JPH02307962A - Method for controlling amount of applied size by warp tension and controlling apparatus therefor - Google Patents

Abstract

PURPOSE:To prevent the flattening of the cross-section of a warp and to apply a size in high quality by comparing the detected tension of a warp group unreeled from a warp beam with a preset warp tension and applying a braking force to the beam to decrease the difference between the tensions. CONSTITUTION:A shaft of a warp roller is provided with a band brake having a fixed end and an end connected to an air cylinder. A warp tension data is memorized in a setter by using pressure value comprising the air pressure applied to the air cylinder corresponding to the variation of the bobbin diameter of the wound yarn. The tension data is compared with a detection signal trans mitted from a warp tension sensor and comparison result is operated and outputted as a correction electrical signal. The detected tension value is brought close to the preset value by controlling the air pressure applied to the air cylin der with an electro-pneumatic converter in response to the above correction signal pressure value. The amount of size attached to unit length of a warp can be controlled by this process.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to sizing control technology in a warp sizing machine (sizing), and involves fine control of the amount of sizing by controlling the tension of warp groups pulled out from each rough winding beam. In other words, the amount of sizing per unit length of warp threads is automatically controlled.

"Prior art and its problems" The sizing control technology in the conventional warp sizing machine is as disclosed in the inventor's previous application (Utility Application No. 58-193899), in which the amount of warp sizing is reduced and the pressing force of the rollers is used. A size control device has already been provided that automatically controls the size to a set value by adjusting the amount of size.This method measures a predetermined amount of size liquid into a size liquid tank using a flow meter in accordance with the feed rate of the warp threads. In order to maintain the water level in the size liquid tank at a predetermined value, the pressure of the squeezing roller that controls the amount of warp sizing is automatically controlled, thereby automatically controlling the amount of sizing per unit length of warp threads. It is something that can be managed.

However, with the above-mentioned sizing amount control device, the pressure roller for squeezing is controlled in relation to the warp feed, so although it is suitable for rough warp sizing control, if the sizing amount is significantly reduced, the pressure roller It is inevitable that the cross-sectional shape of the warp yarns will become flat due to the increase in the pressing force of the rollers. If the cross-sectional shape of the warp becomes flat, not only will it be difficult to control the amount of glue accurately and precisely, but the deformed cross-section will make it difficult to thread the belt through the weaving process, leading to warp breakage and uneven weaving density, which will cause defective cloth. It becomes.

In addition, it is impossible to finely adjust the amount of sizing using only the pressing force of the squeezing roller, and in order to achieve higher quality warp sizing, it is essential to develop other sizing techniques. There is.

``Problems and means to be solved by the present invention'' The present invention has been made in view of the problems of the sizing amount control device that controls the amount of warp sizing by adjusting the pressing force of a squeezing roller. We succeeded in providing a method and device for delicately controlling the amount of hegemony by controlling the tension of the warp threads pulled out from the beam, that is, delicately automatically controlling the amount of glue consumed per unit length of the warp threads.

A specific method for controlling the amount of glue is to automatically control the amount of glue consumed per unit length of the warp threads by controlling the tension of the warp threads pulled out from each rough winding beam. Furthermore, the first glue amount control device is equipped with a warp pull-out braking means for each rough winding beam, a tension detection member for the warp group pulled out from each rough winding beam, and the warp tension control member includes a warp tension setting device and a warp group. The warp tension is controlled to a predetermined value by controlling the braking means to a predetermined value using an electro-pneumatic converter based on comparison control from the tension detection member, and the amount of glue consumed per unit length of the warp is automatically controlled.

"Example" Fig. 1 is an implementation diagram showing an embodiment of the glue amount control method by warp tension control and its control device according to the present invention, and Fig. 2 shows an embodiment in which the braking means is controlled by an electro-pneumatic converter. The perspective view shown in FIG. 3 is a characteristic curve showing the relationship between the warp tension and the amount of glue per unit length of the warp.

In FIG. 1, reference numeral 1 denotes several rough-wound beams mounted on a beam stand S, from which countless groups of warp threads 2... are pulled out to form a warp group, and these warp thread groups are connected to guide rollers 3.
4 to a pair of air release rollers 5 and 6 of the warp sizing device M.
The warp threads are guided through the squeezing rollers 7 and 8 to a drying cylinder 9 in the warp dryer, and are wound up as a group of dried warp threads on a winding roller (not shown). The above air release roller 5
, 6 and squeezing rollers 7 and 8 (-T control takes the size liquid water level detection information in the size liquid tank and the feed information from the warp feed amount detection 20 into the control unit Go, and sets the setting size It has a known control configuration in which each cylinder C1, C2 is controlled by comparison calculation with information, and the amount of sizing per unit length of warp yarn is roughly automatically controlled to a predetermined value.The amount of sizing is determined as a proportion of the warp yarn. It is around 10%.

Next, a detailed explanation will be given of the present invention in which the above-mentioned glue amount control is delicately and minutely controlled by warp tension adjustment control. First.

Reference numeral 10 denotes a tension roller, which bends the warp thread path so as to be displaced in response to tension fluctuations, and this displacement is detected by a pressure sensor (load cell) LS. On the other hand, a double band brake BO that applies braking force to the shaft portion 1a of the rough rolling roller is mounted on the beam stand S as shown in the figure. That is, each end of the steel belt 15, 18 is connected to the bracket B via the connecting piece 17.
The other end is connected to the spring 18 and directly to the movable rod 20 of the air cylinder 19. 21 is a brake drum 1 provided on the shaft portion 1a of the beam 1;
The braking force of the band brake BO is adjusted by adjusting the tensile force of the movable rod 20 using air pressure that is press-fitted into the air cylinder 19. Above band brake Bo
In order to obtain a predetermined braking force F, a predetermined air pressure PL is press-fitted into the air cylinder 19.

The control system includes an electro-pneumatic converter 14, a braking force or warp tension setting device 13, and a comparator 12 with a pressure sensor (load cell) LS.

The braking force of the control system that corresponds to the change in the diameter of the bobbin winding of the beam 1, that is, the warp tension, must be kept constant throughout.
Therefore, the pressure value of the air pressure to the air cylinder 19 corresponding to the bobbin winding diameter is stored in the setting device 13 as yarn tension data, and this set value and the detection signal from the warp tension sensor LS are sent to the comparator 12. A corrected electrical signal is output. The electro-pneumatic converter 14 receiving this correction electric signal I converts the air cylinder 1 depending on the magnitude of the correction electric signal l.
It has the function of adjusting the air pressure P pressurized into the band brake 9, and depending on the magnitude of the detection signal from the tension sensor LS, a predetermined braking force F of the band brake Bo is obtained, and the related warp tension T is set at a set value TI. control so that it becomes

Figure 3 is a characteristic curve showing the relationship between the set value Tn of the warp tension T and the amount of glue per unit length of the warp. As a result, the amount of glue N is slightly reduced, and the amount of glue that accounts for 7 to 8% of the total amount of glue can be delicately and finely controlled. Therefore, by storing the correlation between the predetermined braking force F and the glue amount N in advance in the setter 13 or the comparator 12, the single glue amount control can be finely adjusted. In other words, the control principle is that the warp cross section expands and contracts in proportion to the warp tension, and the warp expands and contracts.This action squeezes out the amount of size liquid that adheres and permeates into the warp surface and warp space, and the warp The amount of glue applied is proportional to the tension. The above-mentioned control of the amount of pasting is carried out without changing the warp cross-sectional shape.

The present invention is not limited to the above embodiments; it goes without saying that the design may be changed within the scope of the invention.

"Effects of the Invention" According to the present invention, the glue amount control method automatically controls the amount of glue consumed per warp unit length by controlling the tension of the warp groups pulled out from each rough winding beam. It becomes possible to delicately fine-tune the amount of glue applied using a simple method, and higher quality warp thread glue can be performed.

Furthermore, each rough winding beam is provided with a warp pull-out braking means, and a warp tension detection member is provided for the warp group pulled out from each rough winding beam, and the warp tension control member is configured to perform a comparison between the warp tension setting device and the warp group tension detection member. Since the sizing amount control device controls the warp thread tension to a predetermined value by controlling the braking means using an electro-pneumatic converter, it is possible to finely adjust the sizing amount without flattening the cross-sectional shape of the warp threads. In addition to providing an adjustable sizing amount control device, warp tension control clarifies the relationship between sizing amount and warp tension management, allowing high-quality warp sizing while ideally controlling warp cross-sectional shape and warp tension. can be carried out.

[Brief explanation of the drawing]

FIG. 1 is an implementation diagram showing an embodiment of the glue amount control method by warp tension control and its control device according to the present invention, and FIG. 2 is a perspective view showing an embodiment in which braking means is controlled by an electro-pneumatic converter. FIG. 3 is a characteristic curve showing the relationship between the warp tension and the amount of glue per unit length of the warp. DESCRIPTION OF SYMBOLS 1... Aramaki beam, 2... Warp group, la... Shaft part, 10... Tension roller, Bo... Brake means (band brake), LS... Pressure sensor (load cell), 12 ...Comparator, 13...Setter, 14.
...Electro-pneumatic converter, 19...Air cylinder, T...Warp thread tension, To...Setting value, N...Sizing amount, F...Braking force, M...Warp thread sizing device . Applicant: Katsuzawa Electronic Technology Co., Ltd. Procedural amendment writing method>

Claims (2)

[Claims] (1) A method for controlling the amount of sizing based on warp tension, which is characterized in that the amount of sizing per unit length of warp is automatically controlled by controlling the tension of warp groups pulled out from each rough winding beam. (2) Each rough winding beam is equipped with a warp pull-out braking means, and a warp tension detection member is provided for the warp group pulled out from each rough winding beam, and the warp tension control member is equipped with a warp tension setting device and a warp group tension detection member. Controlling the amount of sizing based on warp tension, characterized in that the warp tension is controlled to a predetermined value by controlling the braking means to a predetermined value by controlling the brake means using an electro-pneumatic converter, and automatically controlling the amount of sizing per unit length of the warp. Device.