A meltblown fabric receiving device

Abstract

This invention provides a meltblown fabric receiving device, belonging to the field of mask processing technology. It includes a frame, a receiving cylinder rotatably connected to the frame, an air duct located inside the receiving cylinder, and a fabric exit guide roller rotatably connected to the frame. The air duct has two air holes parallel to the receiving cylinder, and two impellers are rotatably connected to the air holes, respectively. Both impellers are rotatably connected to the frame. The air duct has an inlet hopper and an outlet hopper connected to the first air hole, and two inlet and outlet hoppers connected to the second air hole. The receiving area is located directly below the solution nozzle. The first inlet hopper is aligned with the inner wall of the receiving cylinder corresponding to the receiving area, the second inlet hopper is aligned with the inner wall of the receiving cylinder corresponding to the adsorption area, and the second outlet hopper is aligned with the inner wall of the receiving cylinder corresponding to the peeling area. The first inlet hopper is aligned with the inner wall of the receiving cylinder outside the meltblown fabric coverage area. The peeling area is the gradually opening area where the meltblown fabric is transferred from the receiving cylinder to the fabric exit guide roller. This invention has advantages such as low maintenance costs.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mask processing, and relates to a melt-blown cloth receiving device. BACKGROUND

[0002] The melt-blown cloth, as the main filter layer in a mask, is processed according to the following principle: after the polypropylene melt-blown material is hot-melted and flocculated and sprayed, it is cooled on a receiving net and then peeled off and pulled out. In the prior art, two sets of air conditioning systems are needed, one set is used for preliminarily cooling and guiding the liquid flocculation sprayed by the spray head, and the other set is used for vacuumizing the inside of the receiving cylinder (forming a negative pressure difference with the outside), the receiving cylinder is a net cylinder, and the negative pressure in the inside is used for attaching the melt-blown cloth to the outer wall surface of the net cylinder before forming, and further cooling the melt-blown cloth.

[0003] In the above prior art, the net-shaped receiving cylinder needs to be regularly maintained, because the negative pressure in the inside of the receiving cylinder causes the aggregation of polypropylene flocculation, such as in the net holes and air ducts of the receiving cylinder, which starts to affect the adsorption effect of the melt-blown cloth on the receiving net and the flatness of the surface of the receiving cylinder after a period of operation, and also interferes with the stability of the negative pressure value. In addition, due to the influence of the negative pressure in the inside of the receiving cylinder, the separation of the melt-blown cloth from the receiving net after cooling and forming is not smooth, and generally the melt-blown cloth pulling tension needs to be increased. Under the condition of constant pulling tension, the adsorption force of the melt-blown cloth on the surface of the receiving cylinder also fluctuates to some extent, which will cause large fluctuations in the melt-blown cloth pulling tension and pulling speed, and further affect the uniformity of the thickness of the melt-blown cloth (the rotating speed of the receiving cylinder is directly related to the thickness of the melt-blown cloth, and the uneven stretching of the melt-blown cloth or the sliding of the melt-blown cloth on the receiving cylinder caused by the fluctuation of the pulling tension will also affect the thickness of the melt-blown cloth). The peeling of the melt-blown cloth from the receiving cylinder will also cause fluctuations in the pulling tension. Therefore, in terms of the current processing method, there is optimization space in the aspects of quality stability, difficulty of parameter control and maintenance cost. SUMMARY

[0004] The application aims to solve the above problems existing in the prior art, and provides a melt-blown cloth receiving device.

[0005] The object of the present application can be achieved by the following technical solutions: a melt-blown cloth receiving device, characterized in that it comprises a rack, a receiving cylinder rotatably connected to the rack, an air pipe in the receiving cylinder, and a cloth outlet guide roller rotatably connected to the rack, wherein the air pipe has air holes one and two parallel to the receiving cylinder, the air holes one and two are respectively rotatably connected with air wheels one and two, the air wheels one and two are rotatably connected to the rack, the air pipe has an air inlet one and an air outlet one connected with the air hole one, and the air pipe has an air inlet two and an air outlet two connected with the air hole two; along the rotation direction of the receiving cylinder, the melt-blown cloth coverage area on the receiving cylinder is sequentially divided into a receiving area, an adsorption area, a wrapping area, and a stripping area, the receiving area is located directly below the solution nozzle, the air inlet one is aligned with the corresponding inner wall of the receiving cylinder in the receiving area, the air inlet two is aligned with the corresponding inner wall of the receiving cylinder in the adsorption area, the air outlet two is aligned with the corresponding inner wall of the receiving cylinder in the stripping area, and the air inlet one is aligned with the inner wall of the receiving cylinder outside the melt-blown cloth coverage area on the receiving cylinder; the stripping area is a gradual opening area for the melt-blown cloth to transfer from the receiving cylinder to the cloth outlet guide roller.

[0006] Further, the air wheels one and two are respectively controlled by a motor.

[0007] Further, the outlet of the air outlet one is smaller than the inlet of the air inlet one.

[0008] Further, the stripping area is located below the horizontal plane where the receiving cylinder axis is located.

[0009] Further, the rack is provided with an air outlet guide pipe opposite to the air outlet one outside the receiving cylinder.

[0010] By arranging the air wheels one and two in the receiving cylinder, when the air wheel one rotates, it generates a low-temperature airflow in the receiving area to further cool the fiber flow sprayed by the nozzle. During the slow and uniform rotation of the receiving cylinder, the melt-blown cloth preliminarily formed after being cooled reaches the adsorption area, which is the air inlet position of the air wheel two. The melt-blown cloth preliminarily formed after being cooled forms an adsorption force on the receiving cylinder. Then, the melt-blown cloth enters the wrapping area, where there is no airflow to interfere with it. The existence of the wrapping area increases the frictional resistance of the melt-blown cloth on the receiving cylinder, so that the melt-blown cloth is stretched on the melt-blown cloth in the adsorption area under the action of the traction force. Because the melt-blown cloth at this position has not been completely cooled and shaped, stretching will affect the uniformity of the thickness of the melt-blown cloth formed. After the melt-blown cloth passes through the wrapping area, it starts to leave the receiving cylinder and transfers to the cloth outlet guide roller to enter the subsequent traction and cutting system. At this time, the melt-blown cloth has been completely cooled and formed. In order to facilitate the smooth separation of the melt-blown cloth from the receiving cylinder and prevent the melt-blown cloth from being torn, the air outlet two corresponding to the air outlet of the air wheel two is aligned with the stripping area, which generates a certain airflow pressure on the receiving cylinder from inside to outside, reduces the resistance of the melt-blown cloth when it separates from the receiving roller, improves the stability of the melt-blown cloth stripping, and avoids the adverse effects of stripping resistance fluctuations on cloth traction and cloth flatness.

[0011] In addition, since the air outlet position of the first impeller corresponds to the air outlet hopper two which is aimed at a place outside the meltblown cloth coverage area on the receiving cylinder, and its outlet diameter is relatively small, it can generate a relatively large airflow. It is a reverse flushing of the non-covered area of ​​the receiving roller, ensuring the cleanliness of the receiving roller mesh. The debris and airflow generated by the backwashing are led out by the air outlet duct, that is, the receiving roller can achieve maintenance-free or long-cycle maintenance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the meltblown fabric receiving device.

[0013] Figure 2 This is a cross-sectional view of the receiving tube.

[0014] Figure 3 This is a schematic diagram of the existing meltblown fabric receiving method.

[0015] In the diagram, 1. Frame; 2. Receiving tube; 3. Air duct; 31. Air hole one; 32. Air hole two; 33. Wind wheel one; 34. Wind wheel two; 35. Air inlet hopper one; 36. Air outlet hopper one; 37. Air inlet hopper two; 38. Air outlet hopper two; 4. Fabric guide roller; 5. Air outlet duct; a. Receiving area; b. Adsorption area; c. Wrapping area; d. Peeling area. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figure 1 and Figure 2 The meltblown fabric receiving device shown includes a frame 1, a receiving cylinder 2 rotatably connected to the frame 1, an air duct 3 located inside the receiving cylinder 2, and a fabric guide roller 4 rotatably connected to the frame 1. The air duct 3 has an air hole 31 and an air hole 32 parallel to the receiving cylinder 2. A first impeller 33 and a second impeller 34 are rotatably connected to the air hole 31 and the air hole 32, respectively. Both the first impeller 33 and the second impeller 34 are rotatably connected to the frame 1. The air duct 3 has an air inlet hopper 35 and an air outlet hopper 36 connected to the first air hole 31, and an air inlet hopper 37 connected to the second air hole 32. 38; Following the rotation direction of the receiving cylinder 2, the meltblown fabric coverage area on the receiving cylinder 2 is sequentially divided into receiving area a, adsorption area b, wrapping area c, and peeling area d. Receiving area a is located directly below the solution nozzle. Air inlet 35 is aligned with the inner wall of the receiving cylinder 2 corresponding to receiving area a, air inlet 37 is aligned with the inner wall of the receiving cylinder 2 corresponding to adsorption area b, and air outlet 38 is aligned with the inner wall of the receiving cylinder 2 corresponding to peeling area d. Air inlet 35 is aligned with the inner wall of the receiving cylinder 2 outside the meltblown fabric coverage area. Peeling area d is the gradually opening area where the meltblown fabric is transferred from the receiving cylinder 2 to the output guide roller 4.

[0018] The wind wheel I 33 and the wind wheel II 34 are controlled by a motor respectively, so that the rotating speed of the wind wheel I 33 and the wind wheel II 34 can be controlled individually.

[0019] The outlet of the air outlet I 36 is smaller than the inlet of the air inlet I 35, so that a stronger air flow is formed at the air outlet I 36 to reverse wash and dredge the receiving cylinder 2.

[0020] The peeling area d is located below the horizontal plane where the axis of the receiving cylinder 2 is located. In comparison, the separation position of the melt-blown cloth in the prior art is more forward, so that the melt-blown cloth is affected by the traction tension in the area where the melt-blown cloth is not completely formed. Figure 3

[0021] The air outlet guide pipe 5 opposite to the air outlet I 36 is arranged on the frame 1 and outside the receiving cylinder 2, so that the impurities in the reverse washing are discharged outside.

[0022] The wind wheel I 33 and the wind wheel II 34 are arranged in the receiving cylinder 2, so that when the wind wheel I 33 rotates, a low-temperature air flow is generated in the receiving area a to further cool the fiber flow sprayed by the nozzle. In the process of slowly and uniformly rotating the receiving cylinder 2, the melt-blown cloth preliminarily formed after being cooled reaches the adsorption area b, which is the air inlet position of the wind wheel II 34. The melt-blown cloth preliminarily formed is subjected to the adsorption force on the receiving cylinder 2. Subsequently, the melt-blown cloth enters the wrapping area c, which is not disturbed by the air flow. The wrapping area c is arranged to increase the frictional resistance of the melt-blown cloth on the receiving cylinder 2, so that the melt-blown cloth is subjected to the traction force on the melt-blown cloth at the adsorption area b. Because the melt-blown cloth at the adsorption area b is not completely cooled and shaped, the stretching will affect the uniformity of the thickness of the melt-blown cloth. After the melt-blown cloth passes through the wrapping area c, the melt-blown cloth starts to leave the receiving cylinder 2 and is transferred to the cloth outlet guide roller 4 to enter the subsequent traction and cutting system. At this time, the melt-blown cloth has been completely cooled and shaped. In order to facilitate the smooth separation of the melt-blown cloth from the receiving cylinder 2 and avoid tearing and damaging the melt-blown cloth, the air outlet II 38 corresponding to the air outlet of the wind wheel II 34 is aligned with the peeling area d, so that a certain air flow pressure is generated on the receiving cylinder 2 from inside to outside, the resistance of the melt-blown cloth leaving the receiving roller is reduced, the stability of the melt-blown cloth peeling is improved, and the adverse effects of the peeling resistance fluctuation on the cloth traction and the flatness of the cloth are avoided.

[0023] ​In addition, since the air outlet of the wind wheel 33 corresponds to the air outlet 38 which is aligned with a certain position outside the melt-blown cloth coverage area on the receiving cylinder 2, and its outlet diameter is relatively small, a relatively large air flow can be generated, which is a reverse flushing to the non-coverage area of the receiving roller, ensuring the cleanliness of the receiving roller mesh, and the debris generated by the reverse flushing and the reverse flushing air flow are led out by the air outlet duct 5, that is, the receiving roller can realize maintenance-free or long-period maintenance. Furthermore, the resistance of the melt-blown cloth separating from the receiving cylinder 2 is derived from the partial melt-blown cloth filaments embedded in the mesh of the receiving cylinder 2 due to the adsorption force in the receiving process. In this scheme, in the stripping area d, the melt-blown cloth is stripped by the reverse air flow of the hot air stream cooled melt-blown cloth. Not only can the melt-blown cloth filaments embedded in the mesh be combed, but also a certain amount of heat can be provided to make the filaments more easily separate from the mesh of the receiving cylinder 2.

[0024] As shown in Figure 1 , the spray head sprays the slurry onto the receiving cylinder 2, and the spray head has a blast pipe 3 on each side for guiding and cooling the slurry flow, while in the prior art as shown in Figure 3 , the inside of the receiving cylinder 2 is directly vacuumed, and the receiving cylinder 2 only has air flow from the outside to the inside, and there is no air flow from the outside to the inside, which makes the mesh prone to blockage. In addition, the coverage area of the melt-blown cloth on the receiving cylinder 2 in the prior art is affected by negative pressure, and the stripping resistance is large.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A meltblown fabric receiving device characterized by, The application relates to a melt-blown fabric stripping device, which comprises a rack (1), a receiving cylinder (2) rotatably connected to the rack (1), a wind pipe (3) located in the receiving cylinder (2) and a fabric guiding roller (4) rotatably connected to the rack (1), the wind pipe (3) is provided with wind hole one (31) and wind hole two (32) parallel to the receiving cylinder (2), the wind hole one (31) and the wind hole two (32) are respectively rotatably connected with wind wheel one (33) and wind wheel two (34), the wind wheel one (33) and the wind wheel two (34) are rotatably connected to the rack (1), the wind pipe (3) is provided with air inlet one (35) and air outlet one (36) communicating with the wind hole one (31), the wind pipe (3) is provided with air inlet two (37) and air outlet two (38) communicating with the wind hole two (32), along the rotating direction of the receiving cylinder (2), the melt-blown fabric covering area on the receiving cylinder (2) is sequentially divided into a receiving area (a), an adsorption area (b), a wrapping area (c) and a stripping area (d), the receiving area (a) is located directly below the solution nozzle, the air inlet one (35) is aligned with the inner wall of the receiving cylinder (2) corresponding to the receiving area (a), the air inlet two (37) is aligned with the inner wall of the receiving cylinder (2) corresponding to the adsorption area (b), the air outlet two (38) is aligned with the inner wall of the receiving cylinder (2) corresponding to the stripping area (d), the air inlet one (35) is aligned with the inner wall of the receiving cylinder (2) outside the melt-blown fabric covering area, the stripping area (d) is a gradually opening area for transferring the melt-blown fabric from the receiving cylinder (2) to the fabric guiding roller (4); The wind wheel one (33) and the wind wheel two (34) are respectively controlled by a motor; The outlet of the air outlet one (36) is smaller than the inlet of the air inlet one (35).

2. The melt-blown fabric receiving device of claim 1, wherein, The stripping area (d) is located below the horizontal plane where the axis of the receiving cylinder (2) is located.

3. The melt-blown fabric receiving device of claim 1, wherein, The rack (1) is provided with an air outlet guide pipe (5) opposite to the air outlet one (36) and located outside the receiving cylinder (2).

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