JPH031121B2 - - Google Patents
Info
- Publication number
- JPH031121B2 JPH031121B2 JP56203915A JP20391581A JPH031121B2 JP H031121 B2 JPH031121 B2 JP H031121B2 JP 56203915 A JP56203915 A JP 56203915A JP 20391581 A JP20391581 A JP 20391581A JP H031121 B2 JPH031121 B2 JP H031121B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- present
- fired
- isostatic pressing
- pressing method
- 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 - Lifetime
Links
- 229920001971 elastomer Polymers 0.000 claims description 10
- 230000002706 hydrostatic effect Effects 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 12
- 238000000462 isostatic pressing Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 229920001084 poly(chloroprene) Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005467 ceramic manufacturing process Methods 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Description
【発明の詳細な説明】
本発明は大型形状セラミツクス製造工程におい
て、均質な成形体を得るために行う静水圧成形工
法に関するものであり、従来方法に比べて工程数
が低減でき、量産性に優れた静水圧成形工法を提
供しようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydrostatic pressing method used to obtain a homogeneous molded body in the manufacturing process of large-sized ceramics, which reduces the number of steps compared to conventional methods and is superior in mass productivity. The aim is to provide an isostatic pressing method.
従来、セラミツクス製造工程で、乾式成形を用
いて大型セラミツクスを製造する場合には、通常
の乾式成形では均一に加圧することは不可能であ
り、均質な成形体が得られず、こういつた不均質
な成形体を焼成すると、焼結体にクラツクを生じ
たりする。そして、前述の乾式成形における不均
一加圧を除去し、均質な成形体を得る方法として
静水圧成形工法が有効であることは公知である。 Conventionally, when producing large-sized ceramics using dry molding in the ceramic manufacturing process, it is impossible to apply pressure uniformly with normal dry molding, making it impossible to obtain a homogeneous molded product, and these problems occur. When a homogeneous molded body is fired, cracks may occur in the sintered body. It is well known that the hydrostatic pressing method is effective as a method for removing the uneven pressure in the dry forming described above and obtaining a homogeneous molded product.
通常の静水圧成形工法では、まず乾式成形によ
り一旦予備成形し、この成形体を氷のうのような
ゴム製の袋に入れ、真空ポンプで吸引後密封し、
ゴムを成形体に充分密着させた後、静水圧加圧装
置により静水圧成形を行つている。 In the normal isostatic pressing method, the molded product is first preformed by dry molding, then the molded product is placed in a rubber bag like an ice bag, which is then sealed after suction with a vacuum pump.
After the rubber is sufficiently adhered to the molded article, hydrostatic molding is performed using a hydrostatic pressurizing device.
こうした従来の静水圧成形工法では、各個体を
それぞれ個別にゴム製袋に充填する必要があり、
この着脱が困難で作業性が悪く、量産上好ましく
なかつた。また、成形体とゴム製袋を充分密着さ
せるために脱気する必要があり、脱気工程が必要
であつた。 In this conventional isostatic pressing method, each individual product must be individually filled into a rubber bag.
This attachment/detachment was difficult, resulting in poor workability and was not preferred for mass production. Further, in order to bring the molded body and the rubber bag into sufficient contact, it was necessary to perform deaeration, which required a deaeration step.
本発明はこのような従来の不都合を除去しよう
としてなされたものであり、以下に本発明による
静水圧成形工法について説明する。 The present invention has been made in an attempt to eliminate such conventional disadvantages, and the isostatic pressing method according to the present invention will be explained below.
本発明は従来工法が予備成形体をゴム製袋に入
れて真空脱気、静水圧成形後ゴム製袋を取外すの
に対し、ゴム製袋を着脱することなく、予備成形
体にも塗布もしくは浸漬によりゴムまたはプラス
チツクス等の高分子化合物膜を形成し、静水圧成
形を行つた後、高分子化合物膜を保持した状態の
成形体を焼成しようとするものである。これらの
予備成形体に形成された高分子化合物膜は、焼成
中飛散させることが可能であり、除去の必要がな
い。このように本発明によれば従来工法に比べて
工程数が大幅に低減でき、量産性が向上する。 In contrast to the conventional method in which the preform is placed in a rubber bag, vacuum deaerated, and the rubber bag is removed after isostatic pressure forming, the present invention does not require the rubber bag to be attached or removed, and the preform is also coated or dipped. In this method, a film of a polymer compound such as rubber or plastic is formed using isostatic pressure molding, and then the molded body retaining the film of the polymer compound is fired. The polymer compound film formed on these preforms can be scattered during firing and does not need to be removed. As described above, according to the present invention, the number of steps can be significantly reduced compared to conventional construction methods, and mass productivity can be improved.
次に、本発明工法を用いて60mmφ、40mmｔのセ
ラミツクス素子を静水圧成形した実施例を以下に
示す。 Next, an example in which a ceramic element of 60 mmφ and 40 mm thick was hydrostatically formed using the method of the present invention will be shown below.
60mmφ、40mmｔに乾式法により予備成形した試
料を、ネオプレンゴムをベンゼンで稀釈し、2000
センチポイズ以下に粘度調節したもので吹付け塗
布乾燥後、静水圧成形し、その後焼成した。焼成
中ネオプレンゴムを飛散させるために、800℃で
１時間保持した後、所定の焼成温度で焼成した。
ここでは静水圧成形の効果を実現させるために、
ネオプレンゴム被膜の厚さを0.3〜0.5mmにできる
ように上記の通り粘度を2000センチポイズ以下に
設定した。 A sample preformed to a size of 60mmφ and 40mmt by a dry method was diluted with neoprene rubber in benzene.
The viscosity was adjusted to centipoise or less, and the material was spray coated, dried, hydrostatically pressed, and then fired. In order to scatter the neoprene rubber during firing, it was held at 800°C for 1 hour and then fired at a predetermined firing temperature.
Here, in order to realize the effect of isostatic pressing,
As mentioned above, the viscosity was set to 2000 centipoise or less so that the thickness of the neoprene rubber coating could be 0.3 to 0.5 mm.
本発明工法をゴム製氷のうを用いた従来工法と
比べると、従来工法では予備成形後形体を氷のう
に投入してから焼成にいたるまでの着脱作業は１
ケ当り約７分必要であつたのに対し、一方本発明
工法では塗布、乾燥に２分を必要とするにすぎな
かつた。また、本発明工法で予備成形体に形成し
たネオプレンゴムにピンホール等は見られず、実
使用上問題は見られなかつた。 Comparing the method of the present invention with the conventional method using rubber ice packs, the conventional method requires only one installation and removal operation from putting the preformed shape into the ice pack to firing.
On the other hand, the method of the present invention required only 2 minutes for coating and drying, whereas about 7 minutes per coat was required. Further, no pinholes or the like were observed in the neoprene rubber preformed by the method of the present invention, and no problems were observed in actual use.
以上のように、本発明の工法は作業時間を大幅
に短縮することが可能で、量産性を有し、工業的
に有用性大なるものである。 As described above, the method of the present invention can significantly shorten the working time, has mass productivity, and is of great industrial utility.
Claims (1)
高分子化合物膜を形成し、静水圧成形を行うこと
を特徴とする静水圧成形工法。1. A hydrostatic pressing method characterized by forming a film of a polymer compound such as plastics or rubber on a preform and performing hydrostatic pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56203915A JPS58104708A (en) | 1981-12-17 | 1981-12-17 | Method of hydrostatic molding construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56203915A JPS58104708A (en) | 1981-12-17 | 1981-12-17 | Method of hydrostatic molding construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58104708A JPS58104708A (en) | 1983-06-22 |
| JPH031121B2 true JPH031121B2 (en) | 1991-01-09 |
Family
ID=16481797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56203915A Granted JPS58104708A (en) | 1981-12-17 | 1981-12-17 | Method of hydrostatic molding construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58104708A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547337A (en) * | 1982-04-28 | 1985-10-15 | Kelsey-Hayes Company | Pressure-transmitting medium and method for utilizing same to densify material |
| JPS59120406A (en) * | 1982-12-27 | 1984-07-12 | トヨタ自動車株式会社 | Manufacture of ceramic sintered body |
| JPS60195063A (en) * | 1984-03-16 | 1985-10-03 | 日本碍子株式会社 | Manufacture of ceramics |
| JPS6186211A (en) * | 1984-10-04 | 1986-05-01 | 日本碍子株式会社 | Ceramics composite structure and manufacture thereof |
| JPS63303705A (en) * | 1987-06-03 | 1988-12-12 | Harima Ceramic Co Ltd | Manufacture of large carbon containing brick |
-
1981
- 1981-12-17 JP JP56203915A patent/JPS58104708A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58104708A (en) | 1983-06-22 |
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