JP2913393B2 - Molding method for casting - Google Patents
Molding method for castingInfo
- Publication number
- JP2913393B2 JP2913393B2 JP35982096A JP35982096A JP2913393B2 JP 2913393 B2 JP2913393 B2 JP 2913393B2 JP 35982096 A JP35982096 A JP 35982096A JP 35982096 A JP35982096 A JP 35982096A JP 2913393 B2 JP2913393 B2 JP 2913393B2
- Authority
- JP
- Japan
- Prior art keywords
- molding method
- casting
- mold
- sand mold
- present
- 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 - Lifetime
Links
Landscapes
- Casting Devices For Molds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】アンダーカットを有する構成を持
つ鋳鉄製品、例えば、マンホール蓋等鋳鉄蓋の把手を一
体的に形成する製品の造型法に係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of molding a cast iron product having an undercut, for example, a product formed integrally with a handle of a cast iron cover such as a manhole cover.
【０００２】[0002]
【従来の技術】従来、この種の造型法としては、中子を
使用する技術が一般的である。2. Description of the Related Art Conventionally, as a molding method of this kind, a technique using a core is generally used.
【０００３】[0003]
【発明が解決しようとする課題】本発明が目的とする要
点は、中子を使用する現在の造型法で製造される中間製
品の段階で、中子と本型の間に隙間が存在し、このた
め、いわゆる鋳バリの発生が多く、この処理に多大の工
数を要する状態に鑑み、前記中子を使用することなく、
目的構造を得る造型法を確立することを解決すべき技術
的課題とする。The gist of the present invention is that at the stage of an intermediate product manufactured by the current molding method using a core, a gap exists between the core and the main mold, For this reason, there are many occurrences of so-called casting burrs, and in view of a state in which this process requires a large number of steps, without using the core,
It is a technical problem to be solved to establish a molding method for obtaining a target structure.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
の技術的手段は、例として、マンホール蓋の把手部を造
型する構成として説明すると、従来、把手部を構成する
窪み部及びそこに橋絡する把手本体は一個の中子で形成
されていたが、本発明に於ては、該窪み部は本型と一体
として構成し、橋絡する把手本体を構成する部位はフル
モールド法のスチロフォームをもって構成ものである。The technical means for solving the above-mentioned problems is described, for example, as a structure in which a handle portion of a manhole cover is formed. Conventionally, a concave portion forming a handle portion and a bridge therethrough are provided. Although the handle main body to be entangled is formed by one core, in the present invention, the depression is formed integrally with the main body, and the portion constituting the handle main body to be bridged is a styro by a full mold method. It consists of a form.
【０００５】[0005]
【作用】上記構成になる造型法によると、窪み部の外周
端は砂型が連続しているため、鋳バリの発生がなく、橋
絡する把手本体部に於てもスチロフォームによる燃焼、
消滅型で構成するため接続部に隙間が存在せず、このた
め鋳バリの発生がなく、鋳物製品の生産工程の中で可成
りの工数を要するバリ取り作業を節約するものである。According to the molding method having the above-mentioned structure, since the sand mold is continuous at the outer peripheral end of the dent portion, there is no occurrence of casting burrs, and combustion of styrofoam occurs even in the bridging handle body portion.
Since there is no gap in the connecting portion because of the disappearing type, there is no occurrence of casting burrs, and it is possible to save a deburring operation requiring a considerable number of steps in the production process of a casting product.
【０００６】[0006]
【実施例】本発明の実施例を図面に基ずいて説明する。
図１に於て１は本発明を実施して製作した鉄蓋、２は窪
み部３、および把手本体をなす橋絡部４より成る把手
部。図２に於て５は砂型から成る下型、６は同じく上
型、７は燃焼、消滅型であるスチロフォーム片、図３に
於て８は前記下型５を作る模型、９は製品窪み部３を形
成する窪み部、１０はスチロフォーム片７の保持部、１
１は砂型製作に要する型枠を示す。次に本発明の実施手
順について説明すると、図３状態で保持部１０にスチロ
フォーム片７を載置し、そのままの状態で砂型の砂を注
入し、搗き固めて下型５を製作するものであり、上型６
の製作は従前通りである。An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an iron lid manufactured by carrying out the present invention, 2 denotes a handle portion including a recessed portion 3 and a bridging portion 4 forming a handle body. In FIG. 2, 5 is a lower mold made of a sand mold, 6 is an upper mold, 7 is a styrofoam piece which is a burning and extinguishing mold, and 8 is a model for making the lower mold 5 in FIG. The recessed part forming the part 3 is a holding part for the styrofoam piece 7,
Reference numeral 1 denotes a mold required for sand mold production. Next, the procedure of the present invention will be described. The lower mold 5 is manufactured by placing the styrofoam pieces 7 on the holding unit 10 in the state of FIG. Yes, upper die 6
Is as before.
【０００７】[0007]
【発明の効果】以上の如く本発明によれば、従来の中子
を使用することなくフルモールド法を一部で応用してス
チロフォーム片７を要部に埋込むことによりアンダーカ
ット部を処理することが出来るものであり、中子を使用
する製作法の欠点である鋳バリの発生が無く、このた
め、仕上工程の一部を省くことが出来、更に、高価な中
子を使用すること無く安価なスチロフォーム片を使用す
るため、コストダウンの効果もあり、有用性の高いもの
である。As described above, according to the present invention, the undercut portion is treated by embedding the styrofoam piece 7 in the main part by partially applying the full molding method without using the conventional core. It is possible to eliminate casting burrs, which is a drawback of the manufacturing method using a core, so that it is possible to omit a part of the finishing process and to use an expensive core. Since a low-cost and low-cost styrofoam piece is used, there is an effect of cost reduction, and the usefulness is high.
【図１】本発明を実施した製品の斜視図FIG. 1 is a perspective view of a product embodying the present invention.
【図２】本発明を実施した砂型組の正面断面図FIG. 2 is a front sectional view of a sand mold set embodying the present invention.
【図３】本発明を実施した砂型の下型を作る模型の斜視
図FIG. 3 is a perspective view of a model for producing a lower mold of a sand mold embodying the present invention.
１、鉄蓋 ２、把手部 ３、窪み部 ４、把手本体 ５、下型 ６、上型 ７、スチロフォーム片 ８、模型 ９、模型の窪み部 １０、保持部 １１、型枠 1, iron lid 2, handle 3, depression 4, handle main body 5, lower die 6, upper die 7, styrofoam pieces 8, model 9, model depression 10, holding portion 11, formwork
Claims (1)
成を持つ鋳鉄製品のアンダーカット形成部を、フルモー
ルド法で使用するスチロフォーム片の別体で作製し、砂
型造型時に一体として砂型中に埋込み、そのまま注湯し
て製品を得ることを特徴とする鋳造用造型法1. In a model for producing a sand mold, an undercut forming portion of a cast iron product having a configuration having an undercut is manufactured by a separate piece of a styrofoam piece used in a full molding method, and the sand mold is formed. Molding method for casting characterized by being embedded in a sand mold and pouring as it is to obtain a product
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35982096A JP2913393B2 (en) | 1996-12-25 | 1996-12-25 | Molding method for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35982096A JP2913393B2 (en) | 1996-12-25 | 1996-12-25 | Molding method for casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10180407A JPH10180407A (en) | 1998-07-07 |
| JP2913393B2 true JP2913393B2 (en) | 1999-06-28 |
Family
ID=18466465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35982096A Expired - Lifetime JP2913393B2 (en) | 1996-12-25 | 1996-12-25 | Molding method for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2913393B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496954B (en) * | 2019-08-28 | 2020-12-01 | 安徽普瑞明精密机械有限公司 | Well lid demolding structure based on Internet and using method thereof |
-
1996
- 1996-12-25 JP JP35982096A patent/JP2913393B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10180407A (en) | 1998-07-07 |
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