JPS63137565A - Production of porous heat radiator - Google Patents
Production of porous heat radiatorInfo
- Publication number
- JPS63137565A JPS63137565A JP61285279A JP28527986A JPS63137565A JP S63137565 A JPS63137565 A JP S63137565A JP 61285279 A JP61285279 A JP 61285279A JP 28527986 A JP28527986 A JP 28527986A JP S63137565 A JPS63137565 A JP S63137565A
- Authority
- JP
- Japan
- Prior art keywords
- porous
- resin
- porous heat
- model
- pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000000463 material Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012188 paraffin wax Substances 0.000 claims abstract description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 18
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 7
- 239000011496 polyurethane foam Substances 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920001692 polycarbonate urethane Polymers 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 229920000459 Nitrile rubber Polymers 0.000 claims 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims 1
- 229920005549 butyl rubber Polymers 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 229910052697 platinum Inorganic materials 0.000 claims 1
- 229920000728 polyester Polymers 0.000 claims 1
- 229910052718 tin Inorganic materials 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000011800 void material Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 2
- 229910052602 gypsum Inorganic materials 0.000 abstract description 2
- 239000010440 gypsum Substances 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 abstract 1
- 230000009969 flowable effect Effects 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 239000012778 molding material Substances 0.000 abstract 1
- 229920005749 polyurethane resin Polymers 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 26
- 238000001816 cooling Methods 0.000 description 10
- 239000002826 coolant Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は放熱体の製造方法に関する。より詳細には、本
発明は、熱交換器あるいは電子素子の冷却等に用いられ
る放熱体の新規な製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a heat sink. More specifically, the present invention relates to a novel method for manufacturing a heat radiator used for cooling heat exchangers or electronic devices.
従来の技術
一般に、放熱体は各種形状のフィン（突起）や溝を具備
して比表面積を高め、より広い伝熱面積で発熱体と冷却
媒体とを熱的に接続するように構成されている。このた
め、例えば熱交換器、ヒートポンプ、ヒートパイプ等の
各種のフィンチューブでは、伝熱壁の表面に切削加工や
プレス加工を施してフィンや溝を形成したり、あるいは
フィンを溶接やろう付によって取りつけたりする。また
、電子回路等の放熱器（ヒートシンク）では、押し出し
成形、ダイカスト鋳造やプレス加工等によって製造され
るアルミニウム製放熱材が広く利用されている。Conventional technology In general, a heat sink is configured to have fins (protrusions) and grooves of various shapes to increase the specific surface area and thermally connect the heat generating body and the cooling medium with a wider heat transfer area. . For this reason, for example, in various finned tubes such as heat exchangers, heat pumps, and heat pipes, fins and grooves are formed by cutting or pressing the surface of the heat transfer wall, or the fins are welded or brazed. I'll install it. Further, in heat sinks for electronic circuits and the like, aluminum heat dissipating materials manufactured by extrusion molding, die casting, press working, etc. are widely used.
発明が解決しようとする問題点
このような構成の放熱体は、製造工程の自動化等の点で
は有利なので、比較的低コストのものが作製できるが、
伝熱面積は平面投影面積のせいぜい１０倍程度で放熱容
量が小さく、また、一般に重量も大きい。、これは、装
置の小型化・軽量化を目指す現在の各種電子機器の趨勢
にそぐわないものである。Problems to be Solved by the Invention A heat sink having such a configuration is advantageous in terms of automation of the manufacturing process, so it can be manufactured at a relatively low cost.
The heat transfer area is at most about 10 times the planar projected area, so the heat dissipation capacity is small, and the weight is generally large. This is contrary to the current trend of various electronic devices, which aim to make devices smaller and lighter.
そこで、複数の材料から一体的に構成される複合型伝熱
材、例えばハニカム材や三次元織物等の３次元的に展開
した複雑な表面形状を有する部材を放熱体として利用す
ることが考えられている。Therefore, it has been considered to use a composite heat transfer material that is integrally made of multiple materials, such as a honeycomb material or a three-dimensional fabric, which has a complex three-dimensional surface shape, as a heat radiator. ing.
しかしながら、このような放熱材は伝熱壁の表面積こそ
大きいものの、放熱体を構成する部材相互の接続、ある
いは放熱体と発熱体との接続において、相互の接触面積
が小さくなるので接続部分での伝熱抵抗が大きくなって
しまう。このため伝熱面積が大きい割には実質的な放熱
性には優れていない。However, although such a heat dissipation material has a large surface area of the heat transfer wall, the mutual contact area becomes small when connecting the members constituting the heat dissipation body or between the heat dissipation body and the heating element. Heat transfer resistance increases. Therefore, although the heat transfer area is large, the heat dissipation property is not excellent.
また、金属等により形成される多孔質部材は、その表面
積が５００ｍ’／ｍ’〜７５００ｍ’／ｍ’と極めて広
く、熱放散体として好ましいかの如くにも考えられるが
、一般に機械的強度が安定していないので冷却すべき部
材に取り付ける際の取り付は方法に制約がある。In addition, porous members made of metal etc. have an extremely wide surface area of 500 m'/m' to 7,500 m'/m', and may be considered preferable as heat dissipators, but they generally have poor mechanical strength. Since it is not stable, there are restrictions on how it can be attached to the member to be cooled.
そこで本発明の目的は、上記従来技術の問題点を解決、
し、従来熱交換器やヒートシンク等に利用されてきた各
種放熱体よりも放熱性に優れ、且つ取り扱いの容易な新
規な伝熱体の製造方法を提供することにある。Therefore, the purpose of the present invention is to solve the above-mentioned problems of the prior art.
Another object of the present invention is to provide a method for manufacturing a novel heat transfer body that has better heat dissipation properties than various heat dissipation bodies conventionally used in heat exchangers, heat sinks, etc., and is easy to handle.
問題点を解決するための手段
即ち、本発明に従い、内部が流体に対して充分な流通性
を有する多孔型熱放散部と、該多孔型熱放散部と一体に
構成され、冷却すべき部材と相捕的な面を有する中実な
基部とから構成されている多孔型放熱体を製造する方法
であって、前記多孔型熱放散部と同じ形状の多孔質樹脂
と前記基部と同じ形状の樹脂部材とを接合して前記多孔
型放熱体の模型を作製する工程と、鋳型材を該模型に含
浸すると同時に該鋳型材中に埋設する工程と、該鋳型材
中から前記、模型を除去する工程と、該模型を除去され
た該鋳型内の空洞に放熱体材料金属を充填する工程と、
該鋳型を除去する工程とを含むことを特徴とする多孔型
放熱体の製造方法が提供される。Means for solving the problem, that is, according to the present invention, there is provided a porous heat dissipating section whose interior has sufficient fluid circulation, and a member to be cooled that is integrated with the porous heat dissipating section. A method for manufacturing a porous heat dissipating body comprising a solid base having complementary surfaces, the porous resin having the same shape as the porous heat dissipating part and the resin having the same shape as the base. a step of creating a model of the porous heat sink by joining the members, a step of impregnating the model with a mold material and simultaneously embedding it in the mold material, and a step of removing the model from the mold material. and filling a cavity in the mold from which the model has been removed with heat sink material metal;
There is provided a method for manufacturing a porous heat radiator, the method comprising the step of removing the mold.
作用
本発明に従う放熱体の製造方法は、その放熱体の熱放散
部を多孔質部材によって形成していることをその主要な
特徴のひとつとしている。Function One of the main features of the method for manufacturing a heat sink according to the present invention is that the heat dissipation portion of the heat sink is formed of a porous member.
即ち、多孔質部材は、単純な形状の突起（フィン）ある
いは溝を熱放散部とした従来の放熱体よりも遥かに大き
な比表面積を有している。従って、冷却効率も大きく向
上することが期待される。That is, the porous member has a much larger specific surface area than a conventional heat dissipating body whose heat dissipating portion is a simple protrusion (fin) or groove. Therefore, it is expected that the cooling efficiency will also be greatly improved.
但し、熱放散部は、これに触れる冷却媒体の流通を妨げ
るものであってはならない。何故ならば、空気、水等の
冷却媒体が熱放散部の内部に滞留した場合は却って熱の
放散が阻害されるからである。However, the heat dissipation section must not obstruct the flow of the cooling medium that comes into contact with it. This is because if a cooling medium such as air or water stays inside the heat dissipation section, heat dissipation is actually hindered.
熱放散部における流体の流通性は、冷却媒体の粘度、熱
放散部の孔の形状等によって様々に変化するが、本発明
者等は、後述する実施例から考察して、冷却媒体が気体
である場合は多孔質熱放散部が約５０％以上の空間率を
有していることが好ましいことを見出した。但し、これ
はひとつの指標であって、本発明を限定するものではな
い。The flowability of the fluid in the heat dissipation section varies depending on the viscosity of the cooling medium, the shape of the holes in the heat dissipation section, etc., but the inventors have considered from the examples described below that the cooling medium is a gas. It has been found that in some cases it is preferable for the porous heat dissipation portion to have a porosity of about 50% or more. However, this is just one index and does not limit the present invention.
尚、放熱体そのものが熱伝導率の優れた材料で形成され
ていることが好ましいことはいうまでもなく、好ましい
多孔質材料としは、Ａｌ、 Ｃｕ、 Ｆｅ。It goes without saying that the heat sink itself is preferably made of a material with excellent thermal conductivity, and preferred porous materials include Al, Cu, and Fe.
Ｎｉ５２ｎ、 Ｓｎ、 Ｍｇ５Ｔｉ、Ａｕ、 Ａｇ、
Ｐｔ等の殆どの金属を適用することができる。Ni52n, Sn, Mg5Ti, Au, Ag,
Most metals such as Pt can be applied.
また、本発明の放熱体製造方法は、中実の基部を一体に
形成することもその主要な特徴である。Moreover, the main feature of the heat sink manufacturing method of the present invention is that the solid base is integrally formed.
即ち、前述のように、多孔質部材は一般に機械的強度が
不安定であり、冷却すべき部材に、例えばネジ止めする
ことは実際には不可能に近い。これは放熱体として空間
率が増す程甚だしくなる。That is, as described above, porous members generally have unstable mechanical strength, and it is practically impossible to screw them, for example, to a member to be cooled. This becomes more serious as the space ratio increases as a heat sink.
従って、本発明に従って中実の基部を一体に備えること
が実用的な放熱体として必須の条件である。Therefore, according to the present invention, it is essential for a practical heat dissipation body to have a solid base integrally.
また、これも前述のように、多孔質部材の場合は、冷却
すべき部材との接触面積を大きくすることが困難なので
、この点からも、冷却すべき部材と相補的な面を備えた
中実の基部を備えることが望ましい。Also, as mentioned above, in the case of porous members, it is difficult to increase the contact area with the member to be cooled, so from this point of view as well, it is difficult to increase the contact area with the member to be cooled. It is desirable to have a real base.
また、この基部と前述の熱放散部との間の熱伝導を妨げ
ることは、放熱体としての機能を放棄することになる。Moreover, interfering with heat conduction between the base and the above-mentioned heat dissipation section means abandoning the function as a heat dissipation body.
従って、両者は熱伝導を低下することなく一体に構成さ
れていなければならない。Therefore, both must be integrally constructed without reducing heat conduction.
そこで、本発明の好ましい態様に従えば、上述のような
特徴を備えた形状の模型を作製し、これを用いて鋳型を
作製し、更にこの鋳型を用いて放熱体材料金属を鋳込む
ことによって、金属性の多孔型放熱体を一体に形成する
ことができる。Therefore, according to a preferred embodiment of the present invention, a model having the above-mentioned characteristics is created, a mold is created using this, and the metal material for the heat sink is further cast using this mold. , a metal porous heat sink can be integrally formed.
このような本発明に従う方法は、多孔型熱放散部と中実
な基部とが当初より一体に形成されているので、両者の
間の熱伝導は極めて良好であり、また、両者の接着強度
等についても良好な機械的特性が得られる。In the method according to the present invention, since the porous heat dissipation part and the solid base are integrally formed from the beginning, the heat conduction between the two is extremely good, and the adhesive strength between the two is also improved. Good mechanical properties can also be obtained.
また、模型は、鋳型から加熱あるいは薬品による溶解等
によって取り除くことができ、一方、適切な模型を容易
に作製し得る材料が容易に得られる。即ち、好ましい材
料としては、フェノール樹脂、エポキシ樹脂、ポリエス
テル樹脂、ポリエチレン、ポリ塩化ビニル、ＰＶＡ、ポ
リスチレン、ポリプロピレン、ポリアクリルニトリル、
ポリアミド、ポリカーボネートあるいはポリウレタン等
を挙げることができる。Further, the model can be removed from the mold by heating or melting with chemicals, while material from which a suitable model can be easily produced is easily obtained. That is, preferred materials include phenol resin, epoxy resin, polyester resin, polyethylene, polyvinyl chloride, PVA, polystyrene, polypropylene, polyacrylonitrile,
Examples include polyamide, polycarbonate, and polyurethane.
実施例 。Example .
以下、実施例により本発明の詳細な説明するが本発明は
これらに何ら限定されない。Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited thereto.
実施例１
市販の開孔セル構造のポリウレタンフォーム（サイズ１
７０ Ｘ ７０ Ｘ ２０ｍｍ、空間率９８％、平均セ
ル数６ケ／インチ）の片面に市販のパラフィンワックス
板（サイズ１７０ Ｘ７０ Ｘ ６ ｍｍ、融点１２６
℃）をクロロプレン系接着剤により接着して模型を作成
した。Example 1 Commercially available polyurethane foam with open cell structure (size 1
A commercially available paraffin wax board (size 170 x 70 x 6 mm, melting point 126) was placed on one side of 70 x 70 x 20 mm, void ratio 98%, average number of cells 6 cells/inch).
℃) was glued together using a chloroprene adhesive to create a model.
次いでこのような模型を内径２００＋ｎｍ、深さ２３０
ａｎの鉄製容器内に入れこれに鋳造材として鋳造川石こ
うおよび工業用重質炭酸カルシウムの混合物に水を加え
たものを流し込み、振動を加えて該模型の間隙を充填し
た後、硬化させた。Next, such a model was made with an inner diameter of 200+ nm and a depth of 230 nm.
A mixture of cast river gypsum and industrial heavy calcium carbonate with water was poured into it as a casting material, and after vibration was applied to fill the gaps in the model, it was hardened.
その後電気炉中で温度１５０℃にて１２時間加熱してか
ら、さらに温度６５０℃にて６時間加熱して模型を消失
させて鋳型を得た。Thereafter, it was heated in an electric furnace at a temperature of 150°C for 12 hours, and then further heated at a temperature of 650°C for 6 hours to eliminate the model and obtain a mold.
次に、真空中でこの鋳型にアルミニウム合金（ＡＣ２Ａ
）を鋳込み冷却した後、鉄製容器から鋳造物を取り出
し、５Ｎの硝酸中に浸漬して鋳型材を除去し水洗した。Next, aluminum alloy (AC2A) was placed in this mold in vacuum.
) was cast and cooled, the casting was taken out from the iron container, immersed in 5N nitric acid to remove the mold material, and washed with water.
こうして、第１図に示したような中実金属部分ｌおよび
多孔性金属部分２を有するヒートシンクを作製した。In this way, a heat sink having a solid metal portion 1 and a porous metal portion 2 as shown in FIG. 1 was manufactured.
実施例２
市販の開孔セル構造のポリウレタンフォーム（サイズ１
００Ｘ １００Ｘ ２００ｍｍ＞の片面に市販のＰＭＭ
Ａ板（ポリメタクリル酸メチル板、サイズ１００×２０
０×６１１ＩＩ１１）をクロロプレン系接着剤を用いて
接着して模型を作成した以外は、実施例１と同様にして
鋳型を作成しアルミニウム合金を鋳込んでから冷却し、
模型と同形状の中実金属部分および多孔性金属部分を有
するヒートシンクを得た。Example 2 Commercially available polyurethane foam with open cell structure (size 1
Commercially available PMM on one side of 00X 100X 200mm
A plate (polymethyl methacrylate plate, size 100 x 20
A mold was created in the same manner as in Example 1, except that a model was created by adhering 0x611II11) using a chloroprene adhesive, and the aluminum alloy was poured in and cooled.
A heat sink having a solid metal part and a porous metal part having the same shape as the model was obtained.
実施例３
ステンレス容器内（サイズ３００ Ｘ ２００ Ｘ １
５ ｍｍ”）に溶融したポリエチレンを入れておき、こ
れに開孔セル構造を有するポリウレタンフォームの一部
を浸漬し、ポリエチレンを冷却して凝固させ、その後容
器内からポリエチレンの付着したポリウレタンフォーム
を取り出して模型を得た以外は、実施例１と同様にして
鋳型を作成しアルミニウム合金を鋳込んでから冷却し模
型と同形状の中実金属部分および多孔性金属部分を有す
るヒートシンクを得た。Example 3 Inside a stainless steel container (size 300 x 200 x 1
A portion of polyurethane foam with an open cell structure is immersed in the molten polyethylene (5 mm"), and the polyethylene is cooled and solidified. After that, the polyurethane foam with the polyethylene attached is removed from the container. A mold was prepared in the same manner as in Example 1, except that a model was obtained. An aluminum alloy was cast and then cooled to obtain a heat sink having a solid metal part and a porous metal part having the same shape as the model.
実施例４
外径３５ｍｍ、内径３０ｍｍ、長さ１５０ｍｍのアクリ
ルパイプ内に外径３３ｍｍ、長さ１５０ｍｍの開孔セル
構造を有する円筒形のポリウレタンフォーム（平均セル
数８ケ／インチ）を装入して模型を作成した。Example 4 A cylindrical polyurethane foam (average number of cells 8 cells/inch) having an open cell structure with an outer diameter of 33 mm and a length of 150 mm was charged into an acrylic pipe with an outer diameter of 35 mm, an inner diameter of 30 mm, and a length of 150 mm. A model was created.
この模型を用いて実施例１と同様の方法で鋳型を作成し
た後に、真空中でアルミニウム合金（ＡＣ４Ｃ）ｌ）を
鋳型の前記模型と同形状の空隙内に鋳込んだ。A mold was created using this model in the same manner as in Example 1, and then an aluminum alloy (AC4C) was cast in vacuum into a void having the same shape as the model.
その後鋳造物と鉄製容器内から取り出し、５Ｎの硝酸中
に浸漬して鋳型材を除去し、水洗いした所、模型と同形
状のアルミニウム合金製の放熱管が得られた。ここで、
前記以外の発泡樹脂、プラスチック、金属（合金）も利
用可能な事は言うまでもない。また、真空鋳造ではなく
加圧鋳造による方法も当然可能である。なお、本例のよ
うな管内に多孔質金属を有する形状の物はフィルター、
デミスタ−等にも利用可能である。Thereafter, the cast product and the iron container were taken out, immersed in 5N nitric acid to remove the mold material, and washed with water, yielding an aluminum alloy heat dissipation tube having the same shape as the model. here,
Needless to say, foamed resins, plastics, and metals (alloys) other than those mentioned above can also be used. Naturally, a method using pressure casting instead of vacuum casting is also possible. Note that a tube with a porous metal inside the tube like this example is a filter,
It can also be used as a demister etc.
動作試験
作製例１に示した方法で、多孔性金属部分（サイズ１４
５ Ｘ７５ Ｘ４４ｍｍ、空間率９７％、平均セル数６
ケ／インチ）部分と中実金属部分（サイズ１４５×７５
Ｘ６ｍｍ）からなるアルミニウム製放熱器（重量２００
ｇ）を製作した。この放熱器にトランジスタを取り付け
、温度６５℃の恒温室内で放熱試験を行った所、強制空
冷の場合３６０ Ｗ 、強制空冷なしの場合９０Ｗの電
力消費があってもトランジスタの表面温度は１００℃以
下であった。即ち、本放熱器は自然空冷時には９０Ｗ１
強制空冷時には３６０Ｗの放熱性能を有していたことに
なる。A porous metal part (size 14
5 x 75 x 44mm, void ratio 97%, average number of cells 6
(inch) part and solid metal part (size 145 x 75
x6mm) aluminum heat sink (weight 200mm)
g) was produced. When a transistor was attached to this heat sink and a heat dissipation test was conducted in a thermostatic chamber at a temperature of 65 degrees Celsius, the surface temperature of the transistor was below 100 degrees Celsius even though the power consumption was 360 W with forced air cooling and 90 W without forced air cooling. Met. In other words, this radiator has a power output of 90W1 during natural air cooling.
This means that it had a heat dissipation performance of 360W during forced air cooling.
また、比較のために、一般にトランジスタ冷却用に用い
られている押し出し成形による市販のアルミニウム製放
熱器（材質Ａ１０７０、サイズ１４５Ｘ７５Ｘ５０ｍｍ
、重量４８５ ｇ ）についても同様の試験を行った。For comparison, a commercially available extruded aluminum heat sink (material: A1070, size: 145 x 75 x 50 mm), which is generally used for transistor cooling, is also included.
, weight 485 g).
この放熱器はアルミニウム板に７５Ｘ４５Ｘ１．５ｍｍ
のフィンが等間際で２４枚設けられているものである。This heatsink is made of aluminum plate with dimensions of 75X45X1.5mm.
24 fins are provided at equal distances.
この放熱器を、前述にトランジスタを取り付けて、同様
にトランジスタの動作中の温度を測定して冷却性能を測
定した。この放熱器は、自然空冷時には４５Ｗ、強制空
冷時には１８０ Ｗの放熱性能を示した。A transistor was attached to this heatsink as described above, and the temperature during operation of the transistor was similarly measured to measure the cooling performance. This radiator exhibited a heat dissipation performance of 45 W during natural air cooling and 180 W during forced air cooling.
このように、本発明に従って作製された放熱器は従来の
ものよりも極めて優れた放熱性能を有している。As described above, the heat radiator manufactured according to the present invention has extremely superior heat dissipation performance than conventional ones.
発明の効果
以上詳述の如く、本発明に従う放熱体の製造方法によれ
ば、極めて優れた放熱性能を有し、また実用上の取り扱
いも容易な放熱体を有利に製造することができる。Effects of the Invention As detailed above, according to the method for manufacturing a heat sink according to the present invention, it is possible to advantageously manufacture a heat sink that has extremely excellent heat radiation performance and is easy to handle in practical use.
即ち、加工の容易な樹脂材料によって適切な形状の模型
を作製し、これに基づいて鋳型を形成し、更にこの鋳型
に金属材料を鋳込むことによって、複雑な形状の放熱体
を容易且つ高品質に作製することができる。In other words, by making a model of an appropriate shape from a resin material that is easy to process, forming a mold based on this model, and then casting a metal material into this mold, a heat sink with a complex shape can be manufactured easily and with high quality. It can be made into
即ち、熱放散体は多孔質部材として形成されるので、放
熱体の比表面積が極めて大きく、冷却媒体に対して効率
よく熱を放散する。一方、中実な基部を備えているので
、冷却すべき部材への取りつけも容易であり、また取り
付は後も機械的に安定している。また、この中実部が被
冷却部材と放熱体との間に介在しているので、被冷却部
材の熱は有効に発熱体に伝導される。That is, since the heat dissipation body is formed as a porous member, the specific surface area of the heat dissipation body is extremely large, and the heat dissipation body efficiently dissipates heat to the cooling medium. On the other hand, since it has a solid base, it is easy to attach it to the member to be cooled, and the attachment remains mechanically stable. Further, since this solid portion is interposed between the member to be cooled and the heat radiating body, the heat of the member to be cooled is effectively conducted to the heat generating body.
更に、多孔質部材は、その嵩に対して空間率が大きく、
極めて軽量に放熱体を構成できる。従って、本発明に従
う放熱体は、軽量化あるいは小型化の要求される電子製
品に好適に利用することができる。Furthermore, the porous member has a large void ratio relative to its bulk;
The heat sink can be configured to be extremely lightweight. Therefore, the heat sink according to the present invention can be suitably used in electronic products that require reduction in weight or size.
第１図は、本発明に従う放熱体の構成を概略的に示す斜
視図である。
〔参照番号〕
１・・中実金属部分
２・・多孔性金属部分FIG. 1 is a perspective view schematically showing the configuration of a heat sink according to the present invention. [Reference number] 1. Solid metal portion 2. Porous metal portion
Claims (7)
熱放散部と、該多孔型熱放散部と一体に構成され、冷却
すべき部材と相補的な面を有する中実な基部とから構成
されている多孔型放熱体を製造する方法であって、 前記多孔型熱放散部と同じ形状の多孔質樹脂と前記基部
と同じ形状の樹脂部材とを接合して前記多孔型放熱体の
模型を作製する工程と、 鋳型材を該模型に含浸すると同時に該鋳型材中に埋設す
る工程と、 該鋳型材中から前記模型を除去する工程と、該模型を除
去された該鋳型内の空洞に放熱体材料金属を充填する工
程と、 該鋳型を除去する工程と を含むことを特徴とする多孔型放熱体の製造方法。(1) A porous heat dissipating section whose interior has sufficient fluid circulation, and a solid base that is integrated with the porous heat dissipating section and has a surface complementary to the member to be cooled. A method for manufacturing a porous heat dissipating body comprising: a porous resin having the same shape as the porous heat dissipating portion and a resin member having the same shape as the base; a step of making a model; a step of impregnating the model with a mold material and simultaneously embedding it in the mold material; a step of removing the model from the mold material; and a step of forming a cavity in the mold from which the model has been removed. 1. A method for manufacturing a porous heat radiator, the method comprising the steps of: filling a heat radiator material metal; and removing the mold.
ことを特徴とする特許請求の範囲第１項に記載の多孔型
放熱体の製造方法。(2) The method for manufacturing a porous heat radiator according to claim 1, wherein the porous resin has a porosity of 50% or more.
、Ｚｎ、Ｓｎ、Ｍｇ、Ｔｉ、Ａｕ、Ａｇ、Ｐｔあるいは
それらの合金から形成されていることを特徴とする特許
請求の範囲第１項または第２項に記載の多孔型放熱体の
製造方法。(3) The heat sink material metal is Al, Cu, Fe, Ni
, Zn, Sn, Mg, Ti, Au, Ag, Pt, or an alloy thereof.
リエステル樹脂、ポリエチレン、ポリ塩化ビニル、ＰＶ
Ａ、ポリスチレン、ポリプロピレン、ポリアクリルニト
リル、ポリアミド、ポリカーボネートあるいはポリウレ
タンによって形成することを特徴とする特許請求の範囲
第１項乃至第３項のいずれか１項に記載の多孔型放熱体
の製造方法。(4) The model can be made of phenol resin, epoxy resin, polyester resin, polyethylene, polyvinyl chloride, PV
The method for producing a porous heat sink according to any one of claims 1 to 3, characterized in that the porous heat sink is formed from A, polystyrene, polypropylene, polyacrylonitrile, polyamide, polycarbonate, or polyurethane.
とパラフィンワックス板とを接着剤で接合して形成する
ことを特徴とする特許請求の範囲第１項乃至第３項のい
ずれか１項に記載の多孔型放熱体の製造方法。(5) The model is formed by bonding a polyurethane foam with an open cell structure and a paraffin wax board with an adhesive, according to any one of claims 1 to 3. A method for manufacturing a porous heat sink.
とポリメタクリル酸メチル板とを接着剤で接合して形成
することを特徴とする特許請求の範囲第１項乃至第３項
のいずれか１項に記載の多孔型放熱体の製造方法。(6) Any one of claims 1 to 3, wherein the model is formed by bonding a polyurethane foam with an open cell structure and a polymethyl methacrylate plate with an adhesive. A method for manufacturing a porous heat sink as described in .
、ブチルゴム系、エポキシ系、ポリウレタン系、ポリエ
ステル系、塩化ビニル系あるいはポリアミド系の接着剤
であることを特徴とする特許請求の範囲第６項あるいは
第７項に記載の多孔型放熱体の製造方法。(7) Claim 6, characterized in that the adhesive is a chloroprene-based, nitrile rubber-based, butyl rubber-based, epoxy-based, polyurethane-based, polyester-based, vinyl chloride-based, or polyamide-based adhesive. Alternatively, the method for manufacturing a porous heat sink according to item 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61285279A JPS63137565A (en) | 1986-11-30 | 1986-11-30 | Production of porous heat radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61285279A JPS63137565A (en) | 1986-11-30 | 1986-11-30 | Production of porous heat radiator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63137565A true JPS63137565A (en) | 1988-06-09 |
Family
ID=17689455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61285279A Pending JPS63137565A (en) | 1986-11-30 | 1986-11-30 | Production of porous heat radiator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63137565A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0452046A (en) * | 1990-06-19 | 1992-02-20 | Toyama Pref Gov | Manufacture of metal porous body in collapsible mold |
| JP2001232444A (en) * | 2000-01-10 | 2001-08-28 | General Electric Co <Ge> | Casting having high heat transfer surface, and mold and pattern for forming the same |
| CN100464914C (en) * | 2007-10-12 | 2009-03-04 | 西北有色金属研究院 | Metal fiber polyporous material subsequent processing method |
| JP2014064035A (en) * | 2008-06-30 | 2014-04-10 | Alcatel-Lucent Usa Inc | Structurally complicated monolithic heat sink design |
-
1986
- 1986-11-30 JP JP61285279A patent/JPS63137565A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0452046A (en) * | 1990-06-19 | 1992-02-20 | Toyama Pref Gov | Manufacture of metal porous body in collapsible mold |
| JP2001232444A (en) * | 2000-01-10 | 2001-08-28 | General Electric Co <Ge> | Casting having high heat transfer surface, and mold and pattern for forming the same |
| CN100464914C (en) * | 2007-10-12 | 2009-03-04 | 西北有色金属研究院 | Metal fiber polyporous material subsequent processing method |
| JP2014064035A (en) * | 2008-06-30 | 2014-04-10 | Alcatel-Lucent Usa Inc | Structurally complicated monolithic heat sink design |
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