Medical dressing packaging apparatus

Abstract

The application discloses a medical dressing packaging equipment, solves the problem of poor sealing quality caused by uneven thickness of the packaging film and low positioning accuracy of special-shaped material conveying in the existing medical dressing packaging technology, and comprises a material conveying mechanism which is composed of upper and lower conveying chains formed by a plurality of hinged chain plates, and rotatable upper and lower clamping jaws are arranged on the corresponding chain plates to form a conveying unit; the conveying unit is opened by the clamping jaws at a material feeding station, and gravity feeding of the material is realized. The application also comprises a sealing mechanism which adopts a self-adaptive heat sealing roller assembly, the assembly is provided with a plurality of floating compensation rings which can be independently radially displaced and are provided with pre-tightening force by elastic members. Through the above structure, the application realizes high-precision conveying and positioning of special-shaped materials, can dynamically compensate the film thickness difference, significantly improves the reliability and consistency of the sealing quality, simultaneously simplifies the mechanical structure, and improves the overall production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging equipment, in particular to a medical dressing packaging equipment. BACKGROUND

[0002] In order to ensure the sterile state of the medical dressing, especially the sterile dressing, within the effective period, the sealing and integrity of the packaging have a very high requirement. At present, the industry generally uses heat sealing packaging equipment to complete the automatic packaging of such products. However, under the demand of modern production of high efficiency, high flexibility and high reliability, the existing technology still has the following technical defects:

[0003] The uniformity and stability of the sealing quality are difficult to guarantee. The heat sealing mechanism of the existing equipment usually adopts a constant pressure sealing method, but the thickness tolerance or local wrinkles of the packaging film material will inevitably exist in the production and conveying process. When the rigid heat sealing part is pressed through these uneven areas, it is easy to cause local overpressure and burn through the film material, or local underpressure and form a virtual seal, which leaves a safety hazard for the sterile barrier of the product.

[0004] In addition, the positioning accuracy of the special shaped material is low. For example, for the bandage roll and other regular shaped but cylindrical and easy to roll materials, the traditional flat conveying belt or push block type feeding mechanism is difficult to realize stable and accurate posture retention. Under the condition of relatively high speed operation, the material is easy to deviate and roll, resulting in inconsistent final position of the material in the packaging, affecting the product quality, and even interfering with the subsequent sealing process.

[0005] In addition, the functional integration of the existing equipment is not high, and the automation level needs to be improved. Some high-end dressings need to read the traceability code or adjust the specific orientation online, that is, to scan the code and input the information during the packaging process. The existing equipment mostly does not have the function of in-situ rotation positioning of the material in the packaging process, and needs to add an additional process to scan the code or adjust the position of the material, resulting in a long production line and low efficiency. Therefore, a medical dressing packaging equipment is urgently needed. SUMMARY

[0006] The purpose of the present application is to solve the defects in the prior art and provide a medical dressing packaging equipment.

[0007] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0008] A medical dressing packaging equipment, comprising a rack, the rack is respectively provided with a film supply mechanism for supplying packaging film, a material conveying mechanism and a sealing mechanism; the material conveying mechanism comprises:

[0009] An upper conveying chain and a lower conveying chain composed of a plurality of mutually hinged chain plates, the upper conveying chain and the lower conveying chain moving synchronously along a predetermined path and forming a conveying gap therebetween;

[0010] At least one conveying unit is provided along the length direction of the upper conveying chain and the lower conveying chain, each of the conveying units comprising an upper clamping jaw and a lower clamping jaw, the upper clamping jaw being mounted on a chain plate of the upper conveying chain, the lower clamping jaw being mounted on a corresponding chain plate of the lower conveying chain, the upper clamping jaw and the lower clamping jaw jointly defining a clamping space for carrying the material to be packaged.

[0011] A feeding station is provided on the predetermined path of the material conveying mechanism, the upper clamping jaw and the lower clamping jaw being controlled to open at the feeding station so as to make the material to be packaged to be separated from the conveying unit and enter the package formed by the film supplying mechanism.

[0012] Further, the sealing mechanism comprises at least one heat sealing roller assembly, the heat sealing roller assembly comprising a main shaft and at least one floating compensation ring arranged axially along the main shaft, each of the floating compensation rings being movable radially relative to the main shaft and being provided with a radial pre-tightening force by an elastic member.

[0013] Further, at least one set of guide rollers for collecting and guiding the packaging film and a transition support plate for temporarily supporting the material between the guide rollers and the sealing mechanism are further provided between the outlet of the material conveying mechanism and the inlet of the sealing mechanism.

[0014] Further, an outer circumferential surface of each of the floating compensation rings of the heat sealing roller assembly is processed with a sealing protrusion, the sealing protrusion being sequentially provided with a heat sealing surface and a vacuum adsorption surface with micro-holes in the rotation direction.

[0015] Further, the sealing mechanism further comprises at least one pair of synchronous side sealing modules, the synchronous side sealing modules being used for longitudinally sealing the side edges of the package while the heat sealing roller assembly transversely seals the package.

[0016] Each of the synchronous side sealing modules is composed of a fixed functional groove plate and a driven member, the driven member being linked with the main shaft of the heat sealing roller assembly and sliding in the functional groove plate.

[0017] Further, the upper clamping jaw and the lower clamping jaw are mounted on the corresponding chain plates through a rotating shaft and are driven by independent motors to rotate the clamping jaws around the rotating shaft.

[0018] Further, the material conveying mechanism is further provided with a rejection station, at which the upper and lower clamping jaws are controlled to produce micro-motion to reduce the clamping force, and the material in the conveying unit is blown out by a pneumatic nozzle.

[0019] Further, the feeding station is provided with an electromagnet, and the opening of the upper and lower clamping jaws is triggered by the magnetic force generated after the electromagnet is energized; wherein the upper and lower clamping jaws are both subject to the action of a spring to tend to close, and the magnetic force generated by the electromagnet overcomes the elastic force of the spring to make the upper or lower clamping jaw open.

[0020] Further, among the upper and lower clamping jaws, one is a driving clamping jaw and the other is a driven clamping jaw; wherein the driving clamping jaw is provided with a retractable friction roller driven by a motor, and the driven clamping jaw is provided with a non-powered rolling body for in-situ rotational positioning of the material.

[0021] Further, the sealing mechanism further comprises a fixed self-cleaning scraper, and the scraping teeth of the self-cleaning scraper are inserted into the gap between adjacent floating compensation rings.

[0022] Compared with the prior art, the beneficial effects of the present application are that:

[0023] By adopting the self-adaptive heat sealing roller assembly, cooperating with a plurality of floating compensation rings and elastic members which can be independently radially displaced, the thickness difference of the packaging film can be dynamically compensated, the uniform distribution of the sealing pressure on the entire sealing line is ensured, thereby avoiding the problems of virtual sealing and hot piercing caused by uneven film thickness, and improving the sterile protection and yield of the product.

[0024] By adopting the conveying unit composed of the upper and lower conveying chains and the rotating clamping jaws, the material (especially cylindrical material such as bandage roll) can be stably clamped from multiple dimensions, the rolling and deflection of the material during high-speed conveying are avoided, the posture of each material reaching the feeding station is highly consistent, and the appearance and quality of the packaging are improved.

[0025] By integrating the active rotational positioning module on the clamping jaw, the material can be rotated in situ without increasing additional stations, which meets the needs of complex processes such as barcode reading and feature alignment, and at the same time, the clamping jaw can be quickly opened and closed by the motor drive, which can quickly adapt to materials of different sizes, and enhances the intelligent level and multi-task adaptability of the equipment.

[0026] By replacing the independent pushing mechanism with the cooperative feeding structure, and integrating the horizontal and vertical sealing in 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 DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of the specification, illustrate embodiments of the application and are used to explain the application, but are not intended to limit the application.

[0028] Figure 1 Overall structure schematic view of the medical dressing packaging equipment according to the present application;

[0029] Figure 2 Overall structure schematic view of the medical dressing packaging equipment according to the present application;

[0030] Figure 3 Structure schematic view of the material conveying mechanism of the medical dressing packaging equipment according to the present application;

[0031] Figure 4 Structure schematic view of the heat-sealing roller assembly of the medical dressing packaging equipment according to the present application;

[0032] Figure 5 Front view of the medical dressing packaging equipment according to the present application;

[0033] Figure 6 Structure schematic view of the synchronous side sealing module of the medical dressing packaging equipment according to the present application;

[0034] Figure 7 Structure schematic view of the chain plate of the medical dressing packaging equipment according to the present application.

[0035] In the drawings: 10, frame; 20, film supply mechanism; 30, material conveying mechanism; 40, sealing mechanism; 50, material feeding station; 60, rejection station; 31, upper conveying chain; 32, lower conveying chain; 33, chain plate; 34, conveying unit; 35, upper clamping jaw; 36, lower clamping jaw; 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 groove plate; 482, driven member; 49, self-cleaning scraper. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0037] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] Referring to Figures 1-7 A medical dressing packaging equipment includes a rack 10 as a mounting base, on which 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 forming are sequentially arranged.

[0039] Embodiment one

[0040] Referring to Figures 1-7 A medical dressing packaging equipment includes a rack 10, on which a film supply mechanism 20, a material conveying mechanism 30 and a sealing mechanism 40 are mounted, the material conveying mechanism 30 includes synchronously moving upper and lower conveying chains 31 and 32, both of which are composed of a plurality of rigid chain plates 33 hingedly connected to each other by pins, on corresponding chain plates 33 of the upper and lower conveying chains, upper and lower clamping jaws 35 and 36 are respectively mounted, the clamping jaws jointly form a conveying unit 34 and define a clamping space 37 for carrying materials, wherein each clamping jaw is driven by an independent micro servo motor, so that the opening angle, speed and clamping force of each clamping jaw can be accurately programmed and controlled by a central control system PLC.

[0041] A plurality of conveying units 34 are arranged at intervals along the length direction of the conveying chains, in a specific implementation, a material such as a bandage roll is placed in the clamping space 37 formed by the upper and lower clamping jaws 35 and 36 and is driven by the upper and lower conveying chains 31 and 32 to advance along a predetermined path, at the end of the path, a material feeding station 50 is provided, when the conveying unit 34 reaches the station, the upper and lower clamping jaws 35 and 36 are driven to rotate and open by the control system, the clamping space 37 disappears, the material accurately separates from the conveying unit 34 under the action of gravity and falls into a packaging prepared in advance by the film supply mechanism 20 below, thereby realizing a coordinated material feeding action without the need for an independent material pushing mechanism.

[0042] Specifically, at the starting end of the conveying mechanism, the upper and lower clamping jaws 35 and 36 are opened to receive the material such as a bandage roll placed by the feeding mechanism. Subsequently, the motor drives the clamping jaws to rotate and close, and the material is stably fixed in the clamping space 37 defined by them with a preset clamping force. Then, the upper conveying chain 31 and the lower conveying chain 32 are started to drive all the conveying units 34 to move smoothly along the predetermined path.

[0043] On the conveying path, a rejection station 60 can be provided. If a defective product is identified by the upstream vision detection system, the control system will instruct the motor of the upper and lower clamping jaws 35 and 36 to produce a small reverse rotation, so that the clamping force is instantaneously reduced. At the same time, the pneumatic nozzle located on one side of the end face of the material will spray high-pressure gas to blow the loose defective product off the conveying line to a recycling box. When the conveying unit 34 reaches the end of the path, the track starts to tilt downward, and when it reaches the lowest point, the control system triggers the clamping jaws to open. The trigger is completed by an electromagnet, and the clamping jaws are closed by default. When the material reaches the feeding point, the fixed electromagnet is powered on, and its magnetic force overcomes the spring force to drive the clamping jaws to rotate and open. The material then falls accurately into the package formed by the film supply mechanism 20 under the action of gravity.

[0044] Embodiment Two

[0045] On the basis of Embodiment One, the sealing mechanism 40 includes an adaptive heat sealing roller assembly 41, which includes a main shaft 42, and a plurality of floating compensation rings 43 are sleeved side by side on the shaft in the axial direction. Behind each floating compensation ring 43, a disc spring 44 is provided as an elastic member 44 to provide independent radial pre-tightening force. When working, if the film thickness is uneven, the corresponding floating compensation ring 43 can automatically move radially to compensate for the pressure and ensure the sealing quality. A fixed self-cleaning scraper 49 is also provided, and the scraping teeth of the scraper can be inserted into the gap between the floating compensation rings 43 for continuous cleaning.

[0046] In a preferred embodiment, the outer surface of each floating compensation ring 43 is also processed into a sealing protrusion 47, which is provided with a heat sealing surface 471 and a vacuum adsorption surface 472 with micro-holes in sequence in the rotation direction, so that the vacuum adsorption and stable guidance of the packaging film are realized at the same time as the heat sealing is completed.

[0047] After the package enters the core sealing area, it will be sealed in both transverse and longitudinal directions. The transverse sealing is completed by the adaptive heat sealing roller assembly 41 arranged symmetrically above and below. The roller rotates and pulls the entire package forward by friction. When the gap between the products reaches between the rollers, the rollers will crush the package and complete the heat sealing and cutting. In longitudinal sealing, when the main shaft 42 rotates, the follower 482 on it will rotate. Since the follower is constrained in the curved groove of the fixed functional groove plate 481, its rotation is converted into reciprocating linear motion by the mechanism, thereby driving the side sealing head to complete the crushing and returning action of the package side. Since the main shaft rotates one revolution to complete one transverse sealing, the actions of transverse and longitudinal sealing are perfectly mechanically synchronized.

[0048] Embodiment three

[0049] On the basis of embodiment one, a set of V-shaped narrowing guide rollers 45 and a transition support plate 46 are arranged between the outlet of the material conveying mechanism 30 and the inlet of the sealing mechanism 40, for final centering, narrowing and supporting of the package film and the material.

[0050] A rejection station 60 is arranged on the conveying path. When a defective product is detected, the clamping jaws of the conveying unit 34 will be slightly loosened under control to reduce the clamping force. Then a pneumatic nozzle blows air flow from the material end face to remove the defective product. If the material needs to be rotated and positioned, the action is performed before the conveying unit 34 stops or during the advancement. The extension mechanism on the active clamping jaw is activated to extend and press the friction roller against the side of the material. Then, by activating the micro motor, the friction roller is driven to rotate the material roll by friction. When the upper visual sensor detects that the material roll has been rotated to the target angle, the motor stops and the friction roller retracts. During the entire process, the other side of the material roll smoothly rolls on the passive clamping jaw without power, with very little resistance.

[0051] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes within the technical scope disclosed by the present application and according to the technical solutions and inventive concept of the present application, which should be covered within the protection scope of the present application.

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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