JP5105704B2 - Heating / cooling system and heating / cooling method for heat press or heating / cooling mold - Google Patents

Description

  The present invention relates to a heating / cooling system and heating / cooling method for a hot press or heating / cooling mold.

  Conventionally, when molding the prism of a liquid crystal back panel light guide plate, the signal part of a disk, etc., the mold temperature is controlled when the molding surface of the mold is thermally transferred to the material (plastic plate) by the hot press molding method. It is essential.

The heating / cooling system for a hot press or heating / cooling die employs a method in which two types of media having different temperatures are flowed to the same die in accordance with the molding process in hot press molding. .
Specifically, the material (plastic plate) is carried into the mold, the mold is heated (heated up) to uniformly heat the mold, and the mold is lowered by the press mechanism. The molding surface is transferred to the material, and then the mold is cooled, and the mold is raised to carry out the molded material.

  By the way, in a conventional heating and cooling system for a heat press or heating and cooling mold, oil is used as a heating medium, oil is used as a cooling medium, or hot water is used as a heating medium and water is used as a cooling medium. The mold is heated and cooled with two types of media.

However, molds for hot pressing or heating / cooling require a large amount of thermal energy to increase the temperature, and in order to speed up the molding cycle, equipment costs and running costs are high, and the scale of the equipment also increases. It includes the problem of being impractical.
Moreover, when using a some metal mold | die, in order to give a temperature difference to these, the problem that the temperature control apparatus independent for each heating medium supplied to each metal mold | die is needed is included.

  In Patent Document 1, an injection molding machine, a temperature raising device, and a plurality of molds are used. After the plurality of molds are heated by the temperature raising device, the plurality of molds are sequentially injection molded. There has been proposed a molding method using a plurality of molds that are transferred to a machine and injection molded while individually controlling the temperature of each mold.

  However, in the case of the molding method disclosed in Patent Document 1, a complicated configuration and complicated control such as sequential transfer of a plurality of molds to an injection molding machine and individual temperature control of each mold are required. is doing.

  Japanese Patent Laid-Open No. 2004-228688 is configured to press and feed a medium from a plurality of temperature control devices to a plurality of main parts of the injection molding machine with respect to an injection molding machine having a fixed mold and a movable mold. There has been proposed a temperature control mechanism for a disc molding die.

However, in the case of the temperature control mechanism of Patent Document 2 as well, since the medium is pressure-fed from a plurality of temperature control devices to a plurality of main parts of the molding machine while controlling the temperature, a complicated configuration and a complicated control are also performed. Is included.
Japanese Patent Laid-Open No. 08-039642 JP 2003-31798 A

  The problem to be solved is that using a single temperature control device, steam is used for the heating medium and water is used for the cooling medium, and the heating and cooling of the mold can be easily switched in a short time. However, there is no heating / cooling system for a hot press or heating / cooling mold.

The present invention uses a medium having two different temperatures for steam as a heating medium for a plurality of molds and cooling water for a cooling medium, and supplies them to a mold medium path by a temperature control device. In a system that repeats the heating process of the mold, the molding of the molded product, and the cooling process of the mold, when a temperature difference is required between the upper plate and the lower plate of the mold pair, the heating medium path, for cooling A heating / cooling system for a hot press or heating / cooling mold in which the temperature difference is adjusted by switching the supply of steam and cooling water from the medium path to each mold, which is the heating medium. A heating unit that generates steam, supply and circulation of cooling water as the cooling medium, a cooling unit that includes a cooling tower, a plurality of temperature detectors disposed in the plurality of molds, and steam Multiple systems are supplied A plurality of switching valves that open and close by air pressure respectively connected to the branched medium paths; a heating medium path that supplies steam to the plurality of molds; cooling water is supplied from the cooling tower; and a plurality of systems A cooling medium path for supplying cooling water to the plurality of molds, an air source, an air filter, an air regulator, and an air accumulator. Air that supplies purge air to the plurality of molds, including a regulator tank, a control valve, a switching valve that opens and closes by air pressure, and a stop valve that is connected to each of the media paths branched into a plurality of systems at the subsequent stage of the switching valve A plurality of common medium paths each including a flow path, an outlet side of the heating medium path, a cooling medium path and an air flow path, and each of the plurality of molds; A switching valve that opens and closes by air pressure connected to a medium path that sends a medium flowing out of a plurality of medium paths from a mold to a discharge valve connected to a cooling tower through a discharge valve, and each of the cooling medium paths A switching valve that opens and closes by air pressure connected to a medium path branched before the switching valve, and a silent reducer that is connected to a medium path branched into a plurality of systems from the outlet of the switching valve and has a discharge side connected to the discharge valve; A medium path branched before the switching valve connected to the discharge medium path and connected to the silent reducer, and a discharge medium path for sending the cooling water to a cooling unit. The temperature of each mold is determined based on the temperature detected by each temperature detection unit, a plurality of switching valves for the heating medium path, a plurality of switching valves for the cooling medium path, an air flow A temperature adjusting device comprising a control means for controlling the switching valve of the path to perform the switching supply control of steam and cooling water to each mold and purging each mold, and controlling the molding operation in each mold; The purge air flow paths of the plurality of molds, when performing the air purge, the control means, a switching valve provided in the air flow path with a valve controller, a switching valve provided in the discharge medium path, and The switching valve provided in the front stage of the cooling medium path is controlled to be in an open state, and the switching valves provided in the heating medium path and a plurality of switching valves provided in the cooling medium path are controlled to be closed. Therefore, the air from the air source passes through an air filter, an air regulator, an air accumulator tank, a control valve, a switching valve, a stop valve, a supply valve for each system of the common medium path, and each supply manifold provided in the mold. Each After purging the inside of the mold, these lead to mold, air which passes through the respective mold, the respective circulation manifold provided in each mold, returns to the temperature control device through the discharge valve, the discharge medium After passing through the path switching valve, the temperature determination program set in the control means is configured to mix with the cooling water circulated from the discharge valve to the cooling tower, the heating determination temperature of any mold in the mold, The temperature for cooling determination can be set, and further, any mold in the mold is grouped and a combination of temperature determination in the group is set. Enables start control of press slide descent and press hold time, and control of press slide rise and press hold time of the press section by program operation according to the cooling judgment temperature Using a single temperature control device, steam was used for the heating medium and water was used for the cooling medium so that the heating and cooling of the mold could be easily switched in a short time. The most important feature.

The present invention has the following effects.
According to the first aspect of the present invention, the temperature detection units are arranged in the plurality of molds, the temperature determination program is stored in the control means of the temperature control device, and the plurality of molds is based on the temperature detected by the temperature detection unit. Judging the temperature of the mold, heating medium from the heating unit to the plurality of molds through the heating medium path, that is, supply of steam, cooling from the cooling unit to the plurality of molds through the cooling medium path Medium, i.e., the cooling water supply switching supply control and the molding operation control in the plurality of molds are performed. In addition to the effect that water can be used as a cooling medium and switching between heating and cooling of a plurality of dies can be easily performed in a short time, a hot press for purging a plurality of dies or Heating and cooling molds for heating and cooling It is possible to provide a stem.

Further , according to the invention described in claim 2 , in addition to the effect of the invention described in claim 1, the molding operation control by the press slide descending after heating of each mold in each mold or after the press slide descending of each mold Therefore, it is possible to provide a heating / cooling system for a hot press or heating / cooling mold that can easily cope with different types of molding materials.

According to the third aspect of the present invention, the temperatures of the plurality of molds are detected by the temperature detection unit arranged in the mold, and the temperature detected by the temperature detection unit is determined by the temperature determination program stored in advance in the temperature control device. By switching and supplying the heating medium generated by the heating unit based on the determination result, that is, steam, the cooling medium from the cooling unit, that is, cooling water, to the plurality of molds, and performing the molding operation in the plurality of molds Using a single temperature control device, using steam as the heating medium and water as the cooling medium, switching between heating and cooling of the mold can be easily performed in a short time to obtain a plurality of molded products. In addition to the effect, it is possible to provide a heating / cooling method for a hot press or heating / cooling die capable of purging a plurality of dies .

Further, according to the invention described in claim 4 , in addition to the effect of the invention described in claim 3, the molding operation by pressing the press slide after each mold in each mold or after the press slide descending from each mold is performed. Since it includes a step of performing a molding operation by heating, it is possible to provide a heating and cooling method for a hot press or heating and cooling mold that can easily cope with different types of molding materials.

The present invention uses a single temperature control device, uses steam as a heating medium and water as a cooling medium, and can be used for hot presses that can be easily switched between heating and cooling of a mold in a short time. Alternatively, the purpose of providing a heating / cooling system for heating / cooling molds is to use two different temperature media of steam and cooling water as the heating media of a plurality of molds, and adjust the temperature of these. This is a system in which the device is switched to the mold medium path and supplied, and the heating process of the mold, the molding of the molded product, and the cooling process of the mold are repeated. When a difference is required, a hot press or heating / cooling mold that adjusts the temperature difference by switching the supply of steam and cooling water from the heating medium path and the cooling medium path to each mold. A heating / cooling system, wherein the heating medium is steam. The heating unit to be configured, the cooling water as the cooling medium to be supplied and circulated, the cooling unit including a cooling tower, the plurality of temperature detection units disposed in the plurality of molds, and steam are supplied. A heating medium path for supplying steam to the plurality of molds, and cooling water from the cooling tower. A cooling medium path for supplying cooling water to the plurality of molds, an air source, and an air filter. , An air regulator, an air accumulator tank, a control valve, a switching valve that opens and closes by air pressure, and a stop connected to each of the media paths branched into multiple systems at the subsequent stage of this switching valve An air flow path for supplying purge air to the plurality of molds, an outlet side of the heating medium path, a cooling medium path and the air flow path, and each of the plurality of molds. A plurality of common media paths including each connected supply valve, and a medium path that sends the media flowing out from the plurality of media paths from each mold into one system via a discharge valve and sends them to a discharge valve connected to a cooling tower. A switching valve that opens and closes with the connected air pressure, a switching valve that opens and closes with air pressure connected to the medium path branched before each switching valve of the cooling medium path, and a branch from the outlet of the switching valve to a plurality of systems A silent reducer connected to the medium path and having a discharge side connected to the discharge valve, and a medium path branched before the switching valve connected to the discharge medium path and connected to the silent reducer, and the cooling Unit for cooling water And a discharge medium path to be sent to the gas, and a temperature determination program is stored, the temperature of each mold is determined based on the temperature detected by each temperature detection unit, and a plurality of switching valves for the heating medium path, Controls a plurality of switching valves for the cooling medium path and a switching valve for the air flow path to perform switching supply control of steam and cooling water to each mold and purge each mold, and each mold in each mold And a temperature control device having a control means for performing molding operation control by lowering the press slide after heating or controlling molding operation by heating after lowering the press slide of each mold, and for purging the plurality of molds When air purge is performed, the air flow path includes the control means, a switching valve provided in the air flow path with a valve controller, a switching valve provided in the discharge medium path, and a switching valve provided in front of the cooling medium path. Control to open state By controlling each switching valve provided in the heating medium path and a plurality of switching valves provided in the cooling medium path in a closed state, the air from the air source is supplied with an air filter, an air regulator, and an air accumulator. After purging the respective molds through the supply tanks of the system tank, control valve, switching valve, stop valve, common medium path, supply manifolds provided in the molds, The air that has passed through each mold is returned to the temperature control device via each circulation manifold and each discharge valve provided in each mold, and the switching valve for the discharge medium path is turned on. after passing through, configured to mix a coolant circulating to the cooling tower from the discharge valve, the temperature determining program to be set in the control unit, the heating determination temperature of any of the mold in the mold, the cooling-format The temperature can be set, and any molds in the mold can be grouped to set a combination of temperature judgments in the group. Can be controlled and the press holding time can be controlled by the program operation according to the cooling judgment temperature, and the heating medium can be controlled by using one temperature control device. In addition, it was realized by using water as the cooling medium and cooling medium so that the heating and cooling of the mold can be easily switched in a short time.

Examples of the present invention will be described in detail below.
The heating and cooling system of the hot press molding die (hereinafter referred to as “die”) according to the present embodiment uses two different temperature media of steam and cooling water as the heating medium, and these. Is switched to the medium path of the mold by the temperature control device 10, and the heating process of the mold, the molding of the molded product, and the cooling process are repeated.

  The mold heating / cooling system according to the present embodiment includes four molds, that is, molds 1 to 4, and molds 1 to 4 are paired by two plates, and an upper plate and a lower plate. When a temperature difference is required, the supply of steam and cooling water from the heating medium path and the cooling medium path to the molds 1 to 4 is switched to adjust the temperature difference.

The mold heating / cooling system according to the present embodiment will be described in detail below.
As shown in FIGS. 1 and 2, the mold heating / cooling system according to the present embodiment is composed of steam and a cooling medium which are heating media for the four molds 1 to 4 for molding a material. It has a temperature control device 10 that performs switching supply of certain cooling water, a heating unit 30 that sends steam to the temperature control device 10, and a cooling unit 40 that sends cooling water.

  As shown in FIG. 2, the heating unit 30 converts raw water into soft water by a water softener 31, injects a medicine such as an antiseptic by a chemical injection device 32, supplies the raw water to a boiler 33, and steam (for example, 170 [deg.] C. steam) is supplied from the discharge valve 34 to the temperature control device 10.

  In addition, the cooling unit 40 guides the cooling water supplied to the cooling water supply port to the cooling tower 41, sends the cooling water heat-exchanged in the cooling tower 41 to the temperature adjustment device 10 by the pump 42, and adjusts the temperature. The cooling water returned from the apparatus 10 is sprinkled from the upper part of the cooling tower 41 to the inside to exchange heat.

  The temperature control device 10 includes a heating medium path 11, a cooling medium path 12, an air flow path 13, a common medium path 14 for supplying steam, cooling water, and air to the molds 1 to 4. , A discharge medium passage 15 for discharging the circulating water (or steam) from the molds 1 to 4 toward the cooling unit 40 is provided.

  The heating medium path 11 includes an inlet steam valve 16 to which steam from the heating unit 30 is supplied, and four pressure reducing valves R1 to R4 connected to medium paths branched from the inlet steam valve 16 into four systems. And four switching valves D1 to D4 that open and close with air pressure, and four flow control valves H1 to H4.

  The cooling medium path 12 includes an inlet cooling water valve 17 to which cooling water is supplied from the cooling tower 41, a Y-type strainer 18 connected to a subsequent stage of the inlet cooling water valve 17, a pump 19, and a discharge side of the pump 19. There are four switching valves A1 to A4 that open and close by air pressure, and flow control valves E1 to E4 that are connected to medium paths branched into four systems. A pressure switch 20 is connected to the front stage of the pump 19 and a pressure gauge 21 is connected to the rear stage.

  The air flow path 13 includes an air source 22, an air filter 23, an air regulator 24, an air accumulator tank 29, a control valve 26, a switching valve M that opens and closes by air pressure, and a discharge side of the switching valve M. The four stop valves 27a to 27d are respectively connected to the medium paths branched into four systems.

  The four outlets of the heating medium path 11, the cooling medium path 12, and the air flow path 13 are connected to the four common medium paths 14, respectively.

  The discharge medium path 15 is opened and closed by air pressure connected to a medium path that collects four lines of circulating water (or steam) from the molds 1 to 4 and sends them to the discharge valve 28 connected to the cooling tower 41. A switching valve B for switching, a switching valve C for opening and closing by air pressure connected to a medium path branched downstream of the pump 19 of the cooling medium path 12, and a medium path branched from the switching valve C into two systems. Silent reducers SR1 and SR2 having discharge valves 28 on the discharge side, and control valves S1 and S2 connected to two medium paths branched before the switching valve B and connected to the silent reducers SR1 and SR2. is doing. In FIG. 1, K is a temperature sensor (for medium temperature monitoring).

  The four molds 1 to 4 have supply manifolds 1a to 4a and circulation manifolds 1b to 4b, respectively. The molds 1 to 4 are provided with temperature sensors 5a to 5d for detecting the internal temperature, respectively.

  Further, steam, cooling water, or air is supplied from the common medium path 14 to the four molds 1 to 4 through the four supply valves 6a to 6d, and the four molds. The steam, cooling water or air that has passed through the mold 1 to the mold 4 is discharged to the discharge medium path 15 through the four discharge valves 7a to 7d.

  The four molds 1 to 4 are provided with a press part 8 from the time when the molds 1 to 4 as shown in FIG. 5 of the press slide provided in the press part 8 rise to a certain temperature. The plate is moved by the lowering operation to perform the molding process, and the molded product (product) is taken out (taken out) after the ascending operation as shown in FIG.

  The valve controller 25 supplies the switching valves A1 to A4, the switching valves D1 to D4, the switching valve B, the switching valve C, and the switching valve M with signals for opening / closing operations.

  Next, a control system of the temperature adjusting device 10 in the mold heating and cooling system according to the present embodiment will be described with reference to FIG.

  The temperature adjusting device 10 takes in the detection signals of the temperature sensors 5a to 5d, controls the operation of the valve controller 25 by a program operation based on a preset temperature determination program, and also controls the molds 1 to 4 Control means 50 for sending a control signal to the press section 8 for controlling the operation of the press slide. The control means 50 and the valve controller 25 are housed in a control BOX as shown in FIG.

  Examples of the temperature determination program set in the control means 50 include setting of arbitrary heating determination temperatures and cooling determination temperatures of the molds 1 to 4 and temperature determination combination settings in the following groups. be able to.

  That is, the setting of the determination of T1 AND T2 or T1 OR T2 when the mold 1 and the mold 2 are group A, and the temperatures of the mold 1 and the mold 2 are T1 and T2, the mold 3 and the mold Examples include setting of determination of T3 AND T4 or T3 OR T4 when 4 is a B group and the temperature of the mold 3 and the mold 4 is T3 and T4.

  Further, in the A group and the B group, a combination of A AND B determination and A OR B determination can be set.

  Then, the press slide of the press section 8 is lowered and the press holding time is controlled by the program operation based on the heating determination temperature, or the press slide is raised and pressed by the program operation based on the cooling determination temperature. The holding time can be controlled.

  Next, the operation of the mold heating and cooling system according to the present embodiment is mainly performed by the mold temperature adjusting operation by the temperature adjusting device 10, and referring to FIG. 4 and FIG. This will be described separately during cooling and purging.

(Standby)
During standby, based on the control of the control means 50 and the valve controller 25, as shown in FIG. 4, only the switching valve C in the temperature control device 10 is opened, the switching valves A1 to A4, the switching valves D1 to D4, the switching valve B, The switching valve M is closed, and the cooling water from the cooling tower 41 is pumped by the pump 19, passes through the switching valve C, passes through the silent reducers SR1 and SR2, and further circulates from the discharge valve 28 to the cooling tower 41.

(When heating)
When the molds 1 to 4 are heated, the control means 50 and the valve controller 25 control the switching valves D1 to D4 and the switching valve C to the open state as shown in FIG. A4, the switching valve B and the switching valve M are controlled to be closed.

  As a result, the steam generated by the heating unit 30 is supplied from the inlet steam valve 16 of the temperature control device 10 to four systems of pressure reducing valves R1 to R4, switching valves D1 to D4, and flow rate control valves provided in the heating medium path 11. After passing through H1 to H4 and passing through the common medium path 14, the molds 1 to 4 are heated as shown in FIG. 5 through the supply valves 6a to 6d and the supply manifolds 1a to 4a.

  At this time, the steam supplied to the molds 1 to 4 is accumulated in the supply manifolds 1a to 4a immediately adjacent to the molds 1 to 4, and is supplied to the molds 1 to 4, thereby the respective molds 1 to 4 being accumulated. Temperature unevenness on the surfaces of the molds 1 to 4 is suppressed. In the four molds 1 to 4, when the molds 1 to 4 as shown in FIG. 5 of the press slide provided in the press unit 8 rise to a certain temperature based on the control by the control means 50. The plate is moved by the lowering operation from the plate to perform the forming process, and after the rising operation as shown in FIG. 5 of the press slide, the molded product (product) is carried out (taken out).

  The steam whose temperature has been lowered by heating the mold 1 to the mold 4 returns to the temperature control device 10 through the circulation manifolds 1b to 4b and the discharge valves 7a to 7d, and silently through the control valves S1 and S2 of the discharge medium passage 15. The steam is sent to the reducers SR1 and SR2, where the steam is replaced with water, and further sent to the cooling tower 41 via the discharge valve 28 (circulates).

  When the molds 1 to 4 are heated, the switching valves A1 to A4 are closed as described above, and the cooling water from the cooling tower 41 is pumped by the pump 19 and silently passes through the switching valve C. It passes through the reducers SR1 and SR2, and further circulates to the cooling tower 41 via the discharge valve 28.

(When cooling)
When the molds 1 to 4 are cooled, the switching means A1 to A4 and the switching valve B are controlled to be opened by the control means 50 and the valve controller 25, and the switching valves D1 to D4 and the switching valve C are controlled. The switching valve M is controlled to be closed.

  Thereby, the cooling water from the cooling tower 41 is pumped by the pump 19 through the inlet cooling water valve 17 and the Y-type strainer 18, passes through the switching valves A1 to A4 and the flow rate adjusting valves E1 to E4, and passes through the common medium path 14. Thereafter, the molds 1 to 4 are cooled through the supply valves 6a to 6d and the supply manifolds 1a to 4a as shown in FIG.

  Also in this case, the cooling water supplied to the molds 1 to 4 is accumulated in the supply manifolds 1a to 4a immediately adjacent to the molds 1 to 4, and is supplied to the molds 1 to 4, The temperature unevenness of the surfaces of the molds 1 to 4 is suppressed.

  Cooling water that has cooled the mold 1 through the mold 4 and has risen in temperature returns to the temperature control device 10 via the circulation manifolds 1b through 4b and the discharge valves 7a through 7d, and then the switching valve B of the discharge medium passage 15 and the discharge valve. 28 is sent to the cooling tower 41 (circulates).

(When purging)
When purging the molds 1 to 4, the control means 50 and the valve controller 25 control the switching valve B, the switching valve C, and the switching valve M to be open as shown in FIG. The valves A1 to A4 and the switching valves D1 to D4 are controlled to be closed.

  Thereby, the air from the air source 22 passes through the air filter 23, the air regulator 24, the air accumulator tank 29, the adjustment valve 26, the switching valve M, the four stop valves 27a to 27d, and further through the common medium path 14. After that, the supply valves 6a to 6d and the supply manifolds 1a to 4a are passed through the molds 1 to 4, and the inside of the molds 1 to 4 is purged.

The air that has passed through the mold 1 to the mold 4 returns to the temperature control device 10 through the circulation manifolds 1b to 4b and the discharge valves 7a to 7d, passes through the switching valve B of the discharge medium passage 15, and then in the standby state. Similarly, it is pumped by the pump 19, passes through the silent reducers SR <b> 1 and SR <b> 2 through the switching valve C, and is further mixed with cooling water circulated from the discharge valve 28 to the cooling tower 41.

  Here, a specific example of the apparatus size of the heating / cooling system will be considered. In the apparatus using oil or hot water as the heating medium as in the conventional example, the size of the heat medium generator is 1000 × depth in mm units. A 2100 × 2350 size 200 kW calorie is required, and if there are four molds, an installation area four times the size is required. Furthermore, this requires an installation area of the temperature control device (width 650 × depth 532 × height 500).

  However, by using steam as the heating medium as in this embodiment, the size of the heating unit 30 is configured to output heat energy of 940 kW in units of mm, width 1270 × depth 2100 × height 2200. It can be accommodated in a size obtained by adding a width 750 × depth 1500 × height 1850 in mm of the temperature control device, and space can be saved.

  Further, in the conventional example, in order to give a temperature difference to each of the plurality of molds, an independent device for each heating medium is necessary. However, according to the present embodiment, steam (170 4) can be easily supplied to the molds 1 to 4 simply by supplying the temperature control device 10 to the temperature control device 10. That is, the heating medium path 11 is provided with pressure reducing valves R1 to R4, switching valves D1 to D4 that open and close based on temperature determination, and flow rate adjusting valves H1 to H4. Can be supplied to molds 1 to 4. In addition, since the cooling medium path 12 is provided with switching valves A1 to A4 and flow control valves E1 to E4 that open and close based on temperature determination, cooling water having four temperatures is supplied to the dies 1 to 4 by these. Can be supplied.

  Further, according to the present embodiment, since the equipment cost is realistically about 80 kW, the temperature increase speed per plate in the molds 1 to 4 is also increased about three times.

  Furthermore, according to the present embodiment, since a large amount of steam can be supplied to the molds 1 to 4, it is possible to suppress temperature variations on the surface of the plate.

FIG. 6 shows another example of molding operation control in each of the molds 1 to 4, and the material is controlled based on the control by the control means 50 during the molding operation by the four molds 1 to 4. As shown in FIG. 6 of the press slide provided in the press section 8 immediately after being carried into the mold 1 to the mold 4, a lowering operation is performed, the mold 1 to the mold 4 is heated and molded, and further cooled. When the molds 1 to 4 are cooled to a certain temperature, the press slide is moved up as shown in FIG. 6 to carry out (take out) the molded product (product). .
By performing the molding operation control in the molds 1 to 4, it is possible to easily cope with the molding process of a different type of resin material from the case shown in FIG.

  The present invention can be widely applied to a molding system including a plurality of molds in addition to the above-described mold for hot pressing or heating / cooling.

It is the temperature control apparatus in the heating-cooling system of the metal mold | die for heating presses or heating-cooling which concerns on the Example of this invention, and piping structure of a metal mold | die. It is a piping lineblock diagram of the unit for heating concerning this example, and the unit for cooling. It is a schematic block diagram which shows the control system which concerns on a present Example. It is explanatory drawing which shows the opening-and-closing state of five types of switching valves at the time of a shaping | molding cycle by the heating-cooling system of the metal mold | die for heating presses or heating / cooling which concerns on a present Example. It is explanatory drawing which shows the metal mold temperature change in the heating, cooling, standby (or purge), and operation | movement of a press slide which concerns on a present Example. It is explanatory drawing which shows the other operation | movement of the die temperature change in heating, cooling, standby (or purge), and a press slide which concerns on a present Example.

1 to 4 Mold 1a to 4a Supply manifold 1b to 4b Circulation manifold 5a to 5d Temperature sensor 6a to 6d Supply valve 7a to 7d Discharge valve 8 Press section 10 Temperature controller 11 Heating medium path 12 Cooling medium path 13 Air flow Path 14 common medium path 15 discharge medium path 16 inlet steam valve 17 inlet cooling water valve 17 inlet cooling water valve 18 Y-strainer 19 pump 20 pressure switch 21 pressure gauge 22 air source 23 air filter 24 air regulator 25 valve controller 26 control valve 27a to 27d Stop valve 28 Discharge valve 29 Air accumulator tank 30 Heating unit 31 Water softener 32 Chemical injection device 33 Boiler 34 Discharge valve 40 Cooling unit 41 Cooling tower 42 Pump 50 Control means A1 to A4 Switching valve B Switching valve C Switching Valve D1-D4 Switching valve E1-E4 Flow control valve H1-H4 Flow control valve M Switching valve R1-R4 Pressure reducing valve S1, S2 Control valve SR1, SR2 Silent reducer K (For medium temperature monitor) Temperature sensor

Claims (4)

Two types of medium with different temperatures are used for the heating medium of the molds and the cooling medium is used for the cooling medium, and these are switched to the mold medium path by the temperature control device and supplied to the mold. When a temperature difference is required between the upper plate and lower plate of the mold pair, the system repeats the process, the molding of the molded product, and the cooling process of the mold. A heating / cooling system for a mold for heat pressing or heating / cooling, wherein the temperature difference is adjusted by switching the supply of steam and cooling water to each mold,
A heating unit that generates steam as the heating medium;
Supplying and circulating the cooling water as the cooling medium, and a cooling unit including a cooling tower;
A plurality of temperature detectors arranged in the plurality of molds;
A heating medium path that supplies steam to the plurality of molds and has a plurality of switching valves that are opened and closed by air pressure connected to each of the medium paths that are branched into a plurality of systems, while supplying steam, and the cooling tower A cooling medium path for supplying cooling water to the plurality of molds, and a plurality of switching valves that are opened and closed by air pressure connected to the medium paths branched into a plurality of systems, respectively, and supplied with cooling water; A source, an air filter, an air regulator, an air accumulator tank, a control valve, a switching valve that opens and closes by air pressure, a stop valve connected to each of the medium paths branched into a plurality of systems at the subsequent stage of the switching valve, An air flow path for supplying purge air to the mold, and each supply valve connected between the heating medium path, the cooling medium path and the outlet side of the air flow path, and the plurality of molds. Opening and closing operation by air pressure connected to the medium path of multiple systems, and the medium path that sends the media flowing out of the multiple systems of media paths from each mold to one system via the discharge valve and connected to the discharge valve connected to the cooling tower A switching valve that is opened and closed by air pressure connected to a medium path branched in the previous stage of each switching valve of the cooling medium path, and connected to a medium path branched into a plurality of systems from the outlet of the switching valve, A silent reducer having a discharge side connected to the discharge valve, and a medium path branched before the switching valve connected to the medium path and connected to the silent reducer, and sends the cooling water to the cooling unit. A discharge medium path, a temperature determination program is stored, the temperature of each mold is determined based on the temperature detected by each temperature detection unit, and a plurality of switching valves for the heating medium path, cooling Controls a plurality of switching valves for the medium path and a switching valve for the air flow path, performs switching supply control of steam and cooling water to each mold, and purges each mold, and performs molding operation control in each mold. A temperature control device comprising a control means;
Comprising
The purge air flow paths of the plurality of molds are, when performing air purge, the control means, a switching valve provided in the air flow path with a valve controller, a switching valve provided in a discharge medium path, and a cooling medium path. By switching the switching valve provided in the previous stage to the open state and controlling the switching valves provided in the heating medium path and the switching valves of the plurality of systems provided in the cooling medium path to the closed state, The air from the source passes through the air filter, air regulator, air accumulator tank, control valve, switching valve, stop valve, supply valve of each system of the common medium path, each supply manifold provided in the mold, and each mold after reach purged in each mold these, the air that has passed through the mold, each circulation manifold provided on each die, through the discharge valve back to the temperature adjusting device, wherein the discharge medium passage After passing through the switching valve, and configured to mix the coolant circulating to the cooling tower from the discharge valve,
The temperature determination program set in the control means can set a heating determination temperature and a cooling determination temperature for any mold in the mold, and further group the arbitrary molds in the mold. By setting the temperature judgment combination in the group, it is possible to control the press slide descent and press holding time start by the program operation by the heating judgment temperature, and the press part by the program operation by the cooling judgment temperature. The press slide rise and press holding time can be controlled,
Using a single temperature control device, steam is used for the heating medium and water is used for the cooling medium, so that the heating and cooling of the mold can be easily switched in a short time. Heating / cooling system for molds for heat press or heating / cooling. Two types of medium with different temperatures are used for the heating medium of the molds and the cooling medium is used for the cooling medium, and these are switched to the mold medium path by the temperature control device and supplied to the mold. When a temperature difference is required between the upper plate and lower plate of the mold pair, the system repeats the process, the molding of the molded product, and the cooling process of the mold. A heating / cooling system for a mold for heat pressing or heating / cooling, wherein the temperature difference is adjusted by switching the supply of steam and cooling water to each mold,
A heating unit that generates steam as the heating medium;
Supplying and circulating the cooling water as the cooling medium, and a cooling unit including a cooling tower;
A plurality of temperature detectors arranged in the plurality of molds;
A heating medium path that supplies steam to the plurality of molds and has a plurality of switching valves that are opened and closed by air pressure connected to each of the medium paths that are branched into a plurality of systems, while supplying steam, and the cooling tower A cooling medium path for supplying cooling water to the plurality of molds, and a plurality of switching valves that are opened and closed by air pressure connected to the medium paths branched into a plurality of systems, respectively, and supplied with cooling water; A source, an air filter, an air regulator, an air accumulator tank, a control valve, a switching valve that opens and closes by air pressure, a stop valve connected to each of the medium paths branched into a plurality of systems at the subsequent stage of the switching valve, An air flow path for supplying purge air to the mold, and each supply valve connected between the heating medium path, the cooling medium path and the outlet side of the air flow path, and the plurality of molds. Opening and closing operation by air pressure connected to the medium path of multiple systems, and the medium path that sends the media flowing out of the multiple systems of media paths from each mold to one system via the discharge valve and connected to the discharge valve connected to the cooling tower A switching valve that is opened and closed by air pressure connected to a medium path branched in the previous stage of each switching valve of the cooling medium path, and connected to a medium path branched into a plurality of systems from the outlet of the switching valve, A silent reducer having a discharge side connected to the discharge valve, and a medium path branched before the switching valve connected to the discharge medium path and connected to the silent reducer, and the cooling water is supplied to the cooling unit. A discharge medium path to be sent, a temperature determination program is stored, a temperature of each mold is determined based on a temperature detected by each temperature detection unit, and a plurality of switching valves for the heating medium path, Control each of the switching valves of the reject medium path and the switching valve of the air flow path to perform switching supply control of steam and cooling water to each mold and purge each mold, and each mold in each mold A temperature control device comprising a control means for performing molding operation control by lowering the press slide after heating or molding operation control by heating after lowering the press slide of each mold, and
Comprising
The purge air flow paths of the plurality of molds are, when performing air purge, the control means, a switching valve provided in the air flow path with a valve controller, a switching valve provided in a discharge medium path, and a cooling medium path. By switching the switching valve provided in the previous stage to the open state and controlling the switching valves provided in the heating medium path and the switching valves of the plurality of systems provided in the cooling medium path to the closed state, The air from the source passes through the air filter, air regulator, air accumulator tank, control valve, switching valve, stop valve, supply valve of each system of the common medium path, each supply manifold provided in the mold, and each mold after reach purged in each mold these, the air that has passed through the mold, each circulation manifold provided on each die, through the discharge valve back to the temperature adjusting device, wherein the discharge medium passage After passing through the switching valve, and configured to mix the coolant circulating to the cooling tower from the discharge valve,
The temperature determination program set in the control means can set a heating determination temperature and a cooling determination temperature for any mold in the mold, and further group the arbitrary molds in the mold. By setting the temperature judgment combination in the group, it is possible to control the press slide descent and press holding time start by the program operation by the heating judgment temperature, and the press part by the program operation by the cooling judgment temperature. The press slide rise and press holding time can be controlled,
Using a single temperature control device, steam is used for the heating medium and water is used for the cooling medium, so that the heating and cooling of the mold can be easily switched in a short time. Heating / cooling system for molds for heat press or heating / cooling. Two types of medium with different temperatures are used for the heating medium of the molds and the cooling medium is used for the cooling medium, and these are switched to the mold medium path by the temperature control device and supplied to the mold. A system that repeats the process, molding of molded products, and cooling process of the mold,
A heating unit that generates steam as the heating medium;
Supplying and circulating the cooling water as the cooling medium, and a cooling unit including a cooling tower;
A plurality of temperature detectors arranged in the plurality of molds;
A heating medium path that supplies steam to the plurality of molds and has a plurality of switching valves that are opened and closed by air pressure connected to each of the medium paths that are branched into a plurality of systems, while supplying steam, and the cooling tower A cooling medium path for supplying cooling water to the plurality of molds, and a plurality of switching valves that are opened and closed by air pressure connected to the medium paths branched into a plurality of systems, respectively, and supplied with cooling water; A source, an air filter, an air regulator, an air accumulator tank, a control valve, a switching valve that opens and closes by air pressure, a stop valve connected to each of the medium paths branched into a plurality of systems at the subsequent stage of the switching valve, An air flow path for supplying purge air to the mold, and each supply valve connected between the heating medium path, the cooling medium path and the outlet side of the air flow path, and the plurality of molds. Opening and closing operation by air pressure connected to the medium path of multiple systems, and the medium path that sends the media flowing out of the multiple systems of media paths from each mold to one system via the discharge valve and connected to the discharge valve connected to the cooling tower A switching valve that is opened and closed by air pressure connected to a medium path branched in the previous stage of each switching valve of the cooling medium path, and connected to a medium path branched into a plurality of systems from the outlet of the switching valve, A silent reducer having a discharge side connected to the discharge valve, and a medium path branched before the switching valve connected to the discharge medium path and connected to the silent reducer, and the cooling water is supplied to the cooling unit. A discharge medium path to be sent,
When a temperature difference is required between the upper plate and the lower plate of the mold pair, the supply of steam and cooling water from the heating medium path and cooling medium path to the respective molds is switched to reduce the temperature difference. A heating / cooling method of a mold for heat press or heating / cooling adapted to be adjusted,
Detecting the temperature of each mold by each temperature detector disposed in the plurality of molds;
Determining a temperature detected by each temperature detection unit using a temperature determination program stored in advance in the temperature control device;
A process of performing steam and cooling water switching supply control to each die based on the determination result, purge air supply control, and molding operation control in each die,
Including
When performing air purge of the purge air flow paths of the plurality of molds, the control means, a switching valve provided in the air flow path with a valve controller, a switching valve provided in the discharge medium path, and a cooling medium path By controlling the switching valve provided in the previous stage to the open state and controlling each switching valve provided in the heating medium path and the multiple system switching valve provided in the cooling medium path to the closed state, from the air source The air reaches the molds through an air filter, an air regulator, an air accumulator tank, a control valve, a switching valve, a stop valve, a supply valve for each system of the common medium path, and each supply manifold provided in the mold. after purging the inside of each of these molds, air which passes through the respective mold, the respective circulation manifold provided in each mold, returns to the discharge valve the temperature controller via a switching of the discharge medium passage After a valve, configured to mix a coolant circulating to the cooling tower from the discharge valve,
The temperature determination program set in the control means can set a heating determination temperature and a cooling determination temperature for any mold in the mold, and further group the arbitrary molds in the mold. By setting the temperature judgment combination in the group, it is possible to control the press slide descent and press holding time start by the program operation by the heating judgment temperature, and the press part by the program operation by the cooling judgment temperature. The press slide rise and press holding time can be controlled,
Using a single temperature control device, steam is used for the heating medium and water is used for the cooling medium, so that the heating and cooling of the mold can be easily switched in a short time. A method for heating and cooling a mold for hot pressing or heating and cooling. Two types of medium with different temperatures are used for the heating medium of the molds and the cooling medium is used for the cooling medium, and these are switched to the mold medium path by the temperature control device and supplied to the mold. A system that repeats the process, molding of molded products, and cooling process of the mold,
A heating unit that generates steam as the heating medium;
Supplying and circulating the cooling water as the cooling medium, and a cooling unit including a cooling tower;
A plurality of temperature detectors arranged in the plurality of molds;
A heating medium path that supplies steam to the plurality of molds and has a plurality of switching valves that are opened and closed by air pressure connected to each of the medium paths that are branched into a plurality of systems, while supplying steam, and the cooling tower A cooling medium path for supplying cooling water to the plurality of molds, and a plurality of switching valves that are opened and closed by air pressure connected to the medium paths branched into a plurality of systems, respectively, and supplied with cooling water; A source, an air filter, an air regulator, an air accumulator tank, a control valve, a switching valve that opens and closes by air pressure, a stop valve connected to each of the medium paths branched into a plurality of systems at the subsequent stage of the switching valve, An air flow path for supplying purge air to the mold, and each supply valve connected between the heating medium path, the cooling medium path and the outlet side of the air flow path, and the plurality of molds. Opening and closing operation by air pressure connected to the medium path of multiple systems, and the medium path that sends the media flowing out of the multiple systems of media paths from each mold to one system via the discharge valve and connected to the discharge valve connected to the cooling tower A switching valve that is opened and closed by air pressure connected to a medium path branched in the previous stage of each switching valve of the cooling medium path, and connected to a medium path branched into a plurality of systems from the outlet of the switching valve, A silent reducer having a discharge side connected to the discharge valve, and a medium path branched before the switching valve connected to the discharge medium path and connected to the silent reducer, and the cooling water is supplied to the cooling unit. A discharge medium path to be sent,
When a temperature difference is required between the upper plate and the lower plate of the mold pair, the supply of steam and cooling water from the heating medium path and cooling medium path to the respective molds is switched to reduce the temperature difference. A heating / cooling method of a mold for heat press or heating / cooling adapted to be adjusted,
Detecting the temperature of each mold by each temperature detector disposed in the plurality of molds;
Determining a temperature detected by each temperature detection unit using a temperature determination program stored in advance in the temperature control device;
Based on the determination result, the control unit controls the plurality of switching valves for the heating medium path, the plurality of switching valves for the cooling medium path, and the switching valve for the air flow path to control supply and purge of steam and cooling water to each mold. A step of performing air supply control, control of molding operation by lowering the press slide after heating of each mold in each mold or molding operation control by heating after lowering of the press slide of each mold, and
Including
When performing air purge of the purge air flow paths of the plurality of molds, the control means, a switching valve provided in the air flow path with a valve controller, a switching valve provided in the discharge medium path, and a cooling medium path By controlling the switching valve provided in the previous stage to the open state and controlling each switching valve provided in the heating medium path and the switching valves of the plurality of systems provided in the cooling medium path to the closed state, the air source Air from the air filter, air regulator, air accumulator tank, control valve, switching valve, stop valve, supply valve of each system of common media path, each supply manifold provided in the mold, to each mold lead after purging the inside of each of these molds, air which passes through the respective mold, the respective circulation manifold provided in each mold, returns to the temperature control device through the discharge valve, the discharge medium passage After a Kawaben, configured to mix a coolant circulating to the cooling tower from the discharge valve,
The temperature determination program set in the control means can set a heating determination temperature and a cooling determination temperature for any mold in the mold, and further group the arbitrary molds in the mold. By setting the temperature judgment combination in the group, it is possible to control the press slide descent and press holding time start by the program operation by the heating judgment temperature, and the press part by the program operation by the cooling judgment temperature. The press slide rise and press holding time can be controlled,
Using a single temperature control device, steam is used for the heating medium and water is used for the cooling medium, so that the heating and cooling of the mold can be easily switched in a short time. A method for heating and cooling a mold for hot pressing or heating and cooling.

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