JPH0562023B2 - - Google Patents
Info
- Publication number
- JPH0562023B2 JPH0562023B2 JP14087785A JP14087785A JPH0562023B2 JP H0562023 B2 JPH0562023 B2 JP H0562023B2 JP 14087785 A JP14087785 A JP 14087785A JP 14087785 A JP14087785 A JP 14087785A JP H0562023 B2 JPH0562023 B2 JP H0562023B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- porous member
- mold
- product cavity
- casting
- 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 - Fee Related
Links
- 238000005266 casting Methods 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 208000015943 Coeliac disease Diseases 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は金型鋳造法に関し、特に金型により郭
定された製品キヤビテイ内に下方から溶湯を注入
し、製品キヤビテイ内の溶湯が凝固した後、残り
の未凝固溶湯を落下させる方式の低圧鋳造や吸引
鋳造等に好適な鋳造法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold casting method, and particularly to a method in which molten metal is injected from below into a product cavity defined by a mold, and the molten metal in the product cavity solidifies. The present invention also relates to a casting method suitable for low-pressure casting, suction casting, etc. in which the remaining unsolidified molten metal is dropped.
従来、金型鋳造、特に低圧鋳造のように金型に
より郭定された製品キヤビテイ内に下方の保持炉
からストーク等を介して溶湯を注湯する方式の鋳
造法においては、溶湯中あるいは溶湯表面に存在
する酸化物やゴミ（塵）等が製品キヤビテイ内に
混入しないようにすることが必要である。しかる
に、酸化物やゴミは溶湯に比べ比重が小さいた
め、一担ストーク内に導入されると、優先的に製
品キヤビテイ内まで導かれる結果となり、鋳物品
質の低下をもたらす。そこで、従来はかかる酸化
物やゴミの製品キヤビテイ内への侵入を阻止する
と共に、湯流れの整流を目的として、方案部、例
えば湯口部近傍に金網を取り付けることがあつ
た。
Conventionally, in mold casting, especially low-pressure casting, in which molten metal is poured into a product cavity defined by a mold from a lower holding furnace through a stalk, etc., It is necessary to prevent oxides, dirt (dust), etc. present in the product from entering the product cavity. However, since oxides and dust have a lower specific gravity than the molten metal, once they are introduced into the stoke, they are preferentially guided into the product cavity, resulting in a deterioration in the quality of the casting. Therefore, in the past, a wire mesh was attached to the planar part, for example, near the sprue part, in order to prevent such oxides and dirt from entering the product cavity and to rectify the flow of the molten metal.
しかしながら、この金網は溶湯の凝固に伴つて
鋳造粗材と一体となるため、鋳造毎に金網を設置
する必要がある。従つて、多くの金網を必要とす
るばかりか、金網設置作業に時間が掛かるという
問題がある。また、金網設置作業は高温下で行う
ため作業環境も好ましくない。また、金網を採り
付ける際に、金型面に塗布されている塗型材を傷
付けることがある。更に、湯口部や湯道部等の方
案部を溶解して再利用する際、溶湯がアルミニウ
ム合金等の軽金属の場合には、溶湯中の鉄分が高
くなり鋳物粗材の品質が低下するので、予め取り
除く必要があつた。
However, since this wire mesh becomes integrated with the casting material as the molten metal solidifies, it is necessary to install the wire mesh every time casting is performed. Therefore, there is a problem that not only a large number of wire meshes are required, but also the wire mesh installation work takes time. Furthermore, since the wire mesh installation work is carried out under high temperatures, the working environment is not favorable. Furthermore, when attaching the wire mesh, the coating material applied to the mold surface may be damaged. Furthermore, when melting and reusing design parts such as sprues and runners, if the molten metal is a light metal such as an aluminum alloy, the iron content in the molten metal will be high and the quality of the casting material will deteriorate. It was necessary to remove it beforehand.
そこで、金型鋳造法において、酸化物やゴミ除
去用の金網を繰り返し使用できる工夫が望まれて
いた。 Therefore, in the mold casting method, it has been desired to develop a method that allows the wire mesh for removing oxides and dust to be used repeatedly.
上記問題は、次に述べる本発明の金型鋳造法に
よつて解決される。
The above problem is solved by the mold casting method of the present invention described below.
即ち、本発明の金型鋳造法は、金型により郭定
された製品キヤビテイ内に下方から溶湯を注入
し、製品キヤビテイ内の溶湯が凝固した後、残り
の未凝固溶湯を落下させる方式の金型鋳造法にお
いて、製品キヤビテイへ通じる湯口部近傍に酸化
物等の除去用多孔質部材が設置された金型鋳造法
であつて、
前記多孔質部材は発熱体からなり、鋳造開始か
ら製品キヤビデイ内の溶湯が凝固するまでの間、
この多孔質部材に通電することを特徴としてい
る。 That is, the mold casting method of the present invention is a method in which molten metal is injected from below into a product cavity defined by a mold, and after the molten metal in the product cavity has solidified, the remaining unsolidified molten metal is dropped. In the mold casting method, a porous member for removing oxides, etc. is installed near the sprue leading to the product cavity, and the porous member consists of a heating element, and the porous member is installed in the product cavity from the start of casting. Until the molten metal solidifies,
The feature is that this porous member is energized.
本発明において使用する多孔質部材は、耐熱
性、耐食性に優れ、かつ通電により発熱する物質
からなることが必要であり、例えばタングステ
ン、モリブテン等を用いることができる。 The porous member used in the present invention needs to be made of a substance that has excellent heat resistance and corrosion resistance and generates heat when energized, and for example, tungsten, molybdenum, etc. can be used.
この多孔質部材としては、金網やパンチングメ
タル等を用いることができる。これらの多孔質部
材は、金型に設置する場合にはこの多孔質部材の
周囲をセラミツクス等の絶縁体で覆う必要があ
る。 A wire mesh, punched metal, or the like can be used as this porous member. When these porous members are installed in a mold, it is necessary to cover the periphery of the porous member with an insulator such as ceramics.
また、溶湯に対する耐食性を向上させるため、
多孔質部材の表面にセラミツクスを溶射してもよ
い。 In addition, to improve corrosion resistance against molten metal,
Ceramics may be thermally sprayed onto the surface of the porous member.
多孔質部材の大きさは、設置する溶湯の通路を
完全に覆えるものであればよく、形状は円形でも
矩形でもよい。 The size of the porous member may be such that it can completely cover the passage of the molten metal to be installed, and the shape may be circular or rectangular.
本発明の金型鋳造法によれば、鋳造時、多孔質
部材に通電するため、多孔質部材は通電中発熱し
ている。このため、多孔質部材近傍の溶湯は常に
溶融状態にあり、製品キヤビテイ内の溶湯が凝固
するまで十分な押湯効果を与えることができる。
また、製品キヤビテイ内の溶湯凝固後、溶湯への
加圧を中止すると、多孔質部材近傍より下方の溶
湯は保持炉等に落下し、多孔質部材より上方の凝
固した方案部と製品部は一体となつて離型され
る。従つて、多孔質部材はそのままの状態で再度
使用することができる。この結果、鋳造毎に多孔
質部材を設置する必要がなくなり、塗型材の損傷
も防止でき、更に方案部の再生処理も容易とな
る。
According to the mold casting method of the present invention, since the porous member is energized during casting, the porous member generates heat during the energization. Therefore, the molten metal in the vicinity of the porous member is always in a molten state, and a sufficient feeder effect can be provided until the molten metal in the product cavity solidifies.
Furthermore, if the pressurization of the molten metal is stopped after the molten metal has solidified in the product cavity, the molten metal below the vicinity of the porous member will fall into a holding furnace, etc., and the solidified section above the porous member and the product part will be integrated. The mold is released. Therefore, the porous member can be used again as it is. As a result, there is no need to install a porous member for each casting, damage to the coating material can be prevented, and furthermore, the reprocessing of the patterned part becomes easy.
次に、本発明の実施例を図面を参考にして説明
する。
Next, embodiments of the present invention will be described with reference to the drawings.
本実施例は本発明を低圧鋳造法に適用した例を
示す。 This example shows an example in which the present invention is applied to a low pressure casting method.
ここで、第１図は本発明の実施例に係る低圧鋳
造法の一工程を示す概略構成図、第２図は第１図
のＡ部拡大図、第３図は第２図をＢ方向から見た
矢視図、第４図は本発明の実施例で使用した金網
を示す平面図である。 Here, FIG. 1 is a schematic configuration diagram showing one step of the low-pressure casting method according to an embodiment of the present invention, FIG. 2 is an enlarged view of part A in FIG. 1, and FIG. 3 is a view of FIG. 2 from direction B. FIG. 4 is a plan view showing the wire mesh used in the embodiment of the present invention.
第１図において、１は保持炉であり、るつぼ２
を保持している。このるつぼ２内にはアルミニウ
ム合金溶湯（以下、単に溶湯という）３が保持さ
れている。るつぼ２の上部には、ダイベースを兼
ねる炉蓋４が置かれており、このるつぼ２と炉蓋
４により実質的に密閉空間が形成される。この炉
蓋４の中央には、ストーク５を挿入、支持するた
めの段付き穴６が設けられており、また保持炉１
内を加圧したり、保持炉１内の排気を行う吸排気
孔７が形成されている。そして、この吸排気孔７
は図示しない加圧ガス供給手段と接続されてい
る。 In Fig. 1, 1 is a holding furnace, and a crucible 2
is held. A molten aluminum alloy (hereinafter simply referred to as molten metal) 3 is held within this crucible 2 . A furnace lid 4 that also serves as a die base is placed above the crucible 2, and the crucible 2 and the furnace lid 4 form a substantially sealed space. A stepped hole 6 for inserting and supporting a stalk 5 is provided in the center of the furnace lid 4, and a holding furnace 1
Intake and exhaust holes 7 are formed to pressurize the inside of the holding furnace 1 and to exhaust the inside of the holding furnace 1 . And this intake and exhaust hole 7
is connected to pressurized gas supply means (not shown).
炉蓋４の上部には、金型８が載置されている。
この金型８は、上型９と下型１０からなり、この
上型９と下型１０により製品キヤビテイ１１が郭
定される。また、下型１０の下部にはリング部材
１２が設けられており、ストーク５を炉蓋４に押
圧、固定している。一部を炉蓋４に固定されたス
トーク５の他端は、炉内の底部近くまで延在して
設けられている。このストーク５は、通常フラン
ジ付き円筒形状とされる。 A mold 8 is placed on the top of the furnace lid 4.
This mold 8 consists of an upper mold 9 and a lower mold 10, and a product cavity 11 is defined by the upper mold 9 and the lower mold 10. Further, a ring member 12 is provided at the lower part of the lower mold 10, and presses and fixes the stalk 5 to the furnace lid 4. The other end of the stalk 5, which is partially fixed to the furnace lid 4, is provided to extend to near the bottom of the furnace. This stalk 5 usually has a cylindrical shape with a flange.
また、下型１０の下部の湯口部には、第１図〜
第３図に示すように、多孔質部材としての金網１
３が配設されている。この金網１３は、周囲をセ
ラミツクスからなる絶縁体１４で保護されてお
り、一対のリード線１５によりスイツチ１６を介
して電源１７と接続されている。 In addition, in the sprue section at the bottom of the lower mold 10, there are shown in FIG.
As shown in FIG. 3, wire mesh 1 as a porous member
3 are arranged. The wire mesh 13 is surrounded by an insulator 14 made of ceramics, and is connected to a power source 17 via a switch 16 by a pair of lead wires 15.
次に、作動を説明する。 Next, the operation will be explained.
まず、型締めして製品キヤビテイ１１を郭定し
た後、図示しない加圧ガス供給手段から吸排気孔
７を介して炉内に圧縮エアを吹き込む。すると、
炉内の溶湯３は加圧されてストーク５を介して製
品キヤビテイ１１内に注入される。この加圧と相
前後して、電源１７のスイツチ１６を入れ金網１
３に通電する。製品キヤビテイ１１内の溶湯が凝
固した後、吸排気孔７から排気を行うと共に、ス
イツチ１６を切つて通電を中止する。この結果、
ストーク５内に溶湯３は保持炉１内に落下する。
続いて、通常の方法で離型を行い、製品（鋳物）
を取り出す。 First, after the mold is clamped to define the product cavity 11, compressed air is blown into the furnace from a pressurized gas supply means (not shown) through the intake and exhaust holes 7. Then,
The molten metal 3 in the furnace is pressurized and injected into the product cavity 11 via the stalk 5. Around the same time as this pressurization, turn on the switch 16 of the power supply 17 and
3 is energized. After the molten metal in the product cavity 11 has solidified, the air is exhausted from the intake/exhaust hole 7, and the switch 16 is turned off to stop energization. As a result,
The molten metal 3 falls into the stoke 5 and into the holding furnace 1.
Next, the mold is released in the usual way, and the product (casting) is released.
Take out.
本実施例においては、金網１３を介して製品部
等の凝固部と未凝固溶湯が分離されるため、金網
１３はそのまま何度でも使用することができる。 In this embodiment, since the solidified part such as the product part and the unsolidified molten metal are separated through the wire mesh 13, the wire mesh 13 can be used as many times as is.
また、得られた鋳物（製品）は引け巣等の鋳造
欠陥のない健全なものであつた。 Furthermore, the obtained casting (product) was sound and free from casting defects such as shrinkage cavities.
以上、本発明の特定の実施例について説明した
が、本発明は上記実施例に限定されるものではな
く、特許請求の範囲内において種々の実施態様を
包含するものである。 Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, but includes various embodiments within the scope of the claims.
例えば、実施例では多孔質部材として金網を用
いた例を示したが、この多孔質部材としては第５
図、第６図に示すように、一体式としたり、発熱
面積を大きくするためにコイル状に巻いたものを
使用してもよい。 For example, in the example, an example was shown in which a wire mesh was used as the porous member.
As shown in FIG. 6, an integral type may be used, or a coiled type may be used to increase the heat generating area.
以上より、本発明の金型鋳造法によれば、以下
の効果を奏する。
As described above, according to the mold casting method of the present invention, the following effects are achieved.
(イ) 多孔質部材を繰り返し使用することができ
る。このため、従来のように鋳造毎に金網を設
置する必要がないため、塗型材の損傷を防止で
き、多孔質部材を設置するのに要する時間分だ
け鋳造サイクルを短縮できる。また、多孔質部
材を設置する高温作業がほとんどなくなるため
作業性が改善される。(a) Porous members can be used repeatedly. Therefore, it is not necessary to install a wire gauze for each casting as in the conventional method, so damage to the coating material can be prevented and the casting cycle can be shortened by the time required to install the porous member. In addition, workability is improved because high-temperature work for installing the porous member is almost eliminated.
(ロ) 鋳造時、多孔質部材に通電するため、多孔質
部材近傍の溶湯は溶融状態にあり、製品キヤビ
テイ内に十分な押湯効果を与えることができ
る。このため、引け巣等の鋳造欠陥が低減さ
れ、鋳物品質の向上が図れる。(b) During casting, since electricity is applied to the porous member, the molten metal in the vicinity of the porous member is in a molten state, and a sufficient feeder effect can be provided within the product cavity. Therefore, casting defects such as shrinkage cavities are reduced, and the quality of the casting can be improved.
(ハ) 多孔質部材近傍で製品部と方案部が分かれる
ため、後処理が容易になると共に、歩留りが向
上する。また、多孔質部材は方案部と共に凝固
しないため、方案部を再度溶解して再利用する
際の溶湯処理が容易となる。(c) Since the product part and the design part are separated near the porous member, post-processing becomes easier and the yield is improved. In addition, since the porous member does not solidify together with the pattern part, the molten metal treatment when the pattern part is melted again and reused becomes easy.
第１図は本発明の実施例に係る低圧鋳造法の一
工程を示す概略構成図、第２図は第１図のＡ部拡
大図、第３図は第２図をＢ方向から見た矢視図、
第４図は本発明の実施例で使用した金網を示す平
面図である。第５図は本発明に使用する多孔質部
材の他の例を示す平面図、第６図は本発明に使用
する多孔質部材の更に他の例を示す平面図であ
る。
１……保持炉、２……るつぼ、３……溶湯、４
……炉蓋、５……ストーク、６……段付き穴、７
……吸排気孔、８……金型、９……上型、１０…
…下型、１１……製品キヤビテイ、１２……リン
グ部材、１３……金網（多孔質部材）、１４……
絶縁体、１５……リード線、１６……スイツチ、
１７……電源。
FIG. 1 is a schematic configuration diagram showing one step of the low-pressure casting method according to the embodiment of the present invention, FIG. 2 is an enlarged view of part A in FIG. 1, and FIG. visual view,
FIG. 4 is a plan view showing the wire mesh used in the embodiment of the present invention. FIG. 5 is a plan view showing another example of the porous member used in the present invention, and FIG. 6 is a plan view showing still another example of the porous member used in the present invention. 1... Holding furnace, 2... Crucible, 3... Molten metal, 4
... Furnace lid, 5 ... Stoke, 6 ... Stepped hole, 7
...Intake/exhaust hole, 8...Mold, 9...Upper mold, 10...
... lower mold, 11 ... product cavity, 12 ... ring member, 13 ... wire mesh (porous member), 14 ...
Insulator, 15...Lead wire, 16...Switch,
17...Power supply.
Claims (1)
方から溶湯を注入し、製品キヤビテイ内の溶湯が
凝固した後、残りの未凝固溶湯を落下させる方式
の金型鋳造法において、製品キヤビテイへ通じる
湯口部近傍に酸化物等の除去用多孔質部材が設置
された金型鋳造法であつて、 前記多孔質部材は発熱体からなり、鋳造開始か
ら製品キヤビテイ内の溶湯が凝固するまでの間、
この多孔質部材に通電することを特徴とする金型
鋳造法。[Scope of Claims] 1. In a mold casting method in which molten metal is injected from below into a product cavity defined by a mold, and after the molten metal in the product cavity has solidified, the remaining unsolidified molten metal is dropped. , a mold casting method in which a porous member for removing oxides, etc. is installed near the sprue leading to the product cavity, and the porous member consists of a heating element, and the molten metal in the product cavity solidifies from the start of casting. Until then,
A mold casting method characterized by energizing this porous member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14087785A JPS6289560A (en) | 1985-06-27 | 1985-06-27 | Die casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14087785A JPS6289560A (en) | 1985-06-27 | 1985-06-27 | Die casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6289560A JPS6289560A (en) | 1987-04-24 |
| JPH0562023B2 true JPH0562023B2 (en) | 1993-09-07 |
Family
ID=15278836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14087785A Granted JPS6289560A (en) | 1985-06-27 | 1985-06-27 | Die casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6289560A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU601315B2 (en) * | 1988-01-30 | 1990-09-06 | Foseco International Limited | Moulds for metal casting and sleeves containing filters for use therein |
| JPH034357U (en) * | 1989-06-02 | 1991-01-17 | ||
| CN106807919B (en) * | 2015-11-27 | 2019-04-05 | 冯志军 | A kind of dedicated unit manufacturing semi-solid light alloy casting low pressure casting one-step method |
-
1985
- 1985-06-27 JP JP14087785A patent/JPS6289560A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6289560A (en) | 1987-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4811778A (en) | Method of manufacturing a metal article by the lost wax casting process | |
| US5505250A (en) | Investment casting | |
| HUP9900874A2 (en) | Method for joining structural components | |
| JPS6289560A (en) | Die casting method | |
| JPS59191542A (en) | Investment casting method | |
| SE7508782L (en) | KIT AND DEVICE FOR BIMETALLIC CASTING WITHOUT ESSENTIAL METALLURGIC BOND | |
| JPS60170567A (en) | Method for casting under cooling with water mist | |
| JP2540619B2 (en) | Operation method of molten metal pressure feeding and holding furnace | |
| JPH0327721Y2 (en) | ||
| JPH084204Y2 (en) | Low pressure casting equipment | |
| JPS63264243A (en) | Mold for casting sublimation pattern | |
| JPH06179045A (en) | Casting die | |
| JP3040776B1 (en) | Support method for cast-in material | |
| JPH0335865A (en) | Method and apparatus for precision casting | |
| CN213437024U (en) | Be applied to as cast shape mould support of preapring for an unfavorable turn of events of disappearance mould | |
| JPH03165949A (en) | Tree mold for lost wax process and casting method | |
| JPH0310814A (en) | Mold and its manufacture | |
| JP3270856B2 (en) | Manufacturing method of phase plug for speaker | |
| RU97114167A (en) | METHOD FOR PRODUCING CASTINGS | |
| JPH0523823A (en) | Stoke for differential pressure casting | |
| JP2836327B2 (en) | Low pressure casting method | |
| JP3281314B2 (en) | Precision casting mold | |
| JPH064999Y2 (en) | Reticulated filter structure | |
| JPH11244995A (en) | Bonding method of vanishing model | |
| JPH0120043Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |