JP3868566B2 - Melt forming method and apparatus used therefor - Google Patents

Description

【００１２】
表１から明らかなように、注水しない場合は、どの処理量も４０ｍｍオーバーが６０％以上あり粒度が大きい。また剥離性も悪く、スクレーパーによる掻残しも見られた。これに対し、回転板２に前注水管８ａ、８ｂから注水した場合、どの処理量も粒度のピークは、２５〜４０ｍｍと小さくなった。さらに後注水管９ｂより注水を追加した場合は、より粒度が小さくなり１５〜２５ｍｍに粒度のピークが見られ、注水調節の顕著な効果が得られた。
【００１３】
図３は、本発明の他の例で回転板を一対用いた成形装置の一部切断正面略図である。
図４は、図３のＸ・Ｘ線断面平面略図である。
以下の説明においては、前記図１について説明した構成要素と同様の要素は、同一符号を用い、詳細説明は省略する。又図１で使用した符号に加えて、一対の構成要素はそれぞれ上段側にｃ、下段側にｄ、単一の構成要素はそれぞれにｃのサフィックスを付してある。
図３、４において、成形装置１ｃの内部には中空回転軸４ｃ、４ｄに上下に段差をつけ且つ後述する溶融物Ｍの落下範囲Ｍｃを中心として一部が重なるように固着された一対の回転板上段２ｃ、下段２ｄに冷却室３ｃ、３ｄが設けられている。回転軸４ｃ、４ｄの下部に連結されたモータ５ｃ、５ｄが図４に示す時計回り方向Ｑ及び反時計回り方向Ｒに駆動回転し得る様に取り付けられている。回転板２ｃ、２ｄには、図４に示すように、扇形切欠部α、β（図の例では１３５度）が設けられているが、駆動回転中において落下範囲Ｍｃには回転板２ｃ、２ｄのいずれかが位置するようにされている。
回転軸４ｃ、４ｄには上下を貫通する排水パイプ７ｃ、７ｄが立設され、下端部の給水管６ｃ、６ｄから複数の放射パイプ１４ｃ、１４ｄを通して回転板２ｃ、２ｄ内に形成した冷却室３ｃ、３ｄに冷却水を供給して回転板２ｃ、２ｄを冷却可能としている。又冷却室３ｃ、３ｄで回転板２ｃ、２ｄを冷却した冷却水は排水パイプ７を流下して下端開口部より排水される。この構造により回転板２ｃ、２ｄは常時冷却水により冷却状態に保持される。
【００１４】
さらに、回転板２ｃ、２ｄ外周には間隔をおいて水冷カバー１２ｃ、１２ｄが囲繞され、該水冷カバー１２ｃ、１２ｄ上端に破線で示す溶融炉Ｆが連結され、該溶融炉Ｆで溶融された溶融物Ｍが駆動回転位置によって回転板２ｃ、２ｄ上のいずれかに供給される様配置され、溶融物Ｍは回転板２ｃ、２ｄの中心からずれた位置に落下可能とされている。水冷カバー１２ｃ上から溶融物Ｍの落下範囲Ｍｃの上流側に前注水管８から８ｃ_１、８ｃ_２、８ｄ_１、８ｄ_２、下流側に後注水管９から９ｃ_１、９ｃ_２、９ｄ_１、９ｄ_２が延長して設けられ回転板２ｃ、２ｄ上に注水され、注水の供給、停止及び水量について選択調整可能とされている。回転板２ｃ、２ｄ上には下流側に板状のスクレパー１０ｃ、１０ｄが傾斜面を横切って配設され、該スクレパー１０ｃ、１０ｄの下端末下方にスクリュウー軸１５、収集室１６を介して排出口１１ｃが連設されている。水冷カバー１２ｃ、１２ｄ下端の排出口１１ｃから外れた位置に、回転板２ｃ、２ｄ上から流下した水が排水可能な排水口（図示省略）が設けられている。スクリュウー軸１５はモータ５ｃによって駆動される。
【００１５】
次に、図３、４により、本発明の成形装置１ｃ及び成形方法の作動について説明する。
回転板２ｃ、２ｄをモータ５ｃ、５ｄにより前記の方向Ｑ、Ｒに通常０．１〜２０ｒｐｍの範囲で低速回転駆動し、上流側の前注水管８ｃ_１、８ｃ_２、８ｄ_１、８ｄ_２から回転板２ｃ、２ｄ上に注水し水膜が形成され、このいずれかの水膜上に溶融炉Ｆで溶融された溶融物Ｍが落下範囲Ｍｃに供給される。後注水管９ｃ_１、９ｃ_２、９ｄ_１、９ｄ_２からの注水は、所望粒径に対応して選択調整する。ここで、溶融物Ｍは回転板２ｃ、２ｄ上に供給され延べ板状になり、冷却され成形物となり、回転板２ｃ、２ｄ上で回転冷却中に破砕が進行する。破砕された成形物は、下流側のスクレパー１０ｃ、１０ｄにより掻取られ、スクリュウー軸１５、収集室１６を経て排出口１１ｃから排出される。また回転板２ｃ、２ｄ上から流下した水は、排水口より排出される。
成形物の成形状態及び粒度調整は、図１、２で前記説明した成形装置１及び成形方法と同様である。
又成形装置１ｃは一対の回転板２ｃ、２ｄを用いているが、これに限定されず３個以上の複数としてもよい。
【００１６】
本発明の成形方法及び成形装置においては、回転板の表面エネルギーの状態を従来より小さくし、低速回転する回転板上に注水して水膜を形成させ、回転板上に溶融状態にある溶融物を落下させ、溶融物を実質的に遠心力を作用させることなく冷却しつつ粒状に成形することとした。
すなわち、例えば平板上に落下させた水銀球が丸くなるように、低速回転の回転板上に水膜を張り、その表面に溶融物を落下させることで水と溶融物の表面張力の違いから、水膜のない場合に比べ、成形物の厚みを厚くすることを可能とし、溶融物は延べ板状になるものの、回転板上での冷却と注水の量と場所をコントロールすることで、破砕を進行せしめ所望の粒度に調整が可能である。回転板は冷却室で間接的に水で冷却するものの、さらに注水して水膜を張ることにより回転板の変形を防ぎ、その保護を図ると共に、溶融物を冷却して破砕させまた回転板と成形物の剥離性を向上させるよう作用する。
注水箇所は、溶融物の落下範囲の前後に設け、粒度を小さくする場合は落下点の前後から注水し、水量も多くすることで溶融物がより急速に冷却し粒度を小さくすることができる。又粒度を大きくする場合は、注水を落下点の前のみとし水量を絞ることで成形物の粒度を大きくすることができる。
【００１７】
【発明の効果】
・ 低速回転する回転板２上に注水して水膜ｗを形成させるので、溶融物Ｍに実質的に遠心力を作用させることなく、冷却しつつ、粒状に成形することができる。
・ 前注水管８ａ、８ｂ及び後注水管９ａ、９ｂからの注水を選択調節することにより成形物Ｓの粒度を調節することができる。すなわち、後注水管９bから注水すると、注水しない場合に比べて、粒度は小さくなる。前注水管８ａ、８ｂからも注水を追加すると、粒度はさらに小さくなる。（段落番号［００１２］・［表１］ 参照
）。
・ 注水を行うと、回転板２の表面に水膜ｗが形成されるので、成形物Ｓの剥離性が向上する（段落番号［０００９］・［表１］参照）。
【図面の簡単な説明】
【図１】本発明の成形装置の一例の概略図であって、（ａ）全体縦断面図、（ｂ）内部平面略図である。
【図２】図１の成形装置の回転板上の成形状態を示す拡大説明図であって、（ａ）従来例、（ｂ）及び（ｃ）本発明の例である。
【図３】本発明の他の例で回転板を一対用いた成形装置の一部切断正面略図である。
【図４】図３のＸ・Ｘ線断面平面略図である。
【符号の説明】
１、１ｃ 成形装置
２、２ｃ、２ｄ 回転板
３、３ｃ、３ｄ 冷却室
４、４ｃ、４ｄ 回転軸
５ ５ｃ、５ｄ、５ｅ モータ
６、６ｃ、６ｄ 給水管
７、７ｃ、７ｄ 排水パイプ
８、８ａ、８ｂ、８ｃ_１、８ｃ_２、８ｄ_１、８ｄ_２ 前注水管
９、９ａ、９ｂ、９ｃ_１、９ｃ_２、９ｄ_１、９ｄ_２ 後注水管
１０、１０ｃ、１０ｄ スクレーパー
１１、１１ｃ 排出口
１２、１２ｃ、１２ｄ 水冷カバー
１３ 排水口
１４ｃ、１４ｄ 放射パイプ
１５ スクリュウー軸
１６ 収集室
Ｆ 溶融炉
Ｈ_１、Ｈ_２ 高さ
Ｍ 溶融物
Ｍａ、Ｍｃ 落下範囲
Ｓ 成形物
ｗ 水膜
Ｐ、Ｑ、Ｒ 回転方向
α、β 扇形切欠部
θ_１、θ_２ 接触角[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for forming a glass craft material, a waste material or the like having a melting point of 800 ° C. or more into a small lump or granular solid and an apparatus used therefor (hereinafter simply referred to as a forming method and a forming apparatus). About.
[0002]
[Prior art]
Examples of conventional molding methods and molding apparatuses include those described in JP-A-6-47366 and JP-A-3-83691.
In any of these methods, a melt in a molten state is dropped on a rotating plate, and the melt is indirectly cooled through cooling water in the rotating plate.
[0003]
[Problems to be solved by the invention]
In the prior art, the difference between the surface energy of the rotating plate and the surface energy of the melt is small, and the molded product is thinly and widely extended to obtain a thin plate-shaped molded product. In addition, the peelability between the melt and the rotating plate is poor, and the scraping plate rides on the molded product and may be insufficiently scraped. In addition, the particle size distribution of the molded product can be adjusted only by the number of rotations, the adjustment range is narrow, and it is difficult to obtain a desired particle size. Furthermore, when the amount of the melt increases, the molded product is not sufficiently cooled, and the melt is discharged as a large lump, which causes problems in the subsequent apparatus.
On the other hand, in the present invention, the rotating plate itself has high durability, the releasability between the rotating plate and the molded product is good, the scraping ability of the molded product is high, the quality of the obtained molded product is stable, and the particle size can be arbitrarily set. It is an object of the present invention to obtain a simple melt molding method and molding apparatus that can be adjusted in size.
[0004]
[Means for Solving the Problems]
The invention of claim 1 is as follows.
Water is poured onto a rotating plate that rotates at a low speed to form a water film, the molten material in a molten state is dropped onto the rotating plate, and the molten material is cooled to a granular shape while being substantially free of centrifugal force. A method for forming a melt, which comprises forming and allowing water injection onto a rotating plate before and after the dropping position of the melt, and adjusting the particle size of the formed product by selectively adjusting the water injection.
[0005]
The invention of claim 2 is as follows.
A rotating plate having a rotatable inclined surface connected to the melt supply means, and a pre-water injection pipe on the upstream side of the melt dropping point on the rotating plate and a post-water injection pipe on the rotating plate on the downstream side, respectively. Water is selectively poured onto the rotating plate rotating at a low speed to form a water film, and the falling melt on the rotating plate is cooled without substantially applying centrifugal force. A melt molding apparatus characterized in that it can be molded in a granular form.
The invention of claim 3 is as follows.
3. The melt molding apparatus according to claim 2 , wherein the water injection onto the rotating plate by the pre-injection pipe and the post-injection pipe can be selectively adjusted with respect to supply, stop, and amount of water.
The invention of claim 4 is as follows.
Sector notch a plurality of rotating plates vertically and partially stepped in is successively arranged so as to overlap a rotatably driven in opposite directions with, the melt according to claim 2 or 3 for the respective rotating plates A melt molding apparatus, characterized by using a molding apparatus.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
1A and 1B are schematic views of an example of a molding apparatus according to the present invention, in which FIG. 1A is an overall longitudinal sectional view, and FIG.
FIG. 2 is an enlarged explanatory view showing a molding state on the rotating plate of the molding apparatus of FIG. 1, and (a) a conventional example, (b) and (c) an example of the present invention.
In FIG. 1, a rotating plate 2 in which an outer peripheral end fixed to the upper end of a hollow rotating shaft 4 in the molding apparatus 1 forms an inclined surface with a downward slope, and the outer peripheral end of the rotating plate 2 is cooled downward. A chamber 3 is provided. This rotary plate 2, the motor 5 connected to a lower portion of the rotating shaft 4 is mounted so as be rotated in the counterclockwise direction P shown in FIG. 1 (b).
A drainage pipe 7 penetrating vertically is provided in the rotary shaft 4, and cooling water is supplied to a cooling chamber 3 formed in the rotary plate 2 from a water supply pipe 6 at the lower end through a gap between the rotary shaft 4 and the drainage pipe 7. Is supplied so that the rotating plate 2 can be cooled. The cooling water that has cooled the rotating plate 2 in the cooling chamber 3 flows down the drain pipe 7 at the center of the cooling chamber 3 and is drained from the lower end opening. With this structure, the rotating plate 2 is always kept in a cooled state by cooling water.
[0007]
Further, the rotating plate 2 circumference cooled cover 12 is surrounded at a distance, is connected the melting furnace F indicated by a broken line in the water-cooling cover 12 upper, melt M, which is melted in the melting furnace F is rotating plate The melt M is arranged so as to be supplied onto the fall plate 2 and can fall into the fall range Ma at a position shifted from the center of the rotating plate 2. The water-cooled cover 12, is capable water injection on the melt dropping range Ma upstream before the water injection tube 8a of M, 8b, downstream post injection tube 9a, 9b is set only is the rotating plate 2, the supply of water injection , Stop and water volume can be selected and adjusted.
On the rotary plate 2, a plate-shaped scraper 10 is disposed on the downstream side across the inclined surface, and a discharge port 11 is connected to the lower end lower water cooling cover 12 of the scraper 10. A drainage port 13 through which water that has flowed down from the rotating plate 2 can be drained is provided at a position off the discharge port 11 at the lower end of the water cooling cover 12.
[0008]
Next, the operation of the molding apparatus 1 and the molding method of the present invention will be described with reference to FIGS.
The rotating plate 2 is driven to rotate at a low speed within a range of usually 0.1 to 20 rpm by the motor 5, and at the same time, melted on the water film w formed by pouring water onto the rotating plate 2 from the upstream pre-water injection pipes 8a and 8b. A melt M melted in the furnace F is supplied. Water injection from the post-water injection pipes 9a and 9b is selected and determined according to a desired particle size as described later.
Here, the melt M is supplied to the rotating plate 2 to become a plate-like shape, is cooled on the rotating plate 2 to become a molded product S, and crushing proceeds in the direction P on the rotating plate 2 during rotational cooling. The crushed molded product S is scraped off by the downstream scraper 10 and discharged from the discharge port 11. Further, the water flowing down from the rotating plate 2 is discharged from the drain port 13. The residence time on the rotating plate 2 is adjusted by the number of revolutions. However, if the residence time is extremely short, the residence time is usually 15 seconds or more and within 5 minutes, preferably 30 because cooling and crushing do not proceed. It is taken within 3 minutes.
[0009]
2A, 2B, and 2C, the difference in molding state between the conventional example and the present invention will be described.
FIG. 2 (a) shows the case of molding with a conventional molding apparatus. Although the rotating plate 2 is indirectly cooled with cooling water, the surface temperature of the rotating plate 2 is large because the temperature difference with the melt M is as large as 80 ° C. or more. Rises, the surface of the rotating plate 2 changes its thermal composition, and the peelability between the molded product S and the rotating plate 2 becomes poor. In particular, when the temperature of the melt M is as high as 1400 ° C. or higher, the rotating plate 2 may be thermally deformed. Further, the contact angle θ ₁ of the melt M on the surface of the rotating plate 2 is small, and as a result, the height H ₁ when the melt M is formed becomes small.
FIG. 2B shows a case where the molding apparatus of FIG. 1 is used, and a water film w is formed on the rotating plate 2 by the water injected by the water injection pipe 8 or 9, and the melt M and the rotating plate 2 are directly formed. Since contact with the rotating plate 2 is eliminated, the change in the thermal composition of the surface of the rotating plate 2 can be prevented, the peelability of the molded product S is improved, and the amount of heat transfer from the melt M is reduced by the formation of the water film w. The rise in surface temperature is low, and thermal deformation of the rotating plate 2 can be prevented. Further, the contact angle θ ₂ is large due to the difference in temperature and physical properties between the water film w and the melt M, and as a result, the height H ₂ of the molded product S can be increased, and the effect of increasing the particle size can be obtained.
In FIG. 2C, in order to further adjust the particle size, water is injected from the post-injection pipes 9a and / or 9b and the amount of water injected is controlled. When water is injected from the post-injection pipe 9a, a water film w is formed between the molded product S and the rotating plate 2, so that the peelability is further improved, but the particle size is smaller than that in the case of not injecting water from the post-injection pipe 9a. . Further, the post-water injection pipe 9b is arranged so that water is directly applied to the molded product S, and the particle size can be further reduced as compared with the case where water is injected only from the post-water injection pipe 9a. Even in this case, the particle size of the molded product S can be increased as compared with the case where the melt M is dropped directly into water and cooled. That is, it is possible to widely adjust the particle size of the molded product S by adjusting the water injection from the water injection pipes 8, 9, 9a, 9b.
[0010]
【Example】
Composition (SiO ₂ 40.1%, Al ₂ O ₃ 17.2%, CaO 21.4%, Fe ₂ O ₃ 4.2%, P ₂ O ₅ 6.9%, MgO 0.8%, Na ₂ O 0.2%, K ₂ O 1.1%, others 8.1%) 1400 ° C. melt is supplied to the molding apparatus 1 of the present invention shown in FIG. 1 at a feed rate of 150 or 250 kg / hr. Then, it is supplied onto the rotating plate 2 having a rotational speed of 0.5 or 1 rpm, and water injection adjustment from the water injection pipes 8a, 8b and 9b is performed in combination, and the particle size distribution of the obtained molded product S is measured and shown in Table 1. Show.
[0011]
[Table 1]

[0012]
As can be seen from Table 1, when no water is poured, the amount of treatment is 40% over 60% or more and the particle size is large. Further, the peelability was poor, and scraping with a scraper was also observed. On the other hand, when water was poured into the rotating plate 2 from the pre-water injection pipes 8a and 8b, the particle size peak was as small as 25 to 40 mm for any treatment amount. Furthermore, when water injection was added from the post-injection pipe 9b, the particle size became smaller and a particle size peak was observed at 15 to 25 mm, and a remarkable effect of water injection control was obtained.
[0013]
FIG. 3 is a partially cut front schematic view of a molding apparatus using a pair of rotating plates in another example of the present invention.
4 is a schematic cross-sectional plan view taken along the line X and X in FIG.
In the following description, the same components as those described with reference to FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. Further, in addition to the reference numerals used in FIG. 1, the pair of components is suffixed with c on the upper side, d on the lower side, and c on each of the single components.
3 and 4, inside the molding apparatus 1c, a pair of rotations are provided so that the hollow rotary shafts 4c and 4d are stepped up and down and are partially overlapped with each other around a fall range Mc of the melt M described later. Cooling chambers 3c and 3d are provided on the upper plate 2c and the lower plate 2d. Rotary shaft 4c, a motor 5c, which is connected to the lower portion of 4d, 5d are mounted so as be rotated in the clockwise direction Q and counter-clockwise direction R shown in FIG. As shown in FIG. 4, the rotary plates 2 c and 2 d are provided with fan-shaped notches α and β (135 degrees in the illustrated example), but the rotary plate 2 c and 2 d are in the drop range Mc during driving rotation. One of them is supposed to be located.
Drain pipes 7c and 7d penetrating vertically are provided on the rotary shafts 4c and 4d, and the cooling chamber 3c formed in the rotary plates 2c and 2d from the water supply pipes 6c and 6d at the lower end through the plurality of radiation pipes 14c and 14d. The rotating plates 2c and 2d can be cooled by supplying cooling water to 3d. The cooling water that has cooled the rotating plates 2c and 2d in the cooling chambers 3c and 3d flows down the drain pipe 7 and is drained from the lower end opening. With this structure, the rotating plates 2c and 2d are always kept in a cooled state by cooling water.
[0014]
Further, water cooling covers 12c and 12d are surrounded on the outer periphery of the rotating plates 2c and 2d with a space therebetween, and a melting furnace F indicated by a broken line is connected to the upper ends of the water cooling covers 12c and 12d. The product M is arranged so as to be supplied to any one of the rotary plates 2c and 2d depending on the driving rotational position, and the melt M can be dropped to a position shifted from the center of the rotary plates 2c and 2d. From the water cooling cover 12c to the upstream side of the falling range Mc of the melt M, pre-water injection pipes 8 to 8c ₁ , 8c ₂ , 8d ₁ , 8d ₂ and downstream water injection pipes 9 to 9c ₁ , 9c ₂ , 9d ₁ , 9d ₂ is extended and water is poured onto the rotating plates 2c and 2d, and selection and adjustment can be made with respect to supply, stop, and amount of water injection. On the rotary plates 2c and 2d, plate-shaped scrapers 10c and 10d are disposed on the downstream side across the inclined surface, and the discharge ports are provided below the scrapers 10c and 10d via the screw shaft 15 and the collection chamber 16 below the terminal. 11c is continuously provided. The water cooling covers 12c and 12d are provided with drainage ports (not shown) through which the water that has flowed down from the rotary plates 2c and 2d can be drained from the discharge ports 11c at the lower ends. The screw shaft 15 is driven by a motor 5c.
[0015]
Next, the operation of the molding apparatus 1c and the molding method of the present invention will be described with reference to FIGS.
The rotary plates 2c and 2d are driven to rotate at a low speed in the range of usually 0.1 to 20 rpm in the directions Q and R by the motors 5c and 5d, and from the upstream pre-water injection pipes 8c ₁ , 8c ₂ , 8d ₁ and 8d _2. Water is poured onto the rotating plates 2c and 2d to form a water film, and the melt M melted in the melting furnace F on any of the water films is supplied to the drop range Mc. Water injection from the post-water injection pipes 9c ₁ , 9c ₂ , 9d ₁ , 9d ₂ is selected and adjusted according to the desired particle size. Here, the melt M is supplied onto the rotating plates 2c and 2d to form a plate-like shape, cooled to become a molded product, and crushing proceeds during the rotation cooling on the rotating plates 2c and 2d. The crushed molded product is scraped off by the scrapers 10 c and 10 d on the downstream side, and is discharged from the discharge port 11 c through the screw shaft 15 and the collection chamber 16. Further, the water flowing down from the rotary plates 2c and 2d is discharged from the drain port.
The molding state and particle size adjustment of the molded product are the same as those of the molding apparatus 1 and the molding method described above with reference to FIGS.
Moreover, although the shaping | molding apparatus 1c uses a pair of rotating plate 2c, 2d, it is not limited to this, It is good also as three or more.
[0016]
In the molding method and molding apparatus of the present invention, the surface energy state of the rotating plate is made smaller than before, water is poured onto the rotating plate that rotates at a low speed to form a water film, and the molten material is in a molten state on the rotating plate. The molten material was dropped into a granular shape while cooling without substantially applying centrifugal force.
That is, for example, from a difference in the surface tension of water and melt by dropping a melt on the surface of a low-speed rotating plate so that the mercury sphere dropped on a flat plate becomes round, Compared to the case without a water film, it is possible to increase the thickness of the molded product, and the melt becomes a plate-like shape, but by controlling the amount and location of cooling and water injection on the rotating plate, crushing can be achieved. It can be advanced and adjusted to the desired particle size. Although the rotating plate is indirectly cooled with water in the cooling chamber, the rotating plate is further poured to form a water film to prevent the rotating plate from being deformed and protected, and the melt is cooled and crushed. It acts to improve the peelability of the molded product.
Water injection points are provided before and after the fall range of the melt, and when the particle size is reduced, water is injected from before and after the drop point, and the amount of water is increased so that the melt can be cooled more rapidly and the particle size can be reduced. When the particle size is increased, the particle size of the molded product can be increased by reducing the amount of water only when the water is poured before the drop point.
[0017]
【The invention's effect】
-Water is poured onto the rotating plate 2 that rotates at a low speed to form the water film w, so that the melt M can be formed into a granular shape while cooling without substantially applying centrifugal force.
The particle size of the molded product S can be adjusted by selectively adjusting the water injection from the pre-water injection pipes 8a and 8b and the post-water injection pipes 9a and 9b. That is, when water is injected from the post-injection pipe 9b, the particle size becomes smaller than when water is not injected. When water is added also from the pre-water injection pipes 8a and 8b, the particle size is further reduced. (See paragraph numbers [0012] and [Table 1]).
-When water is injected, a water film w is formed on the surface of the rotating plate 2, so that the peelability of the molded product S is improved (see paragraphs [0009] and [Table 1]).
[Brief description of the drawings]
1A and 1B are schematic views of an example of a molding apparatus according to the present invention, in which FIG. 1A is an overall longitudinal sectional view, and FIG.
2 is an enlarged explanatory view showing a molding state on a rotating plate of the molding apparatus of FIG. 1, (a) a conventional example, (b) and (c) an example of the present invention.
FIG. 3 is a partially cut front schematic view of a forming apparatus using a pair of rotating plates in another example of the present invention.
4 is a schematic cross-sectional plan view taken along the line X—X in FIG. 3;
[Explanation of symbols]
1, 1c Molding device 2, 2c, 2d Rotating plate 3, 3c, 3d Cooling chamber 4, 4c, 4d Rotating shaft 5 5c, 5d, 5e Motor 6, 6c, 6d Water supply pipe 7, 7c, 7d Drain pipe 8, 8a 8b, 8c ₁ , 8c ₂ , 8d ₁ , 8d ₂ pre-water injection pipes 9, 9a, 9b, 9c ₁ , 9c ₂ , 9d ₁ , 9d ₂ post-water injection pipes 10, 10c, 10d scraper 11, 11c 12c, 12d water cooling cover 13 drainage port 14c, 14d radiation pipe 15 Sukuryuu shaft 16 collection chamber F melting furnace _H 1, _{H 2} height M melt Ma, Mc drop range S moldings w water film P, Q, R rotational direction α, β Fan-shaped notch θ ₁ , θ ₂ Contact angle

Claims (4)

Water is poured onto a rotating plate that rotates at a low speed to form a water film, the molten material in a molten state is dropped onto the rotating plate, and the molten material is cooled to a granular shape while being substantially free of centrifugal force. A method for forming a melt, which comprises forming and allowing water injection onto a rotating plate before and after the dropping position of the melt, and adjusting the particle size of the formed product by selectively adjusting the water injection . A rotating plate having a rotatable inclined surface connected to the melt supply means, and a pre-water injection pipe on the upstream side of the melt dropping point on the rotating plate and a post-water injection pipe on the rotating plate on the downstream side, respectively. Water is selectively poured onto the rotating plate rotating at a low speed to form a water film, and the falling melt on the rotating plate is cooled without substantially applying centrifugal force. A melt molding apparatus characterized in that it can be molded in a granular form. 3. The melt molding apparatus according to claim 2 , wherein the water injection onto the rotating plate by the pre-injection pipe and the post-injection pipe can be selectively adjusted with respect to supply, stop, and amount of water. Sector notch a plurality of rotating plates vertically and partially stepped in is successively arranged so as to overlap a rotatably driven in opposite directions with, the melt according to claim 2 or 3 for the respective rotating plates A melt molding apparatus, characterized by using a molding apparatus.

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