CN219137012U - Screw rod for nylon spinning - Google Patents
Screw rod for nylon spinning Download PDFInfo
- Publication number
- CN219137012U CN219137012U CN202223468930.9U CN202223468930U CN219137012U CN 219137012 U CN219137012 U CN 219137012U CN 202223468930 U CN202223468930 U CN 202223468930U CN 219137012 U CN219137012 U CN 219137012U
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- Prior art keywords
- screw
- section
- spinning
- length
- pins
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- 238000009987 spinning Methods 0.000 title claims abstract description 30
- 239000004677 Nylon Substances 0.000 title claims abstract description 15
- 229920001778 nylon Polymers 0.000 title claims abstract description 15
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 21
- 230000007704 transition Effects 0.000 claims description 5
- 229920006052 Chinlon® Polymers 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000010006 flight Effects 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 241001661918 Bartonia Species 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a screw for nylon spinning, and belongs to the technical field of chemical fiber nylon spinning production equipment. The screw includes: the device comprises a screw handle, a feeding section, a compression section, a metering section and a mixing section, wherein the diameter of the screw is D, and the length of the feeding section is about 4 D+/-0.5D; the length of the compression section is 12 D+/-0.5D; the length of the metering section is 6.5D plus or minus 0.5D, and the groove depth H of the metering section 3 = (0.036 to 0.045) D; the length-diameter ratio L of the screw rod is D=26:1, and the compression ratio is 2.68-2.75. The utility model has the advantages that: 1. the processing and manufacturing are convenient; 2. the screw is well plasticized, the prepared melt is uniformly mixed, the content of bubbles in the melt is small, the spinning breakage rate is low, and the spinning production efficiency and the fiber quality are greatly improved.
Description
Technical Field
The utility model relates to the field of chemical fiber spinning equipment, in particular to a screw rod for nylon spinning.
Background
Spinning screws are an important component of melt spinning machines, namely screw extruders. The method has the functions of conveying and mixing solid polymer slices, melting the solid polymer slices into melt, quantitatively, fixing pressure and fixing temperature, extruding the melt from a machine head, and conveying the melt to a spinning box through a melt pipeline. In general, a spinning screw is generally in a short zone gradual change type, and a working zone is divided into 3 sections, namely a feeding section, a compression section and a metering section, wherein the length of each section is related to the property of a processed material. In actual production, the materials are subjected to the action of temperature and pressure in a screw extruder, the viscosity and the structure change in a complex manner, and under special conditions, chemical changes can also occur, the structural design of the screw is particularly critical, and particularly the phenomenon of spinning broken ends in the nylon yarn production process frequently occurs.
Disclosure of Invention
The utility model aims to solve the problem of a plurality of broken ends in the traditional screw spinning process for nylon yarns, and provides a screw for nylon spinning.
In order to achieve the above object, the present utility model is achieved by: a screw for chinlon spinning, the screw comprising: the device comprises a screw handle, a feeding section, a compression section, a metering section and a mixing section, wherein the diameter of the screw is D, and the length of the feeding section is about 4D; the length of the compression section is 12D; the length of the metering section is 6.5D, and the groove depth H of the metering section 3 =(0.036～0.045)D。
The screw rod adopts the design of the shallow groove screw rod, shortens the length of the feeding section, enlarges the length of the compression section, reduces air entrained between materials in the material stacking gap in the feeding process, compresses the materials in advance, discharges the entrained air to the direction of the feeding section while compacting the materials as much as possible, reduces the content of bubbles in the melt during melt extrusion, and further reduces the phenomenon of yarn breakage in the spinning process.
In one embodiment of the present application, preferably, the feeding section, the compression section and the metering section of the screw are each provided with a screw flight, and the pitch of each screw flight is equal to the diameter of the screw.
In one embodiment of the present application, preferably, the helix angle of each of the flight is 17 ° 40'.
In one embodiment of the present application, preferably, each section of the spiral rib has a zigzag cross section, and the advancing surface of the zigzag cross section is perpendicular to the circumferential surface of the corresponding spiral groove, and the zigzag cross section corresponds to a relief angle α=10°. The screw rib section of the screw adopts a zigzag structural design, so that the strength of the screw can be improved, and dead angle material storage phenomenon is avoided
In one embodiment of the present application, the surfaces of the screw and flight are preferably coated with a wear resistant alloy layer.
In one embodiment of the present application, preferably, a material guiding seal groove is provided in a transition section between the feed section of the screw and the shank of the screw.
In one embodiment of the present application, preferably, the mixing section of the screw is provided with a plurality of cylindrical pins, the plurality of pins are divided into two groups, one group of pins are divided into a plurality of rows and are arranged along the axial direction of the screw, the other group of pins are divided into a plurality of columns and are arranged on the circumferential surface of the mixing section in a chevron shape, and the pins arranged along the axial direction and the pins arranged in a chevron shape are staggered at intervals in the circumferential direction of the screw. The pin can repeatedly divide and refine uneven melt by adopting the design of the herringbone arrangement, and simultaneously, the pin is combined in a round, so that materials are fully mixed, and the difference of the melt in temperature and melting degree is reduced.
In one embodiment of the present application, the screw aspect ratio L: d=26:1, and the compression ratio is preferably 2.68 to 2.75.
The utility model has the advantages that: the air that material and material stack space were carried in this application can reduce the reinforced in-process material, reduces the bubble content in the fuse-element when melting extrusion to the phenomenon of silk thread broken ends in the reduction spinning process.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
FIG. 2 is a cross-sectional view at A-A in FIG. 1;
FIG. 3 is an expanded view of the circumferential surface of the screw kneading block;
FIG. 4 is a cross-sectional view at B-B in FIG. 1;
fig. 5 is a partial enlarged view at I in fig. 1.
Wherein: 10. a screw; 11. a screw shank; 111. sealing grooves; 12. a feed section; 13. a compression section; 14. a metering section; 15. a mixing section; 151. a pin; 16. screw edges; 161. a propulsion surface; 162. a guide surface.
Description of the embodiments
The utility model is further described below with reference to the drawings and examples.
The applicant finds that in the process of checking the problems of the prior spinning broken ends, the melt prepared by the screw is mixed with bubbles, the number of the bubbles is large, the volume is large, the spinning is easy to break, and the normal production is influenced. Therefore, the applicant provides a nylon spinning screw capable of reducing material bubbles.
Fig. 1 shows a screw for nylon spinning, and the screw 10 comprises a screw handle 11, a feeding section 12, a compression section 13, a metering section 14 and a mixing section 15 which are sequentially arranged from back to front. The screw handle 11 is arranged at the output end of the hollow shaft of the screw speed reducer, and the screw handle and the hollow shaft are connected through keys to realize transmission. The left side in fig. 1 is the front and the right side is the rear.
The diameter of the screw 10 is D, the bottom diameter D of each section 1 Different from each other. Wherein the length of the feeding section 12 is about 4D, and the length of the compression section 13 is about 12D; the length of the metering section 14 is about 6.5D, and the groove depth H of the metering section 14 3 = (0.036 to 0.045) D; the length-diameter ratio of the screw 10 is L, D=26:1, and the compression ratio is 2.68-2.75.
The utility model adopts the design of the shallow groove screw, shortens the length of the feeding section 12, enlarges the length of the compression section 13, reduces air entrained between materials in the material stacking gap in the feeding process, compresses the materials in advance, discharges the entrained air to the direction of the feeding section 12 while compacting the materials as much as possible, reduces the bubble content in the melt during melt extrusion, and thereby avoids broken ends in the spinning process.
Preferably, the bottom diameter of the feed section 12 of the screw 10 is constant, the bottom diameter of the screw compression section 13 is gradually increased from back to front, and the bottom diameter of the screw metering section 14 is constant.
Preferably, the screw feeding section 12, the compression section 13 and the metering section 14 are all provided with screw edges 16, the screw pitches of the screw edges 16 of each section are equal, and the screw pitches are equal to the diameter D of the screw, and the helix angles of the screw edges are 17 degrees 40'.
Referring to fig. 2, the cross section of the full flight 16 is saw-tooth, the front surface of the flight 16 is a thrust surface 161, and the rear surface is a guide surface 162. The propelling surface 161 of the saw-tooth section is perpendicular to the surface of the corresponding screw groove, the back angle alpha=10° corresponding to the saw-tooth section, the screw edge 16 and the bottom surface of the screw groove adopt arc transition, and the arc radius R of the propelling surface 161 1 Radius R of arc corresponding to guide surface 162 2 And the screw edge width b= (0.1-0.12) D is small, and the screw edge opening is chamfered by R0.5 degrees. The screw rib section of the screw adopts a zigzag structural design, so that the screw has high strength, and dead angle stock phenomenon can be avoided due to the design of a rear angle
Preferably, the outer surfaces of the screw rod and the screw rib are plated with a wear-resistant alloy layer, so that the screw rod has better wear resistance.
Preferably, the screw shank 11 is provided with a key groove, and the specific groove shape depends on the screw load; screw hole is set at the axial center of the screw stem for screw assembly and disassembly.
Referring to fig. 3-4, preferably, the mixing section 15 of the screw 10 is provided with a plurality of cylindrical pins 151, the plurality of pins 151 are divided into two groups, one group of pins 151 is divided into a plurality of rows and is arranged along the axial direction of the screw 10, the other group of pins 151 is divided into a plurality of columns and is unfolded and arranged in a herringbone shape on the circumferential surface of the mixing section 15, and the pins arranged along the axial direction and the pins arranged in a herringbone shape are staggered with each other in the circumferential direction of the screw.
The cylindrical pin is driven into a pre-drilled round hole of the screw rod in a press fit mode, and is in a slightly tight transition fit mode. The length of the cylindrical pin embedded in the screw body is slightly longer than the length exposed outside. The diameter and the number of the cylindrical pins are increased along with the increase of the screw diameter, and the diameters of the commonly used cylindrical pins are 3.5mm, 5mm, 6mm, 8mm and the like.
The pin can repeatedly divide and refine uneven melt by adopting the design of the herringbone arrangement, and simultaneously, the pin is combined in a round, so that materials are fully mixed, and the difference of the melt in temperature and melting degree is reduced.
Referring to fig. 5, a material diversion seal groove 111 is further provided in the transition section between the feeding section 12 of the screw and the screw stem 11, so as to avoid leakage of material from the screw stem 11.
The foregoing has outlined rather broadly the more detailed description of the utility model in order that the detailed description thereof herein may be better understood, and in order that the present utility model may be better understood. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (8)
1. A screw for chinlon spinning, the screw comprising: screw rod stalk portion, feeding section, compression section, measurement section and mixing section, its characterized in that: the diameter of the screw rod is D, and the length of the feeding section is 4D; the length of the compression section is 12D; the length of the metering section is 6.5D, and the groove depth H of the metering section 3 =(0.036～0.045)D。
2. The nylon spinning screw of claim 1, wherein the feeding section, the compression section and the metering section of the screw are provided with screw edges, and the screw pitch of each section of screw edge is equal to the diameter of the screw.
3. A chinlon spinning screw as claimed in claim 2, characterized in that the helix angle of each of the screw flights is 17 ° 40'.
4. A nylon spinning screw as claimed in claim 2, wherein each section of said screw has a zigzag cross section, and the advancing surface of said zigzag cross section is perpendicular to the circumferential surface of the corresponding screw groove, and said zigzag cross section corresponds to a relief angle α=10°.
5. A screw for chinlon spinning according to any one of claims 2 to 4, wherein the surfaces of the screw and the screw flights are coated with a wear-resistant alloy layer.
6. The nylon spinning screw of claim 1, wherein a material guiding seal groove is arranged at a transition section between a feeding section of the screw and a screw shank.
7. The screw for nylon spinning according to claim 1, wherein a mixing section of the screw is provided with a plurality of cylindrical pins, the pins are divided into two groups, one group of pins are divided into a plurality of rows and are arranged along the axial direction of the screw, the other group of pins are divided into a plurality of columns and are unfolded and arranged on the circumferential surface of the mixing section in a herringbone shape, and the pins arranged along the axial direction and the pins arranged in a herringbone shape are mutually staggered in the circumferential direction of the screw.
8. The nylon spinning screw of claim 1, wherein the screw aspect ratio L: d=26:1, and the compression ratio is 2.68-2.75.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223468930.9U CN219137012U (en) | 2022-12-22 | 2022-12-22 | Screw rod for nylon spinning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223468930.9U CN219137012U (en) | 2022-12-22 | 2022-12-22 | Screw rod for nylon spinning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219137012U true CN219137012U (en) | 2023-06-06 |
Family
ID=86559181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223468930.9U Active CN219137012U (en) | 2022-12-22 | 2022-12-22 | Screw rod for nylon spinning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219137012U (en) |
-
2022
- 2022-12-22 CN CN202223468930.9U patent/CN219137012U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant |