JPH0532416A - Method for regenerating zirconia powder - Google Patents
Method for regenerating zirconia powderInfo
- Publication number
- JPH0532416A JPH0532416A JP3191856A JP19185691A JPH0532416A JP H0532416 A JPH0532416 A JP H0532416A JP 3191856 A JP3191856 A JP 3191856A JP 19185691 A JP19185691 A JP 19185691A JP H0532416 A JPH0532416 A JP H0532416A
- Authority
- JP
- Japan
- Prior art keywords
- zirconia powder
- runners
- spool
- waste materials
- zirconia
- 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.)
- Pending
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ジルコニア粉末と樹脂
等の有機物の混練物であるコンパウンドを用いて行う射
出成形時に生成するスプール・ランナー等の廃材の再生
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the recycling of waste materials such as spools and runners produced during injection molding using a compound which is a kneaded product of zirconia powder and an organic material such as resin.
【０００２】[0002]
【従来の技術】ジルコニアセラミックスの射出成形時に
生成するスプール・ランナー等の廃材は、粉砕してその
まま使用されるか、再びペレット状に造粒され使用され
ていた。2. Description of the Related Art Waste materials such as spools and runners produced during injection molding of zirconia ceramics have been crushed and used as they are, or they have been re-granulated into pellets and used.
【０００３】[0003]
【発明が解決しようとする課題】ジルコニア粉末と樹脂
等の有機物の混練物であるコンパウンドは、その製造過
程で混練機や造粒機の金属部分と接触するため、摩耗に
よる金属の異物が混入する。さらに、射出成形時に生成
するスプール・ランナー等の廃材には成形機との接触に
よる異物も混入する。そのため、スプール・ランナー等
の廃材を粉砕するかまたは、再びペレット状に造粒し射
出成形すると、異物の量は倍増し、製品における外観
上、の不良や強度低下の原因となる。A compound, which is a kneaded product of zirconia powder and an organic substance such as resin, comes into contact with the metal part of a kneader or a granulator during its manufacturing process, and thus foreign matter of metal is mixed due to abrasion. .. Further, foreign materials due to contact with the molding machine are mixed in the waste materials such as spools and runners generated during the injection molding. Therefore, when waste materials such as spools and runners are crushed or granulated again into pellets and injection-molded, the amount of foreign matter doubles, which causes defects in the appearance of the product and a decrease in strength.
【０００４】[0004]
【課題を解決するための手段】スプール・ランナー等の
廃材を加熱し、大半の有機物を蒸発させた後、酸により
金属である異物を溶解し除去する。数回水洗し、さらに
加熱し、残留している有機物と酸を取り除くことによ
り、異物を含まないジルコニア粉末を再生するものであ
る。[Means for Solving the Problems] Waste materials such as spools and runners are heated to evaporate most of the organic substances, and then a foreign substance which is a metal is dissolved and removed by an acid. The zirconia powder containing no foreign matter is regenerated by washing with water several times and further heating to remove residual organic substances and acid.
【０００５】[0005]
【作用】ジルコニアセラミックスの射出成形時に生成す
るスプール・ランナー等の廃材は、ジルコニア粉末と樹
脂等の有機物の混練物であるコンパウンドに金属の異物
が混入した構成になっている。金属の異物は、廃材の内
部にあるため効率よく酸で溶解除去するためには、有機
物を除去する必要がある。有機物の除去には溶媒抽出や
セラミックスの射出成形による製品製造の工程にある脱
脂炉を利用した加熱による除去が考えられる。加熱によ
る除去おいては、金属の異物を酸化させないことが酸に
よる溶解除去を効率よく行う重要点となる。この金属は
分析の結果ほとんどが鉄であることが知られている。そ
のため、大気雰囲気の場合は、鉄を酸化させないため３
００〜４００℃での加熱が好ましい。そのほかに、窒素
等の不活性雰囲気で加熱することも有効である。The waste materials such as spools and runners produced during the injection molding of zirconia ceramics are composed of a mixture of zirconia powder and a compound, which is an organic compound such as a resin, mixed with metallic foreign substances. Since the foreign matter of the metal exists inside the waste material, it is necessary to remove the organic matter in order to efficiently dissolve and remove it with an acid. For removal of organic substances, removal by heating using a degreasing furnace in the process of manufacturing products by solvent extraction or injection molding of ceramics can be considered. In the removal by heating, it is an important point to efficiently dissolve and remove the foreign matter of the metal by not oxidizing it. It is known from analysis that most of this metal is iron. Therefore, in the atmospheric atmosphere, iron is not oxidized, so 3
Heating at 00-400 ° C is preferred. In addition, heating in an inert atmosphere such as nitrogen is also effective.
【０００６】酸としては、硝酸、硫酸、塩酸、王水等が
考えられるが、陰イオンが残留し難く焼結したセラミッ
クスに悪影響を与えない硝酸が好ましい。As the acid, nitric acid, sulfuric acid, hydrochloric acid, aqua regia, and the like can be considered, but nitric acid is preferable because it does not easily leave anions and does not adversely affect the sintered ceramics.
【０００７】[0007]
【実施例】以下、実施例により本発明を説明する。 実施例１ アクリル系ジルコニアコンパウンドの射出成形で副産物
として得られたスプールおよびランナー１ｋｇを試料と
して用いた。試料を脱脂炉を用い大気中３５０℃で２時
間加熱した。次に、ガラス製の容器に移し１級試薬の硝
酸を試料全体が浸る程度加え、かくはんしながら９０℃
で５時間加熱した。加熱後純水により水洗し、再び脱脂
炉を用い大気中４５０℃で１時間加熱し、完全に有機物
を除去しジルコニア粉末を得た。 実施例２ アクリル系ジルコニアコンパウンドの射出成形で副産物
として得られたスプールおよびランナー１ｋｇを試料と
して用いた。試料にアセトンを加え溶解した後、濾過し
エタノールで洗浄した。次に、ガラス製の容器に移し１
級試薬の硝酸を試料全体が浸る程度加え、かくはんしな
がら９０℃で３時間加熱した。加熱後純水により水洗
し、１４０℃で２時間真空乾燥することによりジルコニ
ア粉末を得た。The present invention will be described below with reference to examples. Example 1 1 kg of a spool and a runner obtained as a by-product in injection molding of an acrylic zirconia compound was used as a sample. The sample was heated for 2 hours at 350 ° C. in the atmosphere using a degreasing furnace. Next, transfer to a glass container and add nitric acid as a first-grade reagent to the extent that the entire sample is immersed.
Heated for 5 hours. After heating, it was washed with pure water and again heated in the air at 450 ° C. for 1 hour in a degreasing furnace to completely remove organic substances and obtain zirconia powder. Example 2 1 kg of a spool and a runner obtained as a by-product in the injection molding of an acrylic zirconia compound was used as a sample. After acetone was added to the sample to dissolve it, it was filtered and washed with ethanol. Next, transfer to a glass container 1
Nitric acid as a grade reagent was added to such an extent that the entire sample was immersed, and the mixture was heated at 90 ° C. for 3 hours while stirring. After heating, it was washed with pure water and vacuum dried at 140 ° C. for 2 hours to obtain a zirconia powder.
【０００８】溶媒で有機物を取り除いたため、金属の異
物は酸化されず実施例１より短時間で異物の除去が可能
であった。 実施例３ アクリル系ジルコニアコンパウンドの射出成形で副産物
として得られたスプールおよびランナー１ｋｇを試料と
して用いた。試料を脱脂炉を用い窒素雰囲気５００℃で
２時間加熱し完全に有機物を除去した。次に、ガラス製
の容器に移し１級試薬の硝酸を試料全体が浸る程度加
え、かくはんしながら９０℃で３時間加熱した。加熱後
純水により水洗し、１４０℃で２時間真空乾燥すること
によりジルコニア粉末を得た。Since the organic matter was removed by the solvent, the foreign matter of the metal was not oxidized and the foreign matter could be removed in a shorter time than in Example 1. Example 3 A spool and 1 kg of a runner obtained as a by-product in injection molding of an acrylic zirconia compound were used as a sample. The sample was heated in a nitrogen atmosphere at 500 ° C. for 2 hours using a degreasing furnace to completely remove organic substances. Next, it was transferred to a glass container and nitric acid as a first-grade reagent was added to such an extent that the entire sample was dipped, and heated at 90 ° C. for 3 hours while stirring. After heating, it was washed with pure water and vacuum dried at 140 ° C. for 2 hours to obtain a zirconia powder.
【０００９】窒素雰囲気で加熱し有機物を取り除いたた
め、金属の異物は酸化されず実施例１より短時間で異物
の除去が可能であった。Since the organic matter was removed by heating in a nitrogen atmosphere, the metallic foreign matter was not oxidized and it was possible to remove the foreign matter in a shorter time than in Example 1.
【００１０】[0010]
【発明の効果】本発明によると、スプール・ランナー等
の廃材から異物の少ないジルコニア粉末を回収すること
が出来る。特に成形品本体よりスプール・ランナーの方
が大きくなる微小部品作製時には廃材が再使用でき有効
である。According to the present invention, it is possible to recover zirconia powder containing few foreign substances from waste materials such as spools and runners. In particular, waste material can be reused when manufacturing minute parts where the spool / runner is larger than the molded product body, which is effective.
フロントページの続き (72)発明者 宍戸 晃哉 東京都江東区亀戸６丁目31番１号 セイコ ー電子工業株式会社内Front page continuation (72) Inventor Koya Shishido 6-31-1, Kameido, Koto-ku, Tokyo Seiko Electronics Industry Co., Ltd.
Claims (1)
成する廃材を脱脂した後、酸により異物を除去すること
を特徴としたジルコニア粉末の再生方法。Claim: What is claimed is: 1. A method for regenerating zirconia powder, which comprises degreasing a waste material produced during injection molding of zirconia ceramics, and then removing foreign matter with an acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3191856A JPH0532416A (en) | 1991-07-31 | 1991-07-31 | Method for regenerating zirconia powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3191856A JPH0532416A (en) | 1991-07-31 | 1991-07-31 | Method for regenerating zirconia powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0532416A true JPH0532416A (en) | 1993-02-09 |
Family
ID=16281649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3191856A Pending JPH0532416A (en) | 1991-07-31 | 1991-07-31 | Method for regenerating zirconia powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0532416A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020235476A1 (en) * | 2019-05-22 | 2020-11-26 | 株式会社日本触媒 | Zirconium oxide nanoparticles, dispersion liquid and resin composition |
| CN113292336A (en) * | 2021-06-15 | 2021-08-24 | 先导薄膜材料（广东）有限公司 | Method for recycling zirconia ceramic waste |
-
1991
- 1991-07-31 JP JP3191856A patent/JPH0532416A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020235476A1 (en) * | 2019-05-22 | 2020-11-26 | 株式会社日本触媒 | Zirconium oxide nanoparticles, dispersion liquid and resin composition |
| JPWO2020235476A1 (en) * | 2019-05-22 | 2020-11-26 | ||
| CN113292336A (en) * | 2021-06-15 | 2021-08-24 | 先导薄膜材料（广东）有限公司 | Method for recycling zirconia ceramic waste |
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