CN100437007C - 热管制造方法 - Google Patents

热管制造方法 Download PDF

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CN100437007C
CN100437007C CNB2005100374852A CN200510037485A CN100437007C CN 100437007 C CN100437007 C CN 100437007C CN B2005100374852 A CNB2005100374852 A CN B2005100374852A CN 200510037485 A CN200510037485 A CN 200510037485A CN 100437007 C CN100437007 C CN 100437007C
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侯春树
童兆年
刘泰健
李振吉
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Fuzhun Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Abstract

本发明公开一种热管制造方法，其步骤有：提供热管壳体，其具有第一端口及第二端口；壳体内充填粉体；将填粉烧结；注入工作流体并抽空气体后密封管体。其中壳体内充填粉体步骤有：a.提供一震动平台及抽气泵，该震动平台连接一震动源，将热管壳体竖直固定于震动平台上，该热管壳体第一端口配接上述抽气泵；b.提供中芯棒、进料漏斗及粉体，将中芯棒从热管壳体第二端口***，并将该热管第二端口上配接进料漏斗，该进料漏斗内装入适量粉体，其中该中芯棒对应热管壳体第一端口的端部设有沟通热管壳体第一端口及中芯棒与热管壳体之间可充填粉体的空间的沟槽；c.启动震动源及抽气泵，将粉体充填至中芯棒与热管壳体中间。

Description

热管制造方法
【技术领域】
本发明涉及一种热管制造的方法，特别是关于一种热管的粉体充填制程。
【背景技术】
随着电子产业不断发展，电子元件(特别是中央处理器)运行速度和整体性能在不断提升。然而，它的发热量也随之剧增，从而引起了热管等高热导性元件在散热领域的广泛应用。热管是主要由真空密封的管形壳体、其内壁上设置的毛细结构(如粉体烧结物、沟槽结构、丝网结构等)及其内适量装入的工作液体(如水、乙醇、丙酮等)组成。热管按毛细结构的不同可分为烧结式热管、沟槽式热管及丝网式热管等。其中烧结式热管由于在弯折、吸附力等方面优越于沟槽及丝网式热管，其应用比较广泛。
众所周知，毛细结构的孔隙率及孔隙大小将决定烧结式热管的传热性能。而除粉体本身的物性因素外，其生胚的充填密度也具有极其重要的影响。因为生胚的充填密度将直接影响烧结温度、毛细结构强度、孔隙率、孔隙大小、渗透力及毛细力。
传统的烧结式热管其填充粉体的主要方式，初期是以人工一支一支填粉方式来制作，其主要缺点是填粉不均且不具量产经济价值及规模；因此相关业者进一步发展为半自动化震动式填粉制程来增加其量产性，如图1所示为现有的一种填粉方法，其包括一连接有震动源的震动平台、热管壳体60’、中芯棒40’、进料漏斗30’及进料盖板10’、粉体20’等。该震动平台具有一上支撑板50’、一下支撑板70’，该二支撑板50’、70’上分别对应设有供安装热管壳体60’的数个空穴。填粉时将中芯棒40’***热管壳体60’内并置于震动平台的上下支撑板50’、70’的空穴内固定，热管壳体60’上方再套进料漏斗30’，最上方再以进料盖板10’将中芯棒40’定位，适量粉体20’置于进料漏斗30’内，经由震动机作用将震动平台依设计运动方向震动，使得粉体20’依序进入中芯棒40’与热管壳体60’之间的间隙内，以达成填粉制程。然而在实际操作过程中，经常发现热管有不良品发生，经分析其原因为粉体产生架桥现象，如图2所示，图2是图1的II部分的放大图，热管壳体内上面的粉体颗粒被卡住而无法下行，致使填粉完成后有较大空穴产生，从而降低热管的毛吸力及工作液体回流动力不均。该架桥现象发生原因主要是因粉体的物理特性差异所导致，例如：视密度、流动性、粉体颗粒形状、粉体颗粒大小。『架桥』现象严重影响毛细结构的连续性，进而导致热导管性能无法保证。
【发明内容】
有鉴于此，有必要提供一种强制气流方式解决热管的因热管填粉时架桥现象等原因导致的毛细结构的不连续而降低热管的毛吸力及工作液体回流动力不均问题的填粉制程。
一种热管制造方法，其包括以下步骤：提供热管壳体，该热管壳体具有第一端口及第二端口；在热管壳体内充填粉体，其步骤有：a.提供一震动平台及抽气泵，该震动平台连接一震动源，将热管壳体竖直固定于震动平台上，该热管壳体第一端口配接上述抽气泵；b.提供中芯棒、进料漏斗及粉体，将中芯棒从热管壳体第二端口***其内，并将该热管第二端口上配接进料漏斗，该进料漏斗内装入适量粉体，其中该中芯棒对应热管壳体第一端口的端部设有沟通热管壳体第一端口及中芯棒与热管壳体之间可充填粉体的空间的沟槽；c.启动震动源及泵，将粉体充填至中芯棒与热管壳体中间；烧结热管，使粉体与热管壳体内面相结合，抽出中芯棒，密封热管壳体第一、第二端口中的任一端口；注入工作液体后抽出壳体内的空气及惰性气体并密封热管壳体第一、第二端口中的另一端口。
所述热管制造方法与现有技术相比具有如下优点：由于填粉时利用抽气泵及沟槽形成强制流场，在强制流场作用力下，可以克服粉体之间摩擦力所造成的架桥现象，使粉体均匀填覆于壳体内壁，进而形成均匀毛吸力及回流动力，提高热管性能。
下面参照附图，结合具体实施例对本发明作进一步的描述。
【附图说明】
图1是现有热管制造方法的填粉结构示意图。
图2是图1的II部分放大图。
图3是本发明热管制造方法中的填粉结构的第一实施例示意图。
图4是图3的IV部分放大图。
图5是本发明热管制造方法中填粉结构的第二实施例部分放大图。
图6是本发明热管制造方法中填粉结构的第三实施例部分放大图。
图7是本发明热管制造方法中填粉结构的第四实施例部分放大图。
【具体实施方式】
以下参照图3至图7，对本发明热管制造方法中的热管填粉方法及实施该方法的填粉结构予以进一步详细说明。本发明热管制造方法包括如下步骤：提供热管壳体，所述热管壳体具有一第一端口及一第二端口；热管壳体内充填粉体；烧结热管壳体使粉体结合于热管壳体内表面，然后密封热管壳体第一、第二端口中的任一端口；热管壳体内注入工作流体并抽空，再密封热管壳体第一、第二端口中的另一端口。
图3及图4为本发明热管制造方法中有关热管壳体内填粉步骤的第一较佳实施例。其由一填粉机构实施，该填粉机构包括一连接有震动源的震动平台、热管壳体600、中芯棒400、进料漏斗300及进料盖板100、粉体200及抽气泵800。该中芯棒400前端呈锥形部，该锥形端部设有数条沿棒体轴向延伸的沟槽410(如图4所示)，该沟槽410的一端延伸至中芯棒400的露出热管壳体600下端口处，另一端延伸至中芯棒400与热管壳体600之间具有可充填粉体200的空间部分位置。该震动平台具有一上支撑板500、一下支撑板700，该二支撑板500、700上分别对应设有供安装热管壳体600的数个空穴。该热管壳体600具有第一端口、第二端口，第一端口逐渐缩减直径而形成小于本体直径的颈状端口，该热管壳体600的本体直径小于上支撑板500的空穴尺寸，大于下支撑板700的空穴尺寸，而该第一端口的直径小于下支撑板700的空穴尺寸。填粉时将中芯棒400从热管壳体600的第二端口***其内并置于震动平台的上下支撑板500、700空穴内固定，其中热管壳体600的第一端口位于下支撑板700的空穴内并中芯棒400的锥形端部位于该热管壳体600的第一端口处，热管壳体600上方再套进料漏斗300，最上方再以进料盖板100将中芯棒400定位，适量粉体200置于进料漏斗300内，并且将抽气泵800安装于热管壳体600的第一端口，经由震动机作用将震动平台依设计运动方向震动的同时激活抽气泵800进行抽气，使得粉体200依序进入中芯棒400与热管壳体600之间的间隙内，以达成填粉制程。由于抽气泵800沿中芯棒400端部的沟槽410进行抽气，中芯棒400与热管壳体600之间的间隙内的气体从上而下强制流动，使粉体200顺风依序向下充填，不宜产生架桥现象。
可以理解地，为了避免粉体进入沟槽内而被泵吸出或挡住吸气的通道，上述中芯棒400端部的轴向沟槽410宽度小于粉体200颗粒大小，如介于20μm～100μm，其中以50μm～80μm较佳。其轴向沟槽410数目至少有一个。
图5为本发明热管制造方法中有关热管壳体内填粉步骤的第二较佳实施例。其相较第一实施例的改进之处在于，该中芯棒400’锥形端部的沟槽410’相对第一实施例的沟槽410轴向向中芯棒400’另一端部延伸至越出锥形部分的位置，以使该沟槽410’的一端可与中芯棒400’与热管壳体600之间可充填粉体200的空间更充分的通畅，利于形成更为畅通的强制流场。
图6为本发明热管制造方法中有关热管壳体内填粉步骤的第三较佳实施例。其与第一实施例的区别在于，该中芯棒400”锥形端部的沟槽410”由两部分构成即中芯棒400”端部周向延伸数个平列环形沟槽及沟通该等环形沟槽的至少一轴向沟槽，以维持各沟槽的畅通。该最两边的环形沟槽及轴向沟槽两端沟通抽气泵800及中芯棒400”与热管壳体600之间的可充填粉体200的空间。
图7为本发明热管制造方法中有关热管壳体内填粉步骤的第四较佳实施例。其与第一实施例的区别在于，该中芯棒400”’锥形端部设有一螺旋状沟槽410”’。该沟槽410”’的一端延伸至中芯棒400”’的露出热管壳体600下端口处，另一端延伸至中芯棒400”’与热管壳体600之间具有可充填粉体200的空间部分。
由于本发明的填粉步骤利用抽气泵及沟槽形成强制流场，在强制流场作用力下，可以克服粉体之间摩擦力所造成的架桥现象，使粉体均匀填覆于壳体内壁，进而形成均匀毛吸力及回流动力，提高热管性能；还可以避免粉体充填时四处弥漫造成环境污染及影响操作人员健康安全。

Claims (7)

1.一种热管制造方法，包括以下步骤：
提供热管壳体，该热管壳体具有第一端口及第二端口；
在热管壳体内充填粉体，其步骤如下：
a.提供一震动平台及抽气泵，该震动平台连接一震动源，将上述热管壳体竖直固定于震动平台上，该热管壳体第一端口配接上述抽气泵；
b.提供中芯棒、进料漏斗及粉体，将中芯棒从热管壳体第二端口***其内，并将该热管第二端口上配接进料漏斗，该进料漏斗内装入适量粉体，其中该中芯棒对应热管壳体第一端口的端部设有沟通热管壳体第一端口及中芯棒与热管壳体间可充填粉体的空间的沟槽；
c.启动震动源使震动平台开始震动并启动抽气泵，将粉体充填至中芯棒与热管壳体之间；
烧结热管，使粉体与热管壳体内表面相结合，抽出中芯棒，密封热管壳体第一、第二端口中的任一端口；
注入工作液体后抽出壳体内的空气及惰性气体并密封热管壳体第一、第二端口中的另一端口。
2.如权利要求1所述的热管制造方法，其特征在于：所述沟槽宽度小于粉体颗粒大小。
3.如权利要求2所述的热管制造方法，其特征在于：所述中芯棒对应热管壳体第一端口的端部为锥形端，该锥形端上形成上述沟槽。
4.如权利要求3所述的热管制造方法，其特征在于：所述沟槽在中芯棒表面上沿棒体轴向延伸。
5.如权利要求4所述的热管制造方法，其特征在于：所述沟槽一端沿棒体轴向延伸超出其锥形部位。
6.如权利要求3所述的热管制造方法，其特征在于：所述沟槽包括中芯棒表面周向延伸的环形沟槽及沟通该环形沟槽的沿棒体轴向延伸的轴向沟槽。
7.如权利要求3所述的热管制造方法，其特征在于：所述沟槽沿中芯棒周面呈螺旋状延伸。
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