JPH0367779B2 - - Google Patents
Info
- Publication number
- JPH0367779B2 JPH0367779B2 JP17060589A JP17060589A JPH0367779B2 JP H0367779 B2 JPH0367779 B2 JP H0367779B2 JP 17060589 A JP17060589 A JP 17060589A JP 17060589 A JP17060589 A JP 17060589A JP H0367779 B2 JPH0367779 B2 JP H0367779B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- flask
- joint frame
- casting
- molding sand
- 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
Links
- 238000005266 casting Methods 0.000 claims description 18
- 239000003110 molding sand Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 description 7
- 238000005336 cracking Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鋳型造型方法の改良に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a mold making method.
（従来の技術）
継ぎ枠を具備した鋳型を用いた造型装置および
造型方法として、特開昭63−93447号公報に示す
ようなものがあり、このものは、模型定盤上に継
ぎ枠および鋳枠が載置され、模型と鋳枠との間の
模型定盤部位に排気孔が適数個設けられ、鋳型造
型に際して鋳物砂と共に多量の圧縮エアを継ぎ枠
および鋳枠内に吹込み、次いで圧縮エアを排気孔
から大気中に排出している。(Prior art) There is a molding device and a molding method using a mold equipped with a joint frame as shown in Japanese Patent Application Laid-Open No. 63-93447. The frame is placed, and an appropriate number of exhaust holes are provided in the model surface area between the model and the casting flask, and during mold making, a large amount of compressed air is blown into the joint frame and the casting flask together with the molding sand. Compressed air is discharged into the atmosphere from the exhaust hole.
（発明が解決しようとする課題）
従来の造型方法では、継ぎ枠および鋳枠内に多
量に吹込まれた圧縮エアが十分に抜気されず、鋳
枠と模型間に充填された鋳物砂が高密度状態に充
填されにくく、鋳型の搬送工程又は注湯時に鋳型
変形が起こり易いという問題点がある。又、鋳枠
および継ぎ枠は矩形状の金枠から形成されている
ので、造型された鋳型の重量が大となると共に、
鋳造時に発生するガスが十分に抜気されず、鋳造
品にガス欠陥が発生するという問題点がある。そ
こで、本発明はかかる問題点を解消するためにな
されたもので、軽量かつ変形しにくい鋳型の造型
方法を提供するものである。(Problem to be solved by the invention) In the conventional molding method, the large amount of compressed air blown into the joint flask and the casting flask is not sufficiently vented, and the molding sand filled between the flask and the mold becomes high. There is a problem that it is difficult to fill the metal in a dense state, and mold deformation is likely to occur during the transport process of the mold or during pouring. In addition, since the casting flask and joint frame are formed from rectangular metal frames, the weight of the formed mold becomes large, and
There is a problem in that the gas generated during casting is not sufficiently vented, resulting in gas defects in the cast product. Therefore, the present invention has been made to solve these problems, and provides a method for manufacturing a mold that is lightweight and difficult to deform.
（課題を解決するための手段）
本発明の鋳型造型方法は、継ぎ枠と鋳枠とが凹
凸係合し、該両枠内に充填された鋳物砂を、突条
を有する押圧板で押圧し、次いで継ぎ枠を除去す
るものである。(Means for Solving the Problems) In the mold making method of the present invention, a joint frame and a casting flask are engaged with each other in an uneven manner, and molding sand filled in both frames is pressed by a pressing plate having ridges. , then the joint frame is removed.
（作用）
本発明は上述の様な構成であるので、突条を有
する押圧板で鋳物砂を押圧すると、鋳枠と模型と
の間に充填された鋳物砂の砂密度が大となると共
に、継ぎ枠内の鋳物砂が高密度状態に充填され
る。その後、継ぎ枠を除去すると、鋳枠の凸部
が、鋳枠の上面から突出した鋳物砂を係止めして
型割れを防止する。(Function) Since the present invention has the above-described configuration, when the molding sand is pressed by the pressing plate having the protrusions, the sand density of the molding sand filled between the flask and the model increases, and The molding sand in the joint frame is filled with high density. Thereafter, when the joint frame is removed, the convex portion of the flask locks the molding sand protruding from the upper surface of the flask to prevent mold cracking.
（実施例）
第１〜２図に本発明に係る造型方法が示され、
模型定盤１上に矩形状の鋳枠２および継ぎ枠３が
載置され、継ぎ枠３下端部と鋳枠２上端部とが凹
凸係合する様に形成され、さらに鋳枠２上端部に
はシール部材（図示せず）が付設されている。鋳
枠２は矩形状の鋳枠本体４と本体上面５の四隅部
に立設された略Ｌ字状の凸部６とを具備し、鋳枠
本体４は鋳物砂７の高さより低く形成されると共
に、凸部６が本体上面５から突出した鋳物砂７を
係止めしている。鋳枠本体４および凸部６のそれ
ぞれの高さは、鋳型の重量、鋳型の強度および鋳
造時のガス抜き等を考慮して適宜決められ、鋳枠
本体４と凸部６との組合わせによつて鋳型の軽量
化を図るものである。８は矩形状の突条９を有す
る押圧板である。(Example) Figures 1 and 2 show the molding method according to the present invention,
A rectangular casting flask 2 and a joint frame 3 are placed on a model surface plate 1, and the lower end of the joint frame 3 and the upper end of the flask 2 are formed so as to engage with each other in an uneven manner. A sealing member (not shown) is attached. The flask 2 includes a rectangular flask body 4 and approximately L-shaped protrusions 6 erected at the four corners of the upper surface 5 of the flask, and the flask body 4 is formed to be lower than the height of the molding sand 7. At the same time, the convex portion 6 locks the molding sand 7 protruding from the upper surface 5 of the main body. The respective heights of the flask body 4 and the convex portions 6 are appropriately determined by considering the weight of the mold, the strength of the mold, gas venting during casting, etc., and are determined depending on the combination of the flask body 4 and the convex portions 6. This is intended to reduce the weight of the mold. 8 is a pressing plate having a rectangular protrusion 9;
次に、造型作業について説明する。 Next, the molding work will be explained.
模型定盤１上に鋳枠２および継ぎ枠３を載置す
ると、継ぎ枠３下端部と鋳枠２上端部とが凹凸係
合して継ぎ枠３が鋳枠２に密嵌合に枠合せさせ
る。その後、該両枠２，３内に鋳物砂７を投入
し、次いで突条９を有する押圧板８で鋳物砂７を
押圧して高密度状態に充填する。しかる後、模型
定盤１および継ぎ枠３を除去すると、第３図に示
す様な鋳型が得られ、凸部６が本体上面５から突
出した鋳物砂７を係止めして型割れを防止する。 When the flask 2 and the joint frame 3 are placed on the model surface plate 1, the lower end of the joint frame 3 and the upper end of the mold flask 2 are engaged with each other, and the joint frame 3 is tightly fitted to the mold flask 2. let Thereafter, molding sand 7 is introduced into both the frames 2 and 3, and the molding sand 7 is pressed by a pressing plate 8 having protrusions 9 to fill the molding sand 7 in a high-density state. Thereafter, when the model surface plate 1 and the joint frame 3 are removed, a mold as shown in FIG. 3 is obtained, and the convex portion 6 locks the molding sand 7 protruding from the upper surface 5 of the main body to prevent the mold from cracking. .
第４〜５図に他に実施例が示され、矩形状の鋳
枠１２の本体上面１５のそれぞれの辺部の略中央
に四角錐台状の凸部１６が立設される以外は前記
実施例と同様に形成され、鋳枠１２は継ぎ枠１３
と凹凸係合する。該両枠１２，１３を用いて前記
実施例と同様の鋳型造型を行なうと、第６図に示
す様な鋳型が得られ、凸部１６が本体上面１５か
ら突出した鋳物砂１７を係止めして型割れを防止
する。 Another embodiment is shown in FIGS. 4 and 5, and the above-described embodiment is shown except that a truncated quadrangular pyramid-shaped convex portion 16 is erected approximately at the center of each side of the upper surface 15 of the main body of the rectangular casting flask 12. The casting flask 12 is formed in the same manner as in the example, and the flask 13 is
Engage with the uneven surface. When molding is carried out in the same manner as in the above embodiment using both frames 12 and 13, a mold as shown in FIG. to prevent mold cracking.
（発明の効果）
本発明によれば、継ぎ枠と鋳枠とが凹凸係合
し、該両枠内に充填された鋳物砂を、突条を有す
る押圧、次いで継ぎ枠を除去するで、鋳型の軽量
化が可能となり、鋳造時のガス抜きが速やかに行
なわれ、搬送工程又は時間経過に伴う鋳変形およ
び鋳込圧力によるハリが防止され、不良品の発生
が著しく低減する。(Effects of the Invention) According to the present invention, the joint frame and the casting flask are engaged with each other, and the molding sand filled in both frames is pressed with the protrusions, and then the joint frame is removed. This makes it possible to reduce the weight of the molded material, to quickly degas it during casting, to prevent molding deformation during the transportation process or over time, and to prevent firmness due to casting pressure, thereby significantly reducing the occurrence of defective products.
第１図は本発明方法を示す正面図、第２図は鋳
枠の平面図、第３図は造型された鋳型を示す正面
図、第４図は本発明方法の他の実施例を示す正面
図、第５図は他の実施例に用いられる鋳枠の平面
図、第６図は他の実施例により造型された鋳型の
正面図である。
２，１２……鋳枠、３，１３……継ぎ枠、７，
１７……鋳物砂、８……押圧板、９……突条。
Fig. 1 is a front view showing the method of the present invention, Fig. 2 is a plan view of the casting flask, Fig. 3 is a front view showing the cast mold, and Fig. 4 is a front view showing another embodiment of the method of the present invention. 5 is a plan view of a casting flask used in another embodiment, and FIG. 6 is a front view of a mold molded according to another embodiment. 2, 12... Casting frame, 3, 13... Joint frame, 7,
17... Foundry sand, 8... Pressing plate, 9... Projection.
Claims (1)
鋳型造型方法において、継ぎ枠と鋳枠とが凹凸係
合し、該両枠内に充填された鋳物砂を、突状を有
する押圧板で押圧し、次いで継ぎ枠を除去するこ
とを特徴とする鋳型造型方法。1. In a mold making method in which a casting flask equipped with a joint frame is filled with foundry sand, the joint frame and the casting flask are engaged with each other in a concave and convex manner, and the molding sand filled in both frames is moved by a pressing plate having a protruding shape. A mold making method characterized by pressing the mold with a mold and then removing a joint frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17060589A JPH0335841A (en) | 1989-06-30 | 1989-06-30 | Method of making mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17060589A JPH0335841A (en) | 1989-06-30 | 1989-06-30 | Method of making mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0335841A JPH0335841A (en) | 1991-02-15 |
| JPH0367779B2 true JPH0367779B2 (en) | 1991-10-24 |
Family
ID=15907953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17060589A Granted JPH0335841A (en) | 1989-06-30 | 1989-06-30 | Method of making mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0335841A (en) |
-
1989
- 1989-06-30 JP JP17060589A patent/JPH0335841A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0335841A (en) | 1991-02-15 |
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