An electrospinning nanofiber mask preparation device

Abstract

The present invention discloses an electrostatic spinning nanofiber mask preparation device, comprising a workbench, a discharge roller and a take-up roller being provided on the upper side of the workbench, a shearing device being provided between the discharge roller and the take-up roller, the shearing device comprising a vertical plate, the upper side of the vertical plate being fixedly connected to a horizontal plate, the horizontal plate being provided with a downward pressure cylinder, the lower end of the telescopic rod of the downward pressure cylinder being fixedly connected to a flat plate, the bottom of the flat plate being horizontally slidably connected to a slider, the bottom of the slider being provided with a cutting die, the vertical plate being rotatably connected to a reference shaft, the reference shaft being provided with at least two support rods; the upper end of each support rod being rotatably connected to a support rod, the rotation shaft of the support rod being provided with a torsion spring, the end of the support rod being fixedly connected to a bearing die, the bottom of the bearing die being provided with an air cylinder. The present invention uses negative pressure adsorption and a pulling rod to perform a pushing and blowing action, thereby facilitating detachment without requiring an air source or complex air path arrangement, thereby improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of mask production technology, and in particular to an electrospun nanofiber mask preparation device. Background Technology

[0002] Traditional masks generally use electret-treated meltblown polypropylene as the filter material. This filter membrane uses the principle of electrostatic adsorption to adsorb particulate matter. The interception efficiency of this filter membrane will drop rapidly as the electrostatic attraction fades. In addition, the pore size of polypropylene meltblown cloth is large, which often requires increasing the amount used and the thickness of the filter membrane to achieve the interception effect. This results in reduced breathability and reduced wearing comfort.

[0003] In the prior art, such as the electrospinning nanofiber mask preparation instrument with patent application number CN202120111382.0, there is a base plate, a support frame, a first cylinder, a cutting mold, a rotating assembly, and a combined stretching structure. The rotating assembly is installed in the middle of the top side of the base plate, and the combined stretching structure is respectively set at both ends of the top side of the base plate. By operating the first cylinder, the cutting mold is pressed down. During the pressing down of the cutting mold, cutting is performed by a cutting blade. With the cooperation of a hot melt blade, synchronous sealing can be achieved, realizing one-time molding.

[0004] In the aforementioned existing mask cutting device, the mask is easily pulled up when the cutting mold is lifted. When the mask needs to be discharged, it is only blown out by the cylinder, which requires a precise controller to control the action. The failure rate is relatively high. At the same time, the cylinder adsorption or blowing is prone to local deformation of the mask if the mask edges stick due to the single airflow contact point and a large detachment force is required. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an electrospinning nanofiber mask preparation device, thereby solving the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electrospun nanofiber mask manufacturing device includes a worktable with a feeding roller and a receiving roller on the upper side of the worktable. A shearing device is provided between the feeding roller and the receiving roller. The shearing device includes a vertical plate, a horizontal plate is fixedly connected to the upper side of the vertical plate, and a pressing cylinder is provided on the horizontal plate. The lower end of the telescopic rod of the pressing cylinder is fixedly connected to a flat plate, and a slider is horizontally slidably connected to the bottom of the flat plate. A cutting mold is installed at the bottom of the slider, and a buffer spring is installed between the slider and the cutting mold. The vertical plate is rotatably connected to a reference shaft, and the reference shaft is provided with at least two support rods.

[0008] Each support rod is rotatably connected to a support rod at its upper end. A torsion spring is mounted on the rotation shaft of the support rod. The end of the support rod is fixedly connected to a bearing mold. An air cylinder is fixed to the bottom of the bearing mold. A pull rod is mounted on the air cylinder. A round rod is provided on one side of the pull rod. A ring is fixedly connected to the vertical plate. The ring is coaxial with the reference axis. A first arc block and a second arc block are fixedly connected to one side of the ring. The outer arc surface of the first arc block faces the reference axis, and the outer arc surface of the second arc block faces outward. The round rod can slide to the outer arc surface of the first arc block or the second arc block.

[0009] Preferably, the bottom of the plate is provided with a groove, a slider is slidably connected in the groove, and a support spring is fixedly connected between the slider and the end of the groove.

[0010] Preferably, a guide rod is fixedly connected inside the groove, the slider is provided with a clearance hole, the guide rod passes through the clearance hole, and the guide rod passes through the inside of the support spring.

[0011] Preferably, a crossbar is fixedly connected inside the air cylinder, the crossbar has a guide hole, a pull rod is slidably connected to the guide hole, a piston is slidably connected inside the air cylinder, the piston is fixedly connected to the pull rod, and a first spring is fixedly connected between the piston and the crossbar.

[0012] Preferably, the end of the round rod is rotatably connected to a rolling column, which can roll to the outer arc surface of the first arc block or the second arc block.

[0013] Preferably, the bottom of the forming groove of the bearing mold is provided with multiple mounting holes, each mounting hole is provided with a connecting air passage between it and the air cylinder, each mounting hole is provided with a cover plate, and each cover plate is provided with multiple exhaust holes evenly distributed.

[0014] Preferably, a push rod is fixedly connected to the bottom of the cover plate.

[0015] Preferably, a baffle is fixedly connected to the bottom of the push rod, and a counterweight is installed inside the baffle.

[0016] Preferably, a buffer ring is fixedly connected to the upper side of the baffle.

[0017] Preferably, the buffer ring is a foam pad or a rubber pad.

[0018] Preferably, a conveyor belt is installed on the workbench.

[0019] The advantages of this invention are as follows: The electrospinning nanofiber mask manufacturing device provided by this invention is driven by a servo motor behind the vertical plate to rotate the workstation. First, the carrier mold is rotated to be directly below the axis of the pressing cylinder. Then, the cutting mold is pressed down and extends into the forming cavity of the carrier mold to cut out the mask sheet. At this time, the buffer spring is in a compressed state. In order to prevent the mask sheet from being pulled out together during the lifting of the cutting mold, the reference axis then causes the combined cutting mold and carrier mold to rotate together by an angle. During the rotation, the buffer spring pushes the cutting mold downward and, during the horizontal sliding of the cutting mold, it comes into contact with the cutting mold. During this process, the round rod acts on... The outer arc surface of the first arc block allows the pull rod to pull down and draw air, lifting the cutting mold during this process. The mask sheet is then drawn into the forming cavity of the supporting mold by negative pressure, preventing the mask sheet from being pulled out when the cutting mold is lifted, thus improving stability. This operation method only requires controlling the servo motor to rotate an additional angle, simplifying the control and improving operational stability. Finally, when the supporting mold at this station rotates to the bottom, the round rod acts on the outer arc surface of the second arc block, causing the pull rod to push and blow air, facilitating detachment. No air source or complex air circuit layout is required, thus improving work efficiency.

[0020] This invention uses multiple distributed small vent holes to prevent the mask sheet from adsorbing into the vent holes. On the other hand, when the cut carrier mold rotates to the bottom, it blows air to make the mask sheet fall off, and the push rod, under the action of the baffle's gravity, makes the cover plate expose the mounting hole, thus facilitating the falling of the mask sheet and avoiding adhesion, thereby improving the efficiency of mask sheet falling. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the basic structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the shearing device in this invention;

[0023] Figure 3 This is a schematic diagram of the cutting operation state of the shearing device in this invention;

[0024] Figure 4 yes Figure 3 Enlarged view of section E in the image;

[0025] Figure 5 yes Figure 3 Enlarged view of section F in the image;

[0026] Figure 6 This is a schematic diagram of the connection structure between the bearing mold and the air cylinder of the present invention;

[0027] Figure 7 yes Figure 6 A magnified view of point M in the image. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] Example 1

[0030] like Figure 1-6 As shown, the present invention provides an electrospun nanofiber mask manufacturing device, including a workbench 1, on which a conveyor belt 11 is installed for transporting cut mask sheets. A feeding roller 10 and a receiving roller 3 are provided on the upper side of the workbench 1. The feeding roller 10 is equipped with multiple feed rollers for providing different types of raw material layers. A shearing device 2 is provided between the feeding roller 10 and the receiving roller 3. The multiple layers of raw material on the feed rollers are collected on the shearing device 2 and cut by a cutting blade. With the cooperation of a hot melt blade, synchronous cutting can be achieved. The packaging achieves one-time molding, eliminating the need for reassembly and cutting of the three-layer side material. The cutting device 2 includes a vertical plate 21, with a horizontal plate 22 fixedly connected to the upper side of the vertical plate 21. The horizontal plate 22 is equipped with a pressing cylinder 23, and the lower end of the telescopic rod of the pressing cylinder 23 is fixedly connected to a flat plate 24. The bottom of the flat plate 24 is horizontally slidably connected to a slider 25, and a cutting mold 26 is installed at the bottom of the slider 25. A buffer spring is installed between the slider 25 and the cutting mold 26. The vertical plate 21 is rotatably connected to a reference shaft 27, and the reference shaft 27 is equipped with at least two support rods 28.

[0031] The upper end of the cutting die 26 is provided with a square hole, the slider 25 extends into the square hole and slides in connection, and the buffer spring is fixedly connected to the lower end of the slider 25 and the upper side of the cutting die 26.

[0032] Each support rod 28 is rotatably connected to a support rod 29 at its upper end. A torsion spring 291 is mounted on the rotation shaft of the support rod 29. The end of the support rod 29 is fixedly connected to a bearing mold 3. An air cylinder 31 is fixedly mounted at the bottom of the bearing mold 3. A pull rod 32 is mounted on the air cylinder 31. A round rod 33 is provided on one side of the pull rod 32. A ring 34 is fixedly connected to the vertical plate 21. The ring 34 is coaxial with the reference shaft 27. A first arc block 35 and a second arc block 36 are fixedly connected to one side of the ring 34. The outer arc surface of the first arc block 35 faces the reference shaft 27, and the outer arc surface of the second arc block 36 faces outward. The round rod 33 can slide to the outer arc surface of the first arc block 35 or the second arc block 36.

[0033] The reference axis 27 is driven by a servo motor behind the vertical plate 21 to rotate the workstation. First, the bearing mold 3 is rotated to be directly below the axis of the pressing cylinder 23. Then, the cutting mold 26 is pressed down and extends into the forming cavity of the bearing mold 3 to cut out the mask piece. At this time, the buffer spring is in a compressed state. In order to prevent the mask piece from being pulled out during the lifting of the cutting mold 26, the reference axis 27 causes the combined cutting mold 26 and the bearing mold 3 to rotate together by an angle. During the rotation, the buffer spring pushes the cutting mold 26 downward and makes contact with the cutting mold 26 during the horizontal sliding of the cutting mold 26. During this process, the round rod 33 acts on the outer arc of the first arc block 35. The pull rod 32 is pulled down to draw air, and during this process, the cutting mold 26 is lifted. The contact surface between the mask sheet and the forming cavity of the supporting mold 3 is adsorbed by negative pressure, thereby preventing the mask sheet from being pulled out when the cutting mold 26 is lifted off, thus improving stability. Moreover, this operation method only requires controlling the servo motor to rotate an additional angle, making the control method simple and improving the stability of operation. Finally, when the supporting mold 3 of this station rotates to the bottom, the round rod 33 acts on the outer arc surface of the second arc block 36, causing the pull rod 32 to push and blow air, which facilitates detachment. There is no need to provide an air source and complex air circuit layout, thereby improving work efficiency.

[0034] The bottom of the plate 24 is provided with a groove 241, and a slider 25 is slidably connected in the groove 241. A support spring 242 is fixedly connected between the slider 25 and the end of the groove 241. A guide rod 243 is fixedly connected in the groove 241. The slider 25 is provided with a clearance hole, and the guide rod 243 passes through the clearance hole and passes through the inside of the support spring 242. The plate 241 provides guidance and support for the horizontal sliding of the slider 25 and has strong adaptability.

[0035] A crossbar 311 is fixedly connected inside the air cylinder 31. The crossbar 311 has a guide hole. A pull rod 32 is slidably connected to the guide hole. A piston 312 is slidably connected inside the air cylinder 31. The piston 312 is fixedly connected to the pull rod 32. A first spring 313 is fixedly connected between the piston 312 and the crossbar 311. A rolling column 331 is rotatably connected to the end of the round rod 33. The rolling column 331 can roll to the outer arc surface of the first arc block 35 or the second arc block 36. When the rolling column 331 rolls to the outer arc surface of the first arc block 35 or the second arc block 36 intermittently, it reduces friction and makes the equipment operate more smoothly.

[0036] Example 2

[0037] like Figure 1-7As shown, based on Embodiment 1, in order to avoid the adverse effects of local blowing-adsorption on the mask sheet, the bottom of the forming groove of the bearing mold 3 is provided with multiple mounting holes 4, each mounting hole 4 is provided with a connecting air passage 41 between it and the air cylinder 31, each mounting hole 4 is provided with a cover plate 42, and each cover plate 42 is provided with multiple exhaust holes 43 evenly arranged; by setting multiple exhaust holes 43, the air pressure applied to the mask sheet is evenly distributed.

[0038] Furthermore, a push rod 44 is fixedly connected to the bottom of the cover plate 42, a baffle 45 is fixedly connected to the bottom of the push rod 44, a counterweight is installed inside the baffle 45, and a buffer ring 46 is fixedly connected to the upper side of the baffle 45. The buffer ring 46 is a foam pad or a rubber pad.

[0039] On the one hand, the multi-point distributed small exhaust holes 43 prevent the mask sheet from being adsorbed into the exhaust holes. On the other hand, when the cut carrier mold 3 rotates to the bottom, the mask sheet is blown off by air, and the cover plate 42 is exposed by the push rod 44 under the gravity of the baffle 45, thus making the installation hole 4 exposed. Together, they facilitate the falling of the mask sheet, thereby avoiding adhesion and improving the efficiency of mask sheet falling.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrospun nanofiber mask preparation device, comprising a workbench (1), a feeding roller (10) and a receiving roller (3) on the upper side of the workbench (1), a shearing device (2) between the feeding roller (10) and the receiving roller (3), the shearing device (2) comprising a vertical plate (21), a horizontal plate (22) fixedly connected to the upper side of the vertical plate (21), a pressing cylinder (23) provided on the horizontal plate (22), a flat plate (24) fixedly connected to the lower end of the telescopic rod of the pressing cylinder (23), a slider (25) horizontally slidably connected to the bottom of the flat plate (24), a cutting mold (26) installed at the bottom of the slider (25), a buffer spring installed between the slider (25) and the cutting mold (26), the vertical plate (21) being rotatably connected to a reference shaft (27), the reference shaft (27) being provided with at least two support rods (28); Its features are: Each support rod (28) is rotatably connected to a support rod (29) at its upper end. A torsion spring (291) is mounted on the rotation axis of the support rod (29). The end of the support rod (29) is fixedly connected to a bearing mold (3). An air cylinder (31) is fixed at the bottom of the bearing mold (3). A pull rod (32) is mounted on the air cylinder (31). A round rod (33) is provided on one side of the pull rod (32). A ring (34) is fixedly connected to the vertical plate (21). The ring (34) is coaxial with the reference axis (27). A first arc block (35) and a second arc block (36) are fixedly connected to one side of the ring (34). The outer arc surface of the first arc block (35) faces the reference axis (27). The outer arc surface of the second arc block (36) faces outward. The round rod (33) can slide to the outer arc surface of the first arc block (35) or the second arc block (36).

2. The electrospun nanofiber mask preparation device according to claim 1, characterized in that: The bottom of the plate (24) is provided with a groove (241), a slider (25) is slidably connected in the groove (241), and a support spring (242) is fixedly connected between the slider (25) and the end of the groove (241).

3. The electrospun nanofiber mask preparation device according to claim 2, characterized in that: The guide rod (243) is fixedly connected inside the groove (241). The slider (25) is provided with a clearance hole. The guide rod (243) passes through the clearance hole and passes through the inside of the support spring (242).

4. The electrospun nanofiber mask preparation device according to claim 2, characterized in that: A crossbar (311) is fixedly connected inside the air cylinder (31). The crossbar (311) has a guide hole. A pull rod (32) is slidably connected to the guide hole. A piston (312) is slidably connected inside the air cylinder (31). The piston (312) is fixedly connected to the pull rod (32). A first spring (313) is fixedly connected between the piston (312) and the crossbar (311).

5. The electrospun nanofiber mask preparation device according to claim 2, characterized in that: The end of the round rod (33) is rotatably connected to a rolling column (331), which can roll to the outer arc surface of the first arc block (35) or the second arc block (36).

6. The electrospun nanofiber mask preparation device according to claim 2, characterized in that: The bottom of the forming groove of the bearing mold (3) is provided with multiple mounting holes (4), and each mounting hole (4) is connected to the air cylinder (31) by a connecting air passage (41). Each mounting hole (4) is provided with a cover plate (42), and multiple exhaust holes (43) are evenly arranged on each cover plate (42).

7. The electrospinning nanofiber mask preparation device according to claim 1, characterized in that: The bottom of the cover plate (42) is fixedly connected to a push rod (44), and the bottom of the push rod (44) is fixedly connected to a baffle (45), which contains a counterweight.

8. The electrospun nanofiber mask preparation device according to claim 7, characterized in that: A buffer ring (46) is fixedly connected to the upper side of the baffle (45).

9. The electrospun nanofiber mask preparation device according to claim 8, characterized in that: The buffer ring (46) is a foam pad or a rubber pad.

10. The electrospun nanofiber mask preparation apparatus according to any one of claims 1 to 9, characterized in that: A conveyor belt (11) is installed on the workbench (1).

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