JPH0957495A - Cip forming die - Google Patents
Cip forming dieInfo
- Publication number
- JPH0957495A JPH0957495A JP21336095A JP21336095A JPH0957495A JP H0957495 A JPH0957495 A JP H0957495A JP 21336095 A JP21336095 A JP 21336095A JP 21336095 A JP21336095 A JP 21336095A JP H0957495 A JPH0957495 A JP H0957495A
- Authority
- JP
- Japan
- Prior art keywords
- soft material
- mold
- cip
- molding
- molding die
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粉体を冷間静水圧
加圧(Cold Isostatic Press:CIP)して成形体を得るため
のＣＩＰ成形型に係り、詳しくは、加圧成形後の減圧時
における成形体のクラック等の欠陥の発生の問題がな
く、良好な成形体を歩留り良く成形することができるＣ
ＩＰ成形型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CIP mold for obtaining a molded product by cold isostatic pressing (CIP) of powder, and more specifically, to decompression after pressure molding. There is no problem of generation of defects such as cracks of the molded product at the time, and a good molded product can be molded with high yield C
It relates to an IP mold.
【０００２】[0002]
【従来の技術】セラミックス等の各種粉体の成形方法と
してＣＩＰ成形法が知られている。ＣＩＰ成形法は、成
形型内に粉体を充填し、水又は油等の加圧媒体を介して
該成形型を外方から等方的に加圧して成形する方法であ
り、使用される成形型の少なくとも一部は、ゴム等の可
撓性を有した軟質材料で構成されている。成形に使用さ
れる粉体は、通常、スプレードライ造粒粉などの流動性
の良い球状顆粒である。CIP molding is known as a method for molding various powders such as ceramics. The CIP molding method is a method in which powder is filled in a molding die and isotropically pressurized from the outside through a pressure medium such as water or oil to mold the molding die. At least a part of the mold is made of a flexible soft material such as rubber. The powder used for molding is usually spherical granules having good fluidity such as spray-dried granulated powder.
【０００３】図１（ａ）〜（ｃ）は一般的なＣＩＰ成形
型を示す断面図である。図１（ａ）は、円柱形成形体を
成形するための成形型１を示し、この成形型１はその全
体がゴム製のものであり、成形型１の側周部を構成する
ゴム筒型２と、上面及び下面を構成するゴム蓋型３及び
ゴム底型４とで構成されている。図１（ｂ）はリング形
状の成形体を成形するための成形型５を示し、この成形
型５は、側周部のみがゴム製とされたものであり、ゴム
筒型６と蓋金型７及びコア金型８とで構成されている。
図１（ｃ）は角サヤのような容器形状の成形体を成形す
るための成形型９を示し、この成形型９は底部及び中子
部分のみが金属製であり、ゴム筒型１０、ゴム蓋型１１
及びコア金型１２で構成されている。1A to 1C are sectional views showing a general CIP mold. FIG. 1 (a) shows a molding die 1 for molding a columnar molded body, and the molding die 1 is entirely made of rubber, and a rubber tubular mold 2 constituting a side peripheral portion of the molding die 1. And a rubber lid mold 3 and a rubber bottom mold 4 that form the upper surface and the lower surface. FIG. 1 (b) shows a molding die 5 for molding a ring-shaped molded body. The molding die 5 is made only of a side peripheral portion made of rubber, and includes a rubber tubular mold 6 and a lid mold. 7 and core mold 8.
FIG. 1 (c) shows a molding die 9 for molding a container-shaped molded body such as a square sheath. The molding die 9 has only a bottom portion and a core portion made of metal. Lid type 11
And the core die 12.
【０００４】このようなＣＩＰ成形型１，５又は９を用
いてＣＩＰ成形を行うには、ゴム底型４又はコア金型
８，１２にゴム筒型２，６，１０を装着して成形用空間
に粉体Ｓを充填し、ゴム蓋型３、蓋金型７又はゴム蓋型
１１を装着する。そして、型同士の継目部分にシールテ
ープ（図示せず）を貼り、更に、必要に応じてシールテ
ープによるシール部分から成形型内に水や油等の加圧媒
体が浸入するのを防止するため、或いは、成形型が水や
油等の加圧媒体に漏れることを防止するために、成形型
全体を薄手のビニール袋やゴム袋に入れてＣＩＰ装置に
装入し、加圧媒体を加圧して成形を行う。In order to perform CIP molding using such CIP molding dies 1, 5 or 9, rubber bottom molds 4 or core dies 8, 12 are fitted with rubber tubular molds 2, 6, 10 for molding. The space is filled with the powder S, and the rubber lid mold 3, the lid mold 7, or the rubber lid mold 11 is attached. Then, a seal tape (not shown) is attached to the joint between the molds, and further, if necessary, in order to prevent a pressurized medium such as water or oil from entering the mold through the seal tape sealing part. Alternatively, in order to prevent the molding die from leaking to a pressurized medium such as water or oil, the entire molding die is put in a thin vinyl bag or a rubber bag, charged into the CIP device, and the pressurized medium is pressurized. And perform molding.
【０００５】このようなＣＩＰ成形型において、その少
なくとも一部を構成するゴム等の軟質材料としては、通
常、反発弾性値が約２０％以上でヤング率が約２０ｋｇ
ｆ／ｃｍ2 以上のクロロプレンゴム、ニトリルゴム、ウ
レタン等が用いられている。また、この軟質材料の厚さ
は、薄い方が加圧媒体による加圧力の伝達効率等の面で
好ましいが、過度に厚さが薄いと保形性、耐久性等が劣
ることから、通常は厚さ３ｍｍ以上のものが使用されて
いる。In such a CIP mold, as a soft material such as rubber constituting at least a part thereof, the impact resilience value is about 20% or more and the Young's modulus is about 20 kg.
Chloroprene rubber, nitrile rubber, urethane or the like having a f / cm 2 or more is used. In addition, the thickness of this soft material is preferably thin in terms of the transmission efficiency of the pressing force by the pressurizing medium, but if the thickness is too thin, the shape retention, durability, etc. are generally inferior. A thickness of 3 mm or more is used.
【０００６】[0006]
【発明が解決しようとする課題】従来のＣＩＰ成形型で
は、成形体の形状によっては、加圧成形後の減圧工程に
おいて、成形体にクラック等の欠陥が発生することがあ
り、良好な成形体を歩留り良く成形することが難しいと
いう問題があった。In the conventional CIP mold, depending on the shape of the molded product, defects such as cracks may occur in the molded product in the depressurizing step after the pressure molding, so that a good molded product is obtained. However, there is a problem that it is difficult to mold the above with good yield.
【０００７】即ち、例えば、図１（ａ）に示す成形型１
では、図２（ａ）に示す加圧成形時の状態から、成形後
の減圧工程において、成形型１が元の形状に復元する際
に、図２（ｂ）に示す如く、成形体Ｍが矢印の方向に引
張られる。そして、この引張応力により軸方向と垂直な
方向にクラックＣが発生する。That is, for example, the molding die 1 shown in FIG.
Then, when the molding die 1 returns to the original shape in the depressurizing step after molding from the state at the time of pressure molding shown in FIG. 2 (a), the molded body M is It is pulled in the direction of the arrow. Then, due to this tensile stress, a crack C is generated in a direction perpendicular to the axial direction.
【０００８】また、図１（ｂ）に示す成形型５では、図
３（ａ）に示す加圧成形時の状態から、成形後の減圧工
程において、成形型５のゴム筒型６が元の状態に復元す
る際に、図３（ｂ）に示す如く、成形体Ｍが矢印の方向
に引張られる。そして、この引張応力によりクラックＣ
が発生する。Further, in the molding die 5 shown in FIG. 1B, from the state at the time of pressure molding shown in FIG. When restoring the state, the molded body M is pulled in the direction of the arrow as shown in FIG. Then, due to this tensile stress, crack C
Occurs.
【０００９】同様に、図１（ｃ）に示す成形型９の場合
でも、加圧成形後の減圧工程におけるゴム筒型１０とゴ
ム蓋型１１の復元時の引張応力で、成形体のコーナー部
（図１（ｃ）のＡ，Ｂに相当する部分）にクラックが発
生し易い。Similarly, in the case of the molding die 9 shown in FIG. 1 (c), the corner portion of the molding is caused by the tensile stress when the rubber tubular mold 10 and the rubber lid mold 11 are restored in the depressurizing step after the pressure molding. Cracks are likely to occur in (portions corresponding to A and B in FIG. 1C).
【００１０】本発明は上記従来の問題点を解決し、加圧
成形後の減圧工程における成形体のクラック等の欠陥を
防止して、良好な成形体を歩留り良く成形することがで
きるＣＩＰ成形型を提供することを目的とする。The present invention solves the above-mentioned problems of the prior art, prevents defects such as cracks in the molded product in the depressurizing step after pressure molding, and molds a good molded product with good yield. The purpose is to provide.
【００１１】[0011]
【課題を解決するための手段】本発明のＣＩＰ成形型
は、一部又は全部が軟質材料で構成されたＣＩＰ成形型
において、該軟質材料の反発弾性値が１０％以下である
ことを特徴とする。The CIP molding die of the present invention is characterized in that a part or all of the CIP molding die is composed of a soft material, and the impact resilience value of the soft material is 10% or less. To do.
【００１２】ＣＩＰ成形型を反発弾性値が１０％以下の
軟質材料で構成することにより、加圧成形後の減圧工程
における成形体のクラック等の欠陥の発生を防止するこ
とができる。By forming the CIP mold from a soft material having a rebound resilience value of 10% or less, it is possible to prevent the occurrence of defects such as cracks in the molded body in the depressurizing step after pressure molding.
【００１３】即ち、従来ＣＩＰ成形型の軟質材料として
用いられているものの反発弾性値及びヤング率は具体的
には下記表１に示す通りである。That is, the impact resilience value and Young's modulus of those conventionally used as the soft material of the CIP mold are as shown in Table 1 below.
【００１４】[0014]
【表１】 [Table 1]
【００１５】このように反発弾性値が大きい軟質材料で
は、加圧成形後の減圧工程において、元の形状に復元す
る際の伸びや振動が大きく、成形体に与える応力が大き
いために成形体にクラック等の欠陥が発生し易い。In such a soft material having a large impact resilience value, in the depressurizing step after pressure molding, the elongation and vibration when restoring to the original shape are large, and the stress applied to the molded body is large, so that the molded body has a large stress. Defects such as cracks are likely to occur.
【００１６】即ち、ＣＩＰ成形においては、軟質材料製
の型は成形後においても成形体と密着している。離型性
を高めるために、多くの場合、離型剤を塗布するが、こ
のような場合においても軟質材料製の型は、成形体に密
着し、加圧成形後の減圧工程において、本来、型が元の
形状に戻るべき圧力に減圧された後になっても成形体に
密着している。そして、圧力が相当に低くなった後に、
型が成形体から離れるが、この離型時において、雰囲気
圧力が小さいために、従来の反発弾性値やヤング率の大
きい軟質材料製の型では、型が大きく伸びて振動する。
この復元時の型の伸びや振動による応力は、型の軟質材
料の厚さが厚い程大きい。このため、従来において、成
形型の保形性や耐久性の確保のために型の軟質材料の厚
さを厚くすると、成形体に大きな応力が付与され、成形
体にクラック等の欠陥が生じることとなる。That is, in CIP molding, the mold made of a soft material is in close contact with the molded body even after molding. In order to enhance the releasability, in most cases, a mold release agent is applied, but even in such a case, the mold made of a soft material adheres to the molded body, and in the depressurization step after pressure molding, originally, Even after the mold is depressurized to a pressure that should return it to its original shape, it is in close contact with the molded body. And after the pressure has dropped significantly,
Although the mold separates from the molded body, at the time of mold release, since the atmospheric pressure is small, in the conventional mold made of a soft material having a large impact resilience value and Young's modulus, the mold greatly expands and vibrates.
The stress due to the expansion and vibration of the mold at the time of this restoration increases as the thickness of the soft material of the mold increases. Therefore, conventionally, when the thickness of the soft material of the mold is increased to secure the shape retention and durability of the mold, a large stress is applied to the molded body, and defects such as cracks occur in the molded body. Becomes
【００１７】本発明のＣＩＰ成形型では、軟質材料の反
発弾性値が小さいため、成形型の保形性や耐久性を確保
し得る、比較的厚さの厚い軟質材料であっても、離型時
に成形体に付与する応力が小さく、成形体にクラック等
の欠陥が生じるのを有効に防止することができる。In the CIP molding die of the present invention, since the rebound resilience value of the soft material is small, even if the soft material having a relatively large thickness can secure the shape retention and durability of the molding die, Occasionally, the stress applied to the molded body is small, and it is possible to effectively prevent defects such as cracks from occurring in the molded body.
【００１８】なお、一般に、反発弾性値の小さい軟質材
料は、ヤング率も小さいが、本発明においては、特に、
反発弾性値が１０％以下でヤング率が２０ｋｇｆ／ｃｍ
2 以下であることが好ましい。Generally, a soft material having a small impact resilience value has a small Young's modulus, but in the present invention, in particular,
Impact resilience is 10% or less and Young's modulus is 20 kgf / cm
It is preferably 2 or less.
【００１９】このような本発明のＣＩＰ成形型は、軟質
材料の厚さを３ｍｍ以上、特に３〜７ｍｍとした、保形
性、耐久性に優れたＣＩＰ成形型に有効である。The CIP molding die of the present invention as described above is effective for a CIP molding die having a thickness of the soft material of 3 mm or more, particularly 3 to 7 mm and excellent in shape retention and durability.
【００２０】[0020]
【発明の実施の形態】以下に本発明を詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
【００２１】本発明のＣＩＰ成形型は、一部又は全部が
軟質材料で構成された成形型において、該軟質材料の反
発弾性値を１０％以下としたこと以外は、図１（ａ）〜
（ｃ）に示すような、従来のＣＩＰ成形型と同様の構成
とすることができる。The CIP molding die of the present invention is a molding die partially or wholly made of a soft material, except that the impact resilience value of the soft material is set to 10% or less.
A configuration similar to that of a conventional CIP molding die as shown in (c) can be adopted.
【００２２】本発明において、ＣＩＰ成形型を構成する
軟質材料としては、特に、反発弾性値が１０％以下でヤ
ング率が２０ｋｇｆ／ｃｍ2 以下、とりわけ反発弾性値
が５％以下でヤング率が１５ｋｇｆ／ｃｍ2 以下のもの
が好ましい。In the present invention, as the soft material constituting the CIP mold, particularly, the impact resilience value is 10% or less and the Young's modulus is 20 kgf / cm 2 or less, and particularly the impact resilience value is 5% or less and the Young's modulus is 15 kgf. It is preferably / cm 2 or less.
【００２３】このような軟質材料としては、例えば、防
振、制振、あるいは緩衝用として利用されるゴム材料を
用いることができ、ブチルゴム、アクリルゴム、フッ素
ゴムなどが用いられる。また、樹脂材料も用いることが
でき、反発弾性値を抑えるために、油を含浸させた樹脂
なども用いられる。As such a soft material, for example, a rubber material used for vibration proofing, vibration damping, or cushioning can be used, and butyl rubber, acrylic rubber, fluororubber, etc. are used. A resin material can also be used, and an oil-impregnated resin or the like is also used in order to suppress the impact resilience value.
【００２４】このような本発明のＣＩＰ成形型は、軟質
材料の厚さを３ｍｍ以上、特に３〜７ｍｍとした、保形
性、耐久性に優れたＣＩＰ成形型に有効である。The CIP molding die of the present invention as described above is effective for a CIP molding die having a soft material having a thickness of 3 mm or more, particularly 3 to 7 mm and excellent in shape retention and durability.
【００２５】[0025]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【００２６】実施例１〜４，比較例１〜４ 図１に示す形状の成形型を用いて、サイアロン組成粉末
のスプレー造粒粉を成形原料として、直径４０ｍｍ、長
さ１００ｍｍの円柱形成形体のＣＩＰ成形（成形圧１５
００ｋｇｆ／ｃｍ2 ）を行った。Examples 1 to 4 and Comparative Examples 1 to 4 Using a molding die having a shape shown in FIG. 1, a spray-granulated powder of sialon composition powder was used as a molding raw material to form a cylindrical molded body having a diameter of 40 mm and a length of 100 mm. CIP molding (molding pressure 15
00 kgf / cm 2 ) was performed.
【００２７】成形型を構成する軟質材料の反発弾性値
は、ヤング率及び厚さは表２に示す通りである。Table 2 shows the impact resilience value, Young's modulus and thickness of the soft material constituting the molding die.
【００２８】得られた成形体２０個について、クラック
の発生の有無を調べ、クラック発生率が５０％以上であ
るものを×、クラック発生率が１０〜５０％のものを
△、クラック発生率が１０％以下のものを○で評価し、
結果を表２に示した。The 20 molded articles thus obtained were examined for the occurrence of cracks. Those having a crack occurrence rate of 50% or more were evaluated as ×, those having a crack occurrence rate of 10 to 50% were evaluated as Δ, and the crack occurrence rate was evaluated. Those with 10% or less are evaluated by ○,
The results are shown in Table 2.
【００２９】なお、表２において、ゴムＩ及びゴムIIと
は、下記のものである。In Table 2, rubber I and rubber II are as follows.
【００３０】 ゴムＩ：東北ゴム（株）製 ＦＧ−１（３５） ゴムII：東北ゴム（株）製 ＦＧ−１（６０）Rubber I: Tohoku Rubber Co., Ltd. FG-1 (35) Rubber II: Tohoku Rubber Co., Ltd. FG-1 (60)
【００３１】[0031]
【表２】 [Table 2]
【００３２】表２より、本発明のＣＩＰ成形型であれ
ば、保形性等の向上のために、ゴムの厚さを厚くして
も、良好な結果が得られることが明らかである。From Table 2, it is clear that the CIP mold of the present invention can provide good results even if the thickness of the rubber is increased in order to improve the shape retention and the like.
【００３３】[0033]
【発明の効果】以上詳述した通り、本発明のＣＩＰ成形
型によれば、加圧成形後の減圧工程における成形体のク
ラック等の欠陥を防止して、良好な成形体を歩留り良く
成形することができる。As described above in detail, according to the CIP molding die of the present invention, defects such as cracks in the molded body in the pressure reducing step after pressure molding can be prevented, and a favorable molded body can be molded with high yield. be able to.
【図１】一般的なＣＩＰ成形型を示す断面図である。FIG. 1 is a cross-sectional view showing a general CIP mold.
【図２】従来のＣＩＰ成形型の問題点を説明する断面図
である。FIG. 2 is a cross-sectional view illustrating a problem of a conventional CIP molding die.
【図３】従来のＣＩＰ成形型の問題点を説明する断面図
である。FIG. 3 is a cross-sectional view illustrating a problem of a conventional CIP molding die.
１，５，９ 成形型 ２，６，１０ ゴム筒型 ３，１１ ゴム蓋型 ４ ゴム底型 ７ 蓋金型 ８，１２ コア金型 Ｓ 粉体 Ｍ 成形体 Ｃ クラック 1,5,9 Mold 2,6,10 Rubber Tube 3,11 Rubber Lid 4 Rubber Bottom 7 Lid Mold 8,12 Core Mold S Powder M Mold C Crack
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高山 孝一 埼玉県大宮市北袋町１丁目297番地 三菱 マテリアル株式会社総合研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Takayama 1-297 Kitabukuro-cho, Omiya City, Saitama Prefecture Mitsubishi Materials Corporation
Claims (3)
ＩＰ成形型において、該軟質材料の反発弾性値が１０％
以下であることを特徴とするＣＩＰ成形型。1. A C partly or wholly composed of a soft material.
In the IP mold, the impact resilience value of the soft material is 10%
A CIP molding die characterized in that:
質材料のヤング率が２０ｋｇｆ／ｃｍ2 以下であること
を特徴とするＣＩＰ成形型。2. The CIP molding die according to claim 1, wherein the Young's modulus of the soft material is 20 kgf / cm 2 or less.
て、該軟質材料の肉厚が３ｍｍ以上であることを特徴と
するＣＩＰ成形型。3. The CIP molding die according to claim 1, wherein the soft material has a wall thickness of 3 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21336095A JPH0957495A (en) | 1995-08-22 | 1995-08-22 | Cip forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21336095A JPH0957495A (en) | 1995-08-22 | 1995-08-22 | Cip forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0957495A true JPH0957495A (en) | 1997-03-04 |
Family
ID=16637892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21336095A Withdrawn JPH0957495A (en) | 1995-08-22 | 1995-08-22 | Cip forming die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0957495A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8419400B2 (en) | 2005-02-01 | 2013-04-16 | Tosoh Corporation | Sintered body, sputtering target and molding die, and process for producing sintered body employing the same |
| CN103658644A (en) * | 2013-11-30 | 2014-03-26 | 成都易态科技有限公司 | Isostatic pressing mold for manufacturing flake sintered body and assembly method of isostatic pressing mold |
| KR20160108063A (en) | 2015-03-06 | 2016-09-19 | (주)씨이케이 | Method for manufacturing alumina plate using CIP complex mold |
-
1995
- 1995-08-22 JP JP21336095A patent/JPH0957495A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8419400B2 (en) | 2005-02-01 | 2013-04-16 | Tosoh Corporation | Sintered body, sputtering target and molding die, and process for producing sintered body employing the same |
| JP2014129231A (en) * | 2005-02-01 | 2014-07-10 | Tosoh Corp | Sintered compact and sputtering target |
| US9920420B2 (en) | 2005-02-01 | 2018-03-20 | Tosoh Corporation | Sintered body, sputtering target and molding die, and process for producing sintered body employing the same |
| CN103658644A (en) * | 2013-11-30 | 2014-03-26 | 成都易态科技有限公司 | Isostatic pressing mold for manufacturing flake sintered body and assembly method of isostatic pressing mold |
| CN103658644B (en) * | 2013-11-30 | 2016-08-17 | 成都易态科技有限公司 | Manufacture isostatic pressing mold and the assembly method thereof of lamellar sintered body |
| KR20160108063A (en) | 2015-03-06 | 2016-09-19 | (주)씨이케이 | Method for manufacturing alumina plate using CIP complex mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20021105 |