JPS6281245A - Molding method for vacuum casting mold - Google Patents
Molding method for vacuum casting moldInfo
- Publication number
- JPS6281245A JPS6281245A JP60222423A JP22242385A JPS6281245A JP S6281245 A JPS6281245 A JP S6281245A JP 60222423 A JP60222423 A JP 60222423A JP 22242385 A JP22242385 A JP 22242385A JP S6281245 A JPS6281245 A JP S6281245A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- flask
- shielding
- hollow hole
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、減圧鋳型の造型方法、特に注湯時における
通気孔を備えた減圧鋳型の造型方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for making a vacuum mold, and particularly to a method for making a vacuum mold provided with ventilation holes during pouring.
一般に減圧鋳型を構成する上型および下型の造型方法は
、上型または下型の一方に関していえば、模型本体の上
面全体に造型用膜状遮蔽材を吸着被覆させる第１工程と
、吸着被覆させた前記遮蔽材を介して前記模型本体上に
鋳型枠を載置して同鋳型枠内に充填材を充填する第２工
程と、前記充填材の上面全体を被覆用膜状遮蔽材にて覆
蓋し前記鋳型枠内を減圧させる第３工程と、前記各工程
を経て形成された鋳型から前記模型本体を型抜きする第
４工程とからなる基本的な４工程によって実施されてい
る。このようにして形成された減圧鋳型においては、鋳
型枠内の充填材は、鋳型枠に当接する部分を除きすべて
の外表面が遮蔽材でおおわれ減圧されて大気と遮断され
ている。したがって、周知のように、上型の所定の部位
に通気孔を設けて、鋳型注湯の初期においては、鋳型空
隙部に存在する空気、遮蔽材や中子粘結材の燃焼生成ガ
ス、水蒸気、および溶湯から発生するガス等を排出させ
、かつ注湯途中においては、この通気孔から逆に大気を
吸入して、鋳型空隙部が減圧状態となることを防ぐこと
が必要である。なお、注湯後掲り、押湯等として機能す
る鋳型空隙部のうち上型上面に開口するものは、鋳型注
湯時に通気孔の作用を兼ねさせることができるので、以
下通気孔という場合には、上型上面に開口し、注湯後掲
り、押湯等の機能をもつ鋳型空隙部も含むものとする。In general, the manufacturing method for the upper and lower molds that constitute a vacuum mold consists of a first step of adsorbing and coating the entire upper surface of the model body with a film-like shielding material for molding, and a first step of adsorbing and coating the entire upper surface of the model body. a second step of placing a mold flask on the model body through the shielding material and filling the mold flask with a filler, and covering the entire upper surface of the filler with a film-like shielding material. The process is carried out in four basic steps, including a third step of covering the mold flask and reducing the pressure in the mold flask, and a fourth step of cutting out the model body from the mold formed through each of the above steps. In the vacuum mold formed in this manner, all the outer surfaces of the filling material in the mold flask, except for the portion that contacts the mold flask, are covered with a shielding material to reduce the pressure and isolate it from the atmosphere. Therefore, as is well known, ventilation holes are provided in predetermined parts of the upper mold, and at the initial stage of mold pouring, air present in the mold cavity, gas produced by combustion of the shielding material and core caking material, and water vapor It is necessary to exhaust gases generated from the molten metal and the like, and to suck in air from the vent hole during pouring to prevent the mold cavity from becoming depressurized. Note that among the mold cavities that open after pouring and functioning as risers, etc., on the top surface of the upper mold, they can also function as ventilation holes when pouring metal into the mold, so they will be referred to as ventilation holes below. shall also include a mold cavity that opens on the upper surface of the upper mold and functions as a riser after pouring the molten metal.
ところで、通気孔の成形方法として従来慣用されている
のは、第５図に示すとおり、まず通気用原型取り付は用
台座Ｌｌａを設けた模型本体１１に、熱可塑性膜状造型
用遮蔽材１４を吸着被覆させる（第１工程）。他方、木
材等によって形成された通気孔用原型１２の外周面に原
型用膜状遮蔽材１３を気密に巻き付けたものを予め準備
しておく。しかして、これを模型本体に取り付けるには
、第１工程を終ったのちに、取り付は用台座１１ａの部
位に吸着した造型用遮蔽材１４ａを除去し、通気孔用原
型１２を取り付けたのち、第６図に示すとおり、模型本
体１１のこの部位に残った遮蔽材１４の周縁と通気孔用
原型１２に巻き付けた遮蔽材１３の下縁とを粘着テープ
１５により気密に接合する。次に遮蔽材１４を介して模
型本体１１の上面に鋳型枠を載置し、同枠内に充填材１
６を充填して（第２工程）、その上面を被覆用膜状遮蔽
材１７で覆蓋したのち減圧造型する（第３工程）。By the way, as shown in FIG. 5, the conventional method for forming ventilation holes is to first attach a thermoplastic film-like molding shielding material 14 to a model body 11 on which a pedestal Lla is provided. is adsorbed and coated (first step). On the other hand, a prototype membrane shielding material 13 is airtightly wrapped around the outer peripheral surface of a ventilation hole prototype 12 made of wood or the like, which is prepared in advance. Therefore, in order to attach this to the model body, after completing the first step, remove the molding shielding material 14a adsorbed to the part of the pedestal 11a, and attach the ventilation hole prototype 12. As shown in FIG. 6, the peripheral edge of the shielding material 14 remaining at this part of the model body 11 and the lower edge of the shielding material 13 wrapped around the vent pattern 12 are hermetically joined with an adhesive tape 15. Next, a molding frame is placed on the upper surface of the model body 11 through the shielding material 14, and a filler 1 is placed in the same frame.
6 (second step), and after covering the upper surface with a covering film-like shielding material 17, vacuum molding is performed (third step).
そして、第４工程の型抜きに先立って鋳型枠上面に吸着
された遮蔽材１７の通気孔用原型１２の上端に当接する
部分を除去し、残った遮蔽材１７の周縁と通気孔用原型
１２に巻き付けた遮蔽材１３の上縁とを気密に接合する
。 第４工程を終ったのちに、通気孔用原型１２を上方
に抜き取る。Then, prior to the mold cutting in the fourth step, the portion of the shielding material 17 adsorbed to the upper surface of the mold flask that contacts the upper end of the vent hole prototype 12 is removed, and the peripheral edge of the remaining shielding material 17 and the vent hole prototype 12 are removed. and the upper edge of the shielding material 13 wrapped around the shielding material 13 are airtightly joined. After completing the fourth step, the vent pattern 12 is pulled out upward.
上述のように、従来の通気孔の成形方法によると、多く
の工程を要する。特に鋳型枠を効果的に使用するために
、−枠に複数個込めをする場合には、通気孔成形作業が
造型工程遅延の隘路となっている。As mentioned above, the conventional method for forming vent holes requires many steps. Particularly when a plurality of molds are placed in a mold flask in order to use the flask effectively, the work of forming the vent hole becomes a bottleneck that delays the molding process.
さらに重要な問題は、上記の複数個込めの場合に、通気
孔成形作業を簡単化して造型能率を上げる目的をもって
、できるだけ通気孔の数を減らそうとして、これを個々
の鋳型空隙部の頂部には設けず、第７図に示すように、
空隙頂部より低い場所に１枠中に含まれる数個の鋳物（
空隙部）に共用の通気孔（２２は通気孔用原型を示す。An even more important problem is that in the case of multiple injection holes as described above, in order to simplify the air hole molding work and increase molding efficiency, the number of air holes is reduced as much as possible, and these holes are placed at the top of each mold cavity. As shown in Figure 7,
Several castings contained in one frame are located below the top of the cavity (
A common ventilation hole (22 indicates a prototype for the ventilation hole).
）を設けることが多かった。ところがこの場合には、注
湯に際して通気孔の下端まで溶湯水準面が到達したあと
は、通気孔のない鋳型空隙部に閉じこめられた空気、ガ
ス等は逃げにくくなり、その圧力のために、この空隙部
へのｆ４湯の流入速度が不安定となり、溶湯の充填が不
円滑となって、結果として鋳物製品表面に湯じわその他
の欠陥を生じやすい。) was often provided. However, in this case, after the molten metal level reaches the bottom of the vent hole during pouring, it becomes difficult for air, gas, etc. trapped in the mold cavity without a vent hole to escape, and due to the pressure, this The flow rate of the f4 molten metal into the void becomes unstable, making the filling of the molten metal uneven, and as a result, molten metal wrinkles and other defects are likely to occur on the surface of the cast product.
この発明はこれらの問題を解決し、所望の部位に安易に
通気孔を成形できる新規な方法を堤供するためになされ
たもので、前記減圧鋳型造型法において、前記第１工程
に先立って前記模型本体上面の所定の部位に、その上下
方向に貫通する中空孔を有しかつその上面が鋳型枠上縁
に露呈する消失性通気孔用型材の下端を位置ぎめ固定し
、ついで前記第１ないし第３工程を経て互に密着した前
記両遮蔽材の前記中空孔の上端における重合部分を除去
して同中空孔を開口し同重合部分の周縁を気密に接合し
たのち、第４工程により型抜きするようにしたことによ
って構成されており、型抜きに際しては前記型材をすべ
て鋳型内に残すようにし、鋳型内への注湯時に前記型材
の有する中空孔によって通気孔が形成される。The present invention has been made to solve these problems and provide a new method by which ventilation holes can be easily formed in desired parts. The lower end of a material for a fugitive ventilation hole, which has a hollow hole penetrating vertically and whose upper surface is exposed at the upper edge of the mold flask, is positioned and fixed at a predetermined location on the upper surface of the main body, and then the first to The overlapping portions at the upper ends of the hollow holes of the two shielding materials that have come into close contact with each other through three steps are removed, the hollow holes are opened, and the peripheries of the overlapping portions are airtightly joined, and then die cutting is performed in a fourth step. When the mold is removed, all of the mold material is left in the mold, and when pouring into the mold, a vent hole is formed by the hollow hole of the mold material.
上述のとおり、この発明の方法においては、造型用遮蔽
材は単に模型本体の遮蔽用としてだけでなく、通気孔用
型材をも含め模型本体の上面全体を一体的に遮蔽するた
めに用いられるので、型抜きに際して、型材はすべてそ
のままの位置で鋳型内に残され、鋳型への注湯に際して
は最初は型材に設けられた中空孔が通気孔として作用し
、またそれが燃焼消失したあとでは、それぞれ揚り、押
湯等としての機能を果す。As mentioned above, in the method of the present invention, the molding shielding material is used not only to shield the model body, but also to integrally shield the entire upper surface of the model body including the vent material. When the mold is removed, all the mold material is left in the same position in the mold, and when pouring metal into the mold, the hollow hole provided in the mold material initially acts as a ventilation hole, and after it burns and disappears, Each serves as a fryer, a riser, etc.
この発明の方法においては、消失性通気孔用型材を模型
本体に位置決め固定した状態で、造型用遮蔽材によって
前記型材を含めた模型本体の上面全体を一体的に遮蔽し
、かつ型抜きに際しては前記型材を鋳型内にそのまま残
すことを要旨としているので、従来の方法にくらべて簡
単で通気孔成形に必要とする工程が少ない。In the method of the present invention, the entire upper surface of the model body including the molding material is integrally shielded by a molding shielding material while the molding material for the fugitive ventilation hole is positioned and fixed on the model body, and when the molding material is cut out, Since the main idea is to leave the mold material as it is in the mold, it is simpler and requires fewer steps for forming the vent holes than conventional methods.
このため、通気孔を所望の鋳型空隙部の頂部だけでなく
、鋳型内の空気、ガス等が閉じ込められて抜けにくいい
わゆるポケット部のすべての頂部に直接安易に設けるこ
とができる。したがって、この発明による通気孔の成型
方法を通用した減圧鋳型においては、共用の通気孔を設
置する必要がないため、共用通気孔特有の湯じわ等の欠
陥の発生を確実に防止することができる。Therefore, ventilation holes can be easily and directly provided not only at the tops of desired mold cavities, but also directly at the tops of all so-called pockets where air, gas, etc. are trapped and difficult to escape from within the mold. Therefore, in the vacuum mold using the vent molding method according to the present invention, there is no need to install a common vent, so it is possible to reliably prevent the occurrence of defects such as hot water wrinkles that are peculiar to common vents. can.
この発明の一実施例を第１図ないし第４図を参照しなが
ら説明する。第１図には模型本体１の上面全体に熱可塑
性プラスチックフィルムからなる造型用遮蔽材４を吸着
被覆させた状態を（第１工程）、第２図には鋳型枠５内
に珪酸質充填材６を充填しく第２工程）、プラスチック
フィルムからなる被覆用遮蔽材７により覆蓋した状態を
（第３工程）、第３．４図には第２図の要部を拡大して
それぞれ示す。第１図において、模型本体１の上面には
通気孔を設けようとする部位に通気孔用型材取り付は用
台座１ａが予め設置されている。発泡ポリスチレンによ
って形成された通気孔用型材２には、その上下方向に貫
通する中空孔２ａが穿設されているが、この中空孔２ａ
の上端は減圧の際の吸引と充填の際の充填材の落ち込み
を防止するため、粘着テープからなる閉塞材３によって
予め気密に閉塞しておく。まず、型材２の下端を中空孔
２ａを介して取り付は用台座１ａに嵌合し型材２を固定
自立させる。このように型材２を固定自立させた模型本
体１の上面全体に予め加熱した造型用遮蔽材４を通常の
方法により一体的に吸着被覆させる（第１図、第１工程
）。次に造型用遮蔽材４によって被覆された模型本体１
の上に鋳型枠５を載置し、開枠５内に珪酸質充填材６を
微振動を与えながら充填したうえ、充填材６の上面をな
らして被覆用遮蔽材７によって覆蓋する（第２図および
第３図、第２および第３工程）。このとき、被覆用遮蔽
材７の下面と造型用遮蔽材４の上面とが型材２の上面の
部位で重合している。その後、通常の方法により鋳型枠
５の内部を減圧する（第３工程）。次に第４図に示すよ
うに互に密着した両遮蔽材４．７の型材中空孔２ａの上
端における重合部分を閉塞材３とともに除去して同中空
孔を開口し、残った両遮蔽材４．７の周縁を気密に接合
したのち型抜きを行う（第４工程）。An embodiment of the present invention will be described with reference to FIGS. 1 to 4. Fig. 1 shows a state in which the entire upper surface of the model body 1 is adsorbed and coated with a molding shielding material 4 made of a thermoplastic plastic film (first step), and Fig. 2 shows a state in which a silicic acid filler is placed in a mold flask 5. Fig. 3.4 shows an enlarged view of the main part of Fig. 2, respectively. In FIG. 1, a pedestal 1a for attaching a vent hole molding material is previously installed on the upper surface of a model body 1 at a portion where a vent hole is to be provided. The vent material 2 made of expanded polystyrene has a hollow hole 2a that passes through it in the vertical direction.
The upper end of the container is airtightly closed in advance with a closing material 3 made of adhesive tape in order to prevent suction during depressurization and fall of the filling material during filling. First, the lower end of the molded material 2 is fitted into the mounting pedestal 1a through the hollow hole 2a, so that the molded material 2 is fixed and self-supporting. The entire upper surface of the model body 1 with the mold material 2 fixed and self-supporting in this way is integrally adsorbed and coated with the preheated molding shielding material 4 by a normal method (FIG. 1, first step). Next, the model body 1 covered with the molding shielding material 4
The mold flask 5 is placed on top of the mold flask 5, and the silicic acid filler 6 is filled into the open frame 5 while giving slight vibrations, and the upper surface of the filler 6 is leveled and covered with a covering shielding material 7. 2 and 3, second and third steps). At this time, the lower surface of the covering shielding material 7 and the upper surface of the molding shielding material 4 overlap at the upper surface of the mold material 2 . Thereafter, the pressure inside the mold flask 5 is reduced by a normal method (third step). Next, as shown in FIG. 4, the overlapping portions at the upper ends of the hollow holes 2a of the two shielding materials 4.7 that are in close contact with each other are removed together with the closing material 3 to open the hollow holes, and the remaining two shielding materials 4. After the periphery of .7 is airtightly joined, the mold is cut out (fourth step).
以上に述べた実施例から明らかなように、この発明の方
法によれば、通気孔が極めて簡単な工程により成形でき
るので、通気孔を鋳型の所望の部位に安易に設けること
ができる。したがって造型能率の向上ばかりでなく、共
用通気孔の採用に伴なう鋳物製品の欠陥の発生も防止す
ることができた。また、鋳型への注湯によって型材が燃
焼消失したあとは、揚り、押湯等の作用も兼ねさせるこ
とができる。As is clear from the embodiments described above, according to the method of the present invention, the vent hole can be formed through an extremely simple process, so the vent hole can be easily provided at a desired portion of the mold. Therefore, not only was it possible to improve molding efficiency, but it was also possible to prevent defects in cast products due to the use of common ventilation holes. Further, after the mold material is burnt and destroyed by pouring the metal into the mold, it can also serve as a fryer, a riser, etc.
なお、消失性通気孔用型材の形成材料としては、鋳型注
湯の際迅速に燃焼消失する性質を有するものであればよ
く、例えば前記実施例のようにいわゆるフルモールド法
で慣用されているポリスヂレンに発泡剤を含浸させたも
ののほか、一般的に発泡性を有する合成樹脂材を用いる
ことができる。Note that the material for forming the mold material for the fugitive vent hole may be any material that has the property of burning and disappearing quickly during pouring into the mold, such as polystyrene, which is commonly used in the so-called full mold method as shown in the above example. In addition to those impregnated with a foaming agent, synthetic resin materials that generally have foaming properties can be used.
また、この発明の方法の実施に際しては、発泡合成樹脂
材料を用いて、通気孔用として、またこれを揚り、押湯
等として兼用する場合にも、それぞれ予め定められた形
状、寸法に成形したものを所要個数準備しておくと便利
である。通気孔用型材に設けた中空孔は、型材を模型本
体の取り付は用台座に嵌合自立させる機能を兼用させる
ことができる。また、通気孔用型材の上面周縁に丸みを
もたせることにより、造型用遮蔽材を吸着させるときに
、その破れを防ぐようにすることができる。In addition, when carrying out the method of the present invention, foamed synthetic resin materials are used to mold them into predetermined shapes and dimensions, both for vent holes and for use as fryers, feeders, etc. It is convenient to prepare the required number of items. The hollow hole provided in the ventilation hole mold material can also serve the function of fitting the mold material into the pedestal for attaching the model body and making it self-supporting. Further, by rounding the upper surface of the vent molding material, it is possible to prevent the molding shielding material from being torn when it is adsorbed.
さらに、予め準備された所定寸法の型材を互に接合して
任意の長さとすることもできる。Furthermore, pre-prepared shapes of predetermined dimensions can be joined to each other to form an arbitrary length.
第１図はこの発明の方法により模型本体の上面に造型用
遮蔽材を吸着被覆させた状態における減圧鋳型の部分縦
断面図、第２図は鋳型枠内に充填材を充虜し被覆用遮蔽
材により覆蓋した状態における部分縦断面図、第３図は
第２図の部分拡大縦断面図、第４図は第３図における両
遮蔽材および閉塞材の重合部分を除去し、残った両遮蔽
材の周縁を接合した状態における部分拡大縦断面図、第
５および第６図は従来の通気孔成形方法を示す部分縦断
面図、第７図は従来の共用通気孔成形方法を示す部分縦
断面図である。
符号の説明
■・・・模型本体、１ａ・・・通気孔用型材取り付は用
台座、２・・・通気孔用型材、２ａ・・・同中空孔、３
・・・閉塞材、４・・・造型用遮蔽材、５・・・鋳型枠
、６・・・充填材、７・・・被覆用遮蔽材、ｌｌａ・・
・通気孔用原型取り付は用台座、１２・・・通気孔用原
型、１３・・・原型用遮蔽材、１４・・・造型用遮蔽材
、２２・・・共用通気孔用原型。Fig. 1 is a partial vertical cross-sectional view of a vacuum mold with a molding shielding material adsorbed and coated on the upper surface of the model body by the method of the present invention, and Fig. 2 is a partial vertical cross-sectional view of a vacuum mold in which the mold flask is filled with a filler material and a covering shielding material is adsorbed and coated on the upper surface of the model body. 3 is a partially enlarged vertical sectional view of FIG. 2, and FIG. 4 is a partial vertical sectional view of the state in which both shielding materials and the occluder in FIG. 5 and 6 are partial longitudinal cross-sectional views showing the conventional method for forming vent holes. FIG. 7 is a partial longitudinal cross-sectional view showing the conventional method for forming common vent holes. It is a diagram. Explanation of symbols■...Model body, 1a...Plinth for attaching mold material for ventilation hole, 2...Mold material for ventilation hole, 2a...Hollow hole, 3
... Closing material, 4... Shielding material for molding, 5... Molding flask, 6... Filling material, 7... Shielding material for coating, lla...
・Plinth for mounting the vent hole prototype, 12... Vent hole prototype, 13... Prototype shielding material, 14... Molding shielding material, 22... Common vent hole prototype.
Claims (4)
覆させる第１工程と、吸着被覆させた前記遮蔽材を介し
て前記模型本体上に鋳型枠を載置して同鋳型枠内に充填
材を充填する第２工程と、前記充填材の上面全体を被覆
用膜状遮蔽材にて覆蓋し前記鋳型枠内を減圧させる第３
工程と、前記各工程を経て形成された鋳型から前記模型
本体を型抜きする第４工程とからなる減圧鋳型造型法に
おいて、前記第１工程に先立って前記模型本体上面の所
定の部位に、その上下方向に貫通する中空孔を有しかつ
その上面が鋳型枠上縁に露呈する消失性通気孔用型材の
下端を位置ぎめ固定し、ついで前記第１ないし第３工程
を経て互に密着した前記両遮蔽材の前記型材中空孔の上
端における重合部分を除去して同中空孔を開口し同重合
部分の周縁を気密に接合したのち、第４工程により型抜
きするようにしたことを特徴とする減圧鋳型造型法。(1) A first step in which a film-like shielding material for modeling is adsorbed and coated on the entire upper surface of the model body, and a mold flask is placed on the model body through the adsorbed and coated shielding material, and the mold flask is placed inside the mold flask. a second step of filling the mold flask with a filler, and a third step of covering the entire upper surface of the filler with a covering film-like shielding material and reducing the pressure inside the mold flask.
and a fourth step of cutting out the model body from the mold formed through each of the above steps. The lower end of the fugitive vent hole mold material having a hollow hole penetrating in the vertical direction and whose upper surface is exposed at the upper edge of the mold flask is positioned and fixed, and then the above-described first to third steps are carried out so that the mold material is brought into close contact with each other. The overlapping portion at the upper end of the hollow hole of the mold material of both shielding materials is removed, the hollow hole is opened, and the periphery of the overlapping portion is airtightly joined, and then the mold is cut out in a fourth step. Vacuum molding method.
成されていることを特徴とする第１項記載の減圧鋳型造
型法。(2) The vacuum mold making method according to item 1, wherein the fugitive vent hole molding material is formed of a foamed synthetic resin material.
型材を模型本体に設けた台座に位置決め固定する際の嵌
合部であることを特徴とする第１項記載の減圧鋳型造型
法。(3) Vacuum mold making according to item 1, characterized in that the lower end of the hollow hole provided in the mold material for evanescent vents is a fitting part when positioning and fixing the mold material to a pedestal provided in the model body. Law.
うにしたことを特徴とする第１項記載の減圧鋳型造型法
。(4) The vacuum mold manufacturing method according to item 1, wherein the upper surface periphery of the fugitive vent hole molding material is rounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60222423A JPS6281245A (en) | 1985-10-04 | 1985-10-04 | Molding method for vacuum casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60222423A JPS6281245A (en) | 1985-10-04 | 1985-10-04 | Molding method for vacuum casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6281245A true JPS6281245A (en) | 1987-04-14 |
| JPH0262350B2 JPH0262350B2 (en) | 1990-12-25 |
Family
ID=16782158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60222423A Granted JPS6281245A (en) | 1985-10-04 | 1985-10-04 | Molding method for vacuum casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6281245A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855466A (en) * | 2016-06-02 | 2016-08-17 | 龙岩盛丰机械制造有限公司 | Brake drum one-casting six-piece V-process casting technological method and brake drum one-casting six-piece V-process casting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50103420A (en) * | 1974-01-23 | 1975-08-15 | ||
| JPS5433223A (en) * | 1977-08-20 | 1979-03-10 | Sintokogio Ltd | Method of molding blind feeder in reducedd pressure molding and airrpassing parts for molding blind feeder portion |
| JPS5489920A (en) * | 1977-12-28 | 1979-07-17 | Daido Steel Co Ltd | Method of forming riser gate in reduced pressure casting process |
-
1985
- 1985-10-04 JP JP60222423A patent/JPS6281245A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50103420A (en) * | 1974-01-23 | 1975-08-15 | ||
| JPS5433223A (en) * | 1977-08-20 | 1979-03-10 | Sintokogio Ltd | Method of molding blind feeder in reducedd pressure molding and airrpassing parts for molding blind feeder portion |
| JPS5489920A (en) * | 1977-12-28 | 1979-07-17 | Daido Steel Co Ltd | Method of forming riser gate in reduced pressure casting process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855466A (en) * | 2016-06-02 | 2016-08-17 | 龙岩盛丰机械制造有限公司 | Brake drum one-casting six-piece V-process casting technological method and brake drum one-casting six-piece V-process casting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0262350B2 (en) | 1990-12-25 |
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