Feeding and pressing mechanism for packaging machines

Abstract

This utility model discloses a feeding and pressing mechanism for a packaging machine, belonging to the technical field of packaging production equipment. It aims to solve the problems of existing material bag feeding methods that use dual synchronous belt clamping, resulting in complex structures, high costs, poor feeding stability, and inadequate adhesion between the packaging fabric and the material bag. This utility model includes a frame, which is equipped with a fabric feeding assembly, a material bag conveying mechanism, a pushing robot, a pallet, and a rolling device. The material bag conveying mechanism features a double-belt conveyor structure with compartments, and a guide rail plate works in conjunction with the pushing robot to achieve precise material bag transfer. The pushing robot uses a double-crank rocker mechanism to drive a scraper to reciprocate, and the guide rail plate has a guiding and limiting structure to improve pushing accuracy. The pressure roller has an annular groove to adapt to material bag pressing. This utility model simplifies the feeding structure, reduces equipment costs, and can stably and accurately complete material bag transfer and fabric pressing, ensuring the quality of the finished package and adapting to continuous packaging operations on automated production lines.

Description

Technical Field

[0001] This utility model belongs to the field of automated packaging equipment technology, specifically relating to a feeding and pressing mechanism for a packaging machine. Background Technology

[0002] The fully automated continuous packaging production line integrates multiple production processes such as material sorting, package forming, package sealing, finished product pressing and cutting, and outer packaging.

[0003] After the material package is formed, it is sent to the packaging host to complete the sealing and cutting operation. The core process of the equipment is the precise feeding of the material package and the tight pressing of the packaging material with the material package. The bonding effect between the material and the material package directly determines the sealing performance and appearance flatness of the finished product. It is a key link to control the finished product qualification rate and the stability of the continuous operation of the production line.

[0004] The material feeding mechanism of existing packaging machines generally adopts a double synchronous belt clamping conveyor structure, which relies on two sets of synchronous belts to clamp and limit the two sides of the material bag to achieve continuous feeding operation. This structure has several obvious defects in actual production: First, the dual synchronous belt clamping conveyor requires independent clamping drive components, limit adjustment components, and synchronous calibration components. The number of parts is large, the assembly is difficult, and the equipment manufacturing and maintenance costs are high. At the same time, the whole machine occupies a lot of space, which is not conducive to the compact integration and miniaturization of the production line. Second, the synchronous belt clamping conveyor relies on the clamping force on both sides to position the material bag. It is difficult to accurately control the clamping force. If the force is too small, it will cause the material bag to shift, slip, and the feeding distance to be inconsistent. If the force is too large, it will easily squeeze and deform the material bag and damage the internal material structure. Third, the traditional feeding mechanism does not have a dedicated guide and limit structure. When the material bag is conveyed between the two layers of packaging fabric, it is very easy for the position to shift. In the subsequent pressing process, problems such as material bag misalignment and poor fabric adhesion will occur, and the defect rate of finished products after cutting will increase significantly. Fourth, the conventional pressing roller has a simple structure and no limit structure to match the shape of the material bag. During the pressing process, the fabric and the outer wall of the material bag are poorly adhered, and the finished product is prone to defects such as bulging, wrinkles, and air leakage at the sealing edge, which seriously affects the product packaging quality.

[0005] In summary, the existing feeding and pressing mechanisms of packaging machines have technical shortcomings such as cumbersome structure, high production cost, poor feeding operation stability, low pressing and positioning accuracy, and high packaging defect rate, which urgently need to be optimized and improved. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to solve the technical problems of the existing packaging machine's material feeding using a double synchronous belt clamping conveyor structure, which has a complex equipment structure, high manufacturing cost, poor feeding stability, and insufficient adaptability of the pressing structure, resulting in material bag positioning deviation, loose fabric adhesion, and high packaging defect rate.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a feeding and pressing mechanism for a packaging machine, comprising a frame, on which are mounted an outer fabric feeding shaft, a bottom fabric feeding shaft, a material bag conveying mechanism, a pushing robot, a pallet, and a rolling device. The material bag conveying mechanism includes a mounting frame, on which two sets of annularly arranged belts are symmetrically arranged. The two sets of belts are synchronously driven by the same drive motor, and a partition is fixed between the two sets of belts. Raised baffles are uniformly fixed on the surface of the belts, and adjacent baffles form compartments for accommodating material bags. Guide rails are correspondingly mounted at the output ends of both sets of belts, and the guide rails have a U-shaped opening on the side facing the belt. The guide rail plate and the support plate are fitted with bottom material guide rollers; the pushing robot includes scrapers corresponding to the guide rail plates, the scrapers are driven by a double crank rocker mechanism and perform reciprocating scraping motions along the end face of the guide rail plate; the input end side wall of the rolling device is fitted with a swing arm, the end of the swing arm is fitted with a pressure guide roller, the rolling device includes a base, the base is fitted with a bottom roller and a pressure roller that cooperate with each other, the pressure roller is driven by a cylinder to press against the surface of the bottom roller, and the peripheral wall of the pressure roller is provided with an annular groove for adapting the material package to roll and adhere.

[0008] Furthermore, the guide rail plate has a protrusion integrally formed in the middle, and guide grooves are symmetrically formed on both sides of the protrusion; the scraper has a relief groove in the middle that matches the protrusion, and scraping edges that are adapted to the guide grooves are integrally formed on both sides of the relief grooves of the scraper, and the scraping edges are slidably engaged in the inside of the guide grooves.

[0009] Furthermore, the double-crank rocker mechanism includes a vertical plate fixed to the frame, a drive crank, a limiting crank, and a connecting rod. A servo motor is fixedly mounted on the vertical plate, and the output shaft of the servo motor is coaxially fixed with the fixed end of the drive crank. The movable end of the drive crank is rotatably hinged to the tail of the connecting rod. The fixed end of the limiting crank is rotatably connected to the vertical plate via a rotating shaft, and the movable end of the limiting crank is rotatably hinged to the middle of the connecting rod. A mounting shaft is fixed to the front end of the connecting rod, and the end of the scraper is fixedly mounted on the mounting shaft.

[0010] Furthermore, both the outer fabric feeding shaft and the bottom fabric feeding shaft are damped feeding shafts, and each of the outer fabric feeding shaft and the bottom fabric feeding shaft is matched with a fabric tension adjustment component.

[0011] Furthermore, the pressing guide roller is an elastic rubber roller, and the roller surface height of the pressing guide roller is adapted to the outer fabric conveying trajectory, so as to adhere and cover the outer fabric onto the surface of the material bag.

[0012] Furthermore, the roller surfaces of the bottom roller and the pressure roller are both covered with an anti-slip elastic pad, and the width of the annular groove is adapted to the outer diameter of the material bag.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model abandons the traditional double synchronous belt clamping conveyor structure and adopts a single motor driven double belt grid conveyor structure. It does not require additional clamping and limiting components, which greatly simplifies the mechanical structure of the whole machine, reduces the number of parts, effectively reduces the production, assembly and maintenance costs of the equipment, and at the same time reduces the space occupied by the whole machine installation, making it suitable for the compact integrated layout of automated packaging production lines.

[0014] 2. This utility model relies on the baffles on the belt surface to form independent compartments, realizing the quantitative conveying of material bags at equal intervals. It is equipped with a double crank rocker mechanism to drive the scraper to accurately scrape and transfer the material. With the guide rail plate guiding and limiting structure, it completely solves the problems of slippage, material bag offset, and uneven feeding distance in traditional clamping feeding. It significantly improves the material bag feeding accuracy and running stability, ensuring that each material bag can be accurately placed between the bottom and outer packaging materials.

[0015] 3. This utility model adds an elastic pressure guide roller to the feeding end of the rolling device, which can pre-press the outer fabric flat and cover the surface of the material bag to avoid the fabric shifting or wrinkling during the conveying process; at the same time, the pressure roller has an annular groove adapted to the shape of the material bag, which can make the packaging fabric fit tightly against the outer wall of the material bag during the rolling process, improve the compression molding effect, effectively improve the defects such as finished product bulging, material bag misalignment, and poor sealing, and reduce the packaging defect rate.

[0016] 4. The double crank rocker mechanism, combined with the guide rail plate guiding and limiting structure, can drive the scraper to complete a stable reciprocating scraping action. It is precise in operation and has a fast response speed, making it suitable for high-speed continuous operation of packaging production lines. It effectively improves the overall packaging efficiency and enhances the stability of equipment operation and adaptability to product specifications.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 A perspective view of the application state of a specific embodiment of this utility model; Figure 2 This is a partial perspective view of a specific embodiment of the present utility model; Figure 3 for Figure 1 A magnified view of A in the middle.

[0019] Explanation of reference numerals in the attached drawings: 1. Mounting frame; 2. Belt; 3. Partition; 4. Baffle; 5. Compartment; 6. Guide rail plate; 7. U-shaped clearance groove; 8. Bottom fabric guide roller; 9. Scraper; 10. Swing arm; 11. Pressure guide roller; 12. Seat; 13. Bottom roller; 14. Pressure roller; 15. Annular groove; 16. Protrusion; 17. Guide groove; 18. Clearance groove; 19. Edge scraper; 20. Vertical plate; 21. Drive crank; 22. Limiting crank; 23. Connecting rod; 24. Servo motor; 25. Mounting shaft; 26. Support plate; 27. Outer fabric feeding shaft; 28. Bottom fabric feeding shaft; 29. ​​Limiting end plate. Detailed Implementation

[0020] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] like Figure 1 — Figure 3 As shown, this embodiment discloses a feeding and pressing mechanism for a packaging machine, including a frame, on which are mounted an outer fabric feeding shaft 27, a bottom fabric feeding shaft 28, a material bag conveying mechanism, a pushing robot, a pallet 26, and a rolling device. The mechanisms work together to complete the entire pre-packaging process, including packaging fabric conveying, precise material bag feeding, and pressing the double-layer fabric and material bag together.

[0022] The material bag conveying mechanism includes a mounting frame 1, on which two sets of annular belts 2 are symmetrically mounted. The two sets of belts 2 are synchronously driven by the same drive motor to ensure that the material conveying on both sides is synchronized and consistent. A partition 3 is fixed between the two sets of belts 2 to separate the conveying areas on both sides and avoid mutual interference of materials. Limiting end plates 29 are also set on both sides of the belts. Protruding baffles 4 are uniformly fixed on the surface of the belts 2, and independent compartments 5 are formed between adjacent baffles 4. Each compartment 5 can hold one material bag, realizing the equidistant, quantitative, and orderly conveying of material bags and preventing material stacking and lateral deviation. Guide rail plates 6 are fixed at the discharge end of both sets of belts 2. U-shaped clearance grooves 7 are opened on the side of the guide rail plate 6 facing the belt 2 to facilitate the smooth discharge of the material bags conveyed by the belt to the end face of the guide rail plate 6. Bottom material guide rollers 8 are rotatably mounted between the guide rail plate 6 and the pallet. The bottom material is smoothly guided and conveyed to the pallet by the bottom material guide rollers 8, completing the pre-positioning and conveying of the bottom packaging material.

[0023] The pushing robot is equipped with scrapers 9 that correspond one-to-one with the guide rails 6. The scrapers 9 are driven by a double-crank rocker mechanism and can stably reciprocate along the end face of the guide rails 6 to scrape the material accurately and push the material package on the guide rails 6 onto the bottom material of the pallet surface. The guide rails 6 have an integrally formed protrusion 16 in the middle, and guide grooves 17 are symmetrically formed on both sides of the protrusion 16. The scraper 9 has a clearance groove 18 in the middle that matches the protrusion 16. The scraper edges 19 are integrally formed on both sides of the clearance groove 18 of the scraper 9. The scraper edges 19 slide and engage inside the guide grooves 17. When the scraper 9 reciprocates, the scraper edges slide along the guide grooves to limit their movement, which greatly improves the stability and positioning accuracy of the scraper scraping action and prevents scraping deviation, jamming and other issues.

[0024] The double-crank rocker mechanism consists of a vertical plate 20, a drive crank 21, a limiting crank 22, and a connecting rod 23. The vertical plate 20 is fixedly mounted on the frame, and a servo motor 24 is fixed to the side wall of the vertical plate 20. The output shaft of the servo motor 24 is coaxially connected to the fixed end of the drive crank 21. The movable end of the drive crank 21 is rotatably hinged to the tail of the connecting rod 23. The fixed end of the limiting crank 22 is rotatably mounted on the vertical plate 20 via a rotating shaft, and the movable end of the limiting crank 22 is hinged to the middle of the connecting rod 23. The front end of the connecting rod 23 is fixedly mounted on a mounting shaft 25, and two scraper plates 9 are respectively fixedly assembled at both ends of the mounting shaft 25. When the equipment is running, the servo motor 24 drives the drive crank 21 to rotate. Under the constraint and limiting action of the limiting crank 22, the drive connecting rod 23 performs a stable plane reciprocating swing, which in turn drives the scraper 9 to accurately complete the material pack pushing action along the end face of the guide plate 6. The scraping stroke and running speed can be precisely adjusted by the servo motor 24 to adapt to the packaging production needs of material packs of different sizes and specifications.

[0025] The rolling device is responsible for bonding and pressing the double-layer packaging fabric with the package. A swing arm 10 is fixed to the feed side wall of the rolling device, and a pressing guide roller 11 is rotatably mounted at the end of the swing arm 10. The pressing guide roller 11 is an elastic rubber roller that can adaptively conform to the fabric surface, pressing the outer fabric flatly onto the package surface and preventing wrinkles and misalignment. The rolling device includes a base 12, on which are mounted paired bottom rollers 13 and pressure rollers 14. The pressure roller 14 is driven to rise and fall by a cylinder, adaptively pressing and conforming to the surface of the bottom roller 13, adapting to the bonding requirements of fabrics and packages of different thicknesses. An annular groove 15 is formed on the outer wall of the pressure roller 14. The width of the annular groove 15 precisely matches the outer diameter of the package. During the pressing operation, the package is inserted into the annular groove 15, ensuring that the bottom and outer fabrics are tightly bonded to the outer wall of the package, guaranteeing a flat and tightly sealed finished product after pressing.

[0026] Further optimization: Both the outer fabric feeding shaft and the bottom fabric feeding shaft adopt damped feeding shafts, equipped with a fabric tension adjustment component. This allows for real-time adjustment of the fabric conveying tension, preventing fabric from becoming loose and wrinkled or breaking due to excessive tension, ensuring smooth conveying of the packaging fabric throughout the process. The bottom roller 13 and pressure roller 14 are both covered with an anti-slip elastic padding layer to increase the fabric contact friction, prevent fabric slippage during pressing, and buffer the squeezing force to avoid rigid compression damage to the fabric and packaging.

[0027] The overall workflow of this utility model is as follows: the outer fabric roll is assembled to the outer fabric feeding shaft, and the bottom fabric roll is assembled to the bottom fabric feeding shaft; the bottom fabric is guided and conveyed to the surface of the pallet by the bottom fabric guide roller 8, and continuously conveyed forward into the rolling device; the outer fabric is pressed and guided by the pressing guide roller 11 and then synchronously fed into the rolling device. The material bag is fed into the compartment 5 by the upstream material distributor and vibrating feeding mechanism, and is synchronously conveyed forward with the belt 2, and is smoothly discharged to the end face of the guide plate 6 through the U-shaped relief groove 7; the servo motor 24 drives the double crank rocker mechanism to rotate, driving the scraper 9 to accurately scrape and push the material along the guide plate 6, and smoothly place the material bag on the bottom fabric on the surface of the pallet, completing the precise laying of the material bag. The bottom fabric of the material package and the top outer fabric are simultaneously conveyed to the bottom roller 13 and the pressure roller 14. They are pressed together by the limiting groove 15. The two layers of packaging fabric tightly wrap the material package, completing the entire feeding and pressing process. The package is then conveyed to the cutting, sealing and finished product unloading stations to complete the entire packaging process.

Claims

1. A feeding and pressing mechanism for a packaging machine, comprising a frame, wherein the frame is provided with an outer fabric feeding shaft (27), a bottom fabric feeding shaft (28), a material bag conveying mechanism, a pushing robot, a pallet (26), and a rolling device, characterized in that: The material bag conveying mechanism includes a mounting frame (1), on which two sets of annularly arranged belts (2) are symmetrically arranged. The two sets of belts (2) are synchronously driven by the same drive motor. A partition (3) is fixed between the two sets of belts (2). A raised baffle (4) is uniformly fixed on the surface of the belt (2). A compartment (5) for accommodating the material bag is formed between adjacent baffles (4). A guide plate (6) is installed at the output end of each of the two sets of belts (2). A U-shaped relief groove (7) is opened on the side of the guide plate (6) facing the belt (2). A bottom material guide roller (8) is assembled between the guide plate (6) and the pallet. The pushing robot includes a scraper (9) corresponding to the guide plate (6). The scraper (9) is driven by a double crank rocker mechanism and performs a reciprocating scraping action along the end face of the guide plate (6).

2. The feeding and pressing mechanism for a packaging machine according to claim 1, characterized in that: The rolling device includes a base (12), on which a bottom roller (13) and a pressure roller (14) are fitted together. The pressure roller (14) is driven by a cylinder to press against the surface of the bottom roller (13). The peripheral wall of the pressure roller (14) is provided with an annular groove (15) for adapting the material package to roll and adhere.

3. The feeding and pressing mechanism for a packaging machine according to claim 1, characterized in that: The guide plate (6) has a protrusion (16) integrally formed in the middle, and guide grooves (17) are symmetrically formed on both sides of the protrusion (16); the scraper (9) has a relief groove (18) in the middle that matches the protrusion (16), and scraper edges (19) that are adapted to the guide grooves (17) are integrally formed on both sides of the relief grooves (18) of the scraper (9), and the scraper edges (19) are slidably engaged in the inside of the guide grooves (17).

4. The feeding and pressing mechanism for a packaging machine according to claim 1, characterized in that: The double crank rocker mechanism includes a vertical plate (20) fixed on the frame, a drive crank (21), a limiting crank (22), and a connecting rod (23). The vertical plate (20) is fixedly equipped with a servo motor (24). The output shaft of the servo motor (24) is coaxially fixed with the fixed end of the drive crank (21). The movable end of the drive crank (21) is rotatably hinged to the tail of the connecting rod (23). The fixed end of the limiting crank (22) is rotatably connected to the vertical plate (20) through a rotating shaft. The movable end of the limiting crank (22) is rotatably hinged to the middle of the connecting rod (23). The front end of the connecting rod (23) is fixedly equipped with a mounting shaft (25). The end of the scraper (9) is fixedly mounted on the mounting shaft (25).

5. The feeding and pressing mechanism for a packaging machine according to claim 1, characterized in that: Both the outer fabric feeding shaft and the bottom fabric feeding shaft are damped feeding shafts, and each of the outer fabric feeding shaft and the bottom fabric feeding shaft is matched with a fabric tension adjustment component.

6. The feeding and pressing mechanism for a packaging machine according to claim 2, characterized in that: The roller surfaces of the bottom roller (13) and the pressure roller (14) are covered with an anti-slip elastic pad, and the groove width of the annular groove (15) is adapted to the outer diameter of the material bag.

7. The feeding and pressing mechanism for a packaging machine according to claim 1, characterized in that: The input end sidewall of the rolling device is equipped with a swing arm (10), and the end of the swing arm (10) is equipped with a pressure guide roller (11).

8. The feeding and pressing mechanism for a packaging machine according to claim 7, characterized in that: The pressing guide roller (11) is an elastic rubber roller. The roller surface height of the pressing guide roller (11) is adapted to the outer fabric conveying trajectory and is used to adhere and cover the outer fabric onto the surface of the material bag.

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