Bi-component composite fiber spinning assembly

Abstract

A two-component composite fiber spinning assembly belongs to the technical field of composite spinning equipment. It includes a cylinder; a spinneret, which is arranged at the bottom of the cylinder cavity and has a capillary spinneret hole; a melt distribution plate, which is stacked above the spinneret and has a melt distribution hole, and a left and right material collecting cavity of the melt distribution plate on one side of the melt distribution plate; a double-cavity filter cylinder, which is arranged at the upper part of the cylinder cavity, has a left and a right filter cavity, a first component melt filtering mechanism is arranged in the left filter cavity, and a second component melt filtering mechanism is arranged in the right filter cavity; a cylinder cover, which is fixed to the top surface of the cylinder; features: the capillary spinneret hole of the spinneret includes the first and second component melt discharge holes of the spinneret; the melt distribution hole includes the first and second component melt guide holes of the melt distribution plate, and the first and second component melt annular guide grooves; the first and second component melt introduction holes are arranged on the cylinder cover. Ensure the quality of the two-component fiber; reduce the probability of melt leakage; reduce the height to facilitate maintenance and simplify the structure.

Description

Technical Field

[0001] The invention belongs to the technical field of composite spinning equipment, and in particular relates to a two-component composite fiber spinning assembly. Background Art

[0002] A typical example of the above-mentioned bicomponent composite fiber is a polylactic acid bicomponent composite fiber spun from a high molecular weight polylactic acid melt and a low molecular weight polylactic acid melt having a large difference in molecular weight. For this, please refer to the "polylactic acid bicomponent composite fiber spinning process" introduced in the Chinese invention patent application publication number CN105714391A. However, the above-mentioned bicomponent composite fiber is not limited to the polylactic acid bicomponent composite fiber, and can also be, for example, bicomponent composite fibers such as those mentioned in CN101109110A, CN101798714B and CN104195673B.

[0003] Taking polylactic acid two-component composite fiber as an example, it is widely favored by people because of its good biodegradability, which protects the environment, and its excellent antibacterial and skin-protecting properties, which make it suitable for making close-fitting clothing, etc. However, since the temperature range of polylactic acid melt is very narrow, melt degradation is very likely to occur during the spinning process, especially the two melts such as the high and low molecular weight polylactic acid melts mentioned above, because the melting temperature deviation is large, after the two melts enter the same spinning assembly from their respective spinning boxes, the two melt temperatures will affect each other where they are close, making it difficult to guarantee the fiber quality. In particular, because the filtering melting cavity of the spinning assembly used for melt-spun staple fibers is relatively large, the problem of the aforementioned two melt temperatures affecting each other is more prominent.

[0004] In the public Chinese patent documents, technical information related to the two-component composite fiber spinning assembly can be found, such as the "internal filtering structure of the polylactic acid two-component composite fiber spinning assembly" recommended by CN204509515U. Although this patent can achieve the invention purpose recorded in paragraph 0005 of its specification and embody the technical effects mentioned in paragraphs 0010 to 0024 of the specification, it has the following shortcomings: First, since the two polylactic acid melts filtered by the upper and lower sand cups respectively converge into the same capillary spinneret hole after reaching the feed slot of the spinneret and are ejected from the same capillary spinneret hole, it is difficult to achieve the uniformity, that is, the degree of consistency, of the two different polylactic acid melts. To ensure that the quality of the polylactic acid two-component composite fiber will eventually be affected; secondly, because the two melts are introduced into the upper sand cup filter sand and the lower sand cup filter sand from the two feed ports at the top in the height direction, namely the polylactic acid A component feed port and the polylactic acid B component feed port referred to in the patent, it is required to use a box melt delivery pipeline between the spinning box and the two feed ports, which not only increases the difficulty of connecting the spinning box and the spinning assembly, but also increases the probability of leakage; thirdly, because it is necessary to use the upper sand cup and the lower sand cup for filtering the two melts respectively and set a feed distribution plate with a connecting pipe between the upper and lower sand cups, the structure is relatively complicated. In view of the above, it is necessary to make improvements, and the technical solution to be introduced below is produced in this context. Summary of the invention

[0005] The task of the present invention is to provide a two-component composite fiber spinning assembly which helps to make two melts merge and extrude and expand at the spinneret on the spinneret so as to always ensure the uniformity of the two melt amounts and ensure the quality of the two-component composite fiber, is conducive to connecting with the spinning box without using pipelines and thus significantly reducing the probability of melt leakage, is beneficial to significantly reduce the height and abandons the feed distribution plate with a connecting pipe to simplify the structure.

[0006] The task of the present invention is accomplished in this way. A two-component composite fiber spinning assembly includes a barrel; a spinneret, which is arranged at the bottom of the barrel cavity of the barrel, and is provided with a spinneret capillary spinneret hole; a melt distribution plate, which is stacked above the spinneret and fixed to the spinneret, and is provided with a melt distribution hole, which is communicated with the spinneret capillary spinneret hole, and a melt distribution plate left side is formed on the upper side of the melt distribution plate A collecting cavity and a right collecting cavity of a melt distribution plate, the left collecting cavity of the melt distribution plate and the right collecting cavity of the melt distribution plate are communicated with the melt distribution hole; a double-cavity filter cartridge, the double-cavity filter cartridge is arranged at the upper part of the cylinder cavity, and the double-cavity filter cartridge has a left filter cavity and a right filter cavity separated from each other, a first component melt filtering mechanism is arranged in the left filter cavity, and a second component melt filtering mechanism is arranged in the right filter cavity, the first component melt filtering mechanism corresponds to the left collecting cavity of the melt distribution plate and is mutually The second component melt filtering mechanism corresponds to and communicates with the right collecting cavity of the melt distribution plate; a cylinder cover, which is fixed to the top surface of the cylinder at a position corresponding to the upper side of the double-cavity filter cylinder; the spinneret capillary spinneret hole includes a spinneret first component melt outlet hole annular distribution circle and a spinneret second component melt outlet hole annular distribution circle which are arranged around the spinneret and from the periphery of the spinneret to the center of the spinneret to form a concentric spinneret first component melt outlet hole annular distribution circle. A first component melt discharge hole and a second component melt discharge hole of a spinneret, wherein the first component melt discharge hole annular distribution circle and the second component melt discharge hole annular distribution circle form a one-to-one positional relationship with each other, and the first component melt discharge holes of the spinneret on two adjacent first component melt discharge hole annular distribution circles and the second component melt discharge holes of the spinneret on the second component melt discharge hole annular distribution circles merge at the position of the spinneret spinneret orifice opened on the side of the spinneret facing downward;The melt distribution holes include a first component melt guide hole of the melt distribution plate opened on the melt distribution plate corresponding to the area of ​​the left collecting cavity of the melt distribution plate, a second component melt guide hole of the melt distribution plate opened on the melt distribution plate corresponding to the area of ​​the right collecting cavity of the melt distribution plate, a first component melt annular guide groove and a second component melt annular guide groove which are opened around the downward side of the melt distribution plate and from the periphery of the melt distribution plate to the center to form a first component melt annular distribution circle of the melt distribution plate and a second component melt annular distribution circle of the melt distribution plate. The upper part of the first component melt guide hole of the melt distribution plate is communicated with the left collecting cavity of the melt distribution plate, and the lower part corresponds to and communicates with the first component melt annular guide groove, and the first component melt annular guide groove corresponds to and communicates with the first component melt outlet hole of the spinneret, and the second component melt distribution plate The upper part of the melt guide hole is communicated with the right collecting cavity of the melt distribution plate, and the lower part corresponds to and communicates with the second component melt annular guide groove, and the second component melt annular guide groove corresponds to and communicates with the second component melt outlet hole of the spinneret, wherein the first component melt annular guide groove and the second component melt annular guide groove form a one-to-one positional relationship with each other; a first component melt introduction hole and a second component melt introduction hole are provided on the cylinder cover, the left end of the first component melt introduction hole is communicated with the first component melt filtering mechanism, and the right end port of the first component melt introduction hole of the first component melt introduction hole is located on the right side of the cylinder cover and communicated with the outside, the left end of the second component melt introduction hole is communicated with the second component melt filtering mechanism, and the right end port of the second component melt introduction hole of the second component melt introduction hole is located on the right side of the cylinder cover and also communicated with the outside. ;

[0007] In a specific embodiment of the present invention, a spinneret support is formed at the bottom of the cylinder, around the four sides of the cylinder and facing the side of the cylinder cavity, a spinneret support sealing ring is arranged on the spinneret support, and a spinneret cavity is formed on the edge of the spinneret and facing downward, and the spinneret support cavity is supported on the spinneret support via the spinneret support sealing ring.

[0008] In another specific embodiment of the present invention, spinneret screw holes are provided at intervals from left to right on the spinneret and in the middle area of ​​the spinneret, and melt distribution plate fixing screw holes are provided in the middle area of ​​the downward side of the melt distribution plate and at positions corresponding to the spinneret screw holes, and the melt distribution plate fixing screws are passed through the spinneret screw holes from the bottom of the spinneret to the top and screwed into the melt distribution plate fixing screw holes to fix the melt distribution plate to the spinneret.

[0009] In another specific embodiment of the present invention, the spinneret has three annular distribution rings for the first component melt outlet holes and three annular distribution rings for the second component melt outlet holes; the spinneret has three annular guide grooves for the first component melt and three annular guide grooves for the second component melt.

[0010] In yet another specific embodiment of the present invention, the barrel cavity, the spinneret, the melt distribution plate and the double-cavity filter barrel are elliptical in shape.

[0011] In another specific embodiment of the present invention, a left support plate support ring is formed at the bottom of the left filter chamber wall of the left filter chamber, surrounding the left filter chamber wall and facing the left filter chamber; the first component melt filtering mechanism includes a left gland, a left upper filter screen, a left filter sand layer, a left lower filter screen and a left support plate, the left support plate is supported on the left support plate support ring, and a left support plate material guide hole is provided on the left support plate in an interval state, which passes through the upper side of the left support plate to the lower side, and the left support plate material guide hole is communicated with the left collecting cavity of the melt distribution plate, the left lower filter screen is laid on the left support plate, the left filter sand layer is laid on the left lower filter screen, the left upper filter screen is arranged on the left filter sand layer, the left gland is covered on the left upper filter screen, and a left gland first component melt feed hole is provided in the central position of the left gland, which passes through the thickness direction of the left gland, and the left end of the first component melt introduction hole provided on the cylinder cover is connected to the left gland first component melt feed hole. The holes correspond to and are connected with each other; a right support plate support ring is formed at the bottom of the right filter chamber wall of the right filter chamber, surrounding the right filter chamber wall and facing the right filter chamber; the second component melt filtration mechanism includes a right gland, a right upper filter screen, a right filter sand layer, a right lower filter screen and a right support plate, the right support plate is supported on the right support plate support ring, and a right support plate guide hole is opened on the right support plate in an interval state from the upper side of the right support plate to the lower side. The material guide hole of the right support plate is communicated with the right collecting cavity of the melt distribution plate, the lower right filter screen is laid on the right support plate, the right filter sand layer is laid on the lower right filter screen, the upper right filter screen is arranged on the right filter sand layer, the right gland is placed on the upper right filter screen, and a right gland second component melt feed hole is provided in the central position of the right gland and runs through the thickness direction of the right gland. The left end of the second component melt introduction hole provided on the cylinder cover corresponds to and is communicated with the second component melt feed hole of the right gland.

[0012] In a more specific embodiment of the present invention, a left gland sealing ring groove is formed between the peripheral edge portion of the left gland and the cavity wall of the left filter cavity, and a left gland sealing ring is embedded in the left gland sealing ring groove; a right gland sealing ring groove is formed between the peripheral edge portion of the right gland and the cavity wall of the right filter cavity, and a right gland sealing ring is embedded in the right gland sealing ring groove.

[0013] In a further specific embodiment of the present invention, a left sealing ring of the cylinder cover is provided on the downward side of the cylinder cover and at a position corresponding to the left end of the first component melt introduction hole and the first component melt feeding hole of the left pressure cap, and a right sealing ring of the cylinder cover is provided on the downward side of the cylinder cover and at a position corresponding to the left end of the second component melt introduction hole and the second component melt feeding hole of the right pressure cap.

[0014] In yet another specific embodiment of the present invention, a sealing gasket for the right end port of the first component melt introduction hole is embedded on the cylinder cover and at a position corresponding to the right end port of the first component melt introduction hole, and a sealing gasket for the right end port of the second component melt introduction hole is embedded at a position corresponding to the right end port of the second component melt introduction hole.

[0015] In yet another specific embodiment of the present invention, a cylinder bolt hole is opened on the upper surface of the cylinder, and a cylinder cover fixing bolt is provided on the cylinder cover and at a position corresponding to the cylinder bolt hole, and the cylinder cover fixing bolt is screwed into the cylinder bolt hole.

[0016] The technical effect provided by the present invention is that: since the first component melt discharge hole of the spinneret and the second component melt discharge hole of the spinneret of the structural system of the spinneret capillary spinneret holes opened on the spinneret are merged at the position of the spinneret spinneret orifice opened on the downward side of the spinneret, it is helpful for the two melts to be extruded and expanded at the spinneret orifice, so as to always ensure the uniformity of the amount of the two melts and ensure the quality of the two-component fiber; since the first component melt introduction hole and the second component melt introduction hole for respectively introducing the first component melt and the second component melt into the first component melt filtering mechanism and the second component melt filtering mechanism are respectively opened on the cylinder cover, and since the right end port of the first component melt introduction hole and the right end port of the second component melt introduction hole are formed on the right side of the cylinder cover, they can be conveniently connected to the spinning box without using pipelines, so as to significantly reduce the probability of melt leakage; since the feed distribution plate with a connecting pipe in the prior art is abandoned, the height can be significantly reduced, which is convenient for maintenance and the structure can be simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 sectional view of .

[0019] Figure 3 for Figure 1 and Figure 2 Schematic diagram of the bottom of the melt distribution plate shown.

[0020] Figure 4 It is a schematic diagram of the cooperation between the present invention and the spinning box. DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments is not a limitation of the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0022] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on Figure 1 In addition, it should be noted that the word "sand" in this application can also be replaced by "sand", because these two words are commonly used in the industry and have long become conventional words that will not cause misunderstanding.

[0023] See also Figures 1 to 3 , showing a barrel 1 with an outer rectangular shape; showing a spinneret 2, which is arranged at the bottom of the barrel cavity 11 of the barrel 1, and the spinneret capillary spinneret hole 21 is opened on the spinneret 2; showing a melt distribution plate 3, which is superimposed on the above-mentioned spinneret 2 and fixed to the spinneret 2, and the melt distribution plate 3 is opened on the melt distribution plate 3, and the melt distribution hole 31 is communicated with the above-mentioned spinneret capillary spinneret hole 21, and a melt distribution plate left collection cavity 33 and a melt distribution plate right collection cavity 34 are formed on the upper side of the melt distribution plate 3, and the melt distribution plate left collection cavity 33 and the melt distribution plate right collection cavity 34 are connected to the above-mentioned melt distribution hole 3 1; a double-cavity filter cartridge 4 is shown, which is arranged at the upper part of the aforementioned barrel cavity 11, and the double-cavity filter cartridge 4 has a left filter cavity 41 and a right filter cavity 42 separated from each other, a first component melt filtering mechanism 411 is arranged in the left filter cavity 41, and a second component melt filtering mechanism 421 is arranged in the right filter cavity 42, the first component melt filtering mechanism 411 corresponds to and communicates with the aforementioned left collection cavity 33 of the melt distribution plate, and the second component melt filtering mechanism 421 corresponds to and communicates with the aforementioned right collection cavity 34 of the melt distribution plate; a barrel cover 5, the barrel cover 5 is fixed to the top surface of the aforementioned barrel 1 at a position corresponding to the upper side of the aforementioned double-cavity filter cartridge 4.

[0024] The technical key points of the technical solution provided by the present invention are as follows: the aforementioned spinneret capillary spinneret hole 21 includes a spinneret first component melt discharge hole 211 and a spinneret second component melt discharge hole 212 which are arranged around the aforementioned spinneret 2 and from the outer periphery of the spinneret 2 to the center of the spinneret 2 to form a concentric spinneret first component melt discharge hole annular distribution circle and a spinneret second component melt discharge hole annular distribution circle, wherein the aforementioned first component melt discharge hole annular distribution circle and the aforementioned second component melt discharge hole annular distribution circle form a one-to-one positional relationship with each other, and the aforementioned spinneret first component melt discharge hole 211 on two adjacent aforementioned first component melt discharge hole annular distribution circles are spaced apart from each other. The aforementioned spinneret second component melt discharge hole 212 on the annular distribution circle of the second component melt discharge hole merges at the position of the spinneret spinneret orifice 213 opened on the downward side of the spinneret 2; the aforementioned melt distribution hole 31 includes a melt distribution plate first component melt guide hole 311 opened on the melt distribution plate 3 in an area corresponding to the aforementioned melt distribution plate left collection cavity 33, and a melt distribution plate second component melt guide hole 312 opened on the melt distribution plate 3 in an area corresponding to the aforementioned melt distribution plate right collection cavity 34, surrounding the four sides of the downward side of the melt distribution plate 3 and from the periphery of the melt distribution plate 3 to the center to form an annular distribution circle of the first component melt of the melt distribution plate and an annular distribution circle of the second component melt of the melt distribution plate The first component melt annular guide groove 313 and the second component melt annular guide groove 314 are opened in the state of the distribution circle, the upper part of the first component melt guide hole 311 of the melt distribution plate is communicated with the left collection cavity 33 of the melt distribution plate, and the lower part corresponds to and communicates with the first component melt annular guide groove 313, and the first component melt annular guide groove 313 corresponds to and communicates with the first component melt discharge hole 211 of the aforementioned spinneret, the upper part of the second component melt guide hole 312 of the melt distribution plate is communicated with the right collection cavity 34 of the melt distribution plate, and the lower part corresponds to and communicates with the second component melt annular guide groove 314, and the second component melt annular guide groove 314 corresponds to and communicates with the second component melt discharge hole 212 of the aforementioned spinneret, which In the embodiment, the first component melt annular guide groove 313 and the second component melt annular guide groove 314 form a one-to-one positional relationship with each other; a first component melt introduction hole 51 and a second component melt introduction hole 52 are provided on the aforementioned barrel cover 5, the left end of the first component melt introduction hole 51 is communicated with the aforementioned first component melt filtering mechanism 411, and the first component melt introduction hole right end port 511 of the first component melt introduction hole 51 is located on the right side of the barrel cover 5 and communicated with the outside, the left end of the second component melt introduction hole 52 is communicated with the aforementioned second component melt filtering mechanism 421, and the second component melt introduction hole right end port 521 of the second component melt introduction hole 52 is located on the right side of the barrel cover 5 and also communicated with the outside.

[0025] See the key points Figure 1 and Figure 2 A spinneret support 12 (also called "spinneret support foot") is formed at the bottom of the aforementioned cylinder 1, surrounding the cylinder 1 and facing the side of the aforementioned cylinder cavity 11. A spinneret support sealing ring 121 is arranged on the spinneret support 12. A spinneret cavity 22 is formed at the edge of the aforementioned spinneret 2 and facing downward. The spinneret support cavity 22 is supported on the spinneret support 12 via the spinneret support sealing ring 121, that is, the spinneret support cavity 22 is supported on the spinneret support sealing ring 121. In other words, the spinneret support cavity 22 is supported on the spinneret support sealing ring 121.

[0026] On the aforementioned spinneret 2 and in the middle area of ​​the spinneret 2, spinneret screw holes 23 are provided at intervals from left to right, and in the middle area of ​​the downward side of the aforementioned melt distribution plate 3 and at the position corresponding to the spinneret screw hole 23, a melt distribution plate fixing screw hole 35 is provided, and the melt distribution plate 3 is fixed to the spinneret 2 by a melt distribution plate fixing screw 351 that passes through the spinneret screw hole 23 from the bottom of the spinneret 2 upward and is screwed into the melt distribution plate fixing screw hole 35.

[0027] Depend on Figure 1 and Figure 3 As shown, the aforementioned spinneret first component melt outlet hole annular distribution rings and the spinneret second component melt outlet hole annular distribution rings are three each, that is, three circles each; the aforementioned first component melt annular guide grooves 313 and second component melt annular guide grooves 314 are three each, that is, three channels each.

[0028] In this embodiment, the shapes of the barrel cavity 11, the spinneret 2, the melt distribution plate 3 and the double-cavity filter barrel 4 are all elliptical.

[0029] See you next time Figure 1 and Figure 2A left support plate support ring 412 is formed at the bottom of the left filter chamber wall of the aforementioned left filter chamber 41, around the left filter chamber wall and toward the left filter chamber 41; the aforementioned first component melt filtering mechanism 411 includes a left gland 4111, a left upper filter screen 4112, a left filter sand layer 4113, a left lower filter screen 4114 and a left support plate 4115, the left support plate 4115 is supported on the left support plate support ring 412, and a left support plate material guide hole 41151 is opened in an interval state from the left support plate 4115 facing upward to the left support plate 4115 facing downward. 151 is communicated with the left collecting cavity 33 of the aforementioned melt distribution plate, the lower left filter screen 4114 is laid on the left support plate 4115, the left filter sand layer 4113 is laid on the lower left filter screen 4114, the upper left filter screen 4112 is arranged on the left filter sand layer 4113, the left gland 4111 is covered on the upper left filter screen 4112, and a left gland first component melt feed hole 41111 is provided at the central position of the left gland 4111 and runs through the thickness direction of the left gland 4111, and the left end of the aforementioned first component melt introduction hole 51 provided on the aforementioned cylinder cover 5 corresponds to and communicates with the left gland first component melt feed hole 41111.

[0030] A right support plate support ring 413 is formed at the bottom of the right filter chamber wall of the aforementioned right filter chamber 42, around the right filter chamber wall and toward the right filter chamber 42; the aforementioned second component melt filtering mechanism 421 includes a right pressure cover 4211, a right upper filter screen 4212, a right filter sand layer 4213, a right lower filter screen 4214 and a right support plate 4215, the right support plate 4215 is supported on the right support plate support ring 413, and a right support plate material guide hole 42151 is opened in an interval state from the upper side of the right support plate 4215 to the lower side. 51 is communicated with the right collecting cavity 34 of the aforementioned melt distribution plate, the lower right filter screen 4214 is laid on the right supporting plate 4215, the right filter sand layer 4213 is laid on the lower right filter screen 4214, the upper right filter screen 4212 is arranged on the right filter sand layer 4213, the right pressure cover 4211 is placed on the upper right filter screen 4212, and a right pressure cover second component melt feed hole 42111 is provided at the central position of the right pressure cover 4211 and runs through the thickness direction of the right pressure cover 4211, the left end of the aforementioned second component melt introduction hole 52 provided on the aforementioned cylinder cover 5 corresponds to and is communicated with the second component melt feed hole 42111 of the right pressure cover.

[0031] Please see the key Figure 1 And combined with Figure 2A left gland sealing ring groove 41112 is formed between the surrounding edge portion of the aforementioned left gland 4111 and the cavity wall of the aforementioned left filter cavity 41, and a left gland sealing ring 41113 is embedded in the left gland sealing ring groove 41112; a right gland sealing ring groove 42112 is formed between the surrounding edge portion of the aforementioned right gland 4211 and the cavity wall of the aforementioned right filter cavity 42, and a right gland sealing ring 42113 is embedded in the right gland sealing ring groove 42112.

[0032] A left sealing ring 53a of the cylinder cover is arranged on the downward side of the cylinder cover 5 and at a position corresponding to the left end of the first component melt introduction hole 51 and the first component melt feeding hole 41111 of the left pressure cap, while a right sealing ring 53b of the cylinder cover is arranged on the downward side of the cylinder cover 5 and at a position corresponding to the left end of the second component melt introduction hole 52 and the second component melt feeding hole 42111 of the right pressure cap.

[0033] Preferably, a first component melt introduction hole right end port sealing gasket 54a is embedded on the aforementioned cylinder cover 5 and at a position corresponding to the aforementioned first component melt introduction hole right end port 511, and a second component melt introduction hole right end port sealing gasket 54b is embedded at a position corresponding to the aforementioned second component melt introduction hole right end port 521.

[0034] A cylinder bolt hole 13 is opened on the upper surface of the aforementioned cylinder 1, and a cylinder cover fixing bolt 55 is arranged on the aforementioned cylinder cover 5 and at a position corresponding to the cylinder bolt hole 13. The cylinder cover fixing bolt 55 is screwed into the cylinder bolt hole 13, so that the cylinder cover 5 is fixed to the cylinder 1 at a position corresponding to the upper side of the double-chamber filter cylinder 4.

[0035] See also Figure 4 And combined with Figures 1 to 3 ,exist Figure 4 A spinning manifold 6 and a barrel outer box 7 are shown in the figure. The spinning manifold 6 is located on the right side of the barrel 1 of the present invention, and the first box outlet Ⅰ61 and the second box outlet (not shown in the figure) of the spinning manifold 6 are respectively sealed and connected with the sealing gasket 54a at the right end of the first component melt introduction hole, and Figure 4 The second discharge port of the spinning manifold 6 (not shown) is sealed and butted with the sealing gasket 54b at the right end of the second component melt introduction hole. The barrel 1 of the present invention together with the double-cavity filter barrel 4 is arranged in the barrel outer box cavity 71 of the barrel outer box 7 (i.e., "insulation box", the same below), and is tightened by the tightening bolt 72 arranged on the left box wall of the barrel outer box 7. In addition, the insulation layer 711 and the barrel outer box cover 712 are arranged in sequence from bottom to top in the barrel outer box cavity 71 and at the position corresponding to the upper part of the barrel cover 5.

[0036] The first component melt, for example, high molecular weight polylactic acid melt, is introduced from the first discharge port Ⅰ61 of the box body to the first component melt introduction hole 51 through the center hole of the sealing gasket 54a at the right end of the first component melt introduction hole and the right end port 511 of the first component melt introduction hole, and then enters the aforementioned left collecting cavity 33 of the melt distribution plate through the left end of the first component melt introduction hole, the left pressure cover first component melt feed hole 41111, the upper left filter screen 4112, the left filter sand layer 4113, the lower left filter screen 4114 and the left support plate guide hole 41151 in sequence. At the same time, the second component melt, such as low molecular weight polylactic acid melt, is introduced from the second discharge port of the box body to the second component melt introduction hole 52 through the center hole of the sealing ring 54b at the right end of the second component melt introduction hole and the right end port 521 of the second component melt introduction hole, and then enters the aforementioned right collecting cavity 34 of the melt distribution plate through the left end of the second component melt introduction hole, the right pressure cover second component melt feed hole 42111, the upper right filter screen 4212, the right filter sand layer 4213, the lower right filter screen 4214 and the right support plate guide hole 42151.

[0037] The first component melt entering the left collecting cavity 33 of the melt distribution plate enters the first component melt outlet hole 211 of the spinneret through the first component melt guide hole 311 and the first component melt annular guide groove 313 of the melt distribution plate in turn; and the second component melt in the right collecting cavity 34 of the melt distribution plate enters the second component melt outlet hole 212 of the spinneret through the second component melt guide hole 312 and the second component melt annular guide groove 314 of the melt distribution plate in turn. The first component melt and the second component melt in the first component melt outlet hole 211 and the second component melt outlet hole 212 of the spinneret converge at the position of the spinneret nozzle 213 and are ejected and expanded.

[0038] In summary, the technical solution provided by the present invention makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A two-component composite fiber spinning assembly, comprising a barrel (1); a spinneret (2), the spinneret (2) being arranged at the bottom of the barrel cavity (11) of the barrel (1), the spinneret (2) being provided with a spinneret capillary spinneret hole (21); a melt distribution plate (3), the melt distribution plate (3) being stacked on top of the spinneret (2) and fixed to the spinneret (2), the melt distribution plate (3) being provided with a melt distribution hole (31), the melt distribution hole (31) being communicated with the spinneret capillary spinneret hole (21), and a melt distribution plate left feed cavity (33) and a melt distribution plate right feed cavity (34) being formed on the upper side of the melt distribution plate (3), the melt distribution plate left feed cavity (33) and the melt distribution plate right feed cavity (34) being connected with the melt distribution hole (31). 1); a double-chamber filter cartridge (4), the double-chamber filter cartridge (4) is arranged at the upper part of the barrel cavity (11), and the double-chamber filter cartridge (4) has a left filter chamber (41) and a right filter chamber (42) separated from each other, a first component melt filtering mechanism (411) is arranged in the left filter chamber (41), and a second component melt filtering mechanism (421) is arranged in the right filter chamber (42), the first component melt filtering mechanism (411) corresponds to and communicates with the left collecting chamber (33) of the melt distribution plate, and the second component melt filtering mechanism (421) corresponds to and communicates with the right collecting chamber (34) of the melt distribution plate; a barrel cover (5), the barrel cover (5) is fixed to the top surface of the barrel (1) at a position corresponding to the upper side of the double-chamber filter cartridge (4); characterized in that The spinneret capillary spinneret hole (21) includes a spinneret first component melt discharge hole (211) and a spinneret second component melt discharge hole (212) which are arranged around the spinneret (2) and from the periphery of the spinneret (2) to the center of the spinneret (2) to form a concentric spinneret first component melt discharge hole annular distribution circle and a spinneret second component melt discharge hole annular distribution circle, wherein the first component melt discharge hole annular distribution circle and the second component melt discharge hole annular distribution circle form a one-to-one positional relationship with each other, and two adjacent first component melt discharge holes are arranged at intervals. The first component melt discharge hole (211) of the spinneret on the annular distribution circle of the melt discharge hole and the second component melt discharge hole (212) of the spinneret on the annular distribution circle of the melt discharge hole merge at the position of the spinneret spinneret orifice (213) opened on the downward side of the spinneret (2); the melt distribution hole (31) includes a melt distribution plate first component melt guide hole (311) opened on the melt distribution plate (3) in an area corresponding to the left collecting cavity (33) of the melt distribution plate, and a melt distribution plate second component melt guide hole (311) opened on the melt distribution plate (3) in an area corresponding to the right collecting cavity (34) of the melt distribution plate. ), a first component melt annular guide groove (313) and a second component melt annular guide groove (314) are formed around the melt distribution plate (3) on the downward side and from the periphery of the melt distribution plate (3) to the center to form a first component melt annular distribution circle of the melt distribution plate and a second component melt annular distribution circle of the melt distribution plate. The upper part of the first component melt guide hole (311) of the melt distribution plate is communicated with the left material collecting cavity (33) of the melt distribution plate, and the lower part corresponds to and communicates with the first component melt annular guide groove (313), and The first component melt annular guide groove (313) corresponds to and communicates with the first component melt outlet hole (211) of the spinneret, the upper part of the second component melt guide hole (312) of the melt distribution plate is communicated with the right material collecting cavity (34) of the melt distribution plate, and the lower part corresponds to and communicates with the second component melt annular guide groove (314), and the second component melt annular guide groove (314) corresponds to and communicates with the second component melt outlet hole (212) of the spinneret, wherein the first component melt annular guide groove (313) and the second component melt annular guide groove (314) form a one-to-one positional relationship with each other;The cylinder cover (5) is provided with a first component melt introduction hole (51) and a second component melt introduction hole (52), the left end of the first component melt introduction hole (51) is communicated with the first component melt filtering mechanism (411), and the first component melt introduction hole right end port (511) of the first component melt introduction hole (51) is located on the right side of the cylinder cover (5) and communicated with the outside, the left end of the second component melt introduction hole (52) is communicated with the second component melt filtering mechanism (421), and the second component melt introduction hole right end port (521) of the second component melt introduction hole (52) is located on the right side of the cylinder cover (5) and also communicated with the outside.; 2. The bicomponent composite fiber spinning assembly according to claim 1, characterized in that A spinneret support (12) is formed at the bottom of the barrel (1) around the barrel (1) and on one side facing the barrel cavity (11); a spinneret support sealing ring (121) is arranged on the spinneret support (12); a spinneret cavity (22) is formed at the edge of the spinneret (2) and on the side facing downward; the spinneret support cavity (22) is supported on the spinneret support (12) via the spinneret support sealing ring (121).

3. The bicomponent composite fiber spinning assembly according to claim 1, characterized in that A spinneret screw hole (23) is provided on the spinneret (2) and in a middle area of ​​the spinneret (2) at intervals from left to right, and a melt distribution plate fixing screw hole (35) is provided in a middle area of ​​the downward side of the melt distribution plate (3) and at a position corresponding to the spinneret screw hole (23). The melt distribution plate fixing screw (351) passes through the spinneret screw hole (23) from the bottom of the spinneret (2) to the top and is screwed into the melt distribution plate fixing screw hole (35) to fix the melt distribution plate (3) to the spinneret (2).

4. The bicomponent composite fiber spinning assembly according to claim 1, characterized in that The spinneret has three annular distribution rings for the first component melt outlet holes and three annular distribution rings for the second component melt outlet holes; the first component melt annular guide grooves (313) and the second component melt annular guide grooves (314) are three each.

5. The bicomponent composite fiber spinning assembly according to claim 1, characterized in that The barrel cavity (11), the spinneret (2), the melt distribution plate (3) and the double-cavity filter barrel (4) are elliptical in shape.

6. The bicomponent composite fiber spinning assembly according to claim 1, characterized in that A left support plate support ring (412) is formed at the bottom of the left filter chamber wall of the left filter chamber (41) around the left filter chamber wall and in the direction of the left filter chamber (41); the first component melt filtering mechanism (411) comprises a left pressure cover (4111), a left upper filter screen (4112), a left filter sand layer (4113), a left lower filter screen (4114) and a left support plate (4115); the left support plate (4115) is supported on the left support plate support ring (412); a left support plate material guide hole (41151) is provided on the left support plate (4115) in an interval state and passes through from the upper side of the left support plate (4115) to the lower side; the left support plate material guide hole (41151) is provided on the left support plate (4115) 1) communicated with the left collecting cavity (33) of the melt distribution plate, a lower left filter screen (4114) is laid on the left supporting plate (4115), a left filter sand layer (4113) is laid on the lower left filter screen (4114), an upper left filter screen (4112) is arranged on the left filter sand layer (4113), a left gland (4111) is placed on the upper left filter screen (4112), and a left gland first component melt feed hole (41111) is provided at the central position of the left gland (4111) and runs through the thickness direction of the left gland (4111), and the left end of the first component melt introduction hole (51) provided on the cylinder cover (5) corresponds to and communicates with the left gland first component melt feed hole (41111); A right support plate support ring (413) is formed at the bottom of the right filter chamber wall of the right filter chamber (42) around the right filter chamber wall and in the direction of the right filter chamber (42); the second component melt filtering mechanism (421) comprises a right pressure cover (4211), a right upper filter screen (4212), a right filter sand layer (4213), a right lower filter screen (4214) and a right support plate (4215); the right support plate (4215) is supported on the right support plate support ring (413); a right support plate material guide hole (42151) is provided on the right support plate (4215) in an interval state and passes through from the upper side of the right support plate (4215) to the lower side; the right support plate material guide hole (42151) 1) It is connected to the right collecting cavity (34) of the melt distribution plate, the lower right filter screen (4214) is laid on the right supporting plate (4215), the right filter sand layer (4213) is laid on the lower right filter screen (4214), the upper right filter screen (4212) is arranged on the right filter sand layer (4213), the right pressure cover (4211) is placed on the upper right filter screen (4212), and a right pressure cover second component melt feed hole (42111) is provided at the central position of the right pressure cover (4211) and runs through the thickness direction of the right pressure cover (4211), and the left end of the second component melt introduction hole (52) provided on the cylinder cover (5) corresponds to and is connected to the second component melt feed hole (42111) of the right pressure cover.

7. The bicomponent composite fiber spinning assembly according to claim 6, characterized in that A left gland sealing ring groove (41112) is formed between the peripheral edge of the left gland (4111) and the cavity wall of the left filter cavity (41), and a left gland sealing ring (41113) is embedded in the left gland sealing ring groove (41112); a right gland sealing ring groove (42112) is formed between the peripheral edge of the right gland (4211) and the cavity wall of the right filter cavity (42), and a right gland sealing ring (42113) is embedded in the right gland sealing ring groove (42112).

8. The bicomponent composite fiber spinning assembly according to claim 6, characterized in that A left sealing ring (53a) of the cylinder cover is provided on the downward side of the cylinder cover (5) and at a position corresponding to the left end of the first component melt introduction hole (51) and the first component melt feeding hole (41111) of the left pressure cover, while a right sealing ring (53b) of the cylinder cover is provided on the downward side of the cylinder cover (5) and at a position corresponding to the left end of the second component melt introduction hole (52) and the second component melt feeding hole (42111) of the right pressure cover.

9. The bicomponent composite fiber spinning assembly according to claim 1, characterized in that A first component melt introduction hole right end port sealing gasket (54a) is embedded on the cylinder cover (5) at a position corresponding to the first component melt introduction hole right end port (511), and a second component melt introduction hole right end port sealing gasket (54b) is embedded at a position corresponding to the second component melt introduction hole right end port (521).

10. The bicomponent composite fiber spinning assembly according to claim 1, characterized in that A cylinder bolt hole (13) is provided on the upper surface of the cylinder (1), and a cylinder cover fixing bolt (55) is provided on the cylinder cover (5) at a position corresponding to the cylinder bolt hole (13). The cylinder cover fixing bolt (55) is screwed into the cylinder bolt hole (13).

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