JPH0252583B2 - - Google Patents
Info
- Publication number
- JPH0252583B2 JPH0252583B2 JP7112583A JP7112583A JPH0252583B2 JP H0252583 B2 JPH0252583 B2 JP H0252583B2 JP 7112583 A JP7112583 A JP 7112583A JP 7112583 A JP7112583 A JP 7112583A JP H0252583 B2 JPH0252583 B2 JP H0252583B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- crucible
- pressure
- convex
- tubular body
- 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 31
- 239000000463 material Substances 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000788 chromium alloy Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 229910052845 zircon Inorganic materials 0.000 description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000005388 borosilicate glass Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【発明の詳細な説明】
この発明は減圧ふんい気または不活性ガスふん
い気あるいは大気圧中において高周波誘導加熱に
よつて溶解した金属を同じふんい気状態におかれ
ている鋳型に鋳込んで、歯科用あるいは工業用小
型精密鋳物を製造する高周波溶解加圧鋳造装置に
関するものである。[Detailed Description of the Invention] This invention involves casting metal melted by high-frequency induction heating in a vacuum atmosphere, inert gas atmosphere, or atmospheric pressure into a mold placed in the same atmosphere. The present invention relates to a high-frequency melting and pressure casting apparatus for manufacturing small precision castings for dental or industrial use.
従来歯科補綴材料としてすぐれた特性を有する
金または銀合金、ニツケル−クロム合金、コバル
ト−クロム合金などの高融点合金の鋳造に用いら
れる高周波鋳造装置のうち連続加圧鋳造方式をと
つた装置は遠心鋳造を含む別皿溶解鋳造方式の装
置に比して鋳造した製品の結晶粒子が細かく、デ
ンドライトの形状が不定形で、しかもその成長方
向が不規則で方向性がなく、かつ鋳肌表面がなめ
らかであり、歯科用鋳造装置として広く用いられ
ている。第１図は上記従来の連続加圧鋳造装置の
１例についてその要部を示す縦断面図である。凸
状鋳型１はルツボ部２と、ロストワツクス法にて
造型した精密鋳型３およば湯口４とをたとえば燐
酸塩系埋没材６によつて１体に成型したもので、
その上部突出部すなわちルツボ部２は石英ガラス
にて形成された筒状体７の内部すなわち加熱室７
Ｒに収容され、かつ、凸状鋳型下部基部すなわち
上記３，４を含む部分８は鋳型受台９上にアスベ
ストリング１０を介して支承されている。この鋳
型受台９はたとえば圧縮ばね１２または図示しな
い空気圧シリンダピストンによつて下方から予め
設定された圧力Puにて押上げられ、上記鋳型下
部基台８をアスベストパツキング１３を介してア
スベスト成形材にてなる上面蓋１４に圧接する。
上面蓋１４は、装置基台１５と係合する金属材に
てなる環状蓋１６と気密に結合されているので上
記加熱室７Ｒは上記鋳型受台９のある大気開放部
１７に対し気密に分離される。ただし、鋳型基部
８の周辺をたとえば10-2〜10-3Torr位まで減圧
しさらに１Kg／cm-2G位のアルゴンなどの不活性
ガスを置換することによつて注湯の効率を向上さ
せた場合は点線で示す。下室筐体１８を設けパツ
キング１９を介して上記環状蓋１６に圧接し、か
つ矢印で示す、排気管・ガス導入出管２０，２１
によつて下室内部２２を上記加熱室７Ｒとは分離
した状態で独自に減圧およびガス置換を行うので
ある。上記加熱室７Ｒの周囲には高周波誘導加熱
コイル２３が巻き回してあり、さらに加熱室７Ｒ
の上端部を密封する覗き窓２４を設けるとともに
加熱室７Ｒを上記と同じく10-2〜10-3Torr位に
減圧する真空吸引管２５および約５Kg／cm2Ｇの圧
力をもつ加圧用アルゴンガスなどの圧力源を導入
出するガス導管２６を設けている。以上が従来の
高周波溶解加圧鋳造装置の鋳造部分の構成であ
り、鋳型圧接機構はこの発明に直接関係がないの
で図示ならびに説明を省略している。 Among high-frequency casting machines conventionally used for casting high-melting point alloys such as gold or silver alloys, nickel-chromium alloys, and cobalt-chromium alloys that have excellent properties as dental prosthetic materials, centrifugal casting machines employ continuous pressure casting methods. Compared to separate dish melting and casting equipment, the crystal grains of the cast product are finer, the shape of the dendrites is irregular, and their growth direction is irregular and non-directional, and the casting surface is smooth. It is widely used as a dental casting device. FIG. 1 is a longitudinal cross-sectional view showing the essential parts of an example of the conventional continuous pressure casting apparatus described above. The convex mold 1 is made by molding a crucible part 2, a precision mold 3 and a sprue 4 formed by the lost wax method into one body using, for example, a phosphate-based investment material 6,
The upper protruding part, that is, the crucible part 2 is inside the cylindrical body 7 formed of quartz glass, that is, the heating chamber 7.
A portion 8 accommodated in R and including the convex mold lower base, ie, the above-mentioned 3 and 4, is supported on a mold holder 9 via an asbestos ring 10. This mold holder 9 is pushed up from below at a preset pressure P u by a compression spring 12 or a pneumatic cylinder piston (not shown), and the mold lower base 8 is molded with asbestos through an asbestos packing 13. It is pressed against the top lid 14 made of material.
The top lid 14 is airtightly connected to an annular lid 16 made of a metal material that engages with the device base 15, so that the heating chamber 7R is airtightly separated from the atmosphere opening part 17 where the mold holder 9 is located. be done. However, the efficiency of pouring can be improved by reducing the pressure around the mold base 8 to, for example, 10 -2 to 10 -3 Torr and replacing it with an inert gas such as argon of about 1 kg/cm -2 G. The case is indicated by a dotted line. A lower chamber casing 18 is provided and is in pressure contact with the annular lid 16 through a packing 19, and exhaust pipes/gas inlet/outlet pipes 20, 21 are shown by arrows.
As a result, the lower chamber interior 22 is independently depressurized and gas replaced while being separated from the heating chamber 7R. A high frequency induction heating coil 23 is wound around the heating chamber 7R.
A viewing window 24 is provided to seal the upper end, and a vacuum suction tube 25 is provided to reduce the pressure in the heating chamber 7R to approximately 10 -2 to 10 -3 Torr as described above, and a pressurizing argon gas having a pressure of approximately 5 kg/cm 2 G is provided. A gas conduit 26 is provided for introducing and discharging a pressure source such as. The above is the configuration of the casting part of the conventional high-frequency melting and pressure casting apparatus, and since the mold pressure welding mechanism is not directly related to the present invention, illustration and description thereof are omitted.
ところで、従来装置における上記凸状鋳型１は
前述したように燐酸塩系または石膏などの埋没材
６によつて一体的に成型されているのが通常であ
り、前者の埋没材のように硬化時における圧縮強
度が約140Kg／cm2というように大きい素材のばあ
いは鋳型成型が容易であり、凸状鋳型のルツボ部
２を大きく（上部突出部を高く）しても成型可能
ではあるが、この燐酸塩系埋没材はそれを融解す
べき金属がニツケル−クロム合金またはコバルト
−クロム合金にほぼ限定せられる欠点がある。後
者の石膏埋没材は上記圧縮強度が上記のものの約
１／３で脆弱であり、ルツボ部を大きく成形するこ
とが困難である欠点がある。また金や銀の合金を
融解鋳造するに適する珪酸の準安定結晶形である
クリストバライト系埋没材と、チタンやチタン合
金の融解に不可欠のマグネシヤまたはジルコンを
主成分とした高融点埋没材とにおいては、前者
は、低い焼成温度で硬化するが硬化時の圧縮強度
がきわめて低く、また後者は高い焼成温度を要し
かつ硬化後の硬度は高いが、ともに崩れ易く、第
１図で示したようなルツボ周壁のような薄肉部を
有する複雑な形状の凸状鋳型を容易に成形するこ
とができない欠点がある。 By the way, as mentioned above, the convex mold 1 in the conventional device is usually integrally molded with the investment material 6 such as phosphate or gypsum, and like the former investment material, it does not harden during hardening. In the case of a material with a high compressive strength of about 140 kg/cm 2 , molding is easy, and molding is possible even if the crucible part 2 of the convex mold is made larger (the upper protrusion part is made higher). This phosphate-based investment material has the disadvantage that the metal to be melted is almost limited to nickel-chromium alloys or cobalt-chromium alloys. The latter type of gypsum investment material has a compressive strength that is about 1/3 of the above-mentioned material and is fragile, and has the disadvantage that it is difficult to form a large crucible portion. In addition, cristobalite-based investment materials, which are metastable crystal forms of silicic acid suitable for melting and casting gold and silver alloys, and high-melting-point investment materials mainly composed of magnesia or zircon, which are essential for melting titanium and titanium alloys. The former hardens at a low firing temperature, but has extremely low compressive strength during hardening, while the latter requires a high firing temperature and has high hardness after hardening, but both crumble easily, as shown in Figure 1. There is a drawback that a convex mold having a complicated shape having a thin wall portion such as a crucible peripheral wall cannot be easily formed.
この発明は以上の現況に鑑みてなされたもので
歯科補綴材料に用いられる貴金属から非金属まで
の広い範囲にわたる融解材料にそれぞれ対応して
用いられる燐酸塩系・石膏・クリストバライト
系・マグネシヤまたはジルコン系のいずれの埋没
材にしても容易に焼成成型しうる簡単な形状の鋳
型基台の上部突出部にルツボの底部だけを形成す
るとともに、その鋳型埋没材を同等あるいはそれ
以上の耐火性を有するたとえば石英やほうけい酸
ガラスなどの筒状部材を、上記ルツボ底部に載せ
ることによつてルツボ部を形成した複合型凸状鋳
型を鋳型としたことを特徴とする高周波溶解加圧
鋳造装置にかかるものであり、この構成によつて
広い範囲の融解金属に対応した各種埋没材の鋳型
の焼成成型を容易化し、かつルツボ部の容量を増
すことで鋳造能力を向上するとともに、ルツボの
筒状体の繰返し使用を可能として鋳造コストの低
減が図れる便宜な装置を提供しようとするもので
ある。 This invention was made in view of the above-mentioned current situation, and is applicable to a wide range of molten materials from precious metals to non-metals used in dental prosthetic materials. Phosphate, gypsum, cristobalite, magnesia or zircon materials The bottom of the crucible is formed only on the upper protrusion of the mold base, which has a simple shape that can be easily fired and molded, and the mold investment material can be made of any of the following materials: A high-frequency melting and pressure casting apparatus characterized in that the mold is a composite convex mold in which a crucible part is formed by placing a cylindrical member such as quartz or borosilicate glass on the bottom part of the crucible. This configuration facilitates the firing and molding of various types of investment material molds that can accommodate a wide range of molten metals, and improves casting capacity by increasing the capacity of the crucible. The purpose is to provide a convenient device that can be used repeatedly and reduce casting costs.
以下図面によつてこの発明の実施例を説明す
る。第２図はこの発明の実施例高周波溶解加圧鋳
造装置の鋳型部の部分側断面図であり、第１図と
同記号のものは詳説を省く。凸状鋳型３０は従来
のもの（第１図の１）と異なり、埋没材６にて形
成した精密鋳型部３と湯口４とを含む鋳型基台３
１はその上部突出部３２の上記基部３１上面から
の高さｈを加熱室外周にたとえば７〜10ターン巻
き回わされた高周波加熱誘導コイル２３の全長ｌ
の約1/2位とし、その上端にたとえば漏斗状のル
ツボ底部３３を形成している。これは、高周波加
熱誘導コイル２３全長ｌの中央部がその加熱効率
がもつとも良く、高温となり、融解はその部分か
ら起るからである。つぎに上記漏斗状底部３３の
周縁に設けた同心円状はめ合い部３４すなわち環
状平面ならびにその平面を囲む障壁とからなる部
分に上方から載せるようにしてはまり合う短管状
体３５はたとえば肉厚約1.5mm位の耐火材料で成
型されている。この耐火材は耐熱性がすぐれかつ
温度の急変にも耐えるほうけい酸ガラスまたは耐
火性セラミツクスなどの耐火性円筒材である。上
記鋳型基部３１と短管状体３５の結合は上記した
ように単に所定の位置に載せるだけで何ら特別な
接合手段又は融解金属の漏れ封止手段を要せず、
これがこの発明の複合式鋳型の大きい特徴であ
る。これは加圧鋳造法として第１図で説明したた
とえば５Kg／cm2Ｇの圧力Pdを有するアルゴンガ
スが融解金属３６を加圧する際、その同一圧力
Pdのガスは短管状体３５の外壁にも同じく作用
するため湯漏れが生じないのである。さらに鋳造
完了後、短管状体３５はその膨張係数のちがいに
よつて融解金属３６を完全に剥離するので、反覆
再使用が可能である。図において鋳型受台９と係
合する３７は図示しない鋳型受台上下駆動機構と
してたとえばエアーシリンダのピストンロツド３
８上部の自在接手である。上記エアーシリンダの
押上げ圧力Puは鋳型基台３１上面の耐熱性パツ
キング１３を上面蓋１４に圧接し、上記鋳造加圧
力Pdに対抗して気密を保つ構成は従来装置と同
一である。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a partial side sectional view of the mold section of the high-frequency melting and pressure casting apparatus according to the embodiment of the present invention, and parts with the same symbols as those in FIG. 1 will not be described in detail. The convex mold 30 differs from the conventional mold (1 in FIG. 1) in that it has a mold base 3 including a precision mold part 3 formed of investment material 6 and a sprue 4.
1 is the height h of the upper protrusion 32 from the top surface of the base 31, and the total length l of the high-frequency heating induction coil 23 wound, for example, 7 to 10 turns around the outer periphery of the heating chamber.
For example, a funnel-shaped crucible bottom 33 is formed at the upper end of the crucible. This is because the central part of the entire length l of the high-frequency heating induction coil 23 has good heating efficiency, reaches a high temperature, and melting occurs from that part. Next, a short tubular body 35 that fits from above into a concentric fitting part 34 provided on the periphery of the funnel-shaped bottom part 33, that is, a part consisting of an annular plane and a barrier surrounding the plane, has a wall thickness of, for example, about 1.5 mm. It is molded from a fire-resistant material of about mm. This refractory material is a refractory cylindrical material such as borosilicate glass or refractory ceramics that has excellent heat resistance and can withstand sudden changes in temperature. As described above, the mold base 31 and the short tubular body 35 can be connected by simply placing them in a predetermined position, without requiring any special joining means or leakage sealing means for molten metal.
This is a major feature of the composite mold of this invention. This is the pressure casting method explained in FIG .
Since the P d gas also acts on the outer wall of the short tubular body 35, no hot water leaks. Further, after completion of casting, the short tubular body 35 completely peels off the molten metal 36 due to the difference in its expansion coefficient, so that it can be reused repeatedly. In the figure, 37 that engages with the mold holder 9 is a mold holder vertical drive mechanism (not shown), for example, a piston rod 3 of an air cylinder.
8. It is a universal joint on the top. The push-up pressure P u of the air cylinder presses the heat-resistant packing 13 on the upper surface of the mold base 31 against the upper lid 14, and the construction to maintain airtightness against the casting pressure P d is the same as that of the conventional device.
つぎに第３図によつてこの発明の実施例装置に
用いる凸状鋳型の別の実施例を説明する。図にお
いて、第１、第２図と同記号のものは詳説を省
く。従来の鋳造装置において鋳型の外径部に金属
リングを使用することは公知であるが、この実施
例のように凸状鋳型３０の鋳型基部外周３１に金
属リング３９を使用するのは新しい試みであり、
従来高周波コイルの比較的近辺にこのような金属
リングを位置させること自体が問題とされていた
ことに対し、電気的ロスのないことを実験的に確
認したことによつて成型ならびに焼成硬化後の鋳
型基部３１の脆性破壊や欠落などを容易に防止す
るだけでなく、たとえばマグネシヤまたはジルコ
ンなどを成分とする埋没材を完全硬化の1350℃ま
で焼成しなくても鋳型として使用でき、かつ鋳造
後の製品取外しが著しく容易となる。 Next, another embodiment of the convex mold used in the embodiment apparatus of the present invention will be explained with reference to FIG. In the figures, those with the same symbols as in Figures 1 and 2 will not be described in detail. Although it is known that a metal ring is used on the outer diameter of the mold in conventional casting equipment, using the metal ring 39 on the outer circumference 31 of the mold base of the convex mold 30 as in this embodiment is a new attempt. can be,
Conventionally, placing such a metal ring relatively close to the high-frequency coil itself was considered a problem, but by experimentally confirming that there is no electrical loss, Not only does it easily prevent brittle fracture or chipping of the mold base 31, but it also allows investment materials containing magnesia or zircon to be used as molds without having to be fired to a fully hardened temperature of 1350°C, and Product removal becomes significantly easier.
以上がこの発明の実施例であるが、この発明は
図示や説明に限定されるものでないことはいうま
でもない。たとえば鋳型埋没材や短管状体の材料
も説明した以外のものでもよく、鋳造装置の鋳造
部の構造も図示に限定されず連続加圧鋳造方式の
あればどのようなものでもよい。もちろん鋳型圧
接機構も加熱室固定式に限らず加熱室がその隔壁
とともに上方から下降する可動式のものでもよ
く、さらにその圧接力源は空気圧やスプリングに
限定されるものではない。 Although the embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the illustrations and descriptions. For example, the materials for the mold investment material and the short tubular body may be other than those described above, and the structure of the casting section of the casting apparatus is not limited to that shown in the drawings, but may be of any type as long as it is a continuous pressure casting method. Of course, the mold pressing mechanism is not limited to a fixed heating chamber type, but may be a movable type in which the heating chamber descends from above together with its partition wall, and the pressing force source is not limited to air pressure or a spring.
この発明は以上のように構成されているので従
来の高周波溶解加圧鋳造装置の欠点とくに鋳型の
作成が困難であつた点を改良し、従来耐火性埋没
材によつて一体的に形成した凸状鋳型を成型容易
な鋳型基部とルツボ部とを別々に形成し、これを
結合して凸状鋳型を形成するという新しい構想に
よつて各種の埋没材を容易に成型し、その鋳造量
を自在に増加し、鋳型能率を向上し、かつ上記ル
ツボ部の耐火性短管状体が反覆再使用できるため
に、鋳型作成コストの低減が図れる便宜な装置を
提供しえたものである。 This invention is constructed as described above, and it improves the drawbacks of the conventional high-frequency melting and pressure casting equipment, particularly the difficulty in creating a mold, and eliminates the convexity that was conventionally formed integrally with fire-resistant investment material. With a new concept of forming a mold base and crucible separately and joining them to form a convex mold, various types of investment materials can be easily molded and the amount of casting can be controlled freely. The present invention has provided a convenient device that can increase mold efficiency, improve mold efficiency, and reduce mold production costs because the refractory short tubular body of the crucible can be repeatedly reused.
第１図は従来の高周波溶解加圧鋳造装置の鋳造
部の構成を示す部分断面図、第２図はこの発明の
一実施例の高周波溶解加圧鋳造装置の凸状鋳型を
説明するための部分断面図、第３図は同じくこの
発明の別の実施例装置の凸状鋳型を説明するため
の部分断面図である。
７……筒状体、７Ｒ……加熱室、９，１２，３
７，３８……鋳型圧接機構、１４……隔壁、２３
……高周波誘導加熱コイル、２５……真空吸引
管、２６……不活性加圧ガス導管、Pd……加圧
ガス圧力、３０……凸状鋳型、３１……ルツボ底
部を有する鋳型基部、３３……ルツボ底部、３４
……ルツボ底部の係合部、３５……短管状体。
FIG. 1 is a partial cross-sectional view showing the configuration of a casting section of a conventional high-frequency melting and pressure casting apparatus, and FIG. 2 is a partial sectional view showing a convex mold of a high-frequency melting and pressure casting apparatus according to an embodiment of the present invention. FIG. 3 is a partial sectional view for explaining a convex mold of another embodiment of the present invention. 7... Cylindrical body, 7R... Heating chamber, 9, 12, 3
7, 38... Mold pressure contact mechanism, 14... Partition wall, 23
... High frequency induction heating coil, 25 ... Vacuum suction tube, 26 ... Inert pressurized gas conduit, P d ... Pressurized gas pressure, 30 ... Convex mold, 31 ... Mold base having a crucible bottom, 33... Crucible bottom, 34
...Engaging part at the bottom of the crucible, 35...Short tubular body.
Claims (1)
を有する凸状鋳型と、前記突出部をその内部に収
容する筒状体をもち、この筒状体の外周に高周波
誘導加熱コイルが巻き回され、かつこの筒状体内
部空間を減圧する真空吸引管ならびに不活性加圧
ガスなどの圧力源を導入出する導管が接続された
加熱室と、前記凸状鋳型基部を前記加熱室下部開
口孔を有する隔壁下面に気密圧接する鋳型圧接機
構を備えてなる高周波溶解加圧鋳造装置におい
て、前記凸状鋳型を相互に分離しうるルツボ側壁
を形成する短管状体と、ルツボ底部を有する鋳型
基部とで構成し、前記短管状体は鋳型基部材料と
同等もしくはそれ以上の耐火性をもつ材料にて形
成して、この短管状体を前記鋳型基部のルツボ底
部に載置係合せしめたことを特徴とする高周波溶
解加圧鋳造装置。1 A convex mold having a crucible part in the upper protrusion part and a mold part in the lower base part, and a cylindrical body that accommodates the protrusion part therein, and a high-frequency induction heating coil is wound around the outer periphery of this cylindrical body. The convex mold base is connected to a heating chamber which is connected to a vacuum suction pipe for decompressing the internal space of the cylindrical body and a conduit for introducing and discharging a pressure source such as an inert pressurized gas, and the convex mold base is connected to an opening at the bottom of the heating chamber. In the high-frequency melting and pressure casting apparatus, the high-frequency melting and pressure casting apparatus is equipped with a mold pressure welding mechanism that is airtightly welded to the lower surface of the partition wall, the short tubular body forming a crucible side wall capable of separating the convex molds from each other; The short tubular body is made of a material with fire resistance equal to or higher than that of the mold base material, and the short tubular body is placed and engaged with the crucible bottom of the mold base. High frequency melting and pressure casting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7112583A JPS59197370A (en) | 1983-04-21 | 1983-04-21 | Pressure casting device by high frequency melting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7112583A JPS59197370A (en) | 1983-04-21 | 1983-04-21 | Pressure casting device by high frequency melting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59197370A JPS59197370A (en) | 1984-11-08 |
| JPH0252583B2 true JPH0252583B2 (en) | 1990-11-14 |
Family
ID=13451529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7112583A Granted JPS59197370A (en) | 1983-04-21 | 1983-04-21 | Pressure casting device by high frequency melting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59197370A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01157759A (en) * | 1987-07-25 | 1989-06-21 | Asahi Roentgen Kogyo Kk | Method and device for precisely casting titanium or titanium alloy |
| JP2857415B2 (en) * | 1989-05-16 | 1999-02-17 | マツダ株式会社 | Pressure casting method |
-
1983
- 1983-04-21 JP JP7112583A patent/JPS59197370A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59197370A (en) | 1984-11-08 |
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