JPH0234264A - Casting apparatus - Google Patents
Casting apparatusInfo
- Publication number
- JPH0234264A JPH0234264A JP18385688A JP18385688A JPH0234264A JP H0234264 A JPH0234264 A JP H0234264A JP 18385688 A JP18385688 A JP 18385688A JP 18385688 A JP18385688 A JP 18385688A JP H0234264 A JPH0234264 A JP H0234264A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- injection
- cavity
- hot water
- runner
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 71
- 239000002184 metal Substances 0.000 claims abstract description 71
- 238000002347 injection Methods 0.000 claims abstract description 52
- 239000007924 injection Substances 0.000 claims abstract description 52
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000010936 titanium Substances 0.000 claims abstract description 6
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 230000002093 peripheral effect Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は鋳造装置に関し、−層詳細には、溶湯を金型の
湯溜まり部に導く射出スリーブと、前記射出スリーブに
摺動自在に嵌合する射出プランジャの先端部と、前記溶
湯の湯道を画成する部材の少なくともいずれか１つを熱
伝導率の低い金属材料で構成し、溶湯を前記湯溜まり部
に注湯する際、および湯溜まり部からキャビティ内に充
填する際に溶湯からの温度放出を極力抑制し、それによ
って溶湯表面に凝固層が発生することを阻止し、併せて
製品品質に優れ耐用性に富む鋳造品を得ることを可能と
する鋳造装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a casting apparatus, and more particularly, an injection sleeve that guides molten metal to a pool of a mold, and an injection sleeve that is slidably fitted into the injection sleeve. At least one of the fitting tip of the injection plunger and the member defining the runner for the molten metal is made of a metal material with low thermal conductivity, and when pouring the molten metal into the molten metal pool, and When filling the cavity from the pool, the temperature release from the molten metal is suppressed as much as possible, thereby preventing the formation of a solidified layer on the surface of the molten metal, and at the same time obtaining a cast product with excellent product quality and long durability. This invention relates to a casting device that makes it possible to do this.
［発明の背景コ
一般に、例えば、自動車部品等を生産する際に鋳造装置
が広範に利用されている。すなわち、鋳造装置によれば
製品を短時間に大量に生産することが出来るからである
。このような鋳造装置は湯溜まり部と、溶湯の通路とな
る湯道と、この湯道と連通し鋳造品を得るキャビティと
を含む。前記鋳造装置で製品を鋳造する場合にはｌ若し
くは２以上の金属を溶融した高温度の溶湯を湯溜まり部
に貯溜した後、射出プランジャを駆動して前記湯溜まり
部内の溶湯を高圧で湯道を介してキャビティ内に充填し
て所定温度に下降して凝固した後、鋳造品として取り出
す。[Background of the Invention] In general, casting machines are widely used when producing, for example, automobile parts. That is, the casting apparatus allows products to be produced in large quantities in a short period of time. Such a casting apparatus includes a sump, a runner that serves as a passage for the molten metal, and a cavity that communicates with the runner to obtain a cast product. When casting a product using the casting device, a high-temperature molten metal made by melting one or more metals is stored in a molten metal pool, and then an injection plunger is driven to pump the molten metal in the molten metal into a runner under high pressure. The material is filled into a cavity through a mold, cooled to a predetermined temperature and solidified, and then taken out as a cast product.
ここで、前記溶湯を湯溜まり部に貯溜する際に、溶湯を
比較的速い速度で注湯すると、当該溶湯の流れが乱れエ
アを巻き込む虞があるので、これを比較的遅い速度で前
記湯溜まり部内に注湯する必要がある。エアを巻き込ん
だ溶湯をキャビティ内に充填して鋳造品を得ると、この
鋳造品の強度が低下するためである。従って、前記湯溜
まり部内に所定量の溶湯が貯溜するまでに比較的長い時
間をとらざるを得ない。この間に溶湯は湯溜まり部、射
出スリーブおよび射出プランジャの先端部において熱損
失が発生し、溶湯の熱が射出プランジャ、射出スリーブ
等に奪われることになる。この結果、溶湯の温度が低下
し、この部分に凝固層が発生する。この凝固層を含む溶
湯をキャビティ内に充填すると凝固層の一部が鋳造品の
内部に巻き込まれてしまう。このようにして鋳造された
製品は内部組織にこの凝固層を原因とする鋳造欠陥を生
じ、製品の疲労強度が低下する等の品質上の問題が発生
する。Here, when storing the molten metal in the molten metal pool, if the molten metal is poured at a relatively high speed, the flow of the molten metal may be disturbed and air may be drawn in. It is necessary to pour hot water into the room. This is because when a cast product is obtained by filling a cavity with molten metal that involves air, the strength of the cast product decreases. Therefore, it takes a relatively long time until a predetermined amount of molten metal is stored in the molten metal pool. During this time, heat loss occurs in the molten metal at the pool, the injection sleeve, and the tip of the injection plunger, and the heat of the molten metal is taken away by the injection plunger, injection sleeve, and the like. As a result, the temperature of the molten metal decreases, and a solidified layer is generated in this area. When the molten metal containing this solidified layer is filled into the cavity, a part of the solidified layer is rolled into the inside of the cast product. Products cast in this manner develop casting defects in the internal structure due to the solidified layer, resulting in quality problems such as reduced fatigue strength of the product.
ところで、凝固層の発生を未然に阻止する手段として射
出スリーブに温度制御機構を設けることが案出されてい
る。この温度制御機構は射出スリーブの側面部の温度を
上昇させて溶湯との温度差をなくし溶湯の熱損失を阻止
するものである。従って、溶湯を比較的遅い速度で湯溜
まり部に注湯しても熱損失を阻止出来るので、溶湯に凝
固層は発生しない。By the way, as a means to prevent the formation of a solidified layer, it has been devised to provide a temperature control mechanism in the injection sleeve. This temperature control mechanism increases the temperature of the side surface of the injection sleeve to eliminate the temperature difference with the molten metal and prevent heat loss from the molten metal. Therefore, even if the molten metal is poured into the pool at a relatively slow rate, heat loss can be prevented, and no solidified layer will be formed in the molten metal.
然しながら、この溶湯をキャビティ内に充填する際、前
記と同様に生産効率を追求すると比較的高い速度で溶湯
をキャビティ内に充填しなければならない。このため、
却ってエアを巻き込む虞が出てくる。一方、比較的低い
速度で充填しようとすると、溶湯は湯道を通過する間に
熱損失が発生して温度が低下しここに凝固層が生成され
る。従って、注湯中の熱損失に基因する凝固層の発生は
効果的に阻止されるには至っていない。However, when filling the cavity with this molten metal, the molten metal must be filled into the cavity at a relatively high speed in order to pursue production efficiency as described above. For this reason,
On the contrary, there is a risk that air will be drawn in. On the other hand, if the molten metal is filled at a relatively low rate, heat loss occurs while the molten metal passes through the runners, the temperature decreases, and a solidified layer is formed there. Therefore, the formation of a coagulated layer due to heat loss during pouring has not been effectively prevented.
［発明の目的］
本発明は前記の不都合を克服するためになされたもので
あって、射出スリーブと、射出スリーブに摺動自在に嵌
合する射出プランジャと、湯溜まり部からキャビティに
連通ずる湯道を画成する部材のいずれか１つまたはその
全てを熱伝導率の低い金属、例えば、チタン合金により
構成することで高温度の溶湯を湯溜まり部に注湯する際
並びに湯溜まり部から前記射出プランジャを介してキャ
ビティ内に充填する際に、溶湯の熱が外部に奪われず温
度を略均−に保持することが可能なように構成している
。このため、溶湯の熱損失を防止し且つ前記熱損失に基
因する凝固層の発生を未然に阻止し、しかも溶湯を湯溜
まり部からキャビティ内に充填する際の熱損失の増大が
回避出来るために溶湯の粘性をそのまま保持し、従らて
、最小限の加圧力で射出プランジャを駆動させることが
可能となる。また、溶湯の湯回り性、押湯効果も向上出
来るため溶湯を比較的遅い速度でキャビティ内に充填す
ることが可能であり、エアの巻き込みを回避することも
出来る。この結果、製品の疲労強度を向上させ且つ高品
質な鋳造品を大量生産することが可能となる。[Object of the Invention] The present invention has been made to overcome the above-mentioned disadvantages, and includes an injection sleeve, an injection plunger that is slidably fitted into the injection sleeve, and a hot water that communicates with the cavity from the reservoir. Any one or all of the members defining the path are made of a metal with low thermal conductivity, for example, a titanium alloy, so that when pouring high-temperature molten metal into the molten metal pool and from the molten metal pool, it is possible to The structure is such that when filling the cavity through the injection plunger, the heat of the molten metal is not transferred to the outside and the temperature can be maintained at a substantially uniform temperature. Therefore, it is possible to prevent heat loss of the molten metal, prevent the formation of a solidified layer due to the heat loss, and avoid an increase in heat loss when filling the molten metal from the pool into the cavity. It is possible to maintain the viscosity of the molten metal as it is, and therefore drive the injection plunger with a minimum pressing force. In addition, since the flowability of the molten metal and the pushing effect can be improved, it is possible to fill the cavity with the molten metal at a relatively slow speed, and it is also possible to avoid entrainment of air. As a result, it becomes possible to improve the fatigue strength of the product and mass-produce high-quality cast products.
［目的を達成するための手段］
前記の目的を達成するために、本発明は射出スリーブの
内部を摺動変位する射出プランジャの押圧作用下に溶湯
を湯溜まり部から湯道を介してキャビティに導入し所定
形状の鋳造品を得るための鋳造装置において、少なくと
も射出スリーブ、および射出プランジャ先端に設けられ
たチップ、湯溜まり部、湯道を画成する部材をチタン若
しくはチタン合金で構成することを特徴とする。[Means for Achieving the Object] In order to achieve the above-mentioned object, the present invention provides a method for injecting molten metal from a pool into a cavity via a runner under the pressing action of an injection plunger that slides inside an injection sleeve. In a casting apparatus for obtaining a cast product of a predetermined shape, at least the injection sleeve, the tip provided at the tip of the injection plunger, the members defining the molten metal reservoir and the runner are made of titanium or a titanium alloy. Features.
［実施態様コ
次に、本発明に係る鋳造装置について好適な実施態様を
挙げ、添付の図面を参照しながら以下詳細に説明する。[Embodiments] Next, preferred embodiments of the casting apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
第１図乃至第３図において、参照符号１０は本実施態様
に係る鋳造装置を示す。前記鋳造装置１０は金型１２と
給湯機構１４とから基本的に構成される。前記金型１２
はダイベース１６上に載置された下型１８とこの下型１
８の上方に配設され図示しない駆動手段により昇降自在
に構成される上型２０と、スライド型２２ａ、２２ｂと
を含む。ここで、前記上型２０は第１上型２０ａと第２
上型２０ｂとで構成され、前記第１上型２０ａ１第２上
型２０ｂは一体的に変位する。また、前記スライド型２
２ａおよび２２ｂは水平方向に対して所定角度傾斜する
よう配設されている。さらに、−組の摺動型２４ａ乃至
２４Ｃと摺動型２５ａ乃至２５Ｃとが上型２０および下
型１８に嵌合する（第１図参照）。In FIGS. 1 to 3, reference numeral 10 indicates a casting apparatus according to this embodiment. The casting apparatus 10 basically consists of a mold 12 and a hot water supply mechanism 14. The mold 12
The lower mold 18 placed on the die base 16 and the lower mold 1
The mold 20 includes an upper mold 20 disposed above the mold 8 and configured to be movable up and down by a drive means (not shown), and slide molds 22a and 22b. Here, the upper mold 20 includes a first upper mold 20a and a second upper mold 20a.
The first upper mold 20a1 and the second upper mold 20b are integrally displaced. In addition, the slide type 2
2a and 22b are arranged so as to be inclined at a predetermined angle with respect to the horizontal direction. Further, the sliding molds 24a to 24C and the sliding molds 25a to 25C of the negative set are fitted into the upper mold 20 and the lower mold 18 (see FIG. 1).
すなわち、前記下型１８と上型２０およびスライド型２
２ａ、２２ｂ並びに−組の摺動型２４ａ乃至２４ｃと摺
動型２５ａ乃至２５ｃとによりキャビティ２６が画成さ
れる。このキャビティ２６は、例えば、ステアリング等
のギヤボックスを形成する鋳造品を得るものであり、略
円筒状を呈し、上下方向に孔部を画成したものである。That is, the lower mold 18, the upper mold 20, and the slide mold 2
A cavity 26 is defined by the sliding molds 2a, 22b, the sliding molds 24a to 24c, and the sliding molds 25a to 25c. The cavity 26 is a cast product that forms, for example, a gear box such as a steering wheel, and has a substantially cylindrical shape with a hole defined in the vertical direction.
前記キャピテイ２６はスライド型２２ａ、２２ｂに対応
して傾斜画成されている。キャビティ２６に連通する湯
道２８が外周部材３０ａ乃至３０ｄによって画成され、
前記外周部材３０ａは上型２０に固着され、外周部材３
０ｂ乃至３０ｄはダイベース１６上に載置されている。The cavity 26 is sloped to correspond to the slide molds 22a and 22b. A runner 28 communicating with the cavity 26 is defined by outer peripheral members 30a to 30d,
The outer peripheral member 30a is fixed to the upper mold 20, and the outer peripheral member 30a is fixed to the upper mold 20.
0b to 30d are placed on the die base 16.
ここで、外周部材３０ａ乃至３０ｄは熱伝導率の低い金
属、すなわち、熱伝導率が略０．０１８［’ａｌ／ｃｍ
−８・℃のチタン合金により構成されている。チタン合
金として、例えば、チタンにアルミニウムおよびバナジ
ウムを添加した合金（Ｔｉ−６Ａβ−４Ｖ）またはチタ
ンにアルミニウムおよびバナジウム並びに錫を添加した
合金（Ｔｉ −６Ａｊ？−６Ｖ−４３ｎ）等を選択する
ことが出来る。Here, the outer peripheral members 30a to 30d are made of metal with low thermal conductivity, that is, the thermal conductivity is approximately 0.018['al/cm].
It is made of titanium alloy at -8°C. As the titanium alloy, for example, an alloy in which aluminum and vanadium are added to titanium (Ti-6Aβ-4V) or an alloy in which aluminum, vanadium, and tin are added to titanium (Ti-6Aj?-6V-43n) can be selected. I can do it.
一方、金型１２の下部には給湯機構１４が配設され、前
記湯道２８に連通ずる湯溜まり部３２を画成する射出ス
リーブ３４が鉛直方向に設けられる。On the other hand, a hot water supply mechanism 14 is disposed in the lower part of the mold 12, and an injection sleeve 34 defining a hot water reservoir 32 communicating with the runner 28 is vertically provided.
この射出スリーブ３４の内部に画成される通路３５内に
射出プランジャ３６が配設され且つ当該射出プランジャ
３６の先端部にはチップ３６ａが取着されている。前記
射出スリーブ３４と射出プランジャ３６のチップ３６ａ
は外周部材３０ａ乃至３０ｄと同様にチタン合金により
構成される。なふ、射出プランジャ３６の残余の部分は
鉄系材料として合金工具１１（ＳＫＤ６ｉ）を選択して
いる。この合金工具鋼を選択した理由は高温度下におい
ても変形せずに所定の硬さを保持することが可能である
ためである。An injection plunger 36 is disposed within a passage 35 defined inside the injection sleeve 34, and a tip 36a is attached to the tip of the injection plunger 36. The injection sleeve 34 and the tip 36a of the injection plunger 36
is made of titanium alloy like the outer peripheral members 30a to 30d. For the rest of the injection plunger 36, the alloy tool 11 (SKD6i) is selected as the iron-based material. The reason for selecting this alloy tool steel is that it can maintain a predetermined hardness without deforming even under high temperatures.
また、前記湯溜まり部３２に給湯スリーブ３８の先端が
臨むように装着され、この給湯スリーブ３８には給湯プ
ランジャ４０が摺動自在に嵌合する。Further, a hot water supply sleeve 38 is mounted so that the tip thereof faces the hot water pool 32, and a hot water supply plunger 40 is slidably fitted into the hot water supply sleeve 38.
前記給湯スリーブ３８の所定部位には給湯口４２が画成
され、この給湯口４２に臨むようにホッパ４４が配設さ
れる。A hot water supply port 42 is defined at a predetermined portion of the hot water supply sleeve 38, and a hopper 44 is disposed so as to face this hot water supply port 42.
本発明に係る鋳造装置は基本的には以上のように構成さ
れるものであり、次にその作用並びに効果について説明
する。The casting apparatus according to the present invention is basically constructed as described above, and its operation and effects will be explained next.
先ず、上型２０とスライド型２２ａ、２２ｂと摺動型２
４ａ乃至２４Ｃおよび２５ａ乃至２５Ｃを所定の位置に
変位させ、これらの金型によってキャビティ２６を画成
する。次いで、給湯プランジャ４０を退勤動作させた状
態で図示しない給湯手段からアルミニウム等の金属を融
解させた高温度の溶湯Ｍをホッパ４４に比較的遅い速度
で注湯する。First, the upper mold 20, the slide molds 22a and 22b, and the sliding mold 2
4a to 24C and 25a to 25C are displaced to predetermined positions, and a cavity 26 is defined by these molds. Next, while the hot water supply plunger 40 is in the exit operation, high-temperature molten metal M made by melting metal such as aluminum is poured into the hopper 44 at a relatively slow speed from a hot water supply means (not shown).
従って、この溶湯Ｍは給湯スリーブ３８を介して湯溜ま
り部３２を通り、その下方に位置する射出スリーブ３４
に貯溜する。この時、射出プランジャ３６を下方に後退
した位置で停止させておくことは勿論である。Therefore, this molten metal M passes through the hot water supply sleeve 38, the hot water pool 32, and the injection sleeve 34 located below the hot water supply sleeve 38.
Store in. At this time, it goes without saying that the injection plunger 36 should be stopped at the downwardly retreated position.
次に、第３図に示すように、給湯プランジャ４０を矢印
六方向に前進させ給湯スリーブ３８の給湯口４２を閉塞
し、次いで、射出プランジャ３６を射出スリーブ３４内
において矢印Ｂ方向に上昇変位させ、湯溜まり部３２内
の溶湯Ｍを湯道２８を介してキャビティ２６内に所定の
圧力で加圧充填する。そして、所定時間加圧状態を保持
し当該キャビティ２６内の溶７１％Ｍを凝固させる。溶
湯Ｍが所定温度に下降して凝固した後、型開きを行い鋳
造品を得て鋳造サイクルが終了する。次いで、射出プラ
ンジャ３６、給湯プランジャ４０を夫々第２図に示す位
置に後退させて次回の鋳造サイクルに待機させる。Next, as shown in FIG. 3, the hot water supply plunger 40 is moved forward in the six directions of arrows to close the hot water supply port 42 of the hot water supply sleeve 38, and then the injection plunger 36 is displaced upward in the direction of arrow B within the injection sleeve 34. The molten metal M in the molten metal pool 32 is pressurized and filled into the cavity 26 through the runner 28 at a predetermined pressure. Then, the pressurized state is maintained for a predetermined period of time to solidify the molten 71% M in the cavity 26. After the molten metal M falls to a predetermined temperature and solidifies, the mold is opened to obtain a cast product, and the casting cycle is completed. Next, the injection plunger 36 and the hot water supply plunger 40 are respectively retracted to the positions shown in FIG. 2 to stand by for the next casting cycle.
この場合、本実施態様によれば、湯溜まり部３２と、射
出スリーブ３４と、射出プランジャ３６の先端部に取着
されるチップ３６ａと、湯溜まり部３２からキャビティ
２６に連通する湯道２８を画成する外周部材３０ａ乃至
３０ｄとを熱伝導率の低い部材、例えば、チタン合金に
より構成している。In this case, according to the present embodiment, the molten water reservoir 32, the injection sleeve 34, the tip 36a attached to the tip of the injection plunger 36, and the runner 28 communicating from the molten water reservoir 32 to the cavity 26 are connected. The defining outer peripheral members 30a to 30d are made of a material with low thermal conductivity, for example, a titanium alloy.
従って、エアの巻き込みを阻止するために比較的遅い速
度で溶湯Ｍを射出プランジャ３６を介して射出しても、
射出スリーブ３４および射出プランジャ３６のチップ３
６ａとの間で溶１％Ｍに熱損失が発生しないので凝固層
が生成されることはない。また、溶湯Ｍが湯溜まり部３
２から湯道２８を介してキャビティ２６内に充填される
際にも熱損失が発生せず、熱損失に起因する凝固層の発
生を阻止出来る。Therefore, even if the molten metal M is injected via the injection plunger 36 at a relatively slow speed to prevent air entrainment,
Tip 3 of injection sleeve 34 and injection plunger 36
Since no heat loss occurs in the molten 1% M with 6a, no solidified layer is formed. In addition, the molten metal M is
No heat loss occurs when the cavity 26 is filled from the runner 2 through the runner 28, and the formation of a solidified layer due to heat loss can be prevented.
［発明の効果コ
以上のように、本発明によれば、湯溜まり部、射出スリ
ーブおよび射出プランジャと湯道を画成する外周部材と
を熱伝導率の低い金属、すなわち、チタン合金により構
成している。従弓て、高温度の溶湯を湯溜まり部に注湯
する際、および前記湯溜まり部から射出プランジャを介
してキャビティ内に充填する際に、溶湯の熱が外部部材
に奪われることなく温度を給湯の際と実質的に等しく保
持することが出来る。すなわち、溶湯の熱損失を防止す
ることが出来る。これにより、前記熱損失に起因する凝
固層の発生を未然に阻止することが可能となり、凝固層
がキャビティ内に導入されることもない。このように、
溶湯をその給湯時の温度に保持出来る結果、溶湯の粘性
は小さいままで維持されるために流動抵抗も少なく最小
限の加圧力で射出プランジャを駆動させることが出来る
。従って、溶湯の湯回り性、押湯効果を一層向上させる
ことが可能となる。さらに、溶湯を比較的緩慢な速度で
キャビティ内に充填することが出来るので、エアの巻き
込みをなくし製品不良が惹起されることもない。結局、
得られる製品につき所望の疲労強度が確保され且つ高品
質な鋳造品を大量生産することが可能となる効果が得ら
れる。[Effects of the Invention] As described above, according to the present invention, the molten metal reservoir, the injection sleeve, the injection plunger, and the outer peripheral member defining the runner are made of a metal with low thermal conductivity, that is, a titanium alloy. ing. Therefore, when pouring high-temperature molten metal into the molten metal pool, and when filling the cavity from the molten metal pool via the injection plunger, the temperature of the molten metal can be maintained without the heat of the molten metal being taken away by external members. It is possible to maintain the temperature substantially equal to that during hot water supply. That is, heat loss of the molten metal can be prevented. This makes it possible to prevent the formation of a coagulated layer due to the heat loss, and prevents the coagulated layer from being introduced into the cavity. in this way,
As a result of being able to maintain the molten metal at the temperature at which the molten metal is supplied, the viscosity of the molten metal remains low, resulting in less flow resistance and the injection plunger being able to be driven with minimal pressure. Therefore, it becomes possible to further improve the flowability of the molten metal and the feeder effect. Furthermore, since the molten metal can be filled into the cavity at a relatively slow speed, air entrainment is eliminated and product defects are not caused. in the end,
The desired fatigue strength of the obtained product is ensured, and the effect of making it possible to mass-produce high-quality cast products is obtained.
以上、本発明について好適な実施態様を挙げて説明した
が、本発明はこの実施態様に限定されるものではなく、
例えば、射出スリーブの側面部を窒化層等の耐摩耗性硬
化層で形成することが出来る等、本発明の要旨を逸脱し
ない範囲において種々の改良並びに設計の変更が可能な
ことは勿論である。Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments.
For example, it is possible to make various improvements and changes in design without departing from the scope of the present invention, such as forming the side surface of the injection sleeve with a wear-resistant hardened layer such as a nitrided layer.
第１図は本発明に係る鋳造装置の一部省略平面図、
第２図は第１図における■−■線断面図、第３図は本発
明の鋳造装置において射出プランジャが上昇してキャビ
ティに溶湯を充填した状態の■−■線概略縦断説明図で
ある。
１０・・・鋳造装置 １２・・・金型１４・
・・給湯機構 １６・・・ダイベース１８・
・・下型 ２０・・・上型２２ａ、２２
ｂ・・・スライド型
２４ ａ 〜２４ ｃ 、 ２５ ａ 〜２５ ｃ −
・・摺動型２６・・・キャビティ ２８・・・
湯道３０ａ〜３０ｄ・・・外周部材
３４・・・射出スリーブ
３８・・・給湯スリーブ
４４・・・ホッパ
３２・・・湯溜まり部
３６ａ・・・チップ
４０・・・給湯プランジャFig. 1 is a partially omitted plan view of a casting device according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a casting device of the present invention in which the injection plunger rises and enters the cavity. It is a schematic vertical cross-sectional view taken along the line ■-■ in a state filled with molten metal. 10... Casting device 12... Mold 14.
...Hot water supply mechanism 16...Die base 18.
...Lower mold 20...Upper mold 22a, 22
b...Slide molds 24a to 24c, 25a to 25c-
...Sliding type 26...Cavity 28...
Runnels 30a to 30d...Outer peripheral member 34...Injection sleeve 38...Hot water supply sleeve 44...Hopper 32...Hot water reservoir 36a...Tip 40...Hot water supply plunger
Claims (1)
ャの押圧作用下に溶湯を湯溜まり部から湯道を介してキ
ャビティに導入し所定形状の鋳造品を得るための鋳造装
置において、少なくとも射出スリーブ、および射出プラ
ンジャ先端に設けられたチップ、湯溜まり部、湯道を画
成する部材をチタン若しくはチタン合金で構成すること
を特徴とする鋳造装置。(1) In a casting device for obtaining a cast product of a predetermined shape by introducing molten metal from a pool into a cavity via a runner under the pressing action of an injection plunger that slides inside the injection sleeve, at least the injection sleeve , and a casting device characterized in that the tip provided at the tip of the injection plunger, the molten metal reservoir, and the members defining the runner are made of titanium or a titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18385688A JPH0234264A (en) | 1988-07-22 | 1988-07-22 | Casting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18385688A JPH0234264A (en) | 1988-07-22 | 1988-07-22 | Casting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0234264A true JPH0234264A (en) | 1990-02-05 |
Family
ID=16143021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18385688A Pending JPH0234264A (en) | 1988-07-22 | 1988-07-22 | Casting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0234264A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04157056A (en) * | 1990-10-15 | 1992-05-29 | Nippondenso Co Ltd | Normal/defective discriminating method for quality of casting product with die casting |
| KR102680142B1 (en) * | 2023-04-05 | 2024-07-01 | 터보파워텍(주) | Pressure casting method to prevent internal defects of cast products by designing gate and riser in metal mould |
-
1988
- 1988-07-22 JP JP18385688A patent/JPH0234264A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04157056A (en) * | 1990-10-15 | 1992-05-29 | Nippondenso Co Ltd | Normal/defective discriminating method for quality of casting product with die casting |
| KR102680142B1 (en) * | 2023-04-05 | 2024-07-01 | 터보파워텍(주) | Pressure casting method to prevent internal defects of cast products by designing gate and riser in metal mould |
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