Melt-blowing die head for nanofiber preparation

Abstract

The utility model discloses a melt-blowing die head for nanofiber preparation. The melt-blowing die head comprises a die head body and a connector, the front end of the die head body is provided with a mounting groove for mounting a spinneret plate, an opening of the mounting groove is provided with a fixing ring groove, the fixing ring groove is in threaded connection with a fixing head for fixing the front end of the spinneret plate, and the connector comprises a connecting end connected with the input end of the spinneret plate. The fixing head and the fixing ring groove are assembled to fix the spinneret plate, the positioning groove formed in the front end of the fixing head can be clamped with the front end of the spinneret plate, the accuracy of the mounting position is ensured, one end of the connector penetrates out of the rear end of the fixing head after being connected with the input end of the spinneret plate, and the connector is fixed through the locking nut. According to the whole device, the spinneret plate is convenient to disassemble and assemble, and the installation stability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber manufacturing, in particular to a melt-blowing die head for preparing nanofibers. Background Art

[0002] Meltblowing is a commonly used technology for large-scale preparation of micro-nano fibers. It mainly prepares ultrafine fibers through the stretching effect of high-speed airflow on hot melt polymers and lays them into a net to form meltblown nonwoven fabrics. Compared with other methods for preparing micro-nano fibers, meltblowing has attracted widespread attention for its advantages such as large output and no need for solvents; the important development trend of meltblown nonwoven technology is to prepare finer fibers without increasing too much cost. At present, the diameter of meltblown fibers is mostly between 1μm and 5μm. Because of its fine fibers, many pores, small pore size, and tree root-like channel system, the filtration efficiency is more than 99.9%. It is widely used in medical, chemical, energy, machinery, electronics, automobile, environmental protection and other fields. If the fiber can be stably fine to the nanometer level, the filtration performance and adsorption performance of the product will be greatly improved, and the application prospects in the above fields and even other fields will be more extensive.

[0003] In the prior art, the spinneret installed on the meltblowing die head is prone to clogging, is inconvenient to disassemble and replace, and the fiber is easy to break and the melt is easy to stick to the die head. In order to solve the above problems, the utility model proposes a nanofiber preparation meltblowing die head. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a melt-blown die head for preparing nanofibers, which can facilitate the disassembly or replacement of the spinneret plate and improve the operating stability of the equipment.

[0005] The technical solution adopted by the utility model is: a nanofiber preparation meltblowing die head, including a die head body and a connector; the front end of the die head is provided with a mounting groove for mounting a spinneret, the opening of the mounting groove is provided with a fixing ring groove, the fixing ring groove is screwed with a fixing head for fixing the front end of the spinneret, the center of the fixing head is provided with a positioning groove adapted to the cross-section of the output end of the spinneret, and the front end of the fixing head is provided with a spray outlet connected to the positioning groove; the connector includes a connecting end connected to the input end of the spinneret, the connecting end passes through the rear end of the die head, and a locking nut for fixing the connecting head is provided on the connecting end, and a sealing interface is also provided at the end of the connecting end.

[0006] The utility model installs the spinneret structure in the installation groove arranged at the front end of the die body, and fixes the spinneret by assembling the fixed head and the fixed ring groove. Not only can the positioning groove arranged at the front end of the fixed head be engaged with the front end of the spinneret to ensure the accuracy of the installation position, but one end of the connector is connected to the input end of the spinneret and then passes through the rear end of the fixed head, and the connector is fixed by a locking nut. The other end of the connector is connected to the preparation equipment through a sealing interface. The whole device is convenient for disassembling and assembling the spinneret. After the spinneret is blocked, it can be quickly disassembled for replacement and maintenance. The whole die head has high installation stability, which can improve production material placement.

[0007] Preferably, an air flow channel connected to the spray outlet is provided on the outer periphery of the lower end of the fixed head.

[0008] Preferably, a connecting valve connected to an air flow channel is provided on the outer periphery of the fixing head.

[0009] Preferably, fixing holes are provided on both sides of the lower end of the fixing head, and fixing screws for installing the fixing head are provided in the fixing holes.

[0010] Preferably, a steady flow nozzle arranged around the ejection port is provided at the front end of the fixed head, and the steady flow nozzle is arranged in a cone shape.

[0011] Preferably, a buffer ring is provided on the top wall of the mounting groove, and the buffer ring abuts against the upper end surface of the spinneret.

[0012] Preferably, the positioning groove is provided with circumferentially arranged elastic positioning protrusions, and the elastic positioning protrusions abut against the positioning portion provided at the front end of the spinneret.

[0013] The beneficial effects of the utility model are as follows: the utility model installs the spinneret structure in the installation groove arranged at the front end of the die body, and fixes the spinneret by assembling the fixed head and the fixed ring groove. Not only can the positioning groove arranged at the front end of the fixed head be engaged with the front end of the spinneret to ensure the accuracy of the installation position, one end of the connector is connected to the input end of the spinneret and then passes through the rear end of the fixed head, and the connector is fixed by a locking nut. The other end of the connector is connected to the preparation equipment through a sealing interface. The entire device is convenient for disassembling and assembling the spinneret, has high installation stability, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0015] Figure 1 A cross-sectional view of a meltblowing die head for preparing nanofibers provided in an embodiment of the present invention.

[0016] Figure 2 This is an assembly diagram of a meltblowing die head for preparing nanofibers provided in an embodiment of the present utility model.

[0017] Figure markings: die body 100, connecting head 200, mounting groove 110, fixing ring groove 120, fixing head 300, positioning groove 310, positioning protrusion 311, spray port 320, air flow channel 330, locking nut 400, sealing interface 500, connecting valve 600, steady flow nozzle 700, buffer ring 800. DETAILED DESCRIPTION

[0018] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0019] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0020] like Figure 1 and Figure 2 As shown, a specific embodiment of the utility model provides a meltblown die head for preparing nanofibers, which is convenient for installing or replacing different spinnerets; specifically, it includes a die head body 100 and a connector 200; a mounting groove 110 for mounting the spinneret is provided at the front end of the die head, and a fixing ring groove 120 is provided at the opening of the mounting groove 110, and a fixing head 300 for fixing the front end of the spinneret is screwed to the fixing ring groove 120, and a positioning groove 310 adapted to the cross-section of the output end of the spinneret is provided at the center of the fixing head 300, and a spray outlet 320 connected to the positioning groove 310 is provided at the front end of the fixing head 300; the connector 200 includes a connecting end connected to the input end of the spinneret, the connecting end passes through the rear end of the die head, and a locking nut 400 for fixing the connecting head 200 is provided on the connecting end, and a sealing interface 500 is also provided at the end of the connecting end.

[0021] like Figure 1 and Figure 2As shown, through the above-mentioned arrangement, the mounting groove 110 provided at the front end of the die body 100 can be used to install the spinneret structure. After the spinneret is assembled in the mounting groove 110, the spinneret is fixed by assembling the fixed head 300 and the fixed ring groove 120. The positioning groove 310 provided at the front end of the fixed head 300 can be engaged with the front end of the spinneret to ensure the accuracy of the installation position. After one end of the connector 200 is connected to the input end of the spinneret, it passes through the rear end of the fixed head 300 and is fixed by the locking nut 400. The other end of the connector 200 is connected to the preparation equipment through the sealing interface 500. The entire device is convenient for disassembling and assembling the spinneret. After the spinneret is blocked, it can be quickly disassembled for replacement and maintenance. At the same time, the installation stability is high, which improves the operation stability of the equipment.

[0022] like Figure 1 and Figure 2 As shown, in this embodiment, an air flow channel 330 connected to the ejection outlet 320 is provided at the periphery of the lower end of the fixed head 300, and a connecting valve 600 connected to the air flow channel 330 is provided at the periphery of the fixed head 300. The air pressure device can be connected through the connecting valve 600, and the air flow is transported to the ejection outlet 320 through the air flow channel 330. At the same time, in this embodiment, a steady flow nozzle 700 arranged around the ejection outlet 320 is provided at the front end of the fixed head 300, and the steady flow nozzle 700 is arranged in a conical shape. The steady flow nozzle 700 is provided to ensure the stability of the air flow and improve the melt-blowing effect.

[0023] like Figure 1 and Figure 2 As shown, in order to improve the firmness of the fixing head 300 in mounting the spinneret, fixing holes are provided on both sides of the lower end of the fixing head 300 in this embodiment, and fixing screws for mounting the fixing head 300 are provided in the fixing holes. In this way, by mounting the fixing head 300 through the fixing screws, the assembly stability can be improved on the one hand, and the loosening of the internal spinneret can also be prevented.

[0024] like Figure 1 and Figure 2 As shown, since the upper end of the spinneret needs to be inserted into the mounting groove 110 for assembly, a buffer ring 800 is provided on the top wall of the mounting groove 110 in this embodiment, and the buffer ring 800 abuts against the upper end surface of the spinneret. When the upper end of the spinneret is inserted into the mounting groove 110 and abuts against the buffer ring 800, it is beneficial to eliminate the stress of the spinneret and avoid damage to the spinneret; the front end of the spinneret is positioned by the positioning groove 310 of the fixed head 300. In this embodiment, a circumferentially arranged elastic positioning protrusion 311 is provided in the positioning groove 310, and the elastic positioning protrusion 311 abuts against the positioning portion provided at the front end of the spinneret. When the fixed head 300 is fixed to the die body 100, the front end of the spinneret contacts the positioning groove 310, and the positioning protrusion 311 abuts against the positioning portion, thereby ensuring the accuracy of the assembly position of the spinneret and the assembly stability.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A melt-blown die head for preparing nanofibers, characterized in that; It comprises a die body (100) and a connector (200); The front end of the die head is provided with a mounting groove (110) for mounting the spinneret, the opening of the mounting groove (110) is provided with a fixing ring groove (120), the fixing ring groove (120) is screwed with a fixing head (300) for fixing the front end of the spinneret, the center of the fixing head (300) is provided with a positioning groove (310) adapted to the cross section of the output end of the spinneret, and the front end of the fixing head (300) is provided with a spray outlet (320) connected with the positioning groove (310); The connector (200) comprises a connector end connected to the spinneret input end, the connector end passes through the rear end of the die head, and a locking nut (400) is provided on the connector end for fixing the connector (200), and a sealing interface (500) is also provided at the end of the connector end.

2. The nanofiber preparation melt-blowing die head according to claim 1, characterized in that; An air flow channel (330) communicating with the spray port (320) is provided on the outer periphery of the lower end of the fixed head (300).

3. The nanofiber preparation meltblowing die head according to claim 2, characterized in that: The outer periphery of the fixed head (300) is provided with a connection valve (600) connected to the air flow channel (330).

4. The nanofiber preparation melt-blowing die head according to claim 1, characterized in that: Fixing holes are provided at both sides of the lower end of the fixing head (300), and fixing screws for installing the fixing head (300) are provided in the fixing holes.

5. The nanofiber preparation melt-blowing die head according to claim 1, characterized in that: The front end of the fixed head (300) is provided with a steady flow nozzle (700) arranged around the spray port (320), and the steady flow nozzle (700) is arranged in a conical shape.

6. The nanofiber preparation melt-blowing die head according to claim 1, characterized in that: A buffer ring (800) is provided on the top wall of the installation groove (110), and the buffer ring (800) abuts against the upper end surface of the spinneret.

7. The nanofiber preparation melt-blowing die head according to claim 1, characterized in that: The positioning groove (310) is provided with circumferentially arranged elastic positioning protrusions (311), and the elastic positioning protrusions (311) abut against the positioning portion provided at the front end of the spinneret.

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