CN102493239A - Special metal wire twisting machine - Google Patents
Special metal wire twisting machine Download PDFInfo
- Publication number
- CN102493239A CN102493239A CN2011103900588A CN201110390058A CN102493239A CN 102493239 A CN102493239 A CN 102493239A CN 2011103900588 A CN2011103900588 A CN 2011103900588A CN 201110390058 A CN201110390058 A CN 201110390058A CN 102493239 A CN102493239 A CN 102493239A
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- upper thread
- heart yearn
- assembly
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- flywheel
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Abstract
The invention relates to a special metal wire twisting machine which mainly consists of a core wire and a surface wire pay-off rack, a core wire cradle K30, a core wire transmission assembly, a core wire tension and bridge assembly, a surface wire cradle K90, a surface wire transmission assembly, an over-twisting mechanism, a speed reducer, a speedometer, a traction mechanism, a meter counter, a straightening device, a wire arranging and take-up mechanism, a main motor and an electric control cabinet. The twisting mechanism has a compact structure, causes low noise, is stable in operation, is convenient to install and maintain, ensures table product quality, and can produce cores of 3+9*0.175, 3+9*0.22 and 3+8*0.22HTHC.
Description
Technical field
The present invention relates to a kind of twisting device of twisting with the fingers system cord strand, is to be used to produce light truck tire with steel cord, the high-capacity tyre special-purpose metal silk twisting machine with semi-finished product line and high strength cord.
Background technology
The wire twisting apparatus of existing 3+9 * 0.175,3+9 * 0.22,3+8 * 0.22HT HC structure is except that import; Of home make this equipment exists following shortcoming: 1, the independent unwrapping wire of heart yearn and upper thread; Twist with the fingers into cord by external line concentration mechanism again; Increased use equipment, taken up room, use cost is high; 2, the flywheel slide block of installing on the steel. flywheel dish, wire moves up and down, and from slide block, flies out easily; 3, no velometer or motor are not with encoder, cause the heart yearn unwrapping wire asynchronous with the upper thread unwrapping wire; 4, receive winding displacement and adopt the screw mandrel winding displacement, winding displacement width and tension adjustment inconvenience, versatility and interchangeability are relatively poor.
Summary of the invention
In order to overcome the shortcoming that prior art exists, the purpose of this invention is to provide a kind of compact conformation, operate steadily, noise is low, safe and reliable, convenient for installation and maintenance, effective conserve space, reduce the new exclusive wire twisting machine of use cost.
In order to achieve the above object; The technical scheme that the present invention adopts is: a kind of special-purpose metal silk twisting machine; Crossing axle assembly, upper thread unwrapping wire assembly and take-up assembly by electric cabinet, heart yearn unwrapping wire assembly, heart yearn tension force is arranged in order and forms; Heart yearn unwrapping wire assembly and upper thread unwrapping wire assembly are by main drive of motor; Its technical characterstic is to be provided with the line concentration assembly in the said upper thread unwrapping wire assembly, and said upper thread unwrapping wire assembly comprises forward and backward upper thread flywheel shaft assembly, forward and backward upper thread Flywheel disc, upper thread bassinet stand and a plurality of upper thread I-beam wheel, and main drive of motor connects forward and backward upper thread flywheel shaft assembly; The forward and backward upper thread flywheel shaft of forward and backward upper thread flywheel shaft assembly connects the two ends of upper thread bassinet stand respectively; A plurality of upper thread I-beam wheel are installed on the upper thread bassinet stand, and the upper thread bassinet stand is located between the forward and backward upper thread Flywheel disc, and forward and backward upper thread Flywheel disc connects forward and backward upper thread flywheel shaft respectively; Be equipped with two upper thread flywheel shaft wire-crossing wheels on the forward and backward upper thread flywheel shaft, the outer arc limit of forward and backward upper thread Flywheel disc all is arranged with two flywheel wire-crossing wheels; Said line concentration assembly comprises fracture of wire check-out console, noseplate and the pressing mold that all is connected in the upper thread bassinet stand.
Said heart yearn unwrapping wire assembly comprises forward and backward heart yearn flywheel shaft assembly, forward and backward heart yearn Flywheel disc, heart yearn bassinet stand and a plurality of heart yearn I-beam wheel; Main drive of motor connects forward and backward heart yearn flywheel shaft assembly; The forward and backward heart yearn flywheel shaft of forward and backward heart yearn flywheel shaft assembly connects the two ends of heart yearn bassinet stand respectively; A plurality of heart yearn I-beam wheel are installed on the heart yearn bassinet stand; The heart yearn bassinet stand is located between the forward and backward heart yearn Flywheel disc, and forward and backward heart yearn Flywheel disc connects forward and backward heart yearn flywheel shaft respectively, is equipped with heart yearn flywheel shaft wire-crossing wheel on the forward and backward heart yearn flywheel shaft.
Be provided with the sth. made by twisting assembly excessively of band variable-frequency motor between said upper thread unwrapping wire assembly and the take-up assembly.
Said take-up assembly is made up of haulage gear, swage, meter counter, electromagnetism strand oscillator and take-up mechanism successively.
Said main motor is through decelerator transmission heart yearn unwrapping wire assembly and upper thread unwrapping wire assembly, and decelerator is provided with velometer.
The outer arc face of said forward and backward heart yearn Flywheel disc connects the spring type brake.
Said variable-frequency motor has encoder.
Said heart yearn unwrapping wire assembly, upper thread unwrapping wire assembly and mistake sth. made by twisting assembly are arranged in the sound insulation safety guard.
Adopt above technical scheme, the beneficial effect that the present invention reaches is:
1, complete machine structure is an integrated-type, and the line concentration assembly is arranged in the upper thread unwrapping wire assembly, helps reducing installing space; Heart yearn unwrapping wire assembly, upper thread unwrapping wire assembly and mistake sth. made by twisting assembly are arranged in the sound insulation safety guard, reduce the operation noise, improve the complete machine operational safety performance;
2, symmetrical mounting spring type brake on the forward and backward heart yearn Flywheel disc is avoided wire any direction motion, and wire steering capability, retaining silk performance are good;
3, the decelerator of band velometer can guarantee that heart yearn unwrapping wire and upper thread unwrapping wire are precisely synchronous, helps the raising quality of twisting thread;
4, adopt electromagnetism strand oscillator winding displacement before the take-up mechanism take-up,, more convenient reliable than two-way screw mandrel aspect the control of tension force width adjustment, can realize the take-up of deep bid I-beam wheel.
Twisting machine compact conformation of the present invention, noise is low, operates steadily, and is convenient for installation and maintenance, constant product quality, producible cord has 3+9 * 0.175; 3+9 * 0.22; 3+8 * 0.22HT HC.
Description of drawings
Fig. 1 is the invention structural representation;
Fig. 2 is a heart yearn unwrapping wire assembly structure sketch map of the present invention;
Fig. 3 is a upper thread unwrapping wire assembly structure sketch map of the present invention.
Among the figure: switch board 1, heart yearn unwrapping wire assembly 2, heart yearn tension force is crossed axle assembly 3, upper thread unwrapping wire assembly 4, main motor 5 is crossed sth. made by twisting assembly 6; Variable-frequency motor 7, decelerator 8, velometer 9, haulage gear 10, swage 11, meter counter 12; Electromagnetism strand oscillator 13, take-up mechanism 14, line concentration mechanism 15, heart yearn power transmission shaft 21, preceding heart yearn flywheel shaft assembly 22; Back heart yearn flywheel shaft assembly 23, preceding heart yearn flywheel shaft 24, back heart yearn flywheel shaft 25, preceding heart yearn flywheel shaft wire-crossing wheel 26, back heart yearn flywheel shaft wire-crossing wheel 27; Preceding heart yearn Flywheel disc 28, back heart yearn Flywheel disc 29, spring-loaded brake 210, heart yearn bassinet stand 211, heart yearn I-beam wheel 212; Upper thread power transmission shaft 41, front wires flywheel shaft assembly 42, rear wires flywheel shaft assembly 43, front wires flywheel shaft 44, rear wires flywheel shaft 45; The first front wires flywheel shaft wire-crossing wheel 46, second face line flywheel shaft wire-crossing wheel 47, first flank line flywheel shaft wire-crossing wheel 48, second flank line flywheel shaft wire-crossing wheel 49, front wires Flywheel disc 410; Flywheel wire-crossing wheel 413, the first back fly line wheel wire-crossing wheels 414, the second back fly line wheel wire-crossing wheels 415 before the flywheel wire-crossing wheel 412, the second before the rear wires Flywheel disc 411, the first; Upper thread bassinet stand 416, upper thread I-beam wheel 417, fracture of wire check-out console 151, noseplate 152, pressing mold 153.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Shown in Fig. 1-3, a kind of special-purpose metal silk twisting machine comprises that switch board 1, line unwrapping wire assembly 2, line tension cross axle assembly 3, upper thread unwrapping wire assembly 4, main motor 5, cross sth. made by twisting assembly 6, variable-frequency motor 7, decelerator 8, velometer 9, haulage gear 10, meter counter 11, swage 12, electromagnetism strand oscillator 13, take-up mechanism 14 and line concentration mechanism 15.Line unwrapping wire assembly 2, line tension are crossed axle assembly 3, upper thread unwrapping wire assembly 4 all is arranged in the sound insulation safety guard; Heart yearn unwrapping wire assembly 2 comprises heart yearn power transmission shaft 21, forward and backward heart yearn flywheel shaft assembly 22,23, forward and backward heart yearn Flywheel disc 28,29, heart yearn bassinet stand 210 and a plurality of heart yearn I-beam wheel 212; Main motor 5 is through the heart yearn power transmission shaft 21 forward and backward heart yearn flywheel shaft assembly 22,23 that is in transmission connection; The forward and backward heart yearn flywheel shaft 24,25 of forward and backward heart yearn flywheel shaft assembly connects the two ends of heart yearn bassinet stand 210 respectively; A plurality of heart yearn I-beam wheel are installed on the heart yearn bassinet stand; The heart yearn bassinet stand is located between the forward and backward heart yearn Flywheel disc; Forward and backward heart yearn Flywheel disc connects forward and backward heart yearn flywheel shaft respectively, is respectively equipped with forward and backward heart yearn flywheel shaft wire-crossing wheel 26,27 on the forward and backward heart yearn flywheel shaft; Upper thread unwrapping wire assembly 4 comprises upper thread power transmission shaft 41, forward and backward upper thread flywheel shaft assembly 42,43, forward and backward upper thread Flywheel disc 410,411, upper thread bassinet stand 416 and a plurality of upper thread I-beam wheel 417; Main motor 5 is through the upper thread power transmission shaft 41 forward and backward upper thread flywheel shaft assembly 42,43 that is in transmission connection; The forward and backward upper thread flywheel shaft 44,45 of forward and backward upper thread flywheel shaft assembly connects the two ends of upper thread bassinet stand 416 respectively; A plurality of upper thread I-beam wheel are installed on the upper thread bassinet stand; The upper thread bassinet stand is located between the forward and backward upper thread Flywheel disc; Forward and backward upper thread Flywheel disc connects forward and backward upper thread flywheel shaft respectively, and the front wires flywheel shaft is provided with first and second front wires flywheel shaft wire- crossing wheel 46,47, and the rear wires flywheel shaft is provided with first and second rear wires flywheel shaft wire- crossing wheel 48,49; The outer arc limit of front wires Flywheel disc is arranged with first and second preceding flywheel wire-crossing wheel 412,413; The outer arc limit of rear wires Flywheel disc is arranged with first and second rear flywheel wire-crossing wheel 414,415, and the upper thread bassinet stand is provided with line concentration assembly 15, and the line concentration assembly comprises fracture of wire check-out console 151, noseplate 152 and the pressing mold 153 that all is connected in the upper thread bassinet stand; Be provided with heart yearn tension force between heart yearn unwrapping wire assembly 2 and the upper thread unwrapping wire assembly 4 and cross axle assembly 3; Upper thread unwrapping wire assembly 4 through twisting with the fingers assembly 6, haulage gear 10, swage 11, meter counter 12, electromagnetism winding displacement valve 13 connection take-up mechanisms 14, is crossed and is twisted with the fingers the variable-frequency motor 7 that the assembly connection has encoder successively; Decelerator 8 corresponding upper thread power transmission shafts are provided with, and have velometer 9 on the decelerator.
The course of work of this wire twisting machine is: will fill 3 185 of line or 188 heart yearn I-beam wheel and be installed in and carry out unwrapping wire on the heart yearn bassinet stand, will fill 9 185 of line or 188 upper thread I-beam wheel simultaneously and be installed in and carry out unwrapping wire on the upper thread bassinet stand; 3 monometallic silks are emitted by the heart yearn I-beam wheel and are passed through preceding heart yearn flywheel shaft wire-crossing wheel, forward and backward Flywheel disc and back heart yearn flywheel shaft wire-crossing wheel successively; Forward and backward heart yearn Flywheel disc rotates at a high speed with 5600r/min twists with the fingers into the core thigh with 3 monometallic silks; The core thigh is crossed from heart yearn tension force and is sent into line concentration mechanism through flywheel wire-crossing wheel, the second rear flywheel wire-crossing wheel and second flank line flywheel shaft wire-crossing wheel before the second face line flywheel shaft wire-crossing wheel, second successively after axle assembly is walked around two circles; 9 one metal wires are emitted by the upper thread I-beam wheel and are sent into line concentration mechanism simultaneously; Core thigh and 9 one metal wires together before fracture of wire check-out console, noseplate, pressing mold, the first front wires flywheel shaft wire-crossing wheel, first flywheel wire-crossing wheel, the first rear flywheel wire-crossing wheel sent into the sth. made by twisting assembly; Forward and backward upper thread Flywheel disc is with the rotating speed rotation of 2800r/min; 9 monometallic silks of core thigh and coating core thigh are twisted with the fingers into cord, through the haulage gear traction cord is further twisted with the fingers system through twisting with the fingers assembly, the cord of twisting with the fingers is regulated the Residual torsion and the glacing flatness of cord through swage; By electromagnetism strand oscillator winding displacement, take-up mechanism is received in the cord of twist with the fingers system on the deep bid I-beam wheel to meter counter counting back through regulating.
Claims (8)
1. special-purpose metal silk twisting machine; Crossing axle assembly, upper thread unwrapping wire assembly and take-up assembly by electric cabinet, heart yearn unwrapping wire assembly, heart yearn tension force is arranged in order and forms; Heart yearn unwrapping wire assembly and upper thread unwrapping wire assembly are by main drive of motor; It is characterized in that: be provided with the line concentration assembly in the said upper thread unwrapping wire assembly, said upper thread unwrapping wire assembly comprises forward and backward upper thread flywheel shaft assembly, forward and backward upper thread Flywheel disc, upper thread bassinet stand and a plurality of upper thread I-beam wheel, and main drive of motor connects forward and backward upper thread flywheel shaft assembly; The forward and backward upper thread flywheel shaft of forward and backward upper thread flywheel shaft assembly connects the two ends of upper thread bassinet stand respectively; A plurality of upper thread I-beam wheel are installed on the upper thread bassinet stand, and the upper thread bassinet stand is located between the forward and backward upper thread Flywheel disc, and forward and backward upper thread Flywheel disc connects forward and backward upper thread flywheel shaft respectively; Be equipped with two upper thread flywheel shaft wire-crossing wheels on the forward and backward upper thread flywheel shaft, the outer arc limit of forward and backward upper thread Flywheel disc all is arranged with two flywheel wire-crossing wheels; Said line concentration assembly comprises fracture of wire check-out console, noseplate and the pressing mold that all is connected in the upper thread bassinet stand.
2. special-purpose metal silk twisting machine according to claim 1; It is characterized in that: said heart yearn unwrapping wire assembly comprises forward and backward heart yearn flywheel shaft assembly, forward and backward heart yearn Flywheel disc, heart yearn bassinet stand and a plurality of heart yearn I-beam wheel; Main drive of motor connects forward and backward heart yearn flywheel shaft assembly; The forward and backward heart yearn flywheel shaft of forward and backward heart yearn flywheel shaft assembly connects the two ends of heart yearn bassinet stand respectively, and a plurality of heart yearn I-beam wheel are installed on the heart yearn bassinet stand, and the heart yearn bassinet stand is located between the forward and backward heart yearn Flywheel disc; Forward and backward heart yearn Flywheel disc connects forward and backward heart yearn flywheel shaft respectively, is equipped with heart yearn flywheel shaft wire-crossing wheel on the forward and backward heart yearn flywheel shaft.
3. special-purpose metal silk twisting machine according to claim 1 is characterized in that: the sth. made by twisting assembly excessively that is provided with the band variable-frequency motor between said upper thread unwrapping wire assembly and the take-up assembly.
4. special-purpose metal silk twisting machine according to claim 1 is characterized in that: said take-up assembly is made up of haulage gear, swage, meter counter, electromagnetism strand oscillator and take-up mechanism successively.
5. special-purpose metal silk twisting machine according to claim 1 is characterized in that: said main motor is through decelerator transmission heart yearn unwrapping wire assembly and upper thread unwrapping wire assembly, and decelerator is provided with velometer.
6. special-purpose metal silk twisting machine according to claim 2 is characterized in that: the outer arc face of said forward and backward heart yearn Flywheel disc connects the spring type brake.
7. special-purpose metal silk twisting machine according to claim 3, it is characterized in that: said variable-frequency motor has encoder.
8. according to claim 1 or 2 or 3 described special-purpose metal silk twisting machines, it is characterized in that: said heart yearn unwrapping wire assembly, upper thread unwrapping wire assembly and mistake sth. made by twisting assembly are arranged in the sound insulation safety guard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103900588A CN102493239A (en) | 2011-11-30 | 2011-11-30 | Special metal wire twisting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103900588A CN102493239A (en) | 2011-11-30 | 2011-11-30 | Special metal wire twisting machine |
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| Publication Number | Publication Date |
|---|---|
| CN102493239A true CN102493239A (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103900588A Pending CN102493239A (en) | 2011-11-30 | 2011-11-30 | Special metal wire twisting machine |
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| CN (1) | CN102493239A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965990A (en) * | 2012-11-20 | 2013-03-13 | 江阴市华方机电科技有限公司 | Novel pipeless steel wire rope stranding machine |
| CN103173902A (en) * | 2013-03-05 | 2013-06-26 | 江苏蛟龙重工集团有限公司 | High speed bow type double twisted stranding machine |
| CN103433747A (en) * | 2013-08-20 | 2013-12-11 | 上海冈茨电磁线圈有限公司 | Head scraping material cutting machine |
| CN103498371A (en) * | 2013-10-17 | 2014-01-08 | 贵州钢绳股份有限公司 | Steel wire rope stranding equipment with heating device |
| CN103498369A (en) * | 2013-10-17 | 2014-01-08 | 贵州钢绳股份有限公司 | Method and device for twisting double-layer sealing steel wire rope at one time |
| CN104233891A (en) * | 2014-09-15 | 2014-12-24 | 瑞安市华南电工设备有限公司 | Two-way steel wire rope strand twisting machine |
| CN104233890A (en) * | 2014-09-15 | 2014-12-24 | 瑞安市华南电工设备有限公司 | Two-way strand twisting device and center steel wire pay-off method |
| CN104264521A (en) * | 2014-09-15 | 2015-01-07 | 瑞安市华南电工设备有限公司 | Internal pay-off cradle assembly of stranding device |
| CN104769180A (en) * | 2012-12-11 | 2015-07-08 | 尼霍夫机器制造公司 | Braiding or stranding machine |
| CN106638070A (en) * | 2017-03-02 | 2017-05-10 | 李爱冰 | Forming device for hemp rope production |
| CN107268310A (en) * | 2017-06-27 | 2017-10-20 | 嘉善精田精密机械制造有限公司 | A kind of torsade device |
| CN108589355A (en) * | 2018-06-01 | 2018-09-28 | 瑞安市华南电工设备有限公司 | Steel wire core strand untwisting payingoff mechanism and its untwisting line-putting method |
| CN109338767A (en) * | 2018-12-03 | 2019-02-15 | 江苏兴达钢帘线股份有限公司 | A kind of production technology of the radial ply tyre steel wire cord of 2+7 × d structure |
| CN111636226A (en) * | 2020-05-19 | 2020-09-08 | 湖北三江航天江北机械工程有限公司 | Wind resistance reducing double-twisting machine take-up flywheel disc |
| CN113235319A (en) * | 2021-05-17 | 2021-08-10 | 江苏泰隆机电科技有限公司 | Double-twisting machine with intelligent over-twisting regulation function and regulation and control method thereof |
| CN115162038A (en) * | 2022-07-25 | 2022-10-11 | 宁波市祥宇机械有限公司 | Automatic change strander |
| CN115821611A (en) * | 2022-11-15 | 2023-03-21 | 宁波市祥宇机械有限公司 | Tubeless single strander |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965990A (en) * | 2012-11-20 | 2013-03-13 | 江阴市华方机电科技有限公司 | Novel pipeless steel wire rope stranding machine |
| CN104769180A (en) * | 2012-12-11 | 2015-07-08 | 尼霍夫机器制造公司 | Braiding or stranding machine |
| CN103173902A (en) * | 2013-03-05 | 2013-06-26 | 江苏蛟龙重工集团有限公司 | High speed bow type double twisted stranding machine |
| CN103173902B (en) * | 2013-03-05 | 2015-11-25 | 江苏蛟龙重工集团有限公司 | A kind of formula of bow is at a high speed two twists with the fingers stranding machine |
| CN103433747A (en) * | 2013-08-20 | 2013-12-11 | 上海冈茨电磁线圈有限公司 | Head scraping material cutting machine |
| CN103498371A (en) * | 2013-10-17 | 2014-01-08 | 贵州钢绳股份有限公司 | Steel wire rope stranding equipment with heating device |
| CN103498369A (en) * | 2013-10-17 | 2014-01-08 | 贵州钢绳股份有限公司 | Method and device for twisting double-layer sealing steel wire rope at one time |
| CN104233891A (en) * | 2014-09-15 | 2014-12-24 | 瑞安市华南电工设备有限公司 | Two-way steel wire rope strand twisting machine |
| CN104233890A (en) * | 2014-09-15 | 2014-12-24 | 瑞安市华南电工设备有限公司 | Two-way strand twisting device and center steel wire pay-off method |
| CN104264521A (en) * | 2014-09-15 | 2015-01-07 | 瑞安市华南电工设备有限公司 | Internal pay-off cradle assembly of stranding device |
| CN106638070A (en) * | 2017-03-02 | 2017-05-10 | 李爱冰 | Forming device for hemp rope production |
| CN107268310A (en) * | 2017-06-27 | 2017-10-20 | 嘉善精田精密机械制造有限公司 | A kind of torsade device |
| CN107268310B (en) * | 2017-06-27 | 2022-10-04 | 嘉善精田精密机械股份有限公司 | Rope twisting device |
| CN108589355A (en) * | 2018-06-01 | 2018-09-28 | 瑞安市华南电工设备有限公司 | Steel wire core strand untwisting payingoff mechanism and its untwisting line-putting method |
| CN109338767A (en) * | 2018-12-03 | 2019-02-15 | 江苏兴达钢帘线股份有限公司 | A kind of production technology of the radial ply tyre steel wire cord of 2+7 × d structure |
| WO2020113611A1 (en) * | 2018-12-03 | 2020-06-11 | 江苏兴达钢帘线股份有限公司 | Production process for radial tire steel cord having 2+7×d structure |
| CN111636226A (en) * | 2020-05-19 | 2020-09-08 | 湖北三江航天江北机械工程有限公司 | Wind resistance reducing double-twisting machine take-up flywheel disc |
| CN111636226B (en) * | 2020-05-19 | 2021-06-08 | 湖北三江航天江北机械工程有限公司 | Wind resistance reducing double-twisting machine take-up flywheel disc |
| CN113235319A (en) * | 2021-05-17 | 2021-08-10 | 江苏泰隆机电科技有限公司 | Double-twisting machine with intelligent over-twisting regulation function and regulation and control method thereof |
| CN115162038A (en) * | 2022-07-25 | 2022-10-11 | 宁波市祥宇机械有限公司 | Automatic change strander |
| CN115821611A (en) * | 2022-11-15 | 2023-03-21 | 宁波市祥宇机械有限公司 | Tubeless single strander |
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Application publication date: 20120613 |