Novel DIO spinning assembly

Abstract

The utility model relates to a novel DIO spinning component, which belongs to the technical field of polyester filament yarn production and comprises a component shell and a component connector mounted on a spinning manifold, a spinneret plate, a sand cup and a component upper cover are sequentially mounted in the component shell from bottom to top, and the component connector is rotatably connected into the component shell through external threads and is compressed with the component upper cover. A first inclined melt hole is formed in the center of the top end of the assembly upper cover, a circular groove is formed in the outer side of the first inclined melt hole, a first straight melt hole is formed in the circular groove, a second inclined melt hole is formed in the center of the bottom end of the assembly connector, a second straight melt hole is further formed in the assembly connector, and the first inclined melt hole is communicated with the second inclined melt hole. According to the utility model, the assembly connector can be rotatably mounted, so that the problem that a DIO assembly cannot be rotatably fixed is solved, the length change of a windless area is realized by replacing connectors with different lengths, and the problem that part of superfine denier and special-shaped polyester filaments cannot be produced is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester filament production, in particular to a novel rotatable DIO spinning component. Background Art

[0002] The spin pack is the heart of the polyester filament production process and plays a vital role in the process. With the centralization of equipment, the DIO spin pack incorporates two independent sets of sand cups within one assembly, forming a melt filtration chamber. Two filament bundles are extruded through a single spinneret, significantly improving production efficiency.

[0003] Existing DIO spinning assemblies are threaded onto the spinning manifold base via locking rings. The length of the built-in connector is fixed, and the assembly height, and thus the length of the wind-free zone, cannot be altered by changing the connector length. The wind-free zone length is typically changed by adding an aluminum plate to the spinning manifold, which is then sealed with a silicone gasket. Silicone gaskets are expensive and prone to poor sealing, impacting product quality. Some low-porous ultrafine and fine denier heterosexual polyester filaments require rapid cooling, requiring a very small wind-free zone. Due to the fixed nature of the DIO spinning assembly, these requirements are unsuitable for production. Utility Model Content

[0004] The purpose of the present invention is to provide a novel DIO spinning assembly to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A novel DIO spinning assembly comprises an assembly shell and an assembly connector mounted on a spinning manifold, wherein a spinneret, a sand cup and an assembly upper cover are sequentially mounted in the assembly shell from bottom to top, an internal thread is provided on the top of the assembly shell, an external thread matching the internal thread is provided on the bottom of the assembly connector, the assembly connector is rotatably connected to the assembly shell through the external thread and pressed against the assembly upper cover, a first oblique melt hole is provided at the center of the top of the assembly upper cover, a circular groove is provided on the assembly upper cover outside the first oblique melt hole, a first straight melt hole is provided in the circular groove, and the bottom of the assembly connector A second oblique melt hole is provided at the center, and a second straight melt hole is also provided in the component connector on one side of the second oblique melt hole. The first oblique melt hole is connected to the second oblique melt hole, and the second straight melt hole is connected to the circular groove. Two filter chambers are provided in the sand cup, and the bottom of the first oblique melt hole and the bottom of the first straight melt hole are respectively connected to the two filter chambers. Diverter plates are installed on the tops of the two filter chambers, and the two filter chambers are filled with metal sand. Stainless steel meshes are installed on the upper and lower sides of the metal sand. The bottoms of the two filter chambers are connected to the spinneret through a number of small holes.

[0007] Preferably, an O-ring groove 1 is provided on the outside of the second inclined melt hole and the second straight melt hole at the top of the component connector, and an O-ring is placed in the O-ring groove 1 for connecting and sealing with the connecting plate on the spinning box.

[0008] Preferably, four bolt holes are provided on the component connecting head, and the component connecting head is connected and fixed to the connecting plate by hexagon socket bolts. A positioning pin 1 is provided at the connection between the top of the component connecting head and the spinning box connecting plate for positioning, and a positioning pin 2 is provided at the connection between the side wall of the component connecting head and the component shell for positioning, so that the component can be rotated and installed.

[0009] Preferably, the first inclined melt hole and the outer side of the circular groove at the top of the component cover are respectively provided with O-ring groove 2 and O-ring groove 3, and O-rings are placed in the O-ring groove 2 and O-ring groove 3 for connecting and sealing with the second inclined melt hole and the second straight melt hole at the bottom end of the component connector.

[0010] Preferably, the bottom end of the upper cover of the component is a bell-mouth structure, and the bottom ends of the first inclined melt hole and the first straight melt hole are arc holes, which can enable the melt to better pass through the diverter plate into the sand cup.

[0011] Preferably, the component upper cover and the sand cup are sealed by a middle semicircular aluminum ring, the top of the component upper cover is fastened to the inner wall of the component shell by a retaining spring, and the sand cup and the spinneret are sealed by the middle circular aluminum ring.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model has a rotatable assembly connector. When the DIO spinning assembly rotates, the second oblique melt hole and the first oblique melt hole are docked; the second straight melt hole is docked with the first straight melt hole through a circular groove, connected to the assembly connector through a thread and sealed with an O-ring to prevent leakage, and positioned with a positioning pin, thus overcoming the problem that the DIO assembly cannot be rotated and fixed.

[0014] 2. By replacing connectors of different lengths, the length of the windless zone between the spinneret and the filter element can be changed, solving the problem that some ultra-fine denier and heterosexual polyester filaments cannot be produced; at the same time, the aluminum plate seal is eliminated, reducing the occurrence of uneven yarn bundles caused by air leakage from the aluminum plate seal, thereby improving the product; at the same time, not using white silicone sealing pads can reduce production costs and reduce material consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the structural diagram of the DIO spinning assembly of the utility model;

[0016] Figure 2 This is the main view of the upper cover of the utility model component;

[0017] Figure 3 This is a cross-sectional view of the upper cover of the component of the utility model;

[0018] Figure 4 This is the front view of the connector of the component of the utility model;

[0019] Figure 5 This is a cross-sectional view of the connector of the component of the utility model;

[0020] Figure 6 This is the structural diagram of the spinning process of this utility model.

[0021] Reference numerals

[0022] 1. DIO spinning assembly; 101. Assembly housing; 102. Assembly cover; 103. Diverter plate; 104. Filter chamber; 105. Sand cup; 106. Spinneret; 107. Circular aluminum ring; 108. Stainless steel mesh; 109. Semicircular aluminum ring; 110. Circular spring; 111. Circular groove; 112. First straight melt hole; 113. Second O-ring groove; 114. Third O-ring groove; 115. First oblique melt hole;

[0023] 2. Component connector; 201. Locating pin 1; 202. Bolt hole; 203. O-ring groove 1; 204. Locating pin 2; 205. External thread; 206. Second oblique melt hole; 207. Second straight melt hole;

[0024] 3. Metering pump; 4. Pump connecting plate; 5. Melt pipe; 6. Connecting plate; 7. Sealing gasket; 8. Wind direction filter element baffle; 9. Ring blowing filter element; 10. Ring blowing bellows; 11. Hexagon socket bolt; 12. Spinning box. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0026] like Figure 1-6 As shown, a new type of DIO spinning assembly includes a component shell 101 and a component connector 2 installed on a connecting plate 6 on a spinning box body 12. A spinneret 106, a sand cup 105 and a component upper cover 102 are installed in the component shell 101 from bottom to top. An internal thread is provided on the top of the component shell 101, and an external thread matching the internal thread is provided on the bottom of the component connector 2. The component connector 2 is rotated and connected to the component shell 101 through the external thread and pressed against the component upper cover 102.

[0027] A first oblique melt hole 115 is provided at the center of the top of the component cover 102, and a 10 mm deep circular groove 111 is provided on the component cover 102 outside the first oblique melt hole 115. A first straight melt hole 112 is provided in the circular groove 111. A second oblique melt hole 206 is provided at the center of the bottom end of the component connector 2, and a second straight melt hole 207 is also provided in the component connector on one side of the second oblique melt hole 206. The first oblique melt hole 115 is connected to the second oblique melt hole 206, and the second straight melt hole 207 is connected to the circular groove 111.

[0028] Two filter chambers 104 are provided in the sand cup 105. The bottom of the first inclined melt hole 115 and the bottom of the first straight melt hole 112 are respectively connected to the two filter chambers 104. A diverter plate 103 is installed on the top of the two filter chambers 104. The bottom end of the component cover 102 is a trumpet structure. The bottom ends of the first inclined melt hole 115 and the first straight melt hole 112 are arc holes, which can enable the melt to better pass through the diverter plate 103 into the sand cup 105.

[0029] Both filter chambers 104 are filled with metal sand, and stainless steel meshes 108 are installed on the upper and lower sides of the metal sand. The bottoms of the two filter chambers 104 are connected to the spinneret 106 through several small holes; the component cover 102 and the sand cup 105 are sealed by the middle semicircular aluminum ring 109, and the top of the component cover 102 is fastened to the inner wall of the component shell 101 by a retaining spring 110, and the sand cup 105 and the spinneret 106 are sealed by the middle circular aluminum ring 107.

[0030] A 1mm wide O-ring groove 203 is provided on the outside of the second inclined melt hole 206 and the second straight melt hole 207 at the top of the component connector 2. A 1mm copper O-ring is placed in the O-ring groove for sealing with the connecting plate 6 on the spinning manifold.

[0031] A locating pin 201 is provided at the connection between the top of the component connector 2 and the spinning box connecting plate 6 for positioning. Four bolt holes 202 are provided on the component connector 2. The component connector 2 is fixed to the connecting plate 6 with a 12.9 grade hexagon socket bolt 11. A locating pin 204 is provided at the connection between the side wall of the component connector 2 and the component shell 101 for positioning, so that the component can be rotated and installed.

[0032] The first inclined melt hole 115 at the top of the component cover 102 and the outer side of the circular groove 111 are respectively provided with 1mm wide grooves O-ring groove 2 113 and O-ring groove 3 114. 1mm copper O-rings are placed in O-ring groove 213 and O-ring groove 3 114 to connect and seal with the second inclined melt hole 206 and the second straight melt hole 207 at the bottom of the component connector.

[0033] The working principle of this utility model is:

[0034] like Figure 6As shown, after the spinning melt is distributed by the metering pump 3, it enters the assembly connector 2 from the melt pipe 5 below the pump connecting plate 4 through the connecting plate 6, and then enters the DIO spinning assembly 1 through the second inclined melt hole 206 and the second straight melt hole 207 in the assembly connector 2;

[0035] The melt in the second inclined melt hole 206 flows to the first inclined melt hole 115 connected to it, and the melt in the second straight melt hole 207 flows to the circular groove 111 connected to it and the first straight melt hole 112 in the circular groove, and then respectively enters the two diversion plates 103 under the component cover 102, and flows into the two sand cups 105 from the four sides of the two diversion plates 103. The filter chamber 104 in the sand cup 105 is filled with metal sand of different coarsenesses according to product specifications. Stainless steel meshes 108 are fixed above and below the metal sand. The filtered melt passes through the small holes at the bottom of the sand cup 105 and enters the spinneret 106. After extrusion, it is cooled and formed in the annular blowing area. The spinning box 12 is connected to the annular blowing area through the sealing gasket 7 and the wind direction filter element baffle 8. The wind in the annular blowing box 10 is filtered by the annular blowing filter element 9 to cool the filament bundle. Finally, after spinning and winding, polyester filament products are produced.

[0036] The utility model has a rotatable assembly connector 2. When the DIO spinning assembly 1 rotates, the second oblique melt hole 206 and the first oblique melt hole 115, which are located at the top and bottom ends of the assembly upper cover 102 and the center of the assembly connector 2 respectively, are docked and sealed with an O-ring; the second straight melt hole 207 is docked with the first straight melt hole 112 through the circular groove 111 and sealed with an O-ring to prevent melt leakage; and is connected to the assembly connector 2 through the threads on the assembly housing 101.

[0037] When the DIO spinning assembly 1 rotates, the melt will not be unable to flow due to the misalignment of the two melt holes, and the melt can flow normally after the assembly is rotated; after the DIO spinning assembly 1 is rotated, the height of the assembly can be changed by changing the length of the assembly connector 2, and the length of the windless zone can be changed by disassembling and replacing the assembly connector 2 with different lengths, thereby solving the problems existing in the existing technology and meeting the production of different types of polyester filaments.

[0038] Implementation Case 1

[0039] The preparation of an ultra-fine denier polyester fiber (22dtex / 72f) using this assembly specifically includes the following steps:

[0040] Metering and distribution: using a 0.3cc / rmp metering pump, the melt inlet pressure is 4.6Ma and the outlet pressure is 16MPa;

[0041] Melt extrusion: The melt temperature is 294°C, and the fibers are extruded from the spinneret through component filtration to form nascent fibers. 100-mesh metal sand and a metal filter are placed in the spinning assembly. The assembly connector is 73 mm long, and the windless zone (the cooling distance between the assembly spinneret and the annular air flow) is 5 mm. The resulting ultrafine denier polyester fibers have a dryness of U% = 0.66, CV% = 0.85, and Uh:% = 0.30.

[0042] Implementation Case 2

[0043] The preparation of a polyester fiber (53dtex / 48f) using this assembly specifically includes the following steps:

[0044] Metering and distribution: using a 0.9cc / rmp metering pump, the melt inlet pressure is 4.6Ma and the outlet pressure is 16MPa;

[0045] Melt extrusion: The melt temperature is 288°C, and the fiber is extruded from the spinneret through DIO component filtration to form nascent fibers. The spinning assembly is loaded with 80-mesh metal sand and a metal filter. The assembly connector is 53 mm long, and the windless zone length (the cooling distance between the assembly spinneret and the annular air blower) is 25 mm. The final conventional polyester fiber has a yarn dryness of U% = 0.65, CV% = 0.89, and Uh:% = 0.27.

[0046] Comparative Example (Comparison between the component device in the existing technology and implementation case 2)

[0047] A method for preparing polyester fiber (53 dtex / 48 f) employs the same process flow and parameters as in Example 2, differing from Example 2 in that a conventional assembly device is employed. The resulting ultrafine denier polyester fiber exhibits significantly superior properties, with a U% of 0.95, a CV% of 1.2, and a Uh% of 0.71. The novel DIO assembly device exhibits significantly superior physical properties.

[0048] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A novel DIO spinning assembly, characterized by: The invention comprises a component shell and a component connector installed on a spinning box body, wherein a spinneret, a sand cup and a component upper cover are sequentially installed in the component shell from bottom to top, an internal thread is provided on the top of the component shell, an external thread matching the internal thread is provided on the bottom of the component connector, the component connector is rotatably connected to the component shell through the external thread and pressed tightly against the component upper cover, a first oblique melt hole is provided at the center of the top end of the component upper cover, a circular groove is provided on the component upper cover outside the first oblique melt hole, a first straight melt hole is provided in the circular groove, and a first Two oblique melt holes, a second straight melt hole is also provided in the component connector on one side of the second oblique melt hole, the first oblique melt hole is connected to the second oblique melt hole, the second straight melt hole is connected to the circular groove, two filter chambers are provided in the sand cup, the bottom of the first oblique melt hole and the bottom of the first straight melt hole are respectively connected to the two filter chambers, the tops of the two filter chambers are both installed with diverter plates, the two filter chambers are filled with metal sand, stainless steel meshes are installed on the upper and lower sides of the metal sand, and the bottoms of the two filter chambers are connected to the spinneret through a number of small holes.

2. A novel DIO spinning assembly according to claim 1, characterized in that: An O-ring groove 1 is provided on the outside of the second inclined melt hole and the second straight melt hole at the top of the component connector. An O-ring is placed in the O-ring groove 1 for connecting and sealing with the connecting plate on the spinning box.

3. A novel DIO spinning assembly according to claim 2, characterized in that: The component connecting head is provided with four bolt holes, and the component connecting head is fixed to the connecting plate by hexagon socket bolts. A positioning pin 1 is provided at the connection between the top of the component connecting head and the spinning box connecting plate for positioning, and a positioning pin 2 is provided at the connection between the side wall of the component connecting head and the component shell for positioning, so that the component can be rotated and installed.

4. A novel DIO spinning assembly according to claim 1, characterized in that: The first inclined melt hole and the circular groove at the top of the component cover are respectively provided with O-ring groove 2 and O-ring groove 3 on the outside. O-rings are placed in the O-ring groove 2 and O-ring groove 3 for connecting and sealing with the second inclined melt hole and the second straight melt hole at the bottom of the component connector.

5. The novel DIO spinning assembly according to claim 1, characterized in that: The bottom end of the component upper cover is a bell-mouth structure, and the bottom ends of the first inclined melt hole and the first straight melt hole are arc holes, which can make the melt pass through the diverter plate better and enter the sand cup.

6. The novel DIO spinning assembly according to claim 1, characterized in that: The component upper cover and the sand cup are sealed by a middle semicircular aluminum ring, the top of the component upper cover is fastened to the inner wall of the component shell by a retaining spring, and the sand cup and the spinneret are sealed by the middle circular aluminum ring.

Images