JPS6011126B2 - How to stop the drawn yarn machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for stopping a synthetic fiber draw-twisting machine, and an object of the present invention is to prevent yarn breakage from occurring when the draw-twisting machine is started.

Conventionally, it has been widely adopted to perform shrinkage heat treatment following the drawing of synthetic fibers to improve the dimensional stability of the yarn.

In such a device, when the winding bobbin is fully wound,
Generally, continuous doffing is performed, but the drawing heat treatment roller is stopped while the yarn is still caught on the roller. For this reason, the yarns staying in the heating zone are exposed to high heat treatment temperatures throughout the stoppage, and when the crystallization and heat-setting effects progress or deteriorate and the draw-twisting machine is restarted, the yarns Since the yarn cannot be contracted by a predetermined amount between the rollers, it becomes sagging, and the yarn often winds around the loaf and breaks. In particular, when obtaining a low-shrinkage yarn, the heat treatment temperature is high; for example, in the case of polyester yarn, the temperature is maintained at a temperature of 180 to 240q0, so the above-mentioned tendency is strong. The present invention has been made in view of this problem, and when stopping the drawing/twisting machine in which the drawing/heat-treating roller system and the 1''-ng twisting system are made up of separate drive systems, the drawing/heat-treating loaf is stopped at the same time as or immediately after the full signal. After interrupting the heating or lowering the temperature, and then cutting off the driving of the drawing heat treatment roller system and the twisting yarn system, a top punch is formed at the upper end of the bobbin, and before and after that, both of the driving systems are switched to low speed driving, and then The ring is moved to the lowest end and waist-wound is performed, and the low-speed operation of both drive systems is stopped after the temperature of the stretching heat treatment roller has dropped to a constant temperature.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 shows a schematic diagram of a draw-twisting machine implementing the invention.
In the figure, 1' is an unstretched package, 2 is a yarn feeding roller, 3 is a preheating roller, 4 is a heated stretching roller, 5 is a stretching heat treatment roller, and 6 is a cooling roller. They are formed and have the same driving source, and rotate at a predetermined speed from an output shaft 9 of a main drive motor 8 via a gear train 10 (separate rollers are normally provided for each of the rollers 3 to 6). Reference numeral 11 denotes a pulley fixed to the output shaft 9 of the main drive motor 8, and a belt 13 is stretched between the pulley and the clutch 12, and a worm wheel 14 is provided on the input shaft of the clutch 12.
A worm 6 that meshes with the worm 6 is connected to a low-speed drive motor 17 via a shaft 16.

Next, the drive motor 19 of the spindle (lacquer thread machine) 18 is a DC motor provided separately from the main drive motor 8, and by changing its field voltage, it can be changed from high speed to low speed, for example 10
000-200 ratio. p. m speed changes are performed.

201 is a chimp pulley provided on the drive shaft 21 of the spindle 18; 22 is a drive belt of the spindle 18 that connects the spindle 1;
The tension pulley 23 and the pulley 23 are engaged with the drive section 8 and are caused to travel from the two sides.

24 is the waist spool installed at the bottom of the spindle, 25
is a ring rail to which a ring holder 28 for holding a ring 27 into which a traveler 26 is inserted is attached.

A traverse belt 29 is locked to the ring rail 25, and a hydraulic cylinder 31 reciprocates in the direction of arrow B via a traverse rod 30 connected to the traverse belt 29.
traverse in the direction of arrow A in the figure. 32 is a rabbet guide.

Next, implementation of the method of the present invention using such an apparatus will be explained.

The scaled yarn Y from the wire drawing package 1 is passed from the yarn feeding roller 2 to the preheating roller 3, where it is heated and wound around the next drawing roller 4, during which the first drawing is performed. Furthermore, a second stage of stretching is performed between this roller 4 and the next stretching heat treatment roller 5. The drawing heat treatment roller 5 has a high temperature (usually 200 oo or higher), and the thread wound thereon is heat set and shrinks by a predetermined ratio between it and the next cooling roller 6.
Next, the yarn Y passes through the rabbet guide 32 and the traveler 26 which is iron-bonded to the ring 27, and is wound onto a bobbin inserted into the spindle 18 to form a burn 33.

During this stretching and winding, the stretching heat treatment roller system 7 is rotated by the main drive motor 8, the spindle 18 is driven by the high speed drive of the motor 19, and the ring 27, that is, the ring rail 25 is driven by the hydraulic cylinder 31 driven by the main pump (not shown). traverse is performed. Incidentally, at this time, the clutch 12 is disengaged so that the rotation of the drive shaft 9 is not transmitted to the low-speed motor 17. When a full wind burn 33 is formed on the bobbin, the auto counter issues a full wind signal, and this signal switches the set temperature of the temperature regulator of the drawing heat treatment roller 5 from a high temperature to a low temperature (for example, from 210° to 150°). Heating of the roller 5 is interrupted and the temperature begins to drop.

In this case, a cooling liquid may be actively introduced at the time of the roller to forcibly lower the temperature to a constant temperature. The operation from this dripping signal to the stop of the drive system of the apparatus will be explained below using the timing diagram shown in FIG. In the figure, when a predetermined amount of yarn is wound up, the auto counter issues a full winding signal (time a) as described above, and at the same time, this signal switches the set temperature T of the drawing heat treatment roller 5 to the set temperature T2 on the low temperature side. heating is interrupted. Further, when the ring 27 reaches the upper end of the traverse after the full wind signal and a detection means such as a phototube detects this (time b), the spindle drive motor 9 is switched off, and the spindle 18 rotates by inertia (for the first time period, which will be described later). (A braking device is activated to match the stoppage of the main drive motor 8.) At the same time, a timer is activated, and after a certain period of time, the ring 27 is stopped and a punch winding is formed in the center of the burn indicating the division from the normal yarn. At time c, the ring 27 moves to the punch winding upper position and starts a minute traverse. Further, after the spindle drive motor 19 is turned off, at time d, the main drive motor 8 of the stretching heat treatment roller system is turned off and inertia operation begins.
Next, at time e, the handling ring 27 moves to the uppermost end and stops, and begins to form a top punch at the upper end of the bobbin to prevent competing rice cakes. At the same time, the spindle drive motor 19 switches to low-speed drive, and then the main drive motor 8 Stop completely. Thereafter, after a predetermined period of time has elapsed, at time f, the clutch is engaged and the low speed motor 17 is driven, and the stretching heat treatment roller system 7 starts rotating at a low speed. At the same time, the ring 27 suddenly descends, starts a minute traverse at the lowest waist sbourg position, and starts wrapping around the waist (time g
), the temperature of the stretching heat treatment roller 5 is low T2, for example 150
℃, and when it drops to the set temperature L of 15000 (it may be linked to the set temperature T2 or the time may be determined in advance with a timer).
, the spindle drive motor is turned off (time h), the roller enters inertia operation, and the temperature regulator starts operating so that the stretching heat treatment roller 5 is maintained at the above-mentioned overflow level. Next, at time i, the low-speed motor 17 is turned off and at the same time the ring 2 starts to rotate by inertia.
7 also stops. After this, the low-speed motor 17 completely stops (
At time j) and further at time k, the spindle drive motor 19 also stops, and the drawing/twisting machine completely stops. Here, the heat source of the drawing heat treatment roller 5 is controlled in conjunction with the full winding signal, and the high temperature setting temperature T during normal operation is switched to the low temperature setting temperature T2, and the yarn is heated by the drawing combustion machine during this descent. Necessary operations are performed when stopped, and at the final stage, winding is performed at low speed. Therefore, while the drawing/twisting machine is completely stopped, the temperature of the drawing heat treatment roller 5 drops to a predetermined temperature, and even if the yarn is in contact with the roller until the next operation starts, there is almost no progress or deterioration of the heat setting effect, and operation is resumed. Occasionally, thread breakage does not occur frequently. In the above description, the low-speed operation is performed after the drive of the drawing heat treatment roller system is temporarily stopped, but the low-speed operation may be performed during the inertial rotation of the main drive motor. Furthermore, although various operations were performed before operating the spindle and the drawing heat treatment roller system at low speed, the present invention is not limited to these operations, and any operations may be performed as appropriate.
Furthermore, the temperature of the heating rollers outside the stretching heat treatment roller may be lowered in the same way, and the set temperature (both high and low temperature) of the stretching heat treatment roller etc. can be changed as appropriate depending on the conditions, and is not limited to a specific temperature. It's not something you can do. Example Using a device similar to that shown in FIG. 1, the temperature of the stretching heat treatment roller was set at
Stage 3.0, second stage 1.3, spindle rotation speed 1000 p. Wind the undrawn yarn of polyethylene alephthalate at m, and at the same time as the full wind signal, interrupt the heating of the drawing heat treatment roller, cut off the drive of the drawing heat treatment roller system and spindle, perform the same operation as shown in Fig. 2, and then operate at low speed. (Stretching heat treatment roller
ow'min, spindle 150 units. p. When the temperature of the stretching heat treatment roller reached y° C., layering was completely stopped.

After this, operations such as a hot water bath were performed, and operation was resumed after z minutes (low speed operation at first, then normal operation). On the other hand, the operation was restarted using the same apparatus as shown in FIG. 1 without lowering the temperature of the stretched heat-treated loaf and performing other operations in the same manner as in the example (subsequent example). In this case, the yarn breakage rates at the time of restarting (starting up) both the yarns were as follows.

As explained above, according to the present invention, there is a remarkable effect that there is almost no thread breakage at the time of startup, and restart of operation can be carried out extremely smoothly.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of an apparatus for implementing the present invention, and FIG. 2 is a timing diagram of the apparatus shown in FIG. 4...Heating stretching roller, 5...Stretching heat treatment roller, 7...Stretching heat treatment roller system, 8...
... Main drive motor, 17 ... Low speed drive motor, 18 ... Spindle, 19 ... Spindle drive motor, 27 ... Ring. spear 1 size 2 figures

Claims (1)

[Claims] 1. When stopping the drawing/twisting machine, which consists of separate drive systems for the drawing heat treatment roller system and the ring twisting system, the heating of the drawing heat treatment rollers is interrupted or the temperature is lowered at the same time as or immediately after the full winding signal, and then the drawing heat treatment rollers are stopped. After cutting off the drives of the ring twisting system and the ring twisting system, a top bunch is formed at the upper end of the bobbin, and both drive systems are switched to low speed operation between before and after, and then the ring is moved to the lowest end and waist winding is performed, and the drawing heat treatment roller A method for stopping a draw-twisting machine characterized by stopping low-speed operation of both drives when the temperature drops to a certain temperature.