Novel sheath-core composite spinning assembly

Abstract

The utility model discloses a novel skin-core composite spinning assembly which comprises a sand cup plate, a first distribution plate provided with a first cavity and a second cavity, a core layer component distribution plate provided with a first distribution hole and a second distribution hole, a skin layer component distribution plate provided with a third distribution hole and a fourth distribution hole, and a spinneret plate provided with a converging groove. A plurality of spinneret orifices are formed in the bottom of the converging groove, and the melt in the first cavity forms a core layer component melt A through the distribution hole II; the melt in the second cavity directly penetrates through the core layer component distribution plate through the distribution hole I and enters the distribution hole III to form a skin layer component melt B, the core layer component melt A is directly sprayed to one part of the spinneret orifices through the distribution hole IV, and the skin layer component melt B enters the converging groove through the distribution hole III and then is sprayed through the other part of the spinneret orifices. The problems of yellowing, curing and the like caused by long retention time and thermal degradation of high polymer melt in the runner can be solved, and quicker filamentation is facilitated, so that the time is further shortened, and the effects of reducing the cost and improving the efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of textile chemical fiber, specifically relates to a novel skin-core composite spinning assembly. BACKGROUND

[0002] The skin-core composite fiber is the fiber with special cross section shape which is formed by two kinds of polymers with different properties or structures through the skin layer jetting channel and the core layer jetting channel, and the fiber is continuously formed by one component surrounding another component along the fiber axis, and the fiber is formed at the end of the jetting hole of the jetting plate. The two have an interface, and only one component has an external boundary. The composite spinning assembly is responsible for the main melt spinning function, and plays the role of filtering, distributing the melt, making the melt fully mixed and uniformly distributed to each jetting hole of the jetting plate.

[0003] The existing spinning assembly has the problems of multiple distribution plate levels, multiple flow channels, slow melt flow rate in the spinning process, and long waiting time after pouring the material before the chemical fiber is sprayed at the bottom end of the jetting plate. Therefore, it is necessary to design a new assembly structure to improve it. SUMMARY

[0004] In order to solve the technical problems existing in the prior art, the purpose of the present application is to provide a novel skin-core composite spinning assembly, which can solve the problems of long residence time of high polymer melt in the flow channel, yellowing caused by thermal degradation, solidification and the like, and is beneficial to faster spinning, thereby further shortening the time and achieving the effect of reducing cost and increasing efficiency.

[0005] In order to solve the above technical problems, the present application adopts the following technical scheme:

[0006] A novel skin-core composite spinning assembly, comprising a sand cup plate, a distribution plate one, a core component distribution plate, a skin component distribution plate and a jetting plate which are connected in sequence from top to bottom, the sand cup plate is provided with a first sand cup and a second sand cup which are symmetrically arranged, the lower end of the first sand cup and the second sand cup is provided with a sand cup hole, the distribution plate one is provided with an asymmetric first cavity and a second cavity, the core component distribution plate is provided with a distribution hole one and a distribution hole two, the skin component distribution plate is provided with a distribution hole three and a distribution hole four, the upper surface of the jetting plate is provided with a converging groove, the bottom of the converging groove is provided with a plurality of jetting holes, the melt in the first cavity forms core component melt A through the distribution hole two, the core component melt A is directly jetted to a part of the jetting holes through the distribution hole four; the melt in the second cavity directly passes through the core component distribution plate into the distribution hole three to form skin component melt B through the distribution hole one, and the skin component melt B is jetted through another part of the jetting holes after entering the converging groove through the distribution hole three.

[0007] Preferably, the first cavity and the second cavity are respectively provided with a first feeding port and a second feeding port, the first feeding port is in communication with the distribution hole one, and the second feeding port is in communication with the distribution hole two.

[0008] Preferably, a strip-shaped flow guide groove is arranged in the bottom surface of the distribution plate one, and the distribution plate two is provided with at least two distribution holes one in communication with the strip-shaped flow guide groove.

[0009] Preferably, the distribution plate two is provided with two second-order flow guide grooves in communication with the first feeding port, each of the second-order flow guide grooves extends to multiple-order flow guide grooves in two directions, and the distribution hole two is arranged at the bottom of the second-order flow guide groove.

[0010] Preferably, the distribution plate three is provided with four groups of multiple-order annular flow guide grooves in communication with the distribution hole one, and the distribution hole four is arranged at the bottom of the multiple-order annular flow guide groove.

[0011] Preferably, each group of the multiple-order annular flow guide grooves is coaxially arranged, and the lengths of the multiple-order annular flow guide grooves are sequentially shortened from outside to inside.

[0012] Preferably, the multiple-order annular flow guide grooves and the distribution hole four are staggered, and the bottom outlet of the distribution hole four is further provided with a boss corresponding to the spinning hole.

[0013] Preferably, the distribution plate two is provided with two second-order flow guide grooves in communication with the first feeding port, each of the second-order flow guide grooves extends to multiple-order flow guide grooves in two directions, and the distribution hole two is arranged at the bottom of the second-order flow guide groove.

[0014] Preferably, the distribution plate three is provided with four groups of multiple-order annular flow guide grooves in communication with the distribution hole one, and the distribution hole four is arranged at the bottom of the multiple-order annular flow guide groove, and the bottom outlet of the distribution hole four is further provided with a boss corresponding to the spinning hole.

[0015] Preferably, each group of the multiple-order annular flow guide grooves is coaxially arranged, and the lengths of the multiple-order annular flow guide grooves are sequentially shortened from outside to inside; and the multiple-order annular flow guide grooves and the distribution hole four are staggered.

[0016] Preferably, the top surfaces of the sand cup plate, the distribution plate one and the spinning plate are all separated by a partition plate.

[0017] Preferably, the distribution plate one and the distribution plate two respectively uniformly distribute the core component melt A and the skin component melt B.

[0018] Preferably, the diameter of the outlet of the distribution hole four is smaller than the diameter of the inlet of the spinning hole, and the spinning hole is a conical hole.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] By reducing the number of plates and overall volume of the spinning assembly, the two-component melt can be distributed more quickly to each distribution hole, alleviating problems such as the polymer melt's long residence time in the flow channel, yellowing, and solidification caused by thermal degradation. This is conducive to faster yarn formation, thereby further shortening the time and achieving the effect of reducing costs and increasing efficiency. At the same time, the simplified sheath component channel provides greater space for the core layer material distribution process and more uniform pressure distribution, thereby improving the cross-sectional morphology and fiber properties of the chemical fiber yarn. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Fig. 1 This is an exploded view of the utility model;

[0022] Fig. 2 This is a structural view of the upper end of the distribution plate 1 in the present invention, showing the relative position of the second feed port;

[0023] Fig. 3 This is a bottom structural view of the distribution plate 1 in the present invention, showing the relative position structure of the strip guide groove and the bottom of the first feed port;

[0024] Fig. 4 This is a schematic diagram of the bottom structure of the core layer component distribution plate of the utility model;

[0025] Fig. 5 This is a schematic diagram of the bottom structure of the cortical component distribution plate of the present invention;

[0026] Fig. 6 This is a schematic diagram of the bottom structure of the spinneret in the present invention;

[0027] In the figure: 1. Sand cup plate; 2. Distribution plate 1; 3. Core layer component distribution plate; 4. Skin layer component distribution plate; 5. Spinneret; 6. First sand cup; 7. Second sand cup; 8. Sand cup hole; 9. First cavity; 10. First feed port; 11. Second cavity; 12. Second feed port; 13. Strip guide groove; 14. Second-order guide groove; 15. Distribution hole 2; 16. Distribution hole 1; 17. Multi-order annular guide groove; 18. Distribution hole 3; 19. Distribution hole 4; 20. Boss; 21. Inlet groove; 22. Spinneret hole. DETAILED DESCRIPTION

[0028] Below, the present application is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this application, it should be understood that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0030] The terms "first," "second," and the like in this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0031] like Figs. 1-3 as well as Fig. 6 As shown, a novel skin-core composite spinning assembly comprises a sand cup plate 1, a distribution plate 2, a core component distribution plate 3, a skin component distribution plate 4 and a spinneret 5 which are tightly connected in sequence from top to bottom. The sand cup plate 1 is symmetrically provided with a first sand cup 6 and a second sand cup 7. The lower ends of the first sand cup 6 and the second sand cup 7 are both provided with a sand cup hole 8. The distribution plate 2 is provided with an asymmetric first cavity 9 and a second cavity 11. The core component distribution plate 3 is provided with a distribution hole 16 and a distribution hole 2 15. The skin component distribution plate 4 is provided with a distribution hole 3 18 and a distribution hole 4 19. The spinneret 5 is provided with a The surface is provided with an inlet groove 21, and the bottom of the inlet groove 21 is provided with a plurality of spinnerets 22. The melt in the first cavity 9 forms a core layer component melt A through the distribution hole 2 15, and the core layer component melt A is then directly spun to a part of the spinnerets 22 through the distribution hole 4 19; the melt in the second cavity 11 passes through the distribution hole 16 directly through the core layer component distribution plate 3 into the distribution hole 3 18 to form a skin component melt B. After the skin component melt B enters the inlet groove 21 through the distribution hole 3 18, it is spun through another part of the spinnerets 22.

[0032] The sand cup plate 1, the distribution plate 2, the core component distribution plate 3, the skin component distribution plate 4 and the spinneret plate 5 are penetrated by a pair of positioning bolts at the center of the plate surface and the edge, and are tightly connected from top to bottom. In the actual production process, the melt A flows into the first cavity 9 through the sand cup hole 8 at the bottom of the first sand cup 6, and then flows downward into the second-stage flow guide groove 14 through the first feeding port 10. After flowing through the second-stage flow guide groove 14 to the multi-stage flow guide grooves on both sides, the core component melt A flows downward along the distribution hole two 15 to form the first fiber. The melt B flows into the second cavity 11 through the sand cup hole 8 at the bottom of the second sand cup 7, and then flows downward into the strip-shaped flow guide groove 13 through the second feeding port 12. After being divided again into the distribution hole one 16 through the strip-shaped flow guide groove 13, the skin component melt B is directly injected into the multi-stage annular flow guide groove 17 through the distribution hole one 16, and then is uniformly distributed through the multi-stage annular flow guide groove 17. After flowing into the sink groove 21 along the distribution hole three 18, the second fiber is finally sprayed out through the other part of the spinneret hole 22. In the process of guiding the core component melt A and the skin component melt B through the skin-core composite spinning assembly, the number of spinning assembly plates and the overall volume are reduced, the bicomponent melt can be distributed into each distribution hole more quickly, the problems of yellowing and solidification caused by long residence time of the polymer melt in the flow channel are reduced, which is beneficial to faster spinning, thereby further shortening the time, achieving the effect of reducing cost and increasing efficiency. At the same time, the skin component channel is simplified, the structure is simpler, the volume of the spinning assembly is reduced, the core material distribution process has more space to play and more uniform pressure configuration, thereby achieving the effects of convenient assembly of the assembly, saving raw materials, improving spinning efficiency, improving the cross-sectional morphology of the chemical fiber and the fiber performance in actual spinning production.

[0033] Further improvement is shown in Fig. 4 The first feeding port 10 is in communication with the distribution hole two 15, and the second feeding port 12 is in communication with the distribution hole one 16. The strip-shaped flow guide groove 13 is arranged in the bottom surface of the distribution plate one 2, and the core component distribution plate 3 is provided with at least two distribution hole ones 16 in communication with the strip-shaped flow guide groove 13.

[0034] The melt in the first cavity 9 and the second cavity 11 can be better transported to the distribution hole two 15 and the distribution hole one 16 through the first feeding port 10 and the second feeding port 12, especially the bottom surface of the distribution plate one 2 is internally provided with two strip-shaped flow guide grooves 13 in communication with the two second feeding ports 12, and the core component distribution plate 3 is provided with four distribution hole ones 16 in communication with the two strip-shaped flow guide grooves 13, when the melt of the second feeding port 12 flows downward, the flow direction can be changed through the strip-shaped flow guide groove 13, so that the melt flows into the distribution hole three 18 through the four distribution hole ones 16, and the melt is prevented from staying in the assembly for a long time.

[0035] Further improved, the core component distribution plate 3 is provided with two second-order flow guide grooves 14 in communication with the first feeding port 10, each of the second-order flow guide grooves 14 extends to multiple orders of flow guide grooves in two directions, and the distribution hole two 15 is arranged at the bottom of the second-order flow guide groove 14.

[0036] When the melt A enters the core component distribution plate 3, the melt can be more evenly distributed on the core component distribution plate 3 through the second-order flow guide groove 14, so that the number of distribution hole two 15 is more, the flow effect is faster, and the adverse effects caused by the melt staying in the assembly for a long time are avoided.

[0037] Further improved, as shown in the figure, Fig. 5 The upper surface of the skin component distribution plate 4 is provided with four groups of multi-order annular flow guide grooves 17 in communication with the respective distribution hole one 16, the distribution hole three 18 is arranged at the bottom of the multi-order annular flow guide groove 17, the multi-order annular flow guide groove 17 and the distribution hole four 19 are staggered, and the bottom outlet of the distribution hole four 19 is further provided with a boss 20 corresponding to the spinneret hole 22.

[0038] When the melt flows into the skin component distribution plate 4 through the distribution hole one, is divided in the four multi-order annular flow guide grooves 17, and finally flows out downward through the distribution hole three 18, the melt flow effect is faster, and the adverse effects caused by the melt staying in the assembly for a long time are avoided. The melt injected directly into the spinneret hole 22 through the distribution hole four 19 can flow into the converging groove 21, then pass through the boss 20 at the bottom outlet of the distribution hole four 19 to the spinneret hole 22 to form a filament, and the mixing of the two different melts is avoided. Each group of multi-order annular flow guide grooves 17 is coaxially arranged, and the length is shortened from outside to inside; the multi-order annular flow guide grooves 17 and the distribution hole four 19 are staggered, so that the distribution of the distribution hole three and the distribution hole four is more uniform and comprehensive.

[0039] Further improved, the upper surfaces of the sand cup plate 1, the distribution plate one 2 and the spinneret plate 5 are all separated by a partition plate, and the sealing property can be improved through the partition plate.

[0040] Further improved, the core component distribution plate 3 and the skin component distribution plate 4 respectively uniformly distribute the core component melt A and the skin component melt B; the discharge port diameter of the distribution hole 19 is smaller than the feed port diameter of the spinneret hole 22, and the spinneret hole 22 is a tapered hole; which can make the two fibers more uniform, and the melt overflow does not occur.

[0041] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A novel sheath-core composite spinning assembly, characterized by: The invention comprises a sand cup plate (1), a distribution plate (2), a core component distribution plate (3), a skin component distribution plate (4) and a spinneret (5) which are tightly connected in sequence from top to bottom. The sand cup plate (1) is symmetrically provided with a first sand cup (6) and a second sand cup (7). The lower ends of the first sand cup (6) and the second sand cup (7) are both provided with a sand cup hole (8). The distribution plate (2) is provided with an asymmetrical first cavity (9) and a second cavity (11). The core component distribution plate (3) is provided with a distribution hole (16) and a distribution hole (15). The skin component distribution plate (4) is provided with a distribution hole (18) and a distribution hole (19). The spinneret (5) has a surface The surface is provided with a confluence groove (21), and the bottom of the confluence groove (21) is provided with a plurality of spinnerets (22). The melt in the first cavity (9) forms a core component melt A through the distribution hole two (15), and the core component melt A is then directly spun to a part of the spinnerets (22) through the distribution hole four (19); the melt in the second cavity (11) passes through the distribution hole one (16) directly through the core component distribution plate (3) and enters the distribution hole three (18) to form a skin component melt B. After the skin component melt B enters the confluence groove (21) through the distribution hole three (18), it is spun through another part of the spinnerets (22).

2. The novel sheath-core composite spinning assembly according to claim 1, characterized in that: The first cavity (9) and the second cavity (11) are respectively provided with a first feed port (10) and a second feed port (12), wherein the first feed port (10) is connected to the second distribution hole (15), and the second feed port (12) is connected to the first distribution hole (16).

3. The novel sheath-core composite spinning assembly according to claim 2, characterized in that: A strip-shaped guide groove (13) is provided inside the bottom surface of the distribution plate (2), and at least two distribution holes (16) are provided on the core layer component distribution plate (3) and are connected to the strip-shaped guide groove (13).

4. The novel sheath-core composite spinning assembly according to claim 2, characterized in that: The core layer component distribution plate (3) is provided with two second-order guide grooves (14) connected to the first feed port (10), each of the second-order guide grooves (14) extends in two directions to form a multi-order guide groove, and the second distribution hole (15) is provided at the bottom of the second-order guide groove (14).

5. The novel sheath-core composite spinning assembly according to claim 4, characterized in that: The upper surface of the cortical component distribution plate (4) is provided with four groups of multi-stage annular guide grooves (17) connected to each of the distribution holes (16), and the distribution hole (18) is provided at the bottom of the multi-stage annular guide grooves (17).

6. The novel sheath-core composite spinning assembly according to claim 5, characterized in that: Each group of the multi-stage annular guide grooves (17) are coaxially arranged, and their lengths are shortened from the outside to the inside.

7. The novel sheath-core composite spinning assembly according to claim 6, characterized in that: The multi-stage annular guide groove (17) and the distribution hole four (19) are arranged in an interlaced manner, and the bottom outlet of the distribution hole four (19) is also provided with a boss (20) corresponding to the spinneret hole (22).

8. The novel sheath-core composite spinning assembly according to claim 1, characterized in that: The middle of the upper surfaces of the sand cup plate (1), the distribution plate (2) and the spinneret (5) are separated by a partition.

9. The novel sheath-core composite spinning assembly according to claim 1, characterized in that: The core layer component distribution plate (3) and the skin layer component distribution plate (4) respectively evenly distribute the core layer component melt A and the skin layer component melt B.

10. The novel sheath-core composite spinning assembly according to claim 1, characterized in that: The diameter of the discharge port of the distribution hole four (19) is smaller than the diameter of the feed port of the spinneret hole (22), and the spinneret hole (22) is a tapered hole.

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