CN107904675B

CN107904675B - Fiber spinning cap

Info

Publication number: CN107904675B
Application number: CN201711314912.6A
Authority: CN
Inventors: 王克璋
Original assignee: Jinan Acetate Chemical Co ltd
Current assignee: Jinan Acetate Chemical Co ltd
Priority date: 2017-12-11
Filing date: 2017-12-11
Publication date: 2023-05-23
Anticipated expiration: 2037-12-11
Also published as: CN107904675A

Abstract

A fiber spinning spinneret cap comprises a bottom plate, wherein penetrating spinneret holes are distributed on the bottom plate; the spinneret hole sequentially comprises a large guide wire cone part, a guide screw tap part and a straight wire outlet hole, and the large end of the large guide wire cone part is provided with a chamfer part; the cross sections of the large guide wire cone part and the small guide wire cone part are regular triangles, and each side surface is an inclined surface; the oblique angle of each side surface of the large guide wire cone is larger than that of each side surface of the small guide wire cone; the cross section of the straight hole for the filament is in a regular triangle shape, and the three side surfaces are all straight surfaces. The spinning cap is matched with the three sections of the chamfer part, the large guide wire cone part and the small guide wire cone part and the sizes and angles of the parts before the straight hole is used for discharging the yarn, so that the spinning solution is emitted according to the set direction, the smooth ejection of the spinning solution is ensured, the spinning efficiency is high, the operation is stable, and the spinning quality is ensured.

Description

Fiber spinning cap

Technical Field

The invention relates to a spinning cap used in a spinning machine for producing acetate fibers, and belongs to the technical field of spinning in spinning machines.

Background

The acetate fiber slurry is produced into fiber filament bundle in spinning machine comprising metering pump, candle core filter, spinning nozzle and channel. The acetate fiber slurry enters a metering pump through a slurry pipe in the heat preservation box body, the metering pump presses the acetate fiber slurry with accurate metering into a candle core filter for filtering, and then the acetate fiber slurry is conveyed to a spinning cap through a feeding pipe, a plurality of tiny holes with the outer diameter of tens of micrometers are distributed on the spinning cap, and fiber filaments with the required diameter are sprayed through the tiny holes. In order to smoothly throw out the fiber strands, the number, the pore diameter and the spraying direction of the tiny pores need to be strictly matched, otherwise, the fiber strands are entangled together and cannot be formed into filaments. Often, the fit of these parameters requires thousands of experiments to determine.

The number of tiny holes in the current spinning caps is small, the production efficiency is low, and the problem that needs to be solved is how to ensure the spinning quality under the condition of increasing the number of tiny holes.

The spinning cap disclosed in the Chinese patent document CN103276462A comprises a plate-shaped body, wherein a plurality of penetrating spinning holes are formed in the body, the spinning holes are taper holes, three inclined guide parts are formed in the inner sides of the spinning holes, the inclination of the guide parts is gradually reduced from a big port to a small port of the spinning holes, the cross section of the spinning holes along the plane direction of the body is a regular triangle, the small port of the spinning holes is a straight hole, the cross section of the small port along the plane direction of the body is a regular triangle, and the side length of the regular triangle at the small port is 0.02mm to 0.1mm.

The spinning nozzle only solves the problems of complex hole structure, high processing difficulty and the like of the existing spinning nozzle. But does not solve the problem of ensuring the quality of spinning with an increased number of holes in the spinning cap.

Disclosure of Invention

Aiming at the defects of the spinning cap in the existing spinning machine, the invention provides the fiber spinning cap which has high spinning efficiency, stable operation and ensures the spinning quality.

The invention relates to a fiber spinning spinneret cap, which adopts the following technical scheme:

the spinning cap comprises a bottom plate, wherein the bottom plate is provided with penetrating spinning holes; the spinneret hole sequentially comprises a large guide wire cone part, a small guide wire cone part and a straight wire outlet hole, and the large end of the large guide wire cone part is provided with a chamfer part; the cross sections of the large guide wire cone part and the small guide wire cone part are regular triangles, and each side surface is an inclined surface; the oblique angle of each side surface of the large guide wire cone is larger than that of each side surface of the small guide wire cone; the cross section of the straight hole for the filament is in a regular triangle shape, and the three side surfaces are all straight surfaces (the cross section sizes of all the positions are consistent).

The side length of the big end regular triangle of the big cone part of the guide wire is 2-2.5 mm.

The oblique angle of the side surface of the large cone part of the guide wire is 25-30 degrees.

The diameter of the large end of the chamfer part is 1.5-2 mm.

The taper of the chamfer part is 15-20 degrees.

The oblique angle of the side surface of the small cone part of the guide wire is 10-15 degrees.

The side length of the regular triangle section of the straight wire outlet hole is 0.05-0.06 mm.

The height of the straight hole for filament outlet is 0.01-0.04 mm.

The distance between the large end of the small cone part of the guide wire and the bottom surface of the bottom plate is 0.06-0.2 mm.

According to the spinning cap disclosed by the invention, before the straight hole for spinning is spun, three sections of guiding of the chamfer part, the large cone part of the guide wire and the small cone part of the guide wire are adopted, and the sizes and angles of all the parts are matched, so that the spinning solution is emitted according to the set direction, the smooth ejection of the spinning solution is ensured, the spinning efficiency is high, the operation is stable, and the spinning quality is ensured.

Drawings

FIG. 1 is a schematic structural view of the fiber spinning nozzle cap of the present invention.

Fig. 2 is a top view of fig. 1.

FIG. 3 is a top view of a spinneret orifice according to the present invention.

FIG. 4 is a cross-sectional view A-A (cross-sectional view of a spinneret orifice) of FIG. 3.

In the figure: 1. the device comprises a bottom plate, an outer edge, a spinning hole, a straight wire outlet, a small guide wire cone, a chamfer and a large guide wire cone.

Detailed Description

As shown in fig. 1, the fiber spinning nozzle comprises a bottom plate 1, wherein an outer edge 2 is arranged on the periphery of one end of the bottom plate 1, and the bottom plate 1 and the outer edge 2 form a spinning nozzle body. As shown in fig. 2, the base plate 1 is provided with through spinneret holes 3, the spinneret holes 3 are concentrically distributed in the center of the base plate 1, and the spinneret holes 3 on the same circumference are uniformly distributed.

As shown in fig. 3 and 4, the spinneret orifice 3 sequentially includes a large guide wire cone 7, a small guide wire cone 5 and a straight wire outlet 4 from the inner end surface (the end where the outer edge 2 is arranged) of the base plate 1 to the outer end surface, and the large end of the large guide wire cone 7 is provided with a chamfer 6. The cross sections of the large guide wire cone part 7 and the small guide wire cone part 5 (the planes parallel to the end surfaces of the bottom plate 1) are regular triangles, each side surface is an inclined surface, and the inclined angle b of each side surface of the large guide wire cone part 7 is larger than the inclined angle a of each side surface of the small guide wire cone part 5. The three side surfaces of the straight wire outlet hole 4 are all straight surfaces, and the cross section sizes of all the positions are consistent.

Referring to fig. 3, the large end of the large taper portion 7 of the guide wire has a side length L of 2 to 2.5mm and the large end of the chamfer portion 6 has a diameter of 1.5 to 2mm.

Referring to fig. 4, the bevel angle b of the side surface of the large cone portion 7 of the guide wire takes a value of 25-30 degrees. The bevel angle a of the side surface of the small guide wire cone part 5 takes a value of 10-15 degrees. The taper c of the chamfer portion 6 has a value of 15 to 20 degrees. The side length of the regular triangle section of the straight wire outlet hole 4 is 0.05-0.06 mm, and the height h of the straight wire outlet hole 4 is 0.01-0.04 mm. The distance H between the large end of the small guide wire cone part 5 and the outer end surface of the bottom plate 1 is 0.06-0.2 mm.

A large number of experiments prove that the spinning cap ensures smooth ejection of viscous spinning solution, high spinning efficiency and stable operation through three-section guiding of the chamfer part 6, the large guide wire cone part 7 and the small guide wire cone part 5 and the matching of all dimensions and angles before the straight wire outlet hole 4 is used for discharging wires.

Claims

1. A fiber spinning spinneret cap comprises a bottom plate, wherein penetrating spinneret holes are distributed on the bottom plate; the method is characterized in that: the spinneret hole sequentially comprises a large guide wire cone part, a small guide wire cone part and a straight wire outlet hole, and the large end of the large guide wire cone part is provided with a chamfer part; the cross sections of the large guide wire cone part and the small guide wire cone part are regular triangles, and each side surface is an inclined surface; the oblique angle of each side surface of the large guide wire cone is larger than that of each side surface of the small guide wire cone; the cross section of the straight hole for discharging the silk is regular triangle, and the three side surfaces are straight surfaces;

the side length of the big end regular triangle of the big cone part of the guide wire is 2-2.5 mm; the oblique angle of the side surface of the large cone part of the guide wire is 25-30 degrees; the diameter of the large end of the chamfer part is 1.5-2 mm; the taper of the chamfer part is 15-20 degrees; the oblique angle of the side surface of the small cone part of the guide wire is 10-15 degrees; the side length of the regular triangle section of the straight wire outlet hole is 0.05-0.06 mm; the height of the straight hole for discharging the silk is 0.01-0.04 mm; the distance between the large end of the small cone part of the guide wire and the bottom surface of the bottom plate is 0.06-0.2 mm.