【発明の詳細な説明】
（ａ）産業上の利用分野
機能性材料に間速して、物理的あるいは化学的に多様な
特性を持つ微粒子が、エレクトロニクス素材、ファイン
セラミクスなと各方面で重要視されつつある．
この発明は、このような微粒子を効率よくしかも低コス
トで製造するための微粉砕機の粉砕媒体に間するもので
ある．
（ｂ）従来の技術
円板状の媒体を運動させて、粉砕を進行させるタイプの
ものとしては、円板粉砕機の円板状粉砕媒体があるがあ
る（特公昭（３０−３ １ ８３７号公ｆ８）．その研
究成果は、 ｌ９８８年日本鉱業会春期大会において発
表されている．
（Ｃ）発明が解決しようとする問題点
しかし、上記円板粉砕機においては、粉砕媒体が粉砕室
内を転がり、微粒子製造に有効と言われている摩砕作用
を引き起こしうる、摩耗現象を機械的に十分に生じさせ
られないという問題点を有する．
（ｄ）問題点を解決するための手段
そこで、本発明者らは、より粉砕性を向上させるために
種々研究を行った結果本発明の偏心円板粉砕媒体を発明
した．本偏心円板粉砕媒体では、その重心が下方にある
ため粉砕室壁を転がることなく滑って動き、その結果と
して、微粉砕に有効な摩耗作用を起こすことが、機械的
に可能となった．
この様に、本発明の県心円板粉砕媒体を用いるときにも
、粉砕富内での媒体同士の乗り上げによる粉砕効果の低
下を防ぐ意味で、上記特許公報に示しｋのと同様に、円
板直径は、粉砕室直径の１７２以上である４とが必要で
ある．
（ｅ）発明の効果・用途
偏心円板粉砕媒体を用いた粉砕機は、従来の円板状粉砕
媒体などを用いた他の微粉砕機に比べて、砕料をより微
粉化することができ、サブミクロン粒子を効率よく製造
することが可能なため、超微粉砕機として有望であると
思われる．また、粉砕媒体の運動状態を改善することに
より摩砕効果を促進することを目的としている．
このため、微粉砕領域での、粉砕能率が向上し、サブミ
クロン粒子が多量に効率よく製造することが期待できる
．
以上述べたように、この発明は微粒子を効率よく、しか
も安価なエネルギーコストで製造する微粉砕機を提供す
る．
（ｆ）実施例
以下、本発明の実施例を、１１〜３図を基に説明する．
′ＩＰ．１図の媒体は半円形であり、第２図のものはさ
らに重心位置を低くするため第１図の媒体に切りかきを
いれたものである．
第３図の媒体では，従来の円板型粉砕媒体に黒塗部分の
池よりも比重の大きなもの付加して重心を低くするよう
工夫されている．また、万一ひっくり返った場合でも、
媒体に破損がなく、すぐに復帰できる構造になっている
．
！１〜３図に示したそれぞれの媒体とも、数枚を粉砕原
料と共に円筒状の粉砕室に入れ、粉砕室を回転させるこ
とによって、粉砕媒体と粉砕富側壁に挟まった粉砕原料
を粉砕する．
その際、特公昭６０−３ １ ８３７号公報に示す、円
板状粉砕媒体では、重心が円板中心と一致しているため
転がって運動する場合が多い．しかし，第１〜３図に示
す偏心式粉砕媒体を用いることによって、媒体は転がる
ことなく、微粉砕に有効と言われている摩砕現象を機械
的に十分実現できる．したがって、粉砕媒体の重心は、
できるだけ低くする方が良好と考えられる．
また、粉砕面での圧縮力を大きくするため、粉砕媒体の
材質は、比重の大きなものを用いるの′が望ましい．Detailed Description of the Invention (a) Industrial Application Fields Fine particles with diverse physical and chemical properties are becoming important in various fields such as electronic materials and fine ceramics, as well as functional materials. It is being done. The present invention provides a grinding medium for a pulverizer for producing such fine particles efficiently and at low cost. (b) Prior art A disk-shaped grinding medium of a disk crusher is a type of grinding that progresses grinding by moving a disk-shaped medium. Public f8).The results of this research were announced at the 1988 Spring Conference of the Japan Mining Society. (C) Problems to be solved by the invention However, in the above-mentioned disc crusher, the crushing media rolls inside the crushing chamber. However, there is a problem in that it is not possible to mechanically sufficiently generate the abrasion phenomenon that can cause the attrition action that is said to be effective in producing fine particles. (d) Means for solving the problem Therefore, the present invention As a result of conducting various studies to further improve the crushability, the authors invented the eccentric disk grinding medium of the present invention.In this eccentric disk grinding medium, since its center of gravity is located below, it rolls on the wall of the grinding chamber. As a result, it has become mechanically possible to cause an abrasion effect that is effective for fine pulverization.In this way, when using the prefectural disc grinding media of the present invention, it is possible to In order to prevent the deterioration of the pulverizing effect due to media running over each other in the tofu, the diameter of the disk must be 4, which is 172 or more than the diameter of the pulverizing chamber, similar to k shown in the above patent publication. e) Effects/Applications of the Invention A pulverizer using an eccentric disc pulverizing medium can further pulverize the crushed material compared to other pulverizers using conventional disc-shaped pulverizing media, etc. Since it is possible to efficiently produce submicron particles, it seems to be promising as an ultrafine grinder.It also aims to promote the grinding effect by improving the motion state of the grinding media. Therefore, it is expected that the grinding efficiency in the fine grinding area will improve and that submicron particles can be efficiently produced in large quantities.As described above, this invention can efficiently produce fine particles at low energy costs. (f) Examples Examples of the present invention will be described below with reference to Figures 11 to 3. 'IP. The medium in Figure 1 is semicircular, and the In order to further lower the center of gravity, a cut has been made in the media shown in Figure 1. In the media shown in Figure 3, a material with a larger specific gravity than the pond shown in black is added to the conventional disk-shaped grinding media. It is designed to lower the center of gravity by adding additional weight.In addition, even if it turns over,
The structure is such that the media is not damaged and can be restored immediately. ! Several sheets of each of the media shown in Figures 1 to 3 are put into a cylindrical crushing chamber together with the crushed raw material, and by rotating the crushing chamber, the crushed raw material sandwiched between the crushing media and the crushing side wall is crushed. In this case, the disk-shaped grinding medium shown in Japanese Patent Publication No. 60-31-837 often rolls and moves because its center of gravity coincides with the center of the disk. However, by using the eccentric grinding media shown in Figures 1 to 3, the grinding phenomenon that is said to be effective for fine grinding can be mechanically fully realized without the medium rolling. Therefore, the center of gravity of the grinding media is
It is considered better to keep it as low as possible. Additionally, in order to increase the compressive force on the crushing surface, it is desirable to use a material with a high specific gravity for the crushing media.
【図面の簡単な説明】[Brief explanation of the drawing]
第１〜３図とも（ａ）が正面図、 （ｂ）が副面図であ
る．In Figures 1 to 3, (a) is a front view, and (b) is a side view.