Spray head for high-pressure spinning

Abstract

The utility model discloses a nozzle for high-pressure spinning, which comprises a nozzle main body and a nozzle sleeve, and the nozzle main body is in threaded connection with the nozzle sleeve. The spray head main body comprises a main body part, a cylindrical connecting body and a disc baffle plate, the main body part of the spray head main body is provided with a solution inlet channel and a solution outlet channel, one end of the cylindrical connecting body is connected with the main body part, and the other end of the cylindrical connecting body is connected with the disc baffle plate; the number of the cylindrical connecting bodies is multiple. The nozzle sleeve is provided with a spinning outlet; a spinning solution penetrates through the solution inlet channel and the solution outlet channel of the spray head body and then is sprayed out from the side face of the cylindrical connecting body under the action of the disc baffle to form microfibers, and the microfibers are sprayed out through the spinning outlet of the spray head sleeve. According to the spinning device, the utilization rate and the acting effect of a solution can be improved, the spinning effect is improved, and microfibers meeting the fineness requirement can be obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of fiber spinning, and particularly relates to a nozzle for high-pressure spinning. Background Art

[0002] Spinning, also known as chemical fiber forming, is a process for manufacturing chemical fibers. It is a process of extruding certain high molecular compounds into a colloidal solution or melting them into a melt and then forming chemical fibers by pressing them out through the fine holes of a spinning nozzle. Among them, the role of the spinning nozzle is to transform the viscous polymer melt or solution into a thin stream with a specific cross-sectional shape through the micropores, and then solidify it through a coagulation medium such as air or a coagulation bath to form a filament. The spinning effect is related to factors such as the physical properties of the spinning melt, the structural parameters of the spinning nozzle, the flow rate and pressure of the melt. For example, the greater the viscosity, surface tension and density of the melt, the corresponding spinning nozzle aperture and pressure need to be adjusted accordingly. The structural parameters of the spinning nozzle, such as diameter, outlet shape and angle, also affect the spinning ejection effect.

[0003] Existing spinning methods include electrospinning, supercritical fluid method, gel freeze-drying method, etc. Among them, the supercritical fluid method generally adds supercritical carbon dioxide to the extrusion equipment, uniformly mixes the molten polymer and supercritical carbon dioxide to obtain a supercritical spinning fluid, and the supercritical spinning fluid is extruded through the spinning nozzle after adjusting the pressure and flow rate to form filaments. The existing spinning nozzle structure is not applicable to the high-pressure spinning technology of the supercritical fluid method. The fluid can only be directly ejected from the middle nozzle of the nozzle, and the utilization rate and effect of the melt are not good, and it is difficult to obtain microfibers that meet the fineness requirements. Summary of the Utility Model

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a nozzle for high-pressure spinning, which can improve the utilization rate and effect of the melt, improve the spinning effect, and can obtain microfibers that meet the fineness requirements.

[0005] In order to achieve the above technical purpose and reach the above technical effect, the utility model is realized through the following technical solutions:

[0006] A nozzle for high-pressure spinning, comprising a nozzle body and a nozzle sleeve, wherein the nozzle body is threadedly connected to the nozzle sleeve; the nozzle body includes a main body portion, a cylindrical connecting body and a disc baffle, the main body portion of the nozzle body has a melt inlet passage and a melt outlet passage, one end of the cylindrical connecting body is connected to the main body portion, and the other end is connected to the disc baffle; the number of the cylindrical connecting bodies is multiple; the nozzle sleeve has a spinning outlet; after the spinning melt passes through the melt inlet passage and the melt outlet passage of the nozzle body, under the action of the disc baffle, it sprays out from the side of the cylindrical connecting body to form microfibers, and the microfibers are sprayed out through the spinning outlet of the nozzle sleeve.

[0007] Further, the aperture diameter of the end of the melt inlet passage of the main body portion of the nozzle body gradually decreases.

[0008] Further, the melt outlet passage of the nozzle body is a conical structure, and its cone angle is 12°, 15° or 20°.

[0009] Further, the portion of the nozzle body in contact with the nozzle sleeve is provided with an external thread, the nozzle sleeve has an internal thread, and the nozzle sleeve is connected to the nozzle body through the cooperation of the internal thread and the external thread.

[0010] Furthermore, the portion of the nozzle body in contact with the nozzle sleeve is a conical structure, correspondingly, the portion of the nozzle sleeve provided with the internal thread is a conical structure.

[0011] Further, a right-angled boss is provided on the outer side of the nozzle body, and the right-angled boss of the nozzle body abuts against the end of the nozzle sleeve.

[0012] Further, the spinning outlet of the nozzle sleeve is a conical orifice.

[0013] Furthermore, the cone angle of the spinning outlet of the nozzle sleeve is 12°.

[0014] The beneficial effects of the present utility model are:

[0015] The nozzle for high-pressure spinning of the present utility model includes a nozzle body and a nozzle sleeve. The nozzle body includes a main body portion, a cylindrical connecting body and a disc baffle. The nozzle body has a melt inlet passage and a melt outlet passage. One end of the cylindrical connecting body is connected to the main body portion, and the other end is connected to the disc baffle. The number of the cylindrical connecting bodies is multiple. The nozzle sleeve has a spinning outlet. When applied to supercritical carbon dioxide spinning, after the spinning melt is pushed by a pressure pump or other devices through the melt inlet passage and the melt outlet passage of the nozzle body, under the action of the disc baffle, a shear force is generated and it sprays out from the side of the cylindrical connecting body to form many fine microfibers, and these microfibers are sprayed out through the spinning outlet of the nozzle sleeve along with the movement of the air flow pressure.

[0016] The nozzle for high-pressure spinning of the present utility model has a novel structure, which can improve the utilization rate and action effect of the melt, enhance the spinning effect, and obtain microfibers that meet the fineness requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the nozzle for high-pressure spinning of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the nozzle body in the present utility model.

[0019] Figure 3 It is a schematic structural diagram of the nozzle sleeve in the present utility model.

[0020] Figure 4 It is a distribution schematic diagram of the cylindrical connecting body in the present utility model.

[0021] In the figure, 1: nozzle body, 11: main body part, 111: melt inlet channel, 112: melt outlet channel, 113: right-angled boss, 12: cylindrical connecting body, 13: disc baffle; 2: nozzle sleeve, 21: sleeve hole, 22: spinning outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 to 4 shown in a preferred embodiment of a nozzle for high-pressure spinning, it includes a nozzle body 1 and a nozzle sleeve 2. The nozzle body 1 is threadedly connected to the nozzle sleeve 2; specifically, the nozzle sleeve 2 has a sleeve hole 21, the upper part of which has internal threads, and the lower part of the nozzle body 1 (the part in contact with the nozzle sleeve) has external threads; the nozzle sleeve 2 is connected to the nozzle body 1 through the cooperation of the internal threads and the external threads.

[0024] The nozzle body 1 includes a main body portion 11, a cylindrical connecting body 12, and a disc baffle 13. The main body portion of the nozzle body 1 has a melt inlet passage 111 and a melt outlet passage 112. The aperture diameter at the end of the melt inlet passage 111 of the nozzle body 1 gradually decreases, which can increase the fluid flow rate during spinning; the melt outlet passage 112 of the nozzle body 1 is a conical structure, and its cone angle is 12°, 15°, or 20°; a plurality of the cylindrical connecting bodies 12 are provided, one end of the cylindrical connecting body 12 is connected to the main body portion 11, and the other end is connected to the disc baffle 13; in this preferred embodiment, the cylindrical connecting body 12 is connected to the main body portion 11 and the disc baffle 13 by welding; the disc baffle 13 is a solid circular plate; the plurality of cylindrical connecting bodies 12 are evenly distributed along the disc baffle 13; as Figure 4 shown, in this preferred embodiment, the number of the cylindrical connecting bodies 12 is set to 6.

[0025] The nozzle sleeve 2 has a spinning outlet; the spinning outlet 22 of the nozzle sleeve 2 is a conical opening. The cone angle of the spinning outlet 22 of the nozzle sleeve 2 is 12°.

[0026] As Figure 1 shown, after the spinning melt passes through the melt inlet passage 111 and the melt outlet passage 112 of the nozzle body 1, under the action of the disc baffle 13, it sprays out from the side of the cylindrical connecting body 12 to form microfibers, and the microfibers are sprayed out through the spinning outlet 22 of the nozzle sleeve 2.

[0027] The portion of the nozzle body 1 in contact with the nozzle sleeve is a conical structure. Correspondingly, the portion of the nozzle sleeve 2 provided with internal threads is also a conical structure.

[0028] A right-angled boss 113 is provided on the outer side of the nozzle body 1, and the right-angled boss 113 of the nozzle body 1 abuts against the end of the nozzle sleeve 2 to limit the connection of the nozzle sleeve 2 on the nozzle body 1 and further improve the connection reliability between the nozzle body 1 and the nozzle sleeve 2.

[0029] The upper part of the nozzle body 1 is a conical structure and has an external thread for connection with an external connecting device.

[0030] When applied to supercritical carbon dioxide spinning, the molten polymer and supercritical carbon dioxide are uniformly mixed to obtain a supercritical spinning melt. The supercritical spinning melt passes through the melt inlet passage 111 and the melt outlet passage 112 of the nozzle body 1 under the push of a pressure pump or other devices, and then under the action of the disc baffle 13, a shear force is generated to spray out from the side of the cylindrical connecting body 12 to form many fine microfibers, and these microfibers are sprayed out through the spinning outlet 22 of the nozzle sleeve 2 along with the movement of the air flow pressure.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model.

[0032] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A nozzle for high pressure spinning, characterized in that: It includes a nozzle body and a nozzle sleeve, and the nozzle body is connected to the nozzle sleeve by threads; the nozzle body includes a main body, a cylindrical connector and a disc baffle, the main body of the nozzle body has a melt inlet channel and a melt outlet channel, one end of the cylindrical connector is connected to the main body, and the other end is connected to the disc baffle; the number of the cylindrical connectors is multiple; the nozzle sleeve has a spinning outlet; after the spinning melt passes through the melt inlet channel and the melt outlet channel of the nozzle body, it is ejected from the side of the cylindrical connector under the action of the disc baffle to form microfibers, and the microfibers are ejected through the spinning outlet of the nozzle sleeve.

2. A nozzle for high pressure spinning according to claim 1, characterized in that: The terminal aperture of the melt inlet channel of the main body of the nozzle body gradually decreases.

3. A nozzle for high pressure spinning according to claim 1, characterized in that: The melt outlet channel of the nozzle body is a conical structure, and its cone angle is 12°, 15° or 20°.

4. A nozzle for high pressure spinning according to claim 1, characterized in that: The portion of the nozzle body connected to the nozzle sleeve is provided with an external thread, the nozzle sleeve has an internal thread, and the nozzle sleeve is connected to the nozzle body through the cooperation of the internal thread and the external thread.

5. A nozzle for high pressure spinning according to claim 4, characterized in that: The portion of the nozzle body connected to the nozzle sleeve is a conical structure, and correspondingly, the portion of the nozzle sleeve provided with the internal thread is a conical structure.

6. A nozzle for high pressure spinning according to claim 1 or 4, characterized in that: A right-angle boss is arranged on the outer side of the nozzle body, and the right-angle boss of the nozzle body abuts against the end of the nozzle sleeve.

7. A nozzle for high pressure spinning according to claim 1, characterized in that: The spinning outlet of the nozzle sleeve is a tapered outlet.

8. A nozzle for high pressure spinning according to claim 7, characterized in that: The cone angle of the spinning outlet of the nozzle sleeve is 12°.

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