JPS63194913A - Plastic injection mold - Google Patents
Plastic injection moldInfo
- Publication number
- JPS63194913A JPS63194913A JP2634587A JP2634587A JPS63194913A JP S63194913 A JPS63194913 A JP S63194913A JP 2634587 A JP2634587 A JP 2634587A JP 2634587 A JP2634587 A JP 2634587A JP S63194913 A JPS63194913 A JP S63194913A
- Authority
- JP
- Japan
- Prior art keywords
- zirconia
- mold
- ceramic
- plastic
- plastic injection
- 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
- 239000004033 plastic Substances 0.000 title claims abstract description 21
- 229920003023 plastic Polymers 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 title claims description 8
- 239000007924 injection Substances 0.000 title claims description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000919 ceramic Substances 0.000 claims abstract description 25
- 229910002077 partially stabilized zirconia Inorganic materials 0.000 claims abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 3
- 229910052863 mullite Inorganic materials 0.000 abstract description 3
- 239000011029 spinel Substances 0.000 abstract description 3
- 229910052596 spinel Inorganic materials 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 238000000465 moulding Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000006084 composite stabilizer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (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、プラスチック射出成形用金型に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a plastic injection mold.
［従来の技術］
プラスチック射出成形用金型は、従来そのほとんどが工
具鋼等の金属材料のみでつくられている。[Prior Art] Conventionally, most plastic injection molds have been made only of metal materials such as tool steel.
［発明が解決しようとする問題点］
従来の金属製金型では、離型性、プレートアウト、ヨゴ
レ等の問題があり、これがプラスチック成形製品の品質
に重大な影響をもたらす。特に離型性については数多く
の離型剤が市販されているが、効果の持続性および成形
品への混入等の問題をひきおこす。[Problems to be Solved by the Invention] Conventional metal molds have problems such as mold releasability, plate-out, and staining, which have a serious impact on the quality of plastic molded products. In particular, with regard to mold release properties, many mold release agents are commercially available, but they cause problems such as persistence of effect and contamination with molded products.
また近年、プラスチックに無機質、有機質、金属等のフ
ィラーを混入して、プラスチックの特性を広げようとす
る動きが高まりつつある。このようなフィラーの入った
プラスチックの成形に従来の金属製金型を使用すると、
金型の摩耗、腐蝕が生じやすく、その寿命がごく短くな
る。Furthermore, in recent years, there has been a growing movement to expand the properties of plastics by mixing fillers such as inorganic, organic, and metal fillers into plastics. When conventional metal molds are used to mold plastics containing such fillers,
The mold is prone to wear and corrosion, which shortens its lifespan.
本発明は、このような従来のプラスチック射出成形用金
型における欠点を解消したもの、すなわち離型性のよい
、プレートアウトやヨゴレの少ない、かつ、耐摩耗性、
耐腐蝕性にすぐれたプラスチック射出成形用金型を提供
するものである。The present invention eliminates the drawbacks of conventional plastic injection molds, that is, it has good mold releasability, less plate-out and staining, and has wear resistance.
The present invention provides a plastic injection mold with excellent corrosion resistance.
［問題点を解決するための手段およびその作用コ本発明
者らは、ジルコニア焼結体は強度および硬度が高いだけ
でなく、溶融したプラスチックが付着しにくく、これに
よって上記の問題点が解決されることを見出し、本発明
に到達した。[Means for Solving the Problems and Their Effects] The present inventors have found that zirconia sintered bodies not only have high strength and hardness, but also have difficulty in adhering to molten plastic, which solves the above problems. We have discovered that this is the case, and have arrived at the present invention.
すなわち、本発明は、ジルコニアを４０νｔ％以上含む
セラミックスからなるプラスチック射出成形用金型を要
旨とする。That is, the gist of the present invention is a plastic injection mold made of ceramics containing 40 vt% or more of zirconia.
本発明が適用されるプラスチック用金型として、たとえ
ば次のものをあげることができるが、これらに限定され
るわけではない。Examples of plastic molds to which the present invention is applied include, but are not limited to, the following.
（１）２板構成金型
（２）３板構成金型
（３）ねじ型
本発明の金型は、全体がセラミックスで構成されたもの
であってもよく、また、プラスチックが接触する部分に
のみジルコニア４０ｖｔ％以上のセラミックスを使用し
、他の部分は金属材料としたものであってもよい。すな
わち他の部分は金属製ケースとし、上記セラミックス部
材を、焼バメ、接着またはカシメ等の方法で支持させれ
ばよい。このセラミックス部の厚みとしては０゜１〜５
ＩＩＩｌあればよい。このようにして、とくに大型の金
型の製作費を下げることができる。(1) Two-plate mold (2) Three-plate mold (3) Screw type The mold of the present invention may be made entirely of ceramics, and the parts that come in contact with plastic may be It is also possible to use ceramics containing 40 vt% or more of zirconia only, and use metal materials for the other parts. That is, the other parts may be made of a metal case, and the ceramic member may be supported by a method such as shrink fitting, adhesion, or caulking. The thickness of this ceramic part is 0°1~5
IIIl is enough. In this way, the production costs, especially for large molds, can be reduced.
ジルコニア系セラミックスと金属との線膨張係数が近似
しているので、上記セラミックス−金属複合体は使用温
度でその両者間の剥離がおこらない。Since the coefficients of linear expansion of the zirconia ceramic and the metal are similar, the ceramic-metal composite does not peel off between the two at the operating temperature.
本発明の金型のセラミックス部分は、ジルコニアを４０
ｗｔ％以上含まねばならない。これは、ジルコニア焼結
体のみからなるものであってもよく、また８０ｗｔ％ま
では他のセラミックスが混じっていてもよいことを意味
する。他のセラミックスとしては、例えば、アルミナ、
スピネル、ムライト等をあげることができるが、アルミ
ナとの混合セラミックスが硬度、耐摩耗性等の点ですぐ
れている。The ceramic part of the mold of the present invention is made of 40% zirconia.
Must contain at least wt%. This means that it may be made of only a zirconia sintered body, or that up to 80 wt% of other ceramics may be mixed. Other ceramics include, for example, alumina,
Examples include spinel and mullite, but ceramics mixed with alumina are superior in terms of hardness and wear resistance.
また、ジルコニア含有ｆｆ１４０ｗ１％以上であればジ
ルコニアがもつプラスチックとの非親和性が維持され、
離型性プレートアウト、ヨゴレによるトラブルを小さく
することができる。In addition, if the zirconia content is ff140w1% or more, the non-compatibility of zirconia with plastics is maintained,
Problems caused by mold releasability such as plate out and dirt can be minimized.
ジルコニアとしては、強度、靭性および耐熱性のよい部
分安定化ジルコニアがもっともよい。部分安定化ジルコ
ニアに固溶させる安定化剤の適当な量は、イツトリアで
は１〜５ｍ０１％、カルシアでは２〜９１１ｏ１％、マ
グネシアでは８〜１０１０１％、セリアでは８〜３０ｍ
ｏ１％等である。The best zirconia is partially stabilized zirconia, which has good strength, toughness, and heat resistance. The appropriate amount of stabilizer to be solid-dissolved in partially stabilized zirconia is 1 to 5 m01% for ittria, 2 to 911 o1% for calcia, 8 to 10101% for magnesia, and 8 to 30 m for ceria.
o1% etc.
これらを２種以上固溶化させてもよい。Two or more of these may be dissolved in solid solution.
その中でも、イツトリア部分安定化ジルコニアは、とく
に高強度かえられ、また２００℃付近における安定性に
もすぐれており、強度低下もなく、本発明の材料として
特に適している。Among them, ittria partially stabilized zirconia has particularly high strength and excellent stability at around 200° C., and there is no decrease in strength, making it particularly suitable as a material for the present invention.
本発明の金型の製造にあたっては、焼結性のすぐれた微
粉末を原料とする必要がある。ジルコニアは湿式法でえ
られた１次粒子径２００〜４００人の微粉末を、またア
ルミナ、スピネル、ムライト等は湿式法または共沈法で
えられた高純度粉末を用いるのが望ましい。In manufacturing the mold of the present invention, it is necessary to use a fine powder with excellent sinterability as a raw material. For zirconia, it is desirable to use a fine powder with a primary particle size of 200 to 400 particles obtained by a wet method, and for alumina, spinel, mullite, etc., to use a high purity powder obtained by a wet method or coprecipitation method.
この原料粉末をラバープレス法等によって所望の形に成
形し、焼成してセラミックスかえられる。This raw material powder is molded into a desired shape by a rubber press method, etc., and fired to convert it into ceramics.
この焼成法としては、常圧の焼成法でもよく、さらに熱
間静水圧加圧焼成法（ＨＩＰ処理）を加えてもよい。As this firing method, a normal pressure firing method may be used, and a hot isostatic pressing firing method (HIP treatment) may be added.
このようにして得られたセラミックスをダイヤモンド砥
石等で研削、研摩し、所定の寸法および表面あらさに仕
上げて、本発明に使用するセラミックス部材がえられる
。The ceramic member thus obtained is ground and polished using a diamond grindstone or the like to achieve predetermined dimensions and surface roughness, thereby obtaining the ceramic member used in the present invention.
［発明の効果コ
本発明の金型をプラスチックの成形に使用することによ
り、以下の効果をあげることができる。[Effects of the Invention] By using the mold of the present invention for molding plastics, the following effects can be achieved.
（１）離型性がよいので、高粘着性樹脂でも離型剤を必
要としない。(1) Since mold release properties are good, no mold release agent is required even with highly adhesive resins.
（２）表面のきれいな製品を得ることができる。(2) A product with a clean surface can be obtained.
（３）金型の清掃頻度を減らして、長期連続運転を行う
ことができる。(3) Long-term continuous operation can be performed by reducing the frequency of mold cleaning.
（４）かりにブスチックが金型に付着しても、金型の硬
度が高いので、どのような工具を清掃に用いても金型を
損傷することが少ない。(4) Even if plastic stick adheres to the mold, the mold is highly hard, so no matter what tool is used for cleaning, the mold is unlikely to be damaged.
（５）フィラーを多く添加したプラスチ・ツクを成形し
ても金型が摩耗しにくいので、金型の取替頻度が少ない
。(5) Even when molding plastic with a large amount of filler added, the mold is less likely to wear out, so the mold needs to be replaced less frequently.
（６）腐蝕性樹脂を成形しても腐蝕しにくい。(6) Resistant to corrosion even when molded with corrosive resin.
（７）異常流動が発生しにくいので、従来の金型では成
形が困難であった低流動性樹脂の成形が容易である。(7) Since abnormal flow is less likely to occur, low fluidity resins, which are difficult to mold using conventional molds, can be easily molded.
［実施例］
以下、本発明を具体例によって説明するが、本発明はこ
れらに限定されるものではない。[Examples] Hereinafter, the present invention will be explained using specific examples, but the present invention is not limited to these.
実施例１〜３、比較例１．２
（金型の製造）
表１の原料粉末を湿式合成法によりえた。該原料粉末を
ラバープレス法によって成形し、表中の温度で焼成して
、セラミックスをえた。また、一部のものはさらにＨＩ
Ｐ処理した。Examples 1 to 3, Comparative Example 1.2 (Manufacture of mold) The raw material powders shown in Table 1 were obtained by a wet synthesis method. The raw material powder was molded by a rubber press method and fired at the temperature shown in the table to obtain ceramics. In addition, some items are even more HI
P-treated.
このセラミックスを研削、研摩、穴加工し、所定の寸法
に仕上げ、鋼に焼バメして、樹脂との接触部をセラミッ
クスとした金型をつくった。This ceramic was ground, polished, and drilled to the desired dimensions, and then shrink-fitted to steel to create a mold with ceramic as the contact part with the resin.
また、比較のため鋼にクロムメッキした金型（従来品）
もテストした。Also, for comparison, a mold made of chrome plated steel (conventional product)
was also tested.
（射出成形テスト）
上記のよ゛うにしてつくった金型を用いて平板の成形を
行った。(Injection molding test) A flat plate was molded using the mold made as described above.
各成形終了後は、金型を交換した後、次の例の成形に移
った。After each molding was completed, the mold was replaced, and then the molding of the next example was started.
成形および測定条件は、以下のとおりである。The molding and measurement conditions are as follows.
（１）樹脂 東洋曹達工業■製塩化ビニル樹脂リューロ
ン８００８Ｋ Ｐｍ２Ｏ３
（２）射出成形機
ａ 本体 東芝機械■製Ｉｓ ５０ Ａ （３０ｚ）ｂ
金型 平板 １４０ Ｘ ８０Ｘ ２ｔ （ａｍ）（
３）成形条件
ａ シリンダ一温度
Ｃ−Ｉ Ｃ−２Ｃ−３ＮＨ
１５０℃ １６０℃ １７０℃ １８０℃ｂ 金型温度
５０℃
Ｃスクリニー回転数 ３８ｒｐａ＋
（４）ノズルの形状
オーブンノズル、ノズル出口直径３關
（５）コンパウンド
鉛系複合安定剤ＴＲ−８００（水沢化学社製）を樹脂１
００重量部に対し４．２重量部と可塑剤ＤＯＰ １０重
量部、フィラー（炭酸カルシウム） １０重量部を添加
し、ヘンシェルミキサーで混合した混合物を上記射出成
形に供した。(1) Resin Vinyl chloride resin Ryuron 8008K Pm2O3 manufactured by Toyo Soda Kogyo ■ (2) Injection molding machine a Main body Is 50 A (30z) b manufactured by Toshiba Machine ■
Mold flat plate 140 x 80 x 2t (am) (
3) Molding conditions a Cylinder temperature C-I C-2C-3NH 150℃ 160℃ 170℃ 180℃b Mold temperature 50℃ C screenie rotation speed 38rpa+ (4) Nozzle shape Oven nozzle, nozzle exit diameter 3 5) Add compound lead-based composite stabilizer TR-800 (manufactured by Mizusawa Chemical Co., Ltd.) to resin 1.
To 00 parts by weight, 4.2 parts by weight, 10 parts by weight of a plasticizer DOP, and 10 parts by weight of a filler (calcium carbonate) were added, and the mixture mixed in a Henschel mixer was subjected to the above injection molding.
（６）測定
連続成形運転２００シヨツト成形し、金型からの成形品
のはずれやすさの比較を行った。また金型へのプレート
アウト、ヨゴレの量を目視で観察した。結果を表１に示
す。(6) Measurement Continuous molding operation 200 shots were molded, and the ease with which the molded product came off from the mold was compared. In addition, the amount of plate out and dirt on the mold was visually observed. The results are shown in Table 1.
実施例１〜３では２００シヨツトすべての場合に金型へ
の付着は見られなかった。しかし、比較例１および２で
は２００シヨツトすべての場合に成形品が金型に付着し
、工具で取はずした。また比較例１および２ではプレー
トアウト、ヨゴレが金型に多く発生し、その結果、ショ
ット回数が増すにつれて成形品表面のつやがなくなり、
表面状態が悪くなった。In Examples 1 to 3, no adhesion to the mold was observed in all 200 shots. However, in Comparative Examples 1 and 2, the molded product adhered to the mold in all 200 shots and was removed using a tool. In addition, in Comparative Examples 1 and 2, plate-out and dirt often occurred on the mold, and as a result, as the number of shots increased, the surface of the molded product lost its luster.
The surface condition has deteriorated.
Claims (2)
らなるプラスチック射出成形用金型。(1) A plastic injection mold made of ceramics containing 40 wt% or more of zirconia.
求の範囲第１項記載のプラスチック射出成形用金型。(2) The plastic injection mold according to claim 1, wherein the zirconia is partially stabilized zirconia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62026345A JP2512929B2 (en) | 1987-02-09 | 1987-02-09 | Plastic injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62026345A JP2512929B2 (en) | 1987-02-09 | 1987-02-09 | Plastic injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63194913A true JPS63194913A (en) | 1988-08-12 |
| JP2512929B2 JP2512929B2 (en) | 1996-07-03 |
Family
ID=12190857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62026345A Expired - Lifetime JP2512929B2 (en) | 1987-02-09 | 1987-02-09 | Plastic injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2512929B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08207053A (en) * | 1995-02-02 | 1996-08-13 | Fujio Sakamoto | Mold and molding method |
| GB2460162A (en) * | 2008-05-20 | 2009-11-25 | Advanced Composites Group Ltd | Ceramic tools |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55121970A (en) * | 1979-01-04 | 1980-09-19 | Commw Scient Ind Res Org | Partially stabilized zirconia ceramic |
| JPS58157615U (en) * | 1982-04-16 | 1983-10-21 | パイロツトプレシジヨン株式会社 | Ejector pin for molding mold |
| JPS58191133A (en) * | 1982-04-30 | 1983-11-08 | Seikosha Co Ltd | Mold |
| JPS61100425A (en) * | 1984-10-23 | 1986-05-19 | Sekisui Chem Co Ltd | Mold for molding plastic |
-
1987
- 1987-02-09 JP JP62026345A patent/JP2512929B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55121970A (en) * | 1979-01-04 | 1980-09-19 | Commw Scient Ind Res Org | Partially stabilized zirconia ceramic |
| JPS58157615U (en) * | 1982-04-16 | 1983-10-21 | パイロツトプレシジヨン株式会社 | Ejector pin for molding mold |
| JPS58191133A (en) * | 1982-04-30 | 1983-11-08 | Seikosha Co Ltd | Mold |
| JPS61100425A (en) * | 1984-10-23 | 1986-05-19 | Sekisui Chem Co Ltd | Mold for molding plastic |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08207053A (en) * | 1995-02-02 | 1996-08-13 | Fujio Sakamoto | Mold and molding method |
| GB2460162A (en) * | 2008-05-20 | 2009-11-25 | Advanced Composites Group Ltd | Ceramic tools |
| GB2460162B (en) * | 2008-05-20 | 2013-04-17 | Umeco Structural Materials Derby Ltd | Ceramic tools |
| US9802370B2 (en) | 2008-05-20 | 2017-10-31 | Cytec Industrial Materials (Derby) Limited | Ceramic tools |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2512929B2 (en) | 1996-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |