CN210194043U - Three-component parallel composite fiber spinning assembly - Google Patents

Abstract

A three-component parallel composite fiber spinning assembly belongs to the field of composite spinning equipment. Comprises a cylinder body; a spinneret plate, a melt distribution disc, a melt guide disc, a melt filtering mechanism and a melt guide disc which are arranged in the cylinder cavity from bottom to top; the locking nut ring is matched with the upper part of the cavity wall of the cylinder cavity, and has the characteristics that: the spinneret plate is supported at the lower part of the barrel cavity, a spinneret plate composite melt extrusion hole is arranged at the downward side of the spinneret plate, a first melt guide hole, a second melt guide hole and a third melt guide hole are arranged at the upward side of the spinneret plate, and the first melt, the second melt and the third melt distributed by the melt distribution disc are simultaneously converged to the spinneret plate composite melt extrusion hole through the first melt guide hole, the second melt and the third melt and extruded and compounded through the spinneret plate composite melt extrusion hole. The crimp radius of the three-component parallel composite fiber after being formed is reduced, and the elasticity and the softness are improved; the fabric has extremely high elasticity and flexibility, and meets the requirements of blending with other fibers, being used as a filler, self-dyeing yarn and the like; the structure is simple and convenient to manufacture.

Description

Three-component parallel composite fiber spinning assembly

Technical Field

The utility model belongs to the technical field of compound spinning equipment, concretely relates to three components side by side type composite fiber spinning subassemblies.

Background

The known bi-component composite fiber such as the parallel polyester and nylon bi-component composite fiber has a longer production history in China and is mature in both equipment and process. The bicomponent composite fibers can be found in published chinese patent documents, such as CN101109110A (an eccentric bicomponent composite fiber and a preparation method thereof), using PPS and PBT, PBT and PA6 or PBT and PA 66; CN101798714B (bicomponent composite fiber and preparation method thereof) adopts PBT and PA; CN104195673B (Bi-component polyester composite fiber direct spinning method and system) adopts bi-component PBT.

The bicomponent composite fiber has good three-dimensional crimping performance, so the bicomponent composite fiber is widely applied to the field of knitting. However, since the crimp radius of the bicomponent composite fiber is relatively large, the amount of fiber crimp over a range of lengths is limited.

The three-component parallel composite fiber adopts fiber raw materials with different elongations after fiber formation, so that the nascent fiber can generate three-dimensional crimp after being stretched, the crimp radius is obviously smaller than that of the two-component composite fiber, and the crimp quantity of the three-component parallel composite fiber in a certain length range is obviously higher than that of the two-component composite fiber, so that the two-component composite fiber cannot be compared favorably with the extracted elasticity and softness of the three-component parallel composite fiber.

Technical information related to the aforementioned three-component conjugate fiber is also found in published chinese patent documents, such as CN1164810C (polyamide fine fiber and a method for producing the same), CN1185377C (polyaniline/polyamide conductive fiber and a method for producing the same), CN101892536B (a three-component fiber blend and a process for producing the same), CN101768796B (a multi-component conjugate fiber and a method for producing the same), CN101798713B (a multi-component conjugate fiber and a method for producing the same), CN103233292B (a method for producing meta-aramid fiber), and CN105908268B (a three-component conjugate fiber having high pilling resistance and high abrasion resistance and a method for producing the same), and the like.

As is known in the art, the spin pack is an important part of the complete spinning apparatus, and can be found in published chinese patent documents such as CN103668499A (bicomponent winding spinneret), CN206467344U (a bicomponent composite spinneret assembly), CN204509525U (spinneret structure of polylactic acid bicomponent composite fiber single-spinneret hole spin pack), and CN103668498A (bicomponent cross-spinneret), among others. The CN103668499A is that the fibers of two different materials are bonded together by certain viscosity before solidification; the CN206467344U is used for bonding the two-component materials to each other; the aforementioned CN20450925U is suitable for spinning of two identical materials (polylactic acid); the CN103668498A enables the primary yarns of the two materials to be interwoven but not intersected after being sprayed to form a bundle of tows.

None of the patents listed above, without being limited thereto, satisfy the requirement of having a uniform spacing of the fibres of two different raw materials and give no direct or indirect technical teaching.

The applicant of the present application, having a publication No. CN108707987A, entitled "spinning pack for bicomponent fibers", solves the problem of uniformly spacing and distributing fibers of two different materials, and thus, the technical effects described in paragraph 0021 of the specification are achieved.

From the above-mentioned CN108707987A, it is objective to have certain inspiration for designing a three-component spinning assembly, but since CN108707987A is directed to specific applications such as cigarette tows, it is aimed at the distribution uniformity between two fibers such as polylactic acid fiber and polypropylene fiber, so that a first spinneret hole (referred to as "spinneret hole i") and a second spinneret hole (referred to as "spinneret hole ii") are opened on a spinneret plate of a structural system of the composite spinning assembly in a spaced state, the first spinneret hole is communicated with a first melt guiding hole of a distribution plate on a melt distribution plate above the spinneret plate, the second spinneret hole is also communicated with a second melt guiding hole of the distribution plate on the melt distribution plate above the spinneret plate, the first and second spinneret holes are always in a spaced state, the obtained tow is a uniform mixed yarn of two raw materials, in the case of a single polylactic acid fiber and a single polypropylene fiber, they are not bonded to each other (see paragraph 0040 of the specification of CN 108707987A). However, since the three-component side-by-side type conjugate fiber is intended to include conjugate fibers each composed of three different materials, such as PLA, PTT and PBT, bonded to each other, or bonded to each other, the three-component fiber is preferred because it can be used for blending with other fibers, can be used as a filler, and can be independently spun.

Based on the above evaluation of CN108707987A, it is necessary to substantially improve the structure of the spinneret plate in order to satisfy the requirements for producing the three-component side-by-side type conjugate fiber.

Although technical information relating to spinnerets for processing three-component conjugate fibers is also visible in published chinese patent documents, such as CN202610410U recommended "spinnerets for three-component conjugate fibers" and CN205803643U provided "for preparing three-component conjugate hollow viscose fibers", etc., it does not suggest to spinnerets for the purpose of designing structural systems of three-component side-by-side conjugate fiber spinning packs mentioned above by the applicant. Since it is difficult to obtain a three-component side-by-side type conjugate fiber having a small crimp radius and excellent elasticity and softness as described above if there is a mismatching structure of the spinneret plate, the technical solution to be described below is made in such a background.

Disclosure of Invention

The task of the utility model is to provide a help to make the fuse-element of three kinds of different spinning raw materials realize outside the hole after the spinneret orifice of spinneret through respective route outside the spinneret complex and can show and reduce composite fiber's crimping radius and show and promote elasticity and compliance, be favorable to the terse nature of guarantee structure and can make things convenient for the preparation and embody the three components of economy low-priced effect and type composite fiber spinning subassembly side by side.

The utility model is a three-component parallel composite fiber spinning component, which comprises a cylinder body; a spinneret plate, a melt distribution disc, a melt guide disc, a melt filtering mechanism and a melt guide disc which are arranged in the cylinder cavity of the cylinder body from bottom to top in sequence; a lock nut ring which is screw-engaged with an upper portion of a wall of the cylinder chamber in the cylinder chamber and is defined by the lock nut ring with respect to a lower portion of the melt introduction plate, and an upper portion of the melt introduction plate extends above the lock nut ring and protrudes out of an upper plane of the cylinder, characterized in that the spinneret is supported in the lower portion of the cylinder chamber, spinneret composite melt extrusion holes are opened at a spacing state at a side of the spinneret facing downward, and spinneret first, second and third melt introduction holes equal in number to the number of the spinneret composite melt extrusion holes are opened at a side of the spinneret facing upward, the spinneret first, second and third melt introduction holes extending from the side of the spinneret facing upward to the spinneret composite melt extrusion holes, the first melt, the second melt and the third melt distributed by the melt distribution disc are simultaneously converged to the composite melt extrusion hole of the spinneret plate by the first melt outlet hole, the second melt outlet hole and the third melt respectively, and the composite melt extrusion hole of the spinneret plate extrudes and compounds.

In a specific embodiment of the present invention, a downward side of the melt guiding plate is fitted with an upper portion of the melt filtering mechanism, and a first melt guiding hole of the guiding plate, a second melt guiding hole of the guiding plate, and a third melt guiding hole of the guiding plate are formed on the melt guiding plate, wherein the first melt guiding hole of the guiding plate is located at a central position of the melt guiding plate, and the second melt guiding hole of the guiding plate and the third melt guiding hole of the guiding plate are respectively formed in a symmetrical state corresponding to two sides of the first melt guiding hole of the guiding plate and inclined; the filtering mechanism comprises a cylinder seat disc, an outer filtering cylinder and an inner filtering cylinder, the lower ends of the outer filtering cylinder and the inner filtering cylinder and the cylinder seat disc form an integral structure and extend out of the surface of one side, facing downwards, of the cylinder seat disc to be supported on one side, facing upwards, of the melt diversion disc, wherein the inner filtering cylinder is positioned in the outer filtering cylinder, the inner filtering cylinder cavity of the inner filtering cylinder is formed into a first melt filtering cavity, a first melt filtering cavity top sealing plate is arranged at the top of the first melt filtering cavity, a first melt filtering cavity top sealing plate through hole corresponding to and communicated with the first melt guide hole of the guide-in disc is formed in the center of the first melt filtering cavity top sealing plate, the space between the inner wall of the outer filtering cylinder and the outer wall of the inner filtering cylinder is formed into a second melt filtering cavity, the space between the outer wall of the outer filtering cylinder and the inner wall of the cylinder is formed into a third melt filtering cavity which is communicated with the third melt guide hole, a second melt filter cavity top sealing plate is arranged at the upper part of the second melt filter cavity, a second melt filter cavity top sealing plate through hole communicated with the second melt inlet hole of the inlet disc is arranged on the second melt filter cavity top sealing plate and at the position corresponding to the second melt inlet hole of the inlet disc, a cylinder seat disc first melt outlet hole is arranged on the cylinder seat disc and at the interval of the area corresponding to the first melt filter cavity, the cylinder seat disc first melt outlet hole is communicated with a first melt outlet cavity at the lower end of the inner filter cylinder and at the downward side of the cylinder seat disc, a cylinder seat disc second melt outlet hole is arranged on the cylinder seat disc and at the interval of the area corresponding to the second melt filter cavity, the cylinder seat disc second melt outlet hole is communicated with a second melt outlet cavity which is formed between the lower ends of the inner filter cylinder and the outer filter cylinder and is also at the downward side of the cylinder seat disc, a third melt outlet hole of the cylinder seat disc is arranged on the cylinder seat disc at intervals in the area corresponding to the third melt filter cavity, the third melt outlet hole of the cylinder seat disc is communicated with a third melt cavity formed between the lower end of the outer filter cylinder and the cavity wall of the cylinder cavity, the melt diversion disc is superposed on the melt distribution disc, a first melt diversion hole of the diversion disc, a pair of second melt diversion holes of the diversion disc and a pair of third melt diversion holes of the diversion disc are arranged on the melt diversion disc, the first melt diversion hole of the diversion disc is positioned in the center of the melt diversion disc and is corresponding to and communicated with the first melt outlet cavity, the second melt diversion hole of the diversion disc and the third melt diversion hole of the diversion disc are arranged on the edge of the melt diversion disc and are corresponding to and communicated with the second and third melt outlet cavities respectively, the melt distribution disc is superposed on the spinneret plate, the melt distribution disc is provided with a first melt distribution disc diversion groove, a pair of second melt distribution disc diversion grooves and a pair of third melt distribution disc diversion grooves, the first melt distribution disc diversion groove is arranged on one upward side of the melt distribution disc and corresponds to the first melt diversion hole of the diversion disc, the bottom of the first melt distribution disc diversion groove is provided with a group of first diversion groove first melt outlet holes at intervals, the group of first diversion groove first melt outlet holes are communicated with a first melt annular groove which is arranged on one downward side of the melt distribution disc in a circular ring shape, each first melt outlet hole corresponds to one first melt annular groove, the pair of second melt distribution disc diversion grooves and the pair of third melt distribution disc diversion grooves are arranged on the edge part of one upward side of the melt distribution disc at positions respectively corresponding to the second melt outlet cavity and the third melt outlet cavity, the second melt leading-out hole of the second guide groove is communicated with a second melt ring groove which is annularly arranged on one side of the melt distribution disc facing downwards, the third melt leading-out hole of the third guide groove is communicated with a third melt ring groove which is annularly arranged on one side of the melt distribution disc facing downwards, the first melt leading-out hole of the spinneret plate is communicated with the first melt ring groove, the second melt leading-out hole of the spinneret plate is communicated with the second melt ring groove, and the second melt leading-out hole of the spinneret plate is communicated with the third melt ring groove.

In another specific embodiment of the present invention, a spinneret supporting step seat is formed on the lower inner wall of the barrel cavity of the barrel, a supporting step seat seal ring is provided on the spinneret supporting step seat, a lock nut ring fitting internal thread is formed on the upper inner wall of the barrel cavity of the barrel, a spinneret supporting cavity is formed on one side of the spinneret facing downward and around the periphery of the spinneret, the spinneret supporting cavity is fitted with the supporting step seat seal ring, a lock nut ring external thread is formed on the outer wall of the lock nut ring and around the periphery of the lock nut ring, and the lock nut ring external thread is fitted with the lock nut ring fitting internal thread.

In another specific embodiment of the present invention, a positioning pin hole of the melt distribution plate is formed at an edge portion of an upward side of the spinneret plate, and a positioning pin of the melt distribution plate is formed at a downward side of the melt distribution plate and at a position corresponding to the positioning pin hole of the melt distribution plate, and the positioning pin of the melt distribution plate is inserted into the positioning pin hole of the melt distribution plate; and a hardware tool manual operation groove for screwing or unscrewing the locking nut ring is formed in the surface of one upward side of the locking nut ring at intervals.

In another specific embodiment of the present invention, the lower portion of the melt guiding plate and the surrounding of the melt guiding plate are formed with a melt guiding plate defining flange, a melt guiding plate defining flange sealing ring is disposed on the melt guiding plate defining flange, and the lower surface of the locking nut ring is in sealing fit with the melt guiding plate defining flange sealing ring.

In yet another specific embodiment of the present invention, a melt-introducing pan connector and a melt-introducing pan peripheral weir and a melt-introducing pan central cofferdam extend from the upper portion of the melt-introducing pan, the melt-introducing pan peripheral weir is located in the melt-introducing pan connector, the melt-introducing pan central cofferdam is located in the melt-introducing pan outer cofferdam, the space in the central region of the melt-introducing pan central cofferdam is a first melt-feeding chamber corresponding to and communicating with the first melt hole of the melt-introducing pan, the space between the inner wall of the melt-introducing pan outer cofferdam and the outer wall of the melt-introducing pan central cofferdam is a second melt-feeding chamber communicating with the second melt guide hole of the melt-introducing pan, the space between the inner wall of the melt-introducing pan connector and the outer wall of the melt-introducing pan outer cofferdam is a third melt-feeding chamber communicating with the third melt guide hole of the melt-introducing pan, and the inner wall of the melt leading-in disc connector is provided with melt leading-in connector inner wall threads, wherein rubber annular sealing rings are respectively arranged in the third melt feeding cavity, the melt leading-in disc outer cofferdam and the melt leading-in disc center cofferdam.

In a more specific embodiment of the present invention, a first melt guiding hole sealing ring of the guiding-in disc is embedded at the bottom of the melt guiding-in disc and at a position corresponding to the lower end of the first melt guiding hole of the guiding-in disc, a second melt guiding hole sealing ring of the guiding-in disc is embedded at a position corresponding to the lower end of the second melt guiding hole of the guiding-in disc, the first melt guiding hole of the guiding-in disc is sealed around the border portion with the through hole of the top sealing plate of the first melt filtering cavity by the first melt guiding hole sealing ring of the guiding-in disc, and the second melt guiding hole of the guiding-in disc is sealed around the border portion with the through hole of the top sealing plate of the second melt filtering cavity by the second melt guiding hole sealing ring of the guiding-in disc; an outer filter cartridge embedding groove is formed in the bottom of the melt leading-in disc and at a position corresponding to the upper end of the outer filter cartridge, an inner filter cartridge embedding groove is formed in a position corresponding to the upper end of the inner filter cartridge, the outer filter cartridge embedding groove is embedded and matched with the upper end of the outer filter cartridge, and the inner filter cartridge embedding groove is embedded and matched with the upper end of the inner filter cartridge; and a guide disc positioning pin hole is formed in the upward side of the second melt filter cavity top sealing plate, a guide disc positioning pin is fixed at the bottom of the melt guide disc and at a position corresponding to the guide disc positioning pin hole, the guide disc positioning pin is matched with the guide disc positioning pin hole, and the guide disc positioning pin hole is a blind hole.

The utility model discloses a further a concrete embodiment, melt filter mechanism still including a filter equipment and a secondary filter equipment, a filter equipment includes first, second prefilter net and third prefilter net, and first prefilter net sets up the top in first fuse-element chamber, the setting of second prefilter net is in the top in second fuse-element filter chamber, and the setting of third prefilter net is in the top in third fuse-element filter chamber, secondary filter equipment include inside, well, outer filter net, and interior filter net sets up the bottom in first fuse-element filter chamber, well filter net sets up the bottom in second fuse-element filter chamber, and the outer screen setting is in the bottom in third fuse-element filter chamber.

In a still more specific embodiment of the present invention, the lower ends of the first and third melt outlet holes of the spinneret are inclined toward the direction of the composite melt extrusion hole of the spinneret, and the second melt outlet hole of the spinneret is a straight hole.

In yet another specific embodiment of the present invention, the inner diameters of the first and second melt outlet holes of the spinneret plate and the third melt outlet hole of the spinneret plate are gradually reduced from the upper surface of the spinneret plate toward the direction of the composite melt extrusion hole of the spinneret plate and the melt outlets of the first, second and third melt outlet holes of the spinneret plate are combined by the composite melt extrusion hole of the spinneret plate.

The technical scheme provided by the utility model owing to for offering in the first, second fuse-element export hole of a spinneret and a spinneret third fuse-element export hole of the compound fuse-element of spinneret extrusion hole distribution of the bottom of spinneret, therefore can make the fuse-element of three kinds of different spinning raw materials pass through respective route and arrive the compound fuse-element export hole department of spinneret and converge and extrude simultaneously, extrude the complex by the compound fuse-element extrusion hole of spinneret with the popped effect, thereby can show the crimp radius that reduces three components side by side type composite fiber after the fibre-forming and show and promoted elasticity and compliance; the crimp number of the three-component parallel composite fiber in the length range of each meter can be increased by 30-40% compared with that of the two-component composite fiber, so that the three-component parallel composite fiber can embody extremely high elasticity and softness, and can meet the requirements of blending with other fibers, serving as a filler, self-dyeing yarn and the like; the whole structure is relatively simple, so that the device can be conveniently manufactured, used and maintained, and is economical and cheap.

Drawings

Fig. 1 is a structural diagram of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is a schematic view of a set of first, second and third melt outlet orifices of the spinneret plate of fig. 1 and 2.

Fig. 4 is A cross-sectional view A-O-A of fig. 3.

Fig. 5 is a partial cross-sectional view of the spinneret shown in fig. 1 and 2.

FIG. 6 is a bottom view of the melt distribution plate shown in FIGS. 1 and 2.

Fig. 7 is a bottom view of the spinneret shown in fig. 1 and 2.

FIG. 8 is a schematic cross-sectional view of a three-component side-by-side conjugate fiber emerging from a spinneret conjugate melt extrusion orifice and being conjugate to one another from first, second, and third melts.

Detailed Description

In order to make the technical essence and advantages of the present invention more clear, the applicant below describes in detail the embodiments, but the description of the embodiments is not a limitation of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not essential, should be considered as the technical scope of the present invention.

In the following description, any concept related to the directions or orientations of up, down, left, right, front and rear is based on the position state shown in fig. 1 and 2, and thus it should not be understood as a specific limitation to the technical solution provided by the present invention.

Referring to fig. 1 and 2, a cylindrical barrel is shown; a spinneret plate 2, a melt distribution disc 3, a melt diversion disc 4, a melt filtering mechanism 5 and a melt guiding disc 6 which are arranged or overlapped in sequence from bottom to top in a cylinder body cavity 11 of a cylinder body 1 are shown; a lock nut ring 7 is shown, which lock nut ring 7 is screw-engaged with the upper part of the wall of the barrel chamber 11 in the barrel chamber 11 and is delimited by the lock nut ring 7 against the lower part of the melt inlet disk 6, while the upper part of the melt inlet disk 6 extends above the lock nut ring 7 and out of the upper plane of the barrel 1.

As the technical scheme provided by the utility model: the spinneret 2 is supported at the lower part of the barrel 11, and has spinneret composite melt extrusion holes 24 formed in a circular shape at a lower side of the spinneret 2 and spaced apart from each other, and has spinneret first, second and third melt outlet holes 21, 22 and 23 formed at an upper side of the spinneret 2 in the same number as the number of the spinneret composite melt extrusion holes 24, the spinneret first, second and third melt outlet holes 21, 22 and 23 extending from the upper side of the spinneret 2 to the spinneret composite melt extrusion holes 24, wherein each of the spinneret composite melt extrusion holes 24 has a spinneret first, second and third melt outlet holes 21, 22 and a spinneret third melt outlet hole 23 assigned thereto, and the spinneret first, second and third melt outlet holes 21, 22 and 23 are formed by the spinneret first, second and third melt outlet holes, The third melt outlet holes 21, 22, 23 are used to simultaneously join the first, second and third melts distributed by the melt distribution plate 3 to the composite melt extrusion hole 24 of the spinneret plate and extrude and combine the melts from the composite melt extrusion hole 24 of the spinneret plate.

Continuing to refer to fig. 1 and 2, the downward side of the melt guiding plate 6 is fitted into the upper part of the melt filtering mechanism 5, and a first melt guiding hole 61 of the guiding plate, a second melt guiding hole 62 of the guiding plate and a third melt guiding hole 63 of the guiding plate are formed on the melt guiding plate 6, wherein the first melt guiding hole 61 of the guiding plate is located at the center of the melt guiding plate 6, and the second melt guiding hole 62 of the guiding plate and the third melt guiding hole 63 of the guiding plate correspond to the two sides of the first melt guiding hole 61 of the guiding plate in a symmetrical state and are obliquely formed; the filter mechanism 5 includes a cartridge base disc 51, an outer filter cartridge 52 and an inner filter cartridge 53, the lower ends of the outer filter cartridge 52 and the inner filter cartridge 53 and the cartridge base disc 51 form an integral structure and protrude out of the surface of the downward side of the cartridge base disc 51 to be supported on the upward side of the melt guiding disc 4, wherein the inner filter cartridge 53 is located in the outer filter cartridge 52, the inner filter cartridge cavity of the inner filter cartridge 53 is a first melt filter cavity 531, a first melt filter cavity top sealing plate 5311 is provided on the top of the first melt filter cavity 531, a first melt filter cavity top sealing plate through hole 53111 corresponding to and communicating with the first melt guiding hole 61 of the guiding disc is provided at the center position of the first melt filter cavity top sealing plate 5311, the space between the inner wall of the outer filter cartridge 52 and the outer wall of the inner filter cartridge 53 is a second melt filter cavity 521, and the space between the outer wall of the outer filter cartridge 52 and the inner wall of the cartridge 1 is a third melt filter cavity 522, the third melt filter cavity 522 is communicated with the third melt guiding hole 63 of the aforesaid inlet pan, a second melt filter cavity top closing plate 5211 is provided at the upper part of the aforesaid second melt filter cavity 521, a second melt filter cavity top closing plate through hole 52111 communicating with the second melt guiding hole 62 of the aforesaid inlet pan is provided at the second melt filter cavity top closing plate 5211 and at a position corresponding to the aforesaid second melt guiding hole 62 of the aforesaid inlet pan, a cartridge seat pan first melt outlet hole 511 is provided at the cartridge seat pan 51 and at a spacing from a region corresponding to the aforesaid first melt filter cavity 531, that is, at the middle region of the cartridge seat pan 51, the cartridge seat pan first melt outlet hole 511 is communicated with the first melt outlet cavity 532 located at the downward side of the aforesaid cartridge seat pan 51 from the lower end of the aforesaid inner filter cylinder 53, a cartridge seat pan second melt outlet hole 512 is provided at a spacing from the outer periphery of the cartridge seat pan first melt outlet hole 511 from a region corresponding to the aforesaid second melt filter cavity 521, the cartridge tray second melt discharge hole 512 is communicated with a second melt discharge chamber 514 formed between the lower ends of the inner and outer filter cartridges 53, 52 and also located on the downward side of the cartridge tray 51, a cartridge tray third melt discharge hole 513 is provided on the cartridge tray 51 and spaced apart from the region corresponding to the third melt filter chamber 522, i.e., the peripheral region of the cartridge tray second melt discharge hole 512, the cartridge tray third melt discharge hole 513 is communicated with a third melt chamber 523 formed between the lower end of the outer filter cartridge 52 and the chamber wall of the cartridge chamber 11, the melt deflector 4 is stacked on the melt distributor 3, a deflector first melt guide hole 41, a pair of deflector second melt guide holes 42 and a pair of deflector third melt guide holes 43 are provided on the melt deflector 4 to penetrate from the upper surface to the lower surface of the melt deflector 4, the deflector first melt guide hole 41 is located at the center of the melt deflector 4 and is communicated with the first melt guide hole 43 The discharging cavities 532 correspond to and are communicated with each other, a pair of guiding disc second melt guiding holes 42 and a pair of guiding disc third melt guiding holes 43 are arranged at the edge part of the melt guiding disc 4 and correspond to and are communicated with the second and third melt discharging cavities 514 and 523 respectively, the melt distribution disc 3 is superposed on the spinneret plate 2, the melt distribution disc 3 is provided with a melt distribution disc first guiding groove 31, a pair of melt distribution disc second guiding grooves 32 and a pair of melt distribution disc third guiding grooves 33, the melt distribution disc first guiding groove 31 is arranged at the upward side of the melt distribution disc 3 and corresponds to the guiding disc first melt guiding hole 41, the bottom of the melt distribution disc first guiding groove 31 is provided with a group of first guiding groove first melt leading-out holes 311 at intervals, the group of first guiding groove first melt leading-out holes 311 are communicated with a circular first melt ring-shaped groove 34 arranged at the downward side of the melt distribution disc 3, wherein, each first melt leading-out hole 311 is correspondingly provided with a first melt ring groove 34, a pair of second guiding chutes 32 of the melt distribution plate and a pair of third guiding chutes 33 of the melt distribution plate are arranged at the edge parts of one upward side of the melt distribution plate 3 at the positions respectively corresponding to the second and third melt discharging cavities 514 and 523, wherein, two ends of the second guiding chutes 32 of the melt distribution plate are respectively provided with a second guiding chute second melt leading-out hole 321, the second guiding chute second melt leading-out hole 321 is communicated with a second melt ring groove 35 which is annularly arranged at one downward side of the melt distribution plate 3, two ends of the third guiding chutes 33 of the melt distribution plate are respectively provided with a third guiding chute third melt leading-out hole 331, the third guiding chute third melt hole 331 is communicated with a third melt ring groove 36 which is annularly arranged at one downward side of the melt distribution plate 3, the spinneret first melt outlet port 21 communicates with the first melt ring groove 34, the spinneret second melt outlet port 22 communicates with the second melt ring groove 35, and the spinneret second melt outlet port 23 communicates with the third melt ring groove 36.

Referring to fig. 1 to 2 and fig. 6, the first, second and third melt ring grooves 34, 35 and 36 are in a spaced-apart relationship (see fig. 6 in particular), for convenience of description, six ring grooves are shown in fig. 6, and two first, second and third melt ring grooves 34, 35 and 36 are provided, based on the position state shown in fig. 6, from inside to outside: two sets of first, second and third melt ring grooves 34, 35, 36.

Continuing with fig. 1 and 2, a spinneret support step seat 111 is formed on the lower inner wall of the body cavity 11 of the barrel 1, a support step seat packing 1111 is provided on the spinneret support step seat 111, a lock nut ring engaging internal thread 112 is formed on the upper inner wall of the body cavity 11 of the barrel 1, a spinneret support cavity 25 is formed on the side of the spinneret 2 facing downward and around the periphery of the spinneret 2, the spinneret support cavity 25 is engaged with the support step seat packing 1111, and a lock nut ring external thread 71 is formed on the outer wall of the lock nut ring 7 and around the lock nut ring 7, the lock nut ring external thread 71 being threadedly engaged with the lock nut ring engaging internal thread 112.

As shown in fig. 1 and 2, a melt distribution plate positioning pin hole 26 is formed in the edge portion of the upward side of the spinneret plate 2, and a melt distribution plate positioning pin 37 is formed in the downward side of the melt distribution plate 3 at a position corresponding to the melt distribution plate positioning pin hole 26, and the melt distribution plate positioning pin 37 is inserted into the melt distribution plate positioning pin hole 26; on the side surface of the lock nut ring 7 facing upward, a hand-operated tool slot 72 for screwing or unscrewing the lock nut ring 7 is opened at a distance, and a typical example of the tool referred to herein is a wrench.

A melt-inlet-disk-defining flange 64 having an inclined upper surface is formed at a lower portion of the melt-inlet disk 6 and around the periphery of the melt-inlet disk 6, and a melt-inlet-disk-defining flange-sealing ring 641 is provided on the melt-inlet-disk-defining flange 64, and the lower surface of the lock nut ring 7 is in sealing engagement with the melt-inlet-disk-defining flange-sealing ring 641.

A melt-inlet-pan connecting head 65 and a melt-inlet-pan outer weir 66 as well as a melt-inlet-pan central weir 67 extend above the melt-inlet pan 6, the melt-inlet-pan peripheral weir 66 being located in the melt-inlet-pan connecting head 65 and the melt-inlet-pan central weir 67 being located in the melt-inlet-pan peripheral weir 66, the space in the central region of the melt-inlet-pan central weir 67 being formed as a first melt-inlet chamber 671 which corresponds to and communicates with the aforementioned inlet-pan first melt bore 61, the space between the inner wall of the melt-inlet-pan peripheral weir 66 and the outer wall of the melt-inlet-pan central weir 67 being formed as a second melt-inlet chamber 661 which communicates with the aforementioned inlet-pan second melt guide bore 62, the space between the inner wall of the melt-inlet-pan connecting head 65 and the outer wall of the melt-inlet-pan outer weir 66 being formed as a third melt-inlet chamber 651 which communicates with the aforementioned inlet, and melt inlet disk connector inner wall threads 652 are provided on the inner wall of the melt inlet disk connector 65, wherein a rubber ring seal 68 is provided in each of the third melt feed cavity 651, the melt inlet disk peripheral weir 66 and the melt inlet disk central weir 67.

First, second and third melts such as a PLA melt, a PTT melt and a PBT melt (the same applies hereinafter) metered by a melt metering pump are introduced into the aforementioned first melt-feeding chamber 671, second melt-feeding chamber 661 and third melt-feeding chamber 651, respectively, from melt paths connected to the melt-introducing-tray connection 65.

Still referring to fig. 1 and 2, a first melt guiding hole sealing ring 611 of the inlet plate is fitted in the bottom of the melt inlet plate 6 at a position corresponding to the lower end of the first melt guiding hole 61 of the inlet plate, a second melt guiding hole sealing ring 621 of the inlet plate is fitted in a position corresponding to the lower end of the second melt guiding hole 62 of the inlet plate, the first melt guiding hole 61 of the inlet plate is sealed around the portion bordering on the through hole 53111 of the top sealing plate of the first melt filtering chamber by the first melt guiding hole sealing ring 611 of the inlet plate, and the second melt guiding hole 62 of the inlet plate is sealed around the portion bordering on the through hole 52111 of the top sealing plate of the second melt filtering chamber by the second melt guiding hole sealing ring 621 of the inlet plate; an outer filter cartridge fitting groove 69a is formed in the bottom of the melt inlet tray 6 at a position corresponding to the upper end of the outer filter cartridge 52, an inner filter cartridge fitting groove 69b is formed in a position corresponding to the upper end of the inner filter cartridge 53, the outer filter cartridge fitting groove 69a is fitted to the upper end of the outer filter cartridge 52, and the inner filter cartridge fitting groove 69b is fitted to the upper end of the inner filter cartridge 53; a feed-in pan positioning pin hole 52112 is formed in the upward facing side of the second melt filter cavity top closure plate 5211, and a feed-in pan positioning pin 69c is fixed to the bottom of the melt feed-in pan 6 at a position corresponding to the feed-in pan positioning pin hole 52112, the feed-in pan positioning pin 69c being fitted into the feed-in pan positioning pin hole 52112, and the feed-in pan positioning pin hole 52112 being a blind hole.

Continuing with fig. 1 and 2, the melt filter mechanism 5 further comprises a primary filter device 54 and a secondary filter device 55, wherein the primary filter device 54 comprises first, second primary filters 541, 542 and a third primary filter 543, the first primary filter 541 is disposed at the top of the first melt chamber 531, the second primary filter 542 is disposed at the top of the second melt chamber 521, the third primary filter 543 is disposed at the top of the third melt chamber 522, the secondary filter device 55 comprises inner, middle and outer filters 551, 552, 553, the inner filter 551 is disposed at the bottom of the first melt chamber 531, the middle filter 552 is disposed at the bottom of the second melt chamber 521, and the outer filter 553 is disposed at the bottom of the third melt chamber 522.

As shown in fig. 2, in an actual usage state, a first melt filter sand 8a is disposed in the first melt filter chamber 531 between the first primary filter 541 and the inner filter 551, a second melt filter sand 8b is disposed in the second melt filter chamber 521 between the second primary filter 542 and the middle filter 552, and a third melt filter sand 8c is disposed in the third melt filter chamber 522 between the third primary filter 543 and the outer filter 553.

Referring to fig. 3 and 4 and fig. 5, the lower ends of the first and third melt outlet orifices 21 and 23 are inclined toward the composite melt extrusion orifice 24 of the spinneret, and the second melt outlet orifice 22 of the spinneret is a straight orifice.

The inner diameters of the first and second melt outlet orifices 21, 22 of the spinneret and the third melt outlet orifice 23 of the spinneret are gradually reduced from the upper surface of the spinneret 2 in the direction of the composite melt extrusion orifice 24 of the spinneret, and the melt outlets of the first, second and third melt outlet orifices 21, 22, 23 of the spinneret are merged by the composite melt extrusion orifice 24 of the spinneret, that is, the three melt outlets of the first, second and third melt outlet orifices 21, 22, 23 of the spinneret are merged to the composite melt extrusion orifice 24 of the spinneret.

Referring to fig. 7, for the sake of convenience of illustration, the applicant shows in fig. 7 two rings of spinneret composite melt extrusion orifices 24 arranged in a circular array and spaced apart at the bottom of the spinneret 2, each spinneret composite melt extrusion orifice 24 being assigned one spinneret first melt outlet orifice 21, one spinneret second melt outlet orifice 22 and one spinneret third melt outlet orifice 24 as described above. Since the first, second and third melt outlet openings 21, 22, 23 of the spinneret are identical in the form of the first, second and third melt outlets, respectively, for the PLA melt, the PTT melt and the PBT melt described above, but differ from one another only in their passage, the applicant describes the first melt only in the following.

The first melt (in this embodiment, PLA melt) is introduced into the first melt-feeding cavity 671 through the above-mentioned conduit connected to the melt-introducing pan connector 65, and the first melt entering the first melt-feeding cavity 671 is introduced into, i.e., extruded into, the spinneret composite melt extrusion hole 24 through the first melt-introducing pan guide hole 61, the first melt-chamber top-sealing plate through-hole 53111, the first pre-filter 541, the first melt-filtered sand 8a, the bobbin-base-pan first melt-outlet 511, the first melt-outlet cavity 532, the deflector-pan first melt-guide hole 41, the melt-distribution-pan first guide gutter 31, the first guide-gutter first melt-outlet 311, and the spinneret first melt-outlet 21, while the second and third melts, i.e., melts and PBT are introduced into, i.e., extruded into, the spinneret composite melt extrusion hole 24 through the second and third melt- outlet orifices 22 and 23 of the spinnerets in the same manner as described above, the three-component side-by-side type composite fiber 9 with the cross section shape shown in figure 8 is obtained by extruding the three-component side-by-side type composite melt filaments from the composite melt extrusion holes 24 of the spinneret plate by the bulking effect and carrying out subsequent procedures of blowing, cooling, oiling and the like.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims (10)

1. A three-component parallel composite fiber spinning assembly comprises a barrel; a spinneret plate (2), a melt distribution disc (3), a melt diversion disc (4), a melt filtering mechanism (5) and a melt guiding disc (6) which are arranged in a cylinder body cavity (11) of the cylinder body (1) from bottom to top in sequence; a lock nut ring (7), the lock nut ring (7) is in threaded fit with the upper part of the cavity wall of the cavity (11) in the cavity (11) and is limited by the lock nut ring (7) to the lower part of the melt guiding disc (6), the upper part of the melt guiding disc (6) extends to the upper part of the lock nut ring (7) and protrudes out of the upper plane of the barrel (1), characterized in that the spinneret plate (2) is supported at the lower part of the cavity (11), spinneret plate composite melt extrusion holes (24) are opened at intervals at the downward side of the spinneret plate (2), and spinneret plate first melt outlet holes (21), spinneret plate second melt outlet holes (22) and spinneret plate third melt outlet holes (23) with the number equal to that of the spinneret plate composite melt extrusion holes (24) are opened at the upward side of the spinneret plate (2), the first and second melt outlet openings (21, 22) and the third melt outlet opening (23) of the spinning plate extend from the upwardly facing side of the spinning plate (2) to the composite melt extrusion opening (24) of the spinning plate, wherein each composite melt extrusion opening (24) of the spinning plate is assigned a first and second melt outlet opening (21, 22) and a third melt outlet opening (23) of the spinning plate, from which first, second and third melt outlet openings (21, 22, 23) of the spinning plate the first and second melts and the third melt, respectively, assigned by the melt distribution plate (3) are simultaneously combined to the composite melt extrusion opening (24) of the spinning plate and are extruded from the composite melt extrusion opening (24) of the spinning plate.

2. The three-component side-by-side type composite fiber spinning pack according to claim 1, wherein the melt introduction tray (6) is fitted with the upper portion of the melt filtering mechanism (5) at a downward-facing side thereof, and a first melt introduction hole (61) of the melt introduction tray, a second melt introduction hole (62) of the melt introduction tray and a third melt introduction hole (63) of the melt introduction tray are formed in the melt introduction tray (6) so as to penetrate from the upper surface to the lower surface of the melt introduction tray (6), wherein the first melt introduction hole (61) of the melt introduction tray is located at the center of the melt introduction tray (6), and the second melt introduction hole (62) of the melt introduction tray and the third melt introduction hole (63) of the melt introduction tray respectively correspond to both sides of the first melt introduction hole (61) of the melt introduction tray in a symmetrical state and are formed obliquely; the filtering mechanism (5) comprises a cylinder base disc (51), an outer filtering cylinder (52) and an inner filtering cylinder (53), the lower ends of the outer filtering cylinder (52) and the inner filtering cylinder (53) and the cylinder base disc (51) form an integral structure, the lower side surface of the cylinder base disc (51) extends out of the downward side surface of the cylinder base disc (51) and is supported on the upward side of the melt diversion disc (4), wherein the inner filtering cylinder (53) is positioned in the outer filtering cylinder (52), the inner filtering cylinder cavity of the inner filtering cylinder (53) is formed into a first melt filtering cavity (531), a first melt filtering cavity top sealing plate (5311) is arranged at the top of the first melt filtering cavity (531), a first melt filtering cavity top sealing plate through hole (53111) corresponding to and communicated with the first melt (61) of the guiding disc is arranged at the central position of the first melt filtering cavity top sealing plate (5311), a space between the inner wall of the outer filtering cylinder (52) and the outer wall of the inner filtering cylinder (53) is formed into a second melt filtering cavity (521, and the space between the outer wall of the outer filter cartridge (52) and the inner wall of the cylinder (1) is formed as a third melt filter chamber (522), the third melt filter chamber (522) is communicated with the third melt guiding hole (63) of the lead-in plate, a second melt filter chamber top closing plate (5211) is provided at the upper part of the second melt filter chamber (521), a second melt filter chamber top through hole (52111) communicated with the second melt guiding hole (62) of the lead-in plate is provided at the second melt filter chamber top closing plate (5211) and at a position corresponding to the second melt guiding hole (62) of the lead-in plate, a cylinder seat plate first melt outlet hole (511) is provided at the cylinder seat plate (51) and at a position spaced apart from the first melt filter chamber (531), the cylinder seat plate first melt outlet hole (511) is communicated with a first melt outlet chamber (532) from the lower end of the inner filter cartridge (53) and at the side of the cylinder seat plate (51) facing downward, a base plate second melt outlet (512) is arranged on the base plate (51) and at a distance from the area corresponding to the second melt filter chamber (521), the base plate second melt outlet (512) is communicated with a second melt outlet chamber (514) which is formed between the lower ends of the inner and outer filter cartridges (53, 52) and is also positioned on the downward side of the base plate (51), a base plate third melt outlet (513) is arranged on the base plate (51) and at a distance from the area corresponding to the third melt filter chamber (522), the base plate third melt outlet (513) is communicated with a third melt chamber (523) which is formed between the lower end of the outer filter cartridge (52) and the chamber wall of the body chamber (11), the melt deflector (4) is superposed on the melt distribution plate (3), and a deflector hole (41) which penetrates from the upper surface to the lower surface of the melt deflector (4) is arranged on the melt deflector (4) A pair of guide disc second melt guide holes (42) and a pair of guide disc third melt guide holes (43), wherein the guide disc first melt guide hole (41) is positioned at the central position of the melt guide disc (4) and corresponds to and communicates with the first melt discharging cavity (532), the pair of guide disc second melt guide holes (42) and the pair of guide disc third melt guide holes (43) are arranged at the edge part of the melt guide disc (4) and respectively correspond to and communicate with the second and third melt discharging cavities (514, 523), the melt distribution disc (3) is superposed on the spinneret plate (2), a melt distribution disc first guide groove (31), a pair of melt distribution disc second guide grooves (32) and a pair of melt distribution disc third guide grooves (33) are arranged on the melt distribution disc (3), and the melt distribution disc first guide groove (31) is arranged at the upward side of the melt distribution disc (3) and corresponds to and communicates with the guide disc first melt guide groove (33) The flow guide holes (41) correspond to each other, a group of first flow guide groove first melt leading-out holes (311) are arranged at the bottom of the first flow guide groove (31) of the melt distribution disc at intervals, the group of first flow guide groove first melt leading-out holes (311) are communicated with a first melt annular groove (34) which is arranged on the downward side of the melt distribution disc (3) in a circular ring shape, each first melt leading-out hole (311) is correspondingly provided with one first melt annular groove (34), a pair of second flow guide grooves (32) of the melt distribution disc and a pair of third flow guide grooves (33) of the melt distribution disc are arranged on the edge part of the upward side of the melt distribution disc (3) at the positions respectively corresponding to the second melt discharge cavity (514) and the third melt discharge cavity (523), wherein second flow guide groove second melt leading-out holes (321) are respectively arranged at two ends of the second flow guide grooves (32) of the melt distribution disc, the second melt leading-out hole (321) of the second flow guide groove is communicated with a second melt annular groove (35) which is formed in the downward side of the melt distribution disc (3) in a circular mode, the two ends of a third flow guide groove (33) of the pair of melt distribution discs are respectively provided with a third melt leading-out hole (331) of the third flow guide groove, the third melt leading-out hole (331) of the third flow guide groove is communicated with a third melt annular groove (36) which is formed in the downward side of the melt distribution disc (3) in a circular mode, the first melt leading-out hole (21) of the spinneret plate is communicated with the first melt annular groove (34), the second melt leading-out hole (22) of the spinneret plate is communicated with the second melt annular groove (35), and the second melt leading-out hole (22) of the spinneret plate is communicated with the third melt annular groove (36).

3. The three-component side-by-side composite fiber spinning pack according to claim 1, wherein a spinneret supporting step seat (111) is formed on a lower inner wall of the barrel chamber (11) of said barrel (1), a supporting step seat sealing ring (1111) is arranged on the spinneret plate supporting step seat (111), a locking nut ring matched internal thread (112) is formed on the inner wall of the upper part of the cylinder cavity (11) of the cylinder body (1), a spinneret support chamber (25) is formed on the side of the spinneret plate (2) facing downwards and around the spinneret plate (2), the spinneret plate supporting cavity (25) is matched with the supporting step seat sealing ring (1111), a locknut ring external thread (71) is formed on the outer wall of the locknut ring (7) and around the locknut ring (7), the locking nut ring external thread (71) is in threaded fit with the locking nut ring matching internal thread (112).

4. The three-component side-by-side composite fiber spinning pack according to claim 1, wherein a melt distribution plate positioning pin hole (26) is formed at an edge portion of an upward-facing side of the spinneret plate (2), and a melt distribution plate positioning pin (37) is formed at a downward-facing side of the melt distribution plate (3) at a position corresponding to the melt distribution plate positioning pin hole (26), the melt distribution plate positioning pin (37) being inserted into the melt distribution plate positioning pin hole (26); and a hardware tool manual operation groove (72) for screwing or unscrewing the locking nut ring (7) is formed in the upward side surface of the locking nut ring (7) at intervals.

5. The three-component side-by-side composite fiber spinning pack according to claim 1, wherein a melt-inlet-disc-defining flange rim (64) is formed at a lower portion of the melt-inlet disc (6) and around the periphery of the melt-inlet disc (6), a melt-inlet-disc-defining flange rim seal ring (641) is provided on the melt-inlet-disc-defining flange rim (64), and a lower surface of the lock nut ring (7) is in sealing engagement with the melt-inlet-disc-defining flange rim seal ring (641).

6. The three-component side-by-side conjugate fiber spinning pack according to claim 2, wherein a melt-intake pan connecting head (65) and a melt-intake pan outer cofferdam (66) and a melt-intake pan central cofferdam (67) extend from the upper portion of said melt-intake pan (6), the melt-intake pan peripheral weir (66) being located within the melt-intake pan connecting head (65), and the melt-intake pan central cofferdam (67) being located within the melt-intake pan outer cofferdam (66), the space in the central region of the melt-intake pan central cofferdam (67) being configured as a first melt-feed chamber (671) corresponding to and communicating with said intake pan first melt holes (61), the space between the inner wall of the melt-intake pan outer cofferdam (66) and the outer wall of the melt-intake pan central cofferdam (67) being configured as a second melt-feed chamber (661) communicating with said intake pan second melt-intake hole (62), the space between the inner wall of the melt guide-in disc connecting head (65) and the outer wall of the melt guide-in disc outer cofferdam (66) is a third melt feeding cavity (651) communicated with the third melt guide hole (63) of the guide-in disc, and the inner wall of the melt guide-in disc connecting head (65) is provided with melt guide-in connecting head inner wall threads (652), wherein rubber annular sealing rings (68) are respectively arranged in the third melt feeding cavity (651), the melt guide-in disc outer cofferdam (66) and the melt guide-in disc central cofferdam (67).

7. The three-component side-by-side conjugate fiber spinning pack according to claim 2, wherein a melt introduction disc first melt guide hole seal ring (611) is embedded in the bottom of said melt introduction disc (6) at a position corresponding to the lower end of said melt introduction disc first melt guide hole (61), a guide-in disc second melt guide hole sealing ring (621) is embedded at the position corresponding to the lower end of the guide-in disc second melt guide hole (62), the guide-in disc first melt guide hole sealing ring (611) seals the guide-in disc first melt guide hole (61) at the periphery of the connection part of the guide-in disc first melt guide hole and the first melt filter cavity top sealing plate through hole (53111), the second melt guide hole (62) of the guide-in disc is sealed around the part which is connected with the through hole (52111) of the top sealing plate of the second melt filter cavity by a seal ring (621) of the second melt guide hole of the guide-in disc; an outer filter cylinder fitting groove (69a) is formed in the bottom of the melt inlet plate (6) at a position corresponding to the upper end of the outer filter cylinder (52), an inner filter cylinder fitting groove (69b) is formed in the position corresponding to the upper end of the inner filter cylinder (53), the outer filter cylinder fitting groove (69a) is fitted to the upper end of the outer filter cylinder (52), and the inner filter cylinder fitting groove (69b) is fitted to the upper end of the inner filter cylinder (53); a guide disc positioning pin hole (52112) is formed in the upward side of the second melt filter cavity top sealing plate (5211), a guide disc positioning pin (69c) is fixed to the bottom of the melt guide disc (6) at a position corresponding to the guide disc positioning pin hole (52112), the guide disc positioning pin (69c) is matched with the guide disc positioning pin hole (52112), and the guide disc positioning pin hole (52112) is a blind hole.

8. The three-component side-by-side conjugate fiber spinning pack according to claim 2, wherein said melt filtering means (5) further comprises a primary filtering means (54) and a secondary filtering means (55), said primary filtering means (54) comprises first, second primary filters (541, 542) and third primary filter (543), said first primary filter (541) is disposed on top of said first melt chamber (531), said second primary filter (542) is disposed on top of said second melt chamber (521), said third primary filter (543) is disposed on top of said third melt chamber (522), said secondary filtering means (55) comprises inner, middle and outer filters (551, 552, 553), said inner filter (551) is disposed on bottom of said first melt chamber (531), said middle filter (552) is disposed on bottom of said second melt chamber (521), and an outer wire (553) is arranged at the bottom of the third melt filter chamber (522).

9. The three-component side-by-side composite fiber spinning pack according to claim 1, wherein said spinneret first melt exit orifice (21) and said spinneret third melt exit orifice (23) are inclined at their lower ends toward said spinneret composite melt extrusion orifice (24), and said spinneret second melt exit orifice (22) is a straight orifice.

10. The three-component side-by-side composite fiber spinning pack according to claim 1 or 9, wherein said first and second melt outlet orifices (21, 22) of the spinneret and said third melt outlet orifice (23) of the spinneret are tapered in inner diameter from the upper surface of said spinneret (2) toward said composite melt extrusion orifice (24) of the spinneret and the melt outlets of the first and second melt outlet orifices (21, 22, 23) of the spinneret are merged by said composite melt extrusion orifice (24) of the spinneret.

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