JP5543130B2 - Heating system - Google Patents

Description

The present invention relates to a heating system using superheated steam, and more specifically to reuse of superheated steam.

  As an example of the process by heating, there is a molding process in which a compact material is thermally compressed with a mold. For example, a silencer (sound absorbing material) for a vehicle is molded by thermally compressing a molded body material such as a mixture of a felt (fiber body) and a binder with a mold. As a method for producing such a molded product, there is a technique described in Patent Document 1 below. In Patent Document 1, a processing material, which is a mixture of raw materials and a thermoplastic fibrous binder, is blown into a molding die mainly from a light-weight chip-like solid material, and further molded into a soundproof material shape by a heating press. In the method of manufacturing a soundproofing material, the heating performed on the treatment material and the mold in the heating press step and the cooling for removing the molded product performed next are passed through the upper and lower mold surfaces of the mold. It is disclosed that hot air or cold air is passed through the pores in one direction.

  Another example of the heat treatment is curing of a thermosetting resin. In the following Patent Document 2, a thermostatic chamber that keeps a heated object, a circulation mechanism that circulates gas inside the thermostat, a heater for heating the circulation gas, a superheater that heats water vapor to a boiling point or more, A thermosetting characterized by comprising an evaporator that converts water into steam and supplying it to a superheater, and configured to heat a heated object containing a thermosetting resin composition with a gas containing superheated steam having a boiling point or higher. An apparatus for manufacturing a resin composition cured product is disclosed. This technique aims to shorten the heating time and improve energy efficiency by using superheated steam.

JP 2001-60093 A JP 2001-246630 A

  However, in the technique described in Patent Document 1 described above, since heating (hot air) and cooling (outside air) are performed in a state where the upper and lower molds are combined, the cooling efficiency is not sufficient, and it is difficult to significantly shorten the molding cycle. It is. Further, since hot air (hot air) is used for heating, the set temperature cannot be increased, and good energy efficiency cannot be obtained. Furthermore, although a gas burner or the like is used to generate hot air, there is a disadvantage that the molded body material may ignite the gas.

  On the other hand, the technique described in Patent Document 2 discloses that after heating a heating object, a part of the superheated steam in the thermostat is returned to the evaporator and used again as superheated steam. Most of the superheated steam is exhausted. For this reason, the supply amount of superheated steam to be newly supplied cannot be significantly reduced, and improvement in energy efficiency and reduction in environmental load are not sufficient. If most of the superheated steam is reused in the configuration of the technique described in Patent Document 2, a pump having the ability (pressure) to return a large amount of superheated steam to the evaporator is required. There was the inconvenience that the pump was not found.

The present invention focuses on the above points, and provides a heating system using superheated steam that can reduce the amount of newly supplied superheated steam, improve energy efficiency, and reduce environmental load. That is the purpose. Another object is to provide a heating system capable of increasing the heating efficiency and the cooling efficiency to shorten the molding cycle when used for heat compression of a molded body material.

The heating system of the present invention is a heating system using superheated steam, which is boiler means for generating water vapor by heating water or hot water, superheated steam generating means for heating the water vapor to generate superheated steam, superheated steam A heating furnace having a heat storage tank equipped with a first outlet pipe having a plurality of outlets and a second outlet pipe, and superheated steam generated by the superheated steam generating means are supplied to the first outlet pipe. A first superheated steam supply pipe to be sent, a recovery means for sucking and recovering the superheated steam after being used in the heating furnace, a reheating means for reheating the superheated steam recovered by the recovery means, and the reheating means A second superheated steam supply pipe for sending the reheated superheated steam to the second blowing pipe at a predetermined ratio with respect to the superheated steam sent by the first superheated steam supply pipe, above the heating furnace By the lifting means And an upper mold fixed to the upper tank, and a molding material fixed between the upper tank and the upper mold so as to be positioned on the heat storage tank in the heating furnace. And a shutter that is provided above the heating furnace and that slides between the heating furnace and the lower mold so as to be cut off by a driving means. Features.

One of the main forms is that the upper mold is fixed to the upper tank so as to form a gap with the inner surface of the upper tank, and the upper mold and the lower mold are made of the molded material. It is characterized by having a plurality of vent holes leading to the mold surface for compression .

Another aspect is characterized in that the upper tank is provided with an exhaust means that leads to a gap with the upper mold .

Still another embodiment is characterized in that a heat storage body is disposed between the bottom surface of the lower mold and the first outlet pipe. Yet another embodiment is characterized in that the heat storage body has a honeycomb shape .

  One of the main forms is that the total cross-sectional area of the plurality of outlets of the first outlet pipe is determined by the discharge pressure of the superheated steam sent from the superheated steam generation means and the required amount of steam, The total cross-sectional area of the plurality of outlets of the outlet pipe 2 is determined by the discharge pressure of the reheated superheated steam sent from the reheating means by the recovery means and the required amount of steam.

According to the present invention, the steam sent from the boiler means is heated by the superheated steam generating means to generate superheated steam, the heating furnace is heated by the superheated steam, and the superheated steam after use is recovered and recycled. Heat and reuse for heating furnace. At that time, the supply amount of the new superheated steam with nitrous et beforehand the heating furnace, and a supply amount setting to your wolfberry the ratio of superheated steam reuse. For this reason, it is possible to reduce the amount of superheated steam to be newly supplied, improve the energy efficiency, and reduce the environmental load. Moreover, when it uses for the heat compression of a molded object material, a heating cycle and a cooling efficiency can be improved and a molding cycle can be shortened significantly.

It is a figure which shows the whole structure of Example 1 of this invention. It is a figure which shows the whole structure of Example 2 of this invention. It is a figure which shows the whole structure of Example 3 of this invention.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

First, Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing the overall configuration of the heating system of the present embodiment. The heating system 10 of the present embodiment includes a boiler 12, a superheated steam generator 20, a heating furnace 30, a cooling device 48, a suction pump 50, a reheating device 64, a plurality of pipes, and the like. The boiler 12 generates water vapor by heating water or hot water, and is connected to the superheated steam generator 20 by a water vapor supply pipe 14. A pressure reducing valve 16 is attached to the water vapor supply pipe 14. For example, the steam pressure 8 kg / cm ² generated in the boiler 12, by reducing the pressure to 2 kg / cm ² by the pressure reducing valve 16, it is not necessary to the overheated steam generator 20 to the pressure-resistant structure. The superheated steam generator 20 heats the water vapor sent from the boiler 12 via the water vapor supply pipe 14 and generates superheated steam (superheated steam). The superheated steam generator 20 is connected by a first superheated steam supply pipe 22 to a first outlet pipe 32 described later. In the following description, the superheated steam supplied from the superheated steam generator 20 is expressed as “new superheated steam” in order to distinguish it from the superheated steam reheated by the reheating device 64. is there.

  The heating furnace 30 performs a desired heat treatment by blowing superheated steam onto the object 38 to be processed. The first blowing pipe 32 having a plurality of outlets 34 for the superheated steam 36 and a plurality of the superheated steam 36 are provided. The second outlet pipe 40 having the outlet 42 is provided. The first blowing pipe 32 is for blowing the superheated steam newly generated by the superheated steam generator 20 onto the object 38 to be processed, and the second blowing pipe 40 is used for the reheating. This is for spraying the recovered superheated steam reheated by the device 64 onto the object 38 to be processed. The supply ratio of the new superheated steam discharged from the first blowing pipe 32 and the reheated superheated steam discharged from the second blowing pipe 40 is set in advance.

In addition, the sum of the cross-sectional areas of the plurality of outlets 34 of the first outlet pipe 32 is determined by the discharge pressure of the new superheated steam and the required steam amount, and the plurality of outlets of the second outlet pipe 40. The total cross-sectional area of 42 is determined by the discharge pressure of the reheated superheated steam and the required amount of steam. For example, the required amount of new superheated steam is 100 kg / H, and the required amount of reheated superheated steam is 60 kg / H. At this time, if the discharge pressure of the new superheated steam is 2 kg / cm ² , the sum of the cross-sectional areas of the plurality of outlets 34 of the first outlet pipe 32 is set to 60 mm ^2, and the discharge pressure of the reheated superheated steam If (that is, the discharge pressure of the suction pump 50) is 0.5 kg / cm ² , the total sectional area of the plurality of outlets 42 of the second outlet pipe 40 is 300 mm ² . The diameter and the number of the outlets 34 and 42 can be arbitrarily changed as long as the total cross-sectional area is satisfied.

The heating furnace 30 as described above is provided with an exhaust port 44, and a recovery pipe 46 is connected to the exhaust port 44. The recovery pipe 46 is connected to the suction pump 50. In this embodiment, a supercharger or a turbocharger having a high discharge pressure (for example, about 0.5 kg / cm ² ) is used as the suction pump 50, and the temperature of the recovered steam sent to the suction pump 50 is high. A cooling device 48 is provided in the recovery pipe 46 in order to cool in advance if it is too much. The cooling device 48 may be installed or used as necessary if the temperature of the recovered superheated steam is lower than the temperature that can be withstood by the suction pump 50 (for example, 200 ° C.).

  A belt 58 is wound around a pulley 52A provided at the tip of the shaft 52 of the suction pump 50 and a pulley 56A provided at the tip of the output shaft 56 of the motor 54, and rotates the motor 54. As a result, the suction pump 50 can be driven. The driving of the motor 54 is controlled by an inverter 60. The suction pump 50 is connected to a reheating device 64 by a circulation pipe 62. The circulation pipe 62 is further connected to an exhaust pipe 68 for exhausting the superheated steam collected through the gate valve 66. The reheating device 64 is for reheating the recovered superheated steam to a temperature that can be used in the heating furnace 30, and is heated by the second superheated steam supply pipe 70 for sending the reheated superheated steam. It is connected to the second blowing pipe 40 in the furnace 30.

  Next, the operation of this embodiment will be described. First, water or hot water is supplied to the boiler 12 from a supply source (not shown), and water vapor is generated. The steam generated in the boiler 12 is sent to the superheated steam generator 20 via the steam supply pipe 14 to become superheated steam, and the superheated steam is supplied to the first heating furnace 30 via the first superheated steam supply pipe 22. It is sent to the piping 32 for blowout and blown toward the processing object 38 from the blowout port 34. The superheated steam 36 blown to the object 38 to be processed in the heating furnace 30 is sent to the cooling device 48 through the exhaust port 44 and the recovery pipe 46 by driving the suction pump 50 so that it becomes 200 ° C. or less, for example. To be cooled. The cooled recovered superheated steam passes through the recovery piping 46 and the circulation piping 62 by the suction pump 50 having a high discharge pressure, and is mostly sent to the reheating device 64. The exhaust gas is always exhausted through the gate valve 68 and the exhaust pipe 68. The amount of recovered superheated steam that is exhausted in a minute amount is determined according to the amount of new superheated steam that is always supplied in a minute amount from the superheated steam generator 20. Thus, the inside of the heating furnace 30 is maintained in an atmospheric pressure state by always exhausting a small amount of recovered superheated steam. When the recovered superheated steam is not reused, the gate valve 66 is opened, and all recovered superheated steam is exhausted from the exhaust pipe 68.

  The recovered superheated steam sent to the reheating device 64 is reheated to a temperature that can be used in the heating furnace 30, and the second blowing pipe 40 of the heating furnace 30 is supplied via the second superheated steam supply pipe 70. Sent to. At this time, a renewed superheated steam is supplied to the second blowing pipe 40, and a small amount of new superheated steam is always supplied to the first blowing pipe 32. The supply ratio of the superheated steam sent to the first blowing pipe 32 and the second blowing pipe 40 is set in advance as described above. And the superheated steam 36 is simultaneously sprayed toward the process target object 38 from the blower outlets 34 and 42 by which the sum total of each cross-sectional area was determined by the required steam quantity and discharge pressure based on this set supply ratio. The recovery, cooling, and reheating of the superheated steam after being sprayed on the processing object 38 are as described above. The heating by the superheated steam generator 20 and the reheating device 64 may be controlled by a temperature sensor (not shown) provided in the heating furnace 30 and the recovery pipe 46, or according to the detection result of a pressure sensor (not shown), The circulation of the recovered superheated steam may be stopped, or the amount of reuse may be adjusted.

  Thus, according to Example 1, the steam sent from the boiler 12 is heated by the superheated steam generator 20 to generate superheated steam, the heating furnace 30 is heated by the superheated steam, The superheated steam is collected and reheated and reused for heating the heating furnace 30. At that time, the new superheated steam sent to the first blowing pipe 32 and the reheated superheated steam sent to the second blowing pipe 40 are simultaneously supplied at a predetermined supply ratio. The total cross-sectional area of the outlet 34 of the first outlet pipe 32 that supplies new superheated steam generated by the superheated steam generator 20 and the outlet of the second outlet pipe 40 that supplies reused superheated steam. The total cross-sectional area of the outlet 42 is determined by the discharge pressure of the superheated steam and the required steam amount. Therefore, the amount of superheated steam to be newly supplied and superheated steam to be exhausted can be greatly reduced, so that energy efficiency can be remarkably improved and the environmental load can be reduced. Moreover, since superheated steam is utilized, there exists an effect that the heating rate of the process target object 38 improves markedly.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. In addition, the same code | symbol shall be used for the component which is the same as that of Example 1 mentioned above, or respond | corresponds (it is the same also about a following example). In the first embodiment described above, when the superheated steam used in the heating furnace 30 is reused, the reheated device 64 is provided to reheat the recovered superheated steam. In this example, the steam generator 20 is used for reheating the recovered superheated steam. As shown in FIG. 2, the heating system 100 of the present embodiment includes a boiler 12, a superheated steam generator 20, a heating furnace 30, a cooling device 48, a suction pump 50, an oxygen concentration meter 110, an electric three-way valve 120, It consists of many pipes. The configurations of the boiler 12, the superheated steam generator 20, the cooling device 48, and the suction pump 50 are the same as those in the first embodiment.

  In this embodiment, the superheated steam generated by the superheated steam generator 20 is sent to the heating furnace 30 through the superheated steam supply pipe 102. Blowing pipes 104A and 104B branched from the superheated steam supply pipe 102 are provided in the heating furnace 30. The outlet pipes 104A and 10B are provided with outlets 106A and 106B for the superheated steam 36, respectively, and spray the superheated steam 36 against the processing object 38. The diameters of the air outlets 106A and 106B may be the same or different as necessary.

  In the present embodiment, the oxygen concentration meter 110 is connected to the recovery pipe 46 for sending the superheated steam recovered from the heating furnace 30 to the suction pump 50. This is for monitoring the amount of superheated steam in the heating furnace 30 by detecting the oxygen concentration in the heating furnace 30 recovered from the exhaust port 44. Specifically, if the superheated steam 36 is filled in the heating furnace 30 and the amount of superheated steam is appropriately maintained, oxygen is not detected from the recovered superheated steam. On the other hand, when the amount of superheated steam in the heating furnace 30 decreases, it is determined that oxygen is mixed and the amount of superheated steam 36 is insufficient (the amount of heat is insufficient).

  Furthermore, in this embodiment, the suction pump 50 is connected to the inlet side of the superheated steam generator 20 by a circulation pipe 112, and the recovered superheated steam is used in the heating furnace 30 by the superheated steam generator 20. Reheated to a temperature where it can. The circulation pipe 112 is connected to the water vapor supply pipe 14 via an electric three-way valve 120, and the electric three-way valve 120 is operated based on a switching instruction according to the detection result of the oxygen concentration meter 110. By doing so, the flow path of the superheated steam is automatically switched by one electric three-way valve (or electromagnetic valve).

  Next, the operation of this embodiment will be described. First, water or hot water is supplied from a supply source (not shown) to the boiler 12 to generate water vapor. At the beginning of the heat treatment, since there is no recovered superheated steam, the electric three-way valve 120 connects the steam supply pipe 14 and the superheated steam generator 20. Then, the steam generated in the boiler 12 is sent to the superheated steam generator 20 via the steam supply pipe 14 to become superheated steam, and sent to the blowing pipes 104A and 104B of the heating furnace 30 via the superheated steam supply pipe 102. Then, the superheated steam 36 is blown toward the processing object 38 from the air outlets 106A and 106B. The superheated steam blown to the object to be treated 38 in the heating furnace 30 is sent to the cooling device 48 via the exhaust port 44 and the recovery pipe 46 by driving the suction pump 50 so that it becomes, for example, 200 ° C. or less. To be cooled. The cooled recovered superheated steam is sent to the circulation pipe 112 via the recovery pipe 46 and the suction pump 50, and most of the recovered superheated steam is sent to the electric three-way valve 120 via the circulation pipe 112. A small amount of recovered superheated steam is always exhausted through the gate valve 66 and the exhaust pipe 68 as in the first embodiment. When the recovered superheated steam is not reused, the gate valve 66 is opened, and all recovered superheated steam is exhausted from the exhaust pipe 68.

  The recovered superheated steam sent to the circulation pipe 112 is sent into the superheated steam generator 20 when the electric three-way valve 120 is opened as a flow path on the circulation pipe 112 side, and the heating It is reheated to a temperature that can be used in the furnace 30, sent to the superheated furnace 30 through the superheated steam supply pipe 102, and reused. The reused superheated steam is recovered again by the suction pump 50, and the oxygen concentration in the superheated steam recovered from the heating furnace 30 is measured by the oxygen concentration meter 110 during such a heating cycle. Then, when it is determined from the measurement result of the oxygen concentration meter 110 that the pressure in the heating furnace 30 has decreased, the flow path of the superheated steam is switched by the electric three-way valve 120 and is generated by the boiler 12. Steam is sent to the superheated steam generator 20.

  In this embodiment, since the superheated steam generator 20 is used for reheating the recovered heating steam, the same effect can be obtained without using the reheating apparatus of the first embodiment described above. The system can be made compact. In addition, since the switching of the flow path by the electric three-way valve 120 is performed according to the detection result of the oxygen concentration in the recovered superheated steam by the oxygen concentration meter 110, good pressure control in the heating furnace 30 is possible. is there.

  Next, Embodiment 3 of the present invention will be described with reference to FIG. The present embodiment is an example in which the heating system of the first embodiment described above is applied to heat compression of a molded body. The molded body is, for example, a vehicle silencer (sound absorbing material). As shown in FIG. 3, the heating system 200 of the present embodiment includes a boiler 12, a superheated steam generator 20, a heating furnace 230, a cooling device 48, a suction pump 50, a reheating device 64, and a mat-like molded body material. The upper mold 212 and the lower mold 220 for heating and compressing the 218, an upper tank 210, an elevating device 216, a slide shutter 232, a driving device 234 thereof, a blower 244 for intake air, and the like. As is known, the molded body material 218 is, for example, a mixture of felt (fiber body) made of an end material such as a cloth material and a thermoplastic resin serving as a binder.

  The upper mold 212 is fixed to the upper tank 210 so as to form a gap 215 for allowing air or steam to pass between the upper mold 210 and the lower mold 220 is a heat storage tank 240 in the heating furnace 230. It fixes to the upper tank 210 so that it may be located on top. An upper mold fixing cylinder (upper mold locking device) 246 and a lower mold fixing cylinder (lower mold locking device) 248 are provided on opposite side surfaces of the upper tank 210, respectively. The rods 246A and 248A of the cylinders 246 and 248 are moved in the direction of the arrow F2 in FIG. 3, and their tips are fixed to the upper tank 210 by pressing the side surfaces of the upper mold 212 and the lower mold 220. Yes. In the illustrated example, the tips of the rods 246 </ b> A and 248 </ b> A are fitted into the concave portions on the side surfaces of the upper mold 212 and the lower mold 220. The upper die 212 is always fixed by an upper die fixing cylinder 246, and the lower die 220 is detachably fixed by a lower die fixing cylinder 248. Of course, the upper mold 212 may also be removed during maintenance.

  The upper mold 212 and the lower mold 220 are formed by compressing the molded body material 218 into molds with the mold surfaces 212A and 220A, and forming a plurality of vent holes 214 and 222 communicating with the respective mold surfaces 212A and 220A. I have. The vent hole 214 of the upper mold 212 is connected to the gap 215 at the upper side, and a blower 244 is connected to the exhaust port 210 </ b> B provided on the side surface of the upper tank 210 via the butterfly valve 242. The other side surface of the upper tank 210 is provided with another exhaust port 210A for letting overheated steam during the molding process escape to the outside. One end of a rod 217 is fixed to the upper surface of the upper tank 210, and an elevating device 216 is provided on the other end side of the rod 217. The upper die 212 can be raised and lowered via the upper tank 210 in the direction indicated by the arrow F1 in FIG. Since the lower mold 220 is detachable from the upper tank 210 by the lower mold fixing cylinder 248 described above, the lower mold 220 moves up and down together with the upper mold 212 in the locked state.

  On the other hand, a heating furnace 230 is provided below the lower mold 220. In addition to the first blowing pipe 32 that sends the superheated steam generated by the superheated steam generator 20, the regenerative superheated steam reheated by the reheater 64 is sent to the heat storage tank 240 in the heating furnace 230. The 2nd piping 40 for blowing is arrange | positioned, and the superheated steam 36 is injected from the some blower outlets 34 and 42 provided in these. Further, a drain 236 for discharging liquefied superheated steam to the outside is provided on the bottom surface of the heating furnace 230. Above such a heating furnace 230, a slide shutter 232 is provided for blocking the space from the lower mold 220. The slide shutter 232 is connected to the driving device 234, and can slide between the lower mold 220 and the heat storage tank 240 and can store heat in the heat storage tank 240 by sliding in the direction indicated by the arrow F2 in FIG. It has become. As the slide shutter 232, for example, a material having heat insulation is used.

  Further, a honeycomb-shaped heat storage body 250 may be disposed between the bottom surface of the lower mold 220 and the blowing pipe 32. By providing the heat storage body 250, the heat storage efficiency of the heat storage tank 240 can be further improved. In the present embodiment, when the slide shutter 232 is closed, the entire heat storage tank 240 is stored by the superheated steam 36 injected from the outlets 34 and 42. Further, when the slide shutter 232 is opened, the lower mold 220 is heated by the heat storage tank 240, and a part of the superheated steam 36 is passed through the honeycomb-shaped passage of the heat storage body 250 and the air holes 222 of the lower mold 220. The molded body material 218 is heated directly through the.

  Next, the molding procedure according to this embodiment will be described. First, the slide shutter 232 is closed and supply of superheated steam is started from the superheated steam generator 20 via the first superheated steam supply pipe 22 and the first outlet pipe 32, and the heat storage tank 240 in the heating furnace 230 is opened. Stores heat. Next, the molded body material 218 is placed on the lower mold 220. Then, the upper mold 212 fixed to the upper tub 210 by the upper mold fixing cylinder 246 is lowered in the direction indicated by the arrow F 1, the molded material 218 is sandwiched between the lower mold 220 and compressed, and the slide shutter 232 is also compressed. And start heating. At this time, the superheated steam that has entered the vent hole 214 via the vent hole 222 and the molded body material 218 is exhausted via the gap 215 and the exhaust port 210A. Further, the lower mold 20 is fixed by the lower mold fixing cylinder 248. In this example, since superheated steam of about 400 ° C. is used for heating, the conventional molding method in which heating is performed with hot air of about 200 ° C. requires a heating time of about 18 seconds, whereas in about 8 seconds. Heating can be performed efficiently and in a short time. Further, the entire apparatus can be reduced in size.

  When the heating is finished, the slide shutter 232 is slid to close the upper part of the heat storage tank 240, and then the upper mold 212 and the lower mold 220 are moved to the arrows while the molding material 218 is sandwiched between the upper mold 212 and the lower mold 220. It raises as shown to F1 and isolate | separates from the heating furnace 230 (thru | or the thermal storage tank 240). The lower mold 220 is fixed to the upper tank 210 in advance by the lower mold fixing cylinder 248. In the present embodiment, since the superheated steam is continuously supplied from the superheated steam generator 20 even after the upper mold 212 and the lower mold 220 are raised, the heat storage tank 240 can be stored and the next molding is performed. It is convenient to do. At this time, the superheated steam that has heated the heat storage tank 240 is recovered from the exhaust port 44 in the same manner as in the first embodiment, and is reheated by the reheating device 64 in the same manner as in the first embodiment. It is sent to the second blowing pipe 40 via the supply pipe 70 and reused for heating the heating furnace 230.

  When the upper mold 212 and the lower mold 210 are raised, the blower 244 connected to the upper tank 210 is turned on and the butterfly valve 242 is opened, and outside air is taken in from the lower mold 220 through the vent hole 222 to form a molded body material. Cool through 218. The time required for cooling is, for example, about 8 seconds, which can be significantly shortened compared to about 18 seconds required for the conventional method using hot air described above. The outside air that has passed through the molding material 218 passes through the vent hole 214, the gap 215, and the exhaust port 210B of the upper mold 212, and is exhausted to the outside through the butterfly valve 242 and the blower 244. When the cooling is completed as described above, the lower mold 220 is released from the lower mold fixing cylinder 248, the lower mold 220 is separated from the upper mold 212, and the molded body together with the lower mold 220 is not shown. And is moved from above the heating furnace 230. In other words, it is moved out of the molding area. Next, a molding material 218 for the next molding is set in another lower mold 220, and the lower mold 220 is placed on the heating furnace 230. Then, the upper tank 210 and the upper mold 212 are lowered by the lifting device 216, and molding is performed in the same manner as described above.

Thus, according to Example 3, in addition to the effect of Example 1 mentioned above, there exist the following effects.
(1) The heat storage tank 240 in the heating furnace 230 is always stored, and the molding material 218 is heated and compressed by the upper mold 212 and the lower mold 220 provided with the vent holes 214 and 222 respectively leading to the mold surfaces 212A and 220A. Thereafter, the lower mold 220 is raised and separated from the lower tank while the molding material 218 is sandwiched between the upper mold 212 and the upper mold 212. The blower 244 connected to the upper tub 210 takes in outside air from the air holes 222 of the lower mold 220, passes the molded body material 218, cools, and then separates the upper mold 212 and the lower mold 220 to form a molded body. Therefore, the heating and cooling efficiency can be improved, and the molding cycle can be greatly shortened.

(2) Since the heat storage tank 240 to perform heating by using superheated steam, a further shortening of molding cycle, energy saving, together with the compactness permits the equipment, the environmental impact by reducing emissions of CO ₂ Reduction can be achieved.
(3) Since the heat storage body 250 is provided in the heat storage tank 240, the heat storage effect can be increased.
(4) By separating the molded body together with the lower mold 220 from the upper tank 210 after cooling is completed, the operation of the lifting device 216 can be reduced and the molding cycle can be shortened.
(5) Work safety can be improved by taking out the molded body and replacing the molded body material 218 outside the molding area.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The system configuration shown in the above embodiment is merely an example, and the design may be changed as appropriate so as to achieve the same effect. For example, the oxygen concentration meter 110 shown in the second embodiment may be provided in the system of the first embodiment to monitor the amount of superheated steam in the heating furnace 30. In the first and second embodiments, the cooling device 48 is provided. However, this is also an example, and may be provided as necessary. Moreover, you may cool using the collection | recovery piping 46, without providing the cooling device 48. FIG.
(2) The diameters of the air outlets 34 and 42 shown in the first embodiment are also examples, and may be changed as appropriate so as to achieve the same effect.
(3) The discharge pressure of the suction pump 50 shown in the first embodiment, the required amount of superheated steam, the total cross-sectional area of the outlet, etc. are examples, and may be appropriately changed so as to achieve the same effect.
(4) As a form of heat treatment using superheated steam of the present invention, various modes such as heating, drying, cooling, washing, sintering, thawing, dehumidification, steaming, rice cooking, sterilization, heating, etc. are possible. is there.

(5) The heat storage body 250 shown in the third embodiment may be provided if necessary. Moreover, in the said Example 3, although the honeycomb-shaped heat storage body was mentioned as an example, utilization of other well-known various heat storage bodies is not prevented.
(6) The slide mechanism of the slide shutter 232 of the third embodiment, the elevating mechanism of the upper tub 210, and the fixing mechanism of the upper mold 212 and the lower mold 220 are also examples, and the design is appropriately changed so as to achieve the same effect. Good.
(7) The operation shown in the third embodiment is also an example, and may be appropriately changed so as to achieve the same effect. For example, the locking of the upper mold 212 and the lower mold 220, the timing of releasing the lock, and the like are examples, and may be appropriately changed so as to achieve the same effect. Moreover, the procedure of taking out the molded body and replacing the molded body material described above is also an example, and can be appropriately changed so as to produce the same effect. Furthermore, in the above-described embodiment, the case where continuous molding is performed has been described, but the present invention may be applied to only one molding.
(8) In the third embodiment, a case where a silencer (sound absorbing material) for a vehicle is molded is taken as an example, but this is also an example, and it is obtained by heating and compressing a molded body material with an upper mold and a lower mold. The present invention can be applied to all known moldings.

According to the present invention, the steam sent from the boiler means is heated by the superheated steam generating means to generate superheated steam, the heating furnace is heated by the superheated steam, and the superheated steam after use is recovered and recycled. Heat and reuse for heating furnace. At that time, was with your wolfberry set nitrous et al beforehand supply ratio of the superheated steam of new superheated steam and reuse. For this reason, it can be applied to a heating system using superheated steam. In particular, it is suitable as a heating system for producing molded articles for interior materials such as silencers (or sound absorbing materials), door trims, quarter trims, pillar garnishes, deck boards, roof linings and carpets for vehicles.

DESCRIPTION OF SYMBOLS 10: Heating system 12: Boiler 14: Steam supply pipe 16: Pressure reducing valve 20: Superheated steam generator 22: 1st superheated steam supply pipe 30: Heating furnace 32: 1st piping 34,42: Outlet 36 : Superheated steam 38: Object to be treated 40: Second blowing pipe 44: Exhaust port 46: Recovery pipe 48: Cooling device 50: Suction pump 52: Shaft 52A, 56A: Pulley 54: Motor 56: Output shaft 58: Belt 60: Inverter 62: Circulation pipe 64: Reheating device 66: Gate valve 68: Exhaust pipe 70: Second superheated steam supply pipe 100: Heating system 102: Superheated steam supply pipe 104A, 104B: Blowout pipe 106A, 106B: Outlet 110: Oxygen concentration meter 112: Circulation pipe 120: Electric three-way valve (solenoid valve)
200: heating system 210: upper tank 210A, 210B: exhaust port 212: upper mold 212A: mold surface 214, 222: vent hole 215: gap 216: lifting device 217: rod 218: molded body material 220: lower mold 220A: mold Surface 230: Heating furnace 232: Slide shutter 234: Drive device 236: Drain 240: Heat storage tank 242: Butterfly valve 244: Blower 246: Upper mold fixing cylinder 246A, 248A: Rod 248: Lower mold fixing cylinder 250: Heat storage body

Claims (6)

A heating system using superheated steam,
Boiler means for generating water vapor by heating water or hot water,
Superheated steam generating means for heating the steam and generating superheated steam;
A heating furnace having a heat storage tank having a first outlet pipe having a plurality of outlets of superheated steam and a second outlet pipe;
A first superheated steam supply pipe for sending the superheated steam generated by the superheated steam generating means to the first outlet pipe;
Recovery means for sucking and recovering superheated steam after being used in the heating furnace,
Reheating means for reheating superheated steam recovered by the recovery means;
A second superheated steam supply pipe for sending the superheated steam reheated by the reheating means to the second blowing pipe at a predetermined ratio with respect to the superheated steam sent by the first superheated steam supply pipe;
An upper tank which is disposed above the heating furnace and can be moved up and down by lifting means;
An upper mold fixed to the upper tank;
A lower mold that is fixed to the upper tank so as to be positioned on the heat storage tank in the heating furnace, and is heated and compressed by sandwiching a molding material between the upper mold,
A shutter that is provided above the heating furnace and that slides between the heating furnace and the lower mold by a driving means so as to be shut off;
A heating system comprising: The upper mold is fixed to the upper tank so as to form a gap with the inner surface of the upper tank,
2. The heating system according to claim 1, wherein the upper mold and the lower mold have a plurality of vent holes leading to a mold surface for compressing the molded material. The heating system according to claim 2, wherein the upper tank is provided with an exhaust unit that leads to a gap with the upper mold. The heating system according to any one of claims 1 to 3, wherein a heat storage body is disposed between the bottom surface of the lower mold and the first blowing pipe. The heating system according to claim 4, wherein the heat storage body has a honeycomb shape. The total cross-sectional area of the plurality of outlets of the first outlet pipe is determined by the discharge pressure of the superheated steam sent from the superheated steam generating means and the required steam amount, and the plurality of outlet outlet pipes of the second outlet pipe sectional area of the total outlet is any one of claims 1 to 5, characterized in that it is determined by the discharge pressure and the required amount of steam reheated superheated steam is fed from the re-heating means by said recovery means one The heating system according to item.

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