JPH0123285B2 - - Google Patents
Info
- Publication number
- JPH0123285B2 JPH0123285B2 JP59169770A JP16977084A JPH0123285B2 JP H0123285 B2 JPH0123285 B2 JP H0123285B2 JP 59169770 A JP59169770 A JP 59169770A JP 16977084 A JP16977084 A JP 16977084A JP H0123285 B2 JPH0123285 B2 JP H0123285B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- mold
- ceramic powder
- plastic material
- 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.)
- Expired
Links
- 238000000465 moulding Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 23
- 239000004033 plastic Substances 0.000 claims description 20
- 229920003023 plastic Polymers 0.000 claims description 20
- 239000000919 ceramic Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 9
- 239000004014 plasticizer Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 5
- 230000009477 glass transition Effects 0.000 claims description 3
- 238000000462 isostatic pressing Methods 0.000 claims description 2
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920002160 Celluloid Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004421 molding of ceramic Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、セラミツクス粉末のような焼結粉末
の成形に適した静水圧プレス成形法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hydrostatic press molding method suitable for molding sintered powders such as ceramic powders.
粉末にあらゆる方向から均一な圧力が加えられ
る静水圧成形法は、均質な粉末成形体が得られる
点で他の加圧成形法に比べて優れた特性をもつこ
とが知られている。しかしながら、ゴム型を使用
するために、複雑な形状への成形が困難であるこ
と、金型が高価であること等の多くの問題をかか
えている。
It is known that the isostatic pressing method, in which uniform pressure is applied to powder from all directions, has superior properties compared to other pressure molding methods in that a homogeneous powder compact can be obtained. However, since a rubber mold is used, there are many problems such as difficulty in molding into complicated shapes and expensive molds.
上記の問題に対応する方法として、例えば特公
昭56−18641号公報に記載されているように、圧
力を除去しても圧粉末とともに収縮した状態を保
つ蝋、硬化油、ナイロン、ポリ塩化ビニリデン、
酢酸セルローズ、セルロイド、ポリ塩化ビニル、
フエノール樹脂、ポリエチレン、ポリスチレン等
の成形型製造材料に用いる可塑材を用いて粉末を
静水圧プレス成形する方法がある。 As a method to deal with the above problem, for example, as described in Japanese Patent Publication No. 56-18641, wax, hydrogenated oil, nylon, polyvinylidene chloride, etc., which maintain a contracted state together with the compacted powder even when pressure is removed, are used.
Cellulose acetate, celluloid, polyvinyl chloride,
There is a method of isostatic press molding of powder using a plasticizer used as a mold manufacturing material such as phenolic resin, polyethylene, or polystyrene.
しかしながら、これらの可塑材を用いる方法に
あつても、成形体の表面状態が悪いこと、また可
塑材自身で所望の形状を保てないこと等の問題が
残る。 However, even with methods using these plasticizers, there remain problems such as poor surface condition of the molded product and inability of the plasticizer itself to maintain a desired shape.
本発明の目的は、かかる静水圧成形の問題点を
解消し、複雑な形状を持つセラミツクス粉末の成
形を可能にする静水圧成形方法を提供することに
ある。
An object of the present invention is to provide a hydrostatic pressing method that solves the problems of hydrostatic pressing and enables molding of ceramic powder having a complicated shape.
本発明は、金枠内部に成形金型を配置して可塑
材を流し込んで成形空間を有する数ミリ厚の可塑
材層を形成し、同成形空間にセラミツクス粉末を
充填し、充填した成形粉末を可塑材層で完全に閉
塞したのち、ゴム材で覆い静水圧成形するもの
で、可塑型を加熱溶解あるいは薬品処理によつて
除去して、所望の成形体を得るものである。
The present invention involves arranging a molding die inside a metal frame, pouring a plastic material into it to form a plastic material layer several millimeters thick with a molding space, filling the molding space with ceramic powder, and then pouring the filled molding powder into the molding die. After it is completely closed with a plastic material layer, it is covered with a rubber material and subjected to isostatic pressure molding, and the plastic mold is removed by heating and melting or chemical treatment to obtain the desired molded product.
以下、本発明をＵ字形セラミツクス粉末を成形
する工程手順を例に図面に基づいて説明する。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings, taking as an example a process procedure for molding U-shaped ceramic powder.
第１図はＵ字形の金枠１に可塑材２と金枠４と
によつて、セラミツクス粉末成形用空間５が形成
された成形型６の平面図を示す。 FIG. 1 shows a plan view of a mold 6 in which a space 5 for molding ceramic powder is formed in a U-shaped metal frame 1 by a plastic material 2 and a metal frame 4. As shown in FIG.
第２図〜第５図は、第１図のＩ−Ｉ線から見た
断面によつて、本発明の成形方法の工程を示す図
である。 2 to 5 are cross-sectional views taken along the line II in FIG. 1, showing the steps of the molding method of the present invention.
まず、第２図に示すように、金枠１内に例えば
ワツクスからなる可塑材２を数ミリ厚さに流し込
む。次に第３図に示すように、流し込んだ可塑材
２が固化した後、その上に断面が角形をなすＵ形
の原型金型３と第２の金枠４をセツトする。そし
て、この上から前記第一の可塑材２と同質の可塑
材２’を流し込む。可塑材２’が固化した後原型
金型３を取り出すと金枠１中の可塑材２’にセラ
ミツクス粉末を充填するための空間が形成され
る。 First, as shown in FIG. 2, a plastic material 2 made of wax, for example, is poured into a metal frame 1 to a thickness of several millimeters. Next, as shown in FIG. 3, after the poured plastic material 2 has solidified, a U-shaped prototype mold 3 with a square cross section and a second metal frame 4 are set thereon. Then, a plastic material 2' having the same quality as the first plastic material 2 is poured over this. When the original mold 3 is taken out after the plastic material 2' has solidified, a space for filling the plastic material 2' in the metal frame 1 with ceramic powder is formed.
第４図は原型金型３を取り出した後の状態を示
すもので、５がセラミツクス粉末を充填するため
の空間であり、前記原型金型３と同一形状と同一
寸法をもつ成形すべき物品形状をなす可塑材で囲
まれた成形空間すなわち成形型を示す。その空間
をとり囲む可塑材と金型の距離は短いほど成形後
の素地の表面状態の向上につながるが、通常の場
合５mm程度が適当である。 FIG. 4 shows the state after the prototype mold 3 is taken out, where 5 is a space for filling ceramic powder, and the shape of the article to be molded has the same shape and dimensions as the prototype mold 3. It shows a molding space surrounded by plastic material that forms a mold. The shorter the distance between the plastic material surrounding the space and the mold, the better the surface condition of the substrate after molding, but in general, about 5 mm is appropriate.
このようにして準備した可塑材２，２’からな
る成形型６内に、第５図に示すように、セラミツ
クス粉末７を振動充填し、開口を同様の可塑材で
つくつた板８で蓋をし、さらに加熱溶融した可塑
材２”を流し込んで閉塞する。 As shown in FIG. 5, the mold 6 made of the plasticized materials 2 and 2' thus prepared is filled with a ceramic powder 7 by vibration, and the opening is covered with a plate 8 made of the same plasticized material. Then, a heated and melted plastic material 2'' is poured into the hole to seal it.
次いで、金枠１をとりはずし、第６図に示すよ
うに、成形型６全体をラバー９で包み、静水圧プ
レスすれば３次元的に静水圧力を受けた精度の高
い成形体を得ることができる。 Next, the metal frame 1 is removed, and as shown in FIG. 6, the entire mold 6 is wrapped with rubber 9 and isostatically pressed to obtain a highly accurate molded product that has been subjected to hydrostatic pressure in three dimensions. .
加圧する当たつては、可塑型が壊れることなし
に容易に塑性変形することが必要であるので、前
記可塑材層が持つガラス転移温度（Tg）以上の
温度で成形する。 When pressurizing, it is necessary for the plastic mold to be easily plastically deformed without breaking, so the molding is performed at a temperature higher than the glass transition temperature (Tg) of the plastic material layer.
このガラス転移温度（Tg）とは可塑材が適切
な軟性を有する温度を意味し、例えばPVCの場
合は約79℃である。 This glass transition temperature (Tg) means the temperature at which the plasticizer has appropriate flexibility, and for example, in the case of PVC, it is about 79°C.
最後に、第７図に示すように静水圧プレスから
取り出した可塑材からなる成形型を加熱溶解ある
いは溶剤によつて除去することによつてセラミツ
クス粉末の成形体１０を得る。 Finally, as shown in FIG. 7, the mold made of plastic material taken out from the isostatic press is removed by heating and melting or using a solvent to obtain a molded body 10 of ceramic powder.
彎曲部のアール径が50mmのＵ字形のセラミツク
ス粉末成形体を上記工程に基づいて成形した。
A U-shaped ceramic powder molded body having a radius of 50 mm at the curved portion was molded based on the above process.
可塑材としてパラフインワツクスを用い、パラ
フインワツクス型内に上記セラミツクス粉末を充
填した後、同型を第６図に示すカバー材としてラ
テツクスラバーを用いて30℃位の温度下で1400
Kg／cm2に加圧成形した。その結果表面状態がよ
く、寸法精度と形状がＵ字形成形金型に忠実なセ
ラミツクス粉末成形を得ることができた。 After filling a paraffin wax mold with the above ceramic powder using paraffin wax as a plasticizer, the same mold was heated at a temperature of about 30°C for 1400 min using latex rubber as a cover material as shown in Fig. 6.
Pressure molded to kg/cm 2 . As a result, we were able to obtain a ceramic powder molding with good surface condition and dimensional accuracy and shape faithful to the U-shaped mold.
本発明によつて、複雑な形状を有し、且つ均一
な密度を有するセラミツクス成形体を、格別の金
型を用いることなしに短時間に製造できると共
に、使用する金枠は繰り返し使用できるので、経
済的にも有利になるという利点がある。
According to the present invention, a ceramic molded body having a complex shape and uniform density can be manufactured in a short time without using a special mold, and the metal frame used can be used repeatedly. It also has the advantage of being economically advantageous.
添付図は、本発明の工程を説明するための図で
ある。第１図は成形型を示し、第２図〜第５図は
成形型加圧成形前までの工程を示し、第６図は、
成形に当たつてゴム材によつて成形型全体を覆つ
た状態を示す。第７図は本発明の方法によつて得
られた成形後のセラミツクス粉末成形体を示す図
である。
The attached drawings are diagrams for explaining the steps of the present invention. Figure 1 shows the mold, Figures 2 to 5 show the steps before pressure molding, and Figure 6 shows the
This shows the state in which the entire mold is covered with a rubber material during molding. FIG. 7 is a diagram showing a ceramic powder compact after molding obtained by the method of the present invention.
Claims (1)
込んで成形空間を有する数ミリ厚の可塑材層を形
成し、同成形空間にセラミツクス粉末を充填し、
充填した成形粉末を可塑材層で完全に閉塞した後
ゴム材で覆い静水圧成形することを特徴とするセ
ラミツクス粉末の成形方法。 ２ 静水圧成形を可塑材層がもつガラス転移温度
（Tg）以上で行なうことを特徴とする特許請求の
範囲第１項に記載のセラミツクス粉末の成形方
法。[Claims] 1. A mold is placed inside a metal frame, a plastic material is poured into it to form a plastic material layer several millimeters thick having a molding space, and the molding space is filled with ceramic powder,
A method for molding ceramic powder, which comprises completely closing the filled molding powder with a plastic layer, then covering it with a rubber material and subjecting it to isostatic pressure molding. 2. The method for molding ceramic powder according to claim 1, wherein the isostatic pressing is performed at a temperature higher than the glass transition temperature (Tg) of the plasticizer layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16977084A JPS6147212A (en) | 1984-08-13 | 1984-08-13 | Method of molding ceramic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16977084A JPS6147212A (en) | 1984-08-13 | 1984-08-13 | Method of molding ceramic powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6147212A JPS6147212A (en) | 1986-03-07 |
| JPH0123285B2 true JPH0123285B2 (en) | 1989-05-01 |
Family
ID=15892532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16977084A Granted JPS6147212A (en) | 1984-08-13 | 1984-08-13 | Method of molding ceramic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6147212A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104072053A (en) * | 2013-03-28 | 2014-10-01 | 陈霖 | Bakelite concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5618641A (en) * | 1979-07-25 | 1981-02-21 | Rigunaito Kk | Phenol resin composition |
-
1984
- 1984-08-13 JP JP16977084A patent/JPS6147212A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5618641A (en) * | 1979-07-25 | 1981-02-21 | Rigunaito Kk | Phenol resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6147212A (en) | 1986-03-07 |
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