JP3361901B2 - Honeycomb cut surface cleaning device - Google Patents
Honeycomb cut surface cleaning deviceInfo
- Publication number
- JP3361901B2 JP3361901B2 JP26006794A JP26006794A JP3361901B2 JP 3361901 B2 JP3361901 B2 JP 3361901B2 JP 26006794 A JP26006794 A JP 26006794A JP 26006794 A JP26006794 A JP 26006794A JP 3361901 B2 JP3361901 B2 JP 3361901B2
- Authority
- JP
- Japan
- Prior art keywords
- cut surface
- honeycomb
- formed body
- honeycomb formed
- brush
- 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.)
- Expired - Fee Related
Links
- 238000004140 cleaning Methods 0.000 title claims description 22
- 239000007921 spray Substances 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims 1
- 239000003054 catalyst Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Catalysts (AREA)
- Cleaning In General (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、ハニカム成形体を所定
寸法に切断する際に付着した切粉や切片を除去するハニ
カム断面の清掃装置に関するものである。
【０００２】
【従来の技術】ハニカム（蜂の巣）成形体は、貫通孔を
多数有し、かつ、その構成材料の材質から焼成による焼
結が進まず多孔質のため、その比表面積が大きい。この
ため、このハニカム成形体は、排ガス中の窒素酸化物の
除去や排ガス中の臭いの除去などの排ガス浄化や、また
は、排ガス成分中の残存燃焼ガスの再利用など、ガス中
の化学反応を促進するための触媒や、燃焼促進用触媒の
担持体として、多方面で使用されている。
【０００３】このようなハニカム触媒の多くは、ハニカ
ム状の口金から粘土状の坏土を押し出して製作されてい
る。すなわち、一般的には、図３に示すように、まず、
原料の混練を行なった後、スクリュー式押出機などで口
金から成形体を押し出し、その直後に、ハニカムの形状
を崩さないように一定寸法に切断する。さらに、これを
乾燥機に入れて充分に乾燥させた後に、薄い円板状のダ
イヤモンドカッタやダイヤモンドソーなどで所定の寸法
に切断し、切断面の清掃を行なった後に焼成し、完成さ
せる。
【０００４】一方、燃焼排ガス中の窒素酸化物の触媒や
燃焼促進用触媒の担持体としては、一辺の寸法が数１０
ｃｍ程度の正方形、あるいは長方形のものが必要であ
り、このために、一辺が１５ｃｍ程度の寸法をもつ触媒
を多数、平行に積み並べてブロック組込みをして、使用
するのが普通である。
【０００５】
【発明が解決しようとする課題】上記のように、乾燥さ
せたハニカム成形体をダイヤモンドソーなどで切断する
が、このとき乾燥が充分でない場合には、切断時の切粉
や切片、あるいはハニカム担持体物質などが、ハニカム
切断面に付着する。このため、切断面は、人手により、
真空掃除機などを用いて注意深く清掃されている。ま
た、ハニカム成形体の乾燥後の強度は、一般的には余り
強くなく、したがって、清掃時のハンドリングには注意
が必要であった。
【０００６】また、ハニカム成形体を大形形状にすると
全体重量が増大するので、ハンドリングや清掃作業など
に人手に頼るところが多くなり、かえって、能率が悪く
なっていた。
【０００７】本発明は、このような課題を解決するため
になされたもので、ハニカム成形体の切断端面の清掃作
業を自動的に行なえるようにし、工数の低減とハンドリ
ングによる製品の欠損を防止できるハニカム切断面の清
掃装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】この目的を達成するため
に、本発明においては、ハニカム成形体の長手方向の切
断面に対して平行に、上下動が可能な機構を有するブラ
シ付スプレイノズルを設け、その切断面の反対側には局
所排出集塵ホッパを設け、また、ハニカム成形体を載せ
るテーブルを１８０度方向転換ができるテーブル台車で
構成したハニカム切断面の清掃装置により、上記ブラシ
付スプレイノズルを上下動させてブラシで切断面に付着
している切粉や切片を浮かせ、さらに、これらをスプレ
イノズルからエアスプレイすることにより、上記ハニカ
ム成形体の切断面を自動的に清掃する。
【０００９】
【作用】このハニカム切断面の清掃装置においては、切
断面に平行に、かつ、上下移動が可能なようにブラシ付
スプレイノズルが設置されているので、そのブラシ付ス
プレイノズルをハニカム切断面に沿って上下に移動させ
ることにより、そのブラシの接触によって切断面の隅々
に付着していた切粉や切片が浮かされ、さらに、スプレ
イノズルから吹き出すエアによって飛ばされ、ハニカム
成形体の貫通孔を通って、対面にある集塵ホッパに吸引
される。こうして、切断面に付着した切粉や切片は簡単
に除去される。また、この集塵ホッパは集塵機に直結さ
れており、したがって、切粉や切片は外部に飛散するこ
となく回収されるので、作業環境の悪化は防止できる。
【００１０】また、ハニカム成形体は、１８０度方向転
換が可能なテーブルに載せられているので、ハニカム成
形体の一面の切断面の清掃作業が完了した後は、テーブ
ルを１８０度回転させることにより、反対側の切断面
も、同様に清掃される。
【００１１】この一連の機構動作により、ハニカム切断
面の清掃作業は、人力によらずに、自動的に実施され
る。
【００１２】
【実施例】ハニカム成形体は、例えば、アルミナ原料、
ガラス繊維、滑石、カオリン、グリセリンなどの材料に
有機バインダと水を加えて、ニーダでよく混練し、図３
に示すように、押出し成形機で口金を通して押出し成形
し、乾燥後に所定の寸法に切断し、その後、切断面の清
掃を行ない、さらに、焼成して、用途別に製品として組
込まれる。ここで、本発明は、上記のハニカム成形体の
切断面の清掃装置に関するものである。以下、本発明に
係るハニカム切断面の清掃装置について、図面を用いて
詳細に説明する。
【００１３】まず、図１は、本発明に係るハニカム切断
面の清掃装置の一実施例の正面図、図２は、その平面図
である。
【００１４】本装置において、ブラシ８付きのスプレイ
ノズル２は、タイトシリンダ６に取り付けられ、そのタ
イトシリンダ６は、架台１に固定されている。また、集
塵ホッパ１１はスプレイノズル２と同一線上に配置さ
れ、やはり、架台１に固定されている。そして、ハニカ
ム成形体９を載せるテーブル１０は、テーブルを水平方
向に１８０度回転させるロータリアクチェータ４を介し
て、走行台車３に取り付けられている。また、走行台車
３は、架台１上に、ロッドレスシリンダ５と案内ガイド
レール７を介して連結されている。
【００１５】このような構成において、テーブル１０上
にハニカム成形体９を載せ、スイッチを入れると、走行
台車３がロッドレスシリンダ５によって移動し、ブラシ
８付きのスプレイノズル２と集塵ホッパ１１との間に停
止し、固定される。ここで、集塵ホッパ１１は、連結さ
れている集塵機により、あらかじめ吸引状態にしてお
く。
【００１６】次に、走行台車３の停止信号により、ブラ
シ８付きのスプレイノズル２からエアを連続的に吹き付
けると共に、タイトシリンダ６により、ハニカム成形体
９の切断面の高さをカバーするストロークで、ブラシ８
付きのスプレイノズル２が上下に移動する。そして、ブ
ラシ８は、ハニカム成形体９の切断面を上下になぜなが
ら、ハニカムセルの隅々に付着した切粉や切片を浮か
せ、これにスプレイノズル２から吹き出すエアを吹きつ
け、集塵ホッパに向けて吹き飛ばす。
【００１７】このように吹き飛ばされた切粉と切片は、
ハニカム成形体９の複数の貫通孔を通過し、吸引状態に
ある集塵ホッパ１１に吸引され、さらに集塵機に捕収さ
れる。このため、切粉や切片の外部への飛散がなく、作
業環境の悪化は防止されている。
【００１８】また、ブラシ８付きのスプレイノズル２の
上下移動回数は、ほぼ３〜４回で充分に清掃される。
【００１９】次に、片面の切断面の清掃が完了すると、
同位置で、ハニカム成形体９を載せたテーブル１０を、
走行台車３の上でロータリアクチェータ４により１８０
度回転させ、反対側の未清掃の切断面をスプレイノズル
２に対向させる。これにより、前述と同様の手段で、他
面の清掃が行なわれる。こうして、作業が完了すると、
走行台車３がロッドレスシリンダ５によって元の位置に
戻され、清掃されたハニカム成形体は、テーブル１０か
ら下ろされる。
【００２０】こうして、ハニカム成形体の切断面は、人
力に頼ることなく、本発明に係る清掃装置によって、自
動的に清掃される。
【００２１】
【発明の効果】以上説明したように、本発明に係るハニ
カム切断面の清掃装置においては、ハニカム切断面に対
向するブラシ付スプレイノズルで切断面表面を走査して
清掃するため、清掃作業を自動的に行なうことができ、
工数の低減とハンドリングによる製品の欠損が防止でき
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a honeycomb cross section for removing chips and chips adhered when cutting a honeycomb formed body to a predetermined size. . 2. Description of the Related Art A honeycomb (honeycomb) formed body has a large specific surface area because it has a large number of through holes and is porous since sintering by sintering does not proceed from the material of its constituent material. For this reason, this honeycomb formed body performs chemical reactions in gas, such as purification of exhaust gas such as removal of nitrogen oxides in exhaust gas and removal of odor in exhaust gas, or reuse of residual combustion gas in exhaust gas components. It is used in various fields as a catalyst for accelerating and as a carrier of a catalyst for accelerating combustion. [0003] Many of such honeycomb catalysts are manufactured by extruding clay-like clay from a honeycomb-like die. That is, generally, as shown in FIG.
After kneading the raw materials, the formed body is extruded from a die with a screw extruder or the like, and immediately thereafter, cut into a certain size so as not to lose the shape of the honeycomb. Furthermore, after putting it in a dryer and drying it sufficiently, it is cut into a predetermined size with a thin disk-shaped diamond cutter or diamond saw, and the cut surface is cleaned and baked to complete. On the other hand, as a carrier for a catalyst for nitrogen oxides in combustion exhaust gas or a catalyst for promoting combustion, the size of one side is several tens.
A square or rectangular shape of about cm is required. For this purpose, a large number of catalysts each having a size of about 15 cm on a side are usually stacked and arranged in a block and used. [0005] As described above, the dried honeycomb formed body is cut by a diamond saw or the like. If the dried honeycomb formed body is not sufficiently dried at this time, chips, pieces, Alternatively, a honeycomb carrier material or the like adheres to the cut honeycomb surface. For this reason, the cut surface is
It is carefully cleaned using a vacuum cleaner. Further, the strength of the honeycomb formed body after drying is generally not so high, and therefore, care must be taken in handling during cleaning. Further, when the honeycomb formed body is made to have a large size, the overall weight increases, so that the handling and the cleaning work have to be performed by hand, and the efficiency is rather deteriorated. SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and enables a cleaning operation of a cut end face of a honeycomb formed body to be automatically performed, thereby reducing man-hours and preventing product loss due to handling. An object of the present invention is to provide a cleaning device for a honeycomb cut surface that can be used. In order to achieve this object, the present invention provides a brush-equipped mechanism having a mechanism capable of moving up and down in parallel to a longitudinal section of a honeycomb formed body. A spray nozzle is provided, a local discharge dust collecting hopper is provided on the opposite side of the cut surface, and the cleaning device for the honeycomb cut surface configured by a table carriage capable of turning the table on which the honeycomb formed body is mounted can be turned by 180 degrees. The cutting surface of the honeycomb formed body is automatically cleaned by moving the spray nozzle with a brush up and down to float chips and pieces adhered to the cutting surface with a brush, and then air-spraying these from the spray nozzle. I do. In the apparatus for cleaning a honeycomb cut surface, a spray nozzle with a brush is installed in parallel with the cut surface and so as to be movable up and down. By moving the brush up and down along the surface, the swarf and the pieces adhering to the corners of the cut surface are floated by the contact of the brush, and are further blown off by the air blown out from the spray nozzle, and the through hole of the honeycomb formed body Is sucked into the dust collecting hopper on the opposite side. Thus, the chips and pieces attached to the cut surface are easily removed. Further, the dust collecting hopper is directly connected to the dust collecting machine, so that the chips and the pieces are collected without scattering to the outside, so that the working environment can be prevented from deteriorating. Further, since the honeycomb formed body is placed on a table capable of changing its direction by 180 degrees, after the cleaning operation of one cut surface of the honeycomb formed body is completed, the table is rotated by 180 degrees. , And the other cut surface is similarly cleaned. [0011] By this series of operation of the mechanism, the cleaning work of the honeycomb cut surface is automatically performed without human power. [0012] The honeycomb formed body is, for example, an alumina raw material,
Add an organic binder and water to materials such as glass fiber, talc, kaolin, and glycerin, and knead well with a kneader.
As shown in (1), the product is extruded through a die with an extruder, cut to a predetermined size after drying, then the cut surface is cleaned, fired, and incorporated as a product for each application. Here, the present invention relates to a device for cleaning a cut surface of the above-mentioned honeycomb formed body. Hereinafter, a honeycomb cut surface cleaning apparatus according to the present invention will be described in detail with reference to the drawings. First, FIG. 1 is a front view of an embodiment of a honeycomb cut surface cleaning apparatus according to the present invention, and FIG. 2 is a plan view thereof. In the present apparatus, the spray nozzle 2 with the brush 8 is attached to a tight cylinder 6, and the tight cylinder 6 is fixed to the gantry 1. The dust collection hopper 11 is arranged on the same line as the spray nozzle 2 and is also fixed to the gantry 1. The table 10 on which the honeycomb formed body 9 is placed is attached to the traveling vehicle 3 via a rotary chopper 4 that rotates the table 180 degrees in the horizontal direction. The traveling carriage 3 is connected to the gantry 1 via a rodless cylinder 5 and a guide guide rail 7. In this configuration, when the honeycomb formed body 9 is placed on the table 10 and the switch is turned on, the traveling carriage 3 is moved by the rodless cylinder 5, and the spray nozzle 2 with the brush 8 and the dust collection hopper 11 Stopped during and fixed. Here, the dust collection hopper 11 is previously set in a suction state by a connected dust collector. Next, in response to a stop signal of the traveling vehicle 3, air is continuously blown from the spray nozzle 2 with the brush 8, and the tight cylinder 6 is used for a stroke covering the height of the cut surface of the honeycomb formed body 9. , Brush 8
The spray nozzle 2 moves up and down. Then, the brush 8 floats the chips and pieces adhered to the corners of the honeycomb cell while blowing the cut surface of the honeycomb formed body 9 up and down, and blows air blown out from the spray nozzle 2 to the dust collection hopper. Blow away. The chips and pieces blown off in this way are:
The dust passes through the plurality of through holes of the honeycomb formed body 9, is sucked by the dust collection hopper 11 in a suction state, and is further collected by the dust collector. For this reason, there is no scattering of chips and pieces to the outside, and deterioration of the working environment is prevented. The number of vertical movements of the spray nozzle 2 with the brush 8 is about 3 to 4 times, so that the cleaning is sufficiently performed. Next, when cleaning of one cut surface is completed,
At the same position, the table 10 on which the honeycomb formed body 9 is placed is
180 on the traveling trolley 3 by the rotary chopper 4
The spray nozzle 2 is rotated by an angle so that the uncleaned cut surface on the opposite side faces the spray nozzle 2. Thus, the other surface is cleaned by the same means as described above. Thus, when the work is completed,
The traveling cart 3 is returned to the original position by the rodless cylinder 5, and the cleaned honeycomb formed body is lowered from the table 10. Thus, the cut surface of the formed honeycomb body is automatically cleaned by the cleaning device according to the present invention without relying on human power. As described above, in the apparatus for cleaning a honeycomb cut surface according to the present invention, the cleaning is performed by scanning the surface of the cut surface with a spray nozzle with a brush opposed to the cut surface of the honeycomb. Work can be done automatically,
It can reduce man-hours and prevent product loss due to handling.
【図面の簡単な説明】
【図１】本発明に係るハニカム切断面の清掃装置の一実
施例の正面図である。
【図２】図１の装置の平面図である。
【図３】ハニカム成形体の押出成形工程の説明図であ
る。
【符号の説明】
１…架台 ２…スプレイノズル
３…走行台車 ４…ロータリアクチェ
ータ
５…ロッドレスシリンダ ６…タイトシリンダ
７…案内ガイドレール ８…ブラシ
９…ハニカム成形体 １０…テーブル
１１…集塵ホッパBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an embodiment of a cleaning device for a honeycomb cut surface according to the present invention. FIG. 2 is a plan view of the apparatus of FIG. FIG. 3 is an explanatory diagram of an extrusion forming step of a honeycomb formed body. [Description of Signs] 1 ... Base 2 ... Spray Nozzle 3 ... Truck Carriage 4 ... Rotary Chopper 5 ... Rodless Cylinder 6 ... Tight Cylinder 7 ... Guide Guide Rail 8 ... Brush 9 ... Honeycomb Formed Body 10 ... Table 11 ... Dust Collection Hopper
フロントページの続き (56)参考文献 特開 平４−22601（ＪＰ，Ａ) 実開 昭63−28188（ＪＰ，Ｕ) 実開 昭59−106615（ＪＰ，Ｕ) 実開 昭60−94442（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B08B 5/02 B08B 5/04 B08B 5/00 B01D 53/86 B01J 35/04 301 B28B 11/16 Continuation of the front page (56) References JP-A-4-22601 (JP, A) JP-A 63-28188 (JP, U) JP-A 59-106615 (JP, U) JP-A 60-94442 (JP , U) (58) Fields investigated (Int. Cl. 7 , DB name) B08B 5/02 B08B 5/04 B08B 5/00 B01D 53/86 B01J 35/04 301 B28B 11/16
Claims (1)
状の成形体を乾燥または焼成後に所定の寸法に切断した
後に、その切断面や貫通孔内に付着した切粉や切片を清
掃するハニカム切断面の清掃装置において、上記ハニカ
ム成形体の長手方向切断面に対向して平行に配置され、
かつ、該切断面に平行に上下動が可能な機構を有するブ
ラシ付スプレイノズルを設け、上記切断面の反対側には
局所排出集塵ホッパを取り付け、また、上記ハニカム成
形体を載せるテーブルを１８０度方向転換が可能なテー
ブル台車で構成し、上記ブラシ付スプレイノズルを上下
動させて上記ブラシで上記切断端面に付着している切粉
や切片を浮かせると共に上記スプレイノズルからエアス
プレイすることにより、上記ハニカム成形体の切断面を
清掃することを特徴とするハニカム切断面の清掃装置。(57) [Claim 1] A porous honeycomb formed body having a plurality of through holes is cut into a predetermined size after drying or firing, and then adheres to the cut surface or the inside of the through hole. In the cleaning device of the honeycomb cut surface for cleaning the swarf and the pieces, the honeycomb formed body is disposed in parallel to the cut surface in the longitudinal direction of the honeycomb formed body,
Further, a spray nozzle with a brush having a mechanism capable of moving up and down in parallel with the cut surface is provided, a local discharge dust collecting hopper is mounted on the opposite side of the cut surface, and a table on which the honeycomb formed body is placed is provided. By making a table carriage capable of changing the degree direction, by moving the spray nozzle with the brush up and down to float chips and pieces attached to the cutting end surface with the brush and air spray from the spray nozzle, A cleaning device for a cut honeycomb surface, which cleans a cut surface of the honeycomb formed body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26006794A JP3361901B2 (en) | 1994-10-25 | 1994-10-25 | Honeycomb cut surface cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26006794A JP3361901B2 (en) | 1994-10-25 | 1994-10-25 | Honeycomb cut surface cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08117713A JPH08117713A (en) | 1996-05-14 |
| JP3361901B2 true JP3361901B2 (en) | 2003-01-07 |
Family
ID=17342855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26006794A Expired - Fee Related JP3361901B2 (en) | 1994-10-25 | 1994-10-25 | Honeycomb cut surface cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3361901B2 (en) |
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| EP1875997B1 (en) * | 2006-07-07 | 2009-03-18 | Ibiden Co., Ltd. | End face processing apparatus, end face processing method for honeycomb molded body, and manufacturing method for honeycomb structure |
| WO2008047565A1 (en) | 2006-09-28 | 2008-04-24 | Hitachi Metals, Ltd. | Method and apparatus for manufacturing ceramic honeycomb structure |
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-
1994
- 1994-10-25 JP JP26006794A patent/JP3361901B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331713A (en) * | 2020-04-02 | 2020-06-26 | 南通铁建建设构件有限公司 | Method and automatic device for automatically cleaning die after tube sheet demoulding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08117713A (en) | 1996-05-14 |
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