513).

8. A multi-row strip packaging machine for granular materials according to claim 7, characterized in that, The horizontal sealing mechanism (5) also includes a traction unit for pulling the tubular membrane tube after the first horizontal sealing downward to the second horizontal sealing unit; The traction unit includes a traction servo motor (515), a traction screw (516) that is driven by the traction servo motor (515), and a traction frame that is driven by the traction screw (516).

9. A multi-row strip packaging machine for granular materials according to claim 7, characterized in that, The horizontal sealing mechanism (5) also includes a bag length adjustment unit (514), an upper buffer spring (517) located at the top of the horizontal sealing machine frame (501), and a lower buffer cylinder (518) located at the bottom of the secondary horizontal sealing mounting frame (513). The bag length adjustment unit (514) is fixed on the nut seat (511) and is connected to the secondary horizontal sealing mounting frame (513) for adjusting the distance between the primary horizontal sealing unit and the secondary horizontal sealing unit to adapt to different bag length specifications. The upper buffer spring (517) and the lower buffer cylinder (518) are used to suppress the shaking of the mechanism.

Images