JPS6092045A - Formation of shell mold - Google Patents
Formation of shell moldInfo
- Publication number
- JPS6092045A JPS6092045A JP58201807A JP20180783A JPS6092045A JP S6092045 A JPS6092045 A JP S6092045A JP 58201807 A JP58201807 A JP 58201807A JP 20180783 A JP20180783 A JP 20180783A JP S6092045 A JPS6092045 A JP S6092045A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- shell
- blow nozzle
- sand
- blow
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/08—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
- B22C15/245—Blowing tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はシェルモールド造型法、特にブロ一方式におけ
るシェルモールド造型法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a shell mold manufacturing method, and particularly to an improvement in a shell mold manufacturing method in a one-way blow method.
（従来技術）
一般にシェルモールドを造型する場合、人別して、加熱
した金型模型をダンプ・ボックスの上にかぶせそれらを
反転させ、上記金型模型の上にシェル砂をかぶせて造型
する所謂ダンプ方式と、加熱した金型内に形成された空
洞部に該金型に形成されたブローノズルからシェル砂を
吹き込み造型する所謂ブロ一方式がある。そして、従来
後者のブロ一方式では第３図に示すように上型１ａとシ
ェルモールドの模型形状が形成されいる下型１ｂで構成
される造型用金型の上型１ａの背面に複数のブローノズ
ル３を形成して、シェル砂を予め加熱された金型内に吹
き込んでシェルモールドを造型していた。しかし、かか
る方法で造型する場合、金型１の空洞部２長手方向と直
角にシェル砂が吹き込まれるので、吹き込み抵抗が大き
く充填効率が悪いため分１１にシた多くのブローノズル
３を必要としていた。また、第４図に示すようにできあ
がったシｙ−）レモールドの背面４ｂにはブローノズル
３の数だりノズル跡５が形成されるため、その分シェツ
ト砂が余ｎ１に要り、またシェルモールド４を１１１な
うことのないよう」二記多くのノズル跡５を注意深く折
除しなければならないため余分な工数を必要とし、且つ
そのブローノズル３の付り根部分３ａがブローネックと
なるためシェルモールドの）９゜さを予め少し厚くする
必要がありその分余計にシェル砂を必要としていた。過
酷ともいえる価格競争を強いられ徹底した合理化が行わ
れている製造メーカにとって、上記不必要とも言える材
料、工数等の余分な経費は大いに問題となっていた。(Prior art) Generally, when molding a shell mold, the so-called dump method is used in which a heated mold model is placed on top of a dump box, turned over, and then shell sand is placed on top of the mold model. There is also a so-called blow method in which shell sand is blown into a cavity formed in a heated mold through a blow nozzle formed in the mold. Conventionally, in the latter type of blow molding, as shown in FIG. A nozzle 3 was formed to blow shell sand into a preheated mold to form a shell mold. However, when molding is performed using this method, the shell sand is blown in at right angles to the longitudinal direction of the cavity 2 of the mold 1, resulting in large blowing resistance and low filling efficiency, requiring a large number of blow nozzles 3. there was. In addition, since the number of blow nozzles 3 and nozzle marks 5 are formed on the back surface 4b of the completed shell mold as shown in FIG. 111. 2. Many nozzle marks 5 must be carefully broken off, which requires extra man-hours, and the root portion 3a of the blow nozzle 3 becomes a blow neck, so the shell It was necessary to make the mold a little thicker (9 degrees) in advance, which required extra shell sand. For manufacturers who are forced into intense price competition and are undergoing thorough rationalization, the above-mentioned unnecessary costs such as materials and man-hours have become a major problem.
（発明の目的）
そこで、本発明はブロ一方式にかかるシェルモールド造
型法を以下の如く改良することにより上記問題点を解決
せんとする。(Object of the Invention) Therefore, the present invention aims to solve the above-mentioned problems by improving the shell mold molding method according to the blow-type method as follows.
（発明の構成・作用）
即ち、本発明は第１図に示すように上型１ごと下型１ｂ
で構成される金型１内に形成されたフェルモールド４造
型用の空洞部２の長平方向と略一致させて、咳金型にシ
ェル砂を吹き込むフローノズル３を形成した金型１を用
いて、上記ブローノズル３からシェル砂を金型１内に吹
き込みシェル砂の吹き込み抵抗を少なくするごとにより
、吹き込み効率を向上させてブローノズル数を削減する
とともに、ブローノズル３の位置を変更することにより
シェルモールド４の厚さに影響を与えない位置でブロー
ネックが生しるようにし′ζ上記問題を解決した。(Structure and operation of the invention) That is, as shown in FIG.
Using a mold 1 in which a flow nozzle 3 for blowing shell sand into the cough mold is formed, the flow nozzle 3 for blowing shell sand into the cough mold is approximately aligned with the longitudinal direction of the cavity 2 for molding. By blowing shell sand into the mold 1 from the blow nozzle 3 and reducing the blowing resistance of the shell sand, the blowing efficiency is improved and the number of blow nozzles is reduced, and the position of the blow nozzle 3 is changed. The above problem was solved by allowing the blow neck to occur at a position that does not affect the thickness of the shell mold 4.
以下、本発明を実施例に基づいて詳細に説明する。第１
図は本発明にかかるシェルモールド造型法を実施する際
の金型の断面図、第２図は第１図の金型により造型され
たシェルモールドである。図において、１は本シェルモ
ールド造型法を実施するための金型で、金型１は」−型
１ａとシェルモールドの模型形状が形成されている下型
１ｂとにより構成されている６２は上記金型１内に形成
されたシェルモールド４を造型するための空洞部、３は
上記空洞部２にシェル砂を吹き込むための金型１に形成
されたブローノズル、４はシェルモールド本体、５は上
記シェルモールド４に形成されたブローノズル跡である
。本発明にかかる造型法では、ブローノズル３が空洞部
２長手方向と略一致して形成されノコ金型１を用い、上
記ブローノズル３よりシェル砂が予め加熱された金型１
内に吹き込まれる。かかる際、第１図に示すように上記
ブローノズル３の吹き込み方向と金型１内のシェルモー
ルドを形成する空洞部２の長手方向が略一致しているの
で、吹き込み抵抗が小さくなりシェル砂は速やかに且つ
極めてスムーズに該空洞部２の末端２ａまで吹き込まれ
る。そして、上記方法によると第２図に示すようなシェ
ルモールドが造型され、ブローノズル跡５は上記シェル
モールド４の側端面４ａに形成されることとなる。Hereinafter, the present invention will be explained in detail based on examples. 1st
The figure is a cross-sectional view of a mold for carrying out the shell mold manufacturing method according to the present invention, and FIG. 2 is a shell mold molded by the mold of FIG. 1. In the figure, 1 is a mold for implementing the present shell mold manufacturing method, and the mold 1 is composed of a mold 1a and a lower mold 1b in which the model shape of the shell mold is formed. A cavity formed in the mold 1 for molding a shell mold 4, 3 a blow nozzle formed in the mold 1 for blowing shell sand into the cavity 2, 4 a shell mold body, and 5 a blow nozzle formed in the mold 1; This is a blow nozzle mark formed on the shell mold 4. In the molding method according to the present invention, a saw mold 1 is used, in which a blow nozzle 3 is formed substantially in line with the longitudinal direction of the cavity 2, and the mold 1 has shell sand preheated by the blow nozzle 3.
blown inside. In this case, as shown in FIG. 1, the blowing direction of the blow nozzle 3 and the longitudinal direction of the cavity 2 forming the shell mold in the mold 1 are approximately the same, so that the blowing resistance is small and the shell sand is The air is blown quickly and extremely smoothly to the end 2a of the cavity 2. According to the above method, a shell mold as shown in FIG. 2 is formed, and the blow nozzle mark 5 is formed on the side end surface 4a of the shell mold 4.
（発明の効果）
上述の如く本方法によれば、吹き込み抵抗が小さいため
シェル砂は極めて速やかに且つスムーズに金型に充填さ
れるので、ブローノズルの数は従来の方法と比べ約８〜
９割も削減されるため、その分譲ブローノズル跡を形成
する月料（シェル砂）および該ブローノズル跡を切除す
る作業工数が削減でき、また」二記ブローネックとなる
ブローノズル付は根部分が金型のシェルモールド造型用
の空洞部の側端面に形成されているので、造型されるシ
ェルモールドの厚さに影響を与えることがないためシェ
ルモールド自体の厚さを従来の方法と比べ全体に約３〜
５割も薄くでき、飛躍的に材料（シェル砂）が削減可能
となる。即ち、本発明によりシェル砂等の材料、工数、
加熱するため等のエネルギー、加工時間等を生産工程で
削減することができるため、生産原価の大幅な引き下げ
が可能となる。(Effects of the Invention) As described above, according to this method, the shell sand is filled into the mold extremely quickly and smoothly due to the small blowing resistance, so the number of blow nozzles is about 8 to 8 compared to the conventional method.
Since the reduction is as much as 90%, it is possible to reduce the monthly charge (shell sand) that forms the blow nozzle mark and the number of man-hours required to remove the blow nozzle mark. is formed on the side end surface of the shell mold molding cavity of the mold, so it does not affect the thickness of the shell mold to be molded, so the overall thickness of the shell mold itself can be reduced compared to conventional methods. Approximately 3~
It can be made 50% thinner, dramatically reducing the amount of material (shell sand) required. That is, according to the present invention, materials such as shell sand, man-hours,
Since energy for heating, processing time, etc. can be reduced in the production process, production costs can be significantly reduced.
本シェルモールド造型法は比較的簡単な構成からなるに
もかかわらず、省エネルギーが叫ばれている今日、本発
明は上述の如く生産面の合理化において大いに寄与する
技術的効果の大きい非常に優れた発明である。Although this shell molding method has a relatively simple structure, in today's world where energy conservation is in demand, this invention is an extremely excellent invention with great technical effects that greatly contributes to rationalization of production as described above. It is.
第１図は本発明にかかるシェルモールド造型法を実施す
る隔月いる金型の断面図、第２図は第１図の金型により
造型されたシェルモールド、第３図は従来のシェルモー
ルド造型法を実施する隔月いる金型の断面図、第４図は
第３図の金型により造型された従来のシェルモールドで
ある。
■・・・金型、１ａ・・・上型、１ｂ・・・下型、２・
・・空洞部、２ａ・・・末端、３・・・ブローノズル、
３ａ・・・付は根部分、４・・・シェルモールド、４ａ
・・・側端面、４ｂ・・・背面、５・・・ブローノズル
跡。Figure 1 is a cross-sectional view of a bimonthly mold for implementing the shell mold manufacturing method according to the present invention, Figure 2 is a shell mold molded by the mold shown in Figure 1, and Figure 3 is a conventional shell mold manufacturing method. FIG. 4 is a cross-sectional view of the mold used every other month for carrying out the process, and is a conventional shell mold made by the mold shown in FIG. ■... Mold, 1a... Upper mold, 1b... Lower mold, 2.
...Cavity part, 2a... End, 3... Blow nozzle,
3a...Attachment is root part, 4...Shell mold, 4a
...Side end surface, 4b...Back surface, 5...Blow nozzle trace.
Claims (1)
砂を吹き込むブロ一式シェルモールド造型法おいて、上
記金型内に形成されたシェルモールド造型用の空洞部の
長手方向と略一致させてブローノズルを形成した金型を
用いて造型することを特徴とするシェルモールド造型法
。In the blow-set shell mold manufacturing method in which shell sand is blown into the mold through a blow nozzle formed in the mold, the blow nozzle is formed in the mold so that the shell sand is approximately aligned with the longitudinal direction of the shell mold molding cavity formed in the mold. A shell mold manufacturing method characterized by molding using a mold in which a blow nozzle is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201807A JPS6092045A (en) | 1983-10-26 | 1983-10-26 | Formation of shell mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201807A JPS6092045A (en) | 1983-10-26 | 1983-10-26 | Formation of shell mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6092045A true JPS6092045A (en) | 1985-05-23 |
Family
ID=16447241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58201807A Pending JPS6092045A (en) | 1983-10-26 | 1983-10-26 | Formation of shell mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6092045A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0815986A1 (en) * | 1996-06-28 | 1998-01-07 | Georg Fischer Disa, Inc. | Apparatus and methods for extruding and gassing of sand |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139143A (en) * | 1979-04-13 | 1980-10-30 | Sintokogio Ltd | Core molding method |
-
1983
- 1983-10-26 JP JP58201807A patent/JPS6092045A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139143A (en) * | 1979-04-13 | 1980-10-30 | Sintokogio Ltd | Core molding method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0815986A1 (en) * | 1996-06-28 | 1998-01-07 | Georg Fischer Disa, Inc. | Apparatus and methods for extruding and gassing of sand |
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