CN204434819U - A kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs - Google Patents
A kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs Download PDFInfo
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- CN204434819U CN204434819U CN201520037358.1U CN201520037358U CN204434819U CN 204434819 U CN204434819 U CN 204434819U CN 201520037358 U CN201520037358 U CN 201520037358U CN 204434819 U CN204434819 U CN 204434819U
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- doffer
- bolster
- buffer unit
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- rate
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Abstract
The utility model discloses and a kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs, this doffer comprises the body containing movable frame, is provided with comb cylinder, also comprises buffer unit in movable frame, this buffer unit is connected on body, and buffer unit is positioned at the below of comb cylinder outlet.This doffer, when plug hole spool, can effectively prevent empty spool from being interrupted by the yarn stayed on spindle blade, improves rate of letting the hair grow, enhances productivity.
Description
Technical field
The utility model belongs to ring spinning apparatus technical field, specifically, relates to and a kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs.
Background technology
One is related to by the work of the spindle blade of fine spining machine on the empty spool sleeve that do not spin in tradition spun yarn work.Spindle blade leaves a few loop yarn line, so that spindle blade rotates upper for yarn winding empty spool during next round work, make empty spool become full spool.At present, in field of textiles, there is artificial intubate.Artificial intubate refers to be inserted empty spool on spindle blade by artificial mode.Because the control of artificial dynamics differs, the dynamics that empty spool often occurs to insert is excessive, thus the yarn stayed on spindle blade is interrupted by empty spool.So just need manually again yarn to be wrapped on spindle blade.Let the hair grow rate between 85% ~ 95% in artificial intubate.Artificial intubation way efficiency is low simultaneously, gradually for field of textiles is eliminated.At present, by automatic doffer intubate during comparatively advanced intubation way.Doffer comprises the body containing movable frame, is provided with comb cylinder in movable frame.Doffer is affiliated on fine spining machine by guide rail, and doffer is along in the process of guide rail movement, and full spool pulls up by the pipe device of grabbing of doffer, and empty spool inserts on the spindle blade of fine spining machine by comb cylinder.Empty spool falls along spindle blade.Because spindle blade has certain length, and the speed that empty spool falls increases gradually, makes empty spool may interrupt the yarn stayed on spindle blade.Let the hair grow rate between 70% ~ 90% in automatic doffer intubate, and when especially staying the yarn on spindle blade thinner, rate of letting the hair grow is lower, even lower.When the yarn that spindle blade leaves interrupts, just need the yarn of fracture to connect again, otherwise be enclosed within empty spool on spindle blade just can not effective winding yarn.Yarn interrupts the workload adding wiring to follow-up spun yarn work, lowers efficiency, affects output, causes unnecessary all kinds of wastes.
Summary of the invention
technical problem:technical problem to be solved in the utility model is: provide a kind of and effectively can improve the doffer of rate of letting the hair grow that doffs, this doffer, when plug hole spool, can effectively prevent empty spool from being interrupted by the yarn stayed on spindle blade, improves rate of letting the hair grow, enhances productivity.
technical scheme:for solving the problems of the technologies described above, the technical solution adopted in the utility model is:
Can effectively improve doffs lets the hair grow the doffer of rate, and this doffer comprises the body containing movable frame, is provided with comb cylinder, also comprises buffer unit in movable frame, and this buffer unit is connected on body, and buffer unit is positioned at the below of comb cylinder outlet.
Further, described buffer unit comprises bolster and bindiny mechanism, and bolster is connected on body by bindiny mechanism, and bolster is rotatable, and bolster one end is positioned at the below of comb cylinder outlet.
Further, described bolster is laminated structure, list structure, or planar structure.
Further, described bolster is for make buffer substrate tablet by flexible material.
Further, described bolster tilts to lay, and the higher one end of bolster is positioned at the below of comb cylinder outlet; The height on bolster distance ground, along doffer intubate direction of advance, uprises gradually.
Further, described bindiny mechanism comprises fixture, tumbler and bearing plate, and fixture is connected with bearing plate by tumbler, and fixture is fixedly connected on body, and bearing plate is fixedly connected with bolster.
Further, described can effectively improving is doffed the doffer of rate of letting the hair grow, and also comprise returning device, returning device is connected with buffer unit and body respectively, and returning device is used for after the work of plug hole spool completes, and is regained by bolster.
Further, described returning device is stay cord, and one end of this stay cord is fixedly connected on buffer unit, and the other end of stay cord is fixedly connected on movable frame.
Further, described stay cord is steel wire rope, or spindle band.
Further, described returning device is pneumatic cylinder, and this pneumatic cylinder is fixedly connected on body, and the piston rod of pneumatic cylinder is fixedly connected with buffer unit.
Further, described can effectively improving is doffed the doffer of rate of letting the hair grow, and also comprise catching device, this catching device is fixedly connected on body, and catching device is positioned at below buffer unit.
beneficial effect:compared with prior art, the technical solution of the utility model has following beneficial effect:
(1) effectively prevent empty spool from being interrupted by the yarn stayed on spindle blade, improve rate of letting the hair grow, enhance productivity.Doffer of the present utility model adds buffer unit.In the doffer course of work, empty spool inserts on the spindle blade of fine spining machine by comb cylinder, and in the process that empty spool falls, utilize buffer unit to cushion the falling speed of empty spool, empty spool departs from buffer unit, falls bottom spindle blade.This buffer unit reduces the falling speed of empty spool, and the probability of yarn empty spool being interrupted stay on spindle blade diminishes.Like this, when doffing, the rate of letting the hair grow of yarn is high, improves production efficiency.Adopt doffer of the present utility model, let the hair grow rate between 93% ~ 97%.
(2) work of doffer has continuity, does not need artificial dismounting buffer unit.Buffer unit of the present utility model comprises bolster and bindiny mechanism, and bolster is connected on body by bindiny mechanism, and bolster is rotatable.The utility model also comprises returning device, and returning device is connected with buffer unit and body respectively, and returning device is used for after the work of plug hole spool completes, and is regained by bolster.When doffer moves to fine spining machine end, when completing the work of grabbing full spool and plug hole spool, start returning device, make buffer unit near body.Like this, in the process of doffer return, buffer unit would not produce location conflicts with the full spool on spindle blade, makes doffer can be back to its original position on fine spining machine smoothly.In this process, do not need artificial unloading and buffer unit is installed, making the work of doffer have continuity, substantially increase the operational efficiency of equipment.
(3) compact conformation is simple.Returning device in the utility model can be stay cord, and one end of this stay cord is fixedly connected on buffer unit, and the other end is fixedly connected on movable frame.In doffer work, movable frame is also in loopy moving state back and forth.One end of stay cord is fixedly connected on movable frame, by the movement of movable frame, realizes buffer unit and be in the state of launching and packing up.When doffer moves to fine spining machine end, when completing the work of plug hole spool, movable frame moves to the side away from fine spining machine, thus drives buffer unit to be in collapsed state, avoids the full spool on buffer unit and spindle blade to produce and interferes.Returning device is set to stay cord, relies on the movement of movable frame, realize conversion buffer unit being in expansion and collapsed state, compact conformation is simple and practical.
Accompanying drawing explanation
Fig. 1 is structure side view of the present utility model.
Fig. 2 is the texture edge figure of the utility model on fine spining machine machine.
Position view when Fig. 3 is in running order on bolster in the utility model and fine spining machine, wherein, in figure, arrow represents doffer work direction of advance.
Fig. 4 is the first structural representation of bindiny mechanism in the utility model.
Fig. 5 is the second structural representation of bindiny mechanism in the utility model.
Fig. 6 is the third structural representation of bindiny mechanism in the utility model.
Have in figure: body 1, movable frame 101, comb cylinder 102, buffer unit 2, bolster 201, bindiny mechanism 202, fixture 2021, tumbler 2022, bearing plate 2023, returning device 3, fine spining machine 4, spindle blade 401, empty spool 5, catching device 6, yarn 7.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail.
As shown in Figure 1 to Figure 3, of the present utility modelly a kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs, comprise the body 1 containing movable frame 101, comb cylinder 102 is provided with in movable frame 101, also comprise buffer unit 2, this buffer unit 2 is connected on body 1, and buffer unit 2 is positioned at the below that comb cylinder 102 exports.
The doffer of said structure, in the doffer course of work, empty spool 5 inserts on the spindle blade 401 of fine spining machine by comb cylinder 102, in the process that empty spool 5 falls, utilize buffer unit 2 to cushion the falling speed of empty spool 5, empty spool 5 departs from buffer unit 2, falls bottom spindle blade 401.Buffer unit 2 is positioned at immediately below comb cylinder 102 outlet or oblique below.Buffer unit 2 because empty spool 5 will move a segment distance on spindle blade 401, just can contact with buffer unit 2, so can be arranged on the oblique below that comb cylinder 102 exports, as long as empty spool 5 can be fallen on buffer unit 2 along spindle blade 401.
Doffer of the present utility model, by arranging buffer unit 2, reduces the falling speed of empty spool 5, and the probability of the yarn 7 empty spool 5 being interrupted stay on spindle blade 401 diminishes.Like this, when doffing, the rate of letting the hair grow of yarn 7 is high, can enhance productivity.
Buffer unit 2 can be fixedly connected on body 1, and on-fixed connected mode also can be adopted to be connected on body 1.When employing is fixedly connected with mode, although in the process of doffer plug hole spool 5, buffer unit 2 can play buffering empty spool 5, reduce the effect of empty spool 5 falling speed, but when doffer return, buffer unit 2 and the empty spool 5 be inserted on spindle blade 401 produce location conflicts, make doffer cannot return, need artificial unloading's buffer unit 2, make doffer can be returned to the initial position on fine spining machine 4.
In order to solve the problem of constantly dismounting and installation buffer unit 2, the utility model preferably adopts on-fixed connected mode to be connected on body 1 by buffer unit 2.Buffer unit 2 comprises bolster 201 and bindiny mechanism 202, and bolster 201 is connected on body 1 by bindiny mechanism 202, and bolster 201 is rotatable, and bolster 201 one end is positioned at the below that comb cylinder 102 exports.
Bindiny mechanism 202 can be multiple conventional mechanical link.Such as, as shown in Figure 4, bindiny mechanism 202 comprises fixture 2021, tumbler 2022 and bearing plate 2023, and fixture 2021 is connected with bearing plate 2023 by tumbler 2022, fixture 2021 is fixedly connected on body 1, and bearing plate 2023 is fixedly connected with bolster 201.Like this, bolster 201 moving part 2022 that can rotate rotates.Tumbler 2022 can be torsion spring, hydraulic hinge, spring hinge, sliding support or air spring.Such as, in the structure of a kind of bindiny mechanism 202 that Fig. 5 provides, tumbler 2022 is hydraulic hinge, and bolster 201 is steel tendon.In the structure of a kind of bindiny mechanism 202 that Fig. 6 provides, tumbler 2022 is torsion spring, and bolster 201 is for make buffer board by flexible material.
When adopting above-mentioned on-fixed connected mode, described doffer also comprises returning device 3, and returning device 3 is connected with buffer unit 2 and body 1 respectively, and bolster 201, for after the work of plug hole spool completes, is regained by returning device 3.When doffer moves to fine spining machine 4 end, when completing the work of grabbing full spool and plug hole spool, start returning device 3, make buffer unit 2 near body 1, away from the spindle blade 401 of fine spining machine.Like this, in the process of doffer return, buffer unit 2 would not produce location conflicts with the full spool on spindle blade 401, makes doffer can be back to its original position on fine spining machine 4 smoothly.In this process, do not need artificial unloading and buffer unit 2 is installed, substantially increasing the operational efficiency of equipment.
Above-mentioned returning device 3 can have various structures to realize, as long as buffer unit 2 can be packed up by it, avoid full spool on buffer unit 2 and spindle blade 401 to produce to interfere, make doffer can get back to its original position on fine spining machine 4 smoothly along guide rail.Such as, returning device 3 is pneumatic cylinder, and this pneumatic cylinder is fixedly connected on body 1, and the piston rod of pneumatic cylinder is fixedly connected with buffer unit 2.By starting pneumatic cylinder, when stretching out piston rod, buffer unit 2 is in deployed condition, and now doffer is also in running order; When regaining piston rod, buffer unit 2 is in collapsed state, and now doffer is in return state.
Again such as, returning device is electric cylinder, and this electric cylinder is fixedly connected on movable frame or body, and the screw mandrel of electric cylinder is fixedly connected with bindiny mechanism.By starting electric cylinder, screw mandrel promotes buffer unit 2 and is in deployed condition, and now doffer is also in running order; When screw mandrel drives buffer unit 2 to pack up, now doffer is in return state.
As preferably, described returning device 3 is stay cord, and one end of this stay cord is fixedly connected on buffer unit 2, and the other end of stay cord is fixedly connected on movable frame 101.Due to doffer at work, movable frame 101 wherein is also in loopy moving state back and forth, so be fixedly connected on movable frame 101 by one end of stay cord, by the movement of movable frame 101, realizes buffer unit 2 and is in and launches and the state of packing up.
Before empty spool is discharged from comb cylinder 102, movable frame 101 moves to fine spining machine 4 direction on body 1.Like this, the stay cord being connected to movable frame 101 also moves thereupon, and the buffer unit 2 being connected to the stay cord other end, under the effect of self gravitation, is in deployed condition, near spindle blade 401.After having inserted empty spool, movable frame 101 has moved to away from fine spining machine 4 direction on body 1, thus drives buffer unit 2 to be in collapsed state.Circulate with this.When doffer moves to fine spining machine end, when completing the work of plug hole spool, movable frame 101 moves to the side away from fine spining machine, thus drives buffer unit 2 to be in collapsed state, avoids the full spool on buffer unit 2 and spindle blade 401 to produce and interferes.Described stay cord can be various material, such as steel wire rope, steel wire rope etc.Consider that in spinning environment, humidity is comparatively large, for extending the service life of stay cord, described stay cord is spindle band.
Further, the concrete structure shape of bolster 201 is not limit, as long as can limit the falling speed of empty spool 5 on spindle blade 401.As preferably, bolster 201 is laminated structure, list structure, or planar structure.Such as, bolster 201 can be steel tendon.Because there is multiple empty spool 4, bolster 201 needs to cushion all empty spools 4, so preferred bolster 201 is for be made up of flexible material.Such as, this flexible material is polyurethane rubber, natural resin, or timber.Along with the development of material technology, all can be used for making bolster 201 as long as can play to the falling speed of empty spool 5 material effectively cushioned, and be not limited to the above-mentioned several materials exemplified.
In the utility model, the laying of bolster 201 can be that level is laid, and also can be tilt to lay.When level is laid, in order to prevent the yarn 7 stayed on spindle blade 401 from rupturing, bolster 201 near the bottom of spindle blade 401, and is positioned at the top of yarn 7.Empty spool 5 can be made like this to be 0 from the starting velocity that bolster 201 falls, and the distance from bottom of bolster 201 and spindle blade 401 is comparatively near, makes empty spool 5 be not easy yarn 7 to interrupt.
Said structure Problems existing is, because bolster 201 is near the bottom of spindle blade 401, such empty spool 5 falls from spindle blade 401 top, comparatively large to the impact velocity of bolster 201, is unfavorable for the service life extending bolster 201.For head it off, the preferred bolster 201 of the utility model tilts to lay, and the higher one end of bolster 201 is positioned at the below that comb cylinder 102 exports; Bolster 201, uprises along doffer intubate direction of advance gradually apart from the height on ground.Like this, like this, the higher one end of bolster 201 is near the top of spindle blade 401, and the lower one end of bolster 201 is near the bottom of spindle blade 401, and the lower one end of bolster 201 is positioned at the top of yarn 7.When empty spool 5 falls from spindle blade 401 top, empty spool 5 drops down onto, then along with the movement of doffer, empty spool 5 moves along spindle blade 401 and bolster 201 simultaneously, and speed is even, until move to the lower one end of bolster 201, depart from bolster 201 again, drop down onto the bottom of spindle blade 401.Because the higher one end of bolster 201 is near the top of spindle blade 401, so empty spool 5 can not cause large impact to bolster 201.Because the lower one end of bolster 201 is near the bottom of spindle blade 401, so the empty spool 5 departed from from bolster 201 can not cause large impact to the yarn 7 stayed spindle blade 401.Like this, both made yarn 7 rupture easily, extended again the service life of bolster 201.
In order to avoid the empty spool of plug hole arbitrarily drops, doffer of the present utility model, also comprises catching device 6, and this catching device 6 is fixedly connected on body 1, and catching device 6 is positioned at below buffer unit 2.Catching device 6 is relative with the ring rail 402 of fine spining machine, and the distance between the ring rail 402 of catching device 6 and fine spining machine is less than the diameter of empty spool.Like this, when empty spool plug hole, catching device 6 can catch empty spool, avoids it arbitrarily to drop on the ground, is convenient to collect.
The method of work of the doffer of said structure, comprises the following steps:
Step 10): doffer is affiliated on fine spining machine 4 by guide rail, power-on switch and gas source switch, doffer moves along guide rail, and in moving process, full spool pulls up by the pipe device of grabbing of doffer, empty spool 5 inserts on the spindle blade 401 of fine spining machine by comb cylinder 102, in the process that empty spool 5 falls, utilize buffer unit 2 to cushion the falling speed of empty spool 5, buffer unit 2 moves with doffer, empty spool 5 departs from buffer unit 2, falls bottom spindle blade; Until doffer moves to fine spining machine 4 end, complete the work of grabbing full spool and plug hole spool.
In this method of work, utilize buffer unit 2 to cushion the falling speed of empty spool 5, make empty spool 5 depart from buffer unit 2, when falling bottom spindle blade, the yarn 7 stayed on spindle blade 401 can not be interrupted.In this process, when empty spool 5 is fallen on buffer unit 2, in the horizontal direction, empty spool 5 relative buffering device 2 slides backward; In the vertical direction, because spindle blade 401 is fixing, empty spool 5 can only slide downward, and after empty spool 5 is buffered, slide to buffer unit 2 end at leisure, relative spindle blade 401 distance from bottom is very little, can not cause the dialysis of yarn 7.
As preferably, in step 10), described buffer unit 2 comprises bolster, and bolster tilts to lay, and the higher one end of bolster is positioned at the below that comb cylinder 102 exports; The height on bolster distance ground, along doffer intubate direction of advance, uprises gradually; Bolster, near the spindle blade 401 of fine spining machine, makes empty spool 5 on spindle blade 401, first drops on bolster, then drop down onto the bottom of spindle blade 401.Because the higher one end of bolster 201 is near the top of spindle blade 401, so empty spool 5 can not cause large impact to bolster 201.Because the lower one end of bolster 201 is near the bottom of spindle blade 401, so the empty spool 5 departed from from bolster 201 can not cause large impact to the yarn 7 stayed spindle blade 401.Like this, both made yarn 7 rupture easily, extended again the service life of bolster 201.
In order to move to fine spining machine 4 end at doffer, when completing the work of grabbing full spool and plug hole spool, doffer can smoothly along guide rail return to the original position of fine spining machine 4, above-mentioned method of work also comprises step 20): after step 10), returning device 3 is utilized to be packed up by buffer unit 2, buffer unit 2 and the full spool be inserted on spindle blade 401 are not interfered, and then doffer is back to the original position of fine spining machine along guide rail.
Described step 20) in, described returning device 3 is spindle band, and one end of this spindle band is fixedly connected on buffer unit 2, and the other end is fixedly connected on movable frame 101.
The work of doffer is constantly circulation, and in order to provide operating efficiency, above-mentioned method of work also comprises step 30): in step 20) terminate after, circulation step 10) and step 20), until doffer quits work.
More than show and describe general principle of the present utility model, principal character and advantage.Those skilled in the art should understand; the utility model is not by the restriction of above-mentioned specific embodiment; description in above-mentioned specific embodiment and description is just in order to further illustrate principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by claims and equivalent thereof.
Claims (11)
1. one kind effectively can be improved the doffer of rate of letting the hair grow that doffs, this doffer comprises the body (1) containing movable frame (101), comb cylinder (102) is provided with in movable frame (101), it is characterized in that, also comprise buffer unit (2), this buffer unit (2) is connected on body (1), and buffer unit (2) is positioned at the below that comb cylinder (102) exports.
2. effectively can improve according to according to claim 1 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described buffer unit (2) comprises bolster (201) and bindiny mechanism (202), bolster (201) is connected on body (1) by bindiny mechanism (202), bolster (201) is rotatable, and bolster (201) one end is positioned at the below that comb cylinder (102) exports.
3. effectively can improve according to according to claim 2 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described bolster (201) is laminated structure, list structure, or planar structure.
4. effectively can improve according to according to claim 2 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described bolster (201) is for make buffer substrate tablet by flexible material.
5. effectively can improve according to according to claim 2 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described bolster (201) tilts to lay, and the higher one end of bolster (201) is positioned at the below that comb cylinder (102) exports; The height on bolster (201) distance ground, along doffer intubate direction of advance, uprises gradually.
6. effectively can improve according to according to claim 2 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described bindiny mechanism (202) comprises fixture (2021), tumbler (2022) and bearing plate (2023), fixture (2021) is connected with bearing plate (2023) by tumbler (2022), fixture (2021) is fixedly connected on body (1), and bearing plate (2023) is fixedly connected with bolster (201).
7. to doff the doffer of rate of letting the hair grow according to can effectively improve in claim 2 to 6 described in any one, it is characterized in that, also comprise returning device (3), returning device (3) is connected with buffer unit (2) and body (1) respectively, bolster (201), for after the work of plug hole spool completes, is regained by returning device (3).
8. effectively can improve according to according to claim 7 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described returning device (3) is stay cord, and one end of this stay cord is fixedly connected on buffer unit (2), and the other end of stay cord is fixedly connected on movable frame (101).
9. effectively can improve according to according to claim 8 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described stay cord is steel wire rope, or spindle band.
10. effectively can improve according to according to claim 7 the doffer of rate of letting the hair grow that doffs, it is characterized in that, described returning device (3) is pneumatic cylinder, and this pneumatic cylinder is fixedly connected on body (1), and the piston rod of pneumatic cylinder is fixedly connected with buffer unit (2).
11. effectively can improve according to according to claim 1 the doffer of rate of letting the hair grow that doffs, and it is characterized in that, also comprise catching device (6), this catching device (6) is fixedly connected on body (1), and catching device (6) is positioned at buffer unit (2) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037358.1U CN204434819U (en) | 2015-01-20 | 2015-01-20 | A kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037358.1U CN204434819U (en) | 2015-01-20 | 2015-01-20 | A kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs |
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| CN204434819U true CN204434819U (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520037358.1U Withdrawn - After Issue CN204434819U (en) | 2015-01-20 | 2015-01-20 | A kind ofly effectively can improve the doffer of rate of letting the hair grow that doffs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499126A (en) * | 2015-01-20 | 2015-04-08 | 铜陵松宝智能装备股份有限公司 | Doffing machine capable of effectively improving doffing tailing rate and work method thereof |
-
2015
- 2015-01-20 CN CN201520037358.1U patent/CN204434819U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499126A (en) * | 2015-01-20 | 2015-04-08 | 铜陵松宝智能装备股份有限公司 | Doffing machine capable of effectively improving doffing tailing rate and work method thereof |
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Granted publication date: 20150701 Effective date of abandoning: 20170822 |
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