Medical dressing packaging equipment

Abstract

The invention discloses medical dressing packaging equipment which solves the problems that in the existing medical dressing packaging technology, the sealing quality is poor due to the fact that the thickness of a packaging film is uneven, and the conveying and positioning precision of materials in special forms is low. A rotatable upper clamping jaw and a rotatable lower clamping jaw are arranged on the corresponding chain plates to form a conveying unit; the conveying unit is opened through a clamping jaw at the feeding station, and gravity feeding of materials is achieved. The sealing device further comprises a sealing mechanism which adopts a self-adaptive heat-sealing roller assembly, and the assembly is provided with a plurality of floating compensation rings capable of independently and radially displacing and provided with pre-tightening force by an elastic piece. By means of the structure, high-precision conveying and positioning of materials in special forms are achieved, the film thickness difference can be dynamically compensated, the reliability and consistency of sealing quality are remarkably improved, meanwhile, the mechanical structure is simplified, and the overall production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and in particular to a medical dressing packaging equipment. Background Art

[0002] Medical dressings, especially sterile dressings, place extremely high demands on the sealing and integrity of their packaging to ensure their sterility throughout their shelf life. Currently, the industry generally uses hot-press sealing equipment to automate the packaging of these products. However, existing equipment still suffers from the following technical deficiencies, despite the pursuit of high efficiency, flexibility, and reliability in modern production: The uniformity and stability of sealing quality are difficult to ensure. Existing equipment's heat-sealing mechanisms typically use a constant-pressure sealing method. However, during the production and transportation process, packaging film materials inevitably have thickness tolerances or local wrinkles. When the rigid heat-sealing components press over these uneven areas, they can easily cause excessive local pressure, burning through the film, or insufficient local pressure, resulting in a weak seal, posing a safety hazard to the product's sterile barrier.

[0003] Furthermore, the conveying and positioning accuracy for materials with unusual shapes is low. For example, for materials with regular but cylindrical shapes that are prone to rolling, such as bandage rolls, traditional flat conveyor belts or push-block feeding mechanisms struggle to maintain a stable and precise position. At relatively high speeds, the material can easily deflect and roll, resulting in an inconsistent final position within the package, impacting product quality and even interfering with the subsequent sealing process.

[0004] In addition, the functional integration of existing equipment is not high, and the level of automation needs to be improved. Some high-end dressings require online reading of traceability codes or adjustment of specific orientations, that is, scanning codes and entering information during the packaging process. Most existing equipment does not have the function of rotating and positioning materials in situ during the packaging process, and additional steps need to be added to scan codes or adjust material positions, resulting in lengthy production lines and low efficiency. Therefore, there is an urgent need for a medical dressing packaging device. Summary of the Invention

[0005] The purpose of the present invention is to solve the defects in the prior art and to propose a medical dressing packaging device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A medical dressing packaging device includes a frame, wherein the frame is provided with a film supply mechanism for supplying packaging film, a material conveying mechanism, and a sealing mechanism; the material conveying mechanism includes: An upper conveying chain and a lower conveying chain composed of a plurality of mutually hinged chain plates, wherein the upper conveying chain and the lower conveying chain move synchronously along a predetermined path and form a conveying gap therebetween; At least one conveying unit is provided at intervals along the length direction of the upper conveying chain and the lower conveying chain, each conveying unit includes an upper clamping jaw and a lower clamping jaw, the upper clamping jaw is mounted on the chain plate of the upper conveying chain, and the lower clamping jaw is mounted on the corresponding chain plate of the lower conveying chain, and the upper clamping jaw and the lower clamping jaw jointly define a clamping space for carrying materials to be packaged; A feeding station is provided on a predetermined path of the material conveying mechanism, and the upper clamping jaw and the lower clamping jaw are controlled to open at the feeding station so that the material is separated from the conveying unit and enters the package formed by the film feeding mechanism.

[0007] Furthermore, the sealing mechanism includes at least one heat sealing roller assembly, which includes a main rotating shaft and at least one floating compensation ring arranged side by side along the axial direction of the main rotating shaft. Each of the floating compensation rings can move radially relative to the main rotating shaft, and a radial preload is provided by an elastic member.

[0008] Furthermore, between the outlet of the material conveying mechanism and the inlet of the sealing mechanism, there are provided at least one set of guide rollers for gathering and guiding the packaging film, and a transition support plate for temporarily supporting the material between the guide rollers and the sealing mechanism.

[0009] Furthermore, the outer circumferential surface of each floating compensation ring of the heat sealing roller assembly is processed with a sealing protrusion, and the sealing protrusion is provided with a heat sealing surface and a vacuum adsorption surface with micropores in sequence along the rotation direction.

[0010] Furthermore, the sealing mechanism further comprises at least one pair of synchronous side sealing modules, the synchronous side sealing modules being used to longitudinally seal the sides of the package while the heat sealing roller assembly transversely seals the package; Each of the synchronous side sealing modules is composed of a fixed functional slot plate and a driven member. The driven member is linked to the main rotating shaft of the heat sealing roller assembly and slides in the functional slot plate.

[0011] Furthermore, the upper clamping jaw and the lower clamping jaw are both mounted on the corresponding chain plates via a rotating shaft, and are driven by an independent motor to rotate around the rotating shaft.

[0012] Furthermore, a rejection station is provided on the path of the material conveying mechanism, at which the upper jaw and the lower jaw are controlled to produce micro-movement to reduce the clamping force, and the material in the conveying unit is blown out by a pneumatic nozzle.

[0013] Furthermore, the feeding station is provided with an electromagnet, and the opening of the upper jaw and the lower jaw is triggered by the magnetic force generated after the electromagnet is energized; wherein, the upper jaw and the lower jaw tend to close under the action of a spring, and the magnetic force generated by the electromagnet overcomes the elastic force of the spring to open the upper jaw or the lower jaw.

[0014] Furthermore, among the upper jaw and the lower jaw, one is an active jaw and the other is a driven jaw; wherein the active jaw is provided with a retractable friction roller driven by a motor, and the driven jaw is provided with an unpowered rolling body for in-situ rotational positioning of the material.

[0015] Furthermore, the sealing mechanism further comprises a fixed self-cleaning scraper, and scraping teeth of the self-cleaning scraper are inserted into the gap between adjacent floating compensation rings.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By adopting an adaptive heat-sealing roller assembly and combining it with multiple floating compensation rings and elastic parts that can independently move radially, it is possible to dynamically compensate for differences in packaging film thickness, ensuring uniform distribution of sealing pressure along the entire sealing line. This avoids problems such as false sealing and burn-through caused by uneven film thickness, thereby improving product sterility and yield.

[0017] The conveying unit, composed of upper and lower double conveyor chains and rotating clamps, can stably clamp materials (especially cylindrical materials such as bandage rolls) from multiple dimensions, preventing rolling and deflection of materials during high-speed conveying. This ensures that each material arrives at the feeding station in a highly consistent posture, improving the aesthetics and quality of the packaging. By integrating an active rotation positioning module into the gripper, the material can be rotated in situ without adding additional workstations, meeting the needs of complex processes such as barcode reading and feature alignment. At the same time, the motor-driven opening and closing of the gripper can quickly adapt to materials of different sizes, enhancing the intelligence level and multi-tasking adaptability of the equipment. By replacing the independent pushing mechanism with a collaborative feeding structure and integrating the horizontal and vertical sealing into one station through the synchronous side sealing module, the mechanical structure is simplified, the failure points are reduced, and the packaging efficiency of the entire machine is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0019] Figure 1 This is one of the overall structural schematic diagrams of the medical dressing packaging equipment proposed in the present invention; Figure 2 This is the second schematic diagram of the overall structure of the medical dressing packaging equipment proposed by the present invention; Figure 3 This is a structural schematic diagram of the material conveying mechanism of the medical dressing packaging equipment proposed in the present invention; Figure 4 This is a structural schematic diagram of the heat-sealing roller assembly of the medical dressing packaging equipment proposed by the present invention; Figure 5 A front view of the medical dressing packaging device proposed by the present invention; Figure 6 A schematic structural diagram of the synchronous side sealing module of the medical dressing packaging device proposed in the present invention; Figure 7 This is a schematic structural diagram of the chain plate of the medical dressing packaging equipment proposed in the present invention.

[0020] In the figure: 10, frame; 20, film supply mechanism; 30, material conveying mechanism; 40, sealing mechanism; 50, feeding station; 60, rejection station; 31, upper conveyor chain; 32, lower conveyor chain; 33, chain plate; 34, conveying unit; 35, upper clamp; 36, lower clamp; 37, clamping space; 38, rotating shaft; 41, heat sealing roller assembly; 42, main rotating shaft; 43, floating compensation ring; 44, elastic member; 45, guide roller; 46, transition support plate; 47, sealing protrusion; 471, heat sealing surface; 472, vacuum adsorption surface; 48, synchronous side sealing module; 481, functional slot plate; 482, follower; 49, self-cleaning scraper. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0023] Reference Figure 1-7 A medical dressing packaging device includes a frame 10 as an installation base, on which are arranged in sequence a film supply mechanism 20 responsible for providing packaging materials, a material conveying mechanism 30 responsible for accurately conveying products, and a sealing mechanism 40 responsible for final packaging molding.

[0024] Example 1 Reference Figure 1-7 A medical dressing packaging device includes a frame 10, on which are mounted a film supply mechanism 20, a material conveying mechanism 30, and a sealing mechanism 40. The material conveying mechanism 30 includes an upper conveying chain 31 and a lower conveying chain 32 that move synchronously. Both conveying chains are composed of a plurality of rigid chain plates 33 hinged to each other by pins. An upper clamping jaw 35 and a lower clamping jaw 36 are respectively mounted on the corresponding chain plates 33 of the upper and lower conveying chains. The clamping jaws together constitute a conveying unit 34 and define a clamping space 37 for carrying materials. Each clamping jaw is driven by an independent micro-servo motor, so that the opening and closing angle, speed, and clamping force of each clamping jaw can be precisely programmed and controlled by a central control system PLC. Multiple conveying units 34 are arranged at intervals along the length direction of the conveying chain. In one specific implementation, materials such as bandage rolls are placed in the clamping space 37 formed by the upper clamp 35 and the lower clamp 36, and are driven by the upper conveying chain 31 and the lower conveying chain 32 to advance along a preset path. At the end of the path, a feeding station 50 is provided. When the conveying unit 34 reaches the station, its upper clamp 35 and lower clamp 36 are driven by the control system to rotate open, and the clamping space 37 disappears. Under the action of gravity, the material is accurately separated from the conveying unit 34 and falls into the package that has been pre-prepared by the film supply mechanism 20 below, thereby realizing a coordinated feeding action without the need for an independent pushing mechanism.

[0025] The specific process is as follows: at the starting end of the conveyor mechanism, the upper and lower jaws 35 and 36 open to receive material, such as a bandage roll, placed by the loading mechanism. Subsequently, the motor drives the jaws to rotate and close, securing the material securely within the clamping space 37 defined by them with a predetermined clamping force. The upper and lower conveyor chains 31 and 32 then start moving, driving all conveyor units 34 forward smoothly along the predetermined path.

[0026] A rejection station can be set up along the conveying path. Connected upstream to a visual inspection system, if a conveying unit 34 is identified as defective, when the unit reaches the rejection station 60, the control system instructs the motors of the upper and lower jaws 35 and 36 to rotate slightly in the opposite direction, instantly reducing the clamping force. Simultaneously, a pneumatic nozzle located on the side of the material face ejects a high-pressure airflow, blowing loose defective products off the conveyor line and into a recycling bin. When the conveying unit 34 reaches the feeding station 50 at the end of the path, its track begins to tilt downward. When it reaches the lowest point, the control system triggers the jaws to open. This triggering is performed by an electromagnet, and the jaws are held closed by a spring by default. When the feeding point is reached, a fixed electromagnet is energized, and its magnetic force overcomes the spring force, driving the jaws to rotate open. The material then falls precisely into the package formed by the film feed mechanism 20 below under the action of gravity.

[0027] Example 2 Based on the first embodiment, the sealing mechanism 40 includes an adaptive heat-sealing roller assembly 41, which comprises a main rotating shaft 42, on which are mounted a plurality of floating compensation rings 43 arranged side by side along its axial direction. Each floating compensation ring 43 is backed by a disc spring 44, providing an independent radial preload. During operation, when uneven film thickness is encountered, the corresponding floating compensation ring 43 automatically moves radially to compensate for pressure and ensure sealing quality. A fixed self-cleaning scraper 49 is also provided, whose teeth penetrate the gaps between the floating compensation rings 43 for continuous cleaning. In a preferred embodiment, the outer surface of each floating compensation ring 43 is also processed into a sealing protrusion 47, and the sealing protrusion 47 is provided with a heat sealing surface 471 and a vacuum adsorption surface 472 with micropores in sequence along the rotation direction, thereby achieving vacuum adsorption and stable guidance of the packaging film while completing the heat sealing.

[0028] After the package enters the core sealing area, it is sealed both horizontally and vertically. The horizontal sealing is accomplished by the adaptive heat-sealing roller assembly 41, which is symmetrically arranged vertically. The rotation of the rollers "pulls" the entire packaging film forward through friction. When the gap between the products reaches the gap between the rollers, the rollers flatten the package, completing the heat seal and severing. During the vertical sealing, when the main shaft 42 rotates, the follower 482 on it rotates with it. Because the follower is constrained within the curved groove of the fixed functional slot plate 481, its rotational motion is converted by the mechanism into reciprocating linear motion, thereby driving the side seal head to complete a press and retract action on the side of the package. Because one rotation of the main shaft completes a single horizontal seal, the horizontal and vertical sealing actions are perfectly mechanically synchronized.

[0029] Example 3 Based on Example 1, in the material conveying mechanism 30, a group of V-shaped closing guide rollers 45 and a transition support plate 46 are provided between the outlet of the material conveying mechanism 30 and the inlet of the sealing mechanism 40, for final centering, converging and supporting the packaging film and the material.

[0030] A rejection station 60 is provided on the conveying path. When defective products are detected, the clamping jaws of the corresponding conveying unit 34 will be controlled to loosen slightly to reduce the clamping force, and then a pneumatic nozzle will blow air from the end face of the material to remove the defective products. If the material needs to be rotated and positioned, the conveying unit 34 stops moving forward or performs this action while moving forward, and the telescopic mechanism on the active clamping jaw is started to extend the friction roller and press it against the side of the material. Subsequently, the friction roller is driven by setting the start of the micro motor, and the material roll is rotated by friction. When the visual sensor above detects that the material roll has rotated to the target angle, the motor stops and the friction roller retracts. During the whole process, the other side of the material roll rolls smoothly on the unpowered rolling element of the driven clamping jaw with minimal resistance.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A medical dressing packaging device, comprising a frame (10), wherein the frame (10) is provided with a film supply mechanism (20) for supplying packaging film, a material conveying mechanism (30) and a sealing mechanism (40), wherein: The material conveying mechanism (30) comprises: An upper conveying chain (31) and a lower conveying chain (32) are composed of a plurality of mutually hinged chain plates (33), wherein the upper conveying chain (31) and the lower conveying chain (32) move synchronously along a predetermined path and form a conveying gap therebetween; At least one conveying unit (34) is provided at intervals along the length direction of the upper conveying chain (31) and the lower conveying chain (32), each conveying unit (34) includes an upper clamping jaw (35) and a lower clamping jaw (36), the upper clamping jaw (35) is mounted on the chain plate (33) of the upper conveying chain (31), and the lower clamping jaw (36) is mounted on the corresponding chain plate (33) of the lower conveying chain (32), and the upper clamping jaw (35) and the lower clamping jaw (36) jointly define a clamping space (37) for carrying materials to be packaged; A feeding station (50) is provided on a predetermined path of the material conveying mechanism (30), and the upper clamping jaw (35) and the lower clamping jaw (36) are controlled to open at the feeding station (50) so that the material is separated from the conveying unit (34) and enters the package formed by the film supply mechanism (20).

2. The medical dressing packaging device according to claim 1, characterized in that: The sealing mechanism (40) includes at least one heat-sealing roller assembly (41), and the heat-sealing roller assembly (41) includes a main rotating shaft (42) and at least one floating compensation ring (43) arranged axially side by side along the main rotating shaft (42). Each of the floating compensation rings (43) can move radially relative to the main rotating shaft (42) and is provided with radial pre-tightening force by an elastic member (44).

3. The medical dressing packaging device according to claim 1, characterized in that: At least one set of guide rollers (45) for gathering and guiding the packaging film, and a transition support plate (46) for temporarily supporting the material between the guide rollers (45) and the sealing mechanism (40) are provided between the outlet of the material conveying mechanism (30) and the inlet of the sealing mechanism (40).

4. The medical dressing packaging device according to claim 2, characterized in that: The outer circumferential surface of each floating compensation ring (43) of the heat-sealing roller assembly (41) is processed with a sealing protrusion (47), and the sealing protrusion (47) is provided with a heat-sealing surface (471) and a vacuum adsorption surface (472) with micropores in sequence along the rotation direction.

5. The medical dressing packaging device according to claim 2, characterized in that: The sealing mechanism (40) further comprises at least one pair of synchronous side sealing modules (48), wherein the synchronous side sealing modules (48) are used to longitudinally seal the side edges of the package while the heat sealing roller assembly (41) transversely seals the package. Each of the synchronous side sealing modules (48) is composed of a fixed functional slot plate (481) and a driven member (482), wherein the driven member (482) is linked to the main rotating shaft (42) of the heat sealing roller assembly (41) and slides in the functional slot plate (481).

6. The medical dressing packaging device according to claim 1, characterized in that: The upper clamping jaw (35) and the lower clamping jaw (36) are both mounted on the corresponding chain plate (33) via a rotating shaft (38), and are driven by an independent motor to rotate around the rotating shaft (38).

7. The medical dressing packaging device according to claim 1, characterized in that: A rejection station (60) is also provided on the path of the material conveying mechanism (30). At the rejection station (60), the upper clamping jaw (35) and the lower clamping jaw (36) are controlled to produce micro-movement to reduce the clamping force, and the material in the conveying unit (34) is blown out by a pneumatic nozzle.

8. The medical dressing packaging device according to claim 1, characterized in that: The feeding station (50) is provided with an electromagnet, and the opening of the upper clamping jaw (35) and the lower clamping jaw (36) is triggered by the magnetic force generated by the electromagnet after being energized; wherein, the upper clamping jaw (35) and the lower clamping jaw (36) are both acted upon by a spring and tend to close, and the magnetic force generated by the electromagnet overcomes the elastic force of the spring to open the upper clamping jaw (35) or the lower clamping jaw (36).

9. The medical dressing packaging device according to claim 1, characterized in that: Among the upper clamping jaw (35) and the lower clamping jaw (36), one is an active clamping jaw and the other is a driven clamping jaw; wherein the active clamping jaw is provided with a retractable friction roller driven by a motor, and the driven clamping jaw is provided with an unpowered rolling body for in-situ rotation positioning of the material.

10. The medical dressing packaging device according to claim 2, characterized in that: The sealing mechanism (40) further comprises a fixed self-cleaning scraper (49), wherein scraping teeth of the self-cleaning scraper (49) are inserted into the gap between adjacent floating compensation rings (43).

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