Anti-dripping flame-retardant polyester fiber and production device thereof

Abstract

The invention discloses an anti-dripping flame-retardant polyester fiber with seeds and a production device thereof, belongs to the technical field of polyester fibers, and solves the problems that a spinning plate is easy to block, high in replacement frequency and high in production cost in the prior art, the anti-dripping flame-retardant polyester fiber comprises a spinning assembly, the spinning assembly comprises a shell, a sealing plate is arranged on the upper portion of the inner side of the shell, and the spinning plate is arranged on the lower portion of the inner side of the shell; a filter unit is arranged between the spinning plate and the sealing plate, the shell comprises an upper half shell and a lower half shell, a limiting ring is arranged on the lower portion of the inner side of the lower half shell, a first step groove is formed in the outer wall of the spinning plate, and the first step groove is erected on the limiting ring in a matched mode. By designing the spinning assembly which can be rapidly and conveniently detached, the detaching and cleaning efficiency of the spinning plate is improved, so that the spinning requirement of polyester fibers can still be met under the condition that the inventory of the spinning plate is reduced, and it is ensured that when a melt contains more compounds such as a melt drop resisting agent, the melt drop resisting agent can still be removed. The spinning assembly can complete spinning operation with a high standard.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyester fibers, and more particularly, relates to a melt-drop resistant and flame-retardant polyester fiber and its production device. Background Art

[0002] Polyester fibers have advantages such as high modulus, high strength, high elasticity, good shape retention, and heat resistance, and have become the fiber variety with the widest use and the largest consumption.

[0003] In the existing related technologies, in order to manufacture flame-retardant and melt-drop resistant polyester fibers to prevent polyester fibers from melting and dripping during combustion or high temperature, which may cause burns and the spread of fire caused by the migration of fire sources, flame-retardant materials are usually introduced, such as adding compounds containing chlorine, bromine, phosphorus, antimony, melt-drop inhibitors, etc., to produce blended or copolymerized flame-retardant and melt-drop resistant polyester, so as to reduce the flammability and melt-drop resistance of the fibers.

[0004] When adding a large amount of compounds such as melt-drop inhibitors, the existing spinnerets are prone to blockage, and the replacement frequency of the spinnerets needs to be increased. However, the existing spinnerets are difficult to disassemble, which is difficult to meet the requirement of rapid replacement. And storing too many spinnerets has the disadvantage of high purchase and maintenance costs. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies in the existing technology and provide a melt-drop resistant and flame-retardant polyester fiber and its production device with a spinneret that is not easily blocked, has a reduced replacement frequency, and low production costs.

[0006] To achieve the above technical objectives, the technical solutions adopted by the melt-drop resistant and flame-retardant polyester fiber and its production device of the present invention are as follows: A production device for melt-drop resistant and flame-retardant polyester fibers includes a spinning assembly. The spinning assembly includes a tubular outer shell. An upper sealing plate is provided on the upper inner side of the outer shell, and a spinneret is provided on the lower inner side of the outer shell. A filtering unit is provided between the spinneret and the sealing plate. The outer shell includes an upper half shell and a lower half shell, and the upper half shell and the lower half shell are connected by threads. A limiting ring is provided on the lower inner side of the lower half shell. A first stepped groove is provided on the outer wall of the spinneret, and the first stepped groove is adaptively mounted on the limiting ring. The lower part of the spinneret is located inside the lower half shell, and the upper part of the spinneret is located inside the upper half shell.

[0007] Optionally, the sealing plate and the upper half shell are connected by threads. A threaded hole is provided at the top of the sealing plate, and the threaded hole is used for screwing and unscrewing a lifting rod.

[0008] Optionally, a melt inlet is provided on the outer wall of the upper half shell, and the melt inlet is located between the sealing plate and the filtering unit. The filtering unit includes a diversion plate, a housing, and a filter screen. The diversion plate is erected at the top opening of the housing. A confluence hole is provided at the top of the diversion plate, and a plurality of diversion holes are provided at the bottom. A melt cavity is provided inside the diversion plate. The top of the melt cavity is communicated with the confluence hole, and the bottom of the melt cavity is communicated with the diversion holes. One filter screen is provided at the upper inner side and the lower inner side of the housing respectively. A sea sand layer is provided between the two filter screens. A plurality of distribution holes are provided at the bottom of the housing.

[0009] Optionally, a second step groove is provided at the lower part of the outer wall of the diversion plate, and the second step groove is adaptively erected on the top of the housing. The top of the diversion plate is concave. The confluence hole is located at the lower position of the top of the diversion plate. The height of the melt cavity gradually decreases from the axis to the surrounding directions.

[0010] Optionally, a distribution groove is provided at the bottom of the housing, and the distribution holes are provided at the bottom of the distribution groove.

[0011] Optionally, the bottom of the diversion plate is located inside the housing. An aluminum ring is provided between the bottom of the diversion plate and the upper filter screen. The inner diameter of the mesh holes of the upper filter screen is larger than that of the lower filter screen.

[0012] Optionally, an upper ring groove is provided on the outer wall of the upper half shell and below the first step groove. A lower ring groove is provided on the outer wall of the lower half shell. A pair of vertical grooves are provided at the lower part of the outer shell. One end of the vertical groove is communicated with the upper ring groove, and the other end of the vertical groove is communicated with the lower ring groove. An upper snap ring is sleeved in the upper ring groove, and a lower snap ring is sleeved in the lower ring groove. A locking strip is provided in the vertical groove. One end of the locking strip presses on the outer wall of the upper snap ring, and the other end of the locking strip presses on the outer wall of the lower snap ring. The locking strip is locked with the upper snap ring and the lower snap ring by bolts respectively.

[0013] Optionally, the upper ring groove, the lower ring groove, and the vertical groove have the same depth. Two cushion blocks are provided between the locking strip and the bottom of the vertical groove, and the cushion blocks can expand when heated.

[0014] Optionally, a pair of disassembly holes are provided at the bottom of the lower half shell, and the disassembly holes are arc-shaped waist holes.

[0015] In a second aspect, the present application provides a melt-drop resistant and flame-retardant polyester fiber, adopting the following technical solution: An anti-droplet flame-retardant polyester fiber is prepared by using an anti-droplet flame-retardant polyester fiber production device.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By designing a spinning component that can be quickly and conveniently disassembled, the present invention improves the disassembly and cleaning efficiency of the spinneret plate. Therefore, even when the inventory of the spinneret plate is reduced, the spinning requirements of polyester fibers can still be met, ensuring that when the melt contains a large amount of anti-droplet agents and other compounds, the spinning component can complete the spinning operation to a high standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structure of the present invention Figure 1 ; Figure 2 is a schematic structure of the present invention Figure 2 ; Figure 3 is a cross-sectional view of the internal structure of the present invention; Figure 4 is an exploded state reference diagram of the filtering unit in the present invention.

[0018] In the figure: 1, spinning component; 11, outer shell; 111, upper half shell; 1111, melt inlet; 1112, upper annular groove; 1113, upper snap ring; 112, lower half shell; 1121, limiting ring; 1122, lower annular groove; 1123, lower snap ring; 1124, disassembly hole; 113, vertical groove; 114, locking strip; 1141, bolt; 1142, cushion block; 12, sealing plate; 120, threaded hole; 13, spinneret plate; 130, first stepped groove; 14, filtering unit; 141, flow guide plate; 1411, confluence hole; 1412, shunt hole; 1413, melt cavity; 1414, second stepped groove; 142, accommodating shell; 1421, distribution hole; 1422, distribution groove; 143, filter net; 144, sea sand layer; 145, aluminum ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present invention will be further described below in conjunction with the drawings and specific embodiments: As Figure 1 — Figure 4As shown, a production device for a kind of anti-droplet flame-retardant polyester fiber includes a spinning component 1. The spinning component 1 includes a tubular outer shell 11. An upper inner part of the outer shell 11 is provided with a sealing plate 12, and a lower inner part of the outer shell 11 is provided with a spinneret plate 13. A filtering unit 14 is arranged between the spinneret plate 13 and the sealing plate 12. The outer shell 11 includes an upper half shell 111 and a lower half shell 112, and the upper half shell 111 and the lower half shell 112 are connected by threads; A limiting ring 1121 is arranged at a lower inner part of the lower half shell 112. A first step groove 130 is arranged on an outer wall of the spinneret plate 13, and the first step groove 130 is adaptively mounted on the limiting ring 1121; A lower part of the spinneret plate 13 is located inside the lower half shell 112, and an upper part of the spinneret plate 13 is located inside the upper half shell 111.

[0020] When assembling the spinning component 1, first place the spinneret plate 13 into the lower half shell 112 from top to bottom. Under the cooperation of the limiting ring 1121 and the first step groove 130, the spinneret plate 13 will not fall out of the lower half shell 112. Then screw the upper half shell 111 and the lower half shell 112 together. Next, place the filtering unit 14 into the upper half shell 111 from top to bottom and make it contact with the spinneret plate 13. Finally, screw the sealing plate 12 into the upper half shell 111 from top to bottom to achieve the rapid installation of the spinning component 1. When it is necessary to disassemble the spinning component 1, only need to unscrew the upper half shell 111 and the lower half shell 112, and then the spinneret plate 13 can be quickly taken out, so that the spinneret plate 13 can be timely sent to the cleaning place without reverse operation of the installation sequence, greatly improving the disassembly and recycling efficiency of the spinneret plate 13, and further ensuring that the spinning process can be carried out reliably.

[0021] The sealing plate 12 and the upper half shell 111 are connected by threads. A threaded hole 120 is arranged at the top of the sealing plate 12, and the threaded hole 120 is used for screwing and unscrewing a lifting rod. After the lower half shell 112 is separated from the spinning component 1, screw the lifting rod into the threaded hole 120, and then the upper half shell 111 and the sealing plate 12 can be lifted, so that the filtering unit 14 can automatically fall out of the upper half shell 111, improving the separation efficiency of the filtering unit 14 and the upper half shell 111. Finally, only need to unscrew the sealing plate 12 from the upper half shell 111 to complete the disassembly of the spinning component 1.

[0022] An outer wall of the upper half shell 111 is provided with a melt inlet 1111, and the melt inlet 1111 is located between the sealing plate 12 and the filtering unit 14; the filtering unit 14 includes a flow guiding plate 141, a containing shell 142 and a filter net 143. The flow guiding plate 141 is erected at a top opening of the containing shell 142. A converging hole 1411 is provided at a top of the flow guiding plate 141, and a plurality of diverging holes 1412 are provided at a bottom of the flow guiding plate 141. A melt cavity 1413 is provided inside the flow guiding plate 141. A top of the melt cavity 1413 communicates with the converging hole 1411, and a bottom of the melt cavity 1413 communicates with the diverging holes 1412; a filter net 143 is provided at both an upper inner side and a lower inner side of the containing shell 142. A sea sand layer 144 is provided between the two filter nets 143. A plurality of distribution holes 1421 are provided at a bottom of the containing shell 142.

[0023] When the melt enters the upper half shell 111 from the melt inlet 1111, it will first enter the return hole, then gather in the melt cavity 1413, and finally flow out evenly from the diverging holes 1412, ensuring that the melt can pass through the filter net 143 and the sea sand layer 144 in a flat state, thereby improving the filtering effect of the filter net 143 and the sea sand layer 144. Further, filter nets 143 are provided at both a top and a bottom of the sea sand layer 144. On the one hand, it can improve the filtering effect on the melt, and on the other hand, it can play a role in limiting the sea sand layer 144 to prevent the sea sand layer 144 from becoming loose due to the stamping of the melt. When the melt passes through the filtering of the filtering unit 14, it will flow towards the spinning plate 13 through the distribution holes 1421. In this way, it is ensured that the melt with the same pressure flows into each spinning hole on the spinning plate 13, thereby improving the spinning effect.

[0024] A second step groove 1414 is provided at a lower part of an outer wall of the flow guiding plate 141, and the second step groove 1414 is adaptively erected at a top of the containing shell 142; a top of the flow guiding plate 141 is concave, the converging hole 1411 is located at a lower position of the top of the flow guiding plate 141, and a height of the melt cavity 1413 gradually decreases from an axis to a surrounding direction. Under the action of the second step groove 1414, the flow guiding plate 141 can be reliably clamped at the top of the containing shell 142 to realize reliable fixation of the flow guiding plate 141. Further, since the top of the flow guiding plate 141 is concave, it promotes the melt to flow quickly towards the converging hole 1411, thereby shortening the time for the melt to fill the melt cavity 1413, ensuring that the melt pressure in the melt cavity 1413 can rise rapidly, and further increasing the discharge pressure of the melt from the dispersion holes.

[0025] A distribution groove 1422 is provided at the bottom of the accommodation shell 142, and the distribution hole 1421 is provided at the bottom of the distribution groove 1422. The provision of the distribution groove 1422 creates a certain gap between the spinneret plate 13 and the accommodation shell 142, thus ensuring that the melt can enter the spinneret plate 13 evenly.

[0026] The bottom of the flow guide plate 141 is located inside the accommodation shell 142. An aluminum ring 145 is provided between the bottom of the flow guide plate 141 and the upper filter net 143. The inner diameter of the mesh holes of the upper filter net 143 is larger than that of the lower filter net 143. The provision of the aluminum ring 145 plays a role in supporting and positioning the flow guide plate 141, ensuring that the flow guide plate 141 does not directly contact the upper filter net 143, thus ensuring that the melt can reliably pass through the filter net 143. The filtering precision of the upper filter net 143, the sea sand layer 144, and the lower filter net 143 gradually increases, making the filtering effect on the melt more refined.

[0027] An upper ring groove 1112 is provided on the outer wall of the upper half shell 111 and below the first step groove 130. A lower ring groove 1122 is provided on the outer wall of the lower half shell 112. A pair of vertical grooves 113 are provided at the lower part of the outer shell 11. One end of the vertical groove 113 communicates with the upper ring groove 1112, and the other end of the vertical groove 113 communicates with the lower ring groove 1122; An upper snap ring 1113 is sleeved in the upper ring groove 1112, a lower snap ring 1123 is sleeved in the lower ring groove 1122, a locking strip 114 is provided in the vertical groove 113, one end of the locking strip 114 presses on the outer wall of the upper snap ring 1113, and the other end of the locking strip 114 presses on the outer wall of the lower snap ring 1123; The locking strip 114 and the upper snap ring 1113, and the locking strip 114 and the lower snap ring 1123 are both locked by bolts 1141.

[0028] Through the locking action of the locking strip 114 on the upper snap ring 1113 and the lower snap ring 1123, the locking of the upper half shell 111 and the lower half shell 112 is realized, preventing damage to the threaded connection between the upper half shell 111 and the lower half shell 112. That is to say, through the cooperation of the locking strip 114, the upper snap ring 1113, and the lower snap ring 1123, a vertical pulling force is provided for the upper half shell 111 and the lower half shell 112, thus avoiding torsion between the upper half shell 111 and the lower half shell 112.

[0029] The upper annular groove 1112, the lower annular groove 1122 and the vertical groove 113 have the same depth. There are two cushion blocks 1142 between the locking strip 114 and the bottom of the vertical groove 113, and the cushion blocks 1142 can expand thermally. Since the end of the locking strip 114 is connected to the upper clamping ring 1113 and the lower clamping ring 1123, there will be a gap between the locking strip 114 and the bottom of the vertical groove 113. Under the action of the cushion blocks 1142, the locking strip 114 can be supported, ensuring that the locking strip 114 can reliably pull the upper clamping ring 1113 and the lower clamping ring 1123 in the vertical direction. Further, the coefficient of thermal expansion of the cushion blocks 1142 is greater than that of the locking strip 114, the upper clamping ring 1113 and the lower clamping ring 1123. In this way, when the cushion blocks 1142 are heated, they will produce a large expansion deformation, and then push the locking strip 114 to bend towards the outside of the vertical groove 113. In this process, the bent locking strip 114 will form a pulling force on the two bolts 1141, which will also cause a slight bending deformation of the bolts 1141, improving the pulling force between the locking strip 114 and the upper clamping ring 1113 and between the locking strip 114 and the lower clamping ring 1123, making the upper half shell 111 and the lower half shell 112 fit more tightly.

[0030] A pair of disassembly holes 1124 are provided at the bottom of the lower half shell 112, and the disassembly holes 1124 are arc-shaped waist holes. After the spinning assembly 1 is lifted out of the spinning box, the spinning assembly 1 can be transported to the disassembly workbench. At the same time, there are two limit posts on the disassembly workbench. When the spinning assembly 1 is placed on the disassembly workbench, the disassembly holes 1124 can be aligned with the limit posts, and then the bolts 1141 are screwed out and the locking strip 114 is removed. At this time, the equipment for lifting the spinning assembly 1 does not need to be separated from the spinning assembly 1. After the horizontal and vertical height positions are determined, it can be directly rotated to separate the upper half shell 111 and the lower half shell 112, maximizing the disassembly efficiency of the spinning assembly 1.

[0031] This embodiment also discloses a melt-drop resistant and flame-retardant polyester fiber.

[0032] A melt-drop resistant and flame-retardant polyester fiber is prepared by using a melt-drop resistant and flame-retardant polyester fiber production device, ensuring reliable spinning of polyester fibers even after adding a large amount of compounds such as melt-drop inhibitors.

[0033] In summary, the above are only the preferred embodiments of the present invention, and are not used to limit the scope of implementation of the present invention. All equivalent changes and modifications made according to the shape, structure, features and spirit of the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An anti-drip flame-retardant polyester fiber production device, comprising a spinning assembly, the spinning assembly includes a tubular outer shell, an upper inner part of the outer shell is provided with a sealing plate, a lower inner part of the outer shell is provided with a spinning plate, and a filtering unit is arranged between the spinning plate and the sealing plate, characterized in that: The outer shell includes an upper half shell and a lower half shell, which are connected by threads between the upper half shell and the lower half shell. A limiting ring is provided at the lower part inside the lower half shell. A first stepped groove is provided on the outer wall of the spinning plate, and the first stepped groove is adaptively mounted on the limiting ring. The lower part of the spinning plate is located inside the lower half shell, and the upper part of the spinning plate is located inside the upper half shell.

2. The anti-dripping flame-retardant polyester fiber production device according to claim 1, wherein: The sealing plate and the upper half shell are connected by threads, and a threaded hole is provided at the top of the sealing plate for screwing and disassembling the hanging rod.

3. The anti-drip flame-retardant polyester fiber production device according to claim 1, characterized in that: A melt inlet is provided on the outer wall of the upper half shell, and the melt inlet is located between the sealing plate and the filtering unit. The filtering unit includes a diversion plate, a housing shell, and a filter screen. The diversion plate is mounted on the top opening of the housing shell. A confluence hole is provided at the top of the diversion plate, and a plurality of diversion holes are provided at the bottom. A melt cavity is provided inside the diversion plate, and the top of the melt cavity is communicated with the confluence hole, and the bottom of the melt cavity is communicated with the diversion holes. A filter screen is provided at both the upper part inside the housing shell and the lower part inside the housing shell. A sea sand layer is provided between the two filter screens, and a plurality of distribution holes are provided at the bottom of the housing shell.

4. The anti-dripping flame-retardant polyester fiber production device according to claim 3, wherein: A second stepped groove is provided at the lower part of the outer wall of the diversion plate, and the second stepped groove is adaptively mounted on the top of the housing shell. The top of the diversion plate is concave, the confluence hole is located at the lower position of the top of the diversion plate, and the height of the melt cavity gradually decreases from the axis to the surrounding direction.

5. The anti-dripping flame-retardant polyester fiber production device according to claim 3, characterized in that: A distribution groove is provided at the bottom of the housing shell, and the distribution holes are provided at the bottom of the distribution groove.

6. The anti-drip flame-retardant polyester fiber production device according to claim 4, wherein: The bottom of the diversion plate is located inside the housing shell, and an aluminum ring is provided between the bottom of the diversion plate and the filter screen located above. The inner diameter of the mesh holes of the filter screen located above is larger than the inner diameter of the mesh holes of the filter screen located below.

7. The anti-dripping flame-retardant polyester fiber production device according to claim 1, characterized in that: An upper ring groove is provided on the outer wall of the upper half shell and below the first stepped groove. A lower ring groove is provided on the outer wall of the lower half shell. A pair of vertical grooves are provided at the lower part of the outer shell. One end of the vertical groove is communicated with the upper ring groove, and the other end of the vertical groove is communicated with the lower ring groove. An upper clamping ring is sleeved in the upper ring groove, a lower clamping ring is sleeved in the lower ring groove, a locking strip is provided in the vertical groove, one end of the locking strip presses on the outer wall of the upper clamping ring, the other end of the locking strip presses on the outer wall of the lower clamping ring, and the locking strip and the upper clamping ring, and the locking strip and the lower clamping ring are both locked by bolts.

8. The anti-dripping flame-retardant polyester fiber production device according to claim 7, wherein: The upper ring groove, the lower ring groove, and the vertical groove have the same depth. Two cushion blocks are provided between the locking strip and the bottom of the vertical groove, and the cushion blocks can expand when heated.

9. The anti-dripping flame-retardant polyester fiber production device according to claim 7, characterized in that: A pair of disassembly holes are provided at the bottom of the lower half shell, and the disassembly holes are arc-shaped waist holes.

10. A melt-drop resistant and flame-retardant polyester fiber is prepared by using a melt-drop resistant and flame-retardant polyester fiber production device according to any one of claims 1-9.

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