JP2957349B2 - Method and apparatus for detecting oil adhering to yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention accurately monitors an oil applied to a running yarn by detecting the applied state of the oil when the oil is applied in a process such as spinning, drawing or rewinding of a synthetic fiber. Method and apparatus.

[0002]

2. Description of the Related Art Generally, an oil agent is applied to a yarn comprising a synthetic fiber multifilament from the viewpoint of stabilization of process, antistatic property, quality and the like. In recent years, with the drastic increase in the running speed of the yarn during yarn production, spotting due to friction trouble between the yarn and the yarn guides, the problem of fuzz generation, the winding of a single yarn on a rotating body, and the like are likely to occur. Has become.

[0003] In order to prevent such troubles, it is strongly desired to uniformly apply an oil agent. Therefore,
A guide lubrication system has been used for high-speed spinning in place of a roller lubrication system in order to provide a uniform amount of the oil agent.

However, in this case, various methods for managing the oil supply state, which is an important management item, have been conventionally studied. However, since the management of each weight is performed independently, the number of the weights becomes extremely large, and the accuracy is still high. It is considered a very difficult technology because there is no thing.

[0005] Conventionally, the method of controlling the applied amount of the oil agent is to measure the amount of the applied oil agent in a batch manner by the gravimetric method, determine the application condition of the oil agent based on the result, and to determine the conditions until the next measurement result is obtained. A method was used to keep the conditions constant. Therefore, when an unexpected change occurs in the applied amount of the oil agent, there is a problem that it cannot be easily dealt with. Here, the gravimetric method is the most basic method of obtaining the state of oil agent adhesion by the difference between the weight of the oil agent attached to the skeined yarn collected and the weight of the oil agent removed by washing the skein sample. This is a very time-consuming method.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem of the conventional oil supply control, and accurately detects oil agent adhesion spots on a running yarn in a spinning process or the like. In addition, it is an object of the present invention to provide a method and apparatus capable of centrally controlling the state of application of an oil agent in response to the optimization of the shape of the oil agent application nozzle and the recent increase in the number of spindles.

[0007]

That is, the present invention relates to a method for online monitoring of an oil agent applied to a running yarn. A method for detecting an attached oil agent on a traveling yarn, characterized by detecting an oil application state of the yarn in response to the traveling yarn, and a traveling yarn substantially immediately after leaving the oil application device.
A yarn adhering oil detecting device, wherein a tension meter is connected to a spindle of a yarn focusing guide to be bundled, and an alarm device is provided to the tension meter in conjunction with the tension meter.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is an explanatory view of a process showing an embodiment of the present invention, FIG. 2 is an explanatory view of another embodiment, and FIG. 3 shows a correlation between a yarn tension and an amount of applied oil for explaining an embodiment of the present invention. FIG.

In FIG. 1, a yarn y discharged from a spinning pack is cooled and solidified in a spinning cylinder 1 and an oil agent is applied by a guide oiling device 2 (also referred to as a measuring oiling, a measuring nozzle, a measuring head system, etc.). The yarn enters the yarn collecting guide 3 disposed slightly behind the guide lubricating device 2 so as to be appropriately tensioned, passes through the yarn collecting guide 3 at a slight inclination, and is wound up by a godet roller (not shown) or the like.

As the yarn focusing guide 3, a hook shape, a ring shape, a snell shape or the like is used, but any material can be used as long as the running property of the yarn is stable and there is no large fluctuation in the tension measurement. it can. The thread collecting guide 3 has a support shaft 3
A tension meter 4 is connected to the rear end of the shaft 3a. The tension in the axial direction of the support shaft 3a is electrically converted and taken out, and a recorder is connected via an amplifier 5 (or a dynamic strain meter) connected to the tension meter 4. 6 so that the tension state can be constantly and continuously monitored.

Here, if the yarn y to which the oil agent is applied by the guide oil supply device 2 has uneven spots or fluctuations of the oil agent, the yarn y running in contact with the yarn collecting guide 3 correspondingly responds to this. The frictional force between the guides 3 changes, and the state of the change is continuously recorded. In this case, there is a correlation that when the amount of the oil agent attached is small, the frictional force increases, and the tension also increases correspondingly, and conversely, when the amount increases, the tension decreases. Therefore, if the allowable limit width of the tension variation is determined to be an appropriate value depending on the conditions to be used, if the set allowable limit width is exceeded, it may be processed as an occurrence of an abnormality.

As a processing method, an allowable limit width is set in the recorder, and when the measured value exceeds the limit value, the alarm device is connected so that the alarm device is activated, or a separate controller is provided. An alarm or display may be performed, or the thread may be cut at the same time as the occurrence of an abnormality in conjunction with the thread cutter.

FIG. 2 is a schematic view showing a system for monitoring the state of adhesion of the oil agent in a multi-spindle state. A thread collecting guide 3 connected to a tensiometer 4 is provided corresponding to the number of weights. Each is connected to a recorder 6 and a controller 7 via an amplifier 5, and the controller 7 is connected to an alarm 8 so that when the yarn tension exceeds a limit allowable value of the oil agent adhesion state corresponding (correlated), the alarm 8 is output. Is activated.

FIG. 3 shows a polyester straight drawn yarn 75 denier 3
6 filaments spinning speed 5000m / min, oil viscosity 1
This shows the relationship between the tension state and the applied state of the oil agent when the oil supply amount is 1.8 cc / min at 00 cp. The smaller the adhesion rate of the oil agent, the higher the tension value level becomes. The tension fluctuation value increases with respect to the occurrence (point A) and the vibration of the winding frame (point B). In this case, the limit allowable value of the oil agent adhesion state is within 6 g of the tension fluctuation width, and if it exceeds this range, the oil agent adhesion unevenness is generated. Since such a limit allowable value varies depending on various factors such as the yarn speed, the yarn fineness, the viscosity of the oil agent, and the supply amount of the oil agent, an appropriate value may be determined in advance according to the conditions to be used.

As is clear from this figure, it can be seen that in order to clearly know the state of application of the oil agent, it is sufficient to consider both the tension level and the range of tension fluctuation, and it is easy to manage the application state of the oil agent. This makes it possible to produce an effective and stable product which is effective in suppressing dye spots and fluff on the yarn.

In this embodiment, a tension meter which applies tension in the axial direction of the focusing guide and detects the tension is shown. However, depending on the method of contact with the yarn, this tension meter may be used to extract tension by applying tension in the lateral direction. May use a tensiometer corresponding to this.

[0017]

As described above, according to the present invention, it is possible to accurately grasp the oil adhering state of the running yarn on-line, and it becomes extremely easy to control the increase in the number of spindles. Has a remarkable effect that it is possible to quickly and appropriately deal with the problem.

[Brief description of the drawings]

FIG. 1 is a process explanatory view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing another embodiment.

FIG. 3 is a diagram illustrating the relationship between the yarn tension and the amount of applied oil agent for explaining the operation of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spinning cylinder 2 Guide lubricating device 3 Yarn collecting guide 4 Tension meter 5 Amplifier 6 Recorder 8 Alarm

Claims (2)

(57) [Claims] In a method for online monitoring of an oil agent applied to a running yarn, a method is provided in which the oil agent is substantially discharged from an oil applying device.
A method for detecting oil adhering to a yarn, comprising taking out the tension of the running yarn immediately after the yarn is taken, and detecting the oil application state of the yarn in response to the fluctuation. 2. Running immediately after leaving the oil applying device.
An apparatus for detecting oil adhering to a yarn, wherein a tension meter is connected to a spindle of a yarn focusing guide that bundles the yarns, and an alarm is provided to the tension meter in conjunction with the tension meter.