JPH11192535A - Manufacture of sleeve for hot-top - Google Patents
Manufacture of sleeve for hot-topInfo
- Publication number
- JPH11192535A JPH11192535A JP12425598A JP12425598A JPH11192535A JP H11192535 A JPH11192535 A JP H11192535A JP 12425598 A JP12425598 A JP 12425598A JP 12425598 A JP12425598 A JP 12425598A JP H11192535 A JPH11192535 A JP H11192535A
- Authority
- JP
- Japan
- Prior art keywords
- feeder
- sleeve
- guide port
- manufacturing
- resin foam
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 33
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims abstract description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims abstract description 4
- 239000006260 foam Substances 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229920005992 thermoplastic resin Polymers 0.000 claims description 12
- 239000005011 phenolic resin Substances 0.000 claims description 7
- 239000012948 isocyanate Substances 0.000 claims description 6
- 150000002513 isocyanates Chemical class 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000004005 microsphere Substances 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 239000004088 foaming agent Substances 0.000 claims description 2
- 150000003512 tertiary amines Chemical class 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 2
- 238000000576 coating method Methods 0.000 claims 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 239000011859 microparticle Substances 0.000 claims 1
- 229920001568 phenolic resin Polymers 0.000 claims 1
- 238000009423 ventilation Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 4
- 230000020169 heat generation Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 1
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 6
- 239000011324 bead Substances 0.000 description 3
- 229920006248 expandable polystyrene Polymers 0.000 description 3
- 235000013024 sodium fluoride Nutrition 0.000 description 3
- 239000011775 sodium fluoride Substances 0.000 description 3
- 235000010344 sodium nitrate Nutrition 0.000 description 3
- 239000004317 sodium nitrate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- WDPYDDUVWLUIDM-UHFFFAOYSA-N ethyl carbamate;phenol Chemical compound CCOC(N)=O.OC1=CC=CC=C1 WDPYDDUVWLUIDM-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000003832 thermite Substances 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鋳物鋳造の際に押
湯を保温あるいは加熱して収容するためのスリーブを製
造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a sleeve for holding or heating a riser during casting.
【０００２】[0002]
【従来の技術】鋳物製品の生産においては、鋳型（生
型）に流し込んだ溶融金属の冷却工程においてその収縮
により内部に引け巣が生じないように、冷却工程の間じ
ゅう常に引け巣の体積に相当する量の溶融金属（以下、
押湯という。）を補給している。余分な押湯は製品が冷
えて型ばらしされた後に切断除去されるものであるた
め、製品の歩止まりを向上させるには、押湯は引け巣の
体積をわずかにこえる程度の量が最適である。そのため
従来、製品の鋳型（生型）４の上部に、押湯を保温ある
いは加熱して鋳型（生型）中に常に補給しうるように、
スリーブを設けてその中に押湯を収容している。このよ
うなスリーブとして種々の内部形状のものが提案されて
いるが、例えば、押湯収容部１ａの内部が円筒形で押湯
誘導口１ｂにネックダウンコア３の設けられた押湯用ス
リーブが一般に広く知られている（図７参照）。また、
押湯誘導口を備えた押湯収容部が球状の二つ割れの押湯
用スリーブも公知である。これらの押湯用スリーブは、
押湯を保温あるいは加熱できるように、断熱保温材料あ
るいは発熱材料でつくられている。具体的には、断熱保
温材料としては繊維やアルミナ粉末が用いられ、発熱材
料としてはアルミニウム粉末と酸化鉄と酸化剤が耐火骨
材と共に用いられ、これらを水ガラスやシェルモールド
用ノボラック型又はレゾール型フェノール樹脂などの粘
結剤と混練し成形して硬化させている。2. Description of the Related Art In the production of cast products, the volume of shrinkage cavities is constantly maintained during the cooling process so that shrinkage cavities do not occur inside the molten metal poured into a mold (green mold) due to shrinkage in the cooling process. An equivalent amount of molten metal (hereinafter,
It is called a hot water. ). The excess feeder is cut and removed after the product cools and is unmolded.To improve the product yield, the feeder should be slightly larger than the shrinkage cavity. is there. For this reason, conventionally, the upper part of the mold (raw mold) 4 of the product is heated or heated so that the feeder can always be replenished into the mold (raw mold).
A sleeve is provided to house the feeder therein. Various types of sleeves have been proposed as such a sleeve. For example, there is a sleeve for a feeder in which the inside of a feeder housing 1a is cylindrical and a neck down core 3 is provided at a feeder guide port 1b. It is generally widely known (see FIG. 7). Also,
Also known is a two-part feeder sleeve having a feeder receiving port provided with a feeder guide port and having a spherical shape. These feeder sleeves are
It is made of an adiabatic heat insulating material or a heat generating material so that the riser can be kept warm or heated. Specifically, fiber or alumina powder is used as a heat insulating material, and aluminum powder, iron oxide, and an oxidizing agent are used together with a refractory aggregate as a heat generating material. It is kneaded with a binder such as a mold phenol resin, molded and cured.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、例えば
水ガラスを粘結剤として使用した場合には、ＣＯ2 で通
気して成形品を硬化させた後、硬化したスリーブを乾燥
炉中で更に約２００℃で４時間ほど乾燥させなければ、
実用的な強度の押湯用スリーブが得られない。また、粘
結剤としてシェルモールド用ノボラック型又はレゾール
型フェノール樹脂を使用した場合にも、成形したのち乾
燥炉中で約２００℃で４時間ほど乾燥させなければ、実
用的な強度の押湯用スリーブを得ることができない。そ
のため、樹脂発泡成形体は約２００℃で加熱すると変形
などするため、従来の押湯用スリーブの製造には樹脂発
泡成形体を使用することができなかった。However, when water glass is used as a binder, for example, after the molded article is cured by ventilating with CO 2 , the cured sleeve is further placed in a drying oven for about 200 hours. If not dried for 4 hours at ℃
A feeder sleeve of practical strength cannot be obtained. In addition, even when a novolak-type or resol-type phenol resin for shell mold is used as a binder, unless it is molded and then dried in a drying furnace at about 200 ° C. for about 4 hours, a practically-strength feeder is used. I can't get a sleeve. For this reason, the resin foam molded article deforms when heated at about 200 ° C., so that the resin foam molded article could not be used for manufacturing a conventional feeder sleeve.
【０００４】本発明の目的は、高温で長時間乾燥する工
程を行わなくても実用的な性能を有する一体的な押湯用
のスリーブを簡易に製造する方法を提供することであ
る。[0004] It is an object of the present invention to provide a method for easily manufacturing an integral feeder sleeve having practical performance without performing a step of drying at a high temperature for a long time.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するため
に、本発明の押湯誘導口と押湯収容部とを備えた押湯用
スリーブの製造方法は、樹脂発泡成形体の全表面に耐火
物粉末とウレタン系粘結剤とを含有する混合物を被覆し
硬化させて押湯を内部に収容する断熱保温壁を形成し、
次いで前記断熱保温壁の一部を取り除いて押湯誘導口を
形成すること、を特徴とする。In order to achieve the above-mentioned object, a method for manufacturing a feeder sleeve having a feeder guide port and a feeder housing according to the present invention is provided on the entire surface of a resin foam molded article. Forming a heat-insulating and heat-insulating wall for covering and hardening the mixture containing the refractory powder and the urethane-based binder, and containing the riser therein;
Next, a part of the heat insulating wall is removed to form a feeder guide port.
【０００６】本発明の押湯誘導口と押湯収容部とを備え
た押湯用スリーブの製造方法は、樹脂発泡成形体の全表
面にアルミニウム粉末及び／又はマグネシウム粉末と酸
化鉄と酸化剤と助燃剤と耐火物粉末とウレタン系粘結剤
とを含有する混合物を被覆し硬化させて押湯を内部に収
容する発熱壁を形成し、次いで前記発熱壁の一部を取り
除いて押湯誘導口を形成すること、を特徴とする。The method for manufacturing a feeder sleeve provided with a feeder guide port and a feeder housing according to the present invention is characterized in that an aluminum powder and / or a magnesium powder, iron oxide and an oxidizing agent are formed on the entire surface of a resin foam molded article. A mixture containing a combustion aid, a refractory powder, and a urethane binder is coated and cured to form a heat generating wall for housing a feeder therein, and then a part of the heat generating wall is removed to remove a feeder inlet. Is formed.
【０００７】本発明の押湯誘導口と押湯収容部とを備え
た押湯用スリーブの製造方法は、樹脂発泡成形体の押湯
誘導口を構成すべき表面を除く全表面に、耐火物粉末と
ウレタン系粘結剤とを含有する混合物を被覆し硬化させ
て、押湯誘導口と押湯収容部とを構成する断熱保温壁を
形成すること、を特徴とする。The method for manufacturing a feeder sleeve provided with a feeder guide port and a feeder container according to the present invention provides a method for manufacturing a resin foam molded article having a refractory material on all surfaces except for the surface which is to constitute the feeder guide port. It is characterized in that a mixture containing a powder and a urethane binder is coated and cured to form a heat insulating and heat retaining wall constituting a feeder guide port and a feeder container.
【０００８】本発明の押湯誘導口と押湯収容部とを備え
た押湯用スリーブの製造方法は、樹脂発泡成形体の押湯
誘導口を構成すべき表面を除く全表面に、アルミニウム
粉末及び／又はマグネシウム粉末と酸化鉄と酸化剤と助
燃剤と耐火物粉末とウレタン系粘結剤とを含有する混合
物を被覆し硬化させて、押湯誘導口と押湯収容部とを構
成する発熱壁を形成すること、を特徴とする。The method for manufacturing a feeder sleeve provided with a feeder guide port and a feeder accommodating portion according to the present invention is a method for manufacturing a resin foam molded article, comprising: And / or a mixture containing magnesium powder, iron oxide, an oxidizing agent, an auxiliary agent, a refractory powder, and a urethane binder, which is hardened to form a feeder guide port and a feeder container. Forming a wall.
【０００９】更に本発明は、前記の各押湯用スリーブの
製造方法であって、前記押湯誘導口に更にネックダウン
コアを設ける。Further, the present invention relates to a method of manufacturing each of the feeder sleeves described above, wherein a neck down core is further provided at the feeder guide port.
【００１０】[0010]
【発明の実施の形態】本発明における樹脂発泡成形体
は、溶融金属の熱で溶融あるいは消失する樹脂を発泡、
成形して押湯収容部と押湯誘導口とをそれぞれなす部分
を備えた成形体である。このような樹脂としては、ポリ
スチレン、ポリメタクリル酸メチル、ポリエチレン等の
熱可塑性樹脂が好適である。更に、熱可塑性樹脂中に発
泡剤を内包した微小体を所望の形状、大きさの型内で発
泡、膨張させ相互に融着させた樹脂発泡成形体が最適で
ある。BEST MODE FOR CARRYING OUT THE INVENTION The resin foam molded article of the present invention foams a resin that melts or disappears due to the heat of a molten metal.
It is a molded article provided with portions that are formed to form a feeder storage section and a feeder guide port, respectively. As such a resin, a thermoplastic resin such as polystyrene, polymethyl methacrylate, or polyethylene is preferable. Further, a resin foam molded article obtained by foaming and expanding a minute body in which a foaming agent is included in a thermoplastic resin in a mold having a desired shape and size and fusing them together is most suitable.
【００１１】この樹脂発泡成形体の外部形状は、ドーム
形、コップ形、円柱形、球形などの種々の形状であって
よいが、同一体積のうちで最も熱拡散面積が小さい、す
なわち、体積と表面積の比で示されるモジュラスが最も
大きくなる球形（但し、押湯誘導口を構成すべき部分を
除く。）が最も好ましい。溶湯金属が同じ場合には、そ
の凝固時間はモジュラスによって定まるからである。The external shape of the resin foam molded article may be various shapes such as a dome shape, a cup shape, a columnar shape, a spherical shape, etc., but the heat diffusion area is the smallest in the same volume, that is, the volume is smaller than the volume. A spherical shape having the largest modulus expressed by the ratio of the surface areas (excluding the portion that should constitute the feeder guide port) is most preferable. This is because when the molten metal is the same, the solidification time is determined by the modulus.
【００１２】樹脂発泡成形体の表面に被覆する混合物
は、耐火物粉末（例えば、シラスバルーンなどのアルミ
ナ系中空微小球、砂）とウレタン系粘結剤（例えば好適
には、フェノール樹脂とイソシアネート硬化剤とからな
るフェノールウレタン系粘結剤）とからなる場合には押
湯を断熱保温し、これらに更にアルミニウム粉末及び／
又はマグネシウム粉末（好適にはアルミニウム粉末）と
酸化鉄と酸化剤（例えば硝酸ナトリウム）と助燃剤（例
えばフッ化ナトリウム）とからなる場合にはスリーブ自
体がテルミット反応により発熱して溶湯を加熱して、ス
リーブ内に押湯を収容することができる。耐火物粉末の
うちアルミナ系中空微小球、特にシラスバルーンは、実
用的な強度を備えているだけでなく軽量の断熱保温壁又
は発熱壁を安価に形成することができるので、更に好適
である。The mixture to be coated on the surface of the resin foam molded article is composed of a refractory powder (eg, alumina-based hollow microspheres such as shirasu balloon, sand) and a urethane-based binder (eg, preferably a phenol resin and an isocyanate-cured resin). Phenol urethane-based binder comprising a heat-insulating agent), the feeder is insulated and kept warm, and aluminum powder and / or
Alternatively, when the powder is composed of magnesium powder (preferably aluminum powder), iron oxide, an oxidizing agent (eg, sodium nitrate), and a combustion aid (eg, sodium fluoride), the sleeve itself generates heat by a thermite reaction to heat the molten metal. The feeder can be accommodated in the sleeve. Among the refractory powders, alumina-based hollow microspheres, particularly shirasu balloons, are more preferable because they not only have practical strength but also can form a lightweight heat-insulating wall or a heat-generating wall at low cost.
【００１３】本発明においては、まず、樹脂発泡成形体
の（押湯誘導口を構成すべき部分を除いた）一部又は全
部の表面に、前記混合物を好適には型内で被覆し、更に
好適には第３級アミン等の触媒を添加あるいはガス化し
て通気し硬化させて、断熱保温壁又は発熱壁を形成す
る。樹脂発泡成形体の全表面に壁を形成した場合には、
その一部を切断などして取り除き、押湯誘導口を形成す
る。押湯誘導口には、製品鋳型への設置の容易化と、型
ばらし後に冷えた押湯（部分）を切断しやすいように、
更にネックダウンコアを接着などにより設けることが好
ましい。形成された断熱保温壁、発熱壁は通気性があ
り、押湯がスリーブ内に入ったとき、樹脂発泡成形体の
燃焼ガスや空気は速やかにスリーブ外に排出される。In the present invention, first, the mixture is preferably coated in a mold on a part or all of the surface of the resin foam molded article (excluding the portion that constitutes the feeder guide port). Preferably, a catalyst such as a tertiary amine is added or gasified and aerated and cured to form a heat insulating wall or a heat generating wall. When walls are formed on the entire surface of the resin foam molded article,
A part thereof is removed by cutting or the like to form a feeder guide port. The feeder guide port is designed to facilitate installation on the product mold and to cut the cold feeder (part) after unmolding.
Further, it is preferable to provide a neck down core by bonding or the like. The formed heat-insulating and heat-insulating wall and the heat-generating wall have air permeability, and when the feeder enters the sleeve, the combustion gas and air of the resin foam molded body are quickly discharged out of the sleeve.
【００１４】[0014]
【実施例】以下、本発明を更に詳しく説明する。実施例１ 図１は、本発明の実施例１における樹脂発泡成形体を成
形するための二つ割れ型の側断面図である。図２は、本
発明の実施例１の押湯用スリーブを製造するための二つ
割れ型に樹脂発泡成形体を設置した場合の側断面図であ
る。図３は、本発明の実施例１の押湯用スリーブの側断
面図である。発泡性ポリスチレンビーズ（三菱油化バデ
ィシュ（株）製ＦＭＣ−２５０）３．５ｇを図１の型６
のキャビティー７に充填し１１５℃で加熱して、直径７
ｃｍの球形の押湯収容部を構成すべき部分（容積１９
８．７ｃｍ3 、表面積１７５．９ｃｍ2 、密度０．０１
９ｇ／ｃｍ3 ）１ａと押湯誘導口を構成すべき部分１ｂ
からなる熱可塑性樹脂発泡成形体１を製造した。次に、
樹脂発泡成形体１の押湯誘導口１ｂを構成すべき表面に
空隙が存在しないように、この熱可塑性樹脂発泡成形体
１をスリーブ製造用の型８のキャビティー９に設置した
（図２参照）。このキャビティー９は前記成形体１より
一まわり大きく、キャビティー９の空隙に発熱壁を構成
すべき混合物を充填した。この混合物は、アルミニウム
粉末５ｇと酸化鉄１ｇと硝酸ナトリウム１ｇとフッ化ナ
トリウム１ｇとシラスバルーン（三機化工建設（株）製
サンキライト）９２ｇとをよく混合し、この中に更にフ
ェノール樹脂１．５ｇとイソシアネート硬化剤１．５ｇ
とを加えて充分に混合したものである。そして、このキ
ャビティー９内に充填した混合物にトリエチルアミンの
蒸気を常温で通気して、この充填した混合物を常温で硬
化させ、押湯用スリーブを製造した。更に、このスリー
ブの押湯誘導口に、中心に押湯誘導口とほぼ同じ大きさ
の円形の穴を設けたネックダウンコア３を接着した。こ
のネックダウンコア３は、シラスバルーンとフェノール
樹脂とイソシアネート硬化剤との混合物を型中でトリエ
チルアミンの蒸気を通気して硬化させたものである。得
られたネックダウンコア付き押湯用スリーブを使用し
て、注湯試験を行った。発熱壁を形成する混合物の組
成、及び製造した押湯用スリーブの性状及び注湯試験結
果をまとめて表１に示す。The present invention will be described in more detail below. Example 1 FIG. 1 is a side sectional view of a split mold for molding a resin foam molded article according to Example 1 of the present invention. FIG. 2 is a side sectional view when a resin foam molded body is installed in a two-piece mold for manufacturing the feeder sleeve of Example 1 of the present invention. FIG. 3 is a side sectional view of the feeder sleeve according to the first embodiment of the present invention. 3.5 g of expandable polystyrene beads (FMC-250 manufactured by Mitsubishi Yuka Badish Co., Ltd.)
And heated at 115 ° C. to a diameter of 7
cm to form a spherical feeder container (volume 19)
8.7 cm 3 , surface area 175.9 cm 2 , density 0.01
9g / cm 3 ) 1a and part 1b to constitute feeder guide port
Was produced. next,
The foamed thermoplastic resin article 1 was placed in the cavity 9 of the mold 8 for producing a sleeve so that no voids existed on the surface of the foamed resin article 1 where the feeder guide port 1b was to be formed (see FIG. 2). ). The cavity 9 was one size larger than the molded body 1, and the cavity 9 was filled with a mixture to form a heating wall. This mixture was mixed well with 5 g of aluminum powder, 1 g of iron oxide, 1 g of sodium nitrate, 1 g of sodium fluoride, and 92 g of Shirasu balloon (Sankylite manufactured by Sanki Kako Construction Co., Ltd.). 5g and isocyanate curing agent 1.5g
And fully mixed. Then, triethylamine vapor was passed through the mixture filled in the cavity 9 at room temperature, and the filled mixture was cured at room temperature to produce a feeder sleeve. Further, a neck down core 3 having a circular hole having a size substantially the same as that of the feeder guide port was attached to the center of the feeder guide port of the sleeve. The neck-down core 3 is obtained by curing a mixture of a shirasu balloon, a phenol resin, and an isocyanate curing agent by passing triethylamine vapor through the mold. A pouring test was performed using the obtained sleeve for a feeder with a neck-down core. Table 1 summarizes the composition of the mixture forming the heating wall, the properties of the manufactured feeder sleeve, and the results of the pouring test.
【００１５】〔注湯試験〕容積１．２６リットルの製品
鋳型（生型）４の上部に、ネックダウンコア３付き押湯
用スリーブを設置し、押湯が発熱壁２内を満たすように
生型４内に１６２０℃の溶融金属（鋳鋼ＳＣＷ４８０）
を注湯して、押湯用スリーブの内部の溶融金属が１４９
３℃以下に冷えて凝固するまでの時間を測定した（図６
参照）。[Pouring test] A feeder sleeve with a neck down core 3 is installed on the upper part of a product mold (raw mold) 4 having a capacity of 1.26 liters. 1620 ° C molten metal in mold 4 (cast steel SCW480)
And the molten metal inside the feeder sleeve is reduced to 149.
The time required to cool to 3 ° C. or less and to solidify was measured (FIG. 6).
reference).
【００１６】実施例２ ネックダウンコアを取り付けないこと及び発熱壁を構成
すべき混合物の組成を表１に示すように変更したことを
除いて、実施例１と同様にして押湯用スリーブを製造
し、これを使用して注湯試験を行った。発熱壁を形成す
る混合物の組成、及び製造した押湯用スリーブの性状及
び注湯試験結果をまとめて表１に示す。 Example 2 A feeder sleeve was manufactured in the same manner as in Example 1 except that the neck-down core was not attached and the composition of the mixture constituting the heating wall was changed as shown in Table 1. Then, a pouring test was performed using this. Table 1 summarizes the composition of the mixture forming the heating wall, the properties of the manufactured feeder sleeve, and the results of the pouring test.
【００１７】実施例３ 発泡性ポリスチレンビーズ（三菱油化バディシュ（株）
製ＦＭＣ−２５０）３．５ｇを球形キャビティーを有す
る型内に充填し１１５℃で加熱して、直径７ｃｍの球形
の熱可塑性樹脂発泡成形体１（体積１７９．５ｃｍ3 、
表面積１５３．９ｃｍ2 、密度０．０１９ｇ／ｃｍ3 ）
を製造した。次に、この熱可塑性樹脂発泡成形体１をこ
れより大きい球形キャビティーを有するスリーブ製造用
の型内に設置した。このキャビティーの空隙に発熱壁を
構成すべき混合物を充填した。この混合物は、アルミニ
ウム粉末１５ｇと酸化鉄３ｇと硝酸ナトリウム１ｇとフ
ッ化ナトリウム１ｇとシラスバルーン８０ｇとをよく混
合し、この中に更にフェノール樹脂１．５ｇとイソシア
ネート硬化剤１．５ｇとを加えて充分に混合したもので
ある。そして、キャビティーの空隙にトリエチルアミン
の蒸気を常温で通気して、この充填した混合物を常温で
硬化させ、（内部）熱可塑性樹脂発泡成形体１と（外
部）発熱壁２からなる球状体を製造した。この球状体の
一部を切断し（外部）発熱壁２の一部を取り除いて、押
湯誘導口（を構成すべき部分）を形成して、押湯用スリ
ーブを製造した。図４は、製造した押湯用スリーブの側
断面図である。この押湯用スリーブを使用して注湯試験
を行った。発熱壁を形成する混合物の組成、及び製造し
た押湯用スリーブの性状及び注湯試験結果をまとめて表
１に示す。 Example 3 Expandable polystyrene beads (Mitsubishi Yuka Badish Co., Ltd.)
FMC-250) (3.5 g) was filled in a mold having a spherical cavity and heated at 115 ° C. to form a spherical thermoplastic resin foam 1 having a diameter of 7 cm (volume 179.5 cm 3 ,
Surface area 153.9cm 2 , density 0.019g / cm 3 )
Was manufactured. Next, the thermoplastic resin foam molded article 1 was placed in a mold for producing a sleeve having a larger spherical cavity. The mixture to form the heating wall was filled in the cavity. This mixture was mixed well with 15 g of aluminum powder, 3 g of iron oxide, 1 g of sodium nitrate, 1 g of sodium fluoride, and 80 g of Shirasu balloon, and further added 1.5 g of a phenol resin and 1.5 g of an isocyanate curing agent. They are well mixed. Then, triethylamine vapor is passed through the cavity at room temperature, and the filled mixture is cured at room temperature to produce a spherical body composed of the (internal) thermoplastic resin foam 1 and the (external) heating wall 2. did. A part of this spherical body was cut off (external) and a part of the heat generating wall 2 was removed to form a feeder guide port (portion to be formed), thereby manufacturing a feeder sleeve. FIG. 4 is a side sectional view of the manufactured feeder sleeve. A pouring test was conducted using this sleeve for hot water. Table 1 summarizes the composition of the mixture forming the heating wall, the properties of the manufactured feeder sleeve, and the results of the pouring test.
【００１８】実施例４ 発熱壁を構成すべき混合物の組成を表１に示すように変
更したことを除いて実施例３と同様にして製造した押湯
用スリーブに、実施例１と同様にしてネックダウンコア
を取り付けて、押湯用スリーブを製造した。図５は、製
造した押湯用スリーブの側断面図である。この押湯用ス
リーブを使用して注湯試験を行った。発熱壁を形成する
混合物の組成、及び製造した押湯用スリーブの性状及び
注湯試験結果をまとめて表１に示す。 Example 4 A feeder sleeve manufactured in the same manner as in Example 3 except that the composition of the mixture constituting the heating wall was changed as shown in Table 1, was used in the same manner as in Example 1. The neck down core was attached, and the sleeve for the feeder was manufactured. FIG. 5 is a side sectional view of the manufactured feeder sleeve. A pouring test was conducted using this sleeve for hot water. Table 1 summarizes the composition of the mixture forming the heating wall, the properties of the manufactured feeder sleeve, and the results of the pouring test.
【００１９】実施例５ 発泡性ポリスチレンビーズ（三菱油化バディシュ（株）
製ＦＭＣ−２５０）４．０ｇを型内の頭部が半球状の円
筒形のキャビティーに充填し１１５℃で加熱して、直径
７ｃｍ、長さ１０．３ｃｍの頭部が半球状の円柱形の熱
可塑性樹脂発泡成形体１（体積１９８．７ｃｍ3 、表面
積１７６．９ｃｍ2 、密度０．０２０ｇ／ｃｍ3 ）を製
造した。次に、樹脂発泡成形体１の押湯誘導口１ｂを構
成すべき表面（円柱底面）に空隙が存在しないように、
この熱可塑性樹脂発泡成形体１をスリーブ製造用の型の
内部のキャビティーに設置した。このキャビティーは前
記成形体１より一まわり大きく、キャビティーの空隙に
断熱保温壁２′を構成すべき混合物を充填した。この混
合物は、シラスバルーン１００ｇとフェノール樹脂１．
５ｇとイソシアネート硬化剤１．５ｇとを加えて充分に
混合したものである。そして、キャビティーの空隙にト
リエチルアミンの蒸気を常温で通気して、この充填した
混合物を常温で硬化させ、押湯用スリーブを製造した。
更に、このスリーブの押湯誘導口に、中心に押湯誘導口
とほぼ同じ大きさの円形の穴を設けたネックダウンコア
を接着した。このネックダウンコアは、シラスバルーン
とフェノール樹脂とイソシアネート硬化剤との混合物を
型中でトリエチルアミンの蒸気を通気して硬化させたも
のである。得られたネックダウンコア付き押湯用スリー
ブを使用して、注湯試験を行った。断熱保温壁を形成す
る混合物の組成、及び製造した押湯用スリーブの性状及
び注湯試験結果をまとめて表１に示す。 Example 5 Expandable polystyrene beads (Mitsubishi Yuka Badish Co., Ltd.)
4.0 g of FMC-250) was filled into a cylindrical cavity having a hemispherical head and heated at 115 ° C. to form a hemispherical cylinder having a diameter of 7 cm and a length of 10.3 cm. thermoplastic resin foam molded article 1 (volume 198.7cm 3, surface area 176.9cm 2, density of 0.020 g / cm 3) was prepared. Next, the surface (column bottom) of the resin foam molded body 1 where the feeder guide port 1b is to be formed should be free from voids.
This thermoplastic resin foam molded article 1 was placed in a cavity inside a mold for producing a sleeve. The cavity was one size larger than the molded body 1, and the cavity to be filled with the mixture to constitute the heat insulating wall 2 '. This mixture is composed of 100 g of Shirasu balloon and 1.
5 g and 1.5 g of an isocyanate curing agent were added and mixed well. Then, triethylamine vapor was passed through the cavity at room temperature to cure the filled mixture at room temperature to produce a feeder sleeve.
Further, a neck down core having a circular hole approximately the same size as the feeder guide port was attached to the center of the feeder guide port of the sleeve. This neck-down core is obtained by curing a mixture of a shirasu balloon, a phenol resin, and an isocyanate curing agent by passing triethylamine vapor through the mold. A pouring test was performed using the obtained sleeve for a feeder with a neck-down core. Table 1 summarizes the composition of the mixture forming the heat insulating wall, the properties of the manufactured feeder sleeve, and the results of the pouring test.
【００２０】比較例１ 生型４の上部（の砂の中）に、実施例１と同様にして製
造した体積１９８．７ｃｍ3 の球形熱可塑性樹脂発泡成
形体１を埋め込んで、注湯試験を行った。注湯試験結果
などをまとめて表１に示す。 Comparative Example 1 A spherical thermoplastic resin foam molded article 1 having a volume of 198.7 cm 3 manufactured in the same manner as in Example 1 was embedded in the upper part (in the sand) of the green mold 4, and a pouring test was conducted. went. Table 1 shows the pouring test results and the like.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【発明の効果】以上説明した通り、本発明においては、
樹脂発泡成形体の表面に、耐火物粉末などをウレタン系
粘結剤で高温で長時間加熱することなく硬化させている
ので、変形などすることなく通気性があり実用的な強度
の断熱保温壁又は発熱壁を（樹脂発泡成形体と）一体的
かつ簡易に形成することができる。そして、本発明によ
り製造される押湯用スリーブを製品の鋳型（生型）の上
部に設置して使用すると、溶融金属（押湯）により樹脂
発泡成形体が消失して、断熱保温壁又は発熱壁内に押湯
を収容し保温又は加熱することができるので、鋳物製品
に引け巣が生じないように、その体積をわずかにこえる
程度の量の押湯を使用してこれを収容し生型に供給する
ことができ経済的である。As described above, in the present invention,
Since the refractory powder is cured on the surface of the resin foam molded article with a urethane binder without heating at high temperature for a long time, it is air-permeable without deformation and has practical strength. Alternatively, the heat generating wall can be formed integrally (with the resin foam molded body) integrally and easily. When the feeder sleeve manufactured according to the present invention is used by placing it on the upper part of the mold (raw mold) of the product, the molten metal (feeder) causes the resin foam molded body to disappear, and the heat insulating and heat retaining wall or the heat generation. Since the feeder can be stored in the wall and kept warm or heated, use a feeder whose volume is slightly larger to accommodate the caster so that no shrinkage cavities occur in the cast product. Can be supplied economically.
【図１】 本発明の実施例１における樹脂発泡成形体を
成形するための二つ割れ型の側断面図である。FIG. 1 is a side sectional view of a two-piece mold for molding a resin foam molded article in Example 1 of the present invention.
【図２】 本発明の実施例１の押湯用スリーブを製造す
るための二つ割れ型に樹脂発泡成形体を設置した場合の
側断面図である。FIG. 2 is a side cross-sectional view of a case where a resin foam molded body is installed in a two-piece mold for manufacturing a sleeve for a feeder of Example 1 of the present invention.
【図３】 本発明の実施例１の押湯用スリーブの側断面
図である。FIG. 3 is a side cross-sectional view of a feeder sleeve according to the first embodiment of the present invention.
【図４】 本発明の実施例３の押湯用スリーブの側断面
図である。FIG. 4 is a side sectional view of a feeder sleeve according to a third embodiment of the present invention.
【図５】 本発明の実施例４の押湯用スリーブの側断面
図である。FIG. 5 is a side sectional view of a feeder sleeve according to a fourth embodiment of the present invention.
【図６】 本発明の実施例１の押湯用スリーブを使用し
た注湯試験における製品鋳型及び押湯用スリーブの側断
面図である。FIG. 6 is a side sectional view of a product mold and a feeder sleeve in a pouring test using the feeder sleeve of Example 1 of the present invention.
【図７】 従来の鋳物生産における製品鋳型及び押湯用
スリーブの側断面図である。FIG. 7 is a side sectional view of a product mold and a feeder sleeve in conventional casting production.
１ 熱可塑性樹脂発泡成形体 １ａ 押湯収容部（を構成すべき部分） １ｂ 押湯誘導口（を構成すべき部分） ２ 発熱壁 ２′ 断熱保温壁 ３ ネックダウンコア REFERENCE SIGNS LIST 1 Thermoplastic resin foam molded article 1a Feeder container (part to be constituted) 1b Feeder guide port (part to be constituted) 2 Heating wall 2 'Heat insulating wall 3 Neck down core
Claims (11)
用スリーブの製造方法であって、 樹脂発泡成形体の全表面に耐火物粉末とウレタン系粘結
剤とを含有する混合物を被覆し硬化させて押湯を内部に
収容する断熱保温壁を形成し、次いで前記断熱保温壁の
一部を取り除いて押湯誘導口を形成すること、を特徴と
する前記押湯用スリーブの製造方法。1. A method for manufacturing a feeder sleeve provided with a feeder guide port and a feeder container, wherein the entire surface of the resin foam molded article contains a refractory powder and a urethane binder. Coating and curing the mixture to form an insulated heat retaining wall for housing the feeder therein, and then removing a part of the heat insulating and heat retaining wall to form a feeder guide port, wherein the feeder sleeve is provided. Manufacturing method.
用スリーブの製造方法であって、 樹脂発泡成形体の全表面にアルミニウム粉末及び／又は
マグネシウム粉末と酸化鉄と酸化剤と助燃剤と耐火物粉
末とウレタン系粘結剤とを含有する混合物を被覆し硬化
させて押湯を内部に収容する発熱壁を形成し、次いで前
記発熱壁の一部を取り除いて押湯誘導口を形成するこ
と、を特徴とする前記押湯用スリーブの製造方法。2. A method for manufacturing a feeder sleeve provided with a feeder guide port and a feeder container, wherein aluminum powder and / or magnesium powder, iron oxide and oxidizing agent are formed on the entire surface of the resin foam molded article. A mixture containing a combustion aid, a refractory powder, and a urethane binder is coated and cured to form a heating wall for housing a feeder therein, and then a part of the heating wall is removed to induce a feeder. A method for manufacturing the feeder sleeve, comprising forming a mouth.
用スリーブの製造方法であって、 樹脂発泡成形体の押湯誘導口を構成すべき表面を除く全
表面に、耐火物粉末とウレタン系粘結剤とを含有する混
合物を被覆し硬化させて、押湯誘導口と押湯収容部とを
構成する断熱保温壁を形成すること、を特徴とする前記
押湯用スリーブの製造方法。3. A method for manufacturing a feeder sleeve provided with a feeder guide port and a feeder storage portion, wherein a fire resistant surface is provided on all surfaces of the resin foam molded body except for a surface which should constitute the feeder guide port. Coating the mixture containing the material powder and the urethane binder and curing the mixture to form a heat insulating and heat retaining wall constituting the feeder guide port and the feeder storage section, wherein the feeder sleeve is provided. Manufacturing method.
用スリーブの製造方法であって、 樹脂発泡成形体の押湯誘導口を構成すべき表面を除く全
表面に、アルミニウム粉末及び／又はマグネシウム粉末
と酸化鉄と酸化剤と助燃剤と耐火物粉末とウレタン系粘
結剤とを含有する混合物を被覆し硬化させて、押湯誘導
口と押湯収容部とを構成する発熱壁を形成すること、を
特徴とする前記押湯用スリーブの製造方法。4. A method for manufacturing a feeder sleeve provided with a feeder guide port and a feeder accommodating portion, wherein aluminum is formed on all surfaces of the resin foam molded body except for a surface to constitute the feeder guide port. A mixture containing powder and / or magnesium powder, iron oxide, an oxidizing agent, an auxiliary agent, a refractory powder, and a urethane-based binder is coated and cured to form a feeder guide port and a feeder container. A method for manufacturing the feeder sleeve, wherein a heating wall is formed.
た熱可塑性樹脂微小体を型内で膨張させ相互に融着させ
た熱可塑性樹脂発泡成形体である、請求項１〜４のいず
れか一項に記載の押湯用スリーブの製造方法。5. The resin foam molded article according to claim 1, wherein said resin foam molded article is a thermoplastic resin foam molded article obtained by expanding thermoplastic resin microparticles containing a foaming agent in a mold and fusing them together. A method for producing a feeder sleeve according to claim 1.
である、請求項１〜５のいずれか一項に記載の押湯用ス
リーブの製造方法。6. The method for producing a sleeve for a feeder according to claim 1, wherein the refractory powder is alumina-based hollow microspheres.
る、請求項１〜５のいずれか一項に記載の押湯用スリー
ブの製造方法。7. The method for producing a feeder sleeve according to claim 1, wherein the refractory powder is a shirasu balloon.
脂とイソシアネート硬化剤とを含有するフェノールウレ
タン系粘結剤である、請求項１〜７のいずれか一項に記
載の押湯用スリーブの製造方法。8. The feeder sleeve according to claim 1, wherein the urethane-based binder is a phenol-urethane-based binder containing a phenolic resin and an isocyanate curing agent. Production method.
通気により行う、請求項１〜８のいずれか一項に記載の
押湯用スリーブの製造方法。9. The method for producing a feeder sleeve according to claim 1, wherein the curing is performed by adding a tertiary amine or by ventilation.
形体の外部形状が、押湯誘導口を構成すべき部分を除い
て球形である、請求項１〜９のいずれか一項に記載の押
湯用スリーブの製造方法。10. The foamed resin foam forming the feeder container has an external shape that is spherical except for a portion that is to constitute a feeder guide port. Method for manufacturing a feeder sleeve.
の押湯用スリーブの製造方法であって、 前記押湯誘導口に更にネックダウンコアを設ける、前記
押湯用スリーブの製造方法。11. The method of manufacturing a feeder sleeve according to claim 1, wherein a neck down core is further provided at the feeder guide port. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12425598A JP3989620B2 (en) | 1997-10-28 | 1998-04-17 | Manufacturing method of a sleeve for a hot water |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9-311274 | 1997-10-28 | ||
| JP31127497 | 1997-10-28 | ||
| JP12425598A JP3989620B2 (en) | 1997-10-28 | 1998-04-17 | Manufacturing method of a sleeve for a hot water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11192535A true JPH11192535A (en) | 1999-07-21 |
| JP3989620B2 JP3989620B2 (en) | 2007-10-10 |
Family
ID=26460961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12425598A Expired - Lifetime JP3989620B2 (en) | 1997-10-28 | 1998-04-17 | Manufacturing method of a sleeve for a hot water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3989620B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942233A (en) * | 2015-07-22 | 2015-09-30 | 湖北亚钢金属制造有限公司 | Heating and thermal insulating pouring cup and manufacturing method thereof |
| CN112756557A (en) * | 2020-12-31 | 2021-05-07 | 四川共享铸造有限公司 | Atmospheric pressure spherical sand riser sleeve and manufacturing method thereof |
| JP2023143573A (en) * | 2022-03-24 | 2023-10-06 | 有限会社ファンドリーテック・コンサルティング | Riser and casting method having high molten metal feed efficiency |
-
1998
- 1998-04-17 JP JP12425598A patent/JP3989620B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942233A (en) * | 2015-07-22 | 2015-09-30 | 湖北亚钢金属制造有限公司 | Heating and thermal insulating pouring cup and manufacturing method thereof |
| CN112756557A (en) * | 2020-12-31 | 2021-05-07 | 四川共享铸造有限公司 | Atmospheric pressure spherical sand riser sleeve and manufacturing method thereof |
| JP2023143573A (en) * | 2022-03-24 | 2023-10-06 | 有限会社ファンドリーテック・コンサルティング | Riser and casting method having high molten metal feed efficiency |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3989620B2 (en) | 2007-10-10 |
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