CN1328430C - Method for preventing re-twisting-in for automatic winding frame - Google Patents

Abstract

The present invention relates to a method for preventing yarn from being possibly spliced once again after the yarn is successfully spliced by an automatic bobbin winder in the production of textile industry. The present invention comprises the measures that an upper limit stop in the shape of an end cam is fixedly installed below an electronic yarn clearer and on the highest position of a small suction nozzle and is adpressed with the small suction nozzle, and the upper limit stop is fixed on an electric clearing bracket by a screw; meanwhile, a program is set for a single-spindle controller for controlling the rotary speed of a grooved drum motor, and starting time that the grooved drum motor is started earlier than a recovery process of the small suction nozzle is set; a plurality of steps of starting acceleration are cooperated with the small suction nozzle to be set when different yarn is processed, at this point, the speed of a grooved drum is larger than a set initial coiling speed in order to tension loose yarn in the recovery process of the small suction nozzle, the loose yarn is prevented from sucking out of an electric clearing and measuring head by negative pressure to cause a false image of unsuccessfully splicing, and splicing once again is avoided. The present invention has the advantages of simple improved mechanisms and accurate control, and the yarn which is successfully spliced can be effectively prevented from being spliced once again.

Description

Automatic winder prevents the method for splicing again after the Yarn splicing success

Technical field

The present invention relates to field of textile machinery, be meant that specifically automatic winder prevents the method that may splice again after the Yarn splicing success.

Background technology

In the automatic winder operation process, when groove drum revolution doff, find to contain the yarn defect in the yarn as the electronic yarn clearer gage outfit, cut off with being about to yarn, excision yarn defect enters splicer by big suction nozzle near the upper end that holds broken yarn the bobbin then, the lower end that little suction nozzle holds broken yarn enters splicer, splice through air-flow, broken yarn is spliced into yarn, little suction nozzle returns original position.In little suction nozzle return course, the splice yarn that is compressed by hello people's arm begins to relax, since the effect of negative pressure, the good lax yarn sucking-off electronic yarn clearer gage outfit of will splicing easily, at this moment the no yarn signal of electronic yarn clearer gage outfit output, expression is spliced failure and is spliced once more.At present, prevent in this field that the method for splicing again after the Yarn splicing success from roughly having two kinds: a kind of is to adorn air damper controller in little suction pipe, and controller cuts out air door when little suction nozzle returns, and eliminates negative pressure; Another kind method is to change the approach that little suction nozzle returns, and makes little suction nozzle close air door in return course, eliminates negative pressure, prevents the purpose of splicing again thereby reach.But the shortcoming of these two kinds of methods is complex structures, the cost height.

Summary of the invention

The objective of the invention is to make improvements, a kind of convenient and reliable method of splicing again after the Yarn splicing success of preventing is provided at above-mentioned prior art.

For achieving the above object, taked following measure:

(1) below electronic yarn clearer, the highest position of little suction nozzle, fixedly mount a last block that is the edge cam shape of being close to little suction nozzle, last block is screwed on the electronic yarn clearer support; When splicing, yarn enters in the process of splicer little suction nozzle holding down, moves to the extreme higher position from original position, and its air door is opened from being closed under the effect of last block cross section curve simultaneously.Splice finish after, little suction nozzle is returned to original position along last block cross section curve from the extreme higher position under the effect of its gear, in the Recovery Process, air door is finished the action of closing from being opened to again, and at this moment the splice yarn that is compressed by the feeding arm begins to relax, and forms certain slack.

(2) the single ingot controller to control groove drum motor speed carries out the program setting, sets the starting time of the startup of groove drum motor early than above-mentioned little suction nozzle Recovery Process; And cooperate the Recovery Process of little suction nozzle along last block cross section curve, groove drum motor when setting the processing different yarns starts acceleration for some grades, make at this moment groove drum speed greater than the initial winding speed of setting, with the lax yarn of rolling-in, groove drum is returned to permanent speed when little suction nozzle is returned to original position.

Advantage of the present invention is that mechanism improves simply, precise control, and the yarn that can prevent from effectively to splice after finishing is spliced once more.

Description of drawings

Fig. 1 is an automatic winder list ingot structure side view of the present invention; Accompanying drawing 2 is little suction nozzle upper-lower position schematic diagram; Accompanying drawing 3 is little suction nozzle operating position figure; Accompanying drawing 4 is a groove drum motor start-up speed curve diagram; Accompanying drawing 5 is last block side view; Accompanying drawing 6 is last block front view.

Among the figure:

1. groove drum; 2. big suction nozzle; 3. little suction nozzle; 4. electronic yarn clearer gage outfit; 5. little suction nozzle air door; 6. bobbin; 7. splicer; 8. yarn; 9. go up block; 10. feed people's arm; 11. electronic yarn clearer support.

The position A of little suction nozzle shown in the accompanying drawing 3 ₁～A ₆Shown in corresponding little suction nozzle cam angle θ, angle α and Yarn relaxation amount Δ L (mm) see the following form.

Little suction nozzle position	θ	α	ΔL，mm
				A 1A 2A 3A 4A 5A 6	315° 317° 319° 321° 323° 325°	0° 0.441° 3.342° 5.812° 12.186° 20.768°	0 1.40 9.1 7.2 16.8 16.4

The specific embodiment

After finishing when splicing, little suction nozzle 3 under the effect of its gear from extreme higher position A ₁Through A ₂, A ₃, A ₄, A ₅, A ₆After be returned to the original position (see figure 3), the medium and small suction nozzle air door 5 of Recovery Process moves along last block 9 cross section curves and is opened to closing motion.May siphon away yarn for solving when air door is opened, allow in little suction nozzle 3 Recovery Process 1 ° of revolution cause lax and yarn Δ L that increase is swept away by groove drum.At this moment, calculate the lax length of yarn Δ L of 2 ° of generations of little suction nozzle cam revolution earlier ₁, Δ L ₂, Δ L ₃, get maximum then, i.e. Max (Δ L ₁, Δ L ₂, Δ L ₃), in addition little suction nozzle 3 revolutions need the 20ms time for 1 °, can be calculated the rotating speed of this time groove drum motor by following formula

$n=\frac{\mathrm{\Δ}{L}_{\max }\×60}{2\mathrm{\πd}\×40\×{10}^{-3}},(r/\min )$

In the formula: d is the groove drum diameter; 4 * 10 ^-3Be the time of 2 ° of little suction nozzle revolutions.When selecting groove drum electromotor velocity n ₁When being slightly larger than n, just can guarantee that the Δ L that any moment produces in little suction nozzle turning course is taken away by groove drum; But n ₁Can not be much larger than n, in order to avoid yarn is broken.

In addition, consider the winder of different yarns, groove drum motor start-up speed is divided into high speed 3m/s ², middling speed 2m/s ², low speed 1m/s ²The third gear (see figure 4).3m/s ²Be suitable for powerful higher chemical fibre and blended yarn thereof; 2m/s ²Be suitable for 80 following cotton yarns; 1m/s ²Be suitable for the cotton yarn more than 80.

Be that the example narration prevents to splice process again below with the middling speed: the feeding arm is opened after Yarn splicing is finished, and the yarn that former cause hello people's arm compresses begins to relax, and slack is Δ L ₁, the groove drum middling speed starts, and reaches n at rotating speed ₂, at T ₁(θ ₁) constantly, groove drum is failed the length Δ L of Yarn relaxation ₁Sweep away fully, this moment, little suction nozzle was not moving, when the groove drum rotating speed reaches n ₁The time, i.e. T ₂(θ ₂) constantly little suction nozzle setting in motion, the feeding arm is opened the Yarn relaxation amount that causes and is swept away fully, has guaranteed that yarn remains tensioning state, and is not inhaled the people by little suction nozzle and be with from electronic yarn clearer gage outfit (B place), causes and splices.Little suction nozzle begins from A ₁The position is to A ₂, A ₃A ₆In the return course, cause the Yarn relaxation amount to be respectively Δ L ₂, Δ L ₃, Δ L ₆, because the rotating speed of groove drum is also being accelerated gradually, the yarn that enough will relax sweeps away, until yarn normal winding after B point and C point are linked to be straight line, little suction nozzle has also been got back to original position.

Claims (1)

1. automatic winder prevents from the method for splicing again after the Yarn splicing success to it is characterized in that:

Below electronic yarn clearer, the highest position of little suction nozzle, fixedly mount a last block that is the edge cam shape of being close to little suction nozzle, the described block of going up is screwed on the electronic yarn clearer support; Little suction nozzle moves to the extreme higher position from original position when splicing, and little suction nozzle air door is opened from being closed under the effect of last block cross section curve simultaneously; Splice finish after, little suction nozzle is returned to original position along last block cross section curve from the extreme higher position again, in the Recovery Process, air door is finished the action of closing from being opened to again;

Single ingot controller to control groove drum motor speed carries out the program setting, and the startup of setting groove drum motor is early than the start-up time of above-mentioned little suction nozzle Recovery Process; And cooperate the Recovery Process of little suction nozzle along last block cross section curve, groove drum motor when setting the processing different yarns starts acceleration for some grades, make at this moment groove drum speed greater than the initial winding speed of setting, with the lax yarn of rolling-in, groove drum is returned to permanent speed when little suction nozzle is returned to original position.

Images