JPH0333639A - Apparatus for measuring viscosity of size solution for sizing warp yarn - Google Patents

Abstract

PURPOSE:To avoid the measuring error caused by the solidification of a size solution by measuring the dripping time of the size solution until the total wt. reaches a set value after a viscosity cup is drawn up above the surface of the size solution. CONSTITUTION:The viscosity cup 4 arranged so as to face to the size solution 2 received in a size tank 1 from above is connected to the plunger 7a of a fluid pressure cylinder 7 by a cord 6 and immersed in the size solution at a flaling position by the advance of the plunger 7a. The cylinder 7 is operated by the signal from a controller 13 and the cup 4 is raised to be taken out of the size solution to be placed at a measuring position. The dripping of the size solution begins from this time and a time measuring device 18 is set to start measurement. A load cell 14 detects the total wt. of the cup 4 changing with the dripping of the size solution and the output thereof is amplified by an amplifier 15 to be inputted to a comparator 16. When the input value from the load cell 14 becomes equal to the set value from a setting device 17, the time measuring device 18 is reset by the signal from the comparator 16. The measured time is displayed on an output device 19 and the viscosity of the size solution can be known from said measured time.

Description

Detailed Description of the Invention (Field of Application in Industry A) This invention relates to a device for detecting the viscosity of a size liquid for warp sizing, and more specifically, it relates to a device for measuring the viscosity of a size liquid for warp sizing using a viscocity cup in the warp sizing process. The present invention relates to an improvement in technology for maintaining a constant amount of glue attached to warp threads by detecting the amount of glue attached to the warp threads.

(Prior Art) Hereinafter, in this specification, the sum of the weight of the viscocity cup and the weight of the glue remaining in the viscocity cup at a certain timing will be referred to as "total weight."

Viscocity cups have been widely used to detect the viscosity of starch liquids. This viscocity cup is designed to allow glue to drip from an opening in the funnel-shaped bottom of the cylindrical cup. When detecting the viscosity of the size liquid using the manual method, the viscocity cup is immersed in the size liquid, left until it reaches the same temperature, and then pulled out. All of the size liquid in the viscocity cup drips out from the bottom opening. Measure the time required to do this, and refer to pre-prepared data showing the relative relationship between this dropping time and viscosity (usually provided as a graph for each size composition and the shape of the viscocity cup). Estimate the glue liquid viscosity. Although this method estimates the relative viscosity from the time when dropping is completed, the relative viscosity can also be similarly estimated from the total weight of the viscocity cup after the start of measurement. That is, the relative viscosity can be estimated based on the time it takes for the total weight of the viscocity cup to reach a predetermined weight after the start of measurement. Detection technology related to this weight was already developed in the 1970s.
-44965. However, in this prior art, since the viscocity cup is held outside the size liquid when not measuring, the size liquid adhering to the viscocity cup during measurement solidifies during this period. As a result, as the measurements are repeated, the internal volume of the viscocity cup changes, and the initial amount of glue contained therein also changes, so measurement errors are inevitable.

(Summary of the Invention) An object of the present invention is to eliminate measurement errors in a viscosity measurement method using a viscocity cup.

Therefore, in the first invention of this application, the viscocity cup is held at a measuring position outside the glue tank for a predetermined period of time by a viscocity cup drive mechanism, and the viscocity cup is engraved by a weight measuring device such as a load cell combined with this drive mechanism. A comparator compares the electrical value input from the weight measuring device with the set value, and when the two become equal, outputs a signal. The time measuring device is set by the signal output from the drive mechanism when the is placed at the measurement position, the time measuring device is reset by the signal from the comparator, and the time from setting to reset is measured. The purpose of this study is to estimate the viscosity of .

Furthermore, in the second invention of this application, the viscocity cup is held at a measurement position outside the gl phase for a predetermined period of time by a viscocity cup drive mechanism, and a weight measuring device such as a load cell combined with this drive mechanism is used to hold the viscocity cup at an open side. Detects the total weight of , outputs the corresponding electrical value, performs a predetermined calculation on this electrical value using a calculator, and causes the measurement start command unit to output a measurement start regulation signal, and uses this measurement start regulation signal to measure time. A comparator compares the time input from the time measuring device with a set value corresponding to a predetermined time, and outputs a signal when the two become equal. The gist of the present invention is to store the electric value from the arithmetic unit in the memory unit at the time when the signal from the arithmetic unit is received.

(Embodiment) The manner in which the total weight of the viscocity cup changes varies depending on the viscosity of the paste liquid. As shown in FIG. 3, a paste liquid with a high viscosity shows a change as shown in curve A, and a paste liquid with a low viscosity shows a change as shown in a curve B.

In connection with this, there are two ways to measure the viscosity of the size liquid 2. First, measure the time TA or TB when the total weight becomes a certain value, for example, equal to the self-weight of the viscocity cup 4 (this is when the curve becomes parallel to the X axis in Fig. 3). is the first example. In this case, an electrical value corresponding to the weight EF corresponding to its own weight may be given to the setting device 17 as a set value. In the second example, the total weight is then measured at a certain time TF after the start of dropping of the glue solution.

In the first invention of this application, the time required for dropping a constant amount of glue liquid is measured, and a specific example thereof is shown in FIG.
A) to (C) will be shown and explained.

The first embodiment shown in FIG. 1(A) is
The time taken for the total weight to reach a predetermined value after the start of measurement is measured. Here, the arithmetic unit 30 is constituted by an amplifier 15. In the illustrated state, the viscocity cup 4 is positioned facing the size solution 2 contained in the size tank 1 from above. That is, the viscocity cup 4 is at the measurement position.

This viscocity cup 4 is connected by a cord 6 to a plunger 7a of a hydraulic cylinder 7 via a guide roller. When the plunger 7a advances, the viscocity cup 4 is placed in the lowered position and immersed in the size liquid 2, and when the plunger 7a is withdrawn, the viscocity cup 4 is placed in the raised measuring position and immersed in the size liquid 2. be pulled upwards. That is, the viscocity cup 4 is raised and placed at the measurement position during measurement, and lowered and placed at the non-measurement position when not measured.

The timing of advancing and retracting the plunger 7a of the fluid pressure cylinder 7 is controlled by a controller 13. Further, a main switch 11.12 is provided corresponding to the advanced position and the retracted position of the plunger 7a.
It is connected to the.

The limit switch 12 corresponding to the retracted position of the plunger 7a is also connected to a time measuring device 18. This hinge switch 12 is connected to a time measuring device 18 as will be described later.
This is to set the .

As will be described later, this time measuring device 18 measures the time required for the glue from the viscocity cup 4 to drip down to a predetermined total weight, and the result is sent to an output device 19 such as a display or printer. Visibly displayed.

Load cell 1 is on one side of the guide roller that guides code 6.
4 is assembled. This load cell 14 is a known one that outputs an electrical value corresponding to the force (which is proportional to the total weight) applied to it via a guide roller. Load cell 14 is connected to one input terminal of comparator 16 via amplifier 15. Further, a setting device 17 is connected to the other input terminal of the comparator 16. Comparator 16
The output side of is connected to the time measuring device 18, and its output resets the time measuring device 18 as will be described later.

Next, its effect will be explained.

When not measuring, the plunger 7a is advanced and the limit switch 11 is pressed down, and the viscocity cup 4
is placed in the lowered non-measuring position and immersed in the glue 2. In this state, the time measuring device 18 is in a reset state.

When the measurement is tied, the cylinder 7 is actuated by a signal from the controller 13, the plunger 7a is retracted and the limit switch 12 is pressed down, and the viscocity cup 4 is raised and placed at the measurement position. He is thrown and escapes from the paste 2. At this time, the glue starts to drip and the liquid level in the viscocity cup 4 gradually decreases from the FULL state.

On the other hand, the output signal from the constant switch 12 is also input to the time measuring device 18, and the time measuring device 18 is set and starts time measurement from this point. At the start of this measurement,
The liquid level in the viscocity cup 4 has fallen by a predetermined distance from the FULL liquid level. This is Visco City Cup 4
This is because the glue liquid 2 has already dripped during the process of moving to the measurement position. In this embodiment, the signal from the limit switch 12 is used not only as a signal for positioning the measurement position of the viscocity cup 4, but also as a signal for instructing the time measurement device 18 to start measurement. It's being used. It goes without saying that dedicated switches may be provided for each function, if necessary.

On the other hand, the load cell 14 transmits the electric value of each moment corresponding to the total weight that changes (decreases) as the glue is dripped into the amplifier 1.
5 to a comparator 16, which compares these electrical values with the set value from the setting device 17.

When the input electrical value from the load cell 14 becomes equal to the set value, the comparator 16 outputs a signal, and this signal resets the time measuring device 18. The time measuring device 18 measures the time from setting to resetting, and outputs an electrical value corresponding to the time to the output device 19. By comparing the visually displayed results with the data on hand, the operator can know the current viscosity of the paste.

After a predetermined time after the measurement is completed, the controller 13 again gives a signal to the cylinder 7, the plunger 7a advances again and the limit switch 11 is pressed down, and the viscocity cup 4 descends again and fills the size liquid 2.
It is immersed inside and placed in a non-measuring position.

Note that the time required for the controller 13 to return the plunger 7a from the retracted state to the advanced state may be set to be slightly larger than the expected maximum value of the time measured by the time measuring device 18. Alternatively, the state may be returned to the advanced state immediately after the signal from the comparator 16 is output. In this way, the time during which the viscocity cup 4 is exposed to the atmosphere (during which time the paste tends to solidify) can be minimized.

The second embodiment is shown in FIG. 1(B), in which the time until the "dropped weight" indicating the total weight of the glue 2 dropped after the start of measurement reaches a predetermined value is measured. Here, computing unit 3
0 is composed of an amplifier 15, a memory 25 and a subtracter 26.

The memory 25 receives signals from the amplifier 15 and the limit switch 12, and when the signal from the limit switch 12 is input, stores the signal from the amplifier 15, that is, the total weight at the time of starting measurement. The subtracter 26 is the amplifier 15
It inputs the signals from the storage device 25 and the memory 25, and outputs the difference between the two signals. This difference indicates the dropped weight from the start of measurement to the present. Naturally, the setting value of the setting device 17 is a predetermined value corresponding to this dropped weight.

FIG. 1(C) shows a third embodiment, in which the time from the start of measurement until the differential value of the total weight reaches a predetermined value is measured. Here, the arithmetic unit 30 includes an amplifier 15 and a differentiator 2.
0.

The differentiator 20 outputs the differential value of the output signal of the amplifier 15, that is, the amount of change in total weight per unit time. When this amount of change becomes zero, the total weight becomes the Viscocity Cup's own weight. Naturally, the set value of the setter 17 is set to a predetermined value (for example, "O") corresponding to this differential value. In addition,
According to this embodiment, since changes in weight are monitored, accurate viscosity measurement is possible even if the calibration of the weight measuring device is slightly off.

Furthermore, the second invention of this application measures the weight after a certain period of time has elapsed. The embodiments shown in FIGS. 2(A) and 2(B) will be specifically explained below.

In the case shown in FIG. 2(A), the total weight is measured after a predetermined period of time has elapsed from the start of measurement, and the computing unit 30 is connected to the amplifier 1.
5. The time measuring device 21 starts measuring time when the signal from the limit switch 12 is input. The comparator 22 compares the time signal from the time measuring device 21 with a set value corresponding to a predetermined time set in the setter 23, and outputs a signal when the two match. Memory device 24
stores the output signal of the amplifier 15 when the signal from the comparator 22 is input, that is, the total weight after a predetermined period of time has elapsed since the start of measurement.

In the case shown in FIG. 2(B), the dropped weight is measured after a predetermined period of time has elapsed from the start of measurement, and the arithmetic unit 30 is composed of an amplifier 15, a memory 25, and a subtractor 26. The memory 25 receives the signals from the amplifier 15 and the limit switch 12, and when the signal from the main switch 12 is input, stores the signal from the amplifier 15, that is, the total weight at the time of starting measurement. The subtracter 26 inputs the signals from the amplifier 15 and the memory 25 and outputs the difference between the two signals, that is, the dropped weight from the start of measurement to the present.

In each of the above embodiments, the time measuring device starts measuring by using a limit switch signal, but instead of this, the point in time when the total weight of the viscocity cup reaches a predetermined weight is detected, and at this point The measurement may be started from. Alternatively, a known liquid level detector may be installed in the viscocity cup to detect the point in time when the liquid level in the viscocity cup reaches a predetermined level, and to start measurement from this point. Good too.

Further, as a weight measuring device for measuring the total weight of the viscocity cup, for example, a piezoelectric element may be used instead of the load cell.

Further, although the retracted and advanced positions of the plunger are detected by limit switches, a non-contact proximity switch may be used instead.

It goes without saying that these switches are unnecessary if the stroke of the cylinder is predetermined. At this time, a switch for instructing the start of measurement is separately provided.

As is clear from the above, according to the present invention, the time during which the viscocity cup is exposed to the atmosphere is minimized, so that solidification of the size liquid is less likely to occur. Furthermore, even if there is some solidification during measurement, since the viscocity cup is immersed in the size liquid for a long time when not being measured, the solidified size liquid will also be dissolved again. Therefore, measurement errors caused by solidification of the size liquid can be effectively avoided.

[Brief explanation of drawings]

1(A) to 2(B) are block diagrams showing various embodiments of the apparatus of the present invention, and FIG. 3 is a graph explaining its operation. 2...Size liquid 4...Viscocity cup 1
1.12... Limit switch 13... Controller 14... Load cell 16... Comparator 18... Time measuring device 19... Output device

Claims (1)

[Scope of Claims] [1] A viscocity cup drive mechanism that has a basic structure using a viscocity cup that enters and exits the glue solution, and that lifts the viscocity cup from the glue tank for a predetermined period of time and holds it at a measurement position; A weight measuring device (14) is combined with the drive mechanism and outputs an electrical value corresponding to the total weight of the viscosity cup.
), a computing device (30) that performs a predetermined calculation on the electrical value input from the weight measuring device, and a measurement start command device (12) that outputs a signal to specify the start of measurement of the time measuring device described below. and a comparator (16) that compares the signal input from the arithmetic unit with a predetermined set value and outputs a signal when the two become equal; and a comparator (16) that receives the signal output from the measurement start command device. A viscosity measuring device for a warp sizing sizing liquid, comprising a time measuring device (18) which is set and reset upon receiving a signal from a comparator, and which measures the time between being set and being reset. [2] The device according to claim 1, wherein the arithmetic unit outputs a total weight. [3] The device according to claim 1, wherein the computing unit outputs a dropped weight. [4] The device according to claim 1, wherein the arithmetic unit outputs a differential value of the total weight. [5] The device according to any one of claims 1 to 4, further comprising an output device that visually displays the measurement results of the time measuring device. [6] A viscocity cup drive mechanism which has a basic structure using a viscocity cup that enters and exits the glue solution, and which lifts the viscocity cup from the glue tank for a predetermined period of time and holds it at a measurement position; A weight measuring device (14
), a computing device (30) that performs a predetermined calculation on the electrical value input from the weight measuring device, and a measurement start command device (12) that outputs a signal to specify the start of measurement of the time measuring device described below. and a time measuring device (21) which is set in response to the signal output from the measurement start command device and starts measuring time, and the signal inputted from the time measuring device is compared with a predetermined setting value, and both of them are confirmed. A warp glue comprising a comparator (22) that outputs a signal when they become equal, and a memory (24) that stores the electrical value from the arithmetic unit at the time when the signal from the comparator is received. Viscosity measuring device for adhesive paste. [7] The device according to claim 6, wherein the arithmetic unit outputs a total weight. [8] The device according to claim 6, wherein the computing unit outputs a dropped weight. [9] The device according to any one of claims 6 to 8, further comprising an output device that visually displays the value of the memory.