JPH01272706A - Carbon mold for hot press - Google Patents
Carbon mold for hot pressInfo
- Publication number
- JPH01272706A JPH01272706A JP9892188A JP9892188A JPH01272706A JP H01272706 A JPH01272706 A JP H01272706A JP 9892188 A JP9892188 A JP 9892188A JP 9892188 A JP9892188 A JP 9892188A JP H01272706 A JPH01272706 A JP H01272706A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- carbon
- cooling
- carbon mold
- hot press
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000007731 hot pressing Methods 0.000 description 12
- 239000003575 carbonaceous material Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000843 powder Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、常圧下、あるいは減圧下においてセラミッ
ク又は金属等の圧着、焼結に使用するホットプレス装置
の炉芯部を構成するホットプレス用カーボン鋳型に関す
る。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a hot press that constitutes the furnace core of a hot press device used for crimping and sintering ceramics, metals, etc. under normal pressure or reduced pressure. Regarding carbon molds.
（従来の技術）
ホットプレス装置は、セラミックや金属、あるいは複合
材料などの粉体あるいは仮成形体を加圧焼結するのに広
く使用されている。(Prior Art) Hot press apparatuses are widely used for pressurizing and sintering powders or temporary compacts of ceramics, metals, composite materials, and the like.
このホットプレス装置の炉芯部は、一般的には第１図に
示すように、被焼結体（４）を充填する筒形状のカーボ
ン鋳型（１）と、発熱体（誘導加熱ではコイル、抵抗加
熱ではヒーター）（２）と、断熱材（３）と、スペーサ
（５）と、押棒（６）及び押台（７）により構成されて
いる。As shown in Fig. 1, the furnace core of this hot press device generally consists of a cylindrical carbon mold (1) filled with a material to be sintered (4), a heating element (in induction heating, a coil, In resistance heating, it is composed of a heater (2), a heat insulating material (3), a spacer (5), a push rod (6), and a push stand (7).
このカーボン鋳型（１）は、最大２５００℃まで加熱さ
れ、同時に加圧される。また、ホットプレス加工した製
品を取り出す場合には、３００℃以下に冷却される。This carbon mold (1) is heated to a maximum of 2500°C and is simultaneously pressurized. Further, when the hot-pressed product is taken out, it is cooled to 300° C. or lower.
このため、ホットプレス加工の生産性を上げるためには
、カーボンｔ［（１）の加熱あるいは冷却を早く行なえ
るようにする必要があり、このような技術として従来、
例えば、実開昭８１−１８３９２１号公報に記載されて
いるように、冷却ファンを用いて冷却媒体で加熱室内を
強制循環させるホットプレス装置がある。Therefore, in order to increase the productivity of hot press processing, it is necessary to be able to quickly heat or cool carbon t[(1).
For example, as described in Japanese Utility Model Application Publication No. 81-183921, there is a hot press device that uses a cooling fan to forcefully circulate a cooling medium in a heating chamber.
（発明が解決しようとする課題）
しかしながら、冷却媒体の強制循環による炉内の冷却の
みでは、カーボン鋳型の冷却速度に限界があり、より効
率的に炉芯部の冷却を行なうことができず、冷却速度を
高めようとすれば、装置の複雑化と大型化のためコスト
高となり、またメンテナンスを必要とする等の問題があ
ワた。(Problems to be Solved by the Invention) However, if the inside of the furnace is cooled only by forced circulation of a cooling medium, there is a limit to the cooling rate of the carbon mold, and the furnace core cannot be cooled more efficiently. If an attempt was made to increase the cooling rate, the equipment would become more complex and larger, leading to higher costs and the need for maintenance, among other problems.
この発明は、このような事情に鑑みなされたものであり
、カーボン鋳型を構成する黒鉛の持つ機械加工性の良さ
に着目し、冷却効果の優れた、生産性向ヒに役立つホッ
トプレス用カーボン鋳型を提供しようとするものである
。This invention was made in view of these circumstances, and focused on the good machinability of graphite that constitutes carbon molds, and created a carbon mold for hot pressing that has an excellent cooling effect and is useful for improving productivity. This is what we are trying to provide.
（ｆＩＷＩを解決するための手段）
すなわち、本発明に係るカーボン鋳型は、「ホットプレ
ス装置の炉芯部を構成する筒形状のカーボン鋳型の表面
に冷却用フィンを設けてなるもの」と「ホットプレス装
置の炉芯部を構成する筒形状のカーボン鋳型の表面に凹
凸を設けてなるもの」とである。(Means for solving fIWI) In other words, the carbon mold according to the present invention is a carbon mold in which cooling fins are provided on the surface of a cylindrical carbon mold constituting the furnace core of a hot press machine, and a hot It is made by providing irregularities on the surface of a cylindrical carbon mold that constitutes the furnace core of a press device.
冷却用フィン又は凹凸は、カーボン鋳型と一体に形成さ
れ、カーボン鋳型の材料であるカーボンブロックから切
り出され、加工されるのが最も好ましい、しかしながら
、冷却用フィンについては別個に加工し、カーボン鋳型
の使用時に取りつけるようにしてもよい、この場合、冷
却用フィンの材料としては、カーボンの他に炭化珪素等
のセラミックスや耐熱合金を用いてもよい。It is most preferable that the cooling fins or asperities are formed integrally with the carbon mold and are cut out and machined from a carbon block that is the material of the carbon mold. The cooling fins may be attached during use. In this case, the cooling fins may be made of ceramics such as silicon carbide or heat-resistant alloys in addition to carbon.
又、冷却用フィンについては、冷却用フィンの間の気体
の流通をよくするため、冷却用フィンの任意の場所に任
意の数だけ穴を設けてもよい。Further, regarding the cooling fins, an arbitrary number of holes may be provided at arbitrary locations on the cooling fins in order to improve gas flow between the cooling fins.
冷却フィンの形状はホットプレス鋳型の表面に沿って波
形状やパルス形状、あるいはプロペラ状やタービンブレ
ート状、あるいは螺旋状などの任意の形態で設けられて
もよいが、加工コストの点からは、ホットプレス鋳型の
軸方向又は軸に垂直方向に多層に設け、フラットの面を
持ったものが好ましい。The cooling fins may have any shape along the surface of the hot press mold, such as a wave shape, a pulse shape, a propeller shape, a turbine blade shape, or a spiral shape, but from the viewpoint of processing cost, It is preferable that the mold be provided in multiple layers in the axial direction of the hot press mold or in a direction perpendicular to the axis and have a flat surface.
次に、冷却用フィン又は凹凸の深さについては、大きい
ほど伝熱面積が増えて好ましいが１作業効率及びコスト
の点から、冷却用フィン間又は凹凸間の距離の０．１倍
〜５．０倍の範囲にあると良い。Next, regarding the depth of the cooling fins or the unevenness, the larger the depth, the better the heat transfer area increases, but from the viewpoint of work efficiency and cost, the depth is 0.1 to 5.5 times the distance between the cooling fins or the unevenness. It is good if it is in the 0x range.
筒形状のカーボン鋳型は円筒形状のものに限らず、たと
えば矩形状などのいろいろな角筒形状のほか、用途に応
じて各種自由形状のものも適用される。The cylindrical carbon mold is not limited to a cylindrical shape, and may have various angular cylinder shapes such as a rectangular shape, as well as various free shapes depending on the purpose.
（発明の作用）
本発明に係るホットプレス用カーボン鋳型は、その表面
に冷却用フィン又は凹凸を設けることにより次のような
作用がある。(Actions of the Invention) The carbon mold for hot press according to the present invention has the following effects by providing cooling fins or irregularities on its surface.
まず、ホットプレス加工後、カーボン鋳型を冷却する際
に冷却用フィン又は凹凸によって、その冷却速度を早め
る作用がある。First, when cooling the carbon mold after hot pressing, the cooling fins or unevenness have the effect of accelerating the cooling rate.
又、冷却用フィン又は凹凸の表面積の調整によって、加
熱、加圧処理中のホットプレス用カーボン鋳型からの熱
の放散を調節する作用がある。Further, by adjusting the surface area of the cooling fins or the unevenness, there is an effect of adjusting the radiation of heat from the hot press carbon mold during heating and pressure treatment.
その他にも、カーボン鋳型を長期間使用することによっ
て、侵入した空気や水蒸気などと酸化反応を起こすこと
が考えられるが、本発明の冷却用フィンの場合、侵入空
気等が冷却用フィンと選択時に反応して、強度保持の点
で重要なカーボン鋳型厚肉部の酸化を防止する。In addition, when a carbon mold is used for a long period of time, oxidation reactions may occur with the intruding air and water vapor. However, in the case of the cooling fins of the present invention, the intruding air, etc. This reaction prevents oxidation of the thick walled parts of the carbon mold, which is important for maintaining strength.
（実施例） 次に、本発明を実施例によって具体的に説明する。(Example) Next, the present invention will be specifically explained using examples.
実施例１
第２図に示すように、外径３５０ｍｍφ、内径１５０ｍ
ｍφ、高さ３５０ ｍｍ、冷却フィン（８）の数３２枚
、冷却フィン（８）の深さ３５ｍｍのカ−ボン材料の一
体物から成るホットプレス用カーボン鋳型（１）を２個
作製した。Example 1 As shown in Fig. 2, the outer diameter is 350 mmφ and the inner diameter is 150 m.
Two hot-pressing carbon molds (1) were prepared, each made of a single piece of carbon material, each having a diameter of 350 mm, a cooling fin (8) of 32 pieces, and a cooling fin (8) depth of 35 mm.
一方、冷却フィンのない同質のカーボン材料からなる外
径３５０ｍｍφ、内径１５０ｍｍφ、高さ３５０ｍｍの
カーボン鋳型を比較例として、これらを窒化珪素の粉体
のホットプレス加工に使用した。On the other hand, a carbon mold having an outer diameter of 350 mmφ, an inner diameter of 150 mmφ, and a height of 350 mm made of a homogeneous carbon material without cooling fins was used as a comparative example for hot pressing of silicon nitride powder.
この結果、実施例１のカーボン鋳型は比較例のカーボン
鋳型に比べ、冷却時間がｌ／２に短縮し、寿命は１．５
倍に伸び、製品の品質のバラツキも少なくなった。As a result, compared to the carbon mold of Comparative Example, the cooling time of the carbon mold of Example 1 was shortened to 1/2, and the life span was 1.5
It has doubled in size, and there is less variation in product quality.
実施例２
第３図に示すように、外径３５０ｍｍφ、内径１５０ｍ
ｍφ、高さ３５０ｍｍ、冷却フィン（８）の数１８枚、
冷却フィン（８）の深さ３５ｍｍのカーボン材料の一体
物から成るホットプレス用カーボン鋳型（１）を２個作
製した。Example 2 As shown in Fig. 3, the outer diameter is 350 mmφ and the inner diameter is 150 m.
mφ, height 350mm, number of cooling fins (8): 18,
Two hot-pressing carbon molds (1) each consisting of a single piece of carbon material with cooling fins (8) having a depth of 35 mm were produced.
一方、冷却フィンのない同質のカーボン材料からなる外
径３５０ ｍ ｍφ、内径１５０ｍｍφ、高さ３５０
ｍ ｍのカーボン鋳型を比較例として、これらをアルミ
ナの粉体のホットプレス加工に使用した。On the other hand, it is made of the same carbon material without cooling fins and has an outer diameter of 350 mmφ, an inner diameter of 150 mmφ, and a height of 350 mm.
mm carbon molds were used as a comparative example for hot pressing of alumina powder.
この結果、実施例２のカーボン鋳型は比較例のカーボン
鋳型に比べ、冷却時間が２７３に短縮し、寿命は２倍に
伸び、製品の品質のバラツキも少なくなった。As a result, compared to the carbon mold of Comparative Example, the cooling time of the carbon mold of Example 2 was shortened to 273, the lifespan was doubled, and the variation in product quality was reduced.
実施例３
第４図に示すように、外径寸法が４００ ｍ ｍ Ｘ３
００ｍｍＸ２００ｍｍ、肉厚１００ｍｍ、冷却フィンの
数２０枚、冷却フィンの深さ４０ｍｍのカーボン材料の
一体物から成るホットプレス用カーボン鋳型（１）を２
ｆ１１作製した。Example 3 As shown in Fig. 4, the outer diameter is 400 mm x 3
Two carbon molds (1) for hot pressing are made of a single piece of carbon material measuring 00 mm x 200 mm, wall thickness 100 mm, number of cooling fins 20, and cooling fin depth 40 mm.
f11 was created.
一方、冷却フィンのない同質のカーボン材料からなる外
径寸法が４００ｍｍＸ３００ｍｍＸ２００ｍｍ、肉厚１
００ｍｍのカーボン鋳型を比較例として、珪素合金粉体
のホットプレス加工に使用した。On the other hand, it is made of a homogeneous carbon material without cooling fins and has an outer diameter of 400 mm x 300 mm x 200 mm and a wall thickness of 1.
A 00 mm carbon mold was used as a comparative example for hot pressing of silicon alloy powder.
この結果、実施例３のカーボン鋳型は比較例のカーボン
鋳型に比べ、冷却時間がｌ／２に短縮し、寿命は２倍に
伸び、製品の品質のバラツキも少なくなった。As a result, compared to the carbon mold of Comparative Example, the cooling time of the carbon mold of Example 3 was reduced to 1/2, the lifespan was doubled, and the variation in product quality was reduced.
実施例４
外径３５０ ｍ ｍφ、内径１５０ｍｍφ、高さ３５０
ｍ ｍ 、凹凸の数４５個、凹凸の深さ３５ ｍ ｍ
のカーボン材料の一体物から成るホットプレス用カーボ
ン鋳型を２個作製した。Example 4 Outer diameter 350mmφ, inner diameter 150mmφ, height 350mm
m m, number of unevenness: 45, depth of unevenness: 35 mm
Two hot-pressing carbon molds made of one piece of carbon material were manufactured.
一方、凹凸のない同質のカーボン材料からなる外径３５
０ｍｍφ、内径１５０ｍｍφ、高さ３５０ｍｍのカーボ
ン鋳型を比較例として、これらを炭化珪素の粉体のホッ
トプレス加工に使用した。On the other hand, the outer diameter 35 is made of a homogeneous carbon material with no unevenness.
A carbon mold having a diameter of 0 mmφ, an inner diameter of 150 mmφ, and a height of 350 mm was used as a comparative example for hot pressing of silicon carbide powder.
この結果、実施例４のカーボン鋳型は比較例のカーボン
鋳型に比べ、冷却時間が２／３に短縮し、寿命は１．５
倍に伸び、製品の品質のバラツキも少なくなった。As a result, the cooling time of the carbon mold of Example 4 was shortened to 2/3 compared to the carbon mold of Comparative Example, and the life span was 1.5%.
It has doubled in size, and there is less variation in product quality.
（発明の効果）
以上説明したように、本発明に係るホットプレス用カー
ボン鋳型は、従来のカーボン鋳型にくらべ、冷却速度が
大きく、その結果、ホットプレス工程の時間短縮が図れ
、生産性の向上に大きく寄与する。又、放熱なｔＡＷｉ
シて均熱性を増すことかできるため、製品の品質のバラ
ツキを少なくして、同時にカーボン鋳型の寿命ものばす
ことができる。(Effects of the Invention) As explained above, the carbon mold for hot pressing according to the present invention has a higher cooling rate than conventional carbon molds, and as a result, the time for the hot pressing process can be shortened, and productivity can be improved. greatly contributes to In addition, heat dissipation tAWi
Since it is possible to improve heat uniformity by reducing the temperature difference, it is possible to reduce variations in product quality and at the same time extend the life of the carbon mold.
【図面の簡単な説明】
第１図はホットプレス装置の炉芯部を示す断面図、第２
図は本発明に係るカーボン鋳型の一実施例を示す斜視図
、第３図は本発明に係るカーボン鋳型の別の実施例を示
す斜視図、第４図は本発明に係るカーボン鋳型のさらに
別の実施例を示す斜視図である。
符号の説明
ｌ・・・カーボン鋳型、
２・・・発熱体（誘導加熱ではコイル、抵抗加熱ではヒ
ーター）、
３・・・断熱材、
４・・・被焼結体、
５・・・スペーサ、
６・・・押棒、
７・・・押台。
特許出願人 イビデン株式会社
第１図
第２図
第３図
第４図
一ゝ−−２[Brief explanation of the drawings] Figure 1 is a sectional view showing the furnace core of the hot press equipment, Figure 2
The figure is a perspective view showing one embodiment of the carbon mold according to the present invention, FIG. 3 is a perspective view showing another embodiment of the carbon mold according to the present invention, and FIG. 4 is a perspective view showing another embodiment of the carbon mold according to the present invention. It is a perspective view showing an example of this. Explanation of symbols l...Carbon mold, 2...Heating element (coil for induction heating, heater for resistance heating), 3...Insulating material, 4...Sintered body, 5...Spacer, 6...Push bar, 7...Push stand. Patent applicant: IBIDEN Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 1--2
Claims (1)
ボン鋳型であって、表面に冷却用フィンを設けてなるこ
とを特徴とするホットプレス用カーボン鋳型。 ２）ホットプレス装置の炉芯部を構成する筒形状のカー
ボン鋳型であって、表面に凹凸を設けてなることを特徴
とするホットプレス用カーボン鋳型。[Scope of Claims] 1) A carbon mold for a hot press, which is a cylindrical carbon mold constituting a furnace core of a hot press device, and is characterized in that the mold has cooling fins provided on its surface. 2) A carbon mold for a hot press, which is a cylindrical carbon mold constituting a furnace core of a hot press device, and is characterized by having an uneven surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9892188A JPH01272706A (en) | 1988-04-21 | 1988-04-21 | Carbon mold for hot press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9892188A JPH01272706A (en) | 1988-04-21 | 1988-04-21 | Carbon mold for hot press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01272706A true JPH01272706A (en) | 1989-10-31 |
Family
ID=14232590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9892188A Pending JPH01272706A (en) | 1988-04-21 | 1988-04-21 | Carbon mold for hot press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01272706A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57106447A (en) * | 1980-12-25 | 1982-07-02 | Seiko Epson Corp | Mold for rare earth magnet |
| JPS58215304A (en) * | 1982-06-09 | 1983-12-14 | 株式会社日本自動車部品総合研究所 | Hot press die |
-
1988
- 1988-04-21 JP JP9892188A patent/JPH01272706A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57106447A (en) * | 1980-12-25 | 1982-07-02 | Seiko Epson Corp | Mold for rare earth magnet |
| JPS58215304A (en) * | 1982-06-09 | 1983-12-14 | 株式会社日本自動車部品総合研究所 | Hot press die |
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