JPH0139720Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is designed to intertwine the yarn before winding, and when winding is performed using an automatic thread switching mechanism that automatically threads the thread and switches the thread. This invention relates to a yarn entanglement processing winding device that has been improved to increase the success rate of yarn threading and yarn switching. [Prior art] Conventionally, when obtaining synthetic fiber yarn by high-speed spinning or direct spinning, it is difficult to impart actual twist in the winding process, so it is necessary to perform an entanglement treatment with a fluid before winding. The method is widely used. As a device for winding after performing such yarn entangling processing, for example, an air entangling device and a guidance guide for guiding the yarn to a threading operation position near the winding bobbin at the time of threading and thread switching are used. 2. Description of the Related Art A yarn entanglement processing and winding device is known which is equipped with at least an automatic yarn switching mechanism that automatically performs yarn threading and yarn switching. When yarn entanglement treatment and winding are performed using this device, in order to produce stable yarn, the pressure of the air used for the entanglement treatment usually needs to be 3 to 8 kg/cm ² . As described above, thread threading and thread switching in the method of interlacing and winding in the yarn spinning process are generally carried out at the same level without changing the pressure of the air used for the interlacing process. However, when threading or thread switching is performed with air pressure at a high level of 3 to 8 kg/ ^cm2 , the resistance to the thread caused by the air is too large, causing the thread to wrap around the second godet roller, or causing the thread to become loose. This led to a decrease in the success rate of hooking and thread switching. [Problems to be solved by the invention] The invention aims to prevent the above-mentioned troubles during threading and thread switching, increase threading success rate and thread switching success rate, and improve workability and productivity. The main purpose of the present invention is to provide a yarn entanglement processing winding device that can perform the following steps. [Means for Solving the Problems] In order to achieve the above object, the present invention provides a detection means for detecting that the guiding guide is in the threading operation position, and is linked to the detection by the detection means. The yarn entanglement processing winding device is provided with a control means for reducing the air pressure supplied to the air entanglement device, and the following two means are useful as the detection means. (1) A position sensor that detects the position of the guidance guide. (2) A time control means is provided for issuing a command signal for operating the guidance guide according to a set time, and a time control means is provided for issuing a command signal for operating the guidance guide according to a set time, and a command signal is issued from the time control means for positioning the guidance guide at the threading operation position. means for using the command signal as a detection signal by the detection means; [Function] With such a device, it is possible to automatically reduce the air pressure supplied to the air entangling device only when threading and switching threads. The lower the level of air pressure to be reduced, the better in order to increase the success rate of threading and thread switching. However, the release of air was stopped and 0Kg/cm ²
If this is the case, the yarn wound before and after threading or thread switching will not have a cohesive property, which may cause problems with yarn quality during post-processing, tail removal at the beginning of winding, surface layer treatment, etc. This is not preferable because it causes a problem that the work becomes difficult. From these points, the air pressure when threading or changing threads should be 1.0Kg/ ^cm2 or less (0
Kg/cm ² is not included). The operations of the air entanglement processing device and the automatic yarn switching mechanism may be performed by normal sequence control. As described above, the means for detecting that the guide is in the threading operation position includes a position sensor of the guide, a detecting means using a signal from a time control means for controlling the guide, and the like. Hereinafter, the operating sequence of the apparatus according to the present invention will be explained with reference to the drawings. FIGS. 1 and 2 are schematic diagrams showing an embodiment in which a position sensor is used as the detection means,
Each shows the state when threading and the state when switching threads. In FIG. 1, the yarn Y that has passed through the first Godet roller 1, the second Godet roller 2, and the air entangling device 3 passes between the yarn path regulating guides 4 and is first sucked by the suction gun 7. Reference numeral 6 denotes a position sensor such as a limit switch that detects that the guide 5 is at the threading operation position (position C). When the winding tube 9 is threaded, the guidance guide operates in the following order. First, from position A to position B
Move to. Next, it moves from position B to position C, performs threading, and returns to position B. At this time, the presence of the guide at position C is detected by the position sensor 6, and a detection signal resulting from this detection is transmitted to the control means 8 for controlling the supply air pressure, thereby interlocking with this detection to prevent air entanglement. Reduce the supply air pressure to device 3. In this way, the supply air pressure can be automatically reduced only when the guiding guide 5 is at position C, which is the threading operation position. FIG. 2, which shows the thread switching process from the fully wound tube 10 to the empty wound tube 9, is similar to FIG. The control means 8 automatically reduces the supply air pressure. In the case of a detection means (not shown) that uses a signal from a time control means for controlling the guidance guide, the command signal issued from the time control means to position the guidance guide at the threading operation position is The detection signal output from the detection means is transmitted to the control means 8, and upon transmission of this detection signal, the control means issues a command signal to reduce the supply air pressure. The location of the object is indirectly detected. Threading and thread switching in the present invention include pirn winding, cheese winding, drum winding, etc., and the tube for winding the yarn may be a paper tube or a bobbin. [Effects of the invention] The yarn entanglement processing and winding device according to the present invention can automatically control the air pressure of the air entanglement device to be low only when threading and yarn switching, so that the yarn threading success rate and the yarn The switching success rate can be significantly improved, and workability and productivity can be improved. [Example (and Comparative Example)] As shown in the drawings, nylon 6 yarn melt-spun by a conventional method was subjected to air entanglement treatment at an air pressure of 3.0 Kg/cm ² , and then wound at a winding speed of 5000 m/min. Ivy. At this time, the yarn speed at the first threading is 2500.
m/min, and the air pressure was varied to various levels, and the success rate and characteristics of the obtained yarn were investigated. As can be seen from Table 1 showing the results, the supply air pressure when threading and thread switching was set to 1.0.
When the level was higher than Kg/cm ² , the success rate could not be improved sufficiently. Furthermore, when the value was 0 Kg/cm ² , the convergence of the yarn became poor, and the passability during post-processing was unsatisfactory. 【table】

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic diagrams showing an embodiment in which a position sensor is used as the detection means,
Each shows the state at the time of threading and the state at the time of thread switching. Y... Yarn, 1... First Goderola, 2...
Second godet roller, 3... Air entangling device, 4...
...Thread path regulation guide, 5...Guidance guide, 6, 6'
... position sensor, 8 ... control means, 9 ... air-wound tube, 10 ... fully-wound tube.

Claims (1)

[Scope of claim for utility model registration] (1) An air entangling device that applies air entanglement to the yarn before winding, and that guides the yarn to a threading operation position near the winding bobbin during threading and thread switching. In a yarn entanglement processing winding device that is equipped with at least an automatic thread switching mechanism that automatically threads threading and thread switching using a guidance guide, detection that detects that the guidance guide is in the threading operation position; A yarn entanglement processing winding device characterized in that the yarn entanglement processing winding device is provided with a control means for lowering the air pressure supplied to the air entanglement device in conjunction with detection by the detection means. (2) The yarn entanglement processing winding device according to claim 1, wherein the detection means is a position sensor that detects the position of the guide. (3) A time control means is provided for issuing a command signal for operating the guidance guide according to a set time, and a time control means is provided for issuing a command signal for operating the guidance guide according to a set time, and a command signal is issued from the time control means for positioning the guidance guide at the threading operation position. The yarn entanglement processing winding device according to claim 1, wherein a command signal obtained by the detection means is used as a detection signal by the detection means.