JPS6048258B2 - mold making machine - Google Patents

Description

【発明の詳細な説明】 この発明は鋳型造型機に関する。[Detailed description of the invention] This invention relates to a mold making machine.

近時、鋳枠内へ圧縮空気によつて鋳物砂を吹込むんて充
填し、その後この充填された鋳物砂を加圧して鋳型に硬
度を付与する所謂ブロースクイズ造型法が種々開発され
ている。Recently, various so-called blow squeeze molding methods have been developed in which molding sand is blown into the flask using compressed air and then the filled molding sand is pressurized to impart hardness to the mold. .

しカルながら、この方法では鋳物砂の吹込み方向から見
て模型のかげになる部分がエアポケットになつて、この
部分に鋳物砂が十分に行きわたらず、充填密度が不足し
、均等な充填密度を有する良好な鋳型の造型が困難で、
この欠点は模型の形状が複雑な場合、特に顕著であつた
。However, with this method, the shaded part of the model when viewed from the direction of the molding sand blowing becomes an air pocket, and the molding sand is not sufficiently distributed in this part, resulting in insufficient packing density and an even filling density. It is difficult to make a good mold with
This drawback was particularly noticeable when the shape of the model was complex.

この発明は上述にかんがみて、ブロースクイズ法を採用
しつつ、しかも、複雑な形状の模型においても鋳物砂の
充填密度が均等で十分な硬度を有する良好な鋳型を造型
可能な鋳型造型機を提供することを目的とするものであ
る。In view of the above, the present invention provides a mold making machine that employs the blow squeeze method and is capable of manufacturing good molds with uniform filling density of molding sand and sufficient hardness even for models with complex shapes. The purpose is to

この発明の要旨は鋳枠内へ側面から鋳物砂を吹込んで充
填した後充填された鋳物砂の上側から下方に向かつて空
気を圧送し、この圧送空気が鋳物砂の砂粒間隙を通過し
て模型付模型板に穿設された排気孔を経て外気へ放出さ
れるように構成するものである。The gist of this invention is that after molding sand is blown into the flask from the side to fill it, air is pumped downward from above the filled molding sand, and this pressurized air passes through the gaps between the sand grains of the molding sand and molds the mold. It is configured so that it is released into the outside air through an exhaust hole drilled in the attached model board.

以下この発明の図例について説明する。Below, illustrations of this invention will be explained.

第１図において、門形フレーム１は床面に固定されたベ
ッド２と、ベッド２の左右両端付近上面にそれぞ、れ垂
設されたコラム３、３と、コラム３、３の上端を相互に
連結するビーム４とによつて形成され、ベッド２の内部
にはその上面の下側に排気室５が設けられ、排気室５に
は上面へ連通する適数個の排気孔６と下方の排気孔７ａ
へ連通する通気フ孔７ｂとが穿設され、排気孔７ａは外
気に連通している。模型台８はベッド２の上面に固定さ
れ、その下面には下部排気室９がまた、上面には台形の
上部排気室１０がそれぞれ刻設され、これら両排気室は
適数個の排気孔１１によつて連通してい５る。模型付模
型板１２は模型１３と板１３ａとからなり、板１３ａは
上部排気室１０の上端付近に嵌装され、模型１３の適宜
の位置の表面、および板１３ａの上面から上部排気室１
０へ連結する適数個の排気孔１４が穿設されている。１
５はゴム等から成形された弾性を有するシール部材で、
模型台８の上面に固着され、その内周面は板１３ａの外
周面に密着し、その上面は板１３ａよりわずかに高いよ
うに形成されている。In Fig. 1, a portal frame 1 has a bed 2 fixed to the floor, columns 3, 3, which are vertically installed on the upper surface near both left and right ends of the bed 2, and the upper ends of the columns 3, 3 are connected to each other. An exhaust chamber 5 is provided inside the bed 2 under the upper surface thereof, and the exhaust chamber 5 has an appropriate number of exhaust holes 6 communicating with the upper surface and an exhaust chamber 5 below the upper surface. Exhaust hole 7a
A ventilation hole 7b communicating with the air is provided, and an exhaust hole 7a communicates with the outside air. The model stand 8 is fixed to the upper surface of the bed 2, and a lower exhaust chamber 9 is carved in its lower surface, and a trapezoidal upper exhaust chamber 10 is carved in its upper surface, and both exhaust chambers have an appropriate number of exhaust holes 11. They are connected by 5. The model plate with model 12 consists of a model 13 and a plate 13a, and the plate 13a is fitted near the upper end of the upper exhaust chamber 10, and the upper exhaust chamber 1
A suitable number of exhaust holes 14 connected to 0 are bored. 1
5 is an elastic sealing member molded from rubber or the like;
It is fixed to the upper surface of the model stand 8, its inner circumferential surface is in close contact with the outer circumferential surface of the plate 13a, and its upper surface is formed to be slightly higher than the plate 13a.

コラム３，３にそれぞれ上下摺動可能に嵌装された案内
筒１６，１６には可動ダイブート１７の左右両端部が固
定され、可動ダイプレート１７の中央上面にはスクイズ
シリンダ１８が垂設固定され、そのピストンロッド１９
は可動ダイプレート１７を貫通して下方に垂設され、ス
クイズシリンダ１８の上端は型合わせシリンダ２０のピ
ストン２１の下端に固定され、型合わせシリンダ２０は
ビーム４の下面に固定されている。可動ダイプレート１
７の下部左右両内側面には前後方向に延設された１対の
中抜きローラコンベヤ２２，２２が固定され、このコン
ベヤに所定ピッチで固定された水平軸にはツバ付ローラ
２３，２３が軸支されている。なお、右側のローラコン
ベヤ２２は下部に延長部２２ａが延設されその外側面は
面一に形成されていて、第１図に示す状態において後述
の鋳物砂排気孔４１を塞ぐように形成されている。鋳枠
２４は上下に開口し、左右両外側面には上下に鍔が設け
られて．いて、上方の鍔２４ａ，２４ａによつてツバ付
ローラ２３，２３に支持され前後に移動可能に装設され
、模型付模型板１２に正対した状態において、その側壁
の下端面がシール部材１５に対向するように形成されて
いる。補助鋳枠２５も鋳枠２二４の開口に対応するよう
に上下方向に開口し、可動ダイプレート１７の下面に固
定され、その側壁内部には空胴２６が縦貫するように設
けられ、空胴２６と側壁内面とを連通する適数個の通気
孔２７が穿設され、右側壁の外面は右側のローラコン５
ベア２２の外側面と面一で、かつ、この外面から側壁内
面へ貫通する鋳物砂吹込孔２８が穿設され、下面には鋳
枠２４の側面上面に当接するコム等から成形された弾性
を有するシール部材２９が埋設され、上面には下端が空
胴２６に連通し上端４に弁、３１を装着した導管３０が
垂設されている。圧縮板３２はスクイズシリンダのピス
トンロッド１９の下端に固定され、補助鋳枠２５の内周
面を上下に摺動するように装設され、この摺動面には補
助鋳枠２５の内周面に密接するようなゴム等より成形さ
れた弾性を有するシール部材３３が埋設され、空胴３４
は圧縮板３２の内部を連通するように設けられ、空胴３
４と圧縮板３２の下面とを連通する適数個の通気孔３５
が穿設され、圧縮板３２の上面には空胴３４に連通する
導管３６が垂設され、導管３６の他端は可撓管３６ａを
介して２方切替弁３７に連通し、２方切替弁３７は外気
側と後述のプローイングヘツド３９内の圧縮フ空気側と
に切換可能に形成され、圧縮板３２の上面にはまたガイ
ドバー３８が垂設され、このガイドバー３８は可動ダイ
プレート１７に穿設された穴を摺動的に貫通するように
配設され、圧縮板３２の上下動移動を案内するように形
成されてい・る。プローイングヘツド３９はフレーム１
に固定され、下部には左側のローラコンベヤ２２、延長
部２２ａ及び補助鋳枠２５等の右外側面に摺接するフラ
ンジ部４０を有する鋳物砂排出孔４１が設けられ、上端
部には弁４３を有する鋳物砂供給口４２が開口し、右側
肩部には弁４４を介して図示しない圧縮空気源に連通す
る導管が連結され、左側肩部には弁４５が連結されてい
る。なお上述において、型合わせシリンダ２０は第１図
に示す状態からそのピストンロッド２１が下降して、ス
クイズシリンダ１８、を介して可動グイプレート１７を
下降させ、最初に鋳枠２４の側壁下端面がシール部材１
５に当接して停止するとともにツバ付ローラ２３が鍔２
４ａから離れ、さらに可動ダイプレート１７が下降して
、補助鋳枠２４下面のシール部材２９が鋳枠２４の側壁
上面に当接して停止するように作動し、かつ、下降停止
状態において、鋳物砂排出孔４１と鋳物砂吹込孔２８と
か連通するように構成されている。次にこの発明の鋳型
造型機の操作法及び作用を説明する。Both left and right ends of a movable die boot 17 are fixed to guide tubes 16, 16 which are vertically slidably fitted in the columns 3, 3, respectively, and a squeeze cylinder 18 is vertically fixed to the upper center surface of the movable die plate 17. , its piston rod 19
passes through the movable die plate 17 and is vertically provided below, the upper end of the squeeze cylinder 18 is fixed to the lower end of the piston 21 of the mold matching cylinder 20, and the mold matching cylinder 20 is fixed to the lower surface of the beam 4. Movable die plate 1
A pair of hollow roller conveyors 22, 22 extending in the front-rear direction are fixed to both the left and right inner surfaces of the lower part of 7, and flanged rollers 23, 23 are fixed to the horizontal shafts fixed to this conveyor at a predetermined pitch. It is pivoted. Note that the right roller conveyor 22 has an extension 22a extending at the lower part, and its outer surface is formed flush, and is formed so as to close a molding sand exhaust hole 41, which will be described later, in the state shown in FIG. There is. The flask 24 is open at the top and bottom, and flanges are provided at the top and bottom on both left and right outer surfaces. It is supported by the flanged rollers 23, 23 by the upper flanges 24a, 24a and is installed so as to be movable back and forth, and when facing the model board 12 with the model, the lower end surface of the side wall is attached to the sealing member 15. It is formed to face the The auxiliary flask 25 also has an opening in the vertical direction corresponding to the opening of the flask 224, and is fixed to the lower surface of the movable die plate 17, and a cavity 26 is provided vertically in the side wall of the mold. A suitable number of ventilation holes 27 are formed to communicate between the body 26 and the inner surface of the side wall, and the outer surface of the right wall is connected to the right roller controller 5.
A molding sand blowing hole 28 is drilled flush with the outer surface of the bear 22 and penetrating from this outer surface to the inner surface of the side wall, and an elastic molded sand molded from a comb or the like is formed on the lower surface to abut against the upper surface of the side surface of the flask 24. A seal member 29 having a sealing member 29 is embedded therein, and a conduit 30 whose lower end communicates with the cavity 26 and whose upper end 4 is equipped with a valve 31 is vertically provided. The compression plate 32 is fixed to the lower end of the piston rod 19 of the squeeze cylinder and is installed so as to slide up and down on the inner peripheral surface of the auxiliary flask 25. An elastic sealing member 33 made of rubber or the like that is in close contact with the cavity 34 is buried therein.
is provided so as to communicate with the inside of the compression plate 32, and the cavity 3
4 and the lower surface of the compression plate 32.
A conduit 36 that communicates with the cavity 34 is provided vertically on the upper surface of the compression plate 32, and the other end of the conduit 36 communicates with a two-way switching valve 37 via a flexible tube 36a. The valve 37 is formed to be switchable between the outside air side and the compressed air side in a plowing head 39 (to be described later), and a guide bar 38 is also provided vertically on the upper surface of the compression plate 32, and this guide bar 38 is connected to the movable die plate. The hole bored in the compression plate 17 is arranged so as to slide through the hole, and is formed to guide the vertical movement of the compression plate 32. The plowing head 39 is frame 1
A molding sand discharge hole 41 having a flange portion 40 in sliding contact with the right outer surface of the left roller conveyor 22, the extension portion 22a, the auxiliary flask 25, etc. is provided at the bottom, and a valve 43 is provided at the upper end. A molding sand supply port 42 is opened, a conduit communicating with a compressed air source (not shown) is connected to the right shoulder via a valve 44, and a valve 45 is connected to the left shoulder. In the above description, the piston rod 21 of the mold matching cylinder 20 is lowered from the state shown in FIG. Seal member 1
5 and stops, and the collared roller 23 touches the collar 2.
4a, the movable die plate 17 further descends, and the sealing member 29 on the lower surface of the auxiliary flask 24 comes into contact with the upper surface of the side wall of the flask 24 and stops. The discharge hole 41 and the molding sand blowing hole 28 are configured to communicate with each other. Next, the operation method and function of the mold making machine of the present invention will be explained.

第１図に示すように型合わせシリンダ２０によつて可動
グイプレート１７が上昇位置で停止した状態において、
空の鋳枠２４を中抜きローラコンベヤ２２，２２によつ
て、模型付模型板１２に正対する位置まで移動させた後
、型合わせシリンダ２０を作動させてピストンロッド２
１を下降させ、スクイズシリンダ１８を介して可動ダイ
プレート１７を案内筒１６に案内させてコラム３に沿つ
て下降させ、前述した順序で、模型台８上面のシール部
材１５には鋳枠２４の側壁下端面が、また、鋳枠２４の
側壁上端面には補助鋳枠２５の側壁下端面のシール部材
２９がそれぞれ密着した状態て型合わせされるとともに
それまでの延長部２２ａで閉鎖されていた鋳物砂排出孔
４１は鋳物砂吹込孔２８と連通する。このとき、弁４：
３，４５は閉じられ２方切替弁３７は外気側に切換えら
れ、弁３１は開かれている。この状態において弁４４を
開くと図示しない圧縮空気源よりプローイングヘツド３
９内に圧縮空気が圧送され、プローイングヘツド３９内
に供給されている鋳物，砂Ｓは空気の流速によつて鋳物
砂排出孔４１鋳物砂吹込孔２８を経て鋳枠２４、補助鋳
枠２５内へ吹き込まれる。同時に吹込まれる空気は上方
においては通気孔３５より空胴３４、導管３６、可撓管
３６ａ）２方切替弁３７を介して外気へ、側方において
は排気孔２７より空胴２６、導管３０、弁３１を介して
外気へ、下方においては排気孔１４より上部排気室１０
、排気孔１１、下部排気室９、排気孔６、排気室５、通
気孔７ｂ）排気孔７ａを介して外気へ、それぞれ放出さ
れる。鋳枠２４、補助鋳枠２５内が鋳物砂Ｓで充填され
たとき、弁３１を閉じるとともに２方切替弁３７をプロ
ーイングヘツド３９側すなわち圧縮空気側へ切替える。
すると、圧縮空気は可撓管３６ａ、導管３６、空胴３４
を介して通気孔３５から下方に向かつて圧送される。こ
の圧送された空気は充填された鋳物砂の砂粒間隙を通過
して流下し、途中充填密度の小さい部位では近傍の鋳物
砂をこの部分へその流速によつて移動させて補充し、充
填密度を均等化させ、この空気は最終的に排気孔１４よ
り外気に放出される。この場合補助鋳枠２５と圧縮板３
２、補助鋳枠２５と鋳枠２４及ひ鋳枠２４と模型台８、
模型台８と模型付模型板１２等の間にはそれぞれシール
部材３３，２９，１５等が介在していて気密が保持され
ているので通気孔３５′から噴出する圧縮空気はその勢
力を弱められることなく模型付模型板１２の表面まで達
することができる。この場合鋳物砂吹込孔２８には直接
プローイングヘツド３９よりの空気圧が作用して鈎り合
つているので、各鋳枠２４，２５内へ圧送され ιた圧
縮空気はプローイングヘツド３９内へ逆流することなく
、確実に各鋳枠２４，２５内に充填された鋳物砂中を通
過し、板１３ａ表面あるいは板１３ａに連通する排気孔
１４を穿つた模型１３表面の砂を硬化するものである。
このようにして圧縮空気を鋳物砂中を通過させて板１３
ａ及び、模型１３近辺の鋳物砂の充填密度を高めた後弁
４４を閉じるとともに弁３１，４５を開き、２方切替弁
３７を外気側へ切替えてプローイングヘツド３９内を大
気圧に戻し、次にスクイズシリンダ１８を作動させピス
トンロッド１９を下降させて圧縮板３２によつて充填さ
れた鋳物砂を押圧して圧縮板３２近辺の鋳物砂の充填密
度を高める。したがって全体として均一硬度の良好な鋳
型の造型か可能である。尚この場合、後述の離型後の鋳
型２４の入替えに際し、鋳型の上面が補助鋳枠２５の下
端及びシール部材２９と干渉しない高さになるまで押圧
する。しかる後スクイズシリンダ１８及び型合わせシリ
ンダ２０を戻り方向へ作動させる。するとまず、鋳型か
ら補助鋳枠２５が抜け、ツバ付ローラ２３が鋳枠２４の
鍔２４ａに当接するに及んで模型１３から鋳枠２４内の
鋳型が離型され始め、型合わせシリンダ２０の戻り行程
の完了によつて離型も完了し、鋳型の造型された鋳枠は
次の空の鋳枠に入替えられ、造型の１サイクルは完了す
る。なお、このサイクル中においてプローイングヘツド
３９内が大気圧の状態であるとき弁４３を開いて開口４
２から鋳物砂が供給される。さらになお、離型工程にお
いて排気孔１４から空気を逆に上方へ送るようにして離
型を容易にする構成とすることもできる。この発明によ
れば上述のように、鋳物砂を吹込んで充填した後におい
て、充填された鋳物砂の上フ部からその砂粒間隙を通過
させるように空気を圧送し、これを模型付模型板１２の
模型１３及ひ板１３ａに穿設された排気孔１４を介して
外気へ放出させるようにしたので、鋳物砂吹込みに際し
、模型１３のかげになつていて鋳物砂の充填密度が５小
さい部分にも十分に鋳物砂が補充されて充填密度が均等
化され圧縮板３２の押圧と相まつて、複雑な形状の模型
でも均等で十分な充填密度と硬度を有する良好な鋳型を
造型できる効果がある。As shown in FIG. 1, when the movable guide plate 17 is stopped at the raised position by the mold matching cylinder 20,
After the empty flask 24 is moved by the hollow roller conveyors 22, 22 to a position where it directly faces the model plate 12 with a model, the mold matching cylinder 20 is operated and the piston rod 2 is moved.
1 is lowered, the movable die plate 17 is guided by the guide cylinder 16 via the squeeze cylinder 18, and is lowered along the column 3. In the above-described order, the mold 24 is attached to the sealing member 15 on the upper surface of the model stand 8. The lower end surface of the side wall and the upper end surface of the side wall of the flask 24 were mold-aligned with the seal member 29 on the lower end surface of the side wall of the auxiliary flask 25, respectively, and were closed by the extension portion 22a. The molding sand discharge hole 41 communicates with the molding sand blowing hole 28 . At this time, valve 4:
3 and 45 are closed, the two-way switching valve 37 is switched to the outside air side, and the valve 31 is open. In this state, when the valve 44 is opened, a compressed air source (not shown) is supplied to the plowing head 3.
Compressed air is pumped into the plowing head 39, and the casting and sand S supplied into the plowing head 39 pass through the molding sand discharge hole 41 and the molding sand blowing hole 28 to the molding flask 24 and the auxiliary molding flask 25 due to the flow velocity of the air. blown inward. At the same time, the air blown in is from the ventilation hole 35 to the cavity 34, the conduit 36, and the flexible tube 36a) to the outside air via the two-way switching valve 37, and on the side, from the exhaust hole 27 to the cavity 26 and the conduit 30. , to the outside air via the valve 31, and downwardly to the upper exhaust chamber 10 from the exhaust hole 14.
, exhaust hole 11, lower exhaust chamber 9, exhaust hole 6, exhaust chamber 5, ventilation hole 7b) are discharged to the outside air through the exhaust hole 7a, respectively. When the flask 24 and the auxiliary flask 25 are filled with molding sand S, the valve 31 is closed and the two-way switching valve 37 is switched to the blowing head 39 side, that is, to the compressed air side.
Then, the compressed air flows through the flexible tube 36a, the conduit 36, and the cavity 34.
The air is pumped downward from the ventilation hole 35 through the vent hole 35. This pumped air passes through the sand grain gaps of the filled foundry sand and flows down, and in the middle, in areas where the packing density is low, nearby foundry sand is moved to these areas by the flow velocity and replenished, increasing the packing density. After equalization, this air is finally discharged to the outside air through the exhaust hole 14. In this case, the auxiliary flask 25 and the compression plate 3
2. Auxiliary flask 25 and flask 24, and flask 24 and model stand 8,
Seal members 33, 29, 15, etc. are interposed between the model stand 8 and the model board 12, etc. to maintain airtightness, so that the force of the compressed air jetting out from the ventilation hole 35' can be weakened. It is possible to reach the surface of the model board 12 with the model without any problems. In this case, the air pressure from the plowing head 39 acts directly on the molding sand blowing hole 28 and they are hooked together, so the compressed air that is pumped into each of the flasks 24 and 25 flows back into the plowing head 39. The molding sand reliably passes through the molding sand filled in each of the flasks 24 and 25 without causing any damage, and hardens the sand on the surface of the plate 13a or the surface of the model 13 that has the exhaust hole 14 communicating with the plate 13a. .
In this way, the compressed air is passed through the molding sand and the plate 13 is
a and after increasing the packing density of the molding sand near the model 13, closing the valve 44 and opening the valves 31 and 45, switching the two-way switching valve 37 to the outside air side and returning the inside of the plowing head 39 to atmospheric pressure; Next, the squeeze cylinder 18 is operated to lower the piston rod 19 to press the molding sand filled with the compression plate 32 to increase the packing density of the molding sand near the compression plate 32. Therefore, it is possible to manufacture a mold having good uniform hardness as a whole. In this case, when replacing the mold 24 after release, which will be described later, the upper surface of the mold is pressed to a height that does not interfere with the lower end of the auxiliary flask 25 and the seal member 29. Thereafter, the squeeze cylinder 18 and the mold matching cylinder 20 are operated in the return direction. Then, first, the auxiliary flask 25 is removed from the mold, and as the flanged roller 23 comes into contact with the collar 24a of the flask 24, the mold in the flask 24 begins to be released from the model 13, and the mold matching cylinder 20 returns. Upon completion of the process, mold release is also completed, and the molded flask is replaced with the next empty flask, completing one cycle of molding. Note that during this cycle, when the inside of the plowing head 39 is at atmospheric pressure, the valve 43 is opened and the opening 4 is opened.
Foundry sand is supplied from 2. Furthermore, in the mold release step, air may be sent upward from the exhaust hole 14 to facilitate mold release. According to the present invention, as described above, after the molding sand is blown and filled, air is forced to pass through the sand grain gaps from the upper part of the filled molding sand, and the air is transferred to the model board 12 with a model. Since the air is discharged to the outside air through the exhaust hole 14 drilled in the model 13 and the plate 13a, when the molding sand is injected into the part that is in the shadow of the model 13 and has a smaller filling density of molding sand by 5. The molding sand is sufficiently replenished to equalize the packing density, and this, combined with the pressure of the compression plate 32, has the effect of making it possible to produce a good mold having uniform and sufficient filling density and hardness even for a complex-shaped model.

なお、この発明は上述の説明及び図例に制限さクれるも
のではなく、この発明の技術的思想から逸脱しない範囲
において、その実施態様を変更することができる。Note that this invention is not limited to the above description and illustrated examples, and the embodiments thereof can be changed without departing from the technical idea of this invention.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの発明の実施例を示す一部断面正面図である
。 １２・・・・・・模型付模型板、１４・・・・・・排気
孔、２４・・・・・・鋳枠、２５・・・・・・補助鋳枠
、２８・・・・・・鋳物砂吹込孔、３２・・・・・・圧
縮板、３５・・・・・・通気孔、３９・・・・・・プロ
ーイングヘツド、４１・・・・・・鋳物砂排出孔、４４
・・・・・・弁。FIG. 1 is a partially sectional front view showing an embodiment of the invention. 12... Model plate with model, 14... Exhaust hole, 24... Casting flask, 25... Auxiliary casting flask, 28... Molding sand blowing hole, 32... Compression plate, 35... Ventilation hole, 39... Plowing head, 41... Molding sand discharge hole, 44
······valve.

Claims (1)

【特許請求の範囲】[Claims] １ 模型付模型板表面の上側には鋳枠を、また、該鋳枠
の上側には補助鋳枠をそれぞれ積みかさね可能に形成さ
れ、該補助鋳枠内周面には圧縮板が上下摺動可能に嵌装
され、前記模型付模型板、鋳枠、補助鋳枠及び圧縮板に
よつて形成される空間内へ鋳物砂を吹込む手段を具備す
るように構成された鋳型造型機であつて、前記模型付模
型板にはその表面側から外気に連通する適数個の排気孔
が穿設され、前記補助鋳枠の側壁には前記鋳物砂吹込み
を司る鋳物砂吹込み孔が少くとも１個穿設され、前記圧
縮板の下面側から圧縮空気源に連通可能な適数個の通気
孔が穿設されたことを特徴とする鋳型造型機。1. A casting flask is formed on the upper side of the surface of the model plate with the model, and an auxiliary flask is stacked on the upper side of the flask, and a compression plate is vertically slidable on the inner peripheral surface of the auxiliary flask. A mold making machine configured to include a means for blowing molding sand into a space formed by the model plate with model, the flask, the auxiliary flask, and the compression plate. , the model board with the model is provided with an appropriate number of exhaust holes communicating with the outside air from the surface side thereof, and the side wall of the auxiliary casting flask is provided with at least a molding sand blowing hole for controlling the molding sand blowing. A mold making machine characterized in that one vent hole is bored and an appropriate number of vent holes are drilled to communicate with a compressed air source from the lower surface side of the compression plate.