TWI572842B - 熱管製造方法及熱管 - Google Patents
熱管製造方法及熱管 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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- 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
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- 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
- F28D15/0233—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 the conduits having a particular shape, e.g. non-circular cross-section, annular
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- 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
- F28D15/0283—Means for filling or sealing heat pipes
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- 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
- F28D15/04—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 tubes having a capillary structure
- F28D15/046—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 tubes having a capillary structure characterised by the material or the construction of the capillary structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/005—Article surface comprising protrusions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/10—Heat sinks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
- F28F2255/18—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes sintered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49353—Heat pipe device making
Description
本發明涉及一種熱管的製造方法及熱管。
熱管由於具有較快的傳熱速度及靜音等特點,而被廣泛應用作電子元件的散熱。
熱管通常包括一具有一定真空度的密封管體、設於管體內的毛細結構層以及填充於管體內的的工作液體。該熱管一端為蒸發端而另一端為冷凝端。當熱管蒸發端吸熱時,熱管內的工作液體蒸發汽化,蒸汽在微小壓差下流向冷凝端放出熱量後凝結成液體,液體藉由毛細結構層產生的毛細壓力差回流至熱管蒸發端,從而使熱量由熱管蒸發端迅速傳至冷凝端。
該管體通常由長直圓管經裁切、縮管及封口等流程製成,然後再根據需要將管體彎折或壓扁成不同的形狀。這種熱管的管體不僅製造流程複雜,而且在彎折或壓扁時,管體內的毛細結構容易被破壞,從而使熱管在工作時管體內的工作液體不能及時回流,進而使熱管的蒸發端發生乾燒現象。
有鑒於此,有必要提供一種製造流程簡單又能避免蒸發端發生乾燒的熱管及其製造方法。
一種熱管製造方法,包括以下步驟:1)將有機黏接劑與金屬粉末按體積比2:3~7:3進行混合,然後進行混煉,得到射出成型原料,其中,所述金屬粉末選自金屬、合金及金屬氧化物中的一種,所述有機黏接劑為具有流變性的樹脂材料,與金屬粉末混合時不起化學反應且從金屬粉末中去除時不殘留碳;2)將所述射出成型原料送入射出成型機,藉由射出成型機將所述射出成型原料壓入預製的成型模具中,制得具有預定形狀的胚件;3)採用物理或化學方法將所述胚件中的有機黏接劑去除;4)將上述脫脂後的胚件兩兩合攏,然後在預設溫度下燒結,使胚件中的金屬粉末顆粒之間的孔隙消除,同時使相互合攏的兩胚件相互結合在一起形成管體,所述管體的一端封閉,另一端開口;5)自所述管體的開口的一端填充工作液體並對管體抽真空及封口。
一種熱管,該熱管由上述熱管製造方法製成。
本發明中的熱管製造方法中,熱管的管體藉由金屬粉末射出成型,管體可以直接成型成所需的形狀及大小,省去了裁切、縮管及折彎等流程,製造流程簡單,並且,避免由於省去了裁切、縮管及折彎等流程所造成的管體內部毛細結構的損壞,進而避免熱管的在工作時發生乾燒的現象。
10‧‧‧熱管
11‧‧‧管體
111,112,111a,112a,111b,112b,111c,112c,111d,112d‧‧‧胚件
1110,1111‧‧‧斜面
1110c‧‧‧凹槽
1111c‧‧‧凸起
12‧‧‧毛細結構
121‧‧‧毛細溝槽
122‧‧‧凸起
圖1為本發明第一實施例的熱管製造方法中的熱管的立體圖。
圖2為圖1所示的熱管的沿II-II處的截面圖。
圖3為本發明第一實施例的熱管製造方法中的胚件的截面圖。
圖4為本發明第二實施例的熱管製造方法中的胚件的截面圖。
圖5為本發明第三實施例的熱管製造方法中的胚件的截面圖。
圖6為本發明第四實施例的熱管製造方法中的胚件的截面圖。
圖7為本發明第五實施例的熱管製造方法中的胚件的截面圖。
圖1及圖2所示為本發明第一實施例的熱管製造方法所製造的熱管10,該熱管10包括一管體11、設於該管體11內壁面上的毛細結構層12及填充於管體11內的工作液體。
該熱管的製造方法包括以下步驟:
首先,進行原料準備,取適量金屬粉末及有機黏接劑進行混合。該金屬粉末選自導熱性材料,如金屬、合金及金屬氧化物,具體如:如銅、鋁、銅合金、鋁合金、Fe-Ni合金、不銹鋼、鈦合金、鎳基超合金、氧化鋁、氧化鋯等,粒徑為0.5~20μm。粉末的顆粒越細,表面積亦越大,易於成型和燒結,金屬粉末粒徑為5~15μm時具有較佳的成型效果。該有機黏接劑為具有流變性的樹脂材料,與金屬粉末混合時不起任何化學反應且從金屬粉末中去除時不殘留碳。該有機黏接劑能使其與金屬粉末的混合料具有較好的流變性,在實際操作中可以根據不同的金屬粉末進行選擇,如聚乙烯、醋酸乙烯酯等。該金屬粉末與有機黏接劑的體積比為2:3~7:3。然後將混合料用混煉機混煉成均勻的塑膠熔液,從而使金屬粉末與有機黏接劑均勻混合,即可得到射出成型原料。混煉之後,還可以根據射出成型機的需求進行造粒或粉碎。常用的混煉機有雙螺旋擠出機、Z形葉輪混煉機、單螺旋擠出機、柱塞式擠出機、雙行星混煉機、雙凸輪混煉機等。
其次,進行射出成型,如圖3所示,將上述制得的射出成型原料送入射出成型機,藉由射出成型機將所述原料壓入預製的模具中,從而製成具有預定形狀的胚件111,每一熱管10的管體11由兩隻胚件111,112組成,每一胚件111,112具有一U形的橫截面,且每一胚件111,112的內表面上形成有相互交替排列的毛細溝槽121及凸起122,所述毛細溝槽121及凸起122共同組成該熱管10的管體11上的毛細結構12。本實施例中,該毛細結構12借助成型模具形成於胚件111,112的內表面,在其他的實施例中,該毛細結構12亦可獨立成型再附著於胚件111,112的內表面,如由金屬線編織成絲網再藉由物理或化學方法使該絲網附著於胚件111,112的內表面。
再次,對胚件111,112進行脫脂,採用物理或化學方法將胚件111,112中的有機黏接劑去除。本實施例中,脫脂選用熱脫脂法,即在高溫條件下使所述機黏接劑轉化為氣體逸散。在其他的實施例中,亦可選用溶劑脫脂輔以熱脫脂,或虹吸脫脂輔助以熱脫脂法。
再次,將胚件111燒結,將上述脫脂後的胚件111,112兩兩合攏,使該兩胚件111,112的軸向平行,且每一胚件111的毛細結構12正對另一胚件111上的毛細結構12。然後在高溫條件下燒結,使胚件111,112中的金屬粉末顆粒之間的孔隙消除,同時使胚件111,112相互結合在一起,組成所述管體11。該管體11的一端封閉,另一端開口,其中開口的一端為漸縮狀。為進一步提升管體11的外觀,可對該管體11進行二次加工,如熱處理、表面處理等。
最後,向管體11填充工作液體並對管體11抽真空及封口,自該管體11的開口一端向該管體11內加入適量工作液體,該工作液體為汽化熱高、流動性好、沸點較低的液態物質,如水、乙醇、丙酮等,然後從該開口的一端抽真空然後將開口處封口,即可得所述熱管10。
上述熱管的製造方法中,熱管10的管體11藉由金屬粉末射出成型,管體11可以直接成型成所需的形狀及大小,省去了裁切、縮管及折彎等流程,製造流程簡單,並且,避免由於省去了裁切、縮管及折彎等流程所造成的管體11內部毛細結構的損壞,進而避免熱管10在工作時發生乾燒的現象。
上述第一實施例的熱管製造方法中,組成熱管10的管體11的兩胚件111,112結構相同,且該胚件111,112對接的邊緣均為平面,然而,在其他的實施例中,所述胚件111,112相互對接的邊緣的還可以為其他結構。
圖4所示為本發明第二實施例中的熱管製造方法中組成熱管的管體的兩胚件111a,112a,其與第一實施例的熱管製造方法中的胚件111,112結構相似,不同之處在於該兩胚件111a,112a的邊緣呈傾斜狀,具體而言,胚件111a的邊緣為向內側傾斜的斜面1110,胚件112a的邊緣為向外側傾斜的斜面1111,這樣可以保證它們在對接時能夠準確的對位。
圖5所示為本發明第三實施例中的熱管製造方法中組成熱管的管體的兩胚件111b,112b,其與第一實施例的熱管製造方法中的胚件111,112結構相似,不同之處在於該兩胚件111b,112b的邊緣均呈台階狀。
圖6所示為本發明第四實施例中的熱管製造方法中組成熱管的管體的兩胚件111c,112c,其與第一實施例的熱管製造方法中的胚件111,112結構相似,不同之處在於胚件111c的邊緣上設有內凹進的凹槽1110c,胚件112c的邊緣上設有與該凹槽1110c對應的凸起1111c,該凸起1111c嵌入該凹槽1110c中,從而使該兩胚件111c,112c對接在一起。
圖7所示為本發明第五實施例中的熱管製造方法中組成熱管的管體的兩胚件111d,112d,該兩胚件111d,112d中,胚件11d的內徑小於胚件112d的內徑,當兩胚件111d,112d對接時,胚件111d的外壁與胚件112d的內壁結合,從而使該兩胚件111d,112d對接在一起。
綜上所述,本發明符合發明專利要件,爰依法提出專利申請。惟,以上所述者僅為本發明之較佳實施例,舉凡熟悉本案技藝之人士,在爰依本發明精神所作之等效修飾或變化,皆應涵蓋於以下之申請專利範圍內。
111,112‧‧‧胚件
12‧‧‧毛細結構
121‧‧‧毛細溝槽
122‧‧‧凸起
Claims (10)
- 一種熱管製造方法,包括以下步驟:1)將有機黏接劑與金屬粉末按體積比2:3~7:3進行混合,然後進行混煉,得到射出成型原料,其中,所述金屬粉末選自金屬、合金及金屬氧化物中的一種,所述有機黏接劑為具有流變性的樹脂材料,與金屬粉末混合時不起化學反應且從金屬粉末中去除時不殘留碳;2)將所述射出成型原料送入射出成型機,藉由射出成型機將所述射出成型原料壓入預製的成型模具中,制得具有預定形狀的二胚件,所述兩胚件邊緣形成有對準結構,所述對準結構為傾角互補的傾斜面,截面形狀互補的台階結構,或凹凸配合的凹槽及凸起;3)採用物理或化學方法將所述胚件中的有機黏接劑去除;4)將上述脫脂後的胚件兩兩合攏,並藉由對準結構相互對準,然後在預設溫度下燒結,使胚件中的金屬粉末顆粒之間的孔隙消除,同時使相互合攏的兩胚件相互結合在一起形成管體,所述管體的一端封閉,另一端開口;5)自所述管體的開口的一端填充工作液體並對管體抽真空及封口。
- 如申請專利範圍第1項所述的熱管製造方法,其中所述金屬粉末選自銅、鋁、銅合金、鋁合金、Fe-Ni合金、不銹鋼、鈦合金、鎳基超合金、氧化鋁、氧化鋯中的任意一種。
- 如申請專利範圍第1項或第2項所述的熱管製造方法,其中所述金屬粉的粒徑為0.5~20μm。
- 如申請專利範圍第3項所述的熱管製造方法,其中所述粉末的粒徑為5~15μm。
- 如申請專利範圍第1項所述的熱管製造方法,其中步驟1)中還包括對制得的成型原料進行造粒或粉碎的過程。
- 如申請專利範圍第1項所述的熱管製造方法,其中所述胚件的內表面成型有毛細溝槽及凸起,所述毛細溝槽及凸起共同組成毛細結構。
- 如申請專利範圍第1項所述的熱管製造方法,其中步驟2)中還包括將金屬線編織成絲網再藉由物理或化學方法附著於胚件的內表面的過程。
- 如申請專利範圍第1項所述的熱管製造方法,其中所述開口的一端為漸縮狀。
- 如申請專利範圍第1項所述的熱管製造方法,還包括步驟6),即所述管體進行熱處理或表面處理。
- 一種熱管,其改良在於:該熱管藉由申請專利範圍第1至9項任意一項所述的熱管製造方法製成。
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JP5759606B1 (ja) * | 2014-09-30 | 2015-08-05 | 株式会社フジクラ | ヒートパイプ |
CN107655356A (zh) * | 2016-07-25 | 2018-02-02 | 昆山巨仲电子有限公司 | 热管及其封口方法 |
CN106891010A (zh) * | 2017-04-11 | 2017-06-27 | 深圳市泛海统联精密制造有限公司 | 中空制品及其采用的金属注射成型方法 |
CN109676141B (zh) * | 2017-12-06 | 2020-10-23 | 全亿大科技(佛山)有限公司 | 异形复杂金属制品的制造方法及异形复杂金属制品 |
US20190191589A1 (en) * | 2017-12-15 | 2019-06-20 | Google Llc | Three-Dimensional Electronic Structure with Integrated Phase-Change Cooling |
TWI686908B (zh) * | 2018-12-24 | 2020-03-01 | 信紘科技股份有限公司 | 膠囊式導熱柱製程及結構 |
CN111780599A (zh) * | 2020-06-08 | 2020-10-16 | 华南理工大学 | 一种高温热管的封装方法 |
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