CN113529259B - Dynamic balance tension traction mechanism and knitting machine with same - Google Patents
Dynamic balance tension traction mechanism and knitting machine with same Download PDFInfo
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- CN113529259B CN113529259B CN202110818872.9A CN202110818872A CN113529259B CN 113529259 B CN113529259 B CN 113529259B CN 202110818872 A CN202110818872 A CN 202110818872A CN 113529259 B CN113529259 B CN 113529259B
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- rotating shaft
- tension
- transmission
- sheets
- winding
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/88—Take-up or draw-off devices for knitting products
Abstract
The invention relates to a dynamic balance tension traction mechanism and a knitting machine with the same, wherein the dynamic balance tension traction mechanism comprises a rotating shaft, a tension adjusting mechanism, a plurality of groups of transmission sheets and winding wheels which are in one-to-one correspondence, the transmission sheets are round sheets, the middle parts of the transmission sheets are coaxially provided with shaft holes, the plurality of groups of transmission sheets are respectively sleeved on the rotating shaft, the tension adjusting mechanism is arranged on the rotating shaft and is respectively connected with the plurality of groups of transmission sheets and is used for adjusting the balance between the transmission sheets and the rotating shaft, the middle parts of the plurality of groups of winding wheels are coaxially provided with assembling holes and are respectively coaxially sleeved outside the corresponding transmission sheets, an elastic element is connected between each winding wheel and the corresponding transmission sheet, when the transmission sheets and the winding wheels rotate relatively, the elastic elements are synchronously compressed, and the outer edge of each winding wheel is provided with hook-pull teeth at intervals along the circumferential direction of the winding wheel. The advantages are that: the structure design is simple, the parts are easy to replace, the traction force can be automatically adjusted according to different coil wale lengths, the traction tension acting on each coil wale is stable, uniform and consistent, and the tension adjusting function is good.
Description
Technical Field
The invention relates to the field of textiles, in particular to a dynamic balance tension traction mechanism and a knitting machine with the same.
Background
The common drawing and winding mechanism for weft knitting machine is to fix one end of fabric onto drawing roller, and to apply certain drawing tension to the fabric via the holding of the drawing roller and the rotation of the roller before winding into package of certain form and capacity. In this process, all the wales are subjected to the same drawing tension with the rotation of the drawing roller, which causes the loops of different lengths to be subjected to a greater or lesser drawing tension than that required by the loops themselves, thereby forming a larger or smaller loop.
According to different driving modes of the traction roller, the traction winding mechanism of the circular knitting machine has three modes of mechanical continuous traction, mechanical intermittent traction and continuous traction of driving the traction roller by a direct-current torque motor.
The mechanical continuous drawing is that the power of the main shaft is transmitted to the drawing roller through a series of transmission parts, the needle cylinder rotates for one circle, and no matter the length of the fabric formed by weaving, the drawing roller always rotates for a certain angle to draw a certain amount of fabric.
The mechanical intermittent drawing is that the power of the main shaft is transmitted to a spring through a series of transmission mechanisms, and the drawing roller can rotate to draw the fabric only when the rotation moment generated by the elastic restoring force of the spring on the drawing roller is larger than the tension moment generated by the fabric on the drawing roller, such as a gear type drawing and coiling mechanism.
The continuous drawing of the DC torque motor driving the drawing roller adopts a method of adjusting the drawing tension by taking a torque motor as power, and a potentiometer is used on the machine to adjust the armature current, so that the drawing tension can be set and changed at any time, and a dial of the potentiometer displays the drawing tension value.
In summary, the pulling and winding mechanisms pull and wind the knitted fabric into a package by using different principles, but no matter how high each stitch is, each row of stitches are subjected to equal pulling tension in the pulling process, and the pulling roller cannot finely treat each stitch, so that the formed fabric cannot achieve the expected effect, and the knitted fabric presents the phenomenon of bow-shaped bending deformation of the courses. Therefore, the control of the drawing tension of each coil is very important in the drawing and winding process.
Disclosure of Invention
The invention aims to provide a dynamic balance tension traction mechanism and a knitting machine with the same, and effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a dynamic balance tension drawing mechanism comprises a rotating shaft, a tension adjusting mechanism, a plurality of groups of transmission sheets and a winding wheel, wherein the transmission sheets are round sheets, the middle parts of the transmission sheets are coaxially provided with shaft holes, the transmission sheets are respectively sleeved on the rotating shaft, the tension adjusting mechanism is arranged on the rotating shaft and is respectively connected with the transmission sheets and used for adjusting the balance of the transmission sheets and the rotating shaft, so that the transmission sheets and the rotating shaft rotate in a linkage manner or generate relative rotation under the influence of external force, the middle parts of the winding wheels are coaxially provided with assembling holes and are respectively coaxially sleeved outside the corresponding transmission sheets, an elastic element is connected between the winding wheel and the corresponding transmission sheets, when the transmission sheets and the winding wheel rotate relative to each other, the elastic elements are synchronously compressed, and hook-pull teeth are arranged at intervals along the circumferential direction of the winding wheel.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the inner diameter of the driving strap is equal to the outer diameter of the rotation shaft, and the inner diameter of the winding wheel is equal to the outer diameter of the driving strap.
Further, the tension adjusting mechanism includes a pressure adjusting block and a pressure adjusting member, a cavity is formed in the rotating shaft along the axial direction thereof, a liquid filling port with a plug is formed at one end of the rotating shaft, the liquid filling port is communicated with the cavity, a strip-shaped gap is formed in the surface of the rotating shaft along the axial direction thereof, the strip-shaped pressure adjusting block is hermetically assembled in the strip-shaped gap, the driving pieces are respectively sleeved on the shaft sections where the pressure adjusting blocks are located and are in contact with the pressure adjusting block, a pressure adjusting hole is formed in the surface of one end of the rotating shaft and is communicated with the cavity, the pressure adjusting member is assembled in the pressure adjusting hole and is used for adjusting the pressure inside the cavity of the rotating shaft, and the pressure adjusting block can move in the radial direction of the rotating shaft under the change of the pressure inside the rotating shaft, so as to adjust the friction force between the pressure adjusting block and the driving pieces, and realize the balance adjustment of the driving pieces and the rotating shaft.
Further, the pressure adjusting hole is a screw hole provided along the radial direction of the rotating shaft, and the pressure adjusting member is a nut fitted to the screw hole.
Furthermore, the outer edge of the driving sheet is provided with an assembly notch along the circumferential direction, the inner edge of the winding wheel is provided with a positioning part extending into the corresponding assembly notch of the driving sheet, and the elastic part is arranged in the corresponding assembly notch and connected between the positioning part and one end of the assembly notch.
Further, the elastic member is a compression spring, and two ends of the elastic member are respectively connected between the positioning portion and one end of the assembling notch.
Further, a spacer is integrally formed on one surface of the driving strap, and the spacer is coaxial with the driving strap, and the outer diameter of the spacer is larger than that of the body of the driving strap.
Further, the assembly notch is a sector annular notch coaxial with the transmission piece, and the positioning portion is a sector annular structure coaxial with the winding wheel.
Furthermore, the winding wheel is a ratchet wheel, the ratchet teeth of the winding wheel form the hooking teeth, and the tip ends of the ratchet teeth are chamfered to form round corners.
The beneficial effects are that: the structure design is simple, the parts are easy to replace, the traction force can be automatically adjusted according to different coil wale lengths, the traction tension acting on each coil wale is stable, uniform and consistent, and the tension adjusting function is good.
A knitting machine is also provided that includes a dynamically balanced tension puller mechanism.
Drawings
FIG. 1 is a schematic structural view of a dynamic balance tension pulling mechanism of the present invention;
FIG. 2 is a cross-sectional view of the rotating shaft of the dynamically balanced tension-pulling mechanism of the present invention;
FIG. 3 is a schematic structural diagram of a driving strap in the dynamic balance tension pulling mechanism of the present invention;
fig. 4 is a schematic structural view of a take-up pulley in the dynamic balance tension pulling mechanism of the invention.
In the drawings, the reference numbers indicate the following list of parts:
1. a rotating shaft; 2. a transmission sheet; 3. a take-up reel; 4. an elastic member; 5. a pressure regulating block; 6. a pressure regulating member; 11. a liquid filling port; 21. assembling a notch; 22. a separator; 31. a positioning part.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the dynamic balance tension pulling mechanism of the present embodiment includes a rotating shaft 1, a tension adjusting mechanism, a plurality of sets of driving strips 2 and winding wheels 3 corresponding to each other one by one, wherein the driving strips 2 are circular sheets, and have a shaft hole coaxially formed at the middle thereof, the plurality of sets of driving strips 2 are respectively sleeved on the rotating shaft 1, the tension adjusting mechanism is mounted on the rotating shaft 1 and is respectively connected to the plurality of sets of driving strips 2 for adjusting the balance between the driving strips 2 and the rotating shaft 1, so that the driving strips 2 are rotated in a linked manner or relatively rotated with respect to the rotating shaft 1 under the influence of an external force, a plurality of sets of winding wheels 3 have assembling holes coaxially formed at the middle thereof and are respectively coaxially sleeved outside the corresponding driving strips 2, an elastic member 4 is connected between the winding wheel 3 and the corresponding driving strips 2, and when the winding wheels are rotated relatively, the elastic member 4 is synchronously compressed, and the outer edge of the winding wheel 3 is provided with hooking teeth at intervals along the circumferential direction thereof.
The operation method of the dynamic balance tension pulling roll comprises the following steps:
the linkage force between the transmission sheet 2 and the rotating shaft 1 is adjusted by operating the tension adjusting mechanism (namely, the relative rotation state of the transmission sheet and the rotating shaft under the influence of a certain external force), when winding, the rotating shaft 1 drives the transmission sheet 2 to rotate anticlockwise, the transmission sheet 2 drives the winding wheels 3 to rotate in a linkage manner (anticlockwise) through the elastic pieces 4, so that the pulling and winding of the coil corresponding to each winding wheel 3 are controlled (in the winding process, the hooking and pulling teeth on the peripheries of the winding wheels 3 hook corresponding longitudinal rows of the coil), when the yarn tension is gradually increased, the elastic pieces 4 are gradually compressed to play a role in adjusting the pulling tension of the coil, when the pulling tension of the coil reaches the 'connecting force' between the tension adjusting mechanism and the transmission sheet 2, the transmission sheet 2 slides (namely, the transmission sheet slips and realizes the relative rotation), in this state, the winding wheel 3 does not roll the coil, because the rotating shaft 1 always rotates anticlockwise, the relative sliding (rotation) between the transmission sheet 2 and the rotating shaft 1 can control the transmission sheet 2 not rotate clockwise, thereby achieving the same winding tension of each row of the coil, when weaving forming, the coil does not break, the pulling and the whole pulling and the coil can be adjusted according to the simple structure, the easy-to change of the tension adjusting mechanism, so that the pulling and the pulling mechanism can be uniform.
Preferably, the inner diameter of the driving strap 2 is equal to the outer diameter of the rotation shaft 1, and the inner diameter of the winding wheel 3 is equal to the outer diameter of the driving strap 2.
In the scheme, the transmission sheet 2 and the rotating shaft 1 and the transmission sheet 2 and the coiling wheel 3 are assembled very compactly, almost have no clearance, have a good operation state and cannot generate large-scale movement.
More specifically, as shown in fig. 1 and 2, the tension adjusting mechanism includes a pressure adjusting block 5 and a pressure adjusting member 6, a cavity is formed in the rotating shaft 1 along the axial direction thereof, a liquid filling port 11 with a seal is formed at one end of the rotating shaft 1 and communicates with the cavity, a strip-shaped slit is formed in the surface of the rotating shaft 1 along the axial direction thereof and communicates with the cavity, the pressure adjusting block 5 is sealingly assembled in the strip-shaped slit, the driving plates 2 are respectively sleeved on the shaft sections of the rotating shaft 1 where the pressure adjusting blocks 5 are located and contact with the pressure adjusting block 5, a pressure adjusting hole is formed in the surface of one end of the rotating shaft 1 and communicates with the cavity, the pressure adjusting member 6 is assembled in the pressure adjusting hole to adjust the pressure in the cavity of the rotating shaft 1, and the pressure adjusting block 5 is movable in the radial direction of the rotating shaft 1 under the change of the pressure in the rotating shaft 1, so as to adjust the friction force between the pressure adjusting block 5 and the rotating shaft 2, thereby achieving the balance adjustment of the driving plates 2 and the rotating shaft 1.
In the scheme, the specific adjusting process is as follows:
filling liquid into the cavity in the rotating shaft 1 through the liquid filling opening 11, then sealing the plug (which can be a threaded plug, etc., and the plug is realized by threaded connection), and then adjusting the pressure adjusting piece 6 to change the internal pressure of the rotating shaft 1, so that the pressure adjusting block 5 is forced to protrude outwards slightly, and the maximum static friction force (namely the maximum yarn tension) between the pressure adjusting block 5 and the transmission piece 2 is set or adjusted; when the yarn winding machine is wound, the rotating shaft 1 controls the transmission piece 2 to rotate anticlockwise through the pressure adjusting block 5, the transmission piece 2 drives the winding wheel 3 to rotate, so that the traction of each coil is controlled to be wound, when the yarn tension is gradually increased, the elastic piece 4 is gradually compressed, the effect of adjusting the coil traction tension is achieved, when the coil traction tension reaches the maximum static friction force between the pressure adjusting block 5 and the transmission piece 2, the pressure adjusting block 5 and the transmission piece 2 start to slide, the winding wheel 3 does not pull and wind the coil, the rotating shaft 1 rotates anticlockwise all the time, and the sliding friction force between the pressure adjusting block 5 and the transmission piece 2 can control the transmission piece 2 not to rotate clockwise. Therefore, the winding tension of each row of the coils is the same, and the coils can not be broken when the forming fabric is woven.
As a preferred embodiment, a plurality of strip gaps are preferably designed and uniformly distributed at intervals along the circumferential direction of the rotating shaft 1, and a pressure adjusting block 5 is arranged in each strip gap, so that during adjustment, the pressure adjusting blocks 5 are uniformly contacted with the inner side of the transmission piece 2 at multiple points, the stress is uniform, and the adjustment effect is better.
In a preferred embodiment, the pressure adjusting holes are screw holes provided along the radial direction of the rotating shaft 1, and the pressure adjusting member 6 is a nut fitted to the screw holes.
In this embodiment, the pressure adjusting part 6 is adjusted in a screwing mode, is simple to operate, has higher precision and is beneficial to fine operation.
As a preferred embodiment, as shown in fig. 3, the outer edge of the driving strap 2 is provided with an assembly notch 21 along the circumferential direction thereof, the inner edge of the winding wheel 3 is provided with a positioning portion 31 extending into the corresponding assembly notch 21 of the driving strap 2, and the elastic member 4 is disposed in the corresponding assembly notch 21 and connected between the positioning portion 31 and one end of the assembly notch 21.
In this embodiment, elastic component 4 device is between assembly breach 21 and location portion 31, and overall structure is compacter to, when coil tension crescent, elastic component 4 can play the balanced purpose between balanced drive strap 2 and the coiling wheel 3, plays certain cushioning effect to a certain extent, and simultaneously, elastic component 4 leaks hardly, and structural design is more reasonable.
Preferably, the elastic member 4 is a compression spring, and both ends thereof are connected between the positioning part 31 and one end of the fitting notch 21.
As a preferred embodiment, as shown in fig. 3, a spacer 22 is integrally formed on one surface of the transmission strap 2 coaxially therewith, and the outer diameter of the spacer 22 is larger than the outer diameter of the main body of the transmission strap 2.
In this embodiment, 2 one sides of driving strap design spacer 22 for can separate each other through spacer 22 between two take-up pulley 3, can not interfere with each other, and, the design of spacer 22 makes elastic component 4 in two sets of driving strap 2 keep apart each other, when the pressurized, can not contact each other and produce the interference, ensures elastic component 4 and take-up pulley 3 and driving strap 2 independent operation, mutual noninterference.
As a preferred embodiment, as shown in fig. 3 and 4, the fitting notch 21 is a fan-shaped notch coaxial with the driving strap 2, and the positioning portion 31 is a fan-shaped structure coaxial with the winding wheel 3.
In the scheme, the assembly notch 21 is reasonable in shape design, and the structure is compact and attractive in assembly.
Preferably, the winding wheel 3 is a ratchet wheel, the teeth of which constitute the pull teeth, and the tips of the teeth are rounded.
Example 2
This embodiment provides a knitting machine including the dynamic balance tension pulling mechanism of embodiment 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A dynamic balance tension traction mechanism is characterized in that: the tension adjusting mechanism is arranged on the rotating shaft (1) and is respectively connected with the plurality of groups of transmission sheets (2) for adjusting the balance between the transmission sheets (2) and the rotating shaft (1) so that the transmission sheets (2) and the rotating shaft (1) can rotate in a linkage manner or relatively rotate under the influence of external force, the plurality of groups of winding wheels (3) are coaxially provided with assembling holes in the middle and are respectively coaxially sleeved outside the corresponding transmission sheets (2), an elastic piece (4) is connected between each winding wheel (3) and the corresponding transmission sheet (2), and when the winding wheels (3) and the corresponding transmission sheets (2) rotate relatively, the elastic pieces (4) are synchronously compressed, and the outer edge of each winding wheel (3) is provided with pulling teeth at intervals along the circumferential direction; the inner diameter of the transmission sheet (2) is equal to the outer diameter of the rotating shaft (1), and the inner diameter of the winding wheel (3) is equal to the outer diameter of the transmission sheet (2); tension adjustment mechanism includes pressure adjustment block (5) and pressure adjustment spare (6), revolving axle (1) is inside to be equipped with the cavity along its axial, revolving axle (1) one end is equipped with liquid pouring mouth (11) rather than the area shutoff of cavity intercommunication, revolving axle (1) surface is equipped with the bar gap rather than the cavity intercommunication along its axial, sealed in the bar gap is equipped with the bar pressure adjustment block (5), driving plate (2) overlap respectively and locate the shaft section at pressure adjustment block (5) place, and with pressure adjustment block (5) contact, revolving axle (1) one end surface is equipped with the pressure adjustment hole of its cavity of intercommunication, pressure adjustment spare (6) assemble in pressure adjustment hole department is used for adjusting the cavity internal pressure of revolving axle (1), pressure adjustment block (5) can be in revolving axle (1) internal pressure changes down, for the radial movement of revolving axle (1), thereby adjust pressure adjustment block (5) with the frictional force between driving plate (2), realize the balanced regulation of driving plate (2) and revolving axle (1).
2. A dynamically balanced tension pulling mechanism as claimed in claim 1, wherein: the pressure adjusting holes are screw holes which are radially arranged along the rotating shaft (1), and the pressure adjusting pieces (6) are nuts matched with the screw holes.
3. A dynamically balanced tension pulling mechanism as claimed in claim 1, wherein: the outer edge of the transmission piece (2) is provided with an assembly notch (21) along the circumferential direction, the inner edge of the winding wheel (3) is provided with a positioning part (31) extending into the corresponding assembly notch (21) of the transmission piece (2), and the elastic part (4) is arranged in the corresponding assembly notch (21) and connected between the positioning part (31) and one end of the assembly notch (21).
4. A dynamically balanced tension pulling mechanism as claimed in claim 3, wherein: the elastic piece (4) is a pressure spring, and two ends of the elastic piece are respectively connected between the positioning part (31) and one end of the assembly notch (21).
5. A dynamically balanced tension pulling mechanism as claimed in claim 4, wherein: one side integrated into one piece of driving strap (2) is equipped with rather than coaxial spacer (22), the external diameter of spacer (22) is greater than the external diameter of the body of driving strap (2).
6. A dynamically balanced tension pulling mechanism according to any one of claims 3 to 5, wherein: the assembling gap (21) is a fan-shaped annular gap coaxial with the transmission sheet (2), and the positioning part (31) is of a fan-shaped annular structure coaxial with the coiling wheel (3).
7. A dynamically balanced tension pulling mechanism according to any one of claims 1 to 5, wherein: the coiling wheel (3) is a ratchet wheel, the ratchet teeth of the coiling wheel form the hooking teeth, and the tip ends of the ratchet teeth are chamfered with round corners.
8. A knitting machine characterized by: comprising a dynamically balanced tension pulling mechanism as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110818872.9A CN113529259B (en) | 2021-07-20 | 2021-07-20 | Dynamic balance tension traction mechanism and knitting machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110818872.9A CN113529259B (en) | 2021-07-20 | 2021-07-20 | Dynamic balance tension traction mechanism and knitting machine with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113529259A CN113529259A (en) | 2021-10-22 |
| CN113529259B true CN113529259B (en) | 2023-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110818872.9A Active CN113529259B (en) | 2021-07-20 | 2021-07-20 | Dynamic balance tension traction mechanism and knitting machine with same |
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| Country | Link |
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| CN (1) | CN113529259B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2174489Y (en) * | 1993-05-04 | 1994-08-17 | 蔡长源 | Variable-speed cloth rewinder for circular knitting machine |
| US6000246A (en) * | 1998-06-02 | 1999-12-14 | Hsieh; Wen-Bin | Stepless speed change type cloth take-up device for a circular knitting machine |
| TW465590U (en) * | 2000-08-22 | 2001-11-21 | Wen-Chi Juang | Improved mechanism for transmission of cloth winding machine |
| TW497626U (en) * | 2001-09-11 | 2002-08-01 | Jin-Yung Lin | Follower cloth-winding device for circular weaving machine |
| CN204661981U (en) * | 2015-05-26 | 2015-09-23 | 福建泉州凹凸精密机械有限公司 | A kind of cloth-winding mechanism for circular knitting machine |
| CN206438259U (en) * | 2016-11-17 | 2017-08-25 | 圣东尼（上海）针织机器有限公司 | A kind of draw-off mechanism of circular knitter |
| CN209652538U (en) * | 2019-01-26 | 2019-11-19 | 浙江恒隆芳纶科技有限公司 | A kind of drawing spooler of circular knitting machine |
| CN209652536U (en) * | 2019-01-26 | 2019-11-19 | 浙江恒隆芳纶科技有限公司 | A kind of drawing spooler of large circle machine |
-
2021
- 2021-07-20 CN CN202110818872.9A patent/CN113529259B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2174489Y (en) * | 1993-05-04 | 1994-08-17 | 蔡长源 | Variable-speed cloth rewinder for circular knitting machine |
| US6000246A (en) * | 1998-06-02 | 1999-12-14 | Hsieh; Wen-Bin | Stepless speed change type cloth take-up device for a circular knitting machine |
| TW465590U (en) * | 2000-08-22 | 2001-11-21 | Wen-Chi Juang | Improved mechanism for transmission of cloth winding machine |
| TW497626U (en) * | 2001-09-11 | 2002-08-01 | Jin-Yung Lin | Follower cloth-winding device for circular weaving machine |
| CN204661981U (en) * | 2015-05-26 | 2015-09-23 | 福建泉州凹凸精密机械有限公司 | A kind of cloth-winding mechanism for circular knitting machine |
| CN206438259U (en) * | 2016-11-17 | 2017-08-25 | 圣东尼（上海）针织机器有限公司 | A kind of draw-off mechanism of circular knitter |
| CN209652538U (en) * | 2019-01-26 | 2019-11-19 | 浙江恒隆芳纶科技有限公司 | A kind of drawing spooler of circular knitting machine |
| CN209652536U (en) * | 2019-01-26 | 2019-11-19 | 浙江恒隆芳纶科技有限公司 | A kind of drawing spooler of large circle machine |
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