JPH04105797A - Rubber press forming method - Google Patents
Rubber press forming methodInfo
- Publication number
- JPH04105797A JPH04105797A JP22624190A JP22624190A JPH04105797A JP H04105797 A JPH04105797 A JP H04105797A JP 22624190 A JP22624190 A JP 22624190A JP 22624190 A JP22624190 A JP 22624190A JP H04105797 A JPH04105797 A JP H04105797A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- case
- rubber case
- molding
- powder
- 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.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 57
- 239000005060 rubber Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims description 26
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000011368 organic material Substances 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims description 42
- 229920006328 Styrofoam Polymers 0.000 claims description 11
- 239000008261 styrofoam Substances 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 7
- 239000004794 expanded polystyrene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000000462 isostatic pressing Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 6
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920000247 superabsorbent polymer Polymers 0.000 description 1
- 239000004583 superabsorbent polymers (SAPs) Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000011271 tar pitch Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/022—Moulds for compacting material in powder, granular of pasta form
- B30B15/024—Moulds for compacting material in powder, granular of pasta form using elastic mould parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Press Drives And Press Lines (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、静水圧加圧によるラバープレス成形法、詳し
くは単純形状の同一ラバーケースを用いて所望の最終形
状に近いニア−ネット成形をおこなうことができるラバ
ープレス成形法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a rubber press molding method using isostatic pressure, and more specifically, a method of near-net molding that is close to a desired final shape using the same rubber case with a simple shape. This article relates to a rubber press molding method that can be carried out.
等方性組織の圧粉成形体を得るための成形手段としてラ
バープレス法が広く有用されている。この成形法は、微
粉状の成形粉をラバーケースに充填したのち液媒体を介
して全方向から均等な静水圧をかけて成形するもので、
得られる成形体には高度の等方性と緻密な組織が付与さ
れる特徴がある。ところが、成形される形状は使用する
ラバーケースの形に支配されるため、サイズの変更ある
いは変わった形状の成形体を得ようとする場合には、そ
の都度ニア−ネット成形用のラバーケースを作製するか
、もしくは大型サイズの成形ブロック体から切削加工す
る等の方法が採られている。A rubber press method is widely used as a molding means for obtaining a powder compact with an isotropic structure. This molding method involves filling a rubber case with fine molding powder and then applying equal hydrostatic pressure from all directions through a liquid medium.
The resulting molded product is characterized by a high degree of isotropy and a dense structure. However, the shape of the molded product is controlled by the shape of the rubber case used, so if you want to change the size or obtain a molded product with a different shape, it is necessary to create a rubber case for near-net molding each time. Alternatively, methods such as cutting from a large-sized molded block body are adopted.
このうち、ニア−ネット成形により例えば坩堝あるいは
円筒状の成形体を得ようとする場合には、第４図（ア）
、（イ）に示すような中心部に中空の凹部位１を備える
ラバー容器２とラバー蓋３からなる厚肉のラバーケース
が用いられる。しかしながら、このような厚肉ラバーケ
ースを使用すると、成形後の降圧段階で発生するラバー
ケースのスプリングバック作用によって成形体が大きな
応力と界面摩擦力を受け、亀裂、破損などの成形不良を
招くケースが多発する。Among these, when trying to obtain a crucible or cylindrical molded body by near-net molding, for example, Fig. 4 (A)
A thick rubber case consisting of a rubber container 2 having a hollow concave portion 1 in the center and a rubber lid 3 as shown in (A) is used. However, when such a thick rubber case is used, the molded product is subjected to large stress and interfacial friction force due to the springback effect of the rubber case that occurs during the pressure reduction stage after molding, leading to molding defects such as cracks and breakage. occurs frequently.
本発明は、従来のニア−ネット成形のような最終形状に
沿った複雑形状のラバーケースを使用することなく、角
型、円筒型など単純形状の同一ラバーケースを用いて効
率的にニア−ネット成形をおこなうことができるラバー
プレス成形法の提供を目的とするものである。The present invention enables efficient near-net molding by using the same rubber case with a simple shape such as a square or cylindrical shape, without using a rubber case with a complicated shape that follows the final shape as in conventional near-net molding. The purpose of this invention is to provide a rubber press molding method that can perform molding.
なお、本発明によるラバープレス成形法は、特に等方性
緻密組織の炭素質材料を製造する過程の成形工程に有用
である。Note that the rubber press molding method according to the present invention is particularly useful in a molding process in the process of manufacturing a carbonaceous material with an isotropic dense structure.
上記の目的を達成するための本発明によるラバープレス
成形法は、ラバーケースに成形粉を充填して静水圧加圧
を施すラバープレス成形において、ラバーケース内に塑
性変形可能な有機質材料で構成された任意形状の成形物
を介在させることを構成上の特徴とする。A rubber press molding method according to the present invention for achieving the above object is a rubber press molding method in which a rubber case is filled with molding powder and subjected to isostatic pressure. The structural feature is that a molded article of an arbitrary shape is interposed therebetween.
本発明において、任意形状の成形物としてラバーケース
内に介在させる塑性変形可能な有機質材料としては、例
えば天然ゴム、合成ゴムなどのゴム類、発泡スチロール
のような発泡材を用いることができる。このうち、発泡
スチロールは容易に圧縮変形しながらスプリングバック
性がなく、そのうえ吹付は成形が可能である点で本発明
の目的に最も好適である。In the present invention, as the plastically deformable organic material interposed in the rubber case as a molded article of arbitrary shape, for example, rubbers such as natural rubber and synthetic rubber, and foamed materials such as expanded polystyrene can be used. Among these, styrene foam is most suitable for the purpose of the present invention because it is easily compressible and deformed but has no springback properties, and can be molded by spraying.
これら塑性変形性の有機質成形物は、成形体が最終形状
に近似する形状および位置においてラバーケース内に配
置される。These plastically deformable organic molded products are placed in a rubber case in a shape and position that approximates the final shape of the molded product.
第１図は、ラバーケース４の内壁に塑性変形可能な有機
質成形物５を一定厚さの内張り層として介在させた成形
１１様を例示した平断面図で、この場合には成形粉６は
ラバーケース４に比べて小さいスペースに充填された状
態で静水圧加圧を受ける。したがって、ラバーケース４
より小形サイズの成形体を得る場合に有効である。FIG. 1 is a plan cross-sectional view illustrating a molding 11 in which a plastically deformable organic molded material 5 is interposed as a lining layer of a constant thickness on the inner wall of a rubber case 4. In this case, the molding powder 6 is made of rubber. It receives hydrostatic pressurization while being filled in a smaller space than case 4. Therefore, rubber case 4
This is effective when obtaining a molded article of smaller size.
第２図は、坩堝、円筒などの成形体を得る場合に有効な
成形態様を示す側断面図で、発泡スチロール７で形成し
た円筒状の容器に加圧に際して硬化しない粉体もしくは
流体８を詰めて成形物を形成し、これを中子として円筒
型ラバーケース４の底部中心にセットしたのち、成形粉
６が充填される。この状態で成形処理をおこない、成形
後、第３図のようにラバーケースから離型した成形体９
の発泡スチロール７底部を破って容器内の粉体もしくは
流体８を排出する。FIG. 2 is a side sectional view showing a molding method that is effective for obtaining molded bodies such as crucibles and cylinders, in which a cylindrical container made of styrofoam 7 is filled with powder or fluid 8 that does not harden when pressurized. After forming a molded product and setting it as a core at the center of the bottom of a cylindrical rubber case 4, molding powder 6 is filled. The molding process is carried out in this state, and after molding, the molded product 9 is released from the rubber case as shown in Fig. 3.
The bottom of the Styrofoam 7 is broken and the powder or fluid 8 inside the container is discharged.
この成形態様で発泡スチロール７の容器に詰められる加
圧時に硬化しない性質の粉体としては、均質粒度をもつ
コークス粒、海砂などを挙げることができる。また流体
には水、ゲル（吸水させた高吸水性高分子）が用いられ
、水の場合にはゴム袋に入れ、ゲルの場合にはゴム袋、
発泡スチロール、ビニール袋などの容器内に詰められる
。Examples of the powder that does not harden when pressurized and which is packed into the Styrofoam container 7 in this molded form include coke grains having a uniform particle size, sea sand, and the like. In addition, water and gel (superabsorbent polymers that have absorbed water) are used as the fluid; water is placed in a rubber bag;
It is packed into a container such as Styrofoam or a plastic bag.
上記のラバープレス成形法を等方性炭素質材料の成形工
程に適用する場合には、介在させたを機質成形物はその
後の焼成段階で揮散除去されるから成形体から剥離する
必要はなくなる。When applying the above-mentioned rubber press molding method to the molding process of isotropic carbonaceous materials, there is no need to peel off the interposed organic molded product from the molded product because it is volatilized and removed in the subsequent firing step. .
本発明のラバープレス成形法では、ラバーケース内に塑
性変形可能な有機質材料で構成した任意形状の成形物を
最終形体に沿うように内張り層または中子として介在さ
せ、この状態で静水圧加圧が施されるから有機質成形物
は加圧力に追従して変形する。この過程での有機質成形
物の変形は極めて円滑に進行し、とくに成形物を発泡ス
チロールもしくは発泡スチロールの容器に加圧時に硬化
することのない粉体、流体などを詰めて形成した場合に
は降圧時にスプリングバック現象を伴うことがないから
成形体に亀裂、破損等の原因となる無用なストレスを与
えることがない。また、有機質成形物が介在する部分は
保護層としての機能を果たすため、離型段階での角欠け
が防止できる。In the rubber press molding method of the present invention, a molded product of an arbitrary shape made of a plastically deformable organic material is interposed in a rubber case as a lining layer or core along the final shape, and in this state is subjected to isostatic pressure. is applied, so the organic molded product deforms in accordance with the applied pressure. The deformation of the organic molded product during this process progresses extremely smoothly, especially when the molded product is formed by filling Styrofoam or a Styrofoam container with powder or fluid that does not harden when pressurized. Since there is no back phenomenon, unnecessary stress that may cause cracks, breakage, etc., is not applied to the molded product. Furthermore, since the portion where the organic molded material is present functions as a protective layer, corner chipping can be prevented during the mold release stage.
このような作用によって、常に成形効率よく所望の最終
形状に近いニア−ネット成形をおこなうことが可能とな
る。Due to such an effect, it is possible to always perform near-net molding that is close to the desired final shape with high molding efficiency.
〔実施例］ 以下、本発明を実施例に基づいて説明する。〔Example] Hereinafter, the present invention will be explained based on examples.
実施例１
角筒型のラバーケース（厚さ１５０１１１１、幅４００
ｍｍ、高さ５００ＩＩｍ＞の全内壁に発泡スチロールで
形成した厚さ１５ｍｍの成形物層を内張すした（第１図
と同−態様）。Example 1 Square tube-shaped rubber case (thickness 1501111, width 400
mm, height 500 II m>, the entire inner wall was lined with a 15 mm thick molded layer made of expanded polystyrene (same embodiment as in FIG. 1).
このラバーケースに、石油コークス微粉末７０重量％と
タールピッチ３０重量％との捏合物を平均粒子径５０μ
ｍに微粉砕した炭素質成形粉を充填し、常法に従い静水
圧プレス（ＣＩＰ）装置により１０００ｋｇ／Ｃｍ”の
圧力で成形処理した。A mixture of 70% by weight of petroleum coke fine powder and 30% by weight of tar pitch was placed in this rubber case with an average particle size of 50 μm.
Finely pulverized carbonaceous molding powder was filled into the mold, followed by molding at a pressure of 1000 kg/cm'' using a hydrostatic press (CIP) device according to a conventional method.
得られた等方性炭素質成形体のサイズは、厚さ１１０ｍ
ｍ 、幅３３０ｗｕ＋ 、高さ４２０ＩＩ１１と内張り
層を形成しないラバーケースを用いた場合（厚さ１３５
ｍｍ、幅３６０Ｉｌ■、高さ４５ｈ＋ｓ）に比べて小形
化し、成形組織には亀裂、破損、角欠は等の不良部分は
認められなかった。The size of the obtained isotropic carbonaceous molded body was 110 m thick.
m, width 330wu+, height 420II11 when using a rubber case that does not form a lining layer (thickness 135
mm, width 360Il, height 45h+s), and no defective parts such as cracks, damage, or corner defects were observed in the molded structure.
実施例２
発泡スチロールで形成した外径３００１ＩＩ１１、内径
２７Ｑｍｍ高さｌ０００＋ｕ＋の円筒容器に粒径０．３
〜１．０ｍｓのコークス粒を充填して成形物を作製した
。Example 2 Particle size 0.3 was placed in a cylindrical container made of styrofoam with an outer diameter of 3001II11, an inner diameter of 27Qmm, and a height of 1000+u+.
A molded article was prepared by filling with coke grains of ~1.0 ms.
直径５００ＩＩ１１、高さ１０００ＩＩＩｌの円筒型ラ
バーケースの中心部に前記に成形物を中子としてセット
し、実施例１と同一の炭素質成形粉を空間部に充填した
。この状態で静水圧プレス装置に移し、１０００１００
Ｏ■２の圧力で成形処理をおこなった。The molded product described above was set as a core in the center of a cylindrical rubber case with a diameter of 500II11 and a height of 1000IIII, and the same carbonaceous molding powder as in Example 1 was filled in the space. In this state, transfer to a hydrostatic press device and press 1000100
The molding process was carried out at a pressure of O2.
離型後、発泡スチロール容器の底部を破り、コークス粒
を排出した。After demolding, the bottom of the Styrofoam container was broken and the coke particles were discharged.
得られた等方性炭素質成形体は、外径４２０Ｔｌ１１、
内径２６０閣■、高さ９００ｍｍの円筒型で、亀裂、破
損などは全く認められない緻密組織を備えるものであっ
た。The obtained isotropic carbonaceous molded body had an outer diameter of 420Tl11,
It had a cylindrical shape with an inner diameter of 260 mm and a height of 900 mm, and had a dense structure with no cracks or damage observed.
ついで、中心孔部に発泡スチロール内張り層が介在した
まま焼成処理を施したところ、内張り層を構成する有機
質成分は綺麗に揮散除去され、目的とする最終形状に近
い円筒炭素質材を得ることができた。Then, when a firing treatment was performed with the styrofoam lining layer interposed in the center hole, the organic components constituting the lining layer were completely volatilized and removed, making it possible to obtain a cylindrical carbonaceous material with a shape close to the desired final shape. Ta.
以上のとおり、本発明のラバープレス成形法に従えば、
単純形状の同一ラバーケースを用いて複雑な最終形状に
近似する成形体を円滑かつ効率的に得ることができる。As described above, according to the rubber press molding method of the present invention,
Using the same simple rubber case, it is possible to smoothly and efficiently obtain a molded article that approximates a complex final shape.
したがって、各種形状のラバーケースを準備したり、大
きな加工ロスを伴うことなしに所望の成珍体を形成する
ことが可能となるから、特に等方性炭素質の坩堝、円筒
などを製造する過程のニア−ネット成形工程として有用
である。Therefore, it is possible to prepare rubber cases of various shapes and form desired Seijin bodies without large processing losses, especially in the process of manufacturing isotropic carbonaceous crucibles, cylinders, etc. This is useful as a near-net molding process.
３・・・ラバー蓋 ４・−・ラバーケース５・
・・塑性変形性の有機質成形物
６・・・成形粉 ７・・・発泡スチロール８
・・・粉体もしくは流体 ９・・・成形体出願人 東
海カーボン株式会社
代理人 代理人 高 畑 正 也3...Rubber lid 4--Rubber case 5-
... Plastically deformable organic molded product 6 ... Molding powder 7 ... Styrofoam 8
... Powder or fluid 9 ... Molded object applicant Tokai Carbon Co., Ltd. Agent Agent Masaya Takahata
第１図は本発明の実施態様を例示したラバーケースの平
断面図、第２図は別の実施態様を例示したラバーケース
の側断面図、第３図は第２図のラバーケースで得られた
成形体の処理説明図である。
第４図は従来のラバーケースを示したもので、（ア）は
側断面図、（イ）は（ア）のＡ−Ａ’に沿う平断面図で
ある。
１・・・凹部位 ２・・・ラバー容器第
図
第
図
第
図
（イ）FIG. 1 is a plan sectional view of a rubber case illustrating an embodiment of the present invention, FIG. 2 is a side sectional view of a rubber case illustrating another embodiment, and FIG. FIG. FIG. 4 shows a conventional rubber case, in which (A) is a side sectional view and (B) is a plan sectional view taken along line AA' in (A). 1...Concave part 2...Rubber container Fig. Fig. Fig. (a)
Claims (1)
ラバープレス成形において、ラバーケース内に塑性変形
可能な有機質材料で構成された任意形状の成形物を介在
させることを特徴とするラバープレス成形法。 ２、塑性変形可能な有機質材料が、発泡スチロールであ
る請求項１記載のラバープレス成形法。 ３、発泡スチロールの容器に加圧に際して硬化しない粉
体もしくは流体を詰めて成形物を形成し、これを中子と
してラバーケース内にセットした状態で成形したのち、
前記粉体もしくは流体を排出する請求項１記載のラバー
プレス成形法。[Claims] 1. In rubber press molding in which a rubber case is filled with molding powder and subjected to isostatic pressure, a molded object of an arbitrary shape made of a plastically deformable organic material is interposed within the rubber case. Rubber press molding method is characterized by: 2. The rubber press molding method according to claim 1, wherein the plastically deformable organic material is expanded polystyrene. 3. Fill a styrofoam container with powder or fluid that does not harden when pressurized to form a molded product, set this as a core in a rubber case, and then mold it.
The rubber press molding method according to claim 1, wherein the powder or fluid is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22624190A JPH07108477B2 (en) | 1990-08-28 | 1990-08-28 | Rubber press molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22624190A JPH07108477B2 (en) | 1990-08-28 | 1990-08-28 | Rubber press molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04105797A true JPH04105797A (en) | 1992-04-07 |
| JPH07108477B2 JPH07108477B2 (en) | 1995-11-22 |
Family
ID=16842108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22624190A Expired - Fee Related JPH07108477B2 (en) | 1990-08-28 | 1990-08-28 | Rubber press molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07108477B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4827346B2 (en) * | 2001-09-13 | 2011-11-30 | イビデン株式会社 | Rubber press molding method |
| JP5361954B2 (en) * | 2011-08-01 | 2013-12-04 | イビデン株式会社 | Rubber press molding method |
-
1990
- 1990-08-28 JP JP22624190A patent/JPH07108477B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07108477B2 (en) | 1995-11-22 |
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