JP2003107189A - Powder scattering preventing device of rotary molding machine for manufacturing nuclear fuel pellet - Google Patents
Powder scattering preventing device of rotary molding machine for manufacturing nuclear fuel pelletInfo
- Publication number
- JP2003107189A JP2003107189A JP2001306045A JP2001306045A JP2003107189A JP 2003107189 A JP2003107189 A JP 2003107189A JP 2001306045 A JP2001306045 A JP 2001306045A JP 2001306045 A JP2001306045 A JP 2001306045A JP 2003107189 A JP2003107189 A JP 2003107189A
- Authority
- JP
- Japan
- Prior art keywords
- nuclear fuel
- powder
- molding machine
- upper punch
- rotary molding
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0082—Dust eliminating means; Mould or press ram cleaning means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、核燃料粉末をペレ
ット状に成型する回転式成型機の操作中、核燃料粉末の
飛散を防止する装置に関するものである。
【０００２】
【従来の技術】従来、核燃料ペレットを製造する回転式
成型機はグローブボックス内にあって回転するテーブル
の面下に周方向に複数の臼を設け、この各臼の上下に臼
の周方向移動と共に周方向移動し、かつ臼内に向って上
下動する上杵と、下杵とを設け、テーブル、上杵及び下
杵をそれぞれ駆動する駆動部を設け、テーブル上に核燃
料粉末を供給し、テーブル面下の各臼内に掻き込む掻込
工程と、下杵、上杵にて臼内の核燃料粉末を予備加圧す
る予備圧縮工程と、臼内の上杵を更に押圧して核燃料ペ
レットに成型する成型工程と、成型された核燃料ペレッ
トをテーブル上に載置する載置工程と、成型された核燃
料ペレットをテーブル上より取り出す取出工程とを備
え、テーブルより臼内に順次供給された核燃料粉末を
上、下杵にて押圧して順次核燃料ペレットに成型してい
た。ところが、この回転式成型機を作動すると、核燃料
粉末が臼内に掻き込まれる際、杵で臼をつく際、臼内で
成型された核燃料ペレットを取り出す際、更には、回転
するテーブル上に核燃料粉末が残存し、この核燃料粉末
が上記操作中に巻き上げられて飛散し、成型機の駆動部
分にも付着、汚染していた。
【０００３】
【発明が解決しようとする課題】したがって、従来のこ
の種の回転式成型機にあっては、防塵カバーで回転式成
型機全体を密封して、排気ブロワー等の集塵装置で防塵
カバー内を吸引して核燃料粉末の飛散を防止するように
していたが、防塵カバーが異常に大型化すると共に上記
成型機全体特に駆動部にも核燃料粉末が付着し、清掃に
手間どり、しかも部品の交換等の保守、管理が煩わし
く、生産効率が悪いという問題があった。
【０００４】そこで、本発明は、このような従来の核燃
料ペレット製造用回転式成型機が有していた課題を解決
したものであって、回転式成型機の核燃料粉末の付着個
所を縮少して、清掃の容易さと共に回転式成型機の部品
交換と保守、管理とを容易にして生産効率を向上させた
ことを目的とした核燃料ペレット製造用回転式成型機の
粉末飛散防止装置を提供しようとするものである。
【０００５】
【課題を解決するための手段】該目的を達成するための
本発明の構成を、実施例説明において使用した符号を用
いて説明すると、本発明は、グローブボックス８内にあ
って回転するテーブル３の面下に周方向に複数の臼５，
５を設け、この各臼５の上下に臼の周方向移動と共に周
方向移動し、かつ臼内に向って上下動する上杵６と、下
杵７とを設け、テーブル３、上杵６及び下杵７をそれぞ
れ駆動する駆動部９，１０，１１を設け、テーブル３上
に核燃料粉末を供給し、テーブル面下の各臼５内に掻き
込む掻込工程Ａと、下杵７、上杵６にて臼５内の核燃料
粉末を予備加圧する予備圧縮工程Ｂと、臼５内の上杵６
を更に押圧して核燃料ペレットＸに成型する成型工程Ｃ
と、成型された核燃料ペレットＸをテーブル上に載置す
る載置工程Ｄと、成型された核燃料ペレットＸをテーブ
ル３上より取り出す取出工程Ｅとを備えた核燃料ペレッ
ト製造用回転式成型機１に於いて、上記掻込工程Ａ、予
備圧縮工程Ｂ、成型工程Ｃ、載置工程Ｄ及びテーブル３
上の残存する核燃料粉末を受ける受け機構Ｇと、この核
燃料粉末を吸引除去する吸引機構Ｈとを備えた粉末飛散
防止装置１２を設ける構成としたものである。
【０００６】
【発明の実施の形態】以下、本発明の実施例について図
に基づいて説明する。図中、図１乃至図４は、本発明の
１実施例を示す図であって、図１は本発明の１実施例を
示す正面図、図２は本発明のテーブル面上を示す概略説
明図、図３は本発明の粉末飛散防止構造を示す概略縦断
面図、図４は本発明の上杵、下杵の操作概略図である。
【０００７】核燃料ペレット製造用の回転式成型機１は
グローブボックス８内にあって、供給された核燃料粉末
をペレット状に成型する回転式のテーブル３と、このテ
ーブル面下の複数の臼５，５と、この各臼５，５内を上
下動する各上杵６，６と下杵７，７と、テーブル３を駆
動するテーブル用駆動部９と、上杵６、下杵７を駆動す
る上杵用駆動部１０、下杵用駆動部１１と、テーブル３
近傍で残存する核燃料粉末を吸引処理する粉末飛散防止
装置１２とから構成されている。１３はテーブルを回転
するメインシャフトである。
【０００８】回転式成型機１は原料供給口２より送られ
てきた核燃料粉末を回転式のテーブル３面の複数のフイ
ードシュ４，４に順次掃き集め、更にテーブル面下の複
数の臼５，５内に順次掻き込む（掻込工程Ａ）。この工
程Ａ中テーブル３面に核燃料粉末が残存することとな
る。次に、各臼５内を上下動する各上杵６と各下杵７と
にて臼５内の核燃料粉末を押圧（予備圧縮工程Ｂ）した
後、臼５内の上杵６を更に押圧降下し臼５内で固めて核
燃料ペレットＸに成型（成型工程Ｃ）する。この工程
Ｂ、Ｃ中上杵６の臼５内降下時、残存の核燃料粉末が巻
き上がり、又臼５内と臼内の下杵７との間の隙間より残
存の核燃料粉末が落下することとなる。
【０００９】更に、臼５内より上杵６を上昇し、臼５内
の下杵７を押上げることで成型された核燃料ペレットＸ
がテーブル面上に載置（載置工程Ｄ）され、回転するテ
ーブルと共に周方向移動し、製品取出しダンパ１４に沿
って製品取出しシュート１５から吸引されながら取り出
（取出工程Ｅ）される。この回転式成型機１の工程中テ
ーブル上の残存の核燃料粉末は遠心力で飛散し、又テー
ブルと共に移動する臼５や上下動する上杵６、下杵７に
よってうず流を生じテーブル周辺に飛散させることとな
る。
【００１０】このテーブル３と共に周方向に移動し、か
つ上下方向に移動する上杵６と下杵７とは図４に示すよ
うに、各工程に沿って周期的にその操作軌跡を通ってお
り、先ず、テーブル３面に核燃料粉末が供給され、臼５
内に収納（掻込工程Ａ）され予備圧縮工程Ｂ前まで上杵
６は臼５の上方に上昇した上昇区域Ｆにあり下杵７は臼
５内にある。次に、予備圧縮工程Ｂに入ると上杵６は上
杵用小ロール１６に沿って臼５内に入り、下杵７は下杵
用小ロール１７に沿って臼５内にそのまま残り、この臼
５内の上杵６、下杵７によって予備圧縮される。
【００１１】更に、成型工程Ｃに入ると上杵６は上杵用
大ロール１８に沿って臼５内に更に降下し、下杵７は下
杵用大ロール１９に沿って臼５内をわずかに上昇し、臼
５内の核燃料粉末を核燃料ペレットＸに成型する。次に
載置工程Ｄは臼５内の上杵６を上昇した後、臼内の下杵
７を臼内上方へ上昇して臼内の核燃料ペレットＸをテー
ブル３上に載置する。取出工程Ｅでは上杵６は臼５上方
に上昇したままで、下杵７は臼内にとどまる。この操作
軌跡を順次繰り返すこととなる。
【００１２】回転式成型機１の各工程及びテーブル上に
残存した核燃料粉末を吸引処理する粉末飛散防止装置１
２は、各工程で残存する核燃料粉末を受ける受け機構Ｇ
と、この核燃料粉末を吸引して飛散を防止しる吸引機構
Ｈとからなっている。粉末飛散防止装置１２の受け機構
Ｇはテーブル３面の残存する核燃料粉末がテーブルの回
転による遠心力でテーブル外に飛び出さないようテーブ
ル面外周に配設した粉末寄せスクレパ２０と、テーブル
面下の臼５と下杵７との隙間より落下した核燃料粉末を
受ける下部粉末受け皿２１とを備えている。
【００１３】この粉末寄せスクレパ２０は底面にフエル
ト２２をはめ込んでいる。この粉末寄せスクレパ２０は
回転式成型機１の両側スタンドフレームに上下方向フリ
ーなブラケットを取ることでテーブル上で固定されなが
ら、粉末寄せスクレパの自重でフエルト２２をテーブル
面に押しつけテーブル面上の核燃料粉末をテーブル内側
に拭き寄せている。下部粉末受け皿２１はテーブル面と
同時に回転しテーブル下部に円盤状に形成されている。
【００１４】粉末飛散防止装置１２の吸引機構Ｈは集塵
装置２３に接続された各吸引ノズル２４，２４を核燃料
粉末の飛散する各工程の所定個所に配置している。先ず
回転式成型機の掻込工程Ａでテーブル上に設置した吸引
ノズル２４は核燃料粉末がフイードシュ４に掃き集めら
れるとき、巻き上げられこの粉末を吸引し集塵装置２３
へ送っている。
【００１５】次に、予備圧縮工程Ｂ及び成型工程Ｃでテ
ーブル面の粉末寄せスクレパ２０内側に設置した吸引ノ
ズル２４は上杵６が臼内へ押圧するとき巻き上げられる
粉末を吸引し、又、下部粉末受け皿２１上面に設置した
吸引ノズル２４は下部粉末受け皿に溜まった粉末を吸引
し、更に、載置工程Ｄでテーブル面の粉末寄せスクレパ
２０内側に設置した吸引ノズル２４は上杵６が臼内より
上昇するとき巻き上げられる粉末を吸引し、それぞれ集
塵装置２３に接続されている。
【００１６】２４はテーブル上の粉末寄せスクレパ２０
を粉末が通過してしまったときに、せき止めて吸引する
吸引ノズルで、同じ集塵装置２３に接続されている。
又、取出工程Ｅで製品取出しシュート１５を吸引するこ
とで核燃料ペレットＸの取り出しと同時に流れてくるテ
ーブル上の雰囲気空気を吸引して粉末の飛散を防いでい
る。２５は吸引ノズル２４の差込み口のシールパッキン
で、２６は上杵駆動部用ダストシール、２７は下杵駆動
部用ダストシールである。
【００１７】以上本発明の代表的と思われる実施例につ
いて説明したが、本発明は必ずしもこれらの実施例構造
のみに限定されるものではなく、本発明にいう前記の構
成要件を備え、かつ、本発明にいう目的を達成し、以下
にいう効果を有する範囲内において適宜改変して実施す
ることができるものである。
【００１８】
【発明の効果】以上の説明から既に明らかなように、本
発明にいうところの核燃料ペレット製造用回転式成型機
の粉末飛散防止装置は、グローブボックス内にあって回
転するテーブルの面下に周方向に複数の臼を設け、この
各臼の上下に臼の周方向移動と共に周方向移動し、かつ
臼内に向って上下動する上杵と、下杵とを設け、テーブ
ル、上杵及び下杵をそれぞれ駆動する駆動部を設け、テ
ーブル上に核燃料粉末を供給し、テーブル面下の各臼５
内に掻き込む掻込工程と、下杵、上杵にて臼内の核燃料
粉末を予備加圧する予備圧縮工程と、臼内の上杵を更に
押圧して核燃料ペレットに成型する成型工程と、成型さ
れた核燃料ペレットをテーブル上に載置する載置工程
と、成型された核燃料ペレットをテーブル上より取り出
す取出工程とを備えた核燃料ペレット製造用回転式成型
機に於いて、上記掻込工程、予備圧縮工程、成型工程、
載置工程及びテーブル上の残存する核燃料粉末を受ける
受け機構と、この核燃料粉末を吸引除去する吸引機構と
を備えた粉末飛散防止装置を設ける構成としたものであ
るから、回転式成型機の核燃料粉末の飛散、付着個所を
縮少して、清掃を容易にする共に回転式成型機の部品交
換と保守、管理とを容易にして生産効率を向上させると
いう顕著な効果を期待することが出来るに至ったのであ
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing nuclear fuel powder from scattering during operation of a rotary molding machine for molding nuclear fuel powder into pellets. 2. Description of the Related Art Conventionally, a rotary molding machine for producing nuclear fuel pellets is provided with a plurality of dies in a circumferential direction below a surface of a rotating table in a glove box. An upper punch that moves in the circumferential direction along with the circumferential movement, and moves up and down toward the die, a lower punch is provided, and a drive unit that drives the table, the upper punch and the lower punch is provided, and the nuclear fuel powder is placed on the table. The step of feeding and scraping into each of the dies below the table surface, the pre-compression step of pre-pressing the nuclear fuel powder in the mortar with the lower and upper punches, and the nuclear fuel by further pressing the upper punch in the mortar A molding step for molding into pellets, a placing step of placing the molded nuclear fuel pellets on a table, and an unloading step of taking out the molded nuclear fuel pellets from the table, were sequentially supplied from the table into the die. Nuclear fuel powder up, lower punch To form nuclear fuel pellets sequentially. However, when this rotary molding machine is operated, when nuclear fuel powder is scraped into the mortar, when the mortar is made with a punch, when the nuclear fuel pellets molded in the mortar are taken out, the nuclear fuel is further placed on a rotating table. The powder remained, and the nuclear fuel powder was wound up and scattered during the above operation, and adhered to and contaminated the driving parts of the molding machine. Therefore, in this type of conventional rotary molding machine, the entire rotary molding machine is hermetically sealed with a dust-proof cover, and dust-proofed by a dust collector such as an exhaust blower. Although the inside of the cover was sucked to prevent the scattering of nuclear fuel powder, the dustproof cover became abnormally large and nuclear fuel powder adhered to the entire molding machine, especially to the drive unit, which was troublesome for cleaning and, in addition, required parts. There is a problem that maintenance and management such as replacement of the components are troublesome and production efficiency is poor. Accordingly, the present invention has been made to solve the problems of the conventional rotary molding machine for producing nuclear fuel pellets. To provide a device for preventing powder scattering of a rotary molding machine for producing nuclear fuel pellets for the purpose of improving production efficiency by simplifying parts replacement, maintenance and management of the rotary molding machine together with ease of cleaning. Is what you do. The structure of the present invention for achieving the above object will be described with reference to the reference numerals used in the description of the embodiments. Under the surface of the table 3 to be
The upper punch 6 and the lower punch 7 are provided above and below each of the dies 5 so as to move in the circumferential direction together with the circumferential movement of the dies, and move up and down toward the dies. Drive units 9, 10, and 11 for driving the lower punches 7 are respectively provided, a nuclear fuel powder is supplied onto the table 3, and a scraping step A is performed to scrape into the respective dies 5 below the table surface. 6, a pre-compression step B for pre-pressurizing the nuclear fuel powder in the mortar 5;
Molding step C in which the material is further pressed to form nuclear fuel pellets X
And a mounting step D for mounting the molded nuclear fuel pellet X on the table, and an unloading step E for removing the molded nuclear fuel pellet X from the table 3 to the rotary molding machine 1 for producing nuclear fuel pellets. In the above, the scraping step A, the pre-compression step B, the molding step C, the placing step D, and the table 3
The structure is provided with a powder scattering prevention device 12 including a receiving mechanism G for receiving the remaining nuclear fuel powder and a suction mechanism H for sucking and removing the nuclear fuel powder. An embodiment of the present invention will be described below with reference to the drawings. 1 to FIG. 4 are views showing one embodiment of the present invention, FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a schematic explanation showing a table surface of the present invention. FIG. 3 is a schematic longitudinal sectional view showing the powder scattering prevention structure of the present invention, and FIG. 4 is an operation schematic diagram of the upper punch and the lower punch of the present invention. A rotary molding machine 1 for producing nuclear fuel pellets is provided in a glove box 8 and has a rotary table 3 for molding the supplied nuclear fuel powder into pellets, and a plurality of dies 5 below the table surface. 5, upper punches 6, 6 and lower punches 7, 7, which move up and down in the dies 5, 5, a table driving unit 9 for driving the table 3, and drive the upper punch 6, lower punch 7. Drive unit 10 for upper punch, drive unit 11 for lower punch, and table 3
And a powder scattering prevention device 12 for suctioning nuclear fuel powder remaining in the vicinity. 13 is a main shaft for rotating the table. The rotary molding machine 1 sequentially sweeps and collects the nuclear fuel powder sent from the raw material supply port 2 into a plurality of feeds 4 and 4 on the rotary table 3 and further a plurality of dies 5 and 5 below the table. Are sequentially scraped into the inside (scraping step A). During the process A, the nuclear fuel powder remains on the table 3 surface. Next, the nuclear fuel powder in the mill 5 is pressed by the upper punch 6 and the lower punch 7 moving up and down in each mill 5 (preliminary compression step B), and then the upper punch 6 in the mill 5 is further pressed. It descends and is solidified in the mortar 5 to form a nuclear fuel pellet X (molding step C). When the upper punch 6 in the middle of the steps B and C descends into the mortar 5, the remaining nuclear fuel powder rolls up, and the remaining nuclear fuel powder falls from the gap between the lower punch 5 and the inside of the mortar 5. Become. Further, the nuclear fuel pellet X molded by raising the upper punch 6 from the inside of the mill 5 and pushing up the lower punch 7 in the mill 5.
Is placed on the table surface (mounting step D), moves in the circumferential direction together with the rotating table, and is taken out while being sucked from the product take-out chute 15 along the product take-out damper 14 (take-out step E). The nuclear fuel powder remaining on the table during the process of the rotary molding machine 1 is scattered by centrifugal force, and vortex is generated by the mortar 5 moving with the table, the upper punch 6 and the lower punch 7 moving up and down, and scattered around the table. Will be done. As shown in FIG. 4, the upper punch 6 and the lower punch 7, which move in the circumferential direction together with the table 3 and move in the vertical direction, pass through the operation trajectory periodically along each process as shown in FIG. First, the nuclear fuel powder is supplied to the surface of the table 3 and the mortar 5
The upper punch 6 is stored in the ascending area F, which is elevated above the dies 5, and the lower punch 7 is in the dies 5 before the pre-compression step B. Next, in the pre-compression step B, the upper punch 6 enters the mill 5 along the small roll 16 for the upper punch, and the lower punch 7 remains in the mill 5 along the small roll 17 for the lower punch. It is pre-compressed by the upper punch 6 and the lower punch 7 in the mortar 5. Further, in the molding step C, the upper punch 6 further descends into the die 5 along the large roll 18 for the upper punch, and the lower punch 7 slightly moves in the die 5 along the large roll 19 for the lower punch. And the nuclear fuel powder in the mortar 5 is formed into nuclear fuel pellets X. Next, in the mounting step D, after the upper punch 6 in the mortar 5 is raised, the lower punch 7 in the mortar is raised upward in the mortar, and the nuclear fuel pellet X in the mortar is mounted on the table 3. In the unloading step E, the upper punch 6 remains elevated above the die 5, while the lower punch 7 remains in the die. This operation locus is sequentially repeated. Powder scattering prevention device 1 for sucking nuclear fuel powder remaining on each step and table of rotary molding machine 1
2 is a receiving mechanism G for receiving nuclear fuel powder remaining in each step.
And a suction mechanism H for sucking the nuclear fuel powder to prevent scattering. The receiving mechanism G of the powder scatter prevention device 12 includes a powder scraper 20 disposed on the outer periphery of the table to prevent the remaining nuclear fuel powder on the table 3 from jumping out of the table due to centrifugal force generated by the rotation of the table. A lower powder receiving tray 21 is provided for receiving nuclear fuel powder dropped from a gap between the mortar 5 and the lower punch 7. The powder scraper 20 has a felt 22 fitted on the bottom surface. While the powder scraper 20 is fixed on the table by taking up and down free brackets on the stand frames on both sides of the rotary molding machine 1, the felt 22 is pressed against the table surface by the weight of the powder scraper, and the nuclear fuel on the table surface is pressed. The powder is wiped inside the table. The lower powder tray 21 rotates simultaneously with the table surface and is formed in a disk shape at the lower part of the table. In the suction mechanism H of the powder scattering prevention device 12, suction nozzles 24, 24 connected to the dust collecting device 23 are arranged at predetermined positions in each step of scattering nuclear fuel powder. First, the suction nozzle 24 installed on the table in the scraping step A of the rotary molding machine is wound up when the nuclear fuel powder is swept and collected in the feedstock 4 and sucks this powder to collect the dust in the dust collecting device 23.
Sent to Next, in the pre-compression step B and the molding step C, the suction nozzle 24 installed inside the powder-adhering scraper 20 on the table surface sucks the powder that is wound up when the upper punch 6 presses into the die. The suction nozzle 24 installed on the upper surface of the powder receiving tray 21 sucks the powder accumulated in the lower powder receiving tray, and the suction nozzle 24 installed inside the powder collecting scraper 20 on the table surface in the mounting step D has the upper punch 6 in the die. The powder that is rolled up as it ascends is sucked and connected to the dust collector 23, respectively. Reference numeral 24 denotes a powder scraper 20 on the table.
Is sucked and sucked when the powder has passed through, and is connected to the same dust collector 23.
In addition, by sucking the product take-out chute 15 in the take-out step E, the atmospheric air on the table flowing simultaneously with the take-out of the nuclear fuel pellets X is sucked to prevent the powder from scattering. Reference numeral 25 denotes a seal packing at the insertion port of the suction nozzle 24, 26 denotes a dust seal for the upper punch driving unit, and 27 denotes a dust seal for the lower punch driving unit. Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, but has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object of the present invention and can be appropriately modified and implemented within a range having the following effects. As is apparent from the above description, the powder scattering prevention device of the rotary molding machine for producing nuclear fuel pellets according to the present invention is provided in the surface of a rotating table in a glove box. A plurality of dies are provided in the circumferential direction below, and an upper punch and a lower punch are provided above and below each of the dies, which move in the circumferential direction together with the circumferential movement of the dies, and move up and down toward the dies, and a table and an upper punch. A drive unit for driving the punch and the lower punch is provided, and nuclear fuel powder is supplied on the table.
A scraping step of scraping into the inside, a pre-compression step of pre-pressing the nuclear fuel powder in the die with a lower punch and an upper punch, a molding step of further pressing the upper punch in the die to form a nuclear fuel pellet, and molding. In the rotary molding machine for manufacturing nuclear fuel pellets, comprising a mounting step of mounting the nuclear fuel pellets on a table, and an unloading step of taking out the molded nuclear fuel pellets from the table, Compression process, molding process,
Since the powder scattering prevention device is provided with a receiving mechanism for receiving the nuclear fuel powder remaining on the mounting step and the table and a suction mechanism for sucking and removing the nuclear fuel powder, the nuclear fuel of the rotary molding machine is provided. It is possible to expect a remarkable effect of improving the production efficiency by facilitating the cleaning, facilitating the cleaning, and also simplifying the parts replacement, maintenance and management of the rotary molding machine by reducing the scattering and adhering portions of the powder. It was.
【図面の簡単な説明】
【図１】本発明の１実施例を示す正面図。
【図２】本発明の１実施例のテーブル面上を示す概略説
明図。
【図３】本発明の１実施例の粉末飛散防止構造を示す概
略縦断面図。
【図４】本発明の１実施例の上杵、下杵の操作概略図。
【符号の説明】
１ 回転式成型機
２ 原料供給口
３ テーブル
４，４ フイードシュ
５，５ 臼
６，６ 上杵
７，７ 下杵
８ グローブボックス
９ テーブル用駆動部
１０ 上杵用駆動部
１１ 下杵用駆動部
１２ 粉末飛散防止装置
１３ メインシャフト
１４ 製品取出しダンパ
１５ 製品取出しシュート
１６ 上杵用小ロール
１７ 下杵用小ロール
１８ 上杵用大ロール
１９ 下杵用大ロール
２０ 粉末寄せスクレパ
２１ 下部粉末受け皿
２２ フエルト
２３ 集塵装置
２４ 吸引ノズル
２５ 吸引ノズル差込み口シールパッキン
２６ 上杵駆動部用ダストシール
２７ 下杵駆動部用ダストシール
Ａ 掻込工程
Ｂ 予備圧縮工程
Ｃ 成型工程
Ｄ 載置工程
Ｅ 取出工程
Ｆ 上昇区域
Ｇ 受け機構
Ｘ 核燃料ペレット
Ｈ 吸引機構BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing one embodiment of the present invention. FIG. 2 is a schematic explanatory view showing a table surface according to one embodiment of the present invention. FIG. 3 is a schematic longitudinal sectional view showing a powder scattering prevention structure according to one embodiment of the present invention. FIG. 4 is an operation schematic diagram of an upper punch and a lower punch according to one embodiment of the present invention. [Description of Signs] 1 Rotary molding machine 2 Raw material supply port 3 Table 4, 4 Feedsh 5, 5 Die 6, 6 Upper punch 7, 7 Lower punch 8 Glove box 9 Table drive unit 10 Upper punch drive unit 11 Lower Punch drive unit 12 Powder scattering prevention device 13 Main shaft 14 Product take-out damper 15 Product take-out chute 16 Small roll for upper punch 17 Small roll for lower punch 18 Large roll for upper punch 19 Large roll for lower punch 20 Powder scraper 21 Lower part Powder tray 22 Felt 23 Dust collector 24 Suction nozzle 25 Suction nozzle insertion port seal packing 26 Dust seal for upper punch driving unit 27 Dust seal for lower punch driving unit A Scraping process B Precompression process C Molding process D Mounting process E Removal process F Ascent area G Receiving mechanism X Nuclear fuel pellet H Suction mechanism
───────────────────────────────────────────────────── フロントページの続き (72)発明者 北口 幸男 兵庫県尼崎市杭瀬寺島２丁目１番２号 木 村化工機株式会社内 (72)発明者 中須賀 誠 兵庫県尼崎市杭瀬寺島２丁目１番２号 木 村化工機株式会社内 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yukio Kitaguchi Tree 1-2-1, Kuisejijima, Amagasaki City, Hyogo Prefecture Village Kakoki Co., Ltd. (72) Inventor Makoto Nakasuka Tree 1-2-1, Kuisejijima, Amagasaki City, Hyogo Prefecture Village Kakoki Co., Ltd.
Claims (1)
するテーブル(3)の面下に周方向に複数の臼(5)，(5)を
設け、この各臼(5)の上下に臼の周方向移動と共に周方
向移動し、かつ臼内に向って上下動する上杵(6)と、下
杵(7)とを設け、テーブル(3)、上杵(6)及び下杵(7)をそ
れぞれ駆動する駆動部(9)，(10)，(11)を設け、テーブ
ル(3)上に核燃料粉末を供給し、テーブル面下の各臼(5)
内に掻き込む掻込工程(A)と、下杵(7)、上杵(6)にて臼
(5)内の核燃料粉末を予備加圧する予備圧縮工程(B)と、
臼(5)内の上杵(6)を更に押圧して核燃料ペレット(X)に
成型する成型工程(C)と、成型された核燃料ペレット(X)
をテーブル上に載置する載置工程(D)と、成型された核
燃料ペレット(X)をテーブル(3)上より取り出す取出工程
(E)とを備えた核燃料ペレット製造用回転式成型機(1)に
於いて、上記掻込工程(A)、予備圧縮工程(B)、成型工程
(C)、載置工程(D)及びテーブル(3)上の残存する核燃料
粉末を受ける受け機構(G)と、この核燃料粉末を吸引除
去する吸引機構(H)とを備えた粉末飛散防止装置(12)を
設けたことを特徴とする核燃料ペレット製造用回転式成
型機の粉末飛散防止装置。Claims: 1. A plurality of dies (5) are provided in a glove box (8) in a circumferential direction below a surface of a rotating table (3). The upper punch (6), which moves in the circumferential direction along with the circumferential movement of the mortar above and below the mortar, and moves up and down into the mortar, and a lower punch (7) are provided, a table (3), an upper punch ( 6) and driving units (9), (10), (11) for driving the lower punch (7) are respectively provided, and the nuclear fuel powder is supplied on the table (3).
In the scraping process (A), the lower punch (7) and upper punch (6)
(5) a pre-compression step (B) of pre-pressurizing the nuclear fuel powder in,
A molding step (C) of further pressing the upper punch (6) in the mortar (5) to form a nuclear fuel pellet (X), and a formed nuclear fuel pellet (X)
(D), which takes the molded nuclear fuel pellets (X) out of the table (3).
(E) and a rotary molding machine (1) for producing nuclear fuel pellets, wherein the scraping step (A), the preliminary compression step (B), and the molding step
(C), a powder scattering prevention device including a receiving mechanism (G) for receiving the remaining nuclear fuel powder on the mounting step (D) and the table (3), and a suction mechanism (H) for suctioning and removing the nuclear fuel powder. A powder scattering prevention device for a rotary molding machine for producing nuclear fuel pellets, characterized in that (12) is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001306045A JP2003107189A (en) | 2001-10-02 | 2001-10-02 | Powder scattering preventing device of rotary molding machine for manufacturing nuclear fuel pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001306045A JP2003107189A (en) | 2001-10-02 | 2001-10-02 | Powder scattering preventing device of rotary molding machine for manufacturing nuclear fuel pellet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003107189A true JP2003107189A (en) | 2003-04-09 |
Family
ID=19125745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001306045A Pending JP2003107189A (en) | 2001-10-02 | 2001-10-02 | Powder scattering preventing device of rotary molding machine for manufacturing nuclear fuel pellet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003107189A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381356B2 (en) | 2003-10-02 | 2008-06-03 | Kikusui Seisakusho, Ltd. | Rotary powder compression molding machine |
| KR101588614B1 (en) * | 2014-12-16 | 2016-01-26 | 이용학 | Forming apparatus of pellets |
| KR101961838B1 (en) * | 2018-05-04 | 2019-07-18 | 한전원자력연료 주식회사 | A dust leak prevention system of nuclear fuel pellet production line |
| CN110654056A (en) * | 2019-09-25 | 2020-01-07 | 黎泽辉 | Be used for pharmaceutic powder recovery unit |
-
2001
- 2001-10-02 JP JP2001306045A patent/JP2003107189A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381356B2 (en) | 2003-10-02 | 2008-06-03 | Kikusui Seisakusho, Ltd. | Rotary powder compression molding machine |
| KR101588614B1 (en) * | 2014-12-16 | 2016-01-26 | 이용학 | Forming apparatus of pellets |
| KR101961838B1 (en) * | 2018-05-04 | 2019-07-18 | 한전원자력연료 주식회사 | A dust leak prevention system of nuclear fuel pellet production line |
| CN110654056A (en) * | 2019-09-25 | 2020-01-07 | 黎泽辉 | Be used for pharmaceutic powder recovery unit |
| CN110654056B (en) * | 2019-09-25 | 2022-01-18 | 吉林省北芪科技制药有限公司 | Be used for pharmaceutic powder recovery unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104259118B (en) | Flat effervescent tablet screening dust collection device | |
| CN216026157U (en) | Automatic change branch sieve structure of rice classifying screen | |
| CN208343542U (en) | A kind of aluminium slag ball separator | |
| JP2003107189A (en) | Powder scattering preventing device of rotary molding machine for manufacturing nuclear fuel pellet | |
| CN113232197A (en) | Plastic product crushing and cleaning device | |
| CN209756185U (en) | Medicinal material processing tablet press | |
| CN204159575U (en) | A kind of flush system effervescent tablet sieve dust arrester | |
| CN216631185U (en) | Living beings granule raw materials screening installation | |
| CN214865288U (en) | High-efficient dust collector is used in organic chemical fertilizer production | |
| CN211358992U (en) | Evaporate waste recovery device who presses aerated concrete block | |
| CN204159613U (en) | A kind of novel effervescent tablet sieve dust arrester | |
| CN204159612U (en) | A kind of can the effervescent tablet sieve device of effective dedusting | |
| CN214726746U (en) | Tablet press for pharmacy with dustproof shock attenuation | |
| CN218796193U (en) | Copper extraction equipment for recycling waste circuit boards | |
| CN108786999B (en) | Straw crushing mechanism | |
| CN219769214U (en) | Tablet press cleaning device | |
| CN220906123U (en) | Material transfer device | |
| CN205272662U (en) | Rotary tablet press | |
| CN212045511U (en) | Sealed plastic machine for processing plastic floor | |
| CN217995914U (en) | Feeding and discharging conveying mechanism | |
| CN220514721U (en) | Western medicine tablet dust removal mechanism | |
| CN219669243U (en) | Spiral chip removal equipment convenient to solid-liquid separation | |
| CN220900511U (en) | Regeneration aggregate stripping and crushing device for water permeable bricks | |
| CN217346894U (en) | A unloader for tablet production | |
| CN215681223U (en) | Four-side paint removing and tin soldering integrated machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040727 |