An extrusion device for a composite hollow three-dimensional fiber spinning machine

Abstract

This invention discloses an extrusion device for a composite hollow three-dimensional fiber spinning machine, comprising a frame on which a feeding assembly, a conveying assembly, a filtering assembly, an extrusion assembly, and a spinneret are sequentially connected. The spinneret is densely covered with spinneret units, each including an adjacent first through-hole and a second through-hole. This extrusion device for a composite hollow three-dimensional fiber spinning machine can simultaneously convey two different materials via the conveying assembly. After impurities are filtered by the filtering assembly, the two different materials are extruded from the first and second through-holes on the spinneret by the extrusion assembly. This allows the two materials to undergo different shrinkage amounts under simultaneous air cooling, increasing the bulkiness of the final fiber and thus improving its warmth retention. The device also features a compact structure.

Description

Technical Field

[0001] This invention relates to the field of spinning technology, and in particular to an extrusion device for a composite hollow three-dimensional fiber spinning machine. Background Technology

[0002] Due to its excellent heat retention, warmth, comfort, health benefits, processability, and versatility, fiber has become the main material for home furnishings such as quilts and pillows. These characteristics make fiber home furnishings widely used and popular in the market.

[0003] In existing technologies, fibers are typically produced using spinning machines. The production process mainly includes multiple steps such as melt extrusion, metering, filtration, spinning, cooling and molding, oiling, and winding. Because the materials used in the production process are fixed, the final fiber product has limited bulkiness, which affects its heat insulation performance.

[0004] Therefore, it is necessary to improve the extrusion device for composite hollow three-dimensional fiber spinning machines in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects in the prior art and provide an extrusion device for a composite hollow three-dimensional fiber spinning machine that is beneficial to improving the bulkiness of the final product and enhancing its thermal insulation performance.

[0006] To achieve the above technical effects, the technical solution of the present invention is as follows: an extrusion device for a composite hollow three-dimensional fiber spinning machine, comprising a frame, wherein a feeding assembly, a conveying assembly, a filtering assembly, an extrusion assembly and a spinneret are arranged sequentially on the frame;

[0007] The feeding assembly includes an outer material bin and an inner material bin disposed within the outer material bin. The top and bottom of the outer material bin are respectively provided with an outer feed pipe and an outer discharge pipe. The inner material bin is connected to an inner feed pipe and an inner discharge pipe that pass through the top and bottom of the outer material bin, respectively.

[0008] The transmission assembly includes a transmission shell, an inner spiral blade, a heating element, an outer spiral blade, and a drive unit. The transmission shell is provided with an inner transmission inlet communicating with the inner discharge pipe, an outer transmission inlet communicating with the outer discharge pipe, and an inner transmission outlet and an outer transmission outlet, both pointing downwards. The inner cavity of the transmission shell includes a horizontal inner transmission cavity communicating between the inner transmission inlet and the inner transmission outlet, and a horizontal outer transmission cavity communicating between the outer transmission inlet and the outer transmission outlet. The inner transmission cavity is located inside the outer transmission cavity. The drive unit drives the inner spiral blade to rotate within the inner transmission cavity and drives the outer spiral blade to rotate within the outer transmission cavity. The heating element is used to heat and melt the materials in the inner transmission cavity and the outer transmission cavity.

[0009] The filter assembly is detachably disposed between the transmission assembly and the extrusion assembly. The filter assembly includes an inner filter tube and an outer filter tube that are both pointing downwards. The inner filter tube is located inside the outer filter tube. An inner filter element is disposed inside the inner filter tube and an outer filter element is disposed between the inner filter tube and the outer filter tube. The top ends of the inner filter tube and the top ends of the outer filter tube are respectively connected to the inner transmission outlet and the outer transmission outlet.

[0010] The spinneret is horizontally arranged and densely covered with spinneret units. Each spinneret unit includes a first through hole and a second through hole that are adjacent to each other. Both the first through hole and the second through hole extend in the vertical direction. The extrusion assembly is used to extrude the material passing through the inner filter tube and the material passing through the outer filter tube from top to bottom into the first through hole and the second through hole, respectively.

[0011] Preferably, in order to heat the material in the inner and outer transfer chambers, so that the material melts and facilitates transfer, the heating element includes a heating cylinder disposed between the inner and outer spiral blades and coaxial with the inner and outer transfer chambers. The driving unit includes a drive motor and two transmission units distributed along the axial direction of the inner transfer chamber. Each of the two transmission units includes a drive wheel, a driven wheel, and a synchronous belt. The output end of the drive motor is coaxially connected to the drive wheel. The drive wheel is connected to the driven wheel via the synchronous belt. The driven wheels of the two transmission units are respectively connected to the inner and outer spiral blades.

[0012] Preferably, to facilitate the transfer of material from the output end of the transfer shell to the extrusion assembly via the filtering assembly, the output end of the transfer shell is provided with a transition shell. The transition shell includes an inner transition barrel and an outer transition barrel. The end of the inner transition barrel adjacent to the transfer shell and the end of the outer transition barrel adjacent to the transfer shell are both open. The bottom end of the outer transition barrel is fixedly connected to an outer transition pipe, and the bottom end of the inner transition barrel is fixedly connected to an inner transition pipe located inside the outer transition pipe. The inner transition pipe and the outer transition pipe are detachably connected to the inner filter pipe and the outer filter pipe, respectively. The extrusion assembly includes a receiving shell, which includes an inner receiving barrel connected to the bottom of the inner filter pipe and open at the top, and an outer receiving barrel connected to the bottom of the outer filter pipe and open at the top. The inner receiving barrel is located inside the outer receiving barrel.

[0013] Preferably, in order to facilitate easy disassembly and connection between the filter assembly and the transition shell and the receiving shell, the top and bottom ends of the filter assembly are connected to the transition shell and the receiving shell respectively by threaded bolts and nuts.

[0014] Preferably, in order to extrude the material inside the receiving shell onto the spinneret, the extrusion assembly further includes a reciprocating translation unit, an extrusion unit, and a collecting unit connected in sequence. The extrusion unit includes an inner extrusion barrel, an outer extrusion barrel, an inner extrusion plate, and an outer extrusion plate. The inner extrusion barrel is fixed to the inner side of the outer extrusion barrel along the length of both barrels. The circumferential outer edge of the inner extrusion plate is fixedly connected to the circumferential inner wall of the inner extrusion barrel. The outer extrusion plate is sealed and fitted between the inner extrusion barrel and the outer extrusion barrel. The inner extrusion barrel is connected to the inner receiving barrel and an inner inlet check valve is provided between them. The outer extrusion barrel is connected to the outer receiving barrel and an outer inlet check valve is provided between them. The reciprocating translation unit drives the inner extrusion plate and the outer extrusion plate to reciprocate along the length of the inner extrusion barrel.

[0015] Preferably, in order to ensure a continuous material input to the spinneret, two extrusion units are provided and are arranged opposite or opposite to each other along the moving direction of the output end of the reciprocating translation unit.

[0016] Preferably, in order to ensure the molten state of the material during the extrusion process and facilitate the flow of the material, both the inner extrusion plate and the outer extrusion plate are electric heating plates.

[0017] Preferably, to facilitate the collection of two different materials at the same location and their extrusion through the first and second through holes, the collection unit includes a collection shell, an inner collection pipe, and an outer collection pipe. The inner collection pipe is located inside the outer collection pipe. The spinneret is placed on the bottom of the collection shell and forms a first collection cavity and a second collection cavity with the collection shell. The inner collection pipe and the inner collection cavity are sequentially connected between the inner extrusion barrel and the first through hole. The outer collection pipe and the outer collection cavity are sequentially connected between the outer extrusion barrel and the second through hole. The inner collection pipe and the outer collection pipe are respectively connected to an inner collection check valve and an outer collection check valve.

[0018] Preferably, in order to allow the two materials to be discharged from the first through hole and the second through hole respectively, the collecting shell includes an outer collecting barrel and an inner collecting barrel fixed inside the outer collecting barrel. The spinneret includes an upper plate, a connecting block and a lower plate fixedly connected from top to bottom. The upper plate is fixedly covered on the bottom of the inner collecting barrel, and the lower plate is fixedly covered on the bottom of the outer collecting barrel. The second through hole is provided on the lower plate. The upper plate, the connecting block and the lower plate are respectively provided with an upper through hole, a middle through hole and a lower through hole. The upper through hole, the middle through hole and the lower through hole are connected in sequence to form the first through hole.

[0019] Preferably, in order to further improve the bulkiness of the final fiber product, the cross-sections of the first through hole and the second through hole are C-shaped and facing each other.

[0020] In summary, compared with the prior art, the extrusion device for the composite hollow three-dimensional fiber spinning machine of the present invention can simultaneously transport two different materials through the transmission component. After impurities are filtered by the filter component, the two different materials are extruded from the first and second through holes of the spinneret by the extrusion component. This allows the two materials to produce different shrinkage amounts under the simultaneous air cooling effect, which improves the bulkiness of the final fiber and thus improves the warmth retention. The device also has a compact structure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 yes Figure 1 An explosion diagram;

[0023] Figure 3 This is a schematic diagram of the feeding assembly of the present invention;

[0024] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure;

[0025] Figure 5 yes Figure 3 An explosion diagram;

[0026] Figure 6 This is a schematic diagram of the connection structure between the transmission component and the filtering component of the present invention;

[0027] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure;

[0028] Figure 8 yes Figure 6 An explosion diagram;

[0029] Figure 9 This is an exploded schematic diagram of the transmission shell of the present invention;

[0030] Figure 10 This is a schematic diagram of the transition shell structure of the present invention;

[0031] Figure 11 This is a schematic diagram of the structure of the filter component of the present invention;

[0032] Figure 12 yes Figure 11 An explosion diagram;

[0033] Figure 13 This is a schematic diagram of the connection structure between the extrusion assembly and the spinneret of the present invention;

[0034] Figure 14 yes Figure 13 A schematic diagram of the cross-sectional structure;

[0035] Figure 15 yes Figure 13 An explosion diagram;

[0036] Figure 16 This is a schematic diagram of the structure of the collection unit of the present invention;

[0037] Figure 17 This is a schematic diagram of the spinneret structure of the present invention;

[0038] Figure 18 yes Figure 17 An explosion diagram;

[0039] Figure 19 yes Figure 17 A bottom view;

[0040] In the diagram: 1. Frame; 11. Upper horizontal plate; 12. Lower horizontal plate; 13. Support frame; 14. Mounting base; 15. Support leg; 2. Feeding assembly; 21. Outer hopper; 211. Outer feed pipe; 2111. Outer sealing plug; 212. Outer discharge pipe; 2121. Outer discharge valve; 22. Inner hopper; 221. Inner feed pipe; 2211. Inner sealing plug; 222. Inner discharge pipe; 2221. Inner discharge valve; 23. Inner stirring blade; 24. 25. External stirring blade; 25. Rotary unit; 251. Rotary motor; 252. Drive gear; 253. Driven gear; 254. Bearing; 3. Transmission assembly; 31. Transmission shell; 311. Inner cylinder; 3111. Inner transmission inlet; 312. Outer cylinder; 3121. Outer transmission inlet; 313. End plate; 3131. Inner transmission outlet; 3132. Outer transmission outlet; 32. Inner spiral blade; 33. Outer spiral blade; 331. Rotating cylinder; 34. Drive unit; 341. Drive motor; 342. Drive wheel; 343. Driven wheel; 344. Synchronous belt; 345. Bushing; 35. Heating cylinder; 351. Heat-conducting cover; 36. Transition shell; 361. Inner transition barrel; 362. Outer transition barrel; 363. Inner transition tube; 364. Outer transition tube; 37. Rotating shaft; 371. Sealing block; 38. Heating rod; 4. Filter assembly; 41. Inner filter tube; 42. Outer filter tube ; 43. Inner filter element; 44. Outer filter element; 45. Bolt; 46. Nut; 47. Connecting frame; 5. Extrusion assembly; 51. Receiving shell; 511. Inner receiving tank; 512. Outer receiving tank; 513. Inner connecting pipe; 514. Outer connecting pipe; 515. Filter screen; 516. Cover plate; 52. Reciprocating translation unit; 521. Reciprocating motor; 522. Turntable; 523. Protruding shaft; 524. Reciprocating frame; 53. Extrusion unit; 531. Inner extrusion tank; 532. Outer extrusion tank; 533. Inner extrusion plate; 5331. Inner slide bar; 534. Outer extrusion plate; 5341. Outer slide bar; 535. Inner inlet check valve; 536. Outer inlet check valve; 54. Collection unit; 541. Inner collection tank; 542. Outer collection tank; 543. Inner collection pipe; 544. Outer collection pipe; 545. Inner collection check valve; 546. Outer collection check valve; 6. Spinneret; 61. Upper plate; 611. Upper through hole; 62. Connecting block; 621. Middle through hole; 63. Lower plate; 631. Lower through hole; 64. First through hole; 65. Second through hole. Detailed Implementation

[0041] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0042] like Figures 1-19As shown, an extrusion device for a composite hollow three-dimensional fiber spinning machine according to the present invention includes a frame 1, on which a feeding assembly 2, a conveying assembly 3, a filtering assembly 4, an extrusion assembly 5 and a spinneret 6 are arranged in sequence.

[0043] In the extrusion apparatus of the present invention, a frame 1 supports and fixes a feeding assembly 2, a conveying assembly 3, a filtering assembly 4, an extrusion assembly 5, and a spinneret 6. After the feeding assembly 2 supplies the material used for fiber production to the conveying assembly 3, the conveying assembly 3 heats and melts the material. The molten material, after passing through the filtering assembly 4 to filter impurities, enters the extrusion assembly 5. The extrusion assembly 5 extrudes the molten fiber material from below the spinneret 6. An air-cooling device (not shown in the figure) is provided below the spinneret 6. While the molten fiber material is being extruded below the spinneret 6, the air-cooling device blows clean cold air onto the molten fiber material, causing the fiber material to cool and solidify.

[0044] like Figure 1 and Figure 2 As shown, the frame 1 includes a horizontal upper horizontal plate 11 and a horizontal lower horizontal plate 12 directly below the upper horizontal plate 11. A support leg 15 is fixedly installed below the lower horizontal plate 12 to support it. The top surface of the lower horizontal plate 12 is fixedly connected to the bottom surface of the upper horizontal plate 11 through a support frame 13. A mounting base 14 is also fixed above one end of the lower horizontal plate 12. The transmission component 3 is fixed above the upper horizontal plate 11, and the extrusion component 5 is fixedly connected to the mounting base 14.

[0045] like Figures 3-5 As shown, the feeding assembly 2 includes an outer material bin 21 and an inner material bin 22 disposed within the outer material bin 21. The top and bottom of the outer material bin 21 are respectively provided with an outer feed pipe 211 and an outer discharge pipe 212. The inner material bin 22 is connected to an inner feed pipe 221 and an inner discharge pipe 222 that pass through the top and bottom of the outer material bin 21, respectively.

[0046] The present invention fixes the inner material hopper 22 inside the outer material hopper 21, ensuring the compactness of the feeding component 2 structure. The inner material hopper 22 and the outer material hopper 21 facilitate the storage of materials used to produce two types of fibers. The inner feed pipe 221 and the outer feed pipe 211 facilitate the addition of the two types of materials, while the outer discharge pipe 212 and the inner discharge pipe 222 facilitate the discharge of materials into the transmission component 3.

[0047] Specifically, the inner silo 22 and the outer silo 21 have similar structures, both being cylindrical at the top and conical at the bottom. The inner silo 22 and the outer silo 21 are coaxial. The inner discharge pipe 222 of the inner silo 22 is coaxial with the inner silo 22. The inner discharge pipe 222 extends downward and is fixedly inserted through the bottom of the outer silo 21 to achieve a relatively fixed connection between the inner silo 22 and the outer silo 21. The outer discharge pipe 212 is located below the side wall of the lower conical part of the outer silo 21. The inner discharge pipe 222 and the outer discharge pipe 212 are respectively equipped with an inner discharge valve 2221 and an outer discharge valve 2121 to control the discharge of materials in the inner silo 22 and the outer silo 21, respectively.

[0048] The top of the inner feed pipe 221 is threaded with an inner sealing plug 2211, and the top of the outer feed pipe 211 is threaded with an outer sealing plug 2111 to prevent debris from the external production environment from entering the outer hopper 21 and the inner hopper 22. The top of the outer feed pipe 211 is fixed to the top surface of the outer hopper 21 and communicates with the inner cavity of the outer hopper 21. The axis of the outer feed pipe 211 is offset from the axis of the outer hopper 21.

[0049] The inner feed pipe 221 passes through the top walls of the outer hopper 21 and the inner hopper 22 and is rotatable around its own axis. The inner feed pipe 221 and the inner hopper 22 are coaxial. The inner feed pipe 221 is also fixed with an inner stirring plate 23 and an outer stirring plate 24. The inner stirring plate 23 is located inside the inner hopper 22, and the outer stirring plate 24 is located between the outer circumferential edge of the inner hopper 22 and the inner circumferential wall of the outer hopper 21. The feeding assembly 2 also includes a rotating unit 25. The rotating unit 25 drives the inner feed pipe 221 to rotate around its own axis. Thus, after the rotating unit 25 is started, it can drive the inner feed pipe 221 to rotate, so that the inner stirring plate 23 and the outer stirring plate 24 rotate, so that the material in the inner hopper 22 is uniformly mixed and the material in the outer hopper 21 is uniformly mixed.

[0050] Specifically, the rotating unit 25 includes a rotating motor 251, which is positioned downwards and fixed directly above the outer hopper 21. The output end of the rotating motor 251 is coaxially connected to a drive gear 252, which meshes with a driven gear 253. An inner feed pipe 221 is fixedly inserted through the driven gear 253. A bearing 254 is provided between the driven gear 253 and the top of the outer hopper 21. The outer ring of the bearing 254 is fixed to the top of the outer hopper 21, and the inner ring is fixedly connected to the driven gear 253. This allows the rotating motor 251 to start and drive the drive gear 252 to rotate, which in turn acts on the driven gear 253. Under the support of the bearing 254, the inner feed pipe 221 rotates around its own axis, thereby driving the inner stirring blade 23 and the outer stirring blade 24 to rotate in the inner hopper 22 and the outer hopper 21, respectively.

[0051] like Figures 6-10As shown, the transmission assembly 3 includes a transmission shell 31, an inner spiral blade 32, a heating element, an outer spiral blade 33, and a drive unit 34. The transmission shell 31 is provided with an inner transmission inlet 3111 communicating with the inner discharge pipe 222, an outer transmission inlet 3121 communicating with the outer discharge pipe 212, and an inner transmission outlet 3131 and an outer transmission outlet 3132, both pointing downwards. The inner cavity of the transmission shell 31 includes a horizontal inner transmission cavity communicating between the inner transmission inlet 3111 and the inner transmission outlet 3131, and a horizontal outer transmission cavity communicating between the outer transmission inlet 3121 and the outer transmission outlet 3132. The inner transmission cavity is located inside the outer transmission cavity. The drive unit 34 drives the inner spiral blade 32 to rotate in the inner transmission cavity and drives the outer spiral blade 33 to rotate in the outer transmission cavity. The heating element is used to heat and melt the material in the inner transmission cavity and the outer transmission cavity.

[0052] The axial direction of the transmission housing 31 is horizontal, such as Figure 9 As shown, the transmission shell 31 includes an inner cylinder 311 and an outer cylinder 312 with coaxial centerlines. The inner cylinder 311 is located inside the outer cylinder 312. One end of the inner cylinder 311 is fixedly connected to one end of the outer cylinder 312 via an end plate 313 with coaxial centerlines. The inner transmission outlet 3131 is located at the center of the end plate 313, and the outer transmission outlets 3132 are distributed in a ring array with the center of the end plate 313 as the center. The inner transmission inlet 3111 is arranged upward above the other end of the inner cylinder 311 away from the end plate 313 and is aligned with the outer cylinder 312. The inner feed pipe 221 is fixedly connected, and the outer transmission inlet 3121 is set upward above the other end of the outer cylinder 312 away from the end plate 313 and is fixedly connected to the outer feed pipe 211. The inner transmission cavity is formed by the inner cylinder 311 and the end plate 313 and is connected to the inner transmission outlet 3131. The outer transmission cavity is formed by the inner cylinder 311, the outer cylinder 312 and the end plate 313 and is connected to the outer transmission outlet 3132 to ensure the structural compactness of the transmission assembly 3. The inner transmission cavity and the outer transmission cavity are coaxial.

[0053] The heating element includes a heating cylinder 35, the inner wall of which is fixedly connected to the outer edge of the inner cylinder 311. A heat-conducting cover 351 is fixedly connected to the outer edge of the heating cylinder 35. The heat-conducting cover 351 and the inner cylinder 311 enclose a heat-conducting cavity. The heating cylinder 35 is filled in the heat-conducting cavity. The material in the inner transfer cavity is heated from the inside to melt it, and the material in the outer transfer cavity is heated from the outside to melt it, thereby facilitating the transfer of materials.

[0054] The inner spiral blade 32 is fitted with the circumferential inner wall of the inner cylinder 311 with a clearance and is fixedly connected to a rotating shaft 37 along the coaxial center line. The end of the rotating shaft 37 away from the end plate 313 is open. A heating rod 38 is fixed inside the rotating shaft 37. A sealing block 371 is also fixed to the end of the rotating shaft 37 away from the end plate 313 to seal the inner cavity of the rotating shaft 37. The heating rod 38 is preferably an electric heating rod. When the equipment is running, the heating rod 38 can heat the material in the inner transmission cavity from the inside.

[0055] The outer spiral blade 33 is coaxially connected to the rotating cylinder 331. The circumferential inner wall of the rotating cylinder 331 is sealed and fitted with the circumferential outer edge of the heat-conducting cover 351, and the outer spiral blade 33 is sealed and fitted with the circumferential inner wall of the outer cylinder 312.

[0056] To enable material transfer between the inner and outer transfer cavities, the drive unit 34 includes a drive motor 341 and two transmission units distributed along the axial direction of the inner transfer cavity. Each transmission unit includes a drive wheel 342, a driven wheel 343, and a synchronous belt 344. The output end of the drive motor 341 is coaxially connected to the drive wheel 342. The drive wheel 342 is connected to the driven wheel 343 via the synchronous belt 344. The driven wheels 343 of the two transmission units are respectively connected to the inner spiral blade 32 and the outer spiral blade 33.

[0057] More specifically, in the drive unit 34, the drive motor 341 is fixed to the side wall of the outer cylinder 312. Its output end is coaxially fixed through the drive wheels 342 in the two transmission units and connected to a bushing 345. The bushing 345 is fixed above the upper horizontal plate 11. The driven wheels 343 in the two transmission units are coaxially fixedly sleeved on the outside of the rotating shaft 37 and the rotating cylinder 331, respectively. In this way, the drive motor 341 can simultaneously drive the two drive wheels 342 to rotate, and then drive the two driven wheels 343 to rotate through the synchronous belt 344, so that the rotating shaft 37 and the rotating cylinder 331, which are fixedly connected to the driven wheels 343, rotate, thereby driving the inner spiral blade 32 and the outer spiral blade 33 to rotate.

[0058] The output end of the transmission housing 31 is provided with a transition housing 36. The transition housing 36 includes an inner transition barrel 361 and an outer transition barrel 362. The end of the inner transition barrel 361 adjacent to the transmission housing 31 and the end of the outer transition barrel 362 adjacent to the transmission housing 31 are both open. The bottom end of the outer transition barrel 362 is fixedly connected to an outer transition pipe 364, and the bottom end of the inner transition barrel 361 is fixedly connected to an inner transition pipe 363 located inside the outer transition pipe 364.

[0059] The filter assembly 4 is detachably disposed between the transmission assembly 3 and the extrusion assembly 5. The filter assembly 4 includes an inner filter tube 41 and an outer filter tube 42, both pointing downwards. The inner filter tube 41 is located inside the outer filter tube 42. An inner filter element 43 is disposed inside the inner filter tube 41, and an outer filter element 44 is disposed between the inner filter tube 41 and the outer filter tube 42. The top ends of the inner filter tube 41 and the outer filter tube 42 are respectively connected to the inner transmission outlet 3131 and the outer transmission outlet 3132. The inner transition tube 363 and the outer transition tube 364 are detachably connected to the inner filter tube 41 and the outer filter tube 42, respectively.

[0060] Specifically, both the inner transition barrel 361 and the outer transition barrel 362 are fixedly connected to the end plate 313. Through the transition shell 36, the output direction of the material in the inner and outer transmission chambers is changed, so that the material flows downward.

[0061] like Figure 14 As shown, the extrusion assembly 5 includes a receiving shell 51, which includes an inner receiving barrel 511 that communicates with the bottom of the inner filter tube 41 and has an open top, and an outer receiving barrel 512 that communicates with the bottom of the outer filter tube 42 and has an open top. The inner receiving barrel 511 is located inside the outer receiving barrel 512.

[0062] With the above structure, after the two materials pass through the inner and outer transmission chambers of the transmission shell 31, one material enters and passes through the inner transition pipe 363, and then enters the inner filter pipe 41. The inner filter element 43 filters out impurities in the material, allowing the clean fiber production material to enter the inner receiving tank 511. At the same time, the other material enters and passes through the outer transition pipe 364, and then enters the outer filter pipe 42. The outer filter element 44 filters out impurities in the material, allowing the clean fiber production material to enter the outer receiving tank 512.

[0063] like Figure 11 and Figure 12 As shown, the inner filter tube 41 and the outer filter tube 42 are circular tubes with coaxial centerlines. The outer circumferential edge of the inner filter tube 41 is fixedly connected to the inner circumferential wall of the outer filter tube 42 through a connecting bracket 47. Both the inner filter element 43 and the outer filter element 44 are cylindrical filter screens, and the outer diameter of the inner filter element 43 is smaller than the inner diameter of the inner filter tube 41, while the outer diameter of the outer filter element 44 is smaller than the inner diameter of the outer filter tube 42. The top circumferential outer edge of the inner filter element 43 is provided with an inner connecting ring that is fixedly connected to the inner circumferential wall of the inner filter tube 41, and the top circumferential outer edge of the outer filter element 44 is provided with an outer connecting ring that is fixedly connected to the inner circumferential wall of the inner filter tube 41. The outer connecting ring is fixedly connected to the inner wall of the filter tube 42 around the circumference. This creates a certain gap between the inner filter element 43 and the inner wall of the inner filter tube 41 around the circumference, facilitating the passage of materials. The inner filter element 43 can also accommodate a certain amount of impurities. Similarly, there is a certain gap between the outer filter element 44 and the inner wall of the outer filter tube 42 around the circumference, facilitating the passage of another type of material. The outer filter element 44 can also accommodate a certain amount of impurities. This reduces the cycle of disassembly, cleaning, and installation of the filter assembly 4, reduces the workload of workers, and also increases the structural compactness of the filter assembly 4.

[0064] To ensure a detachable connection between the filter assembly 4 and the transition shell 36 and the receiving shell 51, the outer edge of the bottom circumferential edge of the outer transition tube 364 and the outer wall of the top circumferential edge of the outer receiving barrel 512 are respectively provided with a first outer flange and a fourth outer flange, and the outer edge of the top and bottom circumferential edges of the outer filter tube 42 are respectively provided with a second outer flange and a third outer flange. The first outer flange and the second outer flange, as well as the third outer flange and the fourth outer flange, are fixedly connected by threaded bolts 45 and nuts 46.

[0065] like Figures 13-16 As shown, the extrusion assembly 5 also includes a reciprocating translation unit 52, an extrusion unit 53, and a collecting unit 54 connected in sequence. The extrusion unit 53 includes an inner extrusion barrel 531, an outer extrusion barrel 532, an inner extrusion plate 533, and an outer extrusion plate 534. The inner extrusion barrel 531 is fixed to the inner side of the outer extrusion barrel 532 along their lengths. The outer circumferential edge of the inner extrusion plate 533 is fixedly connected to the inner circumferential wall of the inner extrusion barrel 531. The outer extrusion plate 534 is sealed and fitted between the inner extrusion barrel 531 and the outer extrusion barrel 532. The inner extrusion barrel 531 is connected to the inner receiving barrel 511, and an inner inlet check valve 535 is provided between them. The outer extrusion barrel 532 is connected to the outer receiving barrel 512, and an outer inlet check valve 535 is provided between them. 6. The reciprocating translation unit 52 drives the inner extrusion plate 533 and the outer extrusion plate 534 to reciprocate along the length of the inner extrusion barrel 531; the collecting unit 54 includes a collecting shell, an inner collecting pipe 543 and an outer collecting pipe 544. The inner collecting pipe 543 is located inside the outer collecting pipe 544. The spinneret 6 is installed on the bottom of the collecting shell and forms a first collecting cavity and a second collecting cavity with the collecting shell. The inner collecting pipe 543 and the inner collecting cavity are sequentially connected between the inner extrusion barrel 531 and the first through hole 64. The outer collecting pipe 544 and the outer collecting cavity are sequentially connected between the outer extrusion barrel 532 and the second through hole 65. The inner collecting pipe 543 and the outer collecting pipe 544 are respectively connected to an inner collecting check valve 545 and an outer collecting check valve 546.

[0066] The above design increases the compactness of the extrusion assembly 5. In the extrusion assembly 5, the inner receiving tank 511 is fixedly connected to the inner extrusion tank 531 through the inner connecting pipe 513, and the outer receiving tank 512 is fixedly connected to the outer extrusion tank 532 through the outer connecting pipe 514. The inner inlet check valve 535 and the outer inlet check valve 536 are respectively installed on the inner connecting pipe 513 and the outer connecting pipe 514 to restrict the flow direction of the material in the inner connecting pipe 513 and the outer connecting pipe 514, so that the material in the inner receiving tank 511 can enter the inner extrusion tank 531 through the inner connecting pipe 513, and the material in the outer receiving tank 512 can enter the outer extrusion tank 532 through the outer connecting pipe 514. The outer extrusion tank 532 is horizontally fixed above the mounting base 14. Similarly, the inner collecting check valve 545 and the outer collecting check valve 546 restrict the flow direction of the material, so that the material in the inner extrusion tank 531 and the outer extrusion tank 532 can enter the collecting unit 54.

[0067] In this invention, two extrusion units 53 are provided and are arranged opposite to each other along the moving direction of the output end of the reciprocating translation unit 52; both the inner extrusion plate 533 and the outer extrusion plate 534 are electric heating plates.

[0068] Specifically, the reciprocating translation unit 52 is positioned between the two extrusion units 53, which are arranged opposite to each other. This ensures that when the output end of the reciprocating translation unit 52 moves in either direction, one extrusion unit 53 receives material from the receiving shell 51, while the other extrusion unit 53 can extrude material into the collecting unit 54. Both the inner extrusion plate 533 and the outer extrusion plate 534 are electric heating plates, which can heat and keep the material in the inner extrusion barrel 531 and the outer extrusion barrel 532 warm, preventing the material fibers from cooling and solidifying during long-term flow. The heating and heat preservation keep the material in a molten state, facilitating the flow of the material.

[0069] Specifically, the reciprocating translation unit 52 includes a reciprocating motor 521 fixed below the receiving shell 51 and pointing downwards, a turntable 522 with its coaxial center line fixed to the bottom end of the output shaft of the reciprocating motor 521, a convex shaft 523 fixed to the bottom surface of the turntable 522 and extending downwards at the edge of the turntable 522, and a reciprocating frame 524 sleeved on the convex shaft 523. The length direction of the reciprocating frame 524 is consistent with the axial direction of the transmission shell 31, and the convex shaft 523 is attached between the two inner sidewalls of the frame opening of the reciprocating frame 524. The inner extrusion plate 533 and the outer extrusion plate 534 are respectively connected to the inner slide rod 5331 and the outer slide rod 5341. The adjacent ends of the inner extrusion barrel 531 and the outer extrusion barrel 532 are fixedly connected by the cover plate 516. The inner slide rod 5331 and the outer slide rod 5341 slide through the cover plate 516 and are fixedly connected to the reciprocating frame 524.

[0070] Thus, when the reciprocating motor 521 drives the turntable 522 to rotate, the cam shaft 523 rotates around the axis of the turntable 522, acting on the reciprocating frame 524. This causes the reciprocating frame 524 to simultaneously drive the inner extrusion plate 533 and the outer extrusion plate 534 on the same side to move at the same speed and in the same direction through the inner slide rod 5331 and the outer slide rod 5341, thereby driving the material to flow in and out of the inner extrusion barrel 531 and the outer extrusion barrel 532.

[0071] The cover plate 516 is provided with a vent hole, which is connected to the inner cavity of the inner extrusion barrel 531 and the outer extrusion barrel 532. A filter screen 515 is provided in the vent hole to ensure air flow while preventing external dust and impurities from entering the inner extrusion barrel 531 and the outer extrusion barrel 532.

[0072] like Figures 14-19As shown, the spinneret 6 is horizontally arranged, and the spinneret 6 is densely covered with spinneret units. Each spinneret unit includes a first through hole 64 and a second through hole 65 adjacent to each other. Both the first through hole 64 and the second through hole 65 extend in the vertical direction. The extrusion assembly 5 is used to extrude the material passing through the inner filter tube 41 and the material passing through the outer filter tube 42 from top to bottom into the first through hole 64 and the second through hole 65, respectively. The collecting shell includes an outer collecting tank 542 and an inner collecting tank 541 fixed inside the outer collecting tank 542. The spinneret 6 includes spinnerets from... The upper plate 61, the connecting block 62, and the lower plate 63 are fixedly connected from top to bottom. The upper plate 61 is fixedly covered at the bottom of the inner collecting tank 541, and the lower plate 63 is fixedly covered at the bottom of the outer collecting tank 542. The second through hole 65 is provided on the lower plate 63. The upper plate 61, the connecting block 62, and the lower plate 63 are respectively provided with an upper through hole 611, a middle through hole 621, and a lower through hole 631. The upper through hole 611, the middle through hole 621, and the lower through hole 631 are connected in sequence to form the first through hole 64.

[0073] Under the action of the reciprocating translation unit 52, the material in the inner extrusion barrel 531 enters the inner collection barrel 541 through the inner collection pipe 543, and then flows out sequentially through the upper through hole 611 of the upper plate 61, the middle through hole 621 of the connecting block 62, and the lower through hole 631 of the lower plate 63, that is, through the first through hole 64. The material in the outer extrusion barrel 532 enters the outer collection barrel 542 through the outer collection pipe 544, and then flows out directly from the second through hole 65 on the lower plate 63. Finally, the extrusion device simultaneously extrudes multiple pairs of fibers of different materials. A cooling device can be installed below the spinneret 6 to blow cold air on the two pairs of fibers of different materials, so that the two types of fibers solidify and shrink when cooled, and produce different shrinkage amounts. Then, the two types of fibers are collected to obtain composite central control three-dimensional fiber filaments.

[0074] A further improvement is that the cross-sections of the first through-hole 64 and the second through-hole 65 are C-shaped and facing each other. This design further increases the shrinkage of the fibers in their molten states upon cooling, allowing them to be wound together into a more fluffy fiber filament, ensuring the fluffiness of the composite fiber and enhancing the warmth retention of home furnishings made from this composite fiber.

[0075] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An extrusion device for a composite hollow three-dimensional fiber spinning machine, comprising a frame, wherein a feeding assembly, a conveying assembly, a filtering assembly, an extrusion assembly, and a spinneret are sequentially connected on the frame, characterized in that: The feeding assembly includes an outer material bin and an inner material bin disposed within the outer material bin. The top and bottom of the outer material bin are respectively provided with an outer feed pipe and an outer discharge pipe. The inner material bin is connected to an inner feed pipe and an inner discharge pipe that pass through the top and bottom of the outer material bin, respectively. The transmission assembly includes a transmission shell, an inner spiral blade, a heating element, an outer spiral blade, and a drive unit. The transmission shell is provided with an inner transmission inlet communicating with the inner discharge pipe, an outer transmission inlet communicating with the outer discharge pipe, and an inner transmission outlet and an outer transmission outlet, both pointing downwards. The inner cavity of the transmission shell includes a horizontal inner transmission cavity communicating between the inner transmission inlet and the inner transmission outlet, and a horizontal outer transmission cavity communicating between the outer transmission inlet and the outer transmission outlet. The inner transmission cavity is located inside the outer transmission cavity. The drive unit drives the inner spiral blade to rotate within the inner transmission cavity and drives the outer spiral blade to rotate within the outer transmission cavity. The heating element is used to heat and melt the materials in the inner transmission cavity and the outer transmission cavity. The filter assembly is detachably disposed between the transmission assembly and the extrusion assembly. The filter assembly includes an inner filter tube and an outer filter tube that are both pointing downwards. The inner filter tube is located inside the outer filter tube. An inner filter element is disposed inside the inner filter tube and an outer filter element is disposed between the inner filter tube and the outer filter tube. The top ends of the inner filter tube and the top ends of the outer filter tube are respectively connected to the inner transmission outlet and the outer transmission outlet. The spinneret is horizontally arranged and densely covered with spinneret units. Each spinneret unit includes a first through hole and a second through hole that are adjacent to each other. Both the first through hole and the second through hole extend in the vertical direction. The extrusion assembly is used to extrude the material passing through the inner filter tube and the material passing through the outer filter tube from top to bottom into the first through hole and the second through hole, respectively.

2. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 1, characterized in that: The heating element includes a heating cylinder disposed between the inner spiral blade and the outer spiral blade and coaxial with the inner and outer transmission cavities. The driving unit includes a driving motor and two transmission units distributed along the axial direction of the inner transmission cavity. Each of the two transmission units includes a driving wheel, a driven wheel, and a synchronous belt. The output end of the driving motor is coaxially connected to the driving wheel. The driving wheel is connected to the driven wheel via the synchronous belt. The driven wheels of the two transmission units are respectively connected to the inner spiral blade and the outer spiral blade.

3. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 2, characterized in that: The output end of the transmission shell is provided with a transition shell, which includes an inner transition barrel and an outer transition barrel. The end of the inner transition barrel adjacent to the transmission shell and the end of the outer transition barrel adjacent to the transmission shell are both open. The bottom end of the outer transition barrel is fixedly connected to an outer transition pipe, and the bottom end of the inner transition barrel is fixedly connected to an inner transition pipe located inside the outer transition pipe. The inner transition pipe and the outer transition pipe are detachably connected to the inner filter pipe and the outer filter pipe, respectively. The extrusion assembly includes a receiving shell, which includes an inner receiving barrel connected to the bottom of the inner filter pipe and open at the top, and an outer receiving barrel connected to the bottom of the outer filter pipe and open at the top. The inner receiving barrel is located inside the outer receiving barrel.

4. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 3, characterized in that: The top and bottom of the filter assembly are connected to the transition shell and the receiving shell respectively by threaded bolts and nuts.

5. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 3, characterized in that: The extrusion assembly further includes a reciprocating translation unit, an extrusion unit, and a collecting unit connected in sequence. The extrusion unit includes an inner extrusion barrel, an outer extrusion barrel, an inner extrusion plate, and an outer extrusion plate. The inner extrusion barrel is fixed to the inner side of the outer extrusion barrel along the length of both barrels. The circumferential outer edge of the inner extrusion plate is fixedly connected to the circumferential inner wall of the inner extrusion barrel. The outer extrusion plate is sealed and fitted between the inner and outer extrusion barrels. The inner extrusion barrel is connected to the inner receiving barrel, and an inner inlet check valve is provided between them. The outer extrusion barrel is connected to the outer receiving barrel, and an outer inlet check valve is provided between them. The reciprocating translation unit drives the inner extrusion plate and the outer extrusion plate to reciprocate along the length of the inner extrusion barrel.

6. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 5, characterized in that: The extrusion unit is provided in two parts and is arranged opposite or opposite to each other along the moving direction of the output end of the reciprocating translation unit.

7. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 5, characterized in that: Both the inner extrusion plate and the outer extrusion plate are electric heating plates.

8. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 5, characterized in that: The collection unit includes a collection shell, an inner collection pipe, and an outer collection pipe. The inner collection pipe is located inside the outer collection pipe. The spinneret is installed at the bottom of the collection shell and forms a first collection cavity and a second collection cavity with the collection shell. The inner collection pipe and the inner collection cavity are sequentially connected between the inner extrusion barrel and the first through hole. The outer collection pipe and the outer collection cavity are sequentially connected between the outer extrusion barrel and the second through hole. The inner collection pipe and the outer collection pipe are respectively connected to an inner collection check valve and an outer collection check valve.

9. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 8, characterized in that: The collecting shell includes an outer collecting barrel and an inner collecting barrel fixed inside the outer collecting barrel. The spinneret includes an upper plate, a connecting block, and a lower plate fixedly connected from top to bottom. The upper plate is fixedly covered at the bottom of the inner collecting barrel, and the lower plate is fixedly covered at the bottom of the outer collecting barrel. The second through hole is provided on the lower plate. The upper plate, the connecting block, and the lower plate are respectively provided with an upper through hole, a middle through hole, and a lower through hole. The upper through hole, the middle through hole, and the lower through hole are sequentially connected to form the first through hole.

10. The extrusion device for a composite hollow three-dimensional fiber spinning machine according to claim 9, characterized in that: The cross-sections of the first through hole and the second through hole are C-shaped and facing each other.

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