JPH01186241A - Lost wax pattern for casting - Google Patents
Lost wax pattern for castingInfo
- Publication number
- JPH01186241A JPH01186241A JP63010256A JP1025688A JPH01186241A JP H01186241 A JPH01186241 A JP H01186241A JP 63010256 A JP63010256 A JP 63010256A JP 1025688 A JP1025688 A JP 1025688A JP H01186241 A JPH01186241 A JP H01186241A
- Authority
- JP
- Japan
- Prior art keywords
- runner
- main body
- molten metal
- pattern
- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 28
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 7
- 239000000057 synthetic resin Substances 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 abstract description 28
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000919 ceramic Substances 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920006328 Styrofoam Polymers 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000008261 styrofoam Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 101150038956 cup-4 gene Proteins 0.000 description 3
- 239000003779 heat-resistant material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000006082 mold release agent Substances 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
Landscapes
- 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」
本発明は鋳造用消失模型に係り、特に、湯道部分と模型
本体部分とを別々に構成した鋳造用消失模型に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a vanishing model for casting, and particularly to a vanishing casting model in which a runner part and a model main body part are constructed separately.
「従来の技術」
従来の鋳造用消失模型を利用した鋳造方法は、発泡スチ
ロール、発泡ウレタン等の樹脂からなる消失模型を砂型
に埋め込み、該砂型中に溶融金属(以下溶湯という)を
注入することにより、消失模型を気化させ、あるいは燃
焼ガス化させて砂粒の間を通して排出させながら前記溶
湯と置換し、砂型中に消失模型と同一形状の鋳物を得る
ものであって、精密部品等の製造に広く適用されている
。``Prior art'' The conventional casting method using a vanishing model for casting involves embedding a vanishing model made of resin such as styrofoam or urethane foam in a sand mold, and injecting molten metal (hereinafter referred to as molten metal) into the sand mold. , the vanishing model is vaporized or combusted and gasified and replaced with the molten metal while being discharged through the sand grains to obtain a casting having the same shape as the vanishing model in the sand mold, and is widely used in the manufacture of precision parts, etc. Applied.
また、比較的小型の機械部品等を鋳造しようとする場合
、作業能率を向上させるため、第3図に示すように、幹
となる棒状部lに、それぞれ技部2を備えた消失模型本
体3を(すなわち、製造すべき部品そのものに対応する
形状の部分を)それぞれ接着してなる発泡スチロール製
のツリーと呼ばれる消失模型を形成し、このツリーの前
記棒状部lの上部に金属製の湯口カップ4を取り付けて
おき、その後、前記ツリーを型枠5内に配置して砂を充
填して(いわゆる砂込めをして)、砂型6を形成し、該
湯口カップ4から溶融金属(以下溶湯という)を注入し
て鋳物を得る手法が採用されている。In addition, when attempting to cast relatively small mechanical parts, etc., in order to improve work efficiency, as shown in FIG. (that is, parts of shapes corresponding to the parts themselves to be manufactured) are glued together to form a disappearing model called a Styrofoam tree, and a metal sprue cup 4 is attached to the top of the rod-shaped part l of this tree. After that, the tree is placed in a mold 5 and filled with sand (so-called sand filling) to form a sand mold 6, and molten metal (hereinafter referred to as molten metal) is poured from the sprue cup 4. The method used is to obtain castings by injecting.
すなわち前記湯口カップ4から溶湯を注入すると、まず
、棒状部lを構成する発泡スチロールが溶湯の熱によっ
て分解されることにより、該棒状部Iの形状に対応する
湯道が順次形成され、さらに、枝部2に対応する形状の
湯道を介して各模型本体3に溶湯が供給されて、これを
構成する発泡性合成樹脂が溶湯に置換され、砂型6内に
ツリーに対応する形状の鋳物が形成される。That is, when molten metal is injected from the sprue cup 4, first, the Styrofoam constituting the rod-shaped portion I is decomposed by the heat of the molten metal, so that a runner corresponding to the shape of the rod-shaped portion I is sequentially formed. Molten metal is supplied to each model body 3 through a runner having a shape corresponding to the part 2, and the foamable synthetic resin constituting this is replaced with the molten metal, and a casting having a shape corresponding to the tree is formed in the sand mold 6. be done.
「発明が解決しようとする課題」
ところで、上記構造の消失模型を使用する場合、幹とな
る部分に多数の枝を接着し、さらに、模型本体3はもち
ろんのこと、それ以外の幹(付属部分)の部分の表面に
も離型剤を塗布し、さらに、前記接着剤の硬化を待って
砂込めを行う必要があるため、消失模型の製作に手間が
かかるという問題がある。また、鋳造時に模型本体のみ
ならず幹に相当する部分の発泡スチロールをも分解させ
る必要があるから、この発泡スチロールを分解させるこ
とにより生じた炭素、あるいは炭素化合物が部品の表面
に付着して、加炭現象、あるいは炭素残渣による欠陥の
原因となる可能性もなしとじないものであった。"Problem to be Solved by the Invention" By the way, when using a disappearing model with the above structure, a large number of branches are glued to the trunk part, and not only the model body 3 but also other trunks (attached parts) are attached. ) It is also necessary to apply a mold release agent to the surface of the part, and then wait for the adhesive to harden before filling with sand, so there is a problem in that it takes time and effort to produce the disappearing model. In addition, during casting, it is necessary to decompose not only the Styrofoam of the model body but also the part corresponding to the trunk, so carbon or carbon compounds produced by decomposing the Styrofoam may adhere to the surface of the part and cause carburization. There is also the possibility that defects may be caused by carbon residue or carbon residue.
本発明は上記事情に鑑みて提案されたもので、製作が容
易で、かつ、消失時に発生する炭素量を現象・させるよ
うにした消失模型を得ることを目的とするものある。The present invention has been proposed in view of the above-mentioned circumstances, and aims to obtain a vanishing model that is easy to manufacture and that can change the amount of carbon generated during vanishing.
「課題を解決するための手段」
上記目的を達成するため、本発明は、砂型内に埋設され
てキャビティーを形成する鋳造用消失模型を、発泡性合
成樹脂からなる本体部から伸びて湯道を形成する湯道部
と、型に注入された溶湯の通路に前記湯道部を嵌合させ
て取り付ける係合部とから構成し、前記湯道部および係
合部を前記本体部と一体の発泡性合成樹脂により成形す
るようにしたものである。"Means for Solving the Problems" In order to achieve the above object, the present invention provides a casting casting model that is embedded in a sand mold to form a cavity, and extends from a main body made of a foamable synthetic resin to form a runner. and an engaging part that fits and attaches the runner part to a passage for molten metal poured into a mold, and the runner part and the engaging part are integrated with the main body part. It is molded from foamable synthetic resin.
「作用」
上記構成であると、砂型内に埋設されて溶湯の通路とな
る湯道管に設けられた溶湯の放出口などに前記係合部を
嵌合させるという簡単な手順によりツリーを形成するこ
とができる。また、形成されたツリーは、従来のツリー
と同様に砂に埋設して使用され、前記湯道管に溶湯を注
ぐことにより各消失模型本体に溶湯を供給して、該消失
模型本体と置換しながら鋳物を形成することができる。"Function" With the above configuration, a tree is formed by a simple procedure of fitting the engaging portion to a molten metal discharge port provided in a runner pipe that is buried in a sand mold and serves as a path for molten metal. be able to. In addition, the formed tree is used by being buried in sand like a conventional tree, and by pouring molten metal into the runner pipe, molten metal is supplied to each disappearing model body to replace the disappearing model body. Castings can be formed while
「実施例」
以下、第1図および第2図を参照して本発明の一実施例
を説明する。"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
図中符号10は湯道管である。この湯道管lOは砂型に
埋設されて溶湯の通路となるもので、全体として筒状を
なし、使用される溶湯の温度に耐え得る耐熱性を持った
金属、セラミック等の材料により形成されている。また
、湯道管IOは上端が開口され、さらにこの開口部分に
は、湯道管lOと同様の耐熱性材料によりコーン状に形
成された湯口11が接続されている。一方、湯道管IO
の下端には底板12が固着されて湯道を閉鎖するととも
に、該底板12によって湯道管10を砂型内で安定して
支持し得るようになっている。さらに、前記湯道管IO
の側部には、管壁を半径方向に貫通する差し込み口13
が複数設けられている。Reference numeral 10 in the figure is a runner. This runner pipe lO is buried in a sand mold and serves as a passage for the molten metal.It has an overall cylindrical shape and is made of a material such as metal or ceramic that has heat resistance that can withstand the temperature of the molten metal used. There is. Further, the upper end of the runner IO is open, and a sprue 11 formed in a cone shape and made of the same heat-resistant material as the runner IO is connected to this opening. On the other hand, the runner IO
A bottom plate 12 is fixed to the lower end of the sand mold to close the runner, and the bottom plate 12 can stably support the runner 10 within the sand mold. Furthermore, the runner pipe IO
An insertion port 13 that penetrates the tube wall in the radial direction is provided on the side of the tube.
There are several.
また消失模型は、多数の発泡スチロール、発泡ウレタン
等の粒を加熱して膨張さ仕ることにより、金型内面に密
岩させるとともに、相互に融着させながら所定形状に成
形して一体化するようにしたもので、形成すべき鋳物に
対応した形状をなす模型本体14と、この模型本体14
に一体に接続された堰15とから構成されている。前記
堰15は、第2図に示すように、前記差し込み口13の
幅寸法Wおよび高さ寸法りに対応する横断面形状を持ち
、その先端には、前記差し込み口13の周囲の湯道管l
Oと係合して模型本体14を湯道管10に連結する抜は
止め16が形成されている。なお、抜は止め16は、前
記差し込み口13と係合し得るように、幅寸法が前記差
し込み口13と等しく、かつ先端部の高さaお上び基端
部の高さbが前記差し込み口!3の高さhに対してa<
h<bが成立するように設定されている。In addition, the vanishing model is made by heating and expanding a large number of particles of polystyrene foam, urethane foam, etc. to form a dense rock on the inside of the mold, and by melting them together and molding them into a predetermined shape. A model body 14 having a shape corresponding to the casting to be formed;
A weir 15 is integrally connected to the weir 15. As shown in FIG. 2, the weir 15 has a cross-sectional shape corresponding to the width W and height of the insertion port 13, and has a runner pipe around the insertion port 13 at its tip. l
A pullout stop 16 is formed which engages with O to connect the model body 14 to the runner pipe 10. Note that the removal stopper 16 has a width equal to that of the insertion port 13 and a height a of the distal end and a height b of the base end thereof so that it can engage with the insertion port 13. mouth! a< for the height h of 3
It is set so that h<b holds true.
以上のように構成された消失模型は、各差し込み口13
にそれぞれ抜は止め16を係合させながら模型本体14
を取り付けることによりツリーとされ、さらに、模型本
体14および堰I5の表面に離型剤を塗布した後(なお
離型剤は取り付は前に塗布しておいてもよい)、従来の
消失模型と同様に砂込めされて使用される。また、湯道
管10の基端部に底板12が取り付けられ、また、幹と
なる湯道管10が消失模型に比して十分に大きな重量を
持つため、砂込めをすべく型枠内に配置した際に極めて
安定性が良く、したがって、砂込め時に位置ずれを生じ
ることが少ない。The disappearance model configured as described above has each insertion port 13.
While engaging the pull-out stops 16 respectively, remove the model body 14.
After applying a mold release agent to the surface of the model body 14 and the weir I5 (the mold release agent may be applied before installation), the conventional disappearing model is made. It is used filled with sand in the same way. In addition, a bottom plate 12 is attached to the base end of the runner pipe 10, and since the main runner pipe 10 has a sufficiently large weight compared to the disappearing model, it is necessary to place it in the formwork in order to fill it with sand. It is extremely stable when placed, and therefore is less likely to shift during sand filling.
そして、砂込め後萌記湯口Itから溶湯を注ぎ込むと、
この溶湯が湯道管10内を通って抜は止め16に相当す
る部分の発泡樹脂を分解しこれを消失させながら、各差
し込み口13から外部へ放出される。放出された溶湯は
、堰15に相当する部分の発泡樹脂を分解しながら模型
本体14に相当する部分に至り、この部分の発泡樹脂を
分解してこれと置換されながら砂型内のキャビティーに
対応する形状に成形される。また、溶湯と接触すること
により分解された発泡樹脂は、気体としての炭化水素、
あるいは、これが分解されることにより生じた二酸化炭
素、−酸化炭素、水(水蒸気)として、砂型を構成する
砂粒を間を通って大気中に放出される。Then, after pouring the sand, pour the molten metal from the Moeki sprue It.
This molten metal passes through the runner pipe 10 and is discharged to the outside from each insertion port 13 while decomposing and disappearing the foamed resin in the portion corresponding to the stopper 16. The released molten metal decomposes the foamed resin in the part corresponding to the weir 15 and reaches the part corresponding to the model body 14, and then decomposes the foamed resin in this part and replaces it, filling the cavity in the sand mold. It is molded into a shape. In addition, the foamed resin decomposed by contact with the molten metal produces hydrocarbons as a gas,
Alternatively, the carbon dioxide, carbon oxide, and water (steam) produced by decomposition of this material are released into the atmosphere through the sand grains that make up the sand mold.
「発明の効果」
以上の説明で明らかなように、本発明は下記の効果を奏
する。"Effects of the Invention" As is clear from the above description, the present invention has the following effects.
a、砂型に埋設されて溶湯の通路となる湯道管に消失模
型を順次取り付けるだけで容易にツリーを形成すること
ができ、消失模型の製作に要する労力が軽減される。a. A tree can be easily formed by sequentially attaching the disappearing models to the runner pipes that are buried in the sand mold and serve as passages for the molten metal, and the labor required for producing the disappearing models is reduced.
b、湯道管か耐熱性材料で形成されているため、砂型中
に存在する発泡性合成樹脂の蛍か少なくなり、したがっ
て分解すべき炭素の量も少なくなって、残存炭素に起因
する各種の欠陥が生じる可能性が低くなる。b. Because the runners are made of heat-resistant material, there is less foaming of the foamable synthetic resin in the sand mold, and therefore the amount of carbon to be decomposed is also reduced, reducing the amount of various types of carbon caused by residual carbon. Defects are less likely to occur.
C0湯道管を構成する耐熱性材料は、一般に発泡性樹脂
より重量が大きいから、ツリーが安定し、砂込めに際し
て転倒したり、位置ずれを生じたりすることが少ない。Since the heat-resistant material constituting the C0 runner pipe is generally heavier than the foamed resin, the tree is stable and less likely to fall over or become misaligned when filled with sand.
第1図および第2図は本発明の一実施例を示すもので、
第1図はツリーの外観を示す斜視図、第2図は湯道管お
よび模型本体の構造を詳細に示した拡大斜視図、第3図
は従来例の消失模型を砂型に埋設した状態を示す断面図
である。
10・・・・・・湯道管(溶湯の通路)、11・・・・
・・湯口、12・・・・・・底板、13・・・・・・差
し込み口、I4・・・・・・模型本体、15・・・・・
・堰、16・・・・・・抜は止め。1 and 2 show an embodiment of the present invention,
Figure 1 is a perspective view showing the appearance of the tree, Figure 2 is an enlarged perspective view showing the structure of the runner pipe and the model body in detail, and Figure 3 is a diagram showing a conventional disappearing model buried in a sand mold. FIG. 10... runner pipe (molten metal passage), 11...
... Sprue, 12... Bottom plate, 13... Inlet, I4... Model body, 15...
・Weir, 16... Stop pulling out.
Claims (1)
る湯道部と、型に注入された溶湯の通路に前記湯道部を
嵌合させて取り付ける係合部とから構成され、前記湯道
部および係合部も前記本体部と一体の発泡性合成樹脂に
より成形されたことを特徴とする鋳造用消失模型。It consists of a runner part that extends from a main body made of foamable synthetic resin to form a runner, and an engaging part that fits and attaches the runner part to a passage for molten metal poured into a mold. A vanishing model for casting, characterized in that a channel portion and an engaging portion are also molded from a foamable synthetic resin integral with the main body portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63010256A JPH01186241A (en) | 1988-01-20 | 1988-01-20 | Lost wax pattern for casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63010256A JPH01186241A (en) | 1988-01-20 | 1988-01-20 | Lost wax pattern for casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01186241A true JPH01186241A (en) | 1989-07-25 |
Family
ID=11745236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63010256A Pending JPH01186241A (en) | 1988-01-20 | 1988-01-20 | Lost wax pattern for casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01186241A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001056722A1 (en) * | 2000-02-02 | 2001-08-09 | Trucast Limited | Investment casting method and apparatus |
KR100675526B1 (en) * | 2005-02-24 | 2007-01-29 | (주)금화엘이이 | Casting method for manufacturing preciousmetal ornaments |
CN108057851A (en) * | 2017-12-25 | 2018-05-22 | 霍山县忠福机电科技有限公司 | A kind of new casting method and device |
-
1988
- 1988-01-20 JP JP63010256A patent/JPH01186241A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001056722A1 (en) * | 2000-02-02 | 2001-08-09 | Trucast Limited | Investment casting method and apparatus |
KR100675526B1 (en) * | 2005-02-24 | 2007-01-29 | (주)금화엘이이 | Casting method for manufacturing preciousmetal ornaments |
CN108057851A (en) * | 2017-12-25 | 2018-05-22 | 霍山县忠福机电科技有限公司 | A kind of new casting method and device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3964534A (en) | Casting method with a vacuum bonded dry sand core | |
JPS61502245A (en) | Casting of metal products | |
GB1401239A (en) | Casting method | |
JPH01118417A (en) | Method for foam-molding foam integral with skin material | |
US3157924A (en) | Method of casting | |
US4958674A (en) | Full mold casting process and device | |
JPH01186241A (en) | Lost wax pattern for casting | |
AU672437B2 (en) | Lost foam process for casting stainless steel | |
US6845810B2 (en) | Lost-foam casting apparatus for improved recycling of sprue-metal | |
US4848439A (en) | Method of countergravity casting | |
US3526266A (en) | Mold for the casting of metals | |
JP2000326050A (en) | Casting method of porous metallic material | |
US6715536B1 (en) | Full mold casting process and device for a differential case | |
JP2934000B2 (en) | Manufacturing method of manhole frame by loss casting method | |
JPS60154015A (en) | Integral expansion molding of head rest | |
JPH01202338A (en) | Casting method and lost foam pattern | |
SU1764768A1 (en) | Method and mold for producing cast objects from gasified patterns div-process | |
JPS63741Y2 (en) | ||
JPH01237046A (en) | Method for casting lost foam pattern | |
JP2548641B2 (en) | Molding method for hollow products | |
JPS6434573A (en) | Full mold casting method | |
JPS5854989Y2 (en) | foam mold | |
JPH0647485A (en) | Lost foam pattern casting method for pipe with branched pipe | |
JPH01186242A (en) | Casting device | |
JPH05285920A (en) | Slip casting of object having opening |