JPH0635707B2 - Pressurizing force setting control device in expansion device of glue machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing force setting control device in a diaphragm device of a paste machine, and more particularly, to a variable sticking amount by continuously variably controlling the pressing force of a diaphragm roller. The present invention relates to a pressurizing force setting control device in a squeezing device of a paste machine, which is capable of performing optimum control of

BACKGROUND ART A pasting machine is widely used in the weaving preparation process of the textile industry, but a general method for evenly applying a sizing material to a yarn is to pass a sizing roller and let the yarn contain a paste. When the excess glue is squeezed out by sandwiching it with the squeezing roller of the squeezing device, the pressure applied to the squeezing roller is optimally controlled (for example, Japanese Patent Publication No. 52-48666). That is, in the publication, depending on whether the machine is operating at low speed or at high speed,
The pressing force of the squeezing roller is controlled so as to be lower than that of the former and higher than that of the latter, so that the amount of adhered thread after passing through the squeezing roller can be made uniform,
Furthermore, the pressing force of the squeezing roller is removed by pushing up the top roller that constitutes the squeezing roller when the machine is stopped for a long period of time. There is disclosed a technology capable of giving

Then, it was found in the subsequent research that the pressing force of the squeezing roller when the machine was stopped requires special consideration in order to eliminate the possibility of forming a so-called stop mark. In other words, when the pressing force of the squeezing roller is insufficient while the machine is stopped, the glue flows through the gap between the threads sandwiched by the squeezing roller to the downstream side of the roller, so that the large amount of glue on the thread While forming a lump (a so-called glue ball) and causing a stop mark, an excessive pressure force flatly crushes the cross section of the yarn nipped by the squeezing roller, which causes deterioration of product quality. Here, the stop mark due to the excessively large amount of glue adhered locally causes poor weaving in the subsequent step,
It is particularly important because it is easy to cause defective peeling and defective dyeing. Therefore, it is safer to increase the pressurizing force while the machine is stopped, and it is significantly insufficient to make the pressurizing force equal to the pressurizing force during low speed operation as has been conventionally said.

Furthermore, when accelerating the machine from a low-speed operating state to a high-speed operating state, or when decelerating a machine in a high-speed operating state to stop it, simply add the squeezing roller in a stepwise manner as in the prior art. There is also a problem that the excess or deficiency of the local amount of adhered glue due to the imbalance between the speed and the pressing force cannot be avoided only by changing the pressure.

SUMMARY OF THE INVENTION Therefore, in view of the actual situation of the prior art and the research results thereafter, an object of the present invention is to increase the pressing force of the squeezing roller during machine stop at least higher than that during machine low speed operation, and to minimize the necessary amount. By eliminating or reducing the stop mark and preventing the yarn from becoming flat by setting the optimum value, the optimum pressing force command value that matches the current speed is output even during acceleration or deceleration. SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressing force setting control device for a throttle device of a new laminating machine, which is capable of realizing a uniform amount of adhered glue for all machine operating states.

Configuration of the Invention In order to achieve the above object, the configuration of the present invention is provided with a data setting means, and at least the pressing force at the time of stopping the machine and the low speed operation, and the speed and the pressing force at the high speed operation of the machine While enabling data to be set, a pressing force curve is uniquely defined using this data, and by referring to the pressing force curve, the machine operating state is grasped from an external signal including the speed of the machine, A pressurizing force command value calculating means for calculating and outputting a pressurizing force command value corresponding thereto is provided, and when the machine is stopped,
The pressing force of the squeezing roller is controlled to follow this pressing force command value by outputting a pressing force command value which is higher than that during low speed operation and which is constant during machine operation, and which increases monotonically with increasing machine speed. Therefore, the gist is that the optimum pressure control can be realized not only while the machine is stopped but also during acceleration / deceleration.

Example Hereinafter, an example will be described with reference to the drawings.

The pressing force setting control device 10 for use in the squeezing device of the glue machine comprises a data setting means 11 and a pressing force command value calculating means 12, whose output controls the pressing force of the squeezing roller 1. Connected to the pressure servo valve 4 of
Figure).

The bottom roller 1b of the squeezing roller 1 is positively driven in the direction of the arrow in the figure by a drive source (not shown), while the top roller 1a contacts the bottom roller 1b from above and is negatively driven. A yarn sheet A formed by arranging yarns in a plane is sandwiched to perform a squeezing operation. The bottom roller 1b has its shaft position immovable, while
The top roller 1a is axially attached to the tip of an arm 3 which is pivotally supported near the center by a pin 3a, and is vertically movable. The other end of the arm 3 is pin-coupled to the tip of a piston rod 2a of the air cylinder 2, and the air cylinder 2 is a clevis-type cylinder whose cap side is rotatably attached to a machine frame. The pull-side port is open to the atmosphere, while the push-side port is connected to the pressurized air source 5 via the pressure servo valve 4. Here, the pressure servo valve 4 is capable of controlling the pressure on the output port side in response to an electric input signal, and is preferably a proportional control valve.

It is assumed that the pressing force setting control device 10 has its internal function realized by software by a well-known microcomputer including an input / output device, a central processing unit, and a storage device.

The data setting means 11 uses, for example, a keyboard to
To define a pressing force curve to be described later, a pressing force P _O when the machine is stopped, a speed _VL and a pressing force P _L during low speed operation, a speed V _H and a pressing force P _H during high speed operation are set and stored. To do. Each of these data can be selected and determined from the experimental data so that the amount of glue adhered is optimum.

The pressing force command value calculation means 12 receives the respective data set and stored by the data setting means 11, and
A control signal C indicating whether the machine is currently operating,
If it is operating, a speed signal V indicating the speed is input and a pressing force command value P corresponding to the current operating state of the machine is calculated, which is then converted into a voltage signal by a DA converter (not shown). After being converted into, it is output to the pressure servo valve 4.

The operation of the pressing force setting control device having such a configuration is as follows.

The data setting means 11 comprises, for example, a setting program shown in the flowchart of FIG. That is, from the keyboard (not shown), the P _O , V _L , P _L , V
Each data of _{H 2} and P _H is set and stored in the storage device. Here, P _O is
The optimum pressing force applied to the squeezing roller 1 is such that an excessive stop mark is not formed on the thread sheet A and the thread cross section is not flattened.
Made of denier / 72 filament polyester filament yarn, the squeezing roller is a rubber roller with hardness of 65 °,
In the warper when the paste material has a viscosity of about 4.0 cps made of an acrylic ester-based copolymer, it is about 710.
kg was optimal. Other data show that V _L = 5 (m / m
in) P _L = 170 (kg), V _H = 300 (m
/ Min) because showed _P H = 650 (kg) is Naru good results for, it may be used each of these values.

The contents of the pressing force command value calculation means 12 are shown in the calculation control program of FIG. That is, first, the control signal C indicating the operating state of the machine and the operating speed signal V of the machine are read (step (1) of the arithmetic control program, hereinafter simply referred to as (1)). Then, each data of P _O , V _L , P _L , V _H , and P _H that was previously set and stored is read (2), and if the machine is stopped (3), the pressing force command value P
Is set to a constant value P _O (5), which is converted into the air pressure P ′ to be applied to the air cylinder 2 (6) and then output to the pressure servo valve 4 (7).

On the other hand, when the machine is in operation (3), the pressing force command value P is calculated using the current operation speed signal V of the machine (4),
This is converted into the air pressure P'in the same manner as described above and output to the pressure servo valve 4 (6), (7).

Here, the calculation of the pressing force command value P in step (4) is performed using the previously set V _L , P _L , V _H , and P _H.
P = (P _H −P _L ) V / (V _H −V _L ) − (V obtained by linearly interpolating between two points L (V _L , P _L ) and H (V _H , P _H ). _{H P L -V L P H)} / (V H -V
_L) ... (1) or, P a simplified this _{= (P H -P L) V} / V H + P L ... (2) ^{_{Further, P = (P H -P L}} ) V n / V H n Any one of + P _L (3) shall be determined and used by an experiment. However, n is a constant of 1 to 2, and when using the simplified formula (2), data of V _L is not necessary.

After all, the value of the pressing force command value P calculated and output by the arithmetic control program corresponds to the control signal C and the speed signal V, and generally becomes like the pressing force curve of FIG.
The solid line represents the equation (2) and the dotted line represents the equation (3).
FIG. 4 shows that when the machine is stopped, the optimum pressing force P _O is higher than that during low-speed operation, and during machine operation, it is continuous with the current speed V and increases monotonically. Since the pressurizing force is applied, the optimum pressurizing force set value P corresponding to the speed V at that time can always be obtained not only during the stoppage of the machine or the low speed operation but also during the acceleration / deceleration.

Here, in comparing the block system diagram of FIG. 1 with FIGS. 2 and 3, the data setting means 11 corresponds to step (1) of FIG. It is clear that this corresponds to steps (3), (4) and (5) in FIG.

FIG. 5 (B) is an example of the pressing force command value pattern obtained in this way with respect to the operating speed pattern of the machine of FIG. 5 (A).

In the above description, the control signal C can be discriminated also from the magnitude of the speed signal V, and is not necessarily essential.

Further, the squeezing roller 1 is not limited to a single row consisting of a pair of the top roller 1a and the bottom roller 1b, but may be a double row, in which case the addition of the top roller 1a in the last row. It is sufficient to control the pressure. It goes without saying that the pressing force control method by the vertical movement of the top roller 1a is not limited to the combination of the arm 3 and the air cylinder 2 shown in FIG. 1, but may be any other method.

Other Embodiments The pressing force setting control device 10 in the previous embodiment is composed of software by a microcomputer, but it may be composed of a combination of analog arithmetic units (sixth embodiment).
Figure). That is, the data setters 14, 15, 16, and 21 for setting the data of P _L , V _L , P _H , and V _H are provided,
The output and the speed signal V are input to the frequency generator 17, and the addition corresponding to the curve that complements between the two points L (V _L , P _L ) and H (V _H , P _H ) described above. Create pressure command value P,
The output, via a contact 18a of a relay 18 operated by the control signal C, after switching the output of the P _O data setter 13, and converts the air pressure P 'by the calculator 19, the pressure servo valve 4 Output.

However, here, on the premise that the data setter 21 for the speed V _H during high-speed operation takes the same value as the high-speed operation speed of the actual machine when the high-speed operation speed when determining the pressing force curve is set.
It is also used as a high-speed operation speed setting device for giving a speed command value to the control amplifier 22 of the operation speed control system 20 of the machine, but it goes without saying that each of them can be provided independently.

EFFECTS OF THE INVENTION As described above, according to the present invention, the data setting means is provided, and the data including the pressurizing force at the time of machine stop and the low speed operation, and the speed and the pressurizing force at the high speed operation can be set. , The pressure curve of the expansion device is defined using these data, and the pressure command value calculation means for calculating and outputting the pressure command value corresponding to the operating state of the machine is provided. By calculating and outputting a pressure force command value that is constant and that increases monotonically with speed during operation, and correspondingly controlling the pressure force of the squeezing roller, the machine can be used in all operating conditions of the machine. Since the optimum pressure can be set for the squeezing roller,
Not only can the stop mark be eliminated or reduced at the time of stop and the flattening of the yarn can be prevented, but the optimum pressure can be set for all machine operating speeds, including during acceleration and deceleration, so that the amount of glue applied is always controlled evenly. There is an excellent effect that can be realized.

[Brief description of drawings]

1 to 5 show an embodiment, FIG. 1 is an overall block system diagram, FIG. 2 is a flow chart of a setting program, FIG. 3 is a flow chart of an arithmetic control program, and FIG. 4 is a pressurizing force curve. FIG. 5 and FIG. 5 show characteristic patterns in use, in which (A) is a velocity pattern and (B) is a pressing pattern corresponding to (A). Sixth
The figure is a block diagram of a main part of another embodiment. P O _...... stop the pressure P L _...... pressure of the low-speed pressurizing V H _...... fast rate P H _...... high speed during operation during operation during operation 11 ...... data setting unit 12 ...... pressure-force command Value calculation means

Claims (2)

[Claims] 1. A data setting means for setting at least the pressure force at the time of stopping the machine and the low speed operation of the machine, and the data of the speed and the pressure force at the high speed operation of the machine, and a pressure curve by the respective data. And a pressing force command value calculating means for calculating and outputting a pressing force command value corresponding to the machine operating state, and when the machine is stopped, a constant pressing force command value higher than that during low speed operation of the machine is output. On the other hand, during the operation of the machine, the pressing force setting control device in the expansion device of the glue machine is configured to output a pressing force command value that monotonically increases as the machine speed increases. 2. A throttle device for a pasting machine according to claim 1, wherein the speed data during high speed operation is shared with a speed command value from a high speed operation speed setting device of the machine. Force setting control device in.