JPWO2016030929A1 - Cooling roll and manufacturing method thereof - Google Patents

Cooling roll and manufacturing method thereof Download PDF

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JPWO2016030929A1
JPWO2016030929A1 JP2016545091A JP2016545091A JPWO2016030929A1 JP WO2016030929 A1 JPWO2016030929 A1 JP WO2016030929A1 JP 2016545091 A JP2016545091 A JP 2016545091A JP 2016545091 A JP2016545091 A JP 2016545091A JP WO2016030929 A1 JPWO2016030929 A1 JP WO2016030929A1
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cooling
cylindrical body
roll
cooling roll
peripheral surface
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JP6341489B2 (en
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智博 元村
智博 元村
賀昭 徳田
賀昭 徳田
知史 小川
知史 小川
小林　智樹
智樹 小林
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Sasakura Engineering Co Ltd
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Sasakura Engineering Co Ltd
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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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/46—Rollers
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/08—Metallic material containing only metal elements
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/02—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by influencing fluid boundary
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00—Elements specially adapted for movement
    • F28F5/02—Rotary drums or rollers

Abstract

内部に複数の冷却管８が配設された円筒体２内に、蒸発と凝縮とを繰り返す作動流体を封入してなる冷却ロール１において、前記円筒体２の内周面に金属皮膜９が形成される。In a cooling roll 1 in which a working fluid that repeats evaporation and condensation is enclosed in a cylindrical body 2 in which a plurality of cooling pipes 8 are disposed, a metal film 9 is formed on the inner peripheral surface of the cylindrical body 2. Is done.

Description

本発明は、冷却ロール及びその製造方法に関し、更に詳しくは、合成樹脂等の各種シートや各種フィルムの製造装置、あるいは、これら各種シートや各種フィルムを積層するラミネート装置等に使用される冷却ロール及びその製造方法に関する。   The present invention relates to a cooling roll and a manufacturing method thereof, and more specifically, a manufacturing apparatus for various sheets such as synthetic resins and various films, a laminating apparatus used for laminating these various sheets and various films, and the like. It relates to the manufacturing method.

一般に、紙等の基材に対して合成樹脂フィルムを貼り合せるラミネート製造装置では、例えば、図１０に示すように、供給ロール２１から繰り出された基材２２を、プレスロール２３と冷却ロール２４との間を通過させ、巻き取りロール２５に巻き取らせる一方、プレスロール２３と冷却ロール２４との間に、ダイ２６から溶融樹脂を流下させてフィルム層２８を形成し、冷却ロール２４にて冷却しながら基材２２に貼合わせて、ラミネート積層紙２９を製造している。   In general, in a laminate manufacturing apparatus that bonds a synthetic resin film to a base material such as paper, for example, as shown in FIG. 10, a base material 22 fed out from a supply roll 21 is a press roll 23 and a cooling roll 24. Between the press roll 23 and the cooling roll 24, the molten resin is allowed to flow down from the die 26 to form a film layer 28, and the cooling roll 24 cools the molten resin. The laminated laminated paper 29 is manufactured by laminating the base material 22.

上記冷却ロール２４として、例えば、特許文献１には、多数本の冷却用の伝熱管が内部に配設された円筒体内に、作動流体（熱搬送液）を封入し、回転駆動される前記円筒体内における作動流体の蒸発と凝縮との繰り返しによって前記円筒体の表面を冷却する構成が開示されている。   As the cooling roll 24, for example, in Patent Document 1, a working fluid (heat carrier liquid) is sealed in a cylinder in which a large number of cooling heat transfer tubes are disposed, and the cylinder is driven to rotate. The structure which cools the surface of the said cylindrical body by repetition of evaporation and condensation of the working fluid in a body is disclosed.

更に、作動流体が封入される円筒体の内面には、ウィックを張設して温度の均一化を図って一様に冷却できるようにしている。   Further, a wick is stretched on the inner surface of the cylindrical body in which the working fluid is sealed so that the temperature can be made uniform so that it can be cooled uniformly.

特公平０４−２７２０号公報Japanese Patent Publication No. 04-2720

上記のような冷却ロールでは、更なる冷却能力の向上が要求されており、本発明は、冷却能力を向上させた冷却ロール及びその製造方法を提供することを目的とする。   The cooling roll as described above is required to further improve the cooling capacity, and an object of the present invention is to provide a cooling roll having an improved cooling capacity and a method for manufacturing the same.

上記目的を達成するために、本発明の冷却ロールは、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールにおいて、前記円筒体の内周面に金属皮膜が形成される。   In order to achieve the above object, a cooling roll according to the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a working fluid that repeats evaporation and condensation is contained in the cylindrical body. In the cooling roll to be sealed, a metal film is formed on the inner peripheral surface of the cylindrical body.

前記金属皮膜は、溶射加工によって形成される溶射皮膜であるのが好ましい。   The metal coating is preferably a thermal spray coating formed by thermal spraying.

前記金属皮膜は、Ａｌ皮膜であるのが好ましい。   The metal film is preferably an Al film.

本発明の冷却ロールによれば、円筒体の内周面にＡｌ皮膜等の金属皮膜を、溶射加工等によって形成するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。   According to the cooling roll of the present invention, since a metal film such as an Al film is formed on the inner peripheral surface of the cylindrical body by thermal spraying or the like, the boiling heat transfer coefficient is applied to the inner peripheral surface of the cylindrical body as described later. Compared to the conventional example in which wicking is performed, it is possible to increase the cooling efficiency.

本発明の冷却ロールの製造方法は、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールの製造方法において、前記円筒体の内周面に金属皮膜を溶射加工によって形成する。   The manufacturing method of the cooling roll of the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a cooling fluid in which a working fluid that repeats evaporation and condensation is enclosed in the cylindrical body In this manufacturing method, a metal film is formed on the inner peripheral surface of the cylindrical body by thermal spraying.

本発明の冷却ロールの製造方法によれば、円筒体の内周面に、金属皮膜を溶射加工によって形成するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。   According to the cooling roll manufacturing method of the present invention, the metal coating is formed on the inner peripheral surface of the cylindrical body by thermal spraying, so that the boiling heat transfer coefficient is wicked on the inner peripheral surface of the cylindrical body as described later. Therefore, it is possible to increase the cooling efficiency as compared with the conventional example in which the above is applied.

本発明によれば、円筒体の内周面に金属皮膜を形成するので、冷却ロールの冷却効率を高めることができる。   According to the present invention, since the metal film is formed on the inner peripheral surface of the cylindrical body, the cooling efficiency of the cooling roll can be increased.

本発明の実施形態に係る冷却ロールの概略縦断面図である。It is a schematic longitudinal cross-sectional view of the cooling roll which concerns on embodiment of this invention. 図１のＡ−Ａ線の断面図である。It is sectional drawing of the AA line of FIG. 図２の部分拡大断面図である。FIG. 3 is a partially enlarged sectional view of FIG. 2. 冷却ロールを模擬した試験装置の概略構成図である。It is a schematic block diagram of the test device which simulated the cooling roll. 図４の試験装置によって得られた実施例と比較例の沸騰伝熱係数を示す図である。It is a figure which shows the boiling heat transfer coefficient of the Example obtained by the testing apparatus of FIG. 4, and a comparative example. 試験用ロールを用いた試験設備の概略構成図である。It is a schematic block diagram of the test equipment using the roll for a test. 図６の試験用ロール及び加熱ヒータを示す図である。It is a figure which shows the roll for a test of FIG. 6, and a heater. 図６の試験設備によって得られた実施例と比較例の試験用ロールの沸騰伝熱係数を示す図である。It is a figure which shows the boiling heat transfer coefficient of the roll for a test of the Example obtained by the test installation of FIG. 6, and a comparative example. 図６の試験設備によって得られた実施例と比較例の試験用ロールの沸騰伝熱係数を示す図である。It is a figure which shows the boiling heat transfer coefficient of the roll for a test of the Example obtained by the test installation of FIG. 6, and a comparative example. ラミネート積層紙の製造装置の概略図である。It is the schematic of the manufacturing apparatus of laminated laminated paper.

以下、本発明の実施形態を、図面に基づいて詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の一実施形態に係る冷却ロールの概略縦断面図であり、図２は、図１のＡ−Ａ線に沿う断面図であり、図３は、図２の部分拡大断面図である。   1 is a schematic longitudinal sectional view of a cooling roll according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a partially enlarged sectional view of FIG. FIG.

これらの図を参照して、この実施形態の冷却ロール１は、例えば、上記図１０のラミネート製造装置等に使用する冷却ロールである。この冷却ロール１は、比較的薄い板厚の円筒体２と、この円筒体２を支持する中空の支持軸３とを備えている。円筒体２の両端部には、円筒体２の内部を密封する端板１７，１８が固着されており、更に、端板１７，１８より円筒体２の内方には、内部を密封する別の面板４，５が固着されている。   With reference to these figures, the cooling roll 1 of this embodiment is a cooling roll used for the laminate manufacturing apparatus of FIG. 10 etc., for example. The cooling roll 1 includes a cylindrical body 2 with a relatively thin plate thickness and a hollow support shaft 3 that supports the cylindrical body 2. End plates 17 and 18 for sealing the inside of the cylindrical body 2 are fixed to both ends of the cylindrical body 2, and further, the inside of the cylindrical body 2 is sealed to the inside of the cylindrical body 2 from the end plates 17 and 18. The face plates 4 and 5 are fixed.

上記支持軸３が、両端板１７，１８及び両面板４，５の中心を気密状態で貫通し、該支持軸３の両端部３ａ，３ｂが、円筒体２の外方に突出している。   The support shaft 3 passes through the centers of both end plates 17 and 18 and the double-sided plates 4 and 5 in an airtight state, and both end portions 3 a and 3 b of the support shaft 3 protrude outward from the cylindrical body 2.

円筒体２の一端側には、内方の面板４と外方の端板１７とによって、冷却水の入口室６が区画され、中空の支持軸３の一端３ａから供給される冷却水が、矢符で示されるように、入口室６内に導入される。   On one end side of the cylindrical body 2, the cooling water inlet chamber 6 is defined by the inner face plate 4 and the outer end plate 17, and the cooling water supplied from one end 3 a of the hollow support shaft 3 is It is introduced into the entrance chamber 6 as indicated by the arrow.

円筒体２の他端側には、内方の面板５と外方の端板１８とによって、冷却水の出口室７が区画され、この出口室７は、中空の支持軸３の他端３ｂと連通し、矢符で示されるように、冷却水の排出経路が構成される。   On the other end side of the cylindrical body 2, a cooling water outlet chamber 7 is defined by an inner face plate 5 and an outer end plate 18, and this outlet chamber 7 is connected to the other end 3 b of the hollow support shaft 3. As shown by the arrows, a cooling water discharge path is configured.

両面板４，５間には、円筒体２の軸線方向（図１の左右方向）に延びて入口室６及び出口室７にそれぞれ連通する冷却管８の複数本が、円周方向に沿って並設されている。   Between the double-sided plates 4 and 5, a plurality of cooling pipes 8 extending in the axial direction of the cylindrical body 2 (left and right direction in FIG. 1) and communicating with the inlet chamber 6 and the outlet chamber 7, respectively, extend along the circumferential direction. It is installed side by side.

これによって、支持軸３の一端３ａから入口室６内に導入された冷却水が、各冷却管８に分配され、各冷却管８内を流れた冷却水が、出口室７から支持軸３の他端３ｂを介して排出されるように構成されている。   Thereby, the cooling water introduced into the inlet chamber 6 from the one end 3 a of the support shaft 3 is distributed to each cooling pipe 8, and the cooling water flowing in each cooling pipe 8 flows from the outlet chamber 7 to the support shaft 3. It is configured to be discharged through the other end 3b.

両面板４，５で区間された円筒体２の内部は、減圧状態とされると共に、代替フロン、ナフタリン、キノリン等のように蒸発と凝縮とを繰り返すようにした作動流体としての作動液(図示せず)が封入されている。   The inside of the cylindrical body 2 defined by the double-sided plates 4 and 5 is in a reduced pressure state, and a working fluid as a working fluid that repeats evaporation and condensation such as alternative chlorofluorocarbon, naphthalene, and quinoline (see FIG. (Not shown) is enclosed.

この構成において、回転する円筒体２内に封入した作動液は、遠心力によって円筒体２の内周面に接したとき、この円筒体２の外周面に接触する高温の樹脂フィルム等の被冷却シートからの熱によって蒸発し、蒸発した作動液は、各冷却管８への接触によって冷却され、凝縮して液化する。この液化した作動液が、再び、遠心力によって円筒体２の内周面に戻って、被冷却シートからの熱によって蒸発するという、蒸発と凝縮とを繰り返すことによって、被冷却シートの冷却を行う。   In this configuration, when the working fluid sealed in the rotating cylindrical body 2 comes into contact with the inner peripheral surface of the cylindrical body 2 by centrifugal force, a high temperature resin film or the like to be cooled that contacts the outer peripheral surface of the cylindrical body 2 is cooled. The working fluid evaporated by the heat from the sheet is cooled by contact with each cooling pipe 8, and condensed and liquefied. The liquefied hydraulic fluid returns to the inner peripheral surface of the cylindrical body 2 again by centrifugal force, and evaporates by heat from the cooled sheet, thereby repeating the evaporation and condensation, thereby cooling the cooled sheet. .

この実施形態では、冷却効率を高めるために、円筒体２の内周面には、上記特許文献１のようにウィックを張設するのではなく、金属皮膜９を形成している。   In this embodiment, in order to increase the cooling efficiency, a metal film 9 is formed on the inner peripheral surface of the cylindrical body 2 instead of stretching a wick as in Patent Document 1 described above.

この金属皮膜９は、円筒体２の内周面の全面に溶射加工によって形成された溶射皮膜であるのが好ましい。この金属皮膜９の膜厚は、１ｍｍ以下であるのが好ましく、より好ましくは、５００μｍ以下であり、更に好ましくは、１００〜４００μｍ、この実施形態では、２５０μｍ程度としている。この膜厚が、１ｍｍを超えると、十分な伝熱率の向上が見られない。   The metal coating 9 is preferably a sprayed coating formed by spraying on the entire inner peripheral surface of the cylindrical body 2. The thickness of the metal film 9 is preferably 1 mm or less, more preferably 500 μm or less, still more preferably 100 to 400 μm, and in this embodiment, about 250 μm. When this film thickness exceeds 1 mm, a sufficient improvement in heat transfer rate is not observed.

金属皮膜９の材料は、金属やその合金であれば、その種類は特に限定されないが、溶射材料として使用される、例えば、Ａｌ、Ａｌ合金、ＳＵＳ、亜鉛などが好ましい。   The material of the metal film 9 is not particularly limited as long as it is a metal or an alloy thereof, but Al, Al alloy, SUS, zinc or the like used as a thermal spray material is preferable.

金属皮膜９を形成するための溶射加工の方法は、特に限定されないが、例えばアークワイヤー溶射を挙げることができ、この実施形態の金属皮膜９は、アークワイヤー溶射によって形成されたＡｌの溶射皮膜である。   The method of thermal spraying for forming the metal coating 9 is not particularly limited, and examples thereof include arc wire spraying. The metal coating 9 of this embodiment is an Al thermal spray coating formed by arc wire spraying. is there.

金属皮膜９は、溶射加工によって形成された溶射皮膜であるので、気孔を有しており、作動流体を、気孔内に保持することができる。したがって、作動液を円筒体２の内周面の金属皮膜９の気孔に保持することができ、これによって、円筒体２の外周面を均一に冷却することができる。この気孔率は、３％以上であるのが好ましく、より好ましくは、５％以上である。   Since the metal coating 9 is a thermal spray coating formed by thermal spraying, it has pores and can hold the working fluid in the pores. Therefore, the hydraulic fluid can be held in the pores of the metal film 9 on the inner peripheral surface of the cylindrical body 2, whereby the outer peripheral surface of the cylindrical body 2 can be cooled uniformly. This porosity is preferably 3% or more, and more preferably 5% or more.

次に、本発明の作用効果を、実施例及び比較例に基づいて説明する。   Next, the effect of this invention is demonstrated based on an Example and a comparative example.

実施例は、試験片の表面(沸騰表面)に、上記実施形態と同様にアークワイヤー溶射加工によってＡｌの金属皮膜を膜厚２５０μｍ程度形成した。   In the example, an Al metal film having a thickness of about 250 μm was formed on the surface of the test piece (boiling surface) by arc wire spraying as in the above embodiment.

比較例は、試験片の表面(沸騰表面)に、ウィック加工を施した。このウィック加工は、本件出願人が、市販している従来の冷却ロールと同じウィック加工である。   In the comparative example, the surface of the test piece (boiling surface) was subjected to wicking. This wicking process is the same wicking process as that of the conventional cooling roll marketed by the applicant.

実施例及び比較例の試験片の沸騰伝熱係数を、図４に示される冷却ロールを模擬した試験装置によって測定した。   The boiling heat transfer coefficients of the test pieces of Examples and Comparative Examples were measured by a test apparatus that simulated the cooling roll shown in FIG.

図４において、１０は沸騰容器、１１は試験片、１２は凝縮器、１３は作動液用の熱電対、１４はヒータ、１５は試験片用の熱電対、１６は作動液である。作動液１６は、Ｒ−１２３の代替フロンを使用し、次のような手順でそれぞれ測定行った。   In FIG. 4, 10 is a boiling vessel, 11 is a test piece, 12 is a condenser, 13 is a thermocouple for hydraulic fluid, 14 is a heater, 15 is a thermocouple for test strip, and 16 is a hydraulic fluid. The hydraulic fluid 16 was measured by the following procedure using an alternative freon of R-123.

沸騰容器１０内を真空状態とし、作動液１６を３０〜６０ｍｌ封入する。ヒータ１４で試験片１１をその裏面側から加熱し、試験片１１の沸騰表面から作動液１６を沸騰させて蒸発させながら、沸騰容器１０内の圧力を正圧まで上昇させ、沸騰容器１０の上部に溜まった不凝縮ガスを抜いて、沸騰容器１０内を密閉する。   The inside of the boiling vessel 10 is evacuated and 30 to 60 ml of the working fluid 16 is sealed. While the test piece 11 is heated from the back side by the heater 14 and the working liquid 16 is boiled and evaporated from the boiling surface of the test piece 11, the pressure in the boiling vessel 10 is increased to a positive pressure, and the upper portion of the boiling vessel 10 is The non-condensable gas accumulated in is removed and the inside of the boiling vessel 10 is sealed.

その後、冷却水を循環させ、平衡状態になったところで、冷却水の入口、出口及び試験片１１の温度を測定した。作動液１６の深さは沸騰状態で約１５ｍｍとした。   Thereafter, the cooling water was circulated, and when the equilibrium was reached, the temperatures of the cooling water inlet and outlet and the test piece 11 were measured. The depth of the working fluid 16 was about 15 mm in a boiling state.

沸騰伝熱係数は、熱流束（ヒートフラックス）に対する沸騰伝熱係数であり、試験片１１の沸騰表面の温度は、各点に設置した熱電対１５の温度差により求めた。熱流束(ヒートフラックス)及び沸騰伝熱係数は以下の式（１）（２）を使用して求めた。   The boiling heat transfer coefficient is a boiling heat transfer coefficient with respect to the heat flux (heat flux), and the temperature of the boiling surface of the test piece 11 was obtained from the temperature difference of the thermocouple 15 installed at each point. The heat flux (heat flux) and the boiling heat transfer coefficient were determined using the following equations (1) and (2).

ｑ＝Ｖ×Ｃｐｗ×ρｗ×（Ｔｗ´−Ｔｗ）／Ａ …（１）
ｈｂ＝ｑ÷（Ｔｓ−Ｔｌ） …（２）
なお、上記式（１）（２）において、ｑは熱流束[ｋｃａｌ／ｍ2ｈ]、Ｖは冷却水量「ｍ3／ｈ」、Ｃｐｗは冷却水の比熱[ｋｃａｌ／ｋｇ℃]、ρｗは冷却水の密度[ｋｇ／ｍ3]、Ｔｗ´は冷却水の出口温度[℃]、Ｔｗは冷却水の入口温度[℃]、Ａは作動液の沸騰伝熱面積[ｍ2]、ｈｂは作動液の沸騰伝熱係数[ｋｃａｌ／ｍ2ｈ℃]、Ｔｓは沸騰表面温度[℃]、Ｔｌは作動液温度[℃]である。q = V × Cpw × ρw × (Tw′−Tw) / A (1)
hb = q ÷ (Ts−Tl) (2)
In the above formulas (1) and (2), q is the heat flux [kcal / m 2 h], V is the amount of cooling water “m 3 / h”, Cpw is the specific heat of cooling water [kcal / kg ° C.], and ρw is Cooling water density [kg / m 3 ], Tw ′ is cooling water outlet temperature [° C.], Tw is cooling water inlet temperature [° C.], A is the boiling heat transfer area of hydraulic fluid [m 2 ], hb is The boiling heat transfer coefficient [kcal / m 2 h ° C.] of the hydraulic fluid, Ts is the boiling surface temperature [° C.], and Tl is the hydraulic fluid temperature [° C.].

上記手順により測定した結果を図５に示す。図５において、実線は実施例を、破線は比較例をそれぞれ示している。   The results measured by the above procedure are shown in FIG. In FIG. 5, the solid line indicates an example, and the broken line indicates a comparative example.

図５に示すように、実施例の試験片の沸騰伝熱係数が、比較例の試験片の沸騰伝熱係数を上回っている。   As shown in FIG. 5, the boiling heat transfer coefficient of the test piece of the example exceeds the boiling heat transfer coefficient of the test piece of the comparative example.

このように、表面にアークワイヤー溶射加工によってＡｌの金属皮膜を膜厚２５０μｍ程度形成した実施例の試験片は、表面に、本件出願人が市販している従来の冷却ロールと同じウィック加工を施した比較例の試験片に比べて、沸騰伝熱係数が向上し、冷却効率が向上していることが分る。   Thus, the test piece of the example in which an Al metal film was formed on the surface by arc wire spraying to a thickness of about 250 μm was subjected to the same wick processing on the surface as a conventional cooling roll marketed by the applicant. It can be seen that the boiling heat transfer coefficient is improved and the cooling efficiency is improved as compared with the comparative test piece.

更に、試験用ロールとして、実施例及び比較例の冷却ロールを製作し、各冷却ロールについて、沸騰伝熱係数を測定した。   Furthermore, the cooling roll of the Example and the comparative example was manufactured as a roll for a test, and the boiling heat transfer coefficient was measured about each cooling roll.

実施例の冷却ロールは、円筒体の内周面に、上記実施形態と同様にアークワイヤー溶射加工によってＡｌの金属皮膜を膜厚２５０μｍ程度形成した。   In the cooling roll of the example, an Al metal film having a film thickness of about 250 μm was formed on the inner peripheral surface of the cylindrical body by arc wire spraying as in the above embodiment.

比較例の冷却ロールは、円筒体の内周面に、ウィック加工を施した。このウィック加工は、本件出願人が、市販している従来の冷却ロールと同じウィック加工である。   The cooling roll of the comparative example performed wick processing on the inner peripheral surface of the cylindrical body. This wicking process is the same wicking process as that of the conventional cooling roll marketed by the applicant.

実施例及び比較例の冷却ロールの沸騰伝熱係数を、２種類の作動液である代替フロンＲ−１２４，Ｒ−１３４ａをそれぞれ用いて、図６に示される試験設備で沸騰伝熱係数を測定した。   The boiling heat transfer coefficient of the cooling rolls of the example and the comparative example was measured with the test equipment shown in FIG. 6 using the two types of alternative chlorofluorocarbons R-124 and R-134a. did.

図６において、３０は実施例または比較例の冷却ロールである試験用ロール、３１，３２は試験用ロール３０への冷却水の入口及び出口の温度をそれぞれ計測する第１，第２温度計、３３は冷却水の流量を計測する流量計、３４は冷却水ポンプ、３５は試験用ロール３０を回転駆動するモータ、３７〜４１は試験用ロール３０の表面温度を、その軸線方向（図６の左右方向）に沿う異なる位置でそれぞれ計測する第１〜第５表面温度計である。   In FIG. 6, 30 is a test roll which is a cooling roll of an example or a comparative example, 31 and 32 are first and second thermometers for measuring the temperature of the inlet and outlet of cooling water to the test roll 30, respectively. 33 is a flow meter that measures the flow rate of the cooling water, 34 is a cooling water pump, 35 is a motor that rotationally drives the test roll 30, 37 to 41 are the surface temperature of the test roll 30, and the axial direction thereof (in FIG. 6). It is the 1st-5th surface thermometer which each measures in a different position along a horizontal direction).

試験用ロール３０は、図７に示す加熱ヒータ３６によって後述のように加熱される。この加熱ヒータ３６及び上記モータ３５は、図６の制御盤４２によって制御される。   The test roll 30 is heated as described later by the heater 36 shown in FIG. The heater 36 and the motor 35 are controlled by a control panel 42 in FIG.

この試験設備において、モータ３５によって、試験用ロール３０を、６４ｒｐｍで回転させ、冷却水ポンプ３４によって、冷却水を、２１．５ｍ3／ｈの流量で試験用ロール３０内に循環させ、加熱ヒータ３６によって試験用ロール３０の外面を加熱する。その後、平衡状態となったところで、冷却水の入口温度及び出口温度を、第１，第２温度計３１，３２でそれぞれ計測した。試験用ロール３０の表面温度は、第１〜第５表面温度計３７〜４１でそれぞれ計測し、それらの平均値とした。In this test facility, the test roll 30 is rotated at 64 rpm by the motor 35, and the cooling water is circulated in the test roll 30 at a flow rate of 21.5 m 3 / h by the cooling water pump 34. The outer surface of the test roll 30 is heated by 36. Thereafter, when the equilibrium state was reached, the inlet temperature and the outlet temperature of the cooling water were measured by the first and second thermometers 31 and 32, respectively. The surface temperature of the test roll 30 was measured by the first to fifth surface thermometers 37 to 41, and the average value thereof was used.

試験設備で得られた計測値に基づいて、熱流束(ヒートフラックス)及び沸騰伝熱係数を、下記の式（３）〜（７）を使用して求めた。   Based on the measured value obtained in the test facility, the heat flux (heat flux) and the boiling heat transfer coefficient were determined using the following formulas (3) to (7).

Ｈ＝Ｖ×（Ｔ2−Ｔ1）×ρｗ×Ｃｐｗ ・・・・・・（３）
θｍ＝[（Ｔ0−Ｔ1）−（Ｔ0−Ｔ2）]／ｌｎ[（Ｔ0−Ｔ1）／（Ｔ0−Ｔ2）] ・・・・・・（４）
Ｕ＝Ｈ／（Ａｏ×θｍ） ・・・・・・（５）
ｑ＝Ｈ／Ａｏ ・・・・・・（６）
１／Ｕ＝Ａｏ／（Ａｉ×ｈ）＋Ｒｔ ・・・・・・（７）
上記式（３）〜（７）において、Ｔ2は冷却水の出口温度［℃］、Ｔ1は冷却水の入口温度［℃］、Ｔ0はロール表面温度の平均値［℃］、Ｕは総括伝熱係数［ｋｃａｌ／ｍ2ｈ℃］、Ａｏはロール外面の伝熱面積［ｍ2］、Ａｉはロール内面の伝熱面積［ｍ2］、ｈは沸騰伝熱係数［ｋｃａｌ／ｍ2ｈ℃］、Ｒｔは沸騰を除いたロールの伝熱抵抗の合計であり、ｑ、Ｖ、ρｗ、Ｃｐｗは、上記図４における上記式（１）の説明と同様である。H = V × (T 2 −T 1 ) × ρw × Cpw (3)
θm = [(T 0 −T 1 ) − (T 0 −T 2 )] / ln [(T 0 −T 1 ) / (T 0 −T 2 )] (4)
U = H / (Ao × θm) (5)
q = H / Ao (6)
1 / U = Ao / (Ai × h) + Rt (7)
In the above formulas (3) to (7), T 2 is the cooling water outlet temperature [° C.], T 1 is the cooling water inlet temperature [° C.], T 0 is the average roll surface temperature [° C.], and U is Overall heat transfer coefficient [kcal / m 2 h ° C.], Ao is the heat transfer area of the roll outer surface [m 2 ], Ai is the heat transfer area of the roll inner surface [m 2 ], h is the boiling heat transfer coefficient [kcal / m 2] h ° C.], Rt is the total heat transfer resistance of the roll excluding boiling, and q, V, ρw, and Cpw are the same as in the description of the above formula (1) in FIG.

上記式（３）〜（５）にて、総括伝熱係数Ｕを算出し、上記式（７）で逆算することにより、沸騰伝熱係数ｈを算出した。式（７）で算出された沸騰伝熱係数ｈと、式（６）の熱流束ｑにて、図８、図９を作図した。   The overall heat transfer coefficient U was calculated by the above formulas (3) to (5), and the boiling heat transfer coefficient h was calculated by calculating back with the above formula (7). FIG. 8 and FIG. 9 were drawn with the boiling heat transfer coefficient h calculated by the equation (7) and the heat flux q of the equation (6).

図８は作動液がＲ−１２４の場合であり、図９は作動液がＲ−１３４ａの場合である。いずれも、実線は実施例を、破線は比較例をそれぞれ示している。   FIG. 8 shows the case where the hydraulic fluid is R-124, and FIG. 9 shows the case where the hydraulic fluid is R-134a. In both cases, the solid line indicates an example, and the broken line indicates a comparative example.

図８及び図９に示すように、いずれの作動液についても、実施例の試験用ロールの沸騰伝熱係数が、比較例の試験用ロールの沸騰伝熱係数を上回っており、冷却効率が向上していることが分る。   As shown in FIGS. 8 and 9, the boiling heat transfer coefficient of the test roll of the example exceeds the boiling heat transfer coefficient of the test roll of the comparative example, and the cooling efficiency is improved for any hydraulic fluid. You can see that

１ 冷却ロール
２ 円筒体
３ 支持軸
６ 入口室
７ 出口室
８ 冷却管
９ 金属皮膜DESCRIPTION OF SYMBOLS 1 Cooling roll 2 Cylindrical body 3 Support shaft 6 Inlet chamber 7 Outlet chamber 8 Cooling pipe 9 Metal film

【０００２】
本発明は、冷却能力を向上させた冷却ロール及びその製造方法を提供することを目的とする。
課題を解決するための手段
［０００７］
上記目的を達成するために、本発明の冷却ロールは、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールにおいて、前記円筒体の内周面に、前記作動流体を保持する金属皮膜が形成される。
［０００８］
前記金属皮膜は、溶射加工によって形成される溶射皮膜であるのが好ましい。
［０００９］
前記金属皮膜は、Ａｌ皮膜であるのが好ましい。
［００１０］
本発明の冷却ロールによれば、円筒体の内周面にＡｌ皮膜等の金属皮膜を、溶射加工等によって形成するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。
［００１１］
本発明の冷却ロールの製造方法は、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールの製造方法において、前記円筒体の内周面に、前記作動流体を保持する金属皮膜を溶射加工によって形成する。
［００１２］
本発明の冷却ロールの製造方法によれば、円筒体の内周面に、金属皮膜を溶射加工によって形成するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。
発明の効果
［００１３］
本発明によれば、円筒体の内周面に金属皮膜を形成するので、冷却ロールの冷却効率を高めることができる。
図面の簡単な説明
［００１４］
［図１］本発明の実施形態に係る冷却ロールの概略縦断面図である。
［図２］図１のＡ−Ａ線の断面図である。[0002]
An object of this invention is to provide the cooling roll which improved the cooling capability, and its manufacturing method.
Means for Solving the Problems [0007]
In order to achieve the above object, a cooling roll according to the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a working fluid that repeats evaporation and condensation is contained in the cylindrical body. In the cooling roll to be sealed, a metal film that holds the working fluid is formed on the inner peripheral surface of the cylindrical body.
[0008]
The metal coating is preferably a thermal spray coating formed by thermal spraying.
[0009]
The metal film is preferably an Al film.
[0010]
According to the cooling roll of the present invention, since a metal film such as an Al film is formed on the inner peripheral surface of the cylindrical body by thermal spraying or the like, the boiling heat transfer coefficient is applied to the inner peripheral surface of the cylindrical body as described later. Compared to the conventional example in which wicking is performed, it is possible to increase the cooling efficiency.
[0011]
The manufacturing method of the cooling roll of the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a cooling fluid in which a working fluid that repeats evaporation and condensation is enclosed in the cylindrical body In this manufacturing method, a metal film for holding the working fluid is formed on the inner peripheral surface of the cylindrical body by thermal spraying.
[0012]
According to the cooling roll manufacturing method of the present invention, the metal coating is formed on the inner peripheral surface of the cylindrical body by thermal spraying, so that the boiling heat transfer coefficient is wicked on the inner peripheral surface of the cylindrical body as described later. Therefore, it is possible to increase the cooling efficiency as compared with the conventional example in which the above is applied.
Effects of the Invention [0013]
According to the present invention, since the metal film is formed on the inner peripheral surface of the cylindrical body, the cooling efficiency of the cooling roll can be increased.
BRIEF DESCRIPTION OF THE DRAWINGS [0014]
FIG. 1 is a schematic longitudinal sectional view of a cooling roll according to an embodiment of the present invention.
2 is a cross-sectional view taken along line AA in FIG.

【０００２】
本発明は、冷却能力を向上させた冷却ロール及びその製造方法を提供することを目的とする。
課題を解決するための手段
［０００７］
上記目的を達成するために、本発明の冷却ロールは、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールにおいて、前記円筒体の内周面に、前記作動流体を保持する気孔を有する溶射皮膜が、溶射加工によって形成される。
［０００８］
前記溶射皮膜の気孔率が、３％以上であるのが好ましい。
［０００９］
前記溶射皮膜は、Ａｌ皮膜であるのが好ましい。
［００１０］
本発明の冷却ロールによれば、円筒体の内周面にＡｌ皮膜等の作動流体を保持する気孔を有する溶射皮膜を、溶射加工によって形成するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。
［００１１］
本発明の冷却ロールの製造方法は、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールの製造方法において、前記円筒体の内周面に、前記作動流体を保持する気孔を有する溶射皮膜を溶射加工によって形成する。
［００１２］
本発明の冷却ロールの製造方法によれば、円筒体の内周面に、作動流体を保持する気孔を有する溶射皮膜を溶射加工によって形成するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。
発明の効果
［００１３］
本発明によれば、円筒体の内周面に気孔を有する溶射皮膜を溶射加工によって形成するので、冷却ロールの冷却効率を高めることができる。
図面の簡単な説明
［００１４］
［図１］本発明の実施形態に係る冷却ロールの概略縦断面図である。
［図２］図１のＡ−Ａ線の断面図である。[0002]
An object of this invention is to provide the cooling roll which improved the cooling capability, and its manufacturing method.
Means for Solving the Problems [0007]
In order to achieve the above object, a cooling roll according to the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a working fluid that repeats evaporation and condensation is contained in the cylindrical body. In the cooling roll to be sealed, a thermal spray coating having pores for holding the working fluid is formed on the inner peripheral surface of the cylindrical body by thermal spraying.
[0008]
It is preferable that the thermal spray coating has a porosity of 3% or more.
[0009]
The thermal spray coating is preferably an Al coating.
[0010]
According to the cooling roll of the present invention, the thermal spray coating having pores for holding a working fluid such as an Al coating is formed on the inner peripheral surface of the cylindrical body by thermal spraying processing. Compared to the conventional example in which the inner peripheral surface of the cylindrical body is wicked, it is possible to increase the cooling efficiency.
[0011]
The manufacturing method of the cooling roll of the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a cooling fluid in which a working fluid that repeats evaporation and condensation is enclosed in the cylindrical body In this manufacturing method, a thermal spray coating having pores for holding the working fluid is formed on the inner peripheral surface of the cylindrical body by thermal spraying.
[0012]
According to the cooling roll manufacturing method of the present invention, the thermal spray coating having pores for holding the working fluid is formed on the inner peripheral surface of the cylindrical body by thermal spraying. Compared to the conventional example in which the inner peripheral surface of the body is subjected to wicking, it is possible to increase the cooling efficiency.
Effects of the Invention [0013]
According to the present invention, since the thermal spray coating having pores is formed on the inner peripheral surface of the cylindrical body by thermal spraying, the cooling efficiency of the cooling roll can be increased.
BRIEF DESCRIPTION OF THE DRAWINGS [0014]
FIG. 1 is a schematic longitudinal sectional view of a cooling roll according to an embodiment of the present invention.
2 is a cross-sectional view taken along line AA in FIG.

上記目的を達成するために、本発明の冷却ロールは、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールにおいて、前記円筒体の内周面に金属皮膜が形成され、前記金属皮膜は、溶射加工によって形成される溶射皮膜であり、前記作動流体を保持する気孔を有する。 In order to achieve the above object, a cooling roll according to the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a working fluid that repeats evaporation and condensation is contained in the cylindrical body. In the cooling roll to be sealed , a metal film is formed on the inner peripheral surface of the cylindrical body, and the metal film is a sprayed film formed by thermal spraying and has pores for holding the working fluid .

本発明の冷却ロールによれば、円筒体の内周面にＡｌ皮膜等の金属皮膜である、作動流体を保持する気孔を有する溶射皮膜を、溶射加工によって形成するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。 According to the cooling roll of the present invention, the thermal spray coating having pores for holding the working fluid, which is a metal coating such as an Al coating, is formed on the inner peripheral surface of the cylindrical body by thermal spraying. The heat transfer coefficient can be increased as compared with the conventional example in which the inner peripheral surface of the cylindrical body is subjected to wicking, and the cooling efficiency can be increased.

本発明の冷却ロールの製造方法は、冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールの製造方法において、前記円筒体の内周面に金属皮膜を溶射加工によって形成し、前記金属皮膜は前記作動流体を保持する気孔を有する。 The manufacturing method of the cooling roll of the present invention includes a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and a cooling fluid in which a working fluid that repeats evaporation and condensation is enclosed in the cylindrical body In this manufacturing method, a metal film is formed on the inner peripheral surface of the cylindrical body by thermal spraying, and the metal film has pores for holding the working fluid .

本発明の冷却ロールの製造方法によれば、円筒体の内周面に、金属皮膜を溶射加工によって形成し、金属皮膜は、作動流体を保持する気孔を有するので、後述のように、沸騰伝熱係数を、円筒体の内周面にウィック加工が施された従来例に比べて高めることが可能となり、冷却効率を高めることができる。 According to the manufacturing method of the cooling roll of the present invention, the inner peripheral surface of the cylindrical body, a metal coating formed by thermal spraying, metal coating, than that having a pore for holding the working fluid, as described below The boiling heat transfer coefficient can be increased as compared with the conventional example in which the inner peripheral surface of the cylindrical body is subjected to wicking, and the cooling efficiency can be increased.

Claims (4)

冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールにおいて、
前記円筒体の内周面に金属皮膜が形成される、
ことを特徴とする冷却ロール。In a cooling roll comprising a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows is disposed, and in which a working fluid that repeats evaporation and condensation is enclosed,
A metal film is formed on the inner peripheral surface of the cylindrical body,
A cooling roll characterized by that. 前記金属皮膜が、溶射加工によって形成される溶射皮膜である、
請求項１に記載の冷却ロール。The metal coating is a thermal spray coating formed by thermal spraying.
The cooling roll according to claim 1. 前記金属皮膜が、Ａｌ皮膜である、
請求項１又は２に記載の冷却ロール。The metal film is an Al film;
The cooling roll according to claim 1 or 2. 冷却流体が流通する複数の冷却管が内部に配設された円筒体を備え、該円筒体内に、蒸発と凝縮とを繰り返す作動流体が封入される冷却ロールの製造方法において、
前記円筒体の内周面に金属皮膜を溶射加工によって形成する、
ことを特徴とする冷却ロールの製造方法。In a manufacturing method of a cooling roll comprising a cylindrical body in which a plurality of cooling pipes through which a cooling fluid flows are provided, and in which a working fluid that repeats evaporation and condensation is enclosed,
Forming a metal coating on the inner peripheral surface of the cylindrical body by thermal spraying;
The manufacturing method of the cooling roll characterized by the above-mentioned.
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