JPS58159965A - Casting device - Google Patents

Abstract

PURPOSE:To cast castings having no defects such as blow-holes, by connecting a supply part for molten metal provided with an air cylinder to a casting mold provided with a casting space from below, and pressurizing and packing the molten metal in the supply part into the casting space with a push bar thereby solidifying the molten metal. CONSTITUTION:A casting mold 11 which consists of a bottom mold 11a and a top mold 11b and is provided with a casting space 1 and a supply path 12 for molten metal is placed on a base plate 9 having an opening 10. On the other hand, a supply part 8 for molten metal constituted of an air cylinder part 17 and a supply cylinder 16 for molten metal is moved to the lower part of the plate 9. Compressed air is fed into the cylinder 17 to move the cylinder 16 upward, thereby supplying molten metal 27 into a well 16a. The base plate 14 of the part 8 is moved upward to fit the top end part of the cylinder 16 into the receiving part 13 on the bottom surface of the mold 11, then a push bar 15 is moved upward to force the metal 27 into the casting space 1 of the mold 11. The molten metal in the space 1 is cooled and solidified under the pressurized state, whereby the casting having no blow-holes is obtd. stably.

Description

【発明の詳細な説明】 この発明は、各種鋳造製品を造るための鋳造装置の改良
に関し、鋳造時に湯と呼ばれる溶融金属（以下単に湯と
する。）に効果的に圧力が加えられるようにして、鋳造
製品の品質を向上させることを目的としている。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a casting device for producing various cast products, and is concerned with the improvement of a casting device for producing various cast products, so that pressure can be effectively applied to molten metal called hot water (hereinafter simply referred to as hot water) during casting. , aimed at improving the quality of casting products.

鋳造装置としては、従来第１図に示すような構造のもの
が知られている。即ち、金型２の内部に製品の外形と一
致する形状の内壁面を有する空間１を形成するとともに
、筒状空間３を形成したものである。空間１の上方の筒
状空間３には、ピストン状の押棒４が縦動自在に嵌合し
ている。As a casting apparatus, one having a structure as shown in FIG. 1 is conventionally known. That is, a space 1 having an inner wall surface having a shape matching the outer shape of the product is formed inside the mold 2, and a cylindrical space 3 is also formed. A piston-shaped push rod 4 is fitted into a cylindrical space 3 above the space 1 so as to be vertically movable.

鋳造を行なう場合は、筒状空間３から空間１内に湯を注
入し、この湯を空間１内及び筒状空間３内に満たす。筒
状空間３内の湯は押棒４の下面で弾力的に下圧週れるた
め、空間１内の湯も加圧されて巣等の欠陥のない鋳造製
品が造られる。When casting, hot water is injected into the space 1 from the cylindrical space 3 to fill the space 1 and the cylindrical space 3 with the hot water. Since the hot water in the cylindrical space 3 is elastically pressed down by the lower surface of the push rod 4, the hot water in the space 1 is also pressurized and a cast product without defects such as cavities is produced.

ところが、このように構成され作用する従来の鋳造装置
に於いては・湯の供給と押棒４の下降とを同時に行なう
ことができず、押棒４により空間ｌ内の湯の加圧を開始
するまでの間に空間１内に充填した湯の冷却同化が始ま
るため、空間ｌ内の湯の加圧が不十分となり、製品の品
質が不安定となる欠点があった。However, in the conventional casting apparatus constructed and operated in this way, it is not possible to supply hot water and lower the push rod 4 at the same time, and until the push rod 4 starts pressurizing the hot water in the space l. Since cooling and assimilation of the hot water filled in the space 1 begins during this period, the hot water in the space 1 becomes insufficiently pressurized, resulting in a drawback that the quality of the product becomes unstable.

本発明の鋳造装置は、このような不都合を解消するため
、空間１内への湯の充填と同時に加圧が開始されるよう
に構成したものである。In order to eliminate such inconveniences, the casting apparatus of the present invention is configured so that pressurization is started at the same time as the space 1 is filled with hot water.

以下、実施例を示す図面により、本発明を説明する。The present invention will be described below with reference to drawings showing examples.

第２図は本発明の鋳造装置の第一実施例を示している。FIG. 2 shows a first embodiment of the casting apparatus of the present invention.

本発明の鋳造装置は、上部の鋳型部７と下部の湯供給部
８とから成っている。鋳型部７は、基板９の開口１０の
上方に、下１１！１１ａとこの下型１１１Ｚ対して分割
自在の上ＩＩＭ１１ｂとから成る金型１１ｔｔ固定した
ものである。The casting apparatus of the present invention consists of an upper mold section 7 and a lower hot water supply section 8. The mold section 7 has a mold 11tt fixed above the opening 10 of the substrate 9, which is composed of a lower mold 11!11a and an upper IIM 11b which can be freely separated from the lower mold 111Z.

金型１１の上下型１１ｂ％１１＆の合せ面には製品の外
形と一致する形状の内壁面を有する空間１が形成されて
いる。また、下１１１１１ａには、この空間１の下部に
通じる湯供給路１２が穿設されており、この湯供給路１
２の下端開口周囲には大径の受部１３が形成されている
。A space 1 having an inner wall surface having a shape matching the outer shape of the product is formed on the mating surfaces of the upper and lower molds 11b%11& of the mold 11. Further, a hot water supply path 12 that leads to the lower part of this space 1 is bored in the lower part 11111a, and this hot water supply path 1
A large-diameter receiving portion 13 is formed around the lower end opening of 2.

一方の湯供給部８は、上述した金型１１を固定した基板
９に対して平行状態で遠近移動自在な第二の基板１４の
上面（＝垂直に植立した押棒１５を、この基板１４の上
方に弾性的に支持した湯供給筒１６ζ二摺動自在に内嵌
して構成されている。更（二詳しく説明すると、押棒１
５の上端部の大径部１５＆は湯供給筒１６の内側の湯溜
１６＆と密（−嵌合してこの湯溜１６＆内で上下動自在
としており、この湯供給筒１６の下端に形成した内向フ
ランジ１６ｂの上面が、湯供給筒１６が押漬−１５に対
して最も上昇した場合に大径部１５ａの下面と当接する
ように構成している。一方、湯供給筒１６の下端に形成
した外向フランジ１６ａは、基板１４の上面に上記押棒
１５と同心に固設したエアシリンダ１７ζ二気密に嵌合
、している。このエアシリンダ１７は、内部に圧縮空気
を送給して湯供給筒１６の下面を弾力的に押上げるもの
で、上端部（二形成した　　　　　　゛静内向７ランジ
１７ａの下面が湯供給筒１６の最上昇時に上記外向７ラ
ンジ１６Ｑの上面と当接するように構成されている。エ
アシリンダ１５の側面には、圧縮空気の給気口１８と排
気口１９とが設けられており、各日１８．１９にそれぞ
れ通じる給気管２０と排気管２１との途中には、それぞ
れチェック弁２２．２３が接続されている。このうち、
排気管２１の途中に設けたチェック弁２３は、エアシリ
ンダ１７内のｆＦｌカ一定（例えば１０〜）以上になっ
た場合に開く構造とする。One of the hot water supply units 8 moves a push rod 15 vertically to the upper surface of a second substrate 14 that is movable near and far in parallel to the substrate 9 on which the mold 11 is fixed. Two hot water supply cylinders 16ζ are elastically supported upwardly and are slidably fitted inside.
The large diameter part 15& at the upper end of the hot water supply tube 16 is tightly fitted with the hot water reservoir 16& inside the hot water supply tube 16, and is movable up and down within this hot water reservoir 16&. The upper surface of the inward flange 16b is configured so as to come into contact with the lower surface of the large diameter portion 15a when the hot water supply cylinder 16 is raised the most with respect to the pusher 15. The outward facing flange 16a is airtightly fitted into an air cylinder 17ζ fixed on the upper surface of the base plate 14 concentrically with the push rod 15. This air cylinder 17 supplies hot water by supplying compressed air inside. It elastically pushes up the lower surface of the cylinder 16, and is configured such that the lower surface of the upper end (the two formed inward 7 flange 17a) comes into contact with the upper surface of the outer 7 flange 16Q when the hot water supply cylinder 16 rises to its highest point. An air supply port 18 and an exhaust port 19 for compressed air are provided on the side of the air cylinder 15, and in the middle of the air supply pipe 20 and exhaust pipe 21, which communicate with each other at 18.19 each day, Check valves 22 and 23 are connected to each.
A check valve 23 provided in the middle of the exhaust pipe 21 is configured to open when the fFl in the air cylinder 17 reaches a certain value (for example, 10 or more).

なお、エアシリンダ１７及び押棒１５の上端部と湯供給
筒１６の下端部との保合部は、エアシリンダ１７内に送
給される圧縮空気の漏洩を防止するため、第３図に示す
ように構成する。In addition, in order to prevent leakage of compressed air fed into the air cylinder 17, the upper ends of the air cylinder 17 and the push rod 15 and the lower end of the hot water supply tube 16 are connected as shown in FIG. Configure.

即ち、湯供給筒１６の下端部の内向７ランジ１６ｂの内
周面と外向７ランジ１６０の外周面とに形成した溝にそ
れぞれ気密リング２４，２４を嵌着して摺動部の気密を
保持するとともに、押棒１５と湯供給筒１６との間の空
間２５内に漏出した圧縮空気が湯溜ｔ６ａ内に進入して
湯に気泡を生じないようにするため、この空間２５と湯
供給筒１６外とを通じさせる逃し通路２６を形成してい
る。That is, the airtight rings 24 are fitted into the grooves formed in the inner circumferential surface of the inward seven flange 16b and the outer circumferential surface of the outward seven flange 160 at the lower end of the hot water supply cylinder 16, respectively, to maintain the airtightness of the sliding part. At the same time, in order to prevent compressed air leaking into the space 25 between the push rod 15 and the hot water supply cylinder 16 from entering the hot water reservoir t6a and creating bubbles in the hot water, this space 25 and the hot water supply cylinder 16 are It forms an escape passage 26 that communicates with the outside.

次に、上述のように構成される本発明の鋳造装置の作用
について説明する〇 鋳造を行なう場合、まず給気管２０を通じてエアシリン
ダ１７内に圧縮空気（例えば５〜）を送給し、湯供給筒
１６を、第２図に示すように、上方に向けて弾力的に上
昇させ、湯溜１６ａ内に湯２７【供給する。湯２７が供
給されたならば、基板１４を上昇させ（又は基板９を下
降させ）・鋳型部７と湯供給部８とを互いに近付ける。Next, the operation of the casting apparatus of the present invention configured as described above will be explained. When performing casting, compressed air (for example, 5~) is first fed into the air cylinder 17 through the air supply pipe 20, and hot water is supplied. As shown in FIG. 2, the tube 16 is elastically raised upwards, and hot water 27 is supplied into the hot water reservoir 16a. Once the hot water 27 has been supplied, the substrate 14 is raised (or the substrate 9 is lowered) and the mold part 7 and the hot water supply part 8 are brought closer to each other.

これにより、まず湯供給筒１６の上端部が金型下面の受
部１３と嵌合し、この湯供給筒１６はそれ以上移動しな
くなる。このため、基板１４の上昇に伴って押棒１５の
大径部１５ａが湯溜１６ａ内で上昇し、この湯溜１６ａ
内の湯２７を、ｌ！４図に示すように熾供給路１２を通
じて空間１内に押し込む。湯供給筒１６の停止後、基板
１４の上昇に伴ってエアシリンダ１７内の圧力は上昇す
るが、排気管２１に設けたチェック弁２３が前述のよう
に例えば１０製の一定圧力で開くため、このチェック弁
２３が開いた後は、湯２７は一定圧力で弾圧されも空間
ｌ内に充填された湯が冷却し固化したならば、湯供給部
８を下降（又は鋳造部７を上昇）させて湯供給筒１６と
金型１１とを離し、この金型１１を分割して空間１内か
ら製品を取り出す。湯供給部８の湯供給筒１６及び押棒
は断熱材、ヒータ等で保温し、湯が金型内に押し込まれ
る前に冷却しないようにする。As a result, the upper end of the hot water supply cylinder 16 first fits into the receiving part 13 on the lower surface of the mold, and the hot water supply cylinder 16 no longer moves. Therefore, as the substrate 14 rises, the large diameter portion 15a of the push rod 15 rises within the trough 16a, and this trough 16a
Inner hot spring 27, l! 4, it is pushed into the space 1 through the supply channel 12. After the hot water supply cylinder 16 is stopped, the pressure inside the air cylinder 17 increases as the substrate 14 rises, but the check valve 23 provided in the exhaust pipe 21 opens at a constant pressure of, for example, 10, as described above. After this check valve 23 is opened, the hot water 27 is pressed at a constant pressure, but once the hot water filled in the space l has cooled and solidified, the hot water supply section 8 is lowered (or the casting section 7 is raised). The hot water supply cylinder 16 and the mold 11 are separated, the mold 11 is divided, and the product is taken out from the space 1. The hot water supply cylinder 16 and the push rod of the hot water supply section 8 are kept warm with a heat insulating material, a heater, etc., so that the hot water does not cool down before being pushed into the mold.

次に、第５図に示す本発明の鋳造装置の第二実施例につ
いて説明する。本実施例は・前述の第一実施例が、湯供
給筒１６を上方に弾圧するのに圧縮空気の弾力を利用し
ていたのを、圧縮ばねの弾力を利用するように構成して
いる。即ち、湯供給筒１６の外周面に固設した保持板２
７の下面と湯供給部の基板１４との上面との間に、互い
に摺動自在に係合したシリンダ１９２ｇとロッド２９と
から成る伸縮杆３ｏを複数個掛は渡し、各伸縮杆３０，
３０の周囲に圧縮ばね３１．３１を設け、湯供給１１１
１６をこの圧縮ばね３１．３１により基板１４の上方に
弾力的に支持している。その他の構成及び作用について
は、前述の第一実施例と同様であるため、同等部分には
同一符号を付して重複する説明を省略する。Next, a second embodiment of the casting apparatus of the present invention shown in FIG. 5 will be described. This embodiment uses the elasticity of a compression spring to press the hot water supply tube 16 upward, whereas the first embodiment uses the elasticity of compressed air. That is, the holding plate 2 fixedly installed on the outer peripheral surface of the hot water supply cylinder 16
A plurality of telescopic rods 3o each consisting of a cylinder 192g and a rod 29 that are slidably engaged with each other are passed between the lower surface of the base plate 14 of the hot water supply section and the upper surface of the substrate 14 of the hot water supply section.
A compression spring 31.31 is provided around the hot water supply 111.
16 is elastically supported above the substrate 14 by the compression springs 31,31. The other configurations and operations are the same as those of the first embodiment described above, so the same parts are given the same reference numerals and redundant explanations will be omitted.

本発明の鋳造装置は以上に述べた様に構成され作用し、
金型２の空間１内への湯の充填と同時にこの湯の加圧が
開始されるため、加圧開始時までに湯が冷却し固化する
ことがなく、加圧の効果が十分に得られて良質の鋳造製
品を得ることができる。また、泳零社を示＝±従来の鋳
造装置のように、湯道を設けることがないため材料の歩
留りも向上する等、産業上の効果が大きい。The casting apparatus of the present invention is constructed and operates as described above,
Since the pressurization of the hot water starts at the same time as the filling of the hot water into the space 1 of the mold 2, the hot water does not cool and solidify by the time pressurization starts, and the effect of pressurization can be fully obtained. You can obtain high quality casting products. In addition, unlike conventional casting equipment, there is no need to provide a runner, so the material yield is improved, which has great industrial effects.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の鋳造装置を示す縦断面図、第２〜４図は
本発明の第一実施例を示しており、第２図は準備工程の
縦断面図、第３図は第２図のＡ部拡大断面図、第４図は
鋳造工程の縦断面図、第５図は本発明の第二実施例を示
す第２図同様の縦断面図である。 １：空間、２：金型、３：湯道、４：＠状空間°、５：
湯口、６：押棒、７：鋳型部、８：湯供給部、９：基板
、１０＋開口、ｌｌ：金型、１１１Ｌ：下型、１１ｂ；
上型、１２：湯供給路、１３：受部、１４：基板、１５
：押棒、１５ａ：大径部、ｉｓ＋湯供給筒、１６ａ：湯
溜、１６ｂ：内向７ランジ、１６０：外向７ランジ、１
７；エアシリンダ、１７ａ＋内向７ランジ、１８：給気
ロー１９：排気口、２０：給気管、２１：排気管、２２
．２３：逆止弁、２４：気密リング、２５：空間、２６
：逃し通路、２７：保持板、２８ニジリンダ筒、２９：
ロッド、３０：伸縮杆、３１：圧縮ばね。 ３０ 第４図 第５図Fig. 1 is a longitudinal sectional view showing a conventional casting device, Figs. 2 to 4 show a first embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a preparatory process, and Fig. 3 is a longitudinal sectional view of a preparatory process. FIG. 4 is a longitudinal sectional view of the casting process, and FIG. 5 is a longitudinal sectional view similar to FIG. 2 showing a second embodiment of the present invention. 1: Space, 2: Mold, 3: Runway, 4: @-shaped space, 5:
sprue, 6: push rod, 7: mold section, 8: hot water supply section, 9: substrate, 10+ opening, ll: mold, 111L: lower mold, 11b;
Upper mold, 12: hot water supply path, 13: receiving part, 14: board, 15
: push rod, 15a: large diameter part, IS+ hot water supply tube, 16a: water reservoir, 16b: 7 inward lunges, 160: 7 outward lunges, 1
7; Air cylinder, 17a + inward 7 lunge, 18: Air supply low 19: Exhaust port, 20: Air supply pipe, 21: Exhaust pipe, 22
．． 23: Check valve, 24: Airtight ring, 25: Space, 26
: Relief passage, 27: Holding plate, 28 Niji cylinder cylinder, 29:
Rod, 30: Telescopic rod, 31: Compression spring. 30 Figure 4 Figure 5

Claims (1)

【特許請求の範囲】[Claims] 第一の基板（９）の開口（１０）の上方に、製品を鋳造
する空間（１）を有する金型（１１）を固定し、この金
型（１１）の下面には上記空間（１）と外部とを通じさ
せる湯供給路（１２）を形成した鋳型部（７）と、第二
の基板（１４）の上面に垂直に植立した押棒（１５）に
上下動自在に外嵌した湯供給筒（１６）を弾性的に支持
して成る湯供給部（８）とから成り、鋳型部（７）と湯
供給部（８）とは遠近移動自在とした鋳造装置。A mold (11) having a space (1) for casting a product is fixed above the opening (10) of the first substrate (9), and the space (1) is provided on the lower surface of the mold (11). A mold part (7) forming a hot water supply path (12) that communicates with the outside, and a hot water supply fitted externally to a push rod (15) vertically planted on the upper surface of the second substrate (14) so as to be movable up and down. This casting device consists of a hot water supply section (8) that elastically supports a cylinder (16), and the mold section (7) and the hot water supply section (8) are movable near and far.