WO2020255604A1 - 真空断熱体の製造方法、及び真空断熱体 - Google Patents
真空断熱体の製造方法、及び真空断熱体 Download PDFInfo
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- WO2020255604A1 WO2020255604A1 PCT/JP2020/019696 JP2020019696W WO2020255604A1 WO 2020255604 A1 WO2020255604 A1 WO 2020255604A1 JP 2020019696 W JP2020019696 W JP 2020019696W WO 2020255604 A1 WO2020255604 A1 WO 2020255604A1
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- foam
- hollow portion
- foaming agent
- foaming
- hollow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1266—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being completely encapsulated, e.g. for packaging purposes or as reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1271—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed parts being partially covered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/128—Internally reinforcing constructional elements, e.g. beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/18—Filling preformed cavities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
- B29C44/5609—Purging of residual gas, e.g. noxious or explosive blowing agents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
- B29K2995/0015—Insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
- B29K2995/0016—Non-flammable or resistant to heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/242—Slab shaped vacuum insulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/10—Insulation, e.g. vacuum or aerogel insulation
Definitions
- the present invention relates to a method for manufacturing a vacuum insulation body and a vacuum insulation body.
- a vacuum heat insulating panel for construction in which a glass fiber is used as a core material and a core material is packed with a resin film containing an aluminum layer (see, for example, Patent Document 1).
- This vacuum insulation panel is a diversion of refrigerator technology, has an undetermined shape (no shape stability), and does not have fire resistance. Further, since the resin film allows nitrogen and hydrogen to enter the atmosphere, the degree of vacuum decreases and there is a problem in heat insulation.
- a vacuum insulation panel using glass fiber as a core material and packed with a thin stainless steel plate is also known (see, for example, Patent Document 2). Since this vacuum insulation panel uses a thin stainless steel plate, it can maintain a vacuum and ensure heat insulation, but its shape stability is insufficient and the core material is glass fiber (shrinks at 400 ° C or higher). Therefore, the fire resistance is also insufficient.
- the above problem is not limited to the vacuum heat insulating panel, but is also common to the non-panel-shaped vacuum heat insulating body having the same size as the vacuum heat insulating panel.
- the present invention has been made to solve such a problem, and an object of the present invention is a method for manufacturing a vacuum heat insulating body capable of ensuring fire resistance, shape stability, and heat insulating property, and a vacuum.
- the purpose is to provide insulation.
- the method for producing a vacuum heat insulating body according to the present invention includes a first step of preparing a hollow body having a heat resistance of at least enough to withstand a flame of 781 ° C. for 20 minutes and having a hollow portion formed therein, and the above-mentioned method.
- An inorganic foaming agent having heat resistance is introduced into the hollow portion of the hollow body prepared in the first step and foamed to form a foam having open cells, or the hollow body has heat resistance and is continuous.
- the hollow portion in the second step of introducing and solidifying an inorganic foam having bubbles, after the foam is solidified in the second step, or during the solidification of the foam in the second step. It is provided with a third step of vacuuming.
- the above manufacturing method is a concept including the case of introducing both a foaming agent and a foam. Therefore, the above-mentioned production method includes introducing a foaming agent which is partially pre-foamed (that is, a part is a foam) and foaming the rest in the hollow portion to form a foam having open cells. It's a waste. Further, the above-mentioned production method includes a case where one substance foaming agent has already been foamed and another substance foams in the hollow portion when two different foaming agents are introduced.
- the vacuum heat insulating body according to the present invention has heat resistance of enough to withstand a flame at 781 ° C. for 20 minutes or more, and spreads between a hollow body having a hollow portion formed inside and the hollow portion of the hollow body.
- the hollow portion is evacuated to include the heat-resistant inorganic foam formed by forming open cells and foaming and solidifying.
- a method for manufacturing a vacuum heat insulating body and a vacuum heat insulating body capable of ensuring fire resistance, shape stability, and heat insulating property.
- FIG. 1 It is sectional drawing which shows an example of the vacuum insulation body which concerns on 1st Embodiment of this invention. It is a process diagram which shows the manufacturing method of the vacuum insulation panel which concerns on 1st Embodiment, (a) shows a preparation process, (b) shows a hollow body manufacturing process, (c) shows a foaming agent introduction process, (D) shows a vacuum solidification process, and (e) shows a coating process. It is sectional drawing which shows an example of the vacuum insulation panel which concerns on 2nd Embodiment.
- FIG. 1 is a cross-sectional view showing an example of a vacuum heat insulating body according to the first embodiment of the present invention.
- the panel-shaped vacuum heat insulating panel will be described as an example of the vacuum heat insulating body, but the vacuum heat insulating body is not limited to the panel shape, but may have other shapes such as a cylindrical shape. There may be.
- the vacuum heat insulating panel (vacuum heat insulating body) 1 according to the example shown in FIG. 1 includes a hollow body 10 and an inorganic foam 20.
- the hollow body 10 is formed by processing a plurality of (two) metal plates 11 and 12 to form a hollow portion H inside. Each of the metal plates 11 and 12 is processed so as to form a recess. The hollow body 10 is combined so that the recesses of the metal plates 11 and 12 match each other, and the portions other than the recesses are integrated (sealed on the outer circumference) via the joint portion 13, so that the hollow portion H Is formed.
- the joint portion 13 is formed by seam welding or diffusion joining.
- the metal plates 11 and 12 have a heat resistance of 20 minutes or more with respect to a flame of 781 ° C., preferably a heat resistance of 30 minutes or more with a flame of 843 ° C., and more preferably a flame of 902 ° C. On the other hand, it has heat resistance (heat resistance that does not dissolve) that can withstand 45 minutes or more.
- the metal plates 11 and 12 are made of, for example, stainless steel. Further, the metal plates 11 and 12 have a plate thickness of 0.1 mm or more and 2.0 mm or less, preferably 0.1 mm or more and 0.5 mm or less.
- the vacuum heat insulating panel 1 when used for construction, it is considered that at least 0.1 mm thickness is required in consideration of the piercing strength required for safety during construction and use. Further, it is considered necessary to have a thickness of 2.0 mm or less, more preferably 0.5 mm or less, due to the handling as a building material and the limitation of the load capacity of the building.
- the foam 20 is foamed and solidified by forming open cells.
- the foam 20 is composed of an inorganic substance, and in the present embodiment, the thickness is, for example, about several cm or more.
- a foam 20 has a heat resistance of 20 minutes or more to withstand a flame of 781 ° C., preferably a heat resistance of 30 minutes or more to a flame of 843 ° C., more preferably 902. It has heat resistance that can withstand a flame of ° C for 45 minutes or more. This heat resistance means heat resistance that does not burn and shrink and does not generate outgas.
- the foam 20 is composed of, for example, foamed glass, pearlite powder, vermiculite, fumed silica, diatomaceous earth, calcium silicate and the like. It is preferable that the foam 20 is foamed in the hollow portion H and spreads to every corner in the hollow portion H. In addition, the foam 20 is solidified by means such as pressing, and the foam 20 may be spread to every corner in the hollow portion H by this pressing.
- the vacuum heat insulating panel 1 When the vacuum heat insulating panel 1 is used for construction (for example, a required life of about 50 years), it is preferable to use a foam 20 that does not decompose and deteriorate for 50 years and does not generate outgas. Further, the foam 20 has a specific gravity of 0.7 or less, preferably 0.5 or less, and more preferably 0.2 or less due to the weight limitation even for construction.
- the hollow portion H is evacuated.
- the foam 20 in the hollow portion H forms open cells, the inside of the open cells is evacuated by vacuuming to exhibit heat insulating properties.
- FIG. 2 is a process diagram showing a manufacturing method of the vacuum heat insulating panel 1 according to the first embodiment, (a) shows a preparation step, (b) shows a hollow body manufacturing process, and (c) is a foaming agent. The introduction step is shown, (d) shows the vacuum solidification step, and (e) shows the coating step.
- metal plates 11 and 12 such as stainless steel having a plate thickness of 0.1 mm or more and 2.0 mm or less are prepared, and the joint portion 13 is formed by seam welding or diffusion joining. As a result, a flat plate-shaped laminated body S in which the metal plates 11 and 12 are integrated via the joint portion 13 can be obtained.
- the flat plate-shaped laminated body S is put into a mold (not shown).
- the inside of the mold is heated, and is near the foaming temperature of the foaming agent for obtaining the foam 20 shown in FIG. 1 (particularly, when the foaming agent is a mixture of two or more kinds, it is near the foaming temperature of at least one component).
- the metal plates 11 and 12 are in a high temperature environment below the melting point (for example, 800 ° C. or higher and 1000 ° C. or lower).
- the vicinity of the foaming temperature refers to a temperature 200 ° C. or higher lower than the foaming temperature.
- argon gas or the like is sent between the metal plates 11 and 12 (gap).
- the mold has a mold structure so that the hollow body 10 having the shape shown in FIG. 2B can be obtained.
- the gas pressure may be applied by continuously feeding a gas such as argon, or may be applied by sealing the hollow portion H after feeding a predetermined amount of a gas such as argon.
- the foaming agent having the above heat resistance (including a partially foamed one) is introduced into the hollow portion H under the high temperature environment (second step).
- An appropriate foaming agent has been selected, and after introduction into the hollow portion H, it foams so as to form open cells in a high temperature environment to become a foam 20 (if a part of the foam is already foamed, the balance is high temperature).
- the foam 20 is formed as a whole by foaming so as to form open cells depending on the environment).
- the foam 20 spreads to every corner of the hollow portion H by foaming in the hollow portion H. As a result, the intermediate I shown in FIG. 2C is produced.
- the foaming agent introduction step if the temperature in the mold does not reach the foaming temperature of the foaming agent, the temperature is raised to the foaming temperature. Further, when introducing the foaming agent, it is preferable that the hollow portion H is evacuated and the foaming agent is drawn into the hollow portion H by utilizing the vacuum state. This is because the foaming agent can be easily introduced into every corner of the hollow portion H. In addition, a foamed foam 20 having open cells formed may be introduced instead of the foaming agent.
- the vacuum solidification step shown in FIG. 2D pressing is performed from the outside of the metal plates 11 and 12 so as to compress the foam 20 (second step). After sufficient pressing is performed to solidify the foam 20, vacuuming is performed to evacuate the inside of the open cells (third step).
- the gas introduction hole (not shown) used for feeding the gas in the intermediate manufacturing step of FIG. 2 (b) and the foaming agent in the foaming agent introduction step shown in FIG. 2 (c) are used. This is done using the foaming agent introduction holes (not shown) used for the introduction. Further, after evacuation, the gas filling hole (evacuation hole) or the like is sealed by an appropriate means.
- glaze powder for enamel is fused to at least a part of the outer surfaces of the metal plates 11 and 12 in a high temperature state (at a melting temperature equal to or higher than the heat resistant temperature).
- Surface treatment material is sprayed.
- the glaze is melted at about 900 ° C. (melting temperature), fused to the outer surfaces of the metal plates 11 and 12, and then cooled to form a strong heat-resistant coating film. Therefore, in the coating step, after the foam 20 is solidified, the glaze is fused by spraying the metal plates 11 and 12 in a state where the outer surface is 900 ° C. or higher (fourth step).
- the trouble of putting the metal plates 11 and 12 together in the furnace and reheating is omitted.
- evacuation is performed after the foam 20 is solidified, but it is preferable that the vacuum is performed during the solidification of the foam 20.
- some open cells are separated by the external force to become closed cells.
- the inside of the cells cannot be evacuated by evacuation. Therefore, by performing vacuuming in the state of open cells during solidification, even if some of the open cells later become closed cells, the closed cells can also be evacuated to improve heat insulation. Can be done.
- the foam 20 is solidified by pressing from the outside of the metal plates 11 and 12, but the present invention is not limited to this, and the foam 20 may be solidified by the following three methods.
- a foaming agent that forms open cells during foaming for example, pearlite powder (powder that becomes pearlite powder after foaming)
- a foaming agent that forms closed cells during foaming for example, powder
- the foaming agent that forms closed cells has a higher viscosity at the foaming temperature than the foaming agent that forms open cells. That is, it is made into a sticky state by this highly viscous foaming agent, and is cooled and solidified as it is to be solidified.
- the second method is an inorganic heat resistance of an adhesive that does not foam at the foaming temperature of the foaming agent and has heat resistance (for example, Aron Ceramic (registered trademark) manufactured by Toa Synthetic Co., Ltd.) together with the foaming agent in the foaming agent introduction step.
- Adhesive is introduced. That is, the foam 20 is solidified by utilizing the adhesive force of the adhesive.
- the foaming agent introduction step for example, a powder that is fluidized at a temperature equal to or higher than the heat resistant temperature (the temperature related to the heat resistance) together with the foaming agent that forms open cells at the time of foaming or the foam 20 having the open cells. It is to introduce a thermoplastic material (fusing material) such as glass.
- a thermoplastic material such as glass.
- the temperature is further increased to fluidize the thermoplastic material. Then, by cooling after that, the foams 20 are bound to each other and solidified.
- the hollow body 10 and the foam 20 have heat resistance of enough to withstand a flame of 781 ° C. for 20 minutes or more.
- the vacuum heat insulating panel 1 having excellent fire resistance can be obtained.
- a stable shape can be obtained by introducing an inorganic foaming agent into the hollow portion H and foaming to form and solidify the foam 20 or by introducing the foam 20 and solidifying it. it can.
- foaming the foaming agent so as to form open cells, or by introducing the foam 20 having open cells and evacuating the inside of the bubbles can be evacuated to exhibit heat insulating properties. it can. Therefore, it is possible to provide a method for manufacturing the vacuum heat insulating panel 1 which can secure fire resistance, shape stability, and heat insulating property.
- the hollow body 10 is obtained by processing a plurality of laminated metal plates 11 and 12 having a plate thickness of 0.1 mm or more and 2.0 mm or less, the shape stability can be improved depending on the plate thickness.
- a plurality of metal plates 11 and 12 are processed in a high temperature environment to prepare (manufacture) a hollow body 10 having a hollow portion H, and a foaming agent is applied to the hollow portion H in the state of being in this high temperature environment. Introduce. Therefore, it is easy to create the hollow body 10 by processing the metal plates 11 and 12 in a situation where the breaking elongation of the metal is improved in a high temperature environment. Further, since the foaming agent is introduced in the high temperature environment, the foaming agent can be foamed as it is, which can contribute to the smooth production of the vacuum heat insulating panel 1.
- a plurality of metal plates 11 and 12 are processed in a high temperature environment to prepare (manufacture) a hollow body 10 having a hollow portion H, and fusion with a foaming agent or a foam 20 to be fluidized at a heat resistant temperature or higher.
- a foaming agent or a foam 20 to be fluidized at a heat resistant temperature or higher.
- the foam 20 when an external force is applied to the foam 20 to solidify it, it can be solidified by pressing with a press, for example, to exhibit higher shape stability.
- the adhesive force of the adhesive can be used to improve the shape stability.
- a surface treatment material that fuses at a fusion temperature equal to or higher than the heat resistant temperature is sprayed onto at least a part of the outer surface of the hollow body 10 that maintains the fusion temperature or higher after the foam 20 is solidified. Therefore, the surface treatment of enamel or the like can be performed by spraying while the hollow body 10 is maintained at the fusion temperature or higher, which is more time-consuming than the case where the surface treatment is performed after the hollow body 10 is cooled. It can be omitted. Further, since the surface treatment material is fused at a heat resistant temperature or higher, heat resistant coating can be applied.
- the foaming agent or the foam 20 when the foaming agent or the foam 20 is introduced into the hollow portion H, when the hollow portion H is evacuated, the foaming agent or the foam 20 can be drawn by using the vacuum, and the hollow portion H can be drawn. The foaming agent and the foam 20 can be distributed to every corner.
- the vacuum heat insulating panel 1 since the hollow body 10 and the foam 20 have heat resistance of enough to withstand a flame of 781 ° C. for 20 minutes, the vacuum heat insulating body has excellent fire resistance. It can be panel 1. Further, since the foam 20 is spread over the hollow portion H of the hollow body 10 and is solidified, a stable shape can be obtained. In addition, since the foam 20 is foamed by forming open cells and the hollow portion H is evacuated, the inside of the open cells can be used as a vacuum portion to exhibit heat insulating properties. Therefore, it is possible to provide the vacuum heat insulating panel 1 capable of ensuring fire resistance, shape stability, and heat insulating property.
- the foaming agent that forms closed cells for example, foamed glass of powder glass and foaming aid
- the foaming temperature of the foaming agent that forms open cells for example, pearlite powder
- the foaming temperature may be adjusted as appropriate.
- the process can be simplified by adjusting the foaming temperature by selecting the glass type and foaming aid, mixing ratio, etc., or by lowering the foaming glass first and then foaming the pearlite powder to destroy the closed cells of the glass. Can be done.
- the fluidization temperature of the thermoplastic material may be appropriately adjusted with respect to the foaming temperature of the foaming agent forming open cells.
- the foaming agent for example, pearl rock powder
- the foaming agent foams by matching the foaming temperature and the fluidization temperature to simplify the process, or by setting the fluidization temperature higher than the foaming temperature, it is in a solid powder state and does not interfere with the foaming. After the temperature is further raised, it can be fluidized to exhibit adhesiveness.
- the hollow glass according to the second embodiment and the manufacturing method thereof are the same as those of the first embodiment, but some configurations and methods are different. Hereinafter, the differences from the first embodiment will be described.
- FIG. 3 is a cross-sectional view showing an example of the vacuum heat insulating panel (vacuum heat insulating body) 2 according to the second embodiment.
- the vacuum heat insulating panel 2 according to the second embodiment is the same as the first embodiment in that the two metal plates 11 and 12 are sealed on the outer circumference via the joint portion 13. Further, it is different from that of the first embodiment in that a third metal plate 14 is provided.
- the third metal plate 14 is integrated with the inner portion of one metal plate 12 via a joint portion 15.
- the joints 15 are formed at a plurality of spots along the longitudinal direction of the vacuum heat insulating panel 2.
- the joint portion 15 is also formed by seam welding or diffusion joining.
- the third metal plate 14 is wavy in cross section, for example, and forms a second hollow portion H2 with one metal plate 12.
- the second hollow portion H2 may be evacuated or may be filled with gas. Further, a latent heat storage material or the like may be charged into the second hollow portion H2.
- FIG. 4 is a process diagram showing a manufacturing method of the vacuum heat insulating panel 2 according to the second embodiment, (a) shows a preparation step, (b) shows a hollow body manufacturing process, and (c) is a foaming agent. The introduction step is shown, and (d) shows the vacuum solidification step. In FIG. 4, the painting process is not shown.
- the metal plates 11, 12, and 14 are prepared, and the joint portions 13, 15 are formed by seam welding or diffusion joining. As a result, a flat plate-shaped laminated body S is obtained.
- the hollow body 10 is manufactured in the hollow body manufacturing process shown in FIG. 4 (b) (first step). This step is the same as that described with reference to FIG. 2 (b). After that, Intermediate I is produced in the foaming agent introduction step shown in FIG. 4 (c). This step is also the same as that described with reference to FIG. 2 (c).
- argon gas or the like is sent into the gap between one metal plate 12 and the third metal plate 14.
- gas pressure is applied to the gaps between the metal plates 12 and 14 to expand the internal space, and the second hollow portion H2 shown in FIG. 4D is formed.
- the foam 20 is pressed by the formation of the second hollow portion H2, and the foam 20 is solidified (second step). Further, even if there is a portion in the hollow portion H where the foam 20 is not distributed, it can be distributed by this pressing.
- the hollow portion H is evacuated to evacuate the inside of the open cell (third step). After evacuation, the hollow portion H is sealed by an appropriate means. The evacuation may be performed on the second hollow portion H2 after cooling to some extent.
- the foam 20 in the hollow portion H is pressed and solidified, so that the foam 20 is further spread to every corner in the hollow portion H. Can be made.
- the hollow body 10 is composed of a plurality of metal plates 11, 12, and 14, but is not limited to this, and is formed of another material such as a glass material as long as it has heat resistance. You may be. Further, the number of the metal plates 11, 12, and 14 is not limited to two or three, and may be four or more.
- the hollow body 10 is manufactured by applying gas pressure to a plurality of metal plates 11, 12, and 14, but the present invention is not limited to this, and for example, a deep-drawn metal plate can be used.
- the hollow body 10 may be formed by combining them.
- the foaming agent is not limited to the case where the entire amount is introduced into the hollow portion H in an unfoamed state, and a part of the foaming agent may be introduced into the hollow portion H in a foamed state, or the entire amount is a foamed foam. It may be introduced into the hollow portion H in the state of 20.
- the present invention it is possible to provide a method for manufacturing a vacuum heat insulating body and a vacuum heat insulating body capable of ensuring fire resistance, shape stability, and heat insulating property.
- the present invention exhibiting this effect is useful with respect to a method for producing a vacuum insulation body and a vacuum insulation body.
- Vacuum insulation panel (vacuum insulation) 10 Hollow body 11, 12, 14: Metal plate 13, 15: Joint part 20: Foam body H: Hollow part H2: Second hollow part I: Intermediate body S: Laminated body
Abstract
Description
また、以下に示す実施形態においては、一部構成の図示や説明を省略している箇所があるが、省略された技術の詳細については、以下に説明する内容と矛盾点が発生しない範囲内において、適宜公知又は周知の技術が適用されていることはいうまでもない。
なお、真空引きは、例えば図2(b)の中間体製造工程においてガスを送り込むために使用されたガス導入孔(不図示)や、図2(c)に示す発泡剤導入工程において発泡剤を導入するために使用された発泡剤導入孔(不図示)を利用して行われる。また、真空引き後、ガス封入孔(真空引き孔)等は適宜の手段によって封止される。
さらに、第3の金属板14は例えば断面視して波状となっており一方の金属板12との間に第2中空部H2を形成している。この第2中空部H2は、真空引きされてもよいし、ガスが封入等されていてもよい。さらに、第2中空部H2は潜熱蓄熱材等が投入されてもよい。
10 :中空体
11,12,14 :金属板
13,15 :接合部
20 :発泡体
H :中空部
H2 :第2中空部
I :中間体
S :積層体
Claims (10)
- 781℃の炎に対して20分間耐える程度以上の耐熱性を有し、内部に中空部が形成された中空体を用意する第1工程と、
前記第1工程において用意された前記中空体の前記中空部に前記耐熱性を有する無機の発泡剤を導入して発泡させ連続気泡を有する発泡体を形成のうえ、又は、前記耐熱性を有すると共に連続気泡を有した無機の発泡体を導入のうえ、固化させる第2工程と、
前記第2工程において前記発泡体が固化された後に、又は、前記第2工程における前記発泡体の固化中に、前記中空部を真空引きする第3工程と、
を有する真空断熱体の製造方法。 - 前記第1工程では、板厚0.1mm以上2.0mm以下となる積層された複数枚の金属板を加工して前記中空部を有した前記中空体を製造して用意する
請求項1に記載の真空断熱体の製造方法。 - 前記第1工程では、前記複数枚の金属板を前記発泡剤の少なくとも一部の発泡温度より200℃低い温度以上となる高温環境下で加工して前記中空部を有した前記中空体を製造して用意し、
前記第2工程では、前記高温環境下のままの状態で、前記中空部に前記発泡剤を導入させる
請求項2に記載の真空断熱体の製造方法。 - 前記第2工程では、発泡時に連続気泡を形成する前記発泡剤又は連続気泡を有した前記発泡体と、781℃の耐熱温度以上の温度で流動化する融着材とが導入され、
前記第1工程では、前記複数枚の金属板を前記融着材の流動化温度より200℃低い温度以上となる高温環境下で加工して前記中空部を有した前記中空体を製造して用意する
請求項2に記載の真空断熱体の製造方法。 - 前記第2工程では、前記発泡体に外力を付与して固化させる
請求項1から請求項4のいずれか1項に記載の真空断熱体の製造方法。 - 前記第2工程では、発泡時に連続気泡を形成する発泡剤と、発泡時に独立気泡を形成する発泡剤との混合物が導入される
請求項1から請求項4のいずれか1項に記載の真空断熱体の製造方法。 - 前記第2工程では、前記発泡剤と共に、前記発泡剤の発泡温度で発泡せずかつ耐熱性を有する接着剤が導入される
請求項1から請求項4のいずれか1項に記載の真空断熱体の製造方法。 - 781℃の耐熱温度以上の溶融温度で溶融する表面処理材料を、前記第2工程において前記発泡体が固化された後に前記溶融温度以上を維持している前記中空体の外表面の少なくとも一部に施す第4工程をさらに有する
請求項1から請求項7のいずれか1項に記載の真空断熱体の製造方法。 - 前記第2工程では、前記発泡剤又は前記発泡体の導入にあたり前記中空部が真空引きされている
請求項1から請求項8のいずれか1項に記載の真空断熱体の製造方法。 - 781℃の炎に対して20分間耐える程度以上の耐熱性を有し、内部に中空部が形成された中空体と、
前記中空体の前記中空部内に行き渡り、連続気泡を形成して発泡固化された前記耐熱性を有する無機の発泡体と、を備え、
前記中空部が真空引きされている
真空断熱体。
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CN202080044053.7A CN114096390A (zh) | 2019-06-19 | 2020-05-18 | 真空绝热体的制造方法和真空绝热体 |
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