Electrostatic spinning device

Abstract

The utility model discloses an electrostatic spinning device which comprises a metal emitting plate. The metal receiving plate and the metal transmitting plate are oppositely arranged; the multiple spinning electrodes are arranged in an array mode in the linear direction and can move in an electric field formed by the metal emitting plate and the metal receiving plate to generate jet flow; the liquid supply container is used for supplying spinning liquid to the plurality of spinning electrodes; and the driving mechanism is used for installing the spinning electrode so as to drive the spinning electrode to circularly move between the liquid supply container and the electric field. According to the electrostatic spinning device, the metal emission plate is connected with the high-voltage generator to generate an electric field, the situation that the liquid supply container and the liquid supply pipeline are electrified after the spinning electrode enters the liquid supply container due to the fact that voltage is directly applied to the spinning electrode is avoided, and the safety of the device is improved; simultaneously; the electric field distribution between the metal receiving plate and the metal emitting plate is more uniform, so that the spinning uniformity can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrospinning, and particularly relates to an electrospinning device. BACKGROUND

[0002] Electrospinning is a method for preparing ultra-fine fibers from polymer solution or melt by using high-voltage electrostatics. The working principle of electrospinning is to establish a high-voltage electric field between an electrode and a collecting plate, so that the electrode is inductively charged or directly charged. The solution on the electrode is charged or polarized and subjected to strong stretching action of the electric field force. When the electric field force exceeds the viscous resistance and surface tension, the solution forms a jet to be sprayed onto the collecting plate, and the jet is cooled and solidified or the solvent is volatilized to form a fiber.

[0003] In the existing spinning device, there are needle type and needleless type. In the needleless type, a jet is generated by the way that multiple electrodes are connected to the power supply. However, in this way, the electrodes need to be immersed in the liquid supply container, so that the solution and the entire liquid supply pipeline are charged, which may cause the risk of electric leakage and safety problems. CONTENT OF THE UTILITY MODEL

[0004] To solve at least one problem existing in the prior art, according to one aspect of the present application, an electrospinning device is provided, comprising: a metal emitting plate; a metal receiving plate, which is arranged opposite to the metal emitting plate to generate an electric field between the metal emitting plate and the metal receiving plate; a plurality of spinning electrodes, which are arranged in an array along a straight line direction and can move in the electric field formed by the metal emitting plate and the metal receiving plate to generate a jet; a liquid supply container for providing spinning liquid to the plurality of spinning electrodes; and a driving mechanism for mounting the spinning electrodes to drive the spinning electrodes to move circularly between the liquid supply container and the electric field.

[0005] In some embodiments, the driving mechanism comprises a driving member, a transmission assembly, and a conveying belt provided on the transmission assembly, the transmission assembly is drivingly connected between the driving member and the conveying belt, and the conveying belt is used for mounting the plurality of spinning electrodes.

[0006] In some embodiments, the driving mechanism comprises at least two parallelly arranged conveying belts, and each of the spinning electrodes is connected between the two conveying belts.

[0007] In some embodiments, the transmission assembly comprises a set of driving synchronous wheels and two sets of first driven synchronous wheels, and one of the conveying belts is correspondingly arranged around one driving synchronous wheel and one first driven synchronous wheel.

[0008] The first driven synchronous wheel group is arranged between the metal receiving plate and the metal emitting plate, and the plane where the two first driven synchronous wheel groups are arranged is parallel to the metal receiving plate or the metal emitting plate.

[0009] The driving synchronous wheel group is arranged on the side of the metal emitting plate away from the metal receiving plate, is connected to the driving member, and the lower end surface of the driving synchronous wheel group is in contact with the spinning solution.

[0010] In some embodiments, the transmission assembly further comprises a second driven synchronous wheel group arranged between the metal emitting plate and the driving synchronous wheel group, for adjusting the moving direction of the conveying belt before entering the liquid supply container.

[0011] In some embodiments, the electrospinning device further comprises a cleaning mechanism arranged on the same side of the metal emitting plate as the liquid supply container, for cleaning the spinning electrode after passing through the electric field.

[0012] The transmission assembly further comprises a third driven synchronous wheel group and a fourth driven synchronous wheel group, the third driven synchronous wheel group is arranged in the cleaning mechanism, the fourth driven synchronous wheel group is arranged between the metal emitting plate and the third driven synchronous wheel group, and is arranged side by side with the second driven synchronous wheel group, for adjusting the moving direction of the conveying belt after passing through the cleaning mechanism.

[0013] In some embodiments, the cleaning mechanism comprises a collection container and a brush arranged in the collection container, the brush is used to abut against the spinning electrode.

[0014] In some embodiments, the collection container is provided with a first return liquid port.

[0015] In some embodiments, the electrospinning device further comprises a spinning collection mechanism, the spinning collection mechanism comprises a unwinding roller, a collection belt and a collection roller, the unwinding roller and the collection roller are arranged on both sides of the metal receiving plate along the moving direction of the collection belt, for driving the collection belt to move.

[0016] In some embodiments, the liquid supply container is provided with a liquid supply port and a second return liquid port, the second return liquid port is arranged above the liquid supply port.

[0017] In summary, the electrospinning device provided by the present application has the following technical effects:

[0018] When an electric field is generated between the metal emitting plate and the metal receiving plate, under the driving of the driving mechanism, the plurality of spinning electrodes enter the electric field after absorbing the spinning solution in the liquid supply container to generate the jet, and finally form the spinning on the metal receiving plate. Since the electric field between the metal emitting plate and the metal receiving plate is generated in this way, the voltage is not directly applied to the spinning electrode, so that the spinning electrode enters the liquid supply container, and the electric charging of the liquid supply container and the liquid supply pipeline is avoided. The spinning electrode of the embodiment only generates weak static electricity, and the weak static electricity on the liquid supply container can be eliminated by grounding. Therefore, the safety hidden danger caused by high-voltage static electricity is eliminated, and it is beneficial to add the spinning solution and pipeline maintenance during production without closing the high voltage, avoiding affecting the normal production of the equipment. Further, the electric field between the metal receiving plate and the metal emitting plate is more uniform, which is beneficial to improve the uniformity of the spinning. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the electrospinning device of the embodiment of the application.

[0020] Figure 2 It is a front view of the electrospinning device in Figure 1

[0021] Figure 3 It is a structure schematic view of the conveying belt and the spinning electrode in Figure 1

[0022] The drawing: 100-electrospinning device, 10-metal emitting plate, 20-metal receiving plate, 30-spinning electrode, 40-liquid supply container, 41-liquid supply port, 42-second return port, 50-driving mechanism, 51-driving part, 52-transmission assembly, 521-main drive synchronous wheel set, 522-first driven synchronous wheel set, 523-second driven synchronous wheel set, 524-third driven synchronous wheel set, 525-fourth driven synchronous wheel set, 53-conveying belt, 54-mounting seat, 60-spinning collection mechanism, 61-unwinding roller, 62-collection belt, 63-collection roller, 64-passing rod, 70-cleaning mechanism, 71-collection container, 711-first return port, 72-brush, 80-high-voltage generator. DETAILED DESCRIPTION

[0023] In order to better understand and implement, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application.

[0024] ​​In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0026] The present application will be described in further detail below in conjunction with the accompanying drawings.

[0027] Please refer to Figures 1 to 3 The electrospinning device 100 provided by the embodiments of the present application includes a metal emitting plate 10, a metal receiving plate 20, a spinning electrode 30, a liquid supply container 40, and a driving mechanism 50.

[0028] The metal emitting plate 10 is used to connect a high-voltage generator 80; the metal receiving plate 20 and the metal emitting plate 10 are oppositely arranged, and are used to connect a negative electrode or ground to generate an electric field between the metal emitting plate 10 and the metal receiving plate 20; the spinning electrode 30 includes a plurality of spinning electrodes 30, the plurality of spinning electrodes 30 are arranged in an array along a straight line direction, and can move in the electric field formed by the metal emitting plate 10 and the metal receiving plate 20 to generate a jet flow; the liquid supply container 40 is used to provide spinning liquid to the plurality of spinning electrodes 30; and the driving mechanism 50 is used to install the spinning electrode 30 to drive the spinning electrode 30 to move circularly between the liquid supply container 40 and the electric field.

[0029] The electrostatic spinning device 100 described above, when an electric field is generated between the metal emitting plate 10 and the metal receiving plate 20, under the driving of the driving mechanism 50, the plurality of spinning electrodes 30 enter the electric field after picking up the spinning liquid in the liquid supply container 40 to generate the jet, and finally form the spinning on the metal receiving plate 20. Since the electric field is generated between the metal emitting plate 10 and the metal receiving plate 20, the voltage is not directly applied to the spinning electrode 30, so that the spinning electrode 30 enters the liquid supply container 40, and the liquid supply container 40 and the liquid supply pipeline are charged. The weak static electricity on the spinning electrode 30 of the embodiment only generates weak static electricity, and the weak static electricity on the liquid supply container 40 can be eliminated by grounding. Therefore, the safety hidden danger caused by high-voltage static electricity is eliminated, which is beneficial to the addition of spinning solution and pipeline maintenance in the production process, and high voltage is not required to be closed, so as to avoid affecting the normal production of the equipment. Further, the electric field between the metal receiving plate 20 and the metal emitting plate 10 is more uniform, which is beneficial to improving the uniformity of the spinning.

[0030] Please refer to Figure 1 In an embodiment of the present application, in order to facilitate the collection of the spinning, the electrostatic spinning device 100 further comprises a spinning collection mechanism 60, the spinning collection mechanism 60 comprises a unwinding roller 61, a collection belt 62 and a collection roller 63, the unwinding roller 61 and the collection roller 63 are arranged on both sides of the metal receiving plate 20 along the movement direction of the collection belt 62, and are used to drive the movement of the collection belt 62 to realize the collection of the spinning. In this way, through the setting of the spinning collection mechanism 60, the spinning can be collected through the continuous driving movement of the collection belt 62 between the unwinding roller 61 and the collection roller 63, so as to ensure the continuity of the spinning production, thereby ensuring the production efficiency.

[0031] Further, the spinning collection mechanism 60 of the embodiment further comprises two passing rods 64, the two passing rods 64 are arranged on both sides of the metal receiving plate 20 along the movement direction of the collection belt 62, and are located between the collection roller 63 and the unwinding roller 61, and are used to tension the collection belt 62, so as to ensure the stable movement of the collection belt 62.

[0032] Please refer to Figure 1 and Figure 2 In an embodiment of the present application, the driving mechanism 50 comprises a driving member 51, a transmission assembly 52 and a transmission belt 53 arranged on the transmission assembly 52, the transmission belt 53 is used to install a plurality of spinning electrodes 30, so that under the driving of the driving member 51, the transmission assembly 52 transmits power to the transmission belt 53. Since the movement of the transmission belt 53 drives the continuous movement of the spinning electrode 30, the spinning electrode 30 can move circularly in the liquid supply container 40 and the electric field, so that continuous spinning can be realized.

[0033] Further, in order to avoid the transmission belt 53 from absorbing too much spinning solution and affecting the uniformity of the spinning, the driving mechanism 50 comprises at least two parallel transmission belts 53, and each spinning electrode 30 is connected between the two transmission belts 53. In this way, the transmission belt 53 has a smaller width and a smaller contact area with the spinning solution, so that the jetting phenomenon is avoided when the transmission belt 53 moves into the electric field, and the uniformity of the spinning is affected. At the same time, by arranging two transmission belts 53, each spinning electrode 30 can be connected between the two transmission belts 53, for example, arranged perpendicular to the movement direction of the transmission belt 53, or arranged at an acute angle with the movement direction of the transmission belt 53, so that the plurality of spinning electrodes 30 can continuously pass through the electric field under the driving of the driving member 51, thereby ensuring the continuity of the spinning. In other embodiments, a transmission belt 53 with a larger width can also be arranged according to the needs, and the spinning electrode 30 can be installed on the surface of the transmission belt 53 along the movement direction of the transmission belt 53 or perpendicular to the movement direction of the transmission belt 53, and the spinning effect can also be achieved.

[0034] In the embodiment, the driving member 51 is a driving motor, the transmission assembly 52 is a synchronous wheel transmission mode, and the transmission belt 53 is a toothed belt, so that the teeth on the toothed belt and the synchronous wheels in the transmission assembly 52 are engaged and matched. When the spinning electrode 30 is installed on the transmission belt 53, the mounting seat 54 can be arranged on the transmission belt 53, and the spinning electrode 30 is installed on the mounting seat 54, as shown in FIG. 4, so that the spinning electrode 30 is installed between the two transmission belts 53. Figure 3

[0035] Further, the height of the mounting seat 54 is greater than the thickness of the toothed belt, and the liquid level in the liquid supply container 40 is controlled, so that the toothed belt does not absorb the spinning solution and affect the uniformity of the spinning.

[0036] ​The transmission assembly 52 comprises at least one set of driving sprocket 521 and two sets of first driven sprocket 522. One conveyor belt 53 is arranged around one driving sprocket and one first driven sprocket. The two sets of first driven sprocket 522 are arranged between the metal receiving plate 20 and the metal emitting plate 10. The plane of the two sets of first driven sprocket 522 is parallel to the metal receiving plate 20 or the metal emitting plate 10. The driving sprocket 521 is located on the side of the metal emitting plate 10 away from the metal receiving plate 20. The driving sprocket 521 is connected to the driving member 51 and arranged in the liquid supply container 40. The lower end surface of the driving sprocket 521 is in contact with the spinning liquid. The driving sprocket 521 drives the spinning electrode 30 to contact the spinning liquid. Under the driving of the driving member 51, power is output from the driving sprocket 521 to drive the conveyor belt 53 to rotate. Since the two sets of first driven sprocket 522 are arranged between the metal receiving plate 20 and the metal emitting plate 10, the spinning electrode 30 on the conveyor belt 53 can enter the electric field between the metal emitting plate 10 and the metal receiving plate 20.

[0037] The driving sprocket 521 and the first driven sprocket 522 each comprise a plurality of sprockets connected by a connecting shaft. For example, when there are two conveyor belts 53, the driving sprocket 521 comprises two driving sprockets, and the first driven sprocket 522 comprises two first driven sprockets. Correspondingly, one conveyor belt 53 is arranged around one driving sprocket and one first driven sprocket.

[0038] Further referring to Figure 2 , the transmission assembly 52 further comprises a second driven sprocket 523. The second driven sprocket 523 is arranged between the metal emitting plate 10 and the driving sprocket 521 to adjust the movement direction of the conveyor belt 53 before entering the liquid supply container 40. Through the arrangement of the second driven sprocket 523, when the conveyor belt 53 is transmitted by the first driven sprocket 522, the movement direction is adjusted by the second driven sprocket 523. Specifically, the second driven sprocket 523 in the embodiment is used to realize parallel transmission of the conveyor belt 53 before and after the spinning electrode 30 contacts the spinning liquid, thereby reducing the opening area of the liquid supply container 40 to reduce the volume occupied by the liquid supply container 40. Further, by reducing the opening size of the liquid supply container 40, the volatilization of the spinning liquid in the liquid supply container 40 is also reduced, thereby ensuring the stability of the properties of the spinning liquid.

[0039] Referring to Figure 1 and Figure 2In one embodiment of the present application, the electrostatic spinning device 100 further comprises a cleaning mechanism 70, which is arranged on the same side of the metal emitting plate 10 as the liquid supply container 40, and is used to clean the spinning electrode 30 after it passes through the electric field; in this way, after the spinning electrode 30 is coated with the spinning liquid and spins in the electric field, it is cleaned by the cleaning mechanism 70 under the drive of the conveying belt 53, the cleaning mechanism 70 scrapes off the excess spinning liquid on the spinning electrode 30 and collects it, so as to realize the recycling of the spinning liquid and avoid pollution to the environment.

[0040] The transmission assembly 52 further comprises a third set of driven synchronous wheels 524 and a fourth set of driven synchronous wheels 525, the third set of driven synchronous wheels 524 is arranged in the cleaning mechanism 70, and the fourth set of driven synchronous wheels 525 is arranged between the metal emitting plate 10 and the third set of driven synchronous wheels 524 and is arranged side by side with the second set of driven synchronous wheels 523; in this way, the third set of driven synchronous wheels 524 can guide the conveying belt 53 into the cleaning mechanism 70, the fourth set of driven synchronous wheels 525 can change the conveying direction of the conveying belt 53 after it passes through the cleaning mechanism 70, and cooperate with the second set of driven synchronous wheels 523 to realize the movement of the conveying belt 523 in a way that is parallel to the metal emitting plate 10 or the metal receiving plate 20, so as to reduce the opening size of the cleaning mechanism 70 and the occupied volume of the cleaning mechanism 70.

[0041] Specifically, the fourth set of driven synchronous wheels 525 of the present embodiment is arranged parallel to the second set of driven synchronous wheels 523 and is used to adjust the entering and exiting of the conveying belt 53 in a parallel way before it enters the cleaning mechanism 70 and after it exits the cleaning mechanism 70.

[0042] It can be understood that the number of synchronous wheels in the third set of driven synchronous wheels 524 and the fourth set of driven synchronous wheels 525 is the same as that in the first set of driven synchronous wheels 522 and the second set of driven synchronous wheels 523.

[0043] Please refer to Figure 1 and Figure 2 The cleaning mechanism 70 of the present embodiment comprises a collection container 71 and a brush 72 arranged in the collection container 71, the brush 72 is used to abut against the spinning electrode 30 to clean the surface of the spinning electrode 30, and the collection container 71 is used to collect the scraped-off spinning liquid, so as to realize the collection of the spinning liquid.

[0044] Further, in order to facilitate the recycling of the collected spinning liquid, the collection container 71 is provided with a first liquid return port 711, so that the spinning liquid can be outputted through the first liquid return port 711 for recycling.

[0045] When the spinning electrode 30 is driven to pick up the spinning solution by the active synchronizing wheel group 521, the spinning electrode 30 on the mounting base 54 is immersed in the spinning solution.

[0046] Please see Figure 2 In one embodiment of this application, in order to continuously supply spinning solution to the supply container 40, the supply container 40 is provided with a supply port 41, so that the spinning solution can be continuously supplied to the supply container 40 through the provision of the supply port 41.

[0047] Furthermore, in order to ensure that the amount of spinning solution in the supply container 40 is within a preset range, the supply container 40 is provided with a second return port 42, which is located above the supply port 41. That is, when the amount of spinning solution in the supply container 40 reaches a certain height, for example, only after the spinning electrode 30 is completely submerged and the mounting base 54 is partially submerged, the spinning solution is recycled to ensure that the spinning electrode 30 can just come into contact with the spinning solution after the conveyor belt 53 drives the spinning belt 53 into the supply container 40.

[0048] Understandably, the electrospinning apparatus 100 of this embodiment also includes a high-voltage generator 80, which is connected to the metal emitting plate 10 and the metal receiving plate 20 is grounded, thereby generating a high-voltage electric field between the metal emitting plate 10 and the metal receiving plate 20.

[0049] The movement direction of the spinning electrode 30 is as follows: Figure 1 As shown by the middle arrow, the conveyor belt 53 moves counterclockwise. After exiting the liquid supply container 40, it passes through two sets of first driven synchronous pulley groups 522, then through the third driven synchronous pulley group 524, and is cleaned by the cleaning mechanism 70. Finally, it returns to the liquid supply container 40 through the fourth driven synchronous pulley and the second driven synchronous pulley group 523. In this way, the spinning electrode 30 on the conveyor belt 53 is circulated and spun.

[0050] The technical means disclosed in this application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An electrospinning apparatus (100), characterized in that, include: Metal emission plate (10); A metal receiving plate (20) is disposed opposite to the metal emitting plate (10) to generate an electric field between the metal receiving plate (20); The spinning electrodes (30) include a plurality of electrodes arranged in an array along a straight line and capable of moving within the electric field formed by the metal emitting plate (10) and the metal receiving plate (20) to generate a jet. A liquid supply container (40) is used to supply spinning solution to the plurality of said spinning electrodes (30); A drive mechanism (50) is used to mount the spinning electrode (30) to drive the spinning electrode (30) to circulate between the liquid supply container (40) and the electric field.

2. The electrospinning apparatus (100) according to claim 1, characterized in that, The drive mechanism (50) includes a drive member (51), a transmission assembly (52), and a conveyor belt (53) disposed on the transmission assembly (52). The transmission assembly (52) is drively connected between the drive member (51) and the conveyor belt (53). The conveyor belt (53) is used to mount a plurality of the spinning electrodes (30).

3. The electrospinning apparatus (100) according to claim 2, characterized in that, The drive mechanism (50) includes at least two conveyor belts (53) arranged in parallel, and each of the spinning electrodes (30) is connected between the two conveyor belts (53).

4. The electrospinning apparatus (100) according to claim 2, characterized in that, The transmission assembly (52) includes at least one set of active synchronous pulleys (521) and two sets of first driven synchronous pulleys (522), and a conveyor belt (53) is wound around one active synchronous pulley and one first driven synchronous pulley in a one-to-one correspondence; Two sets of first driven synchronous pulley sets (522) are disposed between the metal receiving plate (20) and the metal transmitting plate (10), and the plane in which the two sets of first driven synchronous pulley sets (522) are located is parallel to the metal receiving plate (20) or the metal transmitting plate (10); The active synchronizing wheel assembly (521) is located on the side of the metal transmitting plate (10) away from the metal receiving plate (20), connected to the driving member (51), and the lower end face of the active synchronizing wheel assembly (521) is in contact with the spinning liquid phase.

5. The electrospinning apparatus (100) according to claim 4, characterized in that, The transmission assembly (52) further includes a second driven synchronous pulley set (523), which is located between the metal launch plate (10) and the active synchronous pulley set (521) and is used to adjust the direction of movement of the conveyor belt (53) before it enters the liquid supply container (40).

6. The electrospinning apparatus (100) according to claim 5, characterized in that, The electrospinning device (100) also includes a cleaning mechanism (70), which and the liquid supply container (40) are located on the same side of the metal emission plate (10) and are used to clean the spinning electrode (30) after passing through the electric field. The transmission assembly (52) further includes a third driven synchronous pulley set (524) and a fourth driven synchronous pulley set (525). The third driven synchronous pulley set (524) is located inside the cleaning mechanism (70), and the fourth driven synchronous pulley set (525) is located between the metal launch plate (10) and the third driven synchronous pulley set (524), and is arranged in parallel with the second driven synchronous pulley set (523) to adjust the movement direction of the conveyor belt (53) after passing through the cleaning mechanism (70).

7. The electrospinning apparatus (100) according to claim 6, characterized in that, The cleaning mechanism (70) includes a collection container (71) and a brush (72) disposed in the collection container (71), the brush (72) being used to abut against the spinning electrode (30).

8. The electrospinning apparatus (100) according to claim 7, characterized in that, The collection container (71) is provided with a first return port (711).

9. The electrospinning apparatus (100) according to any one of claims 1-8, characterized in that, The electrospinning device (100) further includes a spinning collection mechanism (60), which includes an unwinding roller (61), a collecting belt (62), and a collecting roller (63). The unwinding roller (61) and the collecting roller (63) are located on both sides of the metal receiving plate (20) along the movement direction of the collecting belt (62) to drive the collecting belt (62) to move.

10. The electrospinning apparatus (100) according to any one of claims 1-8, characterized in that, The liquid supply container (40) is provided with a liquid supply port (41) and a second liquid return port (42), and the second liquid return port (42) is located above the liquid supply port (41).

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