JPS6110828Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は、側面に製品キヤビテイのキヤビテイ
面を、上部位置に湯道をそれぞれ有する無枠式堅
型鋳型を造型するのに好適な鋳型箱に関する。[Detailed Description of the Invention] The present invention relates to a molding box suitable for molding a frameless rigid mold having a cavity surface of a product cavity on the side surface and a runner in the upper position.

従来、無枠式鋳型の１つとして第４図に示すよ
うに、製品キヤビテイ４１の半型のキヤビテイ面
４２，４３を左右の側面に有する多数の鋳型４
４，４４を左右方向に一直線状に並べて多数の鋳
型キヤビテイ４１，４１を形成するようにしたも
のがあるが、この鋳型においては、多数の製品キ
ヤビテイ４１，４１への注湯は各キヤビテイ４１
毎に行わなければならず、非常に厄介であるとと
もに効率が悪かつた。 Conventionally, as one of the frameless molds, as shown in FIG.
4 and 44 are arranged in a straight line in the left and right direction to form a large number of mold cavities 41, 41, but in this mold, pouring into the large number of product cavities 41, 41 is carried out in each cavity 41.
This had to be done every time, which was very troublesome and inefficient.

そのため、鋳型上面における湯口の直上方位置
に互に連通接続する溝を設け、この溝内に溶湯を
流すことにより注湯するようにした鋳型が開発さ
れているが、この鋳型では溶湯が流れる間、外気
にさらされているため途中で凝固してしまうなど
の新たな問題が起きている。 Therefore, a mold has been developed in which grooves are provided on the upper surface of the mold, directly above the sprue, and the molten metal is poured by flowing into these grooves. New problems have arisen, such as solidification during the process due to exposure to the outside air.

本考案は上記の事情に鑑みてなされてもので、
その目的は多数の製品キヤビテイに対して溶湯を
適確に注入できる湯道を備えた無枠式堅型鋳型を
造型することができる鋳型箱を提供することにあ
る。 This idea was made in view of the above circumstances,
The purpose is to provide a mold box capable of molding frameless rigid molds equipped with runners that can accurately inject molten metal into a large number of product cavities.

以下、本考案の一実施例について図面に基づき
詳細に説明する。１は図示されない基台のダイベ
ースに取り付けられた垂直割型鋳型箱で、該鋳型
箱１は、左右方向に指向する四角筒体を成すとと
もに上部胴壁のほぼ中央位置に鋳砂物の供給口２
ａを有する鋳型箱本体２と、該本体２内の右側位
置に固着されるとともに左側面に鋳型キヤビテイ
３のキヤビテイ面４ａを有する固定模型板４と、
本体２内に左右に摺動自在に嵌合されるとともに
右側面に鋳型キヤビテイ３のキヤビテイ面５ａを
有する。可動模型板５とで構成されており、該可
動模型板５は基台（図示せず）に装着された横向
きシリンダ６のピストンロツドの先端に固着され
ている。なお、シリンダ６の伸長作動により右方
に移動する可動模型板５は途中で一度停止して所
定の鋳型キヤビテイ３より大きなキヤビテイを画
成し、このキヤビテイが画成された時に鋳砂物が
吸い込まれるように構成されている。また、可動
模型板５のキヤビテイ面５ａの上部位置には堰模
型部７が突設され、該堰模型部７の上端には主型
の厚さより長さの長い湯道模型部８が右方に延び
て形成されている。そして、固定模型板４のキヤ
ビテイ面４ａには湯道模型部８の先端が摺動嵌入
可能なガイド穴９が湯道模型部８と対応して設け
られている。さらに、固定模型板４と可動模型板
５の内部には中空室１０，１１がそれぞれ形成さ
れており、該中空室１０，１１はベントプラグ
（図示せず）を嵌着した多数の小孔１２，１２，
１３，１３をそれぞれ介してキヤビテイ面４ａ，
５ｂに連通されている。そして、中空室１０，１
１は導管１４，１５，１６、および開閉弁１７，
１８を介して互いに連通接続され、導管１５には
分岐管１９を介して真空ポンプ２０が、また導管
１６には分岐管２１および開閉弁２２を介して硬
化ガス供給装置２３がそれぞれ連通接続されてい
る。２４は可動模型板５の外周面に埋設されたシ
ール部材である。 Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Reference numeral 1 denotes a vertically split molding box attached to a die base of a base (not shown), and the molding box 1 forms a rectangular cylindrical body oriented in the left-right direction, and has a casting sand supply port approximately in the center of the upper body wall. 2
a mold box main body 2 having a diameter of 1.a; a fixed model plate 4 fixed to the right side of the main body 2 and having a cavity surface 4a of the mold cavity 3 on the left side;
It is fitted into the main body 2 so as to be slidable left and right, and has a cavity surface 5a of the mold cavity 3 on the right side. The movable model plate 5 is fixed to the tip of a piston rod of a horizontal cylinder 6 mounted on a base (not shown). The movable model plate 5, which moves to the right due to the extension of the cylinder 6, stops once on the way to define a cavity larger than the predetermined mold cavity 3, and when this cavity is defined, the casting sand is sucked in. It is configured so that Further, a weir model part 7 is protruded from the upper part of the cavity surface 5a of the movable model plate 5, and a runner model part 8 having a length longer than the thickness of the main mold is located on the right side at the upper end of the weir model part 7. It is formed by extending to. A guide hole 9 is provided in the cavity surface 4a of the fixed model plate 4 in correspondence with the runner model part 8, into which the tip of the runner model part 8 can be slidably inserted. Furthermore, hollow chambers 10 and 11 are formed inside the fixed model plate 4 and the movable model plate 5, respectively, and each of the hollow chambers 10 and 11 has a large number of small holes 12 into which vent plugs (not shown) are fitted. ,12,
13, 13 respectively, the cavity surface 4a,
5b. And hollow chamber 10,1
1 is a conduit 14, 15, 16, and an on-off valve 17,
A vacuum pump 20 is connected to the conduit 15 through a branch pipe 19, and a curing gas supply device 23 is connected to the conduit 16 through a branch pipe 21 and an on-off valve 22. There is. 24 is a sealing member embedded in the outer peripheral surface of the movable model plate 5.

次にこのように構成された装置の作動について
説明する。シリンダ６の伸長作動により可動模型
板５を右方に移動させて可動模型板５を鋳型箱本
体２内に、その湯道模型部８の先端を固定模型板
４のガイド穴９にそれぞれ嵌入させ、鋳型箱本体
２、固定模型板４および可動模型板５によりキヤ
ビテイを画成する。このキヤビテイが所定の鋳型
キヤビテイ３より若干大きなものになつた時、シ
リンダ６の伸長作動を一度停止する。次に真空ポ
ンプ２０の稼動を続さた状態で開閉弁１７，１８
を開いて前記キヤビテイ内を吸引減圧し、ガス硬
化性の粘結剤を含有する鋳砂物を収納したホツパ
装置（図示せず）を下降させてその排出口を鋳型
箱本体３の供給口２ａに接続し、その排出口を所
要時間開いてホツパ内の鋳物砂を供給口２ａから
キヤビテイ内に吸い込ませ充填し、シリンダ６を
さらに伸長作動して可動模型板５を右方に移動さ
せ、キヤビテイを所定の鋳型キヤビテイ３に縮少
して吸い込された鋳物砂を圧縮し充填密度を高め
る。次いで、ホツパ装置（図示せず）を上昇させ
てその排出口を供給口２ａから引き離し、適宜の
手段により供給口２ａを閉鎖したのち開閉弁１８
を閉じるとともに開閉弁２２を開し、硬化ガス供
給装置２３に貯蔵されている硬化ガスを、導管１
６、中空室１１、小孔１３，１３を順に通過させ
て鋳型キヤビテイ３内に導入し、その内の鋳物砂
中を貫流させて鋳物砂を硬化させ、鋳物砂を硬化
させたのちの硬化ガスを、小孔１２，１２、中空
室１０、導管１４、開閉弁１７、分岐管１９を順
に通過させて真空ポンプ２０に付設された中和槽
（図示せず）に導入し、中和して大気中に排出す
る。鋳物砂を硬化させる所要時間が経過したのち
開閉弁２２を閉じて硬化ガスの供給を停止すると
ともに開閉弁１７を閉じて吸引を中止し、シリン
ダ６の短縮作動により可動模型板５を左方に移動
させて鋳型箱１を開き、圧縮されて密度が高くか
つ硬化されて強度が高い鋳型を取り出す。こうし
て造型された鋳型３１は第３図に示すように製品
キヤビテイ３２の上方の堰３３の上に前後方向に
延びる湯道３４を備えている。この鋳型３１を第
２図に示すように多数個、左右方向に並べて多数
個の製品キヤビテイ３２を構成するとともにその
湯道３４，３４同志を互いに接続し、左右両端の
鋳型３１ａ，３１ｂの湯道３４ａ，３４ｂの各一
端を閉鎖するとともに鋳型３１ａの上面に湯道３
４ａに至る湯口３５を形成して該湯口３５に溶湯
を注入すると、当該溶湯は堰３３を通つてまず左
側の製品キヤビテイ３２内に流入し、この製品キ
ヤビテイ３２内に充満したのちは湯道３４を貫流
して次の製品キヤビテイ３２内に流入し充満す
る。こうした現象を繰り返して製品キヤビテイ３
２ａ，３２ｂ………は溶湯で適確に充満される。 Next, the operation of the device configured as described above will be explained. The movable model plate 5 is moved to the right by the extension action of the cylinder 6, and the movable model plate 5 is inserted into the mold box body 2, and the tip of the runner model part 8 is inserted into the guide hole 9 of the fixed model plate 4. , a mold box body 2, a fixed model plate 4, and a movable model plate 5 define a cavity. When this cavity becomes slightly larger than the predetermined mold cavity 3, the extension operation of the cylinder 6 is once stopped. Next, while the vacuum pump 20 continues to operate, the on-off valves 17 and 18
The cavity is opened and the pressure inside the cavity is suctioned and depressurized, and a hopper device (not shown) containing foundry sand containing a gas-hardening binder is lowered and its discharge port is connected to the supply port 2a of the mold box body 3. The discharge port is opened for a required period of time, and the molding sand in the hopper is sucked into the cavity from the supply port 2a to fill the cavity.The cylinder 6 is further extended to move the movable model plate 5 to the right, and the molding sand in the hopper is filled into the cavity. is contracted into a predetermined mold cavity 3 to compress the sucked molding sand and increase the packing density. Next, the hopper device (not shown) is raised to separate its discharge port from the supply port 2a, and after closing the supply port 2a by an appropriate means, the on-off valve 18 is closed.
is closed, the on-off valve 22 is opened, and the curing gas stored in the curing gas supply device 23 is transferred to the conduit 1.
6. The hardening gas is introduced into the mold cavity 3 by passing through the hollow chamber 11 and the small holes 13, 13 in order, and is caused to flow through the molding sand therein to harden the molding sand. is passed through the small holes 12, 12, the hollow chamber 10, the conduit 14, the on-off valve 17, and the branch pipe 19 in order and introduced into a neutralization tank (not shown) attached to the vacuum pump 20, where it is neutralized. Emitted into the atmosphere. After the time required to harden the foundry sand has elapsed, the on-off valve 22 is closed to stop the supply of hardening gas, the on-off valve 17 is closed to stop suction, and the movable model plate 5 is moved to the left by the shortening operation of the cylinder 6. The mold box 1 is moved and the mold box 1 is opened, and a mold that has been compressed and has a high density and is hardened and has a high strength is taken out. As shown in FIG. 3, the mold 31 thus formed is provided with a runner 34 extending in the front-rear direction above the weir 33 above the product cavity 32. As shown in FIG. 2, a large number of these molds 31 are arranged in the left and right direction to form a large number of product cavities 32, and the runners 34, 34 are connected to each other, and the runners of the molds 31a, 31b at both left and right ends are formed. 34a and 34b are closed, and a runner 3 is placed on the upper surface of the mold 31a.
4a is formed and molten metal is injected into the sprue 35, the molten metal first flows into the product cavity 32 on the left side through the weir 33, and after filling the product cavity 32, it flows into the runner 34. The liquid flows through and flows into the next product cavity 32 and fills it. By repeating these phenomena, the product cavity 3
2a, 32b, . . . are appropriately filled with molten metal.

なお、上記の実施例では、堰模型部７および湯
道模型部８は、キヤビテイ面５ａの上部位置に突
設されているが、たとえば、第５図の如く第１図
の模型板５、堰模型部７および湯道模型部８の関
係をそのままにして転倒させた状態にしてもよ
い。この場合、造型された鋳型は注湯に際して堰
と湯道が上方位置にくるように回転させる必要が
ある。模型板４は鋳型箱本体２に固定して固定模
型板としてあるが、模型板５のように可動模型板
にしてもよく、この場合、キヤビテイ内の鋳物砂
を左右の両側から圧縮することができる。また、
鋳型箱本体２は四角筒状体を成しているが、筒体
ならどんな形状でもよい。さらに、鋳型キヤビテ
イ３内への鋳物砂の充填は吸込方式によつている
が、圧縮空気を利用した吸込方式によつてもよ
い。さらにまた、鋳物砂の硬化はガス硬化性の粘
結剤によつているが、たとえば、生型用鋳物砂を
用いてスクイズだけによつてもよい。 In the above embodiment, the weir model part 7 and the runner model part 8 are provided in a protruding manner at the upper part of the cavity surface 5a, but for example, as shown in FIG. The relationship between the model part 7 and the runner model part 8 may be left as is, and the model part 7 and the runner model part 8 may be turned over. In this case, the mold must be rotated so that the weir and runner are in the upper position during pouring. Although the model plate 4 is fixed to the mold box body 2 as a fixed model plate, it may also be a movable model plate like the model plate 5. In this case, the molding sand in the cavity can be compressed from both the left and right sides. can. Also,
The mold box body 2 has a rectangular cylindrical shape, but it may have any shape as long as it is a cylindrical body. Further, although the mold cavity 3 is filled with molding sand by a suction method, a suction method using compressed air may also be used. Furthermore, although the foundry sand is hardened by a gas-hardening binder, it may also be done by squeezing alone using, for example, green foundry sand.

以上の説明からも明らかなように本考案は、筒
状体の鋳型箱本体内に、鋳型キヤビテイのキヤビ
テイ面を有する２個の模型板を、少なくとも一方
を摺動自在にして嵌装し、この２個の模型板のう
ち一方の模型板のキヤビテイ面に、堰模型部と、
該堰模型部先端に当接しキヤビテイ面とほぼ直交
する方向に延びる湯道模型部とを、突設するとと
もに他方の模型板のキヤビテイ面に湯道模型部の
ガイド穴を設けたから、鋳型箱本体に模型板を嵌
入摺動して所定の鋳型キヤビテイを画成するとと
もに当該キヤビテイ内に鋳物砂を充填し、該鋳物
砂を適宜の方法により硬化させることによつて、
湯道と堰とを備えた無枠式竪型鋳型を容易かつ確
実に造型することができ、しかも、当該鋳型に注
入されて湯道を貫流する溶湯は、湯道の貫流中に
外気にさらされることはなく、したがつて途中で
凝固する不都合も起らないなどの優れた効果を奏
する。 As is clear from the above description, the present invention involves fitting two model plates each having a cavity surface of a mold cavity into a cylindrical mold box body, with at least one of them slidable. On the cavity surface of one of the two model plates, there is a weir model part,
A runner model part that comes into contact with the tip of the weir model part and extends in a direction substantially perpendicular to the cavity surface is provided protrudingly, and a guide hole for the runner model part is provided in the cavity surface of the other model plate, so that the mold box body By inserting and sliding a model plate to define a predetermined mold cavity, filling the cavity with molding sand, and hardening the molding sand by an appropriate method,
A frameless vertical mold equipped with a runner and a weir can be easily and reliably molded, and the molten metal poured into the mold and flowing through the runner is exposed to the outside air while flowing through the runner. Therefore, excellent effects such as no inconvenience caused by solidification during the process are achieved.

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

第１図は本考案の一実施例を示す一部切欠正面
図、第２図は本考案の鋳型箱を用いて造型した鋳
型の縦断面図、第３図は第２図のＡ〜Ａ断面図、
第４図は従来の無枠式竪型鋳型、第５図は他の実
施例における第１図のＢ〜Ｂ断面図である。 ２ａ：吸込口、２：鋳型箱本体、３：鋳型キヤ
ビテイ、４ａ，５ａ：キヤビテイ面、４：固定模
型板、５：可動模型板、７：堰模型部、８：湯道
模型部、９：ガイド穴。 Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of a mold made using the mold box of the present invention, and Fig. 3 is a cross section from A to A in Fig. 2. figure,
FIG. 4 is a conventional frameless vertical mold, and FIG. 5 is a sectional view taken along line B-B in FIG. 1 in another embodiment. 2a: Suction port, 2: Mold box body, 3: Mold cavity, 4a, 5a: Cavity surface, 4: Fixed model plate, 5: Movable model plate, 7: Weir model part, 8: Runway model part, 9: guide hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 鋳物砂の供給口２ａを胴壁に備えた筒体状の鋳
型箱本体２内に、鋳型キヤビテイ３のキヤビテイ
面４ａ，５ａを側面に有する２個の模型板４，５
を、前記キヤビテイ面４ａ，５ａを互に対向させ
るとともに前記吸込口２ａの両側に位置させて嵌
装し、該２個の模型板４，５のうち一方の模型板
のキヤビテイ面には堰模型部７を突設しかつ該堰
模型部７の先端部に当接するとともに前記キヤビ
テイ面とほぼ直交する方向に延びる湯道模型部８
を固着しさらに他方の模型板のキヤビテイ面には
前記湯道模型部８の先端が嵌入摺動できるガイド
穴９を設け、前記模型板４，５のうち少なくとも
一方を前記鋳型箱本体２に対して摺動自在にした
ことを特徴とする鋳型造型鋳型箱。 Inside a cylindrical mold box main body 2 having a molding sand supply port 2a in the body wall, two model plates 4, 5 having cavity surfaces 4a, 5a of a mold cavity 3 on their sides are installed.
are fitted with the cavity surfaces 4a and 5a facing each other and positioned on both sides of the suction port 2a, and a weir model is mounted on the cavity surface of one of the two model plates 4 and 5. A runner model part 8 which protrudes from the weir model part 7 and abuts the tip of the weir model part 7 and extends in a direction substantially perpendicular to the cavity surface.
Further, a guide hole 9 is provided in the cavity surface of the other model plate into which the tip of the runner model part 8 can fit and slide, and at least one of the model plates 4 and 5 is attached to the mold box body 2. A mold box for mold making, which is characterized by being able to slide freely.