CN103088482A - Method for manufacturing special yarn - Google Patents

Method for manufacturing special yarn Download PDF

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Publication number
CN103088482A
CN103088482A CN2012104352123A CN201210435212A CN103088482A CN 103088482 A CN103088482 A CN 103088482A CN 2012104352123 A CN2012104352123 A CN 2012104352123A CN 201210435212 A CN201210435212 A CN 201210435212A CN 103088482 A CN103088482 A CN 103088482A
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speed
roller
rotary speed
spinning
front roller
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CN2012104352123A
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CN103088482B (en
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槌田大辅
小岛直树
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Toyota Industries Corp
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Toyoda Automatic Loom Works Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62Manufacturing 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

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Abstract

The invention relates to a method for manufacturing a special yarn. Provided is a method for manufacturing a special yarn by using a fine spinning machine. The special yarn comprises neps which are formed by parts which are thicker than parts of a reference thickness. The fine spinning machine comprises a drafting part, wherein a front roller and a rear roller in the drafting part are driven to rotate by different variable frequency motors. The method comprises the following steps of reducing the rotation speed of the front roller and the rear roller temporally so as to reduce a spinning speed to be lower than a normal spinning speed without changing the thickness of the yarn before the neps are formed, and executing formation of the neps in a state when the spinning speed is reduced to a speed that is lower than the normal spinning speed.

Description

Produce the method for special yarn
Technical field
The present invention relates to produce the method for special yarn, and more specifically, relate to the method for the production of the special yarn that is called as a yarn or fancy yarns, this yarn or fancy yarns have inhomogeneous thickness and comprise the card nailing neps that is formed by the part thicker than the part with reference thickness.
Background technology
Produce special yarn by the rotary speed that changes front roller and rear roller and the draw ratio that temporarily reduces front roller and rear roller.Usually, the minimum length of card nailing neps is approximately identical with fibre length.As known in the art is that using the material that comprises staple fibre is effective when producing the undercoat grain.It is also known that in this area, front bottom roll and rear bottom roll are in the unexpected increase of the rotary speed on short time length and to reduce when producing the undercoat grain be effective.
In the prior art, as shown in Figure 7, the publication application 62-162031 of Japan has described a kind of process units of special yarn, its when forming the undercoat grain provisionally the rotary speed of front roller be set to be zero and provisionally the rotary speed of front roller is reduced to the value close with the rotary speed of rear roller when production is become mildewed.In the process units of the publication application 62-152031 of Japan, front roller and rear roller are driven by different variable speed motor.In addition, two gear drives and two electromagnetic clutchs will rotate from the variable speed motor of correspondence and be delivered to front roller.When these two electromagnetic clutchs were in deactivation status, perhaps during not-connected status, the rotation that is produced by this variable speed motor was not passed to front roller.When two electromagnetic clutchs all were in state of activation, perhaps during connection status, the rotation that is produced by variable speed motor was with than only there being a speed that reduces when being activated to be passed to front roller in described electromagnetic clutch.The connection of described two electromagnetic clutchs is controlled selectively with not being connected, thereby produces undercoat grain and the grain that becomes mildewed.When forming the undercoat grain, the rotation of front roller is stopped provisionally.
Suddenly increase and the rotary speed that reduces front roller has caused the labyrinth of machine and increased the cost of machine with electromagnetic clutch and gear drive.In addition, under normal spinning speed (15-30m/min), when the speed that only changes variable speed motor with by front roller being slowed down and when accelerating to form the undercoat grain, just requiring variable speed motor to have very large ability.And the transmission device of drive system also is required to have the intensity that increases.
Summary of the invention
A target of the present invention is to provide a kind of method that production comprises the special yarn of undercoat grain, and does not reduce productivity and do not need electric clutch, and this is used to increase and reduce suddenly the rotary speed of front roller, and perhaps the motor of large ability, form the undercoat grain.
One aspect of the present invention is a kind of for produce the method for special yarn with spinning frame, it comprises the card nailing neps that is formed by the part thicker than the part with reference thickness, wherein spinning frame comprises the drawing-off part, and front roller and rear roller are by different variable speed motor rotations in the drawing-off part.The rotary speed that the method comprises the steps: to reduce provisionally front roller and rear roller is spinning speed is reduced to lower than the speed of normal spinning speed but do not change the thickness of yarn before card nailing neps forms, and carries out card nailing neps from the state that spinning speed wherein is lowered to described speed lower than normal spinning speed and form.
Above method is from the different of prior art, forms card nailing neps by unexpected increase and the rotary speed that reduces front roller when with spinning speed, reference thickness partly being spinned.More specifically, in the method, the rotary speed of front roller and rear roller is all reduced provisionally, makes spinning speed be reduced from normal spinning speed, and does not change the thickness of yarn before card nailing neps forms.Then, begin to form card nailing neps.Therein in the state of speed lower than normal spinning speed, the speed of at least one in front roller and rear roller is changed to reduce draw ratio to form card nailing neps by the draw ratio when reference thickness is partly spinned.For example, by provisionally spinning speed being reduced to 1/3rd of normal spinning speed before card nailing neps forms, 1/9th the when rate of deceleration of desired roller and rate of acceleration can be lowered to normal spinning in the card nailing neps forming process.Therefore, when forming extremely short card nailing neps, the speed of front roller and rear roller can be changed smoothly and not use large energy force motor as variable speed motor.Therefore, do not need electromagnetic clutch or large can when forming the undercoat grain, front roller suddenly the acceleration and slow down by force motor.In addition, comprise that the special yarn of undercoat grain can be in the situation that do not reduce productivity and produced.
Read following description in conjunction with the following accompanying drawing that illustrates the principle of the invention with way of example, other aspects of the present invention and advantage will become and should be readily appreciated that.
Description of drawings
With reference to following to currently preferred embodiment description and accompanying drawing can understand best the present invention with and target and advantage, in the accompanying drawings:
Figure 1A shows the chart of the relation between the shape of the variation of velocity variations, draw ratio of each bottom roll in special yarn production method according to an embodiment of the invention and card nailing neps;
Figure 1B shows the chart of style data;
Fig. 2 shows the sketch of special yarn process units;
Fig. 3 shows the chart of the velocity variations of each bottom roll according to another embodiment of the present invention special yarn production method;
Fig. 4 shows the chart of the velocity variations of each bottom roll according to another embodiment of the present invention special yarn production method;
Fig. 5 shows the chart of the velocity variations of each bottom roll according to another embodiment of the present invention special yarn production method;
Fig. 6 shows the chart of the velocity variations of each bottom roll according to another embodiment of the present invention special yarn production method;
Fig. 7 shows the chart of variation of the rotary speed of spindle of the prior art, front roller and rear roller.
The specific embodiment
The method of production special yarn according to an embodiment of the invention is described now with reference to Fig. 1 and 2.
The special yarn process units has the structure identical with ring spinning frame basically.As shown in Figure 2, the special yarn process units has the spindle drive system, the drive pulley 3 that it comprises motor 2, driven by motor 2, driven pulley 4 and round two belt wheels 3 and 4 tangential belts 5 that extend.A plurality of spindles 1 of spindle drive systems.Motor 2 is the variable speed motor that driven by inverter 6.Motor 2 comprises rotary encoder 2a.Line shaft 7 is rotatably arranged along spindle row.A plurality of lift unit 10(only illustrate one) be arranged on line shaft 7 with predetermined interval.Each lift unit 10 promotes and reduces ring-shaped guide rail (ring rail) 8 and lappet angle (not shown).Ring-shaped guide rail 8 comprises ring 8a, and steel traveler T advances along ring 8a.The lappet angle comprises volute thread-carrier 9.
Each lift unit 10 comprises helical gear 11, and it is fixed to line shaft 7 and along with line shaft 7 integral-rotations, and nut 13, and it engages with helical gear 11.Nut 13 engages with the screw rod 12a of the bottom that is formed on elevating lever stand-off 12.Line shaft 7 is connected to the driving shaft of servo motor 14 by the gear mechanism (not shown).Thereby servo motor 14 produces along the rotation of previous and backward directions and promotes and reduction ring-shaped guide rail 8.Servo motor 14 comprises rotary encoder 14a and is controlled by servo-driver 15.
Front roller 17(only shows bottom roll) formed drawing-off part 16, front roller 17 is coupled to the first servo motor 18, and it is as variable speed motor.Middle roller 19(only shows bottom roll) be coupled to the second servo motor 20, it is as variable speed motor.After rear bottom roll 21(, top roller is not shown) be connected to middle roller 19 by gear train 22.In this embodiment, middle roller 19 and rear bottom roll 21 form rear roller.Also namely, front roller 17 and middle roller 19, perhaps rear roller each all driven by different variable speed motor.These two servo motors 18 and 20 comprise respectively rotary encoder 18a and 20a.Middle roller 19 comprises apron 19a.Gear 17a is fixed to front roller 17 and along with front roller 17 integral-rotations.Sensor s1 is disposed near the with the rotation output pulse signal according to front roller 17 of gear 17a.
Controller 23 is being controlled motor 2,14,18 and 20, and controller 23 comprises CPU (CPU) 24, program internal memory 25, work internal memory 26 and input equipment 27.CPU24 is connected to inverter 6 and servo-driver 15 by output interface and motor drive circuit (not shown).In addition, CPU24 is connected to the first servo motor 18 by output interface (not shown), motor drive circuit (not shown) and servo-driver 28.CPU24 also is connected to the second servo motor 20 by output interface, motor drive circuit and servo-driver 29.
CPU24 is by the preset program data manipulation that is stored in program internal memory 25.Program internal memory 25 is formed and program data and the needed various data of performing a programme data by read-only storage (ROM).
Routine data comprises for the program of controlling motor 2 and servo motor 14 at operating winding, is used for driving the control program of the first servo motor 18 and the second servo motor 20 and change the control program of the speed of the first servo motor 18 and the second servo motor 20 when forming card nailing neps at normal spinning process.Routine data comprises the data with spinning situation and velocity correlation.The spinning situation comprises spinning yarn number, draw ratio of fiber type, reference thickness etc.Speed is included in the rotary speed of rotary speed, the first servo motor 18 and the second servo motor 20 of the spindle during normal spinning and hoisting velocity and the decrease speed of ring-shaped guide rail 8.
Work internal memory 26 is readable and can writes internal memory, for example random-access memory (ram), and interim the storage by the data of input equipment 27 inputs and the result of calculation of CPU24.Work internal memory 26 comprises the back-up source (not shown).
Input equipment 27 is used to input spinning status data, such as the spinning yarn number of special yarn style data, reference thickness, when the yarn of reference thickness is spinned the spindle rotary speed, promote length, cop conical surface hypotenuse length etc.As shown in Figure 1B, the style data of special yarn comprise card nailing neps length L s, and it is the card nailing neps S(thick thread segment thicker than the reference thickness part Y0 of special yarn SY) length; And the pitch length P of card nailing neps S, it is the length of the reference thickness part Y0 between card nailing neps S.Style data indication timing changing speed forms to realize card nailing neps, and namely when beginning to underspeed before card nailing neps forms and when beginning card nailing neps forms.In addition, the style data are by the spinning Length Indication.Based on calculating spinning length from the output signal of sensor s1.
The control program of the first servo motor 18 and the second servo motor 20 does not change to the rotary speed single step ground of each in roller 17,19 and 21 speed that forms for card nailing neps from the speed that is used for normal spinning.Or rather, before changing to card nailing neps formation speed, control program changes to predetermined speed with rotary speed, and this predetermined speed keeps draw ratio constant lower than normal spinning speed simultaneously.Then, control program changes to card nailing neps with rotary speed and forms speed.Specifically, as shown in Fig. 1 a, in roller 17,19 and 21, the rotary speed of each is reduced to lower predetermined speed from normal spinning speed.Then front roller 17 is maintained at this lower speed, and middle roller 19 and rear bottom roll 21 each be accelerated to card nailing neps and form speed and remain on this card nailing neps formation speed and reach predetermined time length.Begin immediately when also namely, the card nailing neps rotary speed that is formed on front roller 17, middle roller 19 and rear bottom roll 21 reduce to finish.Afterwards, middle roller 19 and rear bottom roll 21 each be decelerated to identical with the speed of setting before card nailing neps formation speed than low velocity.In other words, the rotary speed of middle roller 19 and rear bottom roll 21 is set to card nailing neps and forms the last speed of setting before.After this, when keeping draw ratio constant, each in roller 17,19 and 21 is accelerated to normal spinning rotary speed, after this normally spins.
Present operation with tracing device.Before operating means, utilize input equipment 27 input spinning situations.The spinning situation of input comprises data, such as the spinning yarn number of special yarn style data, reference thickness, when the yarn of reference thickness is spinned the spindle rotary speed, promote length, cop conical surface hypotenuse length etc.
When device was activated, controller 23 sent the order of CD-ROM drive motor 2, servo motor 14, the first servo motor 18 and the second servo motor 20.CPU24 calculates the rotary speed of corresponding motor with the output signal of rotary encoder 2a, 14a, 18a and 20a.CPU24 synchronously drives spindle drive system, drawing-off section's drive system and promotes drive system with the predetermined speed corresponding with the spinning situation to inverter 6 and servo- driver 15,28 and 29 transmission command signals by output interface and each drive circuit.Spindle drive system, drawing-off section's drive system and lifting drive system are synchronously driven with state independent of each other.The special yarn SY that presents from drawing-off part 16 passes through volute thread-carrier 9 and steel traveler T and is reeled round peg or spindle B.
When the reference thickness yarn is spinned, the CPU24 rotary speed of calculating front roller 17 from the output signal of sensor s1, also, spinning yarn length.When card nailing neps S was spinned, CPU24 but did not change yarn thickness with in front roller 17, middle roller 19 and rear bottom roll 21, each decelerates to predeterminedly than low velocity from the rotary speed that is used for normal spinning,, keeps simultaneously draw ratio constant yet.Then, for card nailing neps forms, front roller 17 is maintained at predetermined than low velocity.Each is accelerated to middle roller 19 and rear bottom roll 21 card nailing neps and forms maximal rate and maintain this card nailing neps and produce maximal rate and reach the scheduled time.Then, middle roller 19 and rear bottom roll 21 are decelerated to predetermined low rotary speed.After this, roller 17,19 and 21 each be accelerated to normal spinning rotary speed and keep simultaneously draw ratio constant.Then, carry out normally spinning.Then, carry out in an identical manner the special yarn spinning.
As a result of, as shown in Figure 1A, special yarn SY rotary speed of each from middle roller 19 and rear bottom roll 21 begins to become thicker than reference thickness when the predetermined speed lower than normal spinning speed increases.Special yarn SY rotary speed of each in middle roller 19 and rear bottom roll 21 reaches when card nailing neps forms maximal rate and becomes the thickest.Part with maximum ga(u)ge is that the rotary speed at middle roller 19 and rear bottom roll 21 is maintained in the time period that card nailing neps produces maximal rate and forms.Then, the rotary speed of each is lowered to and has formed in the time period than low velocity of setting when card nailing neps forms beginning from the maximum ga(u)ge part of attenuation gradually in middle roller 19 and rear bottom roll 21.Card nailing neps length L s refers to the length of the part with thickness different from reference thickness.
From roller 17,19 and 21 each absolute value that decelerates to the deceleration gradient of predetermined during than low velocity (Figure 1A from time t1 to time t2) from normal spinning rotary speed be set to from roller 17,19 and 21 each form when accelerating to normal spinning rotary speed after finishing the absolute value of accelerating gradient of (in Figure 1A from time t3 to time t4) at card nailing neps identical.The not obvious reduction productivity in order to form the undercoat grain, the time of be used for slowing down is needed as 0.3 second or still less, and the deceleration gradient during card nailing neps forms is set to the value corresponding to normal spinning speed and the target velocity after finishing of slowing down.And accelerating gradient and the deceleration gradient of rear roller (middle roller 19 and rear bottom roll 21) are set to have identical absolute value during card nailing neps forms.Card nailing neps formation time length (from time t2 to time t3) was set to 0.4 second or still less, and rotary speed and the card nailing neps of the accelerating gradient during card nailing neps forms when being set to form beginning with card nailing neps forms value corresponding to maximal rate.Time when by this way, the preparatory stage before forming (decelerate to card nailing neps from normal spinning speed and form commencing speed) turns back to original spinning speed to card nailing neps formation and speed from card nailing neps is one second or still less.
CPU24 card nailing neps form timing near the time come to calculate according to the spinning situation time point (the time t1 in Fig. 1) that reduces spinning speed with spinning yarn length.Card nailing neps forms that starting point is calculated so that the pitch length P of the card nailing neps S in special yarn SY is identical with pitch P in the style data, and makes spinning speed slow down to complete and defined card nailing neps formation starting point.
In the prior art, when reference thickness was partly spinned, the spinning speed of front roller 17 was slowed down suddenly or is accelerated to form card nailing neps.The present embodiment difference with the prior art is, forms front draft than not changing and card nailing neps formation begins when the rotary speed of each is reduced to reduce spinning speed from front roller 17 and rear roller (middle roller 19 and rear bottom roll 21) at card nailing neps.By this way, in front roller 17 and rear roller at least one rotary speed by from (for example, state 15-30m/min) changes, and after this, draw ratio is reduced from the draw ratio that reference thickness part Y0 is spinned lower than normal spinning speed.
The rate of acceleration of the rotary speed of needed roller and spinning speed is square proportional when formation has the card nailing neps of full-length (30mm or larger card nailing neps length).In addition, compare during with formation standard card nailing neps, the roller rate of acceleration when forming undercoat grain (less than the card nailing neps length of 30mm) is needed as obviously larger (approximately 3-10 doubly).But, for example, by before card nailing neps forms, spinning speed being reduced to 1/3rd of normal spinning speed provisionally, desired roller rate of acceleration and rate of acceleration can be reduced to normal spinning desired 1/9th during card nailing neps forms.Therefore, when forming extremely short card nailing neps, the speed of front roller 17 and rear roller can be changed smoothly, and does not use the motor with large ability as variable speed motor.
The present embodiment has advantage as described below.
(1) special yarn SY comprises the part that is called as card nailing neps, card nailing neps is thicker than the part with reference thickness, this special yarn SY utilizes spinning frame production, this spinning frame comprises drawing-off part 16, in this drawing-off part 16, front roller 17 and rear roller (middle roller 19 and rear bottom roll 21) are driven by different variable speed motor.In addition, do not change yarn thickness before card nailing neps forms, the rotary speed of front roller 17 and rear roller (middle roller 19 and rear bottom roll 21) is reduced provisionally.By after normal spinning speed reduces, the beginning card nailing neps forms at spinning speed.Therefore, the motor that the formation of undercoat grain does not require electromagnetic clutch or has a large ability reduces suddenly or increases the rotary speed of front roller 17, and comprise the undercoat grain special yarn can in the situation that not obvious reduction productivity produced.
(2) during card nailing neps formed, the rotary speed of rear roller (middle roller 19 and rear bottom roll 21) was increased to reduce draw ratio.By this way, during card nailing neps formed, rear roller was accelerated and do not change the speed of front roller 17.Therefore, compare when only accelerating front roller 17, reduced the driving load on front roller 17, and improved productivity.
(3) with the spinning situation, the deceleration gradient that card nailing neps forms the rotary speed of front front roller 17 and rear roller is set accordingly.Deceleration gradient can be fix and no matter the spinning situation how.But, preferably, the time that is used for deceleration is short.By with the spinning situation, deceleration gradient being set accordingly, the deceleration gradient that shortens the deceleration required time can be set, making does not have excessive power to be applied in drawing-off part 16.
What those skilled in the art should understand is that in the situation that do not break away from the spirit or scope of the present invention, the present invention can be implemented by many other concrete forms.Especially, should be understood that, the present invention can implement with following form.
As shown in Figure 3, during card nailing neps formed, the rotary speed of front roller 17 can be lowered to reduce draw ratio.In this case, during card nailing neps forms, can only reduce draw ratio by the rotary speed that reduces front roller 17.
Therefore, need not to carry out control to the speed that changes rear roller.Therefore, the rotary speed that be used for to drive the second servo motor 20 of rear roller needn't be higher than the rotary speed that is used for normal spinning, and can use the motor with low maximal rate.
As shown in Figure 4, during card nailing neps forms, except accelerating rear roller, also can slow down to front roller 17.Compare when in this case, the variable quantity of the speed of front roller 17 and rear roller can or only be reduced to desired value by the speed that changes rear roller with draw ratio with the speed by changing front roller 17 only and be reduced.
Can adopt any in following three kinds of programs according to the spinning situation to the special yarn that illustrates or will be produced of spinning frame.
(1) for card nailing neps forms, increase and reduce the rotary speed of front roller 17.
(2) for card nailing neps forms, increase and reduce the rotary speed of rear roller.
(3) for card nailing neps forms, the rotary speed that increases and reduce front roller 17 also increases and reduces the rotary speed of rear roller simultaneously.
In carrying out the program of card nailing neps formation by the rotary speed that increases and reduce front roller 17, the load that is applied to front roller 17 increases.Therefore, preferably this program is used when the front roller drive system has enough power.In carrying out the program of card nailing neps formation by the rotary speed that increases and reduce rear roller, the load that is applied to front roller 17 increases.Therefore, preferably this program is used when the rear roller drive system has enough power.In the rotary speed that also increases simultaneously and reduces rear roller by the rotary speed that increases and reduce front roller 17 was carried out the program of card nailing neps formation, the load that is applied to front roller 17 and rear roller was in above two programs between applied load.Therefore, preferably this program is not used when front roller drive system and rear roller drive system do not have enough power.
During card nailing neps formed, front roller 17 was slowed down or rear roller is accelerated that draw ratio is reduced from the draw ratio that the part with reference thickness is spinned.When front roller 17 and rear roller reached their target velocity, target velocity needn't be maintained.As shown in Fig. 5 and 6, front roller 17 and rear roller can be controlled to make slow down and accelerate and be begun immediately.
When reducing the rotary speed of front roller 17 during card nailing neps forms, speed can be lowered to zero.Also namely, front roller 17 can be stopped provisionally.
Replace driving middle roller 19 and rear bottom roll 21 with the second identical servo motor 2, middle roller 19 and rear bottom roll 21 can be driven by different variable speed motor.
Can arrange to each deceleration gradient absolute value when normal spinning rotary speed decelerates to predetermined low speed in roller 17,19 and 21 be different from card nailing neps form complete after to roller 17,19 and 21 absolute value of each accelerating gradient when accelerating.
To in roller 17,19 and 21 each when normal spinning rotary speed decelerates to predetermined low speed deceleration gradient and form during each accelerating gradient when accelerating can be stored in program internal memory 25 or work internal memory 26 accordingly in advance with the spinning situation to roller 17,19 and 21 after completing at card nailing neps.
Card nailing neps forms in the time of needn't finishing in the deceleration of front roller or rear roller, and can slightly postpone when this deceleration finishes.But, preferably be different from the spinning state of normal spinning short.Therefore, preferably beginning immediately card nailing neps when slowing down end forms.
Spinning speed when replacing no matter when inputting the spinning situation and all will input card nailing neps and form beginning, from the rate of deceleration of normal spinning speed can be in advance and the thickness of card nailing neps S and length be stored in accordingly program internal memory 25.Spinning speed when in this case, CPU24 can automatically arrange the formation of beginning card nailing neps according to the spinning situation.
This example and embodiment are considered to illustrative and nonrestrictive, and the present invention is not restricted to the details that this paper provides, but are changed in the scope of claims and equivalent way.

Claims (9)

1. method of producing special yarn with spinning frame, described special yarn comprises the card nailing neps that is formed by the part thicker than the part with reference thickness, described spinning frame comprises the drawing-off part, front roller and rear roller by different variable speed motor rotations, said method comprising the steps of in the drawing-off part:
Rotary speed with front roller and rear roller reduces spinning speed to be reduced to the speed lower than normal spinning speed provisionally, but does not change the thickness of yarn before card nailing neps forms; With
The state that is reduced to less than the speed of normal spinning speed from spinning speed is wherein carried out card nailing neps and is formed.
2. the method for claim 1, is characterized in that, the step that described execution card nailing neps forms comprises the step that reduces draw ratio by at least one rotary speed in change front roller and rear roller.
3. method as claimed in claim 2, is characterized in that, the step of described reduction draw ratio comprises the rotary speed that reduces front roller and the rotary speed of rear roller is maintained constant speed.
4. method as claimed in claim 2, is characterized in that, the step of described reduction draw ratio comprises the rotary speed of keeping front roller in constant speed and increases the rotary speed of rear roller.
5. method as claimed in claim 2, is characterized in that, the step of described reduction draw ratio comprises the rotary speed that reduces front roller and the rotary speed that increases rear roller.
6. method as claimed in claim 1 or 2, is characterized in that, the described step that reduces provisionally the rotary speed of front roller and rear roller comprises with the spinning situation deceleration gradient is set accordingly.
7. method as claimed in claim 1 or 2, is characterized in that, the step that described execution card nailing neps forms is included in the rotary speed of front roller and rear roller is slowed down and begins immediately card nailing neps formation when finishing.
8. method as claimed in claim 1 or 2, also being included in increases the rotary speed of front roller and rear roller to the step of the rotary speed of normal spinning after carrying out the step that card nailing neps forms.
9. method as claimed in claim 8, it is characterized in that, the accelerating gradient of the rotary speed in the front roller in reducing provisionally the rotary speed step and rear roller in the deceleration gradient of the rotary speed of each and increase rotary speed step has identical absolute value.
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JPS60139831A (en) * 1983-12-26 1985-07-24 Howa Mach Ltd Manufacture of particular yarn
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CN1702206A (en) * 2004-05-24 2005-11-30 株式会社丰田自动织机 Method and apparatus for manufacturing special yarn
CN1782150A (en) * 2004-11-30 2006-06-07 株式会社丰田自动织机 Device for producing special yarn
CN102154744A (en) * 2011-05-13 2011-08-17 海宁苏拉纱线有限公司 Multifunctional improved spinning frame

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