A profiled hole spinneret

Abstract

This utility model discloses a spinneret with irregularly shaped holes, including a spinneret body with a plurality of irregularly shaped spinnerets distributed on the body. The cross-section of each irregularly shaped spinneret is an irregular section with several protrusions. The feed end of each irregularly shaped spinneret has a central guide hole and a plurality of oblique guide holes. Along the melt flow direction, the central guide hole gradually narrows to connect with the irregularly shaped spinnerets, and the central guide hole gradually transitions from a circular cross-section to an irregular cross-section. The plurality of oblique guide holes are circumferentially distributed around the central guide hole, and each oblique guide hole corresponds one-to-one with a plurality of protrusions. Along the melt flow direction, the oblique guide holes extend obliquely to the protrusions connecting with the irregularly shaped spinnerets. This utility model uses a central guide hole and a plurality of circumferentially distributed oblique guide holes at the feed end of the irregularly shaped spinnerets for flow guidance. The combination of the central guide hole and the oblique guide holes is more uniform in the circumferential direction, which can reduce the disturbance differences to the surrounding spinning melt.

Description

Technical Field

[0001] This utility model relates to the field of spinning components, and in particular to a spinneret with irregularly shaped holes. Background Technology

[0002] In a spinning assembly, the spinning melt is distributed uniformly by a distribution plate and flows to the spinneret, where it is extruded through the spinneret orifices to form spun fibers. However, for irregularly shaped spinnerets, such as cross-shaped, triangular, or trefoil-shaped spinnerets, the spinnerets themselves are not circumferentially uniform. As the spinning melt flows through a particular irregularly shaped spinneret, it disturbs the surrounding spinning melt, thus affecting other irregularly shaped spinnerets around it. Furthermore, this disturbance is not circumferentially uniform, resulting in slight differences in the spinning flow rate within each irregularly shaped spinneret, ultimately affecting the uniformity of the fineness of the produced spun fibers. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a spinneret with irregular orifice. At the feed end of the irregular orifice, a central guide hole and several oblique guide holes distributed in a circumferential direction are provided for guiding the flow. The combination of the central guide hole and several oblique guide holes is more uniform in the circumferential direction, which can reduce the disturbance difference to the surrounding spinning melt.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a shaped spinneret, comprising a spinneret body with a plurality of shaped spinnerets distributed on the spinneret body. The cross-section of the shaped spinnerets is an irregular cross-section with a plurality of protrusions. The feed end of the shaped spinnerets is provided with a central guide hole and a plurality of oblique guide holes. Along the melt flow direction, the central guide hole gradually narrows to connect with the shaped spinnerets, and the central guide hole gradually transitions from a circular cross-section to an irregular cross-section. The plurality of oblique guide holes are distributed circumferentially around the central guide hole, and the plurality of oblique guide holes correspond one-to-one with the plurality of protrusions. Along the melt flow direction, the oblique guide holes extend obliquely to the protrusions connecting with the shaped spinnerets.

[0005] Furthermore, an annular guide groove is provided outside the central guide hole, and the annular guide groove is coaxial with the central guide hole; the feed inlets of a number of oblique guide holes distributed circumferentially outside the central guide hole are all located within the annular guide groove.

[0006] Furthermore, several of the oblique guide holes are distributed circumferentially at equal angles around the central guide hole.

[0007] Furthermore, the width of the annular guide groove gradually narrows towards its depth.

[0008] Furthermore, the feed inlet of the inclined guide hole is connected to the bottom of the annular guide groove, and the feed inlet of the inclined guide hole is a tapering opening.

[0009] Furthermore, the outlet of the oblique guide hole is connected to the junction of the irregular spinneret hole and the central guide hole.

[0010] Furthermore, the irregularly shaped spinneret is divided into a variable diameter section and a micro-orifice section along the melt flow direction; in the variable diameter section, the diameter of the irregularly shaped spinneret gradually narrows; in the micro-orifice section, the diameter of the irregularly shaped spinneret remains unchanged.

[0011] Beneficial effects: This utility model discloses a spinneret with irregularly shaped holes. A central guide hole is provided at the feed end of the irregularly shaped spinneret holes. The central guide hole gradually transitions from a circular cross-section to an irregularly shaped cross-section along the melt flow direction. Outside the central guide hole are an annular guide groove and several oblique guide holes. The feed inlets of the oblique guide holes are all located within the annular guide groove, and the discharge outlets of the oblique guide holes are connected to the junction of the irregularly shaped spinneret holes and the central guide hole. The cooperation of the central guide hole, the annular guide groove, and the oblique guide holes improves the circumferential uniformity of the feed end of the irregularly shaped spinneret holes. When the spinning melt flows through a certain irregularly shaped spinneret hole, the disturbance difference to other surrounding irregularly shaped spinnerets is small, thus reducing the difference in spinning flow rate within each irregularly shaped spinneret hole and helping to improve the fineness uniformity of the produced spun fibers. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the irregularly shaped spinneret holes on a spinneret plate.

[0013] Appendix Figure 2 This is a cross-sectional view of an irregularly shaped spinneret orifice;

[0014] Appendix Figure 3 This is a top view of an irregularly shaped spinneret. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] As attached Figures 1 to 3 The aforementioned irregularly shaped spinneret includes a spinneret body 1 with a plurality of irregularly shaped spinneret holes 2 distributed on the spinneret body 1. The cross-section of the irregularly shaped spinneret holes 2 is an irregular cross-section with a plurality of protrusions 3. If the cross-section of the irregularly shaped spinneret hole 2 is a cross-shaped cross-section, then there are four protrusions 3 on the cross-shaped cross-section. If the cross-section of the irregularly shaped spinneret hole 2 is a trilobal cross-section, then there are three protrusions 3 on the trilobal cross-section.

[0017] For the irregularly shaped spinneret 2, since the irregularly shaped spinneret 2 itself is not circumferentially uniform, when the spinning melt flows through a certain irregularly shaped spinneret 2, it will cause disturbance to the spinning melt around it, which in turn affects other irregularly shaped spinnerets 2 around this irregularly shaped spinneret 2. Moreover, this disturbance effect is not circumferentially uniform, resulting in slight differences in the spinning flow rate in each irregularly shaped spinneret 2, ultimately affecting the fineness uniformity of the produced spun fibers.

[0018] Therefore, in this invention, a central guide hole 4 and several oblique guide holes 5 are provided at the feed end of the irregularly shaped spinneret 2, i.e., the end where the spinning melt flows into the irregularly shaped spinneret 2. Along the flow direction of the spinning melt, the central guide hole 4 gradually narrows to connect with the irregularly shaped spinneret 2, and the central guide hole 4 gradually transitions from a circular cross-section to an irregularly shaped cross-section. Several oblique guide holes 5 are distributed circumferentially around the central guide hole 4, and the number of oblique guide holes 5 is consistent with the number of protrusions 3 on the irregularly shaped cross-section; each oblique guide hole 5 corresponds to one protrusion 3. Along the flow direction of the spinning melt, the oblique guide holes 5 extend obliquely to the protrusions 3 connecting with the irregularly shaped spinneret 2. The combination of the central guide hole 4 and several oblique guide holes 5 results in a more uniform circumferential direction, reducing disturbance differences to the surrounding spinning melt and improving the fineness uniformity of the produced spun fibers.

[0019] Furthermore, in this invention, the combination of a central guide hole 4 and several oblique guide holes 5 is used to simulate the shape characteristics of the irregularly shaped spinneret 2 in order to make the spinning flow rate of each part within the irregularly shaped spinneret 2 more uniform. If only the central guide hole 4 is used, the flow rate in the central part of the irregularly shaped cross-section will be greater during the transition from a circular cross-section to an irregular cross-section, while the spinning flow rate allocated to each protrusion 3 will be less, resulting in uneven flow rate distribution among the various parts within the irregularly shaped spinneret 2. Therefore, the oblique guide holes 5 are used to supplement the protrusions 3 with an additional portion of the spinning flow rate, thereby making the spinning flow rate distributed among the various parts within the irregularly shaped spinneret 2 more uniform.

[0020] To further improve the circumferential uniformity of the feed end of the irregularly shaped spinneret 2, an annular guide groove 6 is concentrically arranged outside the central guide hole 4, and the annular guide groove 6 is coaxial with the central guide hole 4. The feed inlets of several oblique guide holes 5 distributed circumferentially outside the central guide hole 4 are all located within the annular guide groove 6. The width of the annular guide groove 6 gradually narrows towards its depth; in one embodiment, the vertical cross-section of the annular guide groove 6 is semi-circular. The feed inlets of the oblique guide holes 5 are connected to the bottom of the annular guide groove 6. The feed inlets of the oblique guide holes 5 are tapered, gradually narrowing along the flow direction of the spinning melt.

[0021] Several of the oblique guide holes 5 are distributed at equal angles around the central guide hole 4. Because they are distributed at equal angles, the circumferential uniformity is higher.

[0022] The outlet of the oblique guide hole 5 is connected to the junction of the irregular spinneret hole 2 and the central guide hole 4, so that the central guide hole 4 and several oblique guide holes 5 can together guide the spinning flow into the irregular spinneret hole 2, thereby making the spinning flow of the central part of the irregular spinneret hole 2 and each protrusion 3 more uniform.

[0023] As attached Figure 2 As shown, the irregularly shaped spinneret 2 is divided into a variable diameter section 7 and a micro-orifice section 8 along the melt flow direction. In the variable diameter section 7, the orifice diameter of the irregularly shaped spinneret 2 gradually narrows. In the micro-orifice section 8, the orifice diameter of the irregularly shaped spinneret 2 remains unchanged. After the spinning melt enters the irregularly shaped spinneret 2, it passes through the variable diameter section 7 and the micro-orifice section 8 in sequence, and then exits to form spun fibers.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A spinneret with irregularly shaped holes, characterized in that: The device includes a spinneret body (1), on which several irregularly shaped spinneret holes (2) are distributed. The cross-section of the irregularly shaped spinneret holes (2) is an irregular cross-section with several protrusions (3). The feed end of the irregularly shaped spinneret holes (2) is provided with a central guide hole (4) and several oblique guide holes (5). Along the melt flow direction, the central guide hole (4) gradually narrows to connect with the irregularly shaped spinneret holes (2), and the central guide hole (4) gradually transitions from a circular cross-section to an irregular cross-section. Several oblique guide holes (5) are distributed circumferentially around the central guide hole (4), and several oblique guide holes (5) correspond one-to-one with several protrusions (3). Along the melt flow direction, the oblique guide holes (5) extend obliquely to the protrusions (3) connecting with the irregularly shaped spinneret holes (2).

2. The irregularly shaped spinneret according to claim 1, characterized in that: An annular guide groove (6) is provided outside the central guide hole (4), and the annular guide groove (6) is coaxial with the central guide hole (4); the feed inlets of several oblique guide holes (5) distributed circumferentially outside the central guide hole (4) are all located inside the annular guide groove (6).

3. The irregularly shaped spinneret according to claim 2, characterized in that: Several of the oblique guide holes (5) are distributed at equal angles around the central guide hole (4).

4. A spinneret with irregularly shaped holes according to claim 2, characterized in that: The width of the annular guide groove (6) gradually narrows towards the depth direction of the annular guide groove (6).

5. A spinneret with irregularly shaped holes according to claim 4, characterized in that: The feed inlet of the inclined guide hole (5) is connected to the bottom of the annular guide groove (6), and the feed inlet of the inclined guide hole (5) is a tapered opening.

6. A spinneret with irregularly shaped holes according to claim 1, characterized in that: The outlet of the oblique guide hole (5) is connected to the junction of the irregular spinneret hole (2) and the central guide hole (4).

7. A spinneret with irregularly shaped holes according to claim 1, characterized in that: The irregular spinneret (2) is divided into a variable diameter section (7) and a micro-orifice section (8) along the melt flow direction; in the variable diameter section (7), the diameter of the irregular spinneret (2) gradually narrows; in the micro-orifice section (8), the diameter of the irregular spinneret (2) remains unchanged.

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