JP6845201B2 - Hot press device and temperature control method for hot press device - Google Patents

Description

The present invention relates to a hot press apparatus provided with a plurality of hot plates whose temperature is controlled by a heat medium, and a temperature control method for the hot press apparatus.

Conventionally, as a hot press apparatus provided with a plurality of hot plates whose temperature is controlled by a heat medium, those described in Patent Document 1 and Patent Document 2 are known. Patent Document 1 is a temperature control method of a hot press including a hot plate whose temperature is controlled by a heat medium and a pressing device for pressing a workpiece placed on the hot plate. Any two temperatures of the heat medium in the inlet manifold distributed / supplied to, the heat medium in the outlet manifold discharged / collected from each heat plate, and the heat plate are detected, and the two temperatures are detected. Is switched and selected according to the process of the temperature setting pattern, and feedback control is performed so that the selected temperature value matches the temperature setting pattern. Further, Patent Document 2 has a temperature sensor attached to a passage of a heat medium between a pump and a multi-stage press device.

Japanese Patent No. 3785352 (claim 1, FIG. 1) Japanese Patent Application Laid-Open No. 3-67480 (Claim 1, FIG. 1)

However, when controlling the temperature of the hot press heat medium supply device of the patent document, the temperature control of the heat plate of the press device is sensitive depending on the temperature of the heat medium inside the conduit connected from the heat medium supply device to the press device. Sometimes I couldn't do it. The problem was more remarkable when the heat medium supply device and the press device were separated from each other, the distance between the pipelines was long, and the amount of heat medium in the pipelines was large.

Therefore, in the present invention, in the temperature control method of the hot press device and the hot press device provided with a plurality of hot plates whose temperature is controlled by the heat medium, the hot press device or the hot press device having excellent responsiveness or stability during temperature control. It is an object of the present invention to provide a control method of a press device.

The hot press device according to claim 1 of the present invention is a hot press device including a plurality of hot plates whose temperature is controlled by a heat medium, and supplies the press device by distributing the heat medium to the hot plates. A side manifold and a discharge side manifold for collecting the heat medium discharged from the heat plate are provided, and the heat medium supply line of the heat medium supply device or the supply side line connected to the press device from the heat medium supply device. A temperature sensor that detects the temperature of the heat medium sent to the press device, a temperature sensor that detects the temperature of the hot plate of the press device or the temperature of the heat medium, a temperature sensor provided on the discharge side manifold of the press device, and the press. The temperature sensor provided on the supply side manifold of the apparatus and the detection value of each of the temperature sensors are used, and at least the heat medium supply conduit of the heat medium supply apparatus or the heat medium supply pipe connected to the press apparatus from the heat medium supply apparatus. step heating by weighting the detection value of the temperature sensor for detecting the temperature of the heat medium sent to the press apparatus of the road, heating and holding process, the control unit and is provided to control the temperature of the hot plate of the cooling step, heat The length of the heat medium supply line connected from the medium supply device to the press device is 5 m to 50 m, and when the heat medium supply line connected from the heat medium supply device to the press device is provided with a temperature sensor, the temperature sensor is provided. A temperature sensor is provided within one-fifth of the total length of the pipeline on the heat medium supply device side, and the heat medium supply device uses the heat medium oil as the heat medium and cools with the heated heat medium oil. It is characterized in that the heat medium oil that has been produced is merged to generate the heat medium oil that is supplied to the press apparatus .

Temperature control method of the hot press apparatus according to claim 2 of the present invention, heat in the temperature control method of the hot press apparatus having a plurality of heat plate is temperature controlled by a heating medium, the press apparatus to the hot plate A supply-side manifold for distributing and supplying the medium and a discharge-side manifold for collecting the heat medium discharged from the heat plate are provided, and the heat medium supply pipeline of the heat medium supply device or the heat medium supply device is connected to the press device. To the temperature sensor that detects the temperature of the heat medium sent to the press device of the pipeline on the supply side, the temperature sensor that detects the temperature of the hot plate of the press device or the temperature of the heat medium, and the discharge side manifold of the press device. It is provided with a provided temperature sensor, and is characterized in that the temperature sensor of the supply side manifold of the press device is eliminated or not used to control the temperature of the hot plate.

The hot press apparatus of the present invention is a hot press apparatus provided with a plurality of hot plates whose temperature is controlled by a heat medium. The press apparatus includes a supply side manifold and the hot plate for distributing and supplying the heat medium to the hot plates. A discharge side manifold for collecting the heat medium discharged from the heat medium is provided, and heat is sent from the heat medium supply line of the heat medium supply device or the heat transfer device of the supply side line connected to the press device from the heat medium supply device. On the temperature sensor that detects the temperature of the medium, the temperature sensor that detects the temperature of the hot plate of the press device or the temperature of the heat medium, the temperature sensor provided on the discharge side manifold of the press device, and the supply side manifold of the press device. Using the provided temperature sensor and the detection value of each of the temperature sensors, at least the heat medium supply line of the heat medium supply device or the heat medium supply line is sent from the heat medium supply device to the press device of the heat medium supply line connected to the press device. A control device that weights the detection value of the temperature sensor that detects the temperature of the heat medium to control the temperature of the hot plate in the temperature raising step, heating holding step, and temperature lowering step is provided, and the heat medium supply device to the press device are provided. The length of the heat medium supply line connected to is 5 m to 50 m, and when a temperature sensor is provided in the heat medium supply line connected from the heat medium supply device to the press device, the total length of the line is extended. On the other hand, a temperature sensor is provided within one-fifth of the heat medium supply device side, and the heat medium supply device uses the heat medium oil as the heat medium, and the heated heat medium oil and the cooled heat medium oil are used. Since the heat transfer oil that is merged and supplied to the press device is generated, it is excellent in responsiveness or stability during temperature control.

It is the schematic explanatory drawing of the hot press apparatus of this embodiment. It is a figure which showed the temperature control of the hot plate of the hot press apparatus of this embodiment. It is a figure which showed the setting screen of the control device of the hot press device of this embodiment.

A hot press device 11 including a plurality of hot plates 16 whose temperature is controlled by the heat medium of the present invention will be described with reference to FIG. The hot press device 11 includes a press device 12 and a heat medium supply device 13. In the present invention, the hot press device 11 refers to the entire system including the press device 12, the heat medium supply device 13, the control device 20 for operating them, and the like.

In the press device 12, a plurality of heat plates 16 which are heated portions are arranged between the upper fixed plate 14 and the lower movable plate 15. A ram 17a of a compression cylinder 17 operated by a hydraulic mechanism is fixed to the lower side of the lower movable plate 15, and the hot plate 16 fixed to the lower movable plate 15 can be raised and lowered by raising and lowering the ram 17a. It has become. Then, as the hot plate 16 is further raised, the intermediate hot plate 16 can also be raised toward the hot plate 16 fixed to the upper fixing plate 14. The press device 12 is housed in the chamber 18 and can be press-molded in a vacuum state, but may not have a chamber.

The hot plate 16 is a plate whose upper and lower surfaces are flat, and a heat medium passage through which heat medium oil is circulated is formed inside. A temperature sensor 19 (thermocouple) for detecting the temperature of the hot plate 16 is provided on the metal portion of the main body of each hot plate 16, and the temperature sensor 19 is connected to the control device 20. In FIG. 1, the temperature sensor 19 is described only on one hot plate 16 by omitting it, but the temperature sensor 19 is attached to all the hot plates 16. The number of hot plates 16 of the press device 12 is not limited as long as it is a plurality of hot plates 16, and the temperature sensor 19 may not be attached to all the hot plates 16. Alternatively, the temperature sensor 19 may be attached to both the metal portion of the main body of the hot plate 16 and the heat medium flow path, or only in the heat medium flow path.

Further, the press device 12 is provided with a supply side manifold 21 that distributes and supplies a heat medium to each hot plate 16 and a discharge side manifold 22 that collects the heat medium discharged from each hot plate 16. A pipe line 23 is connected between the supply side manifold 21 and each hot plate 16. Further, a pipeline 24 (supply side pipeline) connected to the press device 12 from the heat medium supply device 13 described later is connected to the supply side manifold 21. A temperature sensor 25 (thermocouple) for detecting the temperature of the heat medium is mounted inside the supply-side manifold 21, and the temperature sensor 25 is connected to the control device 20.

Further, a pipe line 26 is connected between the discharge side manifold 22 and each hot plate 16. Further, a pipe line 27 (discharge side pipe line) connected from the press device 12 to the heat medium supply device 13 is connected to the discharge side manifold 22. A temperature sensor 28 (thermocouple) for detecting the temperature of the heat medium is mounted inside the discharge side manifold 22, and the temperature sensor 28 is connected to the control device 20. In the present invention, the temperature detection on the press device 12 side is controlled by using the temperature sensor 19 on the hot plate 16 and the temperature sensor 28 on the discharge side manifold 22 without eliminating or using the temperature sensor 25 on the supply side manifold 21. You may go. Alternatively, the temperature detection on the press device 12 side is controlled by using only the temperature sensor 19 of the hot plate 16 without eliminating or using the temperature sensor 25 of the supply side manifold 21 and the temperature sensor 28 of the discharge side manifold 22. May be good.

Next, the outline of the heat medium supply device 13 will be described. The heat medium supply device 13 includes a boiler 29 (or a heating device using an electric heater) for heating the heat medium oil, and a cooler 30 for cooling the heat medium oil with cooling water. Further, the heat medium supply device 13 includes temperature control valves 31 and 32 (three-way valves) for controlling the distribution amount of the heat medium oil in order to control the temperature of the heat medium oil, and two pumps 33 and 34.

More specifically, the heat medium supply device 13 is provided with a temperature control valve 31 at an extension portion of the discharge side pipeline 27 connected to the heat medium supply device 13 from the press device 12, to the main pipeline 35 and the cooler 30. The amount of heat transfer oil supplied can be controlled. A circulation pipe 42 is connected to the boiler 29, and the circulation pipe 42 is provided with a circulation pump 33 and a temperature control valve 32. The temperature control valve 32 can control the supply amount of the heated heat transfer oil distributed from the circulation line 42 to the main line 35. On the downstream side of the main pipeline 35, the cooled heat transfer oil supplied from the cooler 30 and the heated heat medium oil supplied from the boiler 29 are merged. Then, during the temperature raising step and the heating holding step, the heat medium oil returned from the press device 12 and the heat medium oil supplied from the boiler 29 are mixed and sent to the next press device 12 in a temperature-controlled heat medium. Oil is produced. Further, in the temperature lowering step, the heat medium oil returned from the press device 12 and the heat medium oil supplied from the cooler 30 are mixed to generate a temperature-controlled heat medium oil to be sent to the next press device 12.

Therefore, in any step of the main pipeline 35, the portion where the temperature-controlled heat medium oil to be sent to the next press device 12 is sent to the heat medium supply of the temperature-controlled heat medium oil of the heat medium supply device 13. It is referred to as pipeline 36. The heat medium supply line 36 is provided with a supply pump 34 for sending the heat medium oil to the press device 12. In FIG. 1, the portion of the heat medium supply line 36 of the temperature-controlled heat medium oil is shown by two lines for easy understanding. In the present embodiment, the temperature sensor 37 (thermocouple) is provided in the portion of the heat medium supply line 36. The temperature sensor 37 detects the temperature of the temperature-controlled heat transfer oil sent to the press device 12 and controls the temperature of the hot plate 16. In this embodiment, the temperature sensor 37 is provided on the downstream side of the supply pump 34. However, the temperature sensor 37 may be provided in the heat medium supply line 36 on the upstream side of the supply pump 34.

The heat medium supply device 13 is further provided with an expansion tank for heat medium oil and the like, but the description thereof will be omitted here. Further, the heat medium supply device 13 is not limited to the above-mentioned form. For example, the arrangement form of the boiler 29, the cooler 30, and the temperature control valves 31 and 32 may be simpler than the above, and in that case, one temperature control valve may be used. Further, the temperature of the heat transfer oil may be controlled by providing a temperature control valve or a branch line in the heat medium supply line 36 ahead of the pump 34 for supplying the heat medium oil. However, in that case, it is necessary to provide the temperature sensor 37 on the downstream side of the temperature control valve or the like. Further, the temperature control valves 31 and 32 are not limited to the three-way valve, and may be a combination of a flow rate control valve and an on-off valve. Further, the heater for heating the heat medium may be one provided in the hot plate 16. In that case, the temperature of the heat medium oil supplied to the hot plate of the press device is finally adjusted on the side of the heat medium supply device provided with the cooler and the pump, and the temperature sensor is attached to the heat medium supply passage.

Further, the temperature sensor 37 may be provided not inside the heat medium supply device 13 but in the pipeline 24 connected from the heat medium supply device 13 to the press device 12. In this case, especially when the length of the pipeline 24 of the hot press device 11 is long, it is desirable to provide a temperature sensor in the vicinity of the heat medium supply device 13 (the portion of 24a shown by two lines in FIG. 1). More specifically, when the temperature sensor 37 is provided in the pipeline 24, as an example, the temperature of the heat medium supply device 13 to the hot press device 12 is within 1/5 of the total length of the pipeline 24 on the heat medium supply device 13 side. It is desirable to provide the sensor 37. This is because it is desirable to measure the heat transfer oil sent from the heat medium supply device 13 to the press device 12 before the passage of time or the temperature change as much as possible.

In the present embodiment, the press device 12 and the heat medium supply device 13 are separated from each other due to the layout, and the pipeline 24 (supply side pipeline) connected from the heat medium supply device 13 to the press device 12 is 5 m or more. It is the length of. The press device 12 and the heat medium supply device 13 may be installed in separate buildings, in which case the length of the pipeline may be 20 m or more. However, if the distance between the two is too large, the cost of piping work will increase and it will be disadvantageous in terms of thermal efficiency, so it is desirable to keep it within 50 m as an example. In that case, the pipe line 27 on the discharge side from the press device 12 to the heat medium supply device 13 also needs to have substantially the same length. Of these pipelines 24 and 27, it is desirable that at least the supply-side pipeline 24 is insulated by a heat insulating material.

Next, a control device 20 that controls the temperature of the hot plate 16 of the hot press device 11 will be described. In the present invention, the control device 20 includes a temperature sensor 37 that detects the temperature of the heat medium of the heat medium supply line 36 of the heat medium supply device 13 or the line 24 connected to the press device 12 from the heat medium supply device 13. The temperature of the hot plate 16 is controlled by using the detected values of the temperature sensors 19, 25, 28, 32 of the temperature sensors 19, 25, 28 that detect the temperature of the hot plate 16 of the press device 12 or the temperature of the heat medium. Is. Functionally, the control device 20 includes an input unit 38, an output unit 39, a calculation unit 40, a storage unit 41, and the like.

The input unit 38 of the control device 20 is a temperature sensor 37 that detects the temperature of the heat medium oil in the heat medium supply line 36 of the heat medium supply device 13, and the temperature of the heat medium oil in the supply side manifold 21 of the press device 12. Is connected to a temperature sensor 25 for detecting the temperature of the heat plate 16, a temperature sensor 19 for detecting the temperature of the hot plate 16, and a temperature sensor 28 for detecting the temperature of the heat transfer oil in the discharge side manifold 22. Further, the output unit 39 of the control device 20 is connected to the temperature control valves 31 and 32 of the heat medium supply device 13 to control the opening degree of the temperature control valves 31 and 32 (three-way valve). Further, the calculation unit 40 includes a CPU and the like, is connected to an input unit 38, an output unit 39, and a storage unit 41, and controls the temperature of the hot plate 16 by PID control described later. Further, the storage unit includes a memory and the like, and stores molding conditions, measured values, and the like accompanied by temperature control of the hot press device 11.

The control device 20 may be provided with one control device in either the press device 12 or the heat medium supply device 13, or may be provided independently of the devices 12 and 13. Further, the control device 20 may be provided in any of the press device 12, the heat medium supply device 13, and other places in a distributed manner, and the temperature of the hot press device 11 may be controlled as a whole.

Next, the temperature control method of the hot press device 11 of the present embodiment will be described. In the present invention, the final object to be controlled is the temperature of the hot plate 16 of the press device 12, but the object is sent out from the heat medium supply device 13 in order to control the temperature of the hot plate 16 to be a preset temperature. Control the temperature of the heat medium oil. More specifically, as described above, during the temperature raising step and the heating holding step, the heat medium oil returned from the press device 12 and the heat medium oil supplied from the boiler 29 are mixed and used in the next press device 12. A temperature-controlled heat transfer oil to be sent is produced. Then, the temperature of the temperature sensor 37 of the heat medium supply passage 36 sent to the press device 12 is detected, and the temperature rise control and temperature retention control of the hot plate 16 are weighted so as to have a preset temperature rise and temperature retention pattern. Used for. Further, in the temperature lowering step, the heat medium oil returned from the press device 12 and the heat medium oil supplied from the cooler 30 are mixed to generate a temperature-controlled heat medium oil to be sent to the next press device 12. Then, the temperature of the temperature sensor 37 of the heat medium supply passage 36 sent to the press device 12 is detected and used for temperature lowering control of the hot plate 16 so as to be weighted and have a preset temperature lowering pattern. However, the heat transfer oil from the cooler 30 may be added in the temperature raising step and the heat holding step in order to prevent overshoot, and the heat medium oil from the boiler 29 may be added in the same way in the temperature lowering step.

The molding time of one cycle including the temperature raising step, the holding step, and the temperature lowering step of the hot press device 11 varies depending on the molded product and is not limited, but may be several minutes to several hours as an example. The temperature control may be performed by changing the temperature in two or more steps in all of the temperature raising step, the heating holding step, and the temperature lowering step.

The temperature control of the hot press device 11 is generally performed by PID control. As an example is shown in Table 3, the temperatures detected by the four temperature sensors 19, 25, 28, and 37, respectively, are weighted to the optimum ratio for each process or temperature zone and used for control. .. Further, in each of the temperature raising step, the heating holding step, and the temperature lowering step,% of the set temperature of P control (proportional control), time (seconds) of I control (time integration control), and D control (differential control) for each temperature zone. ) Time (seconds) control constant is set to achieve both stability and responsiveness of the response. The PID control may be auto-tuned or corrected by auto-tuning.

In particular, as a characteristic of this embodiment, the length of the pipe line 24 connected from the heat medium supply device 13 to the press device 12 is long, and the capacity of the heat medium inside the line 24 is also large. Therefore, if only the temperature of the heat medium on the press device side is detected and the temperature control valve of the heat medium supply device is controlled as in Patent Document 1, the responsiveness is inferior. Therefore, as described as "heat medium supply device outlet (%)" in Table 3, the temperature of the heat medium oil on the downstream side of the pump 34 for supplying the heat medium supply device 13 is set to the detected value for temperature control. It is added. As described above, instead of the above, the heat transfer oil in the vicinity of the heat medium supply device 13 of the pipeline 24 connected to the press device 12 may be detected and controlled.

As a result, as in Patent Document 1, only the temperature of the heat plate of the press device or the temperature of the heat transfer oil in the supply side manifold and the discharge side manifold is detected, and the temperature control valve (three-way valve) of the heat medium supply device is formed. In the present invention, it is possible to reduce the control delay that has conventionally occurred and the hunting of the hot plate temperature that accompanies it, as compared with the case where the control is performed. This leads to improvement such as reduction of hunting even when the length of the pipe line 24 connected from the heat medium supply device 13 to the press device 12 is short, but further when the length of the pipe line 24 is long. It leads to a big improvement.

Further, when the length of the pipeline 24 connected from the heat medium supply device 13 to the press device 12 is not so long, the time required for the heat medium oil to be sent to the hot plate 16 and the temperature drop are both small. In that case, the temperature sensor 25 of the supply side manifold block is abolished, or the temperature sensor 25 is provided but not used, and the temperature on the side of the press device 12 is the temperature detected by the temperature sensor 19 of the hot plate 16. Control may be performed using the temperature detected by the temperature sensor 28 of the discharge side manifold 22. Alternatively, for the press device 12, only the temperature sensor 19 that detects the temperature of the hot plate 16 may be used for control, but in that case, the temperatures of both the inlet side and the outlet side of the heat medium passage of the hot plate 16 are measured. Is even more desirable.

Next, the molding of the hot press device 11 will be briefly described. First, the lower movable plate 15 is in the lowered position, the space between the hot plates 16 is open, and the door of the chamber 18 is also open. It is placed on top of 16. Next, the door of the chamber 18 is closed, the compression cylinder 17 is operated, the lower movable plate 15 and each hot plate 16 are raised, and the mold is closed. The timing of raising the temperature of the hot plate 16 is not limited, but usually the pump is operated after the mold is closed, or the heat medium oil that has been circulated by the constant pump operation is started to be supplied to the press device 12.

In the present embodiment, the supply amount (flow velocity) of the heat medium oil sent from the pump of the heat medium supply device 13 to the press device 12 per unit time is constant in all of the temperature raising step, the heating holding step, and the temperature lowering step. However, the supply amount of the heat transfer oil may be increased only at the time of temperature rise or high temperature. Alternatively, in the heat holding step, the supply amount of the heat transfer oil may be reduced from the middle to the latter half where the temperature of the molded product matches the temperature of the hot plate 16. When the supply amount of these heat medium oils is variable, the time for the heat medium oil to pass through the pipeline 24 is longer when the supply amount is small than when the supply amount is large. Therefore, when the supply amount of the heat medium oil is small, it is considered that the followability is deteriorated if the weight of the control using the detected values of the temperature sensors 19, 25, 28 in the press device 12 is increased, and the heat It is preferable to increase the weight of the control using the detected value of the temperature sensor 37 in the medium supply device 13.

Then, the temperature control valve 32 is controlled by detecting the temperatures of the temperature sensors 19, 25, 28, and 37 so that the temperature of the heat plate 16 matches the set temperature shown in FIG. 2, and the heat medium supply device 13 The heat medium oil is supplied from the heat medium to the heat plate 16 of the press device 12. The weighting of the PID control constant and the detected value at that time is as shown in FIG. 3 as described above. Then, as the temperature of the hot plate 16 rises, the pressure of the compression cylinder 17 is increased, and when the heating holding step and the temperature lowering step are completed, the supply of the heat medium oil from the heat medium supply device 13 to the press device 12 is stopped. Then, the compression cylinder 17 is operated again, and the lower movable plate 15 and each hot plate 16 are lowered to open the mold. After that, the door of the chamber 18 is opened and the molded product is taken out.

Although the present invention is not listed one by one, it is not limited to the above-described embodiment of the present invention, and a combination of the descriptions of the embodiments and a modification made by a person skilled in the art based on the gist of the present invention may also be used. It goes without saying that it applies. Similarly, when the heat medium is steam or water, control is performed using the heat medium supply line 36 of the heat medium supply device 13 or the temperature sensor 37 of the line 24 connected from the heat medium supply device 13 to the press device 12. Is desirable. When steam is used, the present invention also includes a device that detects the vapor pressure using a pressure sensor and converts it into temperature as an equivalent of the temperature sensor.

11 Hot press equipment
12 Press device 13 Heat medium supply device 16 Heat plate 19, 25, 28, 37 Temperature sensor 20 Control device 21 Supply side manifold 22 Discharge side manifold 23, 24, 24a, 26, 27 Pipeline 31, 32 Temperature control valve 33, 34 Pump 36 Heat medium supply line

Claims (2)

In a hot press device equipped with a plurality of hot plates whose temperature is controlled by a heat medium,
The press device is provided with a supply-side manifold that distributes and supplies the heat medium to the hot plate and a discharge-side manifold that collects the heat medium discharged from the hot plate.
A temperature sensor that detects the temperature of the heat medium sent from the heat medium supply line of the heat medium supply device or the press device of the supply side line connected to the press device from the heat medium supply device, and
A temperature sensor that detects the temperature of the hot plate of the press device or the temperature of the heat medium,
The temperature sensor provided on the discharge side manifold of the press device and
The temperature sensor provided on the supply side manifold of the press device and
Using the detection values of each of the temperature sensors, at least the temperature of the heat medium sent from the heat medium supply line of the heat medium supply device or the heat medium supply line connected to the press device to the press device is detected. It is equipped with a control device that weights the detected value of the temperature sensor to control the temperature of the hot plate in the temperature raising step, heating holding step, and temperature lowering step.
The length of the heat medium supply line connected from the heat medium supply device to the press device is 5 m to 50 m.
When a temperature sensor is provided in the heat medium supply line connected from the heat medium supply device to the press device, the temperature sensor is located within one-fifth of the total length of the line on the heat medium supply device side. Provided,
The heat medium supply device uses heat medium oil as a heat medium, and is characterized in that the heat medium oil supplied to the press device is generated by merging the heated heat medium oil and the cooled heat medium oil. Hot press equipment. In the temperature control method of a hot press device provided with a plurality of hot plates whose temperature is controlled by a heat medium,
The press device is provided with a supply-side manifold that distributes and supplies the heat medium to the hot plate and a discharge-side manifold that collects the heat medium discharged from the hot plate.
A temperature sensor that detects the temperature of the heat medium sent from the heat medium supply line of the heat medium supply device or the press device of the supply side line connected to the press device from the heat medium supply device, and
A temperature sensor that detects the temperature of the hot plate of the press device or the temperature of the heat medium,
It is equipped with a temperature sensor provided on the discharge side manifold of the press device.
A method for controlling the temperature of a hot press device, which controls the temperature of a hot plate without eliminating or using the temperature sensor of the supply side manifold of the press device.