JPH06313260A - Size-viscosity controlling apparatus of sizing machine - Google Patents

Abstract

PURPOSE:To stably keep the viscosity of a sizing liquid by detecting and controlling the temperature and viscosity of a sizing liquid to preset target levels and, when the detected viscosity exceeds the target level and becomes uncontrollable, introducing hot water of a specific temperature from a hot water tank to a cavity. CONSTITUTION:The temperature and the viscosity of the sizing liquid 4 in a cavity box 3 are detected by a temperature detector 21 and a viscosity detector 23 of a sizing liquid viscosity controlling apparatus 2 of a sizing machine 1. A direct heat source 12 and an indirect heat source 13 are controlled through a temperature controller 14 and a viscosity controller 15 to keep the detected values at the target values preset by a temperature setter 22 and a viscosity setter 24. If the viscosity of the sizing liquid 4 increases beyond the above target value and becomes uncontrollable by the heat-sources 12, 13, an operator 44 is actuated by a viscosity control signal of the viscosity controller 15 to introduce hot water 41 from a hot water tank 40 controlled to the sizing liquid temperature into the cavity box 3 to adjust the viscosity of the sizing liquid 4 to the preset target level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the viscosity of a sizing liquid of a sizing machine.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 2-191736 discloses a technique for controlling the viscosity of a paste liquid, which uses a temperature control system and a viscosity control system for the paste liquid in a cavity box to contain a large amount of water. A technique for controlling the temperature and viscosity of the paste liquid to a target value by heating and cooling the paste liquid with a direct heat source such as water vapor or an indirect heat source such as an electric heater having no moisture is disclosed. .

In the control system, since the temperature of the sizing liquid is generally maintained at about 90 degrees Celsius, the water is constantly vigorously evaporated from the surface of the sizing liquid and the sizing liquid adheres to the running yarn. , The paste solution in the cavity box is consumed, and when adding the paste solution corresponding to the increase in viscosity due to the evaporation of water and the amount of paste solution consumed, the paste solution with high concentration is used. When was added, the viscosity was high, and in correcting it, more water vapor contained in the heat source was made to act, and the water content of the water vapor was injected into the glue solution. . However, in this process, the temperature of the paste solution rises too much, so the viscosity of the paste solution must be reduced by cooling the paste solution in the cavity box with a cooler.

[0004]

It is an object of the present invention to improve the response of the control of the paste viscosity, and not to adversely affect the temperature control system in the control process, and to quickly return the viscosity of the paste liquid to the target value with an inexpensive device. To do so.

[0005]

Based on the above-mentioned object, the applicant of the present invention, in a temperature / viscosity control system, when the viscosity of a paste solution exceeds a control range and becomes high, and becomes hard, By injecting an appropriate amount of water, it was attempted to return the viscosity of the paste solution to the lower direction. However, in the process of injecting water, when the temperature of the water is higher than the temperature of the paste liquid, the paste liquid gels into an insoluble jelly, and when the temperature of the water is lower than the temperature of the paste liquid, It was found that the paste solution turned into an emulsion sol and the performance of the paste solution itself changed.

Therefore, as a means of solving the present invention, the applicant of the present invention determines the temperature of water to be injected in advance when injecting an appropriate amount of water into the paste solution to return the viscosity of the paste solution to the lower direction. The temperature is controlled so that it is almost the same as the temperature of
Gelation is prevented in advance, and the viscosity of the glue solution can be returned to the target value in a short time and with an inexpensive device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment will be described in detail with reference to FIG. 1 as to the constructions of a gluing machine 1 and a glue viscosity control device 2 of the present invention. The gluing machine 1 stores the gluing liquid 4 inside the cavity box 3, and the gluing liquid 4 is pumped by the pump 5.
Excessive supply to the inside of the sizing box 6 causes it to overflow, so that the sizing box 6 is circulated back to the inside of the cavity box 3.

On the other hand, the yarn sheet 7 is guided by the guide roller 8, dipped in the sizing liquid 4 inside the sizing box 6 by the sizing roller 9, and is squeezed by the two squeezing rollers 10. As the sizing liquid 4 is consumed in the sizing box 6, the sizing liquid 4 ′ having a predetermined concentration and a temperature substantially the same as the temperature of the sizing liquid 4 is supplied to the cavity box 3 from the feed tank 11. .

As shown in FIG. 1, the glue viscosity control device 2 of the present invention comprises a heat source, a control portion and a hot water supply portion. As the heat source, a direct heat source 12 and an indirect heat source 13 are used. In order to control these two heat sources,
A temperature controller 14 and a viscosity controller 15 which constitute a control unit described later are provided.

The direct heat source 12 is water vapor, which is directly injected into the paste solution 4 in the cavity box 3 through the operation device 16 such as an electric valve and the piping to heat the paste solution 4 and at the same time, to heat it. Rehydrate. In addition, indirect heat source 1
Reference numeral 3 is a heat source such as electricity or steam, and indirectly heats the paste liquid 4 in the cavity box 3 by a heat exchanger 18 via an operating device 17 such as an electric valve or a switch and a power supply path or piping. Let it work.

The control section is composed of a temperature controller 14 and a viscosity controller 15. This temperature controller 14
Is the cavity box 3 via the comparison point 19 on the input side.
Is connected to a temperature detector 21 and a temperature setter 22 for setting a target temperature, which is provided with a PID controller and an amplifier inside thereof, and a PID operation is performed based on a deviation between the detected temperature and the target temperature. , Generates a signal F for temperature control that directly controls the opening degree of an operating device 16 such as an electric valve of the heat source 12.

Further, the viscosity controller 15 is connected to a viscosity detector 23 for the paste 4 and a viscosity setter 24 for setting a target viscosity via a comparison point 20 on the input side, and a PID controller and an amplifier are provided therein. Based on the deviation between the detected viscosity and the target viscosity, a signal C1 for controlling the opening degree of the electric operating device 17 of the indirect heat source 13 and the detected viscosity exceed the target viscosity under the PID operation. When the indirect heat source 13 is stopped, a signal C2 for controlling the supply amount of hot water from the hot water tank 40 described later is generated.

The hot water supply section is composed of a hot water tank 40 and a hot water controller 52. The hot water tank 40 is provided near the cavity box 3 in order to supply the hot water 41 to the glue solution 4. In addition, the warm water 41 is supplied from the outside by a manipulator 42 to a warm water inlet 43.
Is supplied to the hot water tank 40 as needed, and then the controller 44 is controlled by the signal C2 from the viscosity controller 15 to control the operation box 44 from the hot water outlet to the cavity box 3.
Is replenished inside. Here, as the hot water 41 supplied from the outside, hot water directly supplied from a dedicated boiler or hot water used in the vicinity of the gluing machine 1 or steam condensate supplied to a drying cylinder and a drying device is used. I shall.

Further, the temperature controller 52 includes a temperature detector 4 inside the hot water tank 40 via a comparison point 51 on the input side.
7 and the temperature setter 50 for setting the target temperature,
An amplifier is provided inside it and generates a signal I for controlling the temperature based on the temperature deviation. The heat source 49 is applied to the hot water 41 in the hot water tank 40 by controlling the on / off of the operating device 48 by the signal I. Here, the heat source 49 is steam or an electric heater in this embodiment. Therefore, the operating device 48 is configured as an on / off valve for water vapor or an on / off switch for electricity.

Next, the above viscosity deviation and the direct heat source 1 in the glue viscosity control device 2 of the first embodiment of the present invention shown in FIG.
Based on the relationship between the indirect heat source 13, the PID operation, and the operation amount of hot water, the operation of each operation with respect to the difference between the viscosity and the target viscosity will be described.

First, in the portion A of FIG. 3, the manipulated variables of the indirect heat source 13 and the direct heat source 12 are held at their respective numerical values,
The temperature and viscosity of the paste solution 4 are controlled to target values, and the viscosity deviation is maintained at zero. That is, the supply glue liquid having a predetermined concentration is supplied in proportion to the amount of paste liquid consumed, and the evaporation of water and the supply of water vapor are in balance.

In the portion B of FIG. 3, when the viscosity of the glue liquid 4 becomes lower than the target value and a positive viscosity deviation occurs, the operation amount of the PID operation increases, and the signal C1 from the viscosity controller 15 causes the operation amount to increase. The operation amount of the indirect heat source 13 increases to promote the evaporation of the water content of the paste liquid 4, and conversely, the operation amount of the direct heat source 12 decreases to reduce the water content, until the viscosity deviation becomes zero. The operation amount is increased or decreased. The operation amount of the indirect heat source 13 at this time is determined by the temperature control system (temperature controller 1
4, acts on the operating device 16, the temperature detector 21, and the temperature setting device 22) as a disturbance.

In the portion C in FIG. 3, each heat source 1 in the portion B is used.
By keeping the final values of the manipulated variables of 2, 13 and PID operation, the temperature and viscosity of the paste liquid 4 are kept at the target values and the viscosity deviation is maintained at zero.

In the portion D of FIG. 3, when the viscosity of the glue liquid 4 becomes higher than the target value and a negative viscosity deviation occurs, the operation amount of the PID operation decreases, and the signal C1 accompanying it causes the operation of the indirect heat source 13. The amount of the heat source 1 also decreases to reduce the evaporation of water in the paste solution 4, and conversely, the amount of operation of the heat source 12 increases to increase the amount of replenishment of water, and each heat source 1 until the viscosity deviation becomes zero.
The operation amount of 2 and 13 is increased or decreased.

In the portions E and G of FIG. 3, the viscosity deviation is maintained at zero by holding the respective manipulated variables in the preceding portion at the final value of the operation in both portions.

In the F portion of FIG. 3, when the viscosity of the paste liquid 4 becomes higher than the target value due to the addition of a new paste liquid 4 ', etc., and a negative viscosity deviation occurs, the operation amount of the PID operation decreases, which accompanies it. The signal C1 causes the manipulated variable of the indirect heat source 13 to decrease and the manipulated variable of the direct heat source 12 to increase. When the operation amount of each of the direct heat source 12 and the indirect heat source 13 is continuously increased or decreased, the operation amount of the indirect heat source 13 becomes zero. From this point, the temperature and viscosity of the paste liquid 4 cannot be controlled to the target values by the direct heat source 12 and the indirect heat source 13. Therefore, if the manipulated variable of the PID operation of the viscosity controller 15 decreases from the appropriate set value N from that point, the manipulated variable of the hot water 41 gradually increases due to the signal C2 output accordingly.

In the portion H of FIG. 3, when the viscosity of the glue liquid 4 becomes lower than the target value and a positive viscosity deviation occurs, the manipulated variable of the PID operation increases to the set value N, and the signal C2 accompanying it increases the warm water 41. The manipulated variable of is reduced to zero. At this time, the manipulated variables of the direct heat source 12 and the indirect heat source 13 are G
The amount of each operation in the part is retained as it is. Next, when the operation amount of the PID operation becomes higher than the set value N, the operation amount of the indirect heat source 13 increases, and conversely, the operation amount of the direct heat source 12 decreases.

In the portion I of FIG. 3, the manipulated variable of the direct heat source 12 and the indirect heat source 13 maintains the final value in the portion H, so that the viscosity deviation is maintained at zero.

Further, the temperature controller 14 of the glue viscosity control device 2 of the second embodiment shown in FIG. 2 includes a temperature detector 21 for the glue liquid 4 and a target temperature setting device via a comparison point 19 on the input side. 22 and is connected to the PI based on the deviation between the target temperature and the PID operation based on the deviation between the detected temperature and the target temperature.
Under the D operation, a temperature control signal F proportional to the amount of heat required to keep the temperature of the glue liquid 4 at the target temperature is generated.

The temperature control signal F is a viscosity control signal C10 of a viscosity controller 15 which will be described later and is inputted to the distributor 30.
Is distributed to the direct heat source 12 and the indirect heat source 13, and the opening degree of the manipulator 16 and the manipulator 17 is controlled. Further, the viscosity controller 15 is connected to a viscosity detector 23 of the glue solution 4 and a viscosity setter 24 for setting a target viscosity via a comparison point 20 on the input side, and a deviation between the detected viscosity and the target viscosity. Based on the PID operation, viscosity control signals C10 and C2 are generated, the viscosity control signal C10 is output to the distributor 30, and the distributor 30 directly outputs the temperature control signal F to the heat source 1.
2 and the indirect heat source 13, and based on the distribution ratio,
For example, the opening degree of the electric operating device 16 and the operating device 17 is controlled. In this embodiment, the manipulated variable of the indirect heat source 13 does not become a disturbance of the temperature control system as in the first embodiment.

The signal C2 from the viscosity controller 15 is
As described in the part F of FIG. 3, when the viscosity of the glue liquid 4 exceeds the target value and a negative viscosity deviation occurs, the manipulated variable of the indirect heat source 13 is zero, that is, the opening is zero, and the control cannot be performed. At this time, it is a signal for lowering the viscosity, and by controlling the operation device 44 such as the proportional control valve of the hot water tank 40, the hot water 41 maintained at substantially the target temperature can be stored in the cavity box 3 as needed. Supply inside. In addition,
The temperature detector 21 of the above embodiment may be provided in the feed tank 11.

Next, as in the glue viscosity control device 2 of the third embodiment shown in FIG. 4, the temperature controller 14 of FIG.
2, the temperature controller 14 may control the indirect heat source 13 and the viscosity controller 15 may control the direct heat source 12 as opposed to the case where the viscosity controller 15 controls the indirect heat source 13. In this case, in order to notify the viscosity controller 15 that the operation amount of the indirect heat source 13 by the temperature controller 14 has become zero, the output signal F from the temperature controller 14 is sent to the viscosity controller 15.
It is good to let them input.

In the above embodiment, the case where the temperature control signal F and the viscosity control signals C1, C11, C2 are generated under the PID operation to operate the opening degree of the operating devices 16, 17 has been described. And in FIG. 4, the temperature controller 14
Alternatively, the viscosity controller 15 may be provided with a setting device for setting upper and lower control ranges with respect to the target value, and the operating device 16 of the direct heat source 12 and the operating device 17 of the indirect heat source 13 may be on / off controlled.

Needless to say, the viscosity control system of the glue viscosity control device 2 of the present invention may be replaced with a concentration control system including a concentration measuring device, a target concentration setting device and a concentration controller. .

As described in the above embodiments, the glue viscosity control device 2 of the present invention uses the direct heat source 12 and the indirect heat source 13 to maintain the temperature of the glue liquid 4 at the target temperature while Even though the viscosity is controlled to the target value, when the viscosity of the paste liquid 4 exceeds the control range and the viscosity becomes high, the viscosity controller 15 outputs a signal C2 and the signal C2 causes the operating device to operate. 44 is operated to supply the warm water 41 inside the warm water tank 40 to the paste solution 4 inside the cavity box 3 little by little or intermittently.

At the time of injecting the hot water 41, the temperature of the hot water 41 is controlled to be substantially equal to the temperature of the glue liquid 4, and the injection of the hot water 41 does not cause a temperature disturbance of the temperature control system. By the supply, the viscosity of the paste liquid 4 inside the cavity box 3 is quickly returned to the target value and approaches the target value. As a result, the control period is significantly shorter than the conventional one.

[0032]

According to the present invention, when the viscosity of the paste liquid exceeds the control range and becomes high, hot water is directly supplied into the paste liquid, so that the viscosity of the paste liquid can be quickly adjusted to a target value. Since the temperature of the hot water is controlled by the temperature control system to be almost equal to the temperature of the paste solution, sol / gelation does not occur at the hot water injection part of the paste solution during the injection process of the hot water, and the paste solution is partially There is no change in function, and the injection of hot water does not cause a thermal disturbance to the temperature control system of the glue solution, and the temperature control system is stabilized.

[Brief description of drawings]

FIG. 1 is a block diagram of a glue viscosity control device for a gluing machine according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a glue viscosity control device for a gluing machine according to a second embodiment of the present invention.

FIG. 3 is a graph of control characteristics.

FIG. 4 is a block diagram of another embodiment of the main part.

[Explanation of symbols]

 1 Gluing machine 2 Glue viscosity control device 3 Cavity box 4 Glue liquid 14 Temperature controller 15 Viscosity controller 40 Hot water tank 41 Hot water 44 Operator 49 Heat source 52 Temperature controller

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[Procedure amendment]

[Submission date] July 22, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of the invention: Adhesive viscosity control device for gluing machine

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the viscosity of a sizing liquid of a sizing machine.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 2-191736 discloses a technique for controlling the viscosity of a paste liquid, which uses a temperature control system and a viscosity control system for the paste liquid in a cavity box to contain a large amount of water. A technique for controlling the temperature and viscosity of the paste liquid to a target value by heating and cooling the paste liquid with a direct heat source such as water vapor or an indirect heat source such as an electric heater having no moisture is disclosed. .

In the control system, since the temperature of the sizing liquid is generally maintained at about 90 degrees Celsius, the water is constantly vigorously evaporated from the surface of the sizing liquid and the sizing liquid adheres to the running yarn. , The paste solution in the cavity box is consumed, and when adding the paste solution corresponding to the increase in viscosity due to the evaporation of water and the amount of paste solution consumed, the paste solution with high concentration is used. When was added, the viscosity was high, and in correcting it, more water vapor contained in the heat source was made to act, and the water content of the water vapor was injected into the glue solution. . However, in this process, the temperature of the paste solution rises too much, so the viscosity of the paste solution must be reduced by cooling the paste solution in the cavity box with a cooler.

[0004]

It is an object of the present invention to improve the response of the control of the paste viscosity, and not to adversely affect the temperature control system in the control process, and to quickly return the viscosity of the paste liquid to the target value with an inexpensive device. To do so.

[0005]

Based on the above-mentioned object, the applicant of the present invention, in a temperature / viscosity control system, when the viscosity of a paste solution exceeds a control range and becomes high, and becomes hard, By injecting an appropriate amount of water, it was attempted to return the viscosity of the paste solution to the lower direction. However, in the process of injecting water, when the temperature of the water is much lower than the temperature of the paste solution , the paste solution may turn into an emulsion sol or gel into a jelly, and the performance of the paste solution itself may change. Do you get it. Here, the temperature of the injected water is
Most preferably, it is a liquid temperature. The performance of the glue changes
The minimum temperature to avoid it depends on the prescription of the paste,
At least 40 ° C or higher is required.

Therefore, as a means of solving the present invention, the applicant of the present invention has previously set the temperature of water to be injected to 40 ° when injecting an appropriate amount of water into the paste solution and returning the viscosity of the paste solution to the lower direction . Below C
By controlling the temperature to the appropriate value above and injecting the hot water into the paste solution, partial sol / gelation of the paste solution is prevented in advance, and the paste can be prepared in a short time and with an inexpensive device. The viscosity of the liquid can be returned to the target value. Should be injected again
Maintaining a constant water temperature helps control the temperature of the paste solution.
There is less turbulence. In other words, the disturbance is the water injection amount.
Is absorbed in PID control because it is proportional to
Stabilize. Alternatively, pour water at a temperature almost equal to the paste temperature.
When watering, it is not a disturbance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment will be described in detail with reference to FIG. 1 as to the constructions of a gluing machine 1 and a glue viscosity control device 2 of the present invention. The gluing machine 1 stores the gluing liquid 4 inside the cavity box 3, and the gluing liquid 4 is pumped by the pump 5.
Excessive supply to the inside of the sizing box 6 causes it to overflow, so that the sizing box 6 is circulated back to the inside of the cavity box 3.

On the other hand, the yarn sheet 7 is guided by the guide roller 8, dipped in the sizing liquid 4 inside the sizing box 6 by the sizing roller 9, and is squeezed by the two squeezing rollers 10. As the sizing liquid 4 is consumed in the sizing box 6, a sizing liquid 4 ′ having a predetermined concentration and a temperature substantially the same as that of the sizing liquid 4 is supplied from the feed tank 11 by the operation valve 31. Will be replenished.

As shown in FIG. 1, the glue viscosity control device 2 of the present invention comprises a heat source, a control portion and a hot water supply portion. As the heat source, a direct heat source 12 and an indirect heat source 13 are used. In order to control these two heat sources,
A temperature controller 14 and a viscosity controller 15 which constitute a control unit described later are provided.

The direct heat source 12 is water vapor, which is directly injected into the paste solution 4 in the cavity box 3 through the operation device 16 such as an electric valve and the piping to heat the paste solution 4 and at the same time, to heat it. Rehydrate. In addition, indirect heat source 1
Reference numeral 3 is a heat source such as electricity or steam, and indirectly heats the paste liquid 4 in the cavity box 3 by a heat exchanger 18 via an operating device 17 such as an electric valve or a switch and a power supply path or piping. Let it work.

The control section is composed of a temperature controller 14 and a viscosity controller 15. This temperature controller 14
Is the cavity box 3 via the comparison point 19 on the input side.
Is connected to a temperature detector 21 and a temperature setter 22 for setting a target temperature, which is provided with a PID controller and an amplifier inside thereof, and a PID operation is performed based on a deviation between the detected temperature and the target temperature. , Generates a signal F for temperature control that directly controls the opening degree of an operating device 16 such as an electric valve of the heat source 12.

Further, the viscosity controller 15 is connected to a viscosity detector 23 for the paste 4 and a viscosity setter 24 for setting a target viscosity via a comparison point 20 on the input side, and a PID controller and an amplifier are provided therein. Based on the deviation between the detected viscosity and the target viscosity, a signal C1 for controlling the opening degree of the electric operating device 17 of the indirect heat source 13 and the detected viscosity exceed the target viscosity under the PID operation. When the indirect heat source 13 is stopped, a signal C2 for controlling the supply amount of hot water from the hot water tank 40 described later is generated.

The hot water supply section is composed of a hot water tank 40 and a hot water controller 52. The hot water tank 40 is provided near the cavity box 3 in order to supply the hot water 41 to the glue solution 4. In addition, the warm water 41 is supplied from the outside by a manipulator 42 to a warm water inlet 43.
Is supplied to the hot water tank 40 as needed, and then the controller 44 is controlled by the signal C2 from the viscosity controller 15 to control the operation box 44 from the hot water outlet to the cavity box 3.
Is replenished inside. Here, as the hot water 41 supplied from the outside, hot water directly supplied from a dedicated boiler or hot water used in the vicinity of the gluing machine 1 or steam condensate supplied to a drying cylinder and a drying device is used. I shall.

Further, the temperature controller 52 includes a temperature detector 4 inside the hot water tank 40 via a comparison point 51 on the input side.
7 and the temperature setter 50 for setting the target temperature,
An amplifier is provided inside it and generates a signal I for controlling the temperature based on the temperature deviation. The heat source 49 is applied to the hot water 41 in the hot water tank 40 by controlling the on / off of the operating device 48 by the signal I. Here, the heat source 49 is steam or an electric heater in this embodiment. Therefore, the operating device 48 is configured as an on / off valve for water vapor or an on / off switch for electricity.

Next, the above viscosity deviation and the direct heat source 1 in the glue viscosity control device 2 of the first embodiment of the present invention shown in FIG.
Based on the relationship between the indirect heat source 13, the PID operation, and the operation amount of hot water, the operation of each operation with respect to the difference between the viscosity and the target viscosity will be described.

First, in the portion A of FIG. 3, the manipulated variables of the indirect heat source 13 and the direct heat source 12 are held at their respective numerical values,
The temperature and viscosity of the paste solution 4 are controlled to target values, and the viscosity deviation is maintained at zero. That is, the supply glue liquid having a predetermined concentration is supplied in proportion to the amount of paste liquid consumed, and the evaporation of water and the supply of water vapor are in balance.

In the portion B of FIG. 3, when the viscosity of the glue liquid 4 becomes lower than the target value and a positive viscosity deviation occurs, the operation amount of the PID operation increases, and the signal C1 from the viscosity controller 15 causes the operation amount to increase. The operation amount of the indirect heat source 13 increases to promote the evaporation of the water content of the paste liquid 4, and conversely, the operation amount of the direct heat source 12 decreases to reduce the water content, until the viscosity deviation becomes zero. The operation amount is increased or decreased. The operation amount of the indirect heat source 13 at this time is determined by the temperature control system (temperature controller 1
4, acts on the operating device 16, the temperature detector 21, and the temperature setting device 22) as a disturbance.

In the portion C in FIG. 3, each heat source 1 in the portion B is used.
By keeping the final values of the manipulated variables of 2, 13 and PID operation, the temperature and viscosity of the paste liquid 4 are kept at the target values and the viscosity deviation is maintained at zero.

In the portion D of FIG. 3, when the viscosity of the glue liquid 4 becomes higher than the target value and a negative viscosity deviation occurs, the operation amount of the PID operation decreases, and the signal C1 accompanying it causes the operation of the indirect heat source 13. The amount of the heat source 1 also decreases to reduce the evaporation of water in the paste solution 4, and conversely, the amount of operation of the heat source 12 increases to increase the amount of replenishment of water, and each heat source 1 until the viscosity deviation becomes zero.
The operation amount of 2 and 13 is increased or decreased.

In the portions E and G of FIG. 3, the viscosity deviation is maintained at zero by holding the respective manipulated variables in the preceding portion at the final value of the operation in both portions.

In the F portion of FIG. 3, when the viscosity of the paste liquid 4 becomes higher than the target value due to the addition of a new paste liquid 4 ', etc., and a negative viscosity deviation occurs, the operation amount of the PID operation decreases, which accompanies it. The signal C1 causes the manipulated variable of the indirect heat source 13 to decrease and the manipulated variable of the direct heat source 12 to increase. When the operation amount of each of the direct heat source 12 and the indirect heat source 13 is continuously increased or decreased, the operation amount of the indirect heat source 13 becomes zero. From this point, the temperature and viscosity of the paste liquid 4 cannot be controlled to the target values by the direct heat source 12 and the indirect heat source 13. Therefore, if the manipulated variable of the PID operation of the viscosity controller 15 decreases from the appropriate set value N from that point, the manipulated variable of the hot water 41 gradually increases due to the signal C2 output accordingly.

In the portion H of FIG. 3, when the viscosity of the glue liquid 4 becomes lower than the target value and a positive viscosity deviation occurs, the manipulated variable of the PID operation increases to the set value N, and the signal C2 accompanying it increases the warm water 41. The manipulated variable of is reduced to zero. At this time, the manipulated variables of the direct heat source 12 and the indirect heat source 13 are G
The amount of each operation in the part is retained as it is. Next, when the operation amount of the PID operation becomes higher than the set value N, the operation amount of the indirect heat source 13 increases, and conversely, the operation amount of the direct heat source 12 decreases.

In the portion I of FIG. 3, the manipulated variable of the direct heat source 12 and the indirect heat source 13 maintains the final value in the portion H, so that the viscosity deviation is maintained at zero.

Further, the temperature controller 14 of the glue viscosity control device 2 of the second embodiment shown in FIG. 2 includes a temperature detector 21 for the glue liquid 4 and a target temperature setting device via a comparison point 19 on the input side. 22 and is connected to the PI based on the deviation between the target temperature and the PID operation based on the deviation between the detected temperature and the target temperature.
Under the D operation, a temperature control signal F proportional to the amount of heat required to keep the temperature of the glue liquid 4 at the target temperature is generated.

The temperature control signal F is a viscosity control signal C10 of a viscosity controller 15 which will be described later and is inputted to the distributor 30.
Is distributed to the direct heat source 12 and the indirect heat source 13, and the opening degree of the manipulator 16 and the manipulator 17 is controlled. Further, the viscosity controller 15 is connected to a viscosity detector 23 of the glue solution 4 and a viscosity setter 24 for setting a target viscosity via a comparison point 20 on the input side, and a deviation between the detected viscosity and the target viscosity. Based on the PID operation, viscosity control signals C10 and C2 are generated, the viscosity control signal C10 is output to the distributor 30, and the distributor 30 directly outputs the temperature control signal F to the heat source 1.
2 and the indirect heat source 13, and based on the distribution ratio,
For example, the opening degree of the electric operating device 16 and the operating device 17 is controlled. In this embodiment, the manipulated variable of the indirect heat source 13 does not become a disturbance of the temperature control system as in the first embodiment.

The signal C2 from the viscosity controller 15 is
As described in the part F of FIG. 3, when the viscosity of the glue liquid 4 exceeds the target value and a negative viscosity deviation occurs, the manipulated variable of the indirect heat source 13 is zero, that is, the opening is zero, and the control cannot be performed. At this time, it is a signal for lowering the viscosity, and by controlling the operation device 44 such as the proportional control valve of the hot water tank 40, the hot water 41 maintained at substantially the target temperature can be stored in the cavity box 3 as needed. Supply inside. In addition,
The temperature detector 21 of the above embodiment may be provided in the feed tank 11.

Next, as in the glue viscosity control device 2 of the third embodiment shown in FIG. 4, the temperature controller 14 of FIG.
2, the temperature controller 14 may control the indirect heat source 13 and the viscosity controller 15 may control the direct heat source 12 as opposed to the case where the viscosity controller 15 controls the indirect heat source 13. In this case, in order to notify the viscosity controller 15 that the operation amount of the indirect heat source 13 by the temperature controller 14 has become zero, the output signal F from the temperature controller 14 is sent to the viscosity controller 15.
It is good to let them input.

In the above embodiment, the case where the temperature control signal F and the viscosity control signals C1, C11, C2 are generated under the PID operation to operate the opening degree of the operating devices 16, 17 has been described. And in FIG. 4, the temperature controller 14
Alternatively, the viscosity controller 15 may be provided with a setting device for setting upper and lower control ranges with respect to the target value, and the operating device 16 of the direct heat source 12 and the operating device 17 of the indirect heat source 13 may be on / off controlled.

Needless to say, the viscosity control system of the glue viscosity control device 2 of the present invention may be replaced with a concentration control system including a concentration measuring device, a target concentration setting device and a concentration controller. .

As described in the above embodiments, the glue viscosity control device 2 of the present invention uses the direct heat source 12 and the indirect heat source 13 to maintain the temperature of the glue liquid 4 at the target temperature while Even though the viscosity is controlled to the target value, when the viscosity of the paste liquid 4 exceeds the control range and the viscosity becomes high, the viscosity controller 15 outputs a signal C2 and the signal C2 causes the operating device to operate. 44 is operated to supply the warm water 41 inside the warm water tank 40 to the paste solution 4 inside the cavity box 3 little by little or intermittently.

[0031] during the injection of the hot water 41, if my temperature of the hot water 41 is approximately equal and control the temperature of the size liquid 4, since the injection of the hot water 41 is not a temperature disturbance of the temperature control system, the hot water 41 The viscosity of the glue liquid 4 inside the cavity box 3 is quickly returned to the target value and approaches the target value. As a result, the control period is significantly shorter than the conventional one.

[0032]

According to the present invention, when the viscosity of the paste liquid exceeds the control range and becomes high, hot water is directly supplied into the paste liquid, so that the viscosity of the paste liquid can be quickly adjusted to a target value. The temperature of the hot water is controlled by the temperature control system to be almost equal to the temperature of the glue liquid , or the temperature of hot water injection is 40
If the temperature is above ° C and constant, sol / gelation does not occur in the hot water injection part of the paste solution during the hot water injection process, and there is no partial change in the function of the paste solution. The temperature control system is not thermally disturbed, and the temperature control system is stabilized.

[Brief description of drawings]

FIG. 1 is a block diagram of a glue viscosity control device for a gluing machine according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a glue viscosity control device for a gluing machine according to a second embodiment of the present invention.

FIG. 3 is a graph of control characteristics.

FIG. 4 is a block diagram of another embodiment of the main part.

[Explanation of Codes] 1 Gluing machine 2 Glue viscosity control device 3 Cavity box 4 Glue liquid 14 Temperature controller 15 Viscosity controller 40 Hot water tank 41 Hot water 44 Operator 49 Heat source 52 Temperature controller

[Procedure Amendment 2]

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[Figure 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

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[Fig. 2]

Claims (1)

[Claims] 1. A temperature controller for detecting the temperature of a paste liquid (4) in a cavity box (3) and controlling the heat quantity of a heat source (12, 13) so that the detected temperature matches a target temperature. (14), and a viscosity controller (15) for detecting the viscosity of the paste solution (4) and controlling the moisture content and heat quantity of the heat sources (12, 13) so that the detected viscosity matches the target viscosity. While maintaining the temperature of the paste solution (4) at the target temperature, the paste solution (4)
In a paste viscosity control device (1) for controlling the viscosity of a paste to a target viscosity, a hot water tank (40) for storing hot water (41) to be supplied to a paste liquid (4) in a cavity box (3) and a hot water tank (40) Hot water (41) by detecting the temperature of the hot water (41) inside 40) and controlling the heat quantity of the heat source (49).
Temperature controller (52) for maintaining the temperature of the target temperature at the target temperature, and the viscosity of the paste liquid (4) exceeds the target viscosity, and the heat source (12,
When the viscosity control by 13) becomes impossible, the hot water (41) in the hot water tank (40) is fed into the cavity box (3) based on the viscosity control signal from the viscosity controller (15). An operating device (44) for injecting into the paste solution (4)
A paste viscosity control device (1) for a gluing machine, comprising: