JP2005103548A - Method and device for controlling temperature of mold - Google Patents

Method and device for controlling temperature of mold Download PDF

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Publication number
JP2005103548A
JP2005103548A JP2003330826A JP2003330826A JP2005103548A JP 2005103548 A JP2005103548 A JP 2005103548A JP 2003330826 A JP2003330826 A JP 2003330826A JP 2003330826 A JP2003330826 A JP 2003330826A JP 2005103548 A JP2005103548 A JP 2005103548A
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mold
product cavity
molten metal
point alloy
inner portion
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Minoru Hirata
実 平田
Takeshi Sakai
毅 酒井
Shuji Takasu
修司 高須
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Sintokogio Ltd
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Sintokogio Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for controlling the temperature of a mold, by which a product cavity face of the mold is previously heated with reduced energy consumption. <P>SOLUTION: The method includes: a process wherein a product cavity is formed by joining at least two pieces of molds, a process wherein an outside part is heated by a heating means, a process wherein molten metal is poured into the product cavity while pouring a molten low-melting-point alloy into a space and conducting the heat of the outside part to an inside part via the low-melting-point alloy, a process wherein the heat of the poured molten metal is conducted to the outside part via the molten low-melting-point alloy, and a process wherein the poured molten metal is cooled via the inside part by a cooling means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は金型の温度制御方法およびその装置に係り、より詳しくは金型の製品キャビティ面の温度を制御する方法およびその装置に関する。 The present invention relates to a mold temperature control method and apparatus, and more particularly to a method and apparatus for controlling the temperature of a product cavity surface of a mold.

一般に金型鋳造法においては、注入された溶融金属が金型によって急冷されて鋳造した鋳物の表面がチル化するのを防止するため、金型を予め所定温度に加熱することが行われている。
特開平７−２７６０３７号 In general, in the mold casting method, in order to prevent the injected molten metal from being rapidly cooled by the mold and chilling the cast casting surface, the mold is heated to a predetermined temperature in advance. .
JP-A-7-276037

そして、上述の金型の予熱は、従来、電気ヒータや高温水などの加熱手段によって行われており、そのため、金型本体を加熱するためのエネルギが膨大なものになるなどの問題があった。 And, the above-mentioned mold preheating is conventionally performed by heating means such as an electric heater or high-temperature water, and there is a problem that energy for heating the mold body becomes enormous. .

本発明は上記の事情に鑑みてなされたもので、その目的は、消費エネルギが少ないようにして金型の製品キャビティ面を予め加熱すことが可能な金型の温度制御方法およびその装置を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mold temperature control method and apparatus capable of preheating the product cavity surface of the mold so as to consume less energy. There is to do.

上記の目的を達成するために本発明における金型の温度制御方法は、金属材料で構成されかつ内面に製品キャビティを有する内側部分、およびこの内側部分とで内側部分をほぼ包囲する空間を形成する金属製の外側部分を備えた金型と；前記内側部分を冷却する冷却手段と；前記外側部分を加熱する加熱手段と；を用いて鋳物を鋳造するに当り、前記金型の温度を制御する方法であって、少なくとも２個以上の前記金型を合わせて製品キャビティを画成する工程と、前記外側部分を前記加熱手段によって加熱する工程と、前記空間に溶融状態の低融点合金を注入して前記外側部分の熱を前記低融点合金を介し伝導させて前記内側部分を加熱しながら前記製品キャビティ内に溶融金属を注入する工程と、前記注入された溶融金属の熱を前記溶融状態の低融点合金を介して前記外側部分に伝導する工程と、前記注入された溶融金属を前記冷却手段により前記内側部分を介して冷却する工程と、を含むことを特徴する。 To achieve the above object, the mold temperature control method according to the present invention forms an inner portion made of a metal material and having a product cavity on the inner surface, and a space that substantially surrounds the inner portion with the inner portion. Controlling the temperature of the mold in casting a casting using a mold having a metal outer part; cooling means for cooling the inner part; and heating means for heating the outer part A method in which at least two or more molds are combined to define a product cavity, the outer portion is heated by the heating means, and a molten low melting point alloy is injected into the space. Injecting molten metal into the product cavity while heating the inner portion by conducting heat of the outer portion through the low melting point alloy, and melting the heat of the injected molten metal To comprising the steps of conducting said outer portion via the low melting point alloy state, and a step of cooling through the inner portion by the cooling means the injected molten metal.

なお、本発明においては溶融状態の低融点合金としてこれと同等の機能を有する溶融塩などを含む。
またなお、溶融状態の低融点合金を熱伝導の媒体として用いることにより、金型の内側部分の加熱・冷却速度を緻密に制御することができ、しかも、溶融金属の熱を外側部分に適確に伝導することができ、さらに、内側部分の冷却に方向性を与えることが可能であるため溶融金属の凝固に指向性を付与することができて鋳造欠陥の発生を防止することができ、その上、低融点合金の沸点が溶融金属の温度より高いため、低融点合金が爆発したりすることなく安全である。
加えて、溶融金属の金型への注入前に内側部分を高温にすることができるため注入された溶融金属の流れが良く、超薄肉鋳物の鋳造も可能である。 In addition, in this invention, the molten salt etc. which have a function equivalent to this as a low melting-point alloy of a molten state are included.
Furthermore, by using a molten low melting point alloy as a heat conduction medium, the heating / cooling rate of the inner part of the mold can be precisely controlled, and the heat of the molten metal can be accurately applied to the outer part. In addition, it is possible to give directionality to the cooling of the inner part, so that directivity can be given to the solidification of the molten metal, and the occurrence of casting defects can be prevented. Moreover, since the boiling point of the low melting point alloy is higher than the temperature of the molten metal, the low melting point alloy is safe without exploding.
In addition, since the inner portion can be heated to a high temperature before pouring the molten metal into the mold, the flow of the molten metal injected is good, and casting of an ultra-thin casting is also possible.


以上の説明から明らかなように本発明は、金属材料で構成されかつ内面に製品キャビティを有する内側部分、およびこの内側部分とで内側部分をほぼ包囲する空間を形成する金属製の外側部分を備えた金型と；前記内側部分を冷却する冷却手段と；前記外側部分を加熱する加熱手段と；を用いて鋳物を鋳造するに当り、前記金型の温度を制御する方法であって、少なくとも２個以上の前記金型を合わせて製品キャビティを画成する工程と、前記外側部分を前記加熱手段によって加熱する工程と、前記空間に溶融状態の低融点合金を注入して前記外側部分の熱を前記低融点合金を介し伝導させて前記内側部分を加熱しながら前記製品キャビティ内に溶融金属を注入する工程と、前記注入された溶融金属の熱を前記溶融状態の低融点合金を介して前記外側部分に伝導する工程と、前記注入された溶融金属を前記冷却手段により前記内側部分を介して冷却する工程と、を含むから、消費エネルギが少ないにもかかわらず金型の製品キャビティ面を所要温度に予め加熱すことが可能になり、しかも製品キャビティ面の温度制御を緻密に行うこともできるなどの優れた実用的効果を奏する。
As is apparent from the above description, the present invention includes an inner portion made of a metal material and having a product cavity on the inner surface, and a metal outer portion that forms a space that substantially surrounds the inner portion with the inner portion. A method of controlling the temperature of the mold when casting a casting using: a cooling means for cooling the inner portion; and a heating means for heating the outer portion. Combining a plurality of the molds to define a product cavity; heating the outer portion by the heating means; and injecting a molten low melting point alloy into the space to heat the outer portion. Injecting molten metal into the product cavity while conducting the heat through the low melting point alloy and heating the inner portion; and heat of the injected molten metal through the low melting point alloy in the molten state A step of conducting to the outer portion and a step of cooling the injected molten metal through the inner portion by the cooling means. It is possible to preheat to a required temperature, and there is an excellent practical effect such that the temperature of the product cavity surface can be precisely controlled.

以下、本発明を適用した金型鋳造装置の実施例について図面に基づき詳細に説明する。本金型鋳造装置の金型１は、図１に示すように、金属材料で構成されかつ内面に製品キャビティ２を有する内側部分３、およびこの内側部分３よりも熱容量が大きく構成されかつ前記内側部分３とでこの内側部分３をほぼ包囲する空間４を形成する金属製の外側部分５とで構成してある。また、型合わせされた前記金型１・１には、前記内側部分３・３に対して接触・分離可能に構成されて内側部分３・３を冷却する冷却手段６が付設してある。さらに、前記外側部分５にはこれを加熱する加熱手段としての電気ヒータ７とが装着してある。
Embodiments of a die casting apparatus to which the present invention is applied will be described below in detail with reference to the drawings. As shown in FIG. 1, a mold 1 of the present mold casting apparatus is made of a metal material and has an inner part 3 having a product cavity 2 on the inner surface, and a heat capacity larger than that of the inner part 3 and the inner part. The portion 3 is composed of a metal outer portion 5 that forms a space 4 that substantially surrounds the inner portion 3. In addition, the molds 1 and 1 that are matched with each other are provided with cooling means 6 that is configured to be able to contact and separate from the inner parts 3 and 3 and cool the inner parts 3 and 3. Further, the outer portion 5 is equipped with an electric heater 7 as a heating means for heating it.


次に、上記の金型鋳造装置を用いて鋳物を鋳造する手順について説明する。まず、図１に示すように、電気ヒータ７・７によって予め外側部分５・５を加熱した２個の金型１・１を合わせて製品キャビティ１１を画成し、続いて、
図２に示すように、金型１・１の空間４・４内に溶融状態の低融点合金１２の注入して外側部分５・５の熱を低融点合金１２を介し内側部分３・３に伝導させて内側部分３・３を加熱する。
Next, a procedure for casting a casting using the mold casting apparatus will be described. First, as shown in FIG. 1, a product cavity 11 is defined by combining two molds 1 and 1 in which outer portions 5 and 5 are heated in advance by electric heaters 7 and 7,
As shown in FIG. 2, molten low melting point alloy 12 is injected into spaces 4 and 4 of molds 1 and 1, and heat of outer portions 5 and 5 is transferred to inner portions 3 and 3 through low melting point alloy 12. Heat the inner parts 3 and 3 by conduction.

次いで、図３に示すように、内側部分３・３を加熱しながら製品キャビティ１１内に溶融金属１４を注入して溶融金属１４のチル化を防止し、続いて、図４に示すように、注入された溶融金属１４の熱を溶融状態の低融点合金１２を介して外側部分５・５に伝導して外側部分５・５を加熱する。
こうして、外側部分５・５を加熱することにより、次の鋳造作業における電気ヒータ７・７による外側部分５・５の加熱を大幅に削減することが可能である。この場合、溶融金属１４のレベルは低融点合金１２のそれと同じかまたは低くする。次いで、図５に示すように、製品キャビティ１１内への溶融金属１４の注入完了後、内側部分３・３を介在させて注入された溶融金属１４を冷却手段６により冷却し、溶融金属１４の冷却完了後、図６に示すように、金型１・１を左右に移動させて開くと、所望の鋳物１５を得ることができる。 Next, as shown in FIG. 3, the molten metal 14 is injected into the product cavity 11 while heating the inner portions 3 and 3 to prevent chilling of the molten metal 14, and subsequently, as shown in FIG. The heat of the injected molten metal 14 is conducted to the outer portions 5 and 5 through the low-melting-point alloy 12 in the molten state to heat the outer portions 5 and 5.
Thus, by heating the outer portions 5 and 5, heating of the outer portions 5 and 5 by the electric heaters 7 and 7 in the next casting operation can be greatly reduced. In this case, the level of the molten metal 14 is the same as or lower than that of the low melting point alloy 12. Next, as shown in FIG. 5, after the injection of the molten metal 14 into the product cavity 11 is completed, the molten metal 14 injected through the inner portions 3 and 3 is cooled by the cooling means 6, After the cooling is completed, as shown in FIG. 6, when the molds 1 and 1 are moved left and right and opened, a desired casting 15 can be obtained.

なお、上記の実施例では、低融点合金１２および溶融金属１４の空間４・４内および製品キャビティ１１内へのそれぞれの注入は、それぞれの下方側から行うようにしてあるが、これに限定されるものではなく、上述の金型１を１８０度回転させてそれぞれの注入口を上方に位置させた状態にし、低融点合金１２および溶融金属１４を空間４・４および製品キャビティ１１の上方側からそれぞれ注入してもよいのはもちろんである。 In the above embodiment, the low melting point alloy 12 and the molten metal 14 are injected into the spaces 4 and 4 and the product cavity 11 from the lower side, but the present invention is not limited to this. Instead, the above-described mold 1 is rotated 180 degrees so that the respective injection ports are positioned upward, and the low melting point alloy 12 and the molten metal 14 are placed from above the spaces 4 and 4 and the product cavity 11. Of course, each may be injected.

本発明の一実施例の手順を説明するため説明図である。It is explanatory drawing for demonstrating the procedure of one Example of this invention. 本発明の一実施例の手順を説明するため説明図である。It is explanatory drawing for demonstrating the procedure of one Example of this invention. 本発明の一実施例の手順を説明するため説明図である。It is explanatory drawing for demonstrating the procedure of one Example of this invention. 本発明の一実施例の手順を説明するため説明図である。It is explanatory drawing for demonstrating the procedure of one Example of this invention. 本発明の一実施例の手順を説明するため説明図である。It is explanatory drawing for demonstrating the procedure of one Example of this invention. 本発明の一実施例の手順を説明するため説明図である。It is explanatory drawing for demonstrating the procedure of one Example of this invention.

符号の説明Explanation of symbols


１ 金型

２ 製品キャビティ

３ 内側部分

４ 空間

５ 外側部分

６ 冷却手段

７ 電気ヒータ
1 Mold

2 Product cavity

3 Inside part

4 space

5 outer part

6 Cooling means

7 Electric heater

Claims (2)

金属材料で構成されかつ内面に製品キャビティを有する内側部分、およびこの内側部分とで内側部分をほぼ包囲する空間を形成する金属製の外側部分を備えた金型と；前記内側部分を冷却する冷却手段と；前記外側部分を加熱する加熱手段と；を用いて鋳物を鋳造するに当り、前記金型の温度を制御する方法であって、
少なくとも２個以上の前記金型を合わせて製品キャビティを画成する工程と、
前記外側部分を前記加熱手段によって加熱する工程と、
前記空間に溶融状態の低融点合金を注入して前記外側部分の熱を前記低融点合金を介し伝導させて前記内側部分を加熱しながら前記製品キャビティ内に溶融金属を注入する工程と、
前記注入された溶融金属の熱を前記溶融状態の低融点合金を介して前記外側部分に伝導する工程と、
前記注入された溶融金属を前記冷却手段により前記内側部分を介して冷却する工程と、
を含むことを特徴する金型の温度制御方法。 A mold comprising an inner portion made of a metallic material and having a product cavity on the inner surface and a metal outer portion forming a space substantially surrounding the inner portion with the inner portion; cooling for cooling the inner portion; A method of controlling the temperature of the mold in casting a casting using: means; and heating means for heating the outer portion,
Combining at least two molds to define a product cavity;
Heating the outer portion by the heating means;
Injecting molten metal into the product cavity while injecting molten low melting point alloy into the space and conducting heat of the outer part through the low melting point alloy to heat the inner part;
Conducting heat of the injected molten metal to the outer portion through the molten low melting point alloy;
Cooling the injected molten metal through the inner portion by the cooling means;
A mold temperature control method comprising: 金型の製品キャビティ面の温度を制御するための装置であって、
金属材料で構成されかつ内面に製品キャビティを有する内側部分、およびこの内側部分とで内側部分をほぼ包囲する空間を形成する金属製の外側部分を備えた金型と；
前記内側部分に対して接触・分離可能に構成されて内側部分を冷却する冷却手段と；
前記外側部分に装着されて外側部分を加熱する加熱手段と；
を備えていて、
前記金型を複数組み合わせて画成した製品キャビティに溶融金属を注入して鋳物を鋳造するに当たり、前記空間に溶融状態の低融点合金を注入しこの低融点合金を介して前記外側部分の熱を前記内側部分に、または前記溶融金属の加熱による前記内側部分の熱を前記外側部分にそれぞれ伝導することを特徴する金型の鋳造装置。
An apparatus for controlling the temperature of the product cavity surface of a mold,
A mold comprising an inner portion made of a metallic material and having a product cavity on the inner surface, and an outer portion made of metal forming a space that substantially surrounds the inner portion with the inner portion;
Cooling means configured to be contactable and separable with respect to the inner portion and cooling the inner portion;
Heating means attached to the outer portion for heating the outer portion;
With
When casting molten metal into a product cavity defined by combining a plurality of molds to cast a casting, a molten low melting point alloy is injected into the space, and the heat of the outer portion is passed through the low melting point alloy. A mold casting apparatus, wherein heat is transmitted to the inner part or to the outer part by heating the molten metal to the outer part, respectively.
JP2003330826A 2003-09-24 2003-09-24 Method and device for controlling temperature of mold Pending JP2005103548A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102259179A (en) * 2010-11-25 2011-11-30 比亚迪股份有限公司 Device for controlling temperature of mold and mold having device
WO2012020204A1 (en) * 2010-08-12 2012-02-16 C.T.I.F. -Centre Technique Des Industries De La Fonderie Device for moulding a thin part
JP2013252533A (en) * 2012-06-06 2013-12-19 Japan Steel Works Ltd:The Die apparatus for metal injection-molding machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012020204A1 (en) * 2010-08-12 2012-02-16 C.T.I.F. -Centre Technique Des Industries De La Fonderie Device for moulding a thin part
FR2963748A1 (en) * 2010-08-12 2012-02-17 C T I F Ct Tech Des Ind De La Fonderie DEVICE FOR MOLDING A THIN PIECE
CN102259179A (en) * 2010-11-25 2011-11-30 比亚迪股份有限公司 Device for controlling temperature of mold and mold having device
CN102259179B (en) * 2010-11-25 2013-01-30 比亚迪股份有限公司 Device for controlling temperature of mold and mold having device
JP2013252533A (en) * 2012-06-06 2013-12-19 Japan Steel Works Ltd:The Die apparatus for metal injection-molding machine

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