201226164 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種熱管，尤係一種應用於電子元件散熱領 域的熱管的封口方法。 [0002] 【先前彳支術】 習知的熱管主要制程包括縮管、形成毛細結構、焊尾端 、注水、抽真空、夾扁、切斷、焊接等繁複的制程組合 而成。 q [0003] 〇 熱管内的真空度直接影響相變潛熱回應溫度的大小，且 殘留的非溶性氣體易造成毛細結構及熱管殼體的氧化而 導致熱管性能及可靠度的降低。所以，如何確保熱管真 空度係相關業者汲汲努力的方向。因此，有改善注水抽 真空方式、加熱除氣方式、二次除氣方式、注水、抽真 空及焊接多功能制程等方法的使用，但其最後都必需面 對要求嚴苛的封口制程。倘若封口的密封悻不良或其強 度不足，則熱管終將無法達到要求的性能，最後導致熱 管的可靠度問題。 [0004] 習知的熱管封口方法係通過衝壓使熱管殼體緊密貼合， 再經沾錫或點焊而製成。由於封口處熱管殼體之間存在 貼合面，而貼合面上易於形成漏孔而導致封口處洩漏率 增加；且金屬殼體塑性變形後會有回彈現象，當壓力越 大其回彈量也越大，這也將使貼合面上的漏孔的·;戈漏率 增加而造成熱管真空度降低；此外，沾錫或點焊封口方 法所形成的封口結構機械強度不良、表面錫焊易脫落， 將影響熱管的壽命及性能可靠度，且增加製造成本。 099146200 表單編號A0101 第3頁/共15頁 0992079417-0 201226164 【發明内容】 [0005] 有鑒於此，有必要提供一種熱管的封口方法，以確保熱 管内保持較高的真空度，提升熱管的可靠性及使用壽命 〇 [0006] —種熱管的封口方法，包括以下步驟： [0007] 提供一具有開口端的導電的管體； [0008] 提供一組夾扁模具，所述夾扁模具具有兩極性不同的電 極； [0009] 將所述夾扁模具置於所述管體開口端的相對兩側； [0010] 給所述夾扁模具通電，使所述夾扁模具擠壓所述管體開 口端的相對兩側使其變形而靠近並熔融。 [0011] 較於習知技術，所述熱管封口方法利用電極擠壓並使熱 管的殼體熔融焊接而使開口端的殼體形成一體，殼體之 間的貼合面消失且金屬殼體不會產生回彈現象，可有效 降低封口處的洩漏率；同時，可有效提升封口處的機械 強度，進而提升熱管的可靠性，延長其使用壽命。 【實施方式】 [0012] 請參閱圖1至圖3，為本發明第一實施例的熱管100的封口 過程的示意圖，其包括如下步驟： [0013] 提供一縱長的底板11、自底板11 一端中部向外延伸的一 方形的延伸板12、一碗狀的頂蓋13及自頂蓋13 —端延伸 的一延伸蓋14，將該頂蓋13蓋設於底板11上且頂蓋13的 邊緣與底板11密封連接從而形成一内空的管體10，該延 099146200 表單編號A0101 第4頁/共15頁 0992079417-0 201226164 伸蓋14蓋設在延伸板12上且其邊緣與延伸板密封連接 而共同形成一内空的縮管段15，該縮管段15—端、延伸 蓋14與延伸板12的連接處中部形成有一開口 151，該縮管 段1 5與管體1 〇連通設置，且該管體1 〇内設有毛細結構（ 圖未示）並填充有適量的工作液體（圖未示）； [0014] Ο [0015] Ο [0016] 提供一内空的圓管20，將該圓管20的一端插設在縮管段 15的開口 151中，該圓管20與管體1〇内部連通設置，該 圓管20由導電金屬製成，在本實施例中，該圓管2〇由純 銅製成； k供一組夾扁模具30，該夾扁模具3〇為兩長方體狀的電 極31、32，電極31及電極32通電後具有不同的極性，且 電極31、32的導電率較圓管2〇小；使兩電極31、32通電 後分別放置於圓管20相對兩側來擠壓圓管2〇，使圓管20 的相對兩側變形而相互靠近，同時，由:於電極31、3 2的 接觸’使圓管20導電’從而使圓管20内壁間產生大量的 電阻熱而使圓管20相互靠近的相對兩側的内壁溶融，並 在電極31、32的麼力下焊接在一起，而形成一封口段21 〇 請參閱圖4 ’為本發明第二實施例的熱管i〇〇a的封口段的 示意圖。本實施例的熱管l〇〇a與第一實施例的熱管1〇〇區 別在於沒有圓管20，封口過程的區別在於使電極31、32 同時擠壓縮管段15的延伸板12及延伸蓋14，使其相對的 内壁熔融，並在電極31、32的壓力下焊接在一起，而形 成一封口段21a。 099146200 表單編號A0101 第5頁/共15頁 0992079417-0 201226164 [0017] 凊參閱圖5 ’為本發明第三實施例的熱管⑺⑽的示意圖。 本實施例所示熱管1 〇〇b與第二實施例中的熱管丨〇〇的區別 在於其沒有縮管段15 ’底板丨丨與頂蓋13除一角以外的區 域完全密封連接》 [0018] 明同時參閱圖6，熱管i〇〇b封口過程中，電極31、32直 接擠壓底板11與頂蓋〗3未連接處的相對兩側，使其受壓 變形而相互靠近，並使其内壁熔融，並在電極31、32的 壓力下焊接在一起，而形成一封口段2ib。 [0019] 本發明熱管的封口方法與習知技術相比具有如下優點： [0020] 以簡單形狀的電極31、32在擠壓熱管l〇G(l〇〇a、i〇0b) 開口處的同時，使熱管1〇〇(1〇〇a、1〇〇b)管壁受壓變形 且相互靠近的内壁因產生的電阻熱而熔融焊接並在電 極31、32的壓力下焊接在一起形成一封口段21(21a、 21b)，而使封口段21 (2la、21b)的殼體形成一體，使封 口處的殼體之間的貼合面消失且金屬鼓齄不會產生回彈 現象，可有效降低封口處的洩漏率，福保熱管1〇〇(1〇〇a 、100b)内維持較高的真空度，提井熱管的性能；同時， 封口段21 (21a、21b)的殼體形成一體，可有效提升封口 處的機械強度，進而提升熱管的可靠性，延長其使用壽 命。 [0021] 可以理解的，本發明中，熱管可以呈圓管裝、扁平管狀 等形狀，同時，電極31、32也可以根據需要而具備不同 的形狀。 [0022] 综上所述，本發明符合發明專利要件，爰依法提出專利 099146200 表單編號A0101 第6頁/共15頁 0992079417-0 201226164 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内。 【圖式簡單說明】 [0023] 圖1至圖3係本發明第一實施例的熱管封口過程示意圖。 [0024] 圖4係本發明第二實施例的熱管的封口段的示意圖。 [0025] 圖5係本發明第三實施例的熱管的示意圖。 [0026] 圖6係本發明第三實施例的熱管的封口段的局部放大的示201226164 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a heat pipe, and more particularly to a sealing method of a heat pipe applied to a heat dissipation field of an electronic component. [0002] [Previous sputum spurs] The main processes of the known heat pipes include a combination of shrinking tubes, forming capillary structures, welding tails, water injection, vacuuming, flattening, cutting, welding, and the like. q [0003] The degree of vacuum in the heat pipe directly affects the response temperature of the phase change latent heat, and the residual non-soluble gas is liable to cause oxidation of the capillary structure and the heat pipe shell, resulting in a decrease in heat pipe performance and reliability. Therefore, how to ensure the heat pipe vacuum is the direction of the relevant industry. Therefore, there are methods for improving the water injection vacuum method, the heating degassing method, the secondary degassing method, the water injection, the vacuum evacuation, and the welding multi-function process, but in the end, it is necessary to face the demanding sealing process. If the sealing seal of the seal is poor or its strength is insufficient, the heat pipe will eventually fail to achieve the required performance, which will eventually lead to reliability problems of the heat pipe. [0004] A conventional heat pipe sealing method is formed by pressing a heat pipe casing tightly by pressing, and then by soldering or spot welding. Because there is a bonding surface between the heat pipe shells at the sealing, the leakage surface is easy to form on the bonding surface, which leads to an increase in the leak rate at the sealing; and the metal casing will rebound after plastic deformation, and the rebound will occur when the pressure is greater. The larger the amount, the more the leakage of the leaking surface on the bonding surface will be increased, and the vacuum degree of the heat pipe will be lowered. In addition, the sealing structure formed by the soldering or spot welding method has poor mechanical strength and surface tin. The welding is easy to fall off, which will affect the life and performance reliability of the heat pipe and increase the manufacturing cost. 099146200 Form No. A0101 Page 3 of 15 0992079417-0 201226164 [Invention] [0005] In view of the above, it is necessary to provide a sealing method for a heat pipe to ensure a high degree of vacuum in the heat pipe and to improve the reliability of the heat pipe. [0006] A method for sealing a heat pipe, comprising the steps of: [0007] providing a conductive tube having an open end; [0008] providing a set of flat molds, the flat mold having two polarities Different electrodes; [0009] placing the clamping flat mold on opposite sides of the open end of the tubular body; [0010] energizing the clamping flat mold, causing the clamping flat mold to press the open end of the tubular body The opposite sides are deformed to be close to and melt. [0011] Compared with the prior art, the heat pipe sealing method utilizes electrode extrusion and fusion welding of the heat pipe casing to form the casing at the open end, and the bonding surface between the casings disappears and the metal casing does not The rebound phenomenon can effectively reduce the leakage rate at the seal; at the same time, the mechanical strength of the seal can be effectively improved, thereby improving the reliability of the heat pipe and prolonging its service life. [0012] Please refer to FIG. 1 to FIG. 3, which are schematic diagrams showing a sealing process of a heat pipe 100 according to a first embodiment of the present invention, which includes the following steps: [0013] Providing a vertically long bottom plate 11 and a bottom plate 11 a square extending plate 12 extending outwardly from a central portion of one end, a bowl-shaped top cover 13 and an extending cover 14 extending from the end of the top cover 13 , the top cover 13 is covered on the bottom plate 11 and the top cover 13 The edge is sealingly connected to the bottom plate 11 to form an inner hollow tube body 10, the extension 099146200 Form No. A0101 Page 4 / Total 15 Page 0992079417-0 201226164 The cover 14 is covered on the extension plate 12 and its edge is sealed with the extension plate Connecting together to form an inner hollow constricted section 15, an intermediate portion 151 of the end portion of the constricted section, the extension cover 14 and the extension plate 12 is formed with an opening 151, and the constricted section 15 is disposed in communication with the tubular body 1 and The tubular body 1 is provided with a capillary structure (not shown) and filled with an appropriate amount of working liquid (not shown); [0014] Ο [0016] An inner hollow tube 20 is provided, the circle is provided One end of the tube 20 is inserted into the opening 151 of the shrink tube section 15, and the tube 20 is inside the tube body 1 Connected to the portion, the circular tube 20 is made of a conductive metal. In the present embodiment, the round tube 2 is made of pure copper; k is provided for a set of flat molds 30, which are two rectangular parallelepiped shapes. The electrodes 31, 32, the electrodes 31 and the electrodes 32 have different polarities after being energized, and the conductivity of the electrodes 31, 32 is smaller than that of the round tube 2; the two electrodes 31, 32 are energized and placed on opposite sides of the round tube 20, respectively. The tube 2 is extruded to deform the opposite sides of the tube 20 to be close to each other, and at the same time, the contact of the electrodes 31, 3 2 'conducts the tube 20' so that a large amount of resistance is generated between the inner walls of the tube 20. The inner walls of the opposite sides of the tube 20 are heated together and welded together under the force of the electrodes 31, 32 to form a mouth segment 21. Referring to Figure 4, a second embodiment of the present invention is shown. Schematic diagram of the sealing section of the heat pipe i〇〇a. The heat pipe 10a of the present embodiment is different from the heat pipe 1 of the first embodiment in that there is no round pipe 20. The sealing process is different in that the electrodes 31, 32 are simultaneously squeezed to extend the extension plate 12 and the extension cover 14 of the pipe section 15, The opposite inner walls are melted and welded together under the pressure of the electrodes 31, 32 to form a mouth segment 21a. 099146200 Form No. A0101 Page 5 of 15 0992079417-0 201226164 [0017] Referring to Figure 5' is a schematic view of a heat pipe (7) (10) according to a third embodiment of the present invention. The heat pipe 1 〇〇 b shown in this embodiment is different from the heat pipe 第二 b in the second embodiment in that it has no shrinkable pipe section 15 'the bottom plate 完全 is completely sealed from the area of the top cover 13 except for one corner. [0018] Referring to FIG. 6 , during the sealing process of the heat pipe i〇〇b, the electrodes 31 and 32 directly press the opposite sides of the bottom plate 11 and the top cover 〖3 unconnected, so that they are pressed and deformed to be close to each other, and the inner wall is melted. And welded together under the pressure of the electrodes 31, 32 to form a mouth segment 2ib. [0019] The sealing method of the heat pipe of the present invention has the following advantages compared with the prior art: [0020] The electrodes 31, 32 of a simple shape are at the opening of the extruded heat pipe l〇G (l〇〇a, i〇0b) At the same time, the heat pipe 1〇〇(1〇〇a, 1〇〇b) is deformed and the inner walls close to each other are welded by the resistance heat generated and welded together under the pressure of the electrodes 31, 32 to form a heat pipe. The sealing section 21 (21a, 21b) is formed integrally with the casing of the sealing section 21 (2la, 21b), so that the bonding surface between the casings at the sealing portion disappears and the metal drumstick does not rebound. Effectively reduce the leakage rate at the seal, maintain a high vacuum in the 1保 (1〇〇a, 100b) of the Fubao heat pipe, and improve the performance of the heat pipe; at the same time, the casing of the sealing section 21 (21a, 21b) is formed. The integrated body can effectively improve the mechanical strength of the seal, thereby improving the reliability of the heat pipe and prolonging its service life. [0021] It can be understood that in the present invention, the heat pipe may have a shape of a round tube or a flat tube, and the electrodes 31 and 32 may have different shapes as needed. [0022] In summary, the present invention meets the requirements of the invention patent, and patents are filed according to law. 099146200 Form No. A0101 Page 6 of 15 0992079417-0 201226164 Application. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0023] FIGS. 1 to 3 are schematic views showing a heat sealing process of a first embodiment of the present invention. 4 is a schematic view showing a sealing section of a heat pipe according to a second embodiment of the present invention. 5 is a schematic view of a heat pipe according to a third embodiment of the present invention. 6 is a partially enlarged view showing a sealing section of a heat pipe according to a third embodiment of the present invention;
意圖。intention.
【主要元件符號說明】 [0027] 管體：10 [0028] 底板：11 [0029] 延伸板：12 [0030] 頂蓋：13 [0031] 延伸蓋：14 [0032] 縮管段：1 5 [0033] 圓管：2 0 [0034] 夾扁模具：30 [0035] 電極：31、32 [0036] 封口段：21、21 a、21 b [0037] 熱管：100、100a、100b 099146200 表單編號A0101 第7頁/共15頁 0992079417-0 :151201226164 [0038] 開口 099146200 表單編號A0101 第8頁/共15頁 0992079417-0[Main component symbol description] [0027] Tube body: 10 [0028] Base plate: 11 [0029] Extension plate: 12 [0030] Top cover: 13 [0031] Extension cover: 14 [0032] Shrink tube section: 1 5 [0033 Round tube: 2 0 [0034] Flat mold: 30 [0035] Electrode: 31, 32 [0036] Sealing section: 21, 21 a, 21 b [0037] Heat pipe: 100, 100a, 100b 099146200 Form number A0101 7 pages/total 15 pages 0992079417-0 :151201226164 [0038] Opening 099146200 Form number A0101 Page 8 of 15 0992079417-0