JPS6174765A - Casting method for metallic pattern - Google Patents

Casting method for metallic pattern

Info

Publication number
JPS6174765A
JPS6174765A JP59198180A JP19818084A JPS6174765A JP S6174765 A JPS6174765 A JP S6174765A JP 59198180 A JP59198180 A JP 59198180A JP 19818084 A JP19818084 A JP 19818084A JP S6174765 A JPS6174765 A JP S6174765A
Authority
JP
Japan
Prior art keywords
mold
casting
pattern
casting method
molten metal
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
Application number
JP59198180A
Other languages
Japanese (ja)
Inventor
Masato Goie
政人 五家
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP59198180A priority Critical patent/JPS6174765A/en
Publication of JPS6174765A publication Critical patent/JPS6174765A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

PURPOSE:To obtain a casting method with which the cost of manufacturing a casting mold is relatively low and which can decrease casting defects and improve dimensional accuracy in the casting method which pours a molten metal into a sand mold having air permeability while evacuating and sucking the air from the outside of the mold. CONSTITUTION:A sintered metallic pattern 1 having air premeability is contained in a box body 2 and the box is hermetically closed by a cap 4 having an aperture in the position corresponding to the sprue 3 of the pattern 1. The body 2 has a duct 5 communicating with a gas evacuating section and while the inside of the body 2 is maintained under the negative pressure, the molten metal is poured into the pattern 1. Since the casting mold has high strength according to such method, the production of not only thin-walled and small-sized articles but also thick-walled articles is made possible and since the pattern 1 having an optional shape can be manufactured by molding the same by a press die and sintering the molding, the cost of manufacturing the metallic pattern is low. The improvement in the dimensional accuracy and the prevention of casting defects are attained as well.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は鋳造法に係り、特に通気性を有する金製に用い
るのに適した金型鋳造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a casting method, and particularly to a mold casting method suitable for use in breathable metal.

従来の技術 通気性を有する砂型鋳型の外周から減圧吸引しながら溶
湯を注入する鋳造法は既に開発されているか、鋳型の強
度か弱いため薄物品、小物品Ｉ７）鋳造に多く用いられ
ていた。Conventional technology A casting method in which molten metal is injected from the outer periphery of a sand mold with air permeability while vacuum suction is applied has already been developed, or because the strength of the mold is weak, it is often used for casting thin and small articles.

一方、近年普及しつつある金型鋳造法は、寸法精度が良
好で、且つ注入歩留りも向上し得るなど潰れた長所を備
えるものであるが、金型の製作費が高価であるため一般
には余り利用されていないのが現状である。On the other hand, the mold casting method, which has become popular in recent years, has the advantages of good dimensional accuracy and can improve the injection yield, but it is generally not used much because the manufacturing cost of the mold is high. The current situation is that it is not being used.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明の目的は、鋳型製作費が比較的低廉であり、鋳造
欠陥ケ減少し、かつ寸法精度χ向上し得る金型鋳造法馨
提供するにある。An object of the present invention is to provide a mold casting method that is relatively inexpensive in mold manufacturing cost, reduces casting defects, and improves dimensional accuracy χ.

〔問題点を解決するためり手段〕[Means for solving problems]

通気性χ有する焼結金型の周囲から減圧吸引しつつキャ
ビティ内に１４湯ヲ注入する金型鋳造法で゛ある。This is a mold casting method in which 14 hot water is injected into the cavity while vacuum suction is applied from the periphery of a sintered mold having air permeability χ.

〔実施例〕〔Example〕

以下本発明の実施例〉図面に基いて詳細に説明する。第
１図は本発明による金型鋳造法？実施する装置の縦断面
図である。Embodiments of the present invention will be described in detail below with reference to the drawings. Figure 1 shows the mold casting method according to the present invention? FIG.

焼結金型１を箱体２の内部に収納し、焼結金型１の０口
３に対応する部位に開口部を有する蓋４で密閉する。箱
体２は気体減圧源（図示せず）に通じるダクト５を有す
るもので、箱体２の内部χ負圧にした状態で焼結金型１
に溶−？注入するものである。The sintering mold 1 is housed inside a box 2 and sealed with a lid 4 having an opening at a portion corresponding to the 0 opening 3 of the sintering mold 1. The box body 2 has a duct 5 leading to a gas decompression source (not shown), and the sintering mold 1 is placed in a state where the internal pressure of the box body 2 is χ negative.
Dissolved in? It is injected.

〔発明の効果〕〔Effect of the invention〕

こσり様に負圧状態で溶＠を注入するため溶湯の湯廻り
がきわめて良好である。従って薄肉品でも不廻りなどの
鋳造欠陥を発生することはない。また厚肉品に対しては
溶湯から発生するガスは焼結金型１の外部に吸ぢ［排出
されるので、ガスに起因する欠陥防止にも著しい効果乞
有するものである。As the molten metal is injected under negative pressure, the molten metal flows extremely well. Therefore, even thin-walled products do not suffer from casting defects such as rounding. Furthermore, for thick-walled products, the gas generated from the molten metal is absorbed and discharged to the outside of the sintering mold 1, so it is extremely effective in preventing defects caused by the gas.

ざらに、焼結金型１は、プレス型で成形し焼成炉で焼結
することにより任意形状の型Ｚ製作し得るので、金型の
製作費が低廉である。In general, since the sintering mold 1 can be formed into a mold Z of any shape by molding with a press mold and sintering in a firing furnace, the manufacturing cost of the mold is low.

焼結金型１は全体が多孔質であるため、冷却孔、ベント
ホールなどｔ設ける必要もなく、きわめて経済的である
。Since the sintering mold 1 is entirely porous, there is no need to provide cooling holes, vent holes, etc., and it is extremely economical.

以上の説明で明らかなように、本発明による金型鋳造法
は寸法精度の向上、鋳造欠陥の防止など著しい効果ｔも
たらすものである。As is clear from the above description, the mold casting method according to the present invention brings about significant effects such as improved dimensional accuracy and prevention of casting defects.

【図面の簡単な説明】 第１図は本発明を実施する装置α）縦断面図である。 １：焼結金型、２：箱体、３：湯口 以　　上 代理人　弁理士　高　石　橋　馬 茅　／　図 ６０．５．２７ 手続補正書（方式］ 事件の表示 昭和５９年持許頓第１９８１８０　　号発”′）８称　
金型鋳造法 補正をする者 ｅｚ　　・ｓｏａ＋　　日立仝属昧式会社代ｈｅ河野　
典夫 代　　　理　　　　人BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional view of an apparatus α) for implementing the present invention. 1: Sintered mold, 2: Box body, 3: Yuguchi and above Agent Patent attorney Taka Ishibashi Umaya / Figure 60.5.27 Procedural amendment (method) Case indication 1980 Jikyoton No. 198180 Issue ``') 8th name
Person who corrects the mold casting method ez ・soa + Hitachi independent company representative he Kono
Norioyo Masato

Claims (1)

【特許請求の範囲】[Claims] 通気性を有する焼結金型の周囲から減圧吸引しつつキヤ
ビテイ内に溶湯を注入することを特徴とする金型鋳造法
。A mold casting method characterized by injecting molten metal into a cavity while vacuum suction is applied from around an air permeable sintered mold.
JP59198180A 1984-09-21 1984-09-21 Casting method for metallic pattern Pending JPS6174765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59198180A JPS6174765A (en) 1984-09-21 1984-09-21 Casting method for metallic pattern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59198180A JPS6174765A (en) 1984-09-21 1984-09-21 Casting method for metallic pattern

Publications (1)

Publication Number Publication Date
JPS6174765A true JPS6174765A (en) 1986-04-17

Family

ID=16386805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59198180A Pending JPS6174765A (en) 1984-09-21 1984-09-21 Casting method for metallic pattern

Country Status (1)

Country Link
JP (1) JPS6174765A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103658555A (en) * 2013-11-04 2014-03-26 铜陵市经纬流体科技有限公司 Dry sand negative-pressure cavity casting technology
CN104907493A (en) * 2015-06-01 2015-09-16 含山县恒翔机械制造有限公司 Preparation method of mini-car wheel hub outer cover
CN104907772A (en) * 2015-06-01 2015-09-16 含山县恒翔机械制造有限公司 Method for manufacturing cap surface of small-sized SUV (sports utility vehicle) fuel tank cap
CN105127371A (en) * 2015-09-29 2015-12-09 徐小华 Full-automatic forming secondary-accuracy mold and use method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103658555A (en) * 2013-11-04 2014-03-26 铜陵市经纬流体科技有限公司 Dry sand negative-pressure cavity casting technology
CN104907493A (en) * 2015-06-01 2015-09-16 含山县恒翔机械制造有限公司 Preparation method of mini-car wheel hub outer cover
CN104907772A (en) * 2015-06-01 2015-09-16 含山县恒翔机械制造有限公司 Method for manufacturing cap surface of small-sized SUV (sports utility vehicle) fuel tank cap
CN105127371A (en) * 2015-09-29 2015-12-09 徐小华 Full-automatic forming secondary-accuracy mold and use method

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