JP2005335188A

JP2005335188A - Valve gate type mold assembly and its manufacturing method

Info

Publication number: JP2005335188A
Application number: JP2004156727A
Authority: JP
Inventors: Yoshihiro Horikawa; 義広堀川; Kojiro Masuda; 孝次郎益田
Original assignee: Mitsubishi Materials Corp
Current assignee: Mitsubishi Materials Corp
Priority date: 2004-05-26
Filing date: 2004-05-26
Publication date: 2005-12-08

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve gate type mold assembly capable of smoothing the inner surface of a material passage and capable of smoothly filling a product cavity with a molding material, and its manufacturing method. <P>SOLUTION: A valve device 11 has a valve casing 12 having a spiral material passage 31 formed therein. The valve casing 12 is composed of an insert 41 and an outer peripheral body 51 and the outer peripheral body 51 is divided to form divided outer peripheral bodies. A DC current and/or a pulse current is allowed to flow through the insert 41 and the outer peripheral body 51 to temporarily join both of them, and the insert 41 and the outer peripheral body 51 in the temporarily joined state are heat-treated at a predetermined atmospheric temperature to form the spiral part 35 of the material passage 31 between the insert 41 and the outer peripheral body 51. The inner surface of the material passage 31 can be kept smooth without protruding a welding auxiliary material into the material passage 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、熱可塑性樹脂の射出成形などに用いられるバルブゲート式金型装置とその製造方法に関する。 The present invention relates to a valve gate mold apparatus used for injection molding of a thermoplastic resin and the like, and a manufacturing method thereof.

製品キャビティへのゲートまでの材料通路内の成形材料である樹脂を加熱して常時溶融状態に保つホットランナー金型装置において、ゲートをバルブ体であるバルブピンにより機械的に開閉するバルブゲート式金型装置が知られている。なお、ホットランナー金型装置は、成形能率を高めることを目的としたものであり、ゲートを閉じるのは、型開時などにゲートから樹脂が漏れるのを防止するためである。 In a hot runner mold device that heats the resin that is the molding material in the material passage to the gate to the product cavity and keeps it in a molten state at all times, a valve gate mold that mechanically opens and closes the gate with a valve pin that is a valve body The device is known. The hot runner mold apparatus is intended to increase the molding efficiency, and the gate is closed to prevent the resin from leaking from the gate when the mold is opened.

ここで、従来のバルブゲート式金型装置について説明する。型体である固定型と可動型は互いに移動して開閉し、型閉時に相互間に製品形状の製品キャビティを形成する。固定型は固定側型板と固定側受け板とを備え、固定側型板には前記製品キャビティへ開口するゲートが形成されている。前記固定側受け板及び固定側型板に貫通形成された組込み孔にはバルブ装置のバルブケーシングが組み込まれている。このバルブケーシングはほぼ筒状になっており、その中心に前記ゲートに連通する材料通路が形成されている。前記バルブケーシングの外周面には材料通路内の成形材料である熱可塑性樹脂を常時溶融状態に保つための手段であるコイルヒーターと、このコイルヒーターを外側から覆うヒータカバーとが設けられている。前記バルブケーシングの材料通路にはマニホールドの材料通路であるライナーが接続され、このランナーには射出成形機から成形材料が送られてくる。前記バルブケーシング内には油圧シリンダーなどにより駆動されてガイドブッシュに支持されながら移動することにより前記ゲートブッシュのゲートを開閉するバルブピンが設けられている。このバルブピンはゲートブッシュのゲートに嵌合してこれを閉塞する。そして成形時には、複数の型体を型閉してこれら型体間に製品キャビティを形成するとともにゲートを開き、材料通路からゲートを介して製品キャビティ内に成形材料を充填する。ついで、バルブピンによりゲートブッシュのゲートを閉じ、さらに、製品キャビティ内の成形材料が固化した後、型開して製品キャビティ内の成形材料すなわち成形された製品を取り出す。その後、再び型閉して以上の成形サイクルを繰り返すが、全成形サイクルを通じて、バルブケーシングの材料通路内の成形材料は加熱手段の加熱により常時溶融状態に保たれる（例えば特許文献１）。 Here, a conventional valve gate mold apparatus will be described. The fixed mold and the movable mold, which are mold bodies, move relative to each other to open and close, and when the mold is closed, a product-shaped product cavity is formed between them. The fixed mold includes a fixed-side mold plate and a fixed-side receiving plate, and a gate that opens to the product cavity is formed on the fixed-side mold plate. A valve casing of the valve device is incorporated in an assembly hole formed through the fixed side receiving plate and the fixed side mold plate. The valve casing is substantially cylindrical, and a material passage communicating with the gate is formed at the center thereof. On the outer peripheral surface of the valve casing, there are provided a coil heater which is means for constantly keeping the thermoplastic resin which is a molding material in the material passage in a molten state, and a heater cover which covers the coil heater from the outside. A liner which is a material passage of a manifold is connected to the material passage of the valve casing, and a molding material is sent to the runner from an injection molding machine. A valve pin that opens and closes the gate of the gate bush by moving while being supported by a guide bush driven by a hydraulic cylinder or the like is provided in the valve casing. The valve pin is fitted to the gate of the gate bush to close it. At the time of molding, a plurality of molds are closed to form product cavities between the molds and the gate is opened, and the molding material is filled into the product cavities from the material passage through the gates. Next, the gate of the gate bush is closed by the valve pin, and after the molding material in the product cavity is solidified, the mold is opened and the molding material in the product cavity, that is, the molded product is taken out. Thereafter, the mold is closed again and the above molding cycle is repeated. Throughout the entire molding cycle, the molding material in the material passage of the valve casing is always kept in a molten state by the heating of the heating means (for example, Patent Document 1).

上記マニホールド内には材料通路たるランナーが設けられ、このランナーに前記バルブケーシング内の材料通路が接続され、射出成形機から送られてきた成形材料が、前記ランナー及びバルブケーシング内の材料通路を通ってキャビティ内に充填される。成形材料がランナーからバルブケーシング内に流入する際、成形材料は、バルブケーシング内でバルブピンの一側に当たり、迂回した後に再び合流する。そして、成形材料がバルブピンを一側から押すため、バルブピンを曲げる力が加わり、高速高圧充填では特に影響を受け易く、また、成形材料がバルブピンの一側に当たって迂回することにより、成形材料の流れに偏りが生じ、キャビティへの均一な充填の妨げとなる。また、バルブピンを曲げる力が加わると、ゲートとの嵌合において磨耗が発生し易くなる。 A runner as a material passage is provided in the manifold, and the material passage in the valve casing is connected to the runner, and the molding material sent from the injection molding machine passes through the material passage in the runner and the valve casing. To fill the cavity. When the molding material flows into the valve casing from the runner, the molding material hits one side of the valve pin in the valve casing and rejoins after detouring. And since the molding material pushes the valve pin from one side, the force to bend the valve pin is added, and it is particularly susceptible to high-speed and high-pressure filling, and the molding material hits one side of the valve pin and bypasses it, so that the flow of the molding material Bias occurs and prevents uniform filling of the cavity. Further, when a force for bending the valve pin is applied, wear tends to occur in the fitting with the gate.

このような問題を解消するものとして、互いに開閉し型閉時に製品キャビティを相互間に形成する複数の型体と、これら型体のうち製品キャビティへ開口するゲートを有する型体に設けられたバルブ装置とを備え、このバルブ装置は、前記型体に組み込まれると共に材料通路を内部に形成したバルブケーシングと、前記バルブケーシングの内部に設けられ前記ゲートを開閉するバルブピンとを有するバルブゲート式金型装置において、前記材料通路が螺旋状に形成されており、前記バルブケーシングに、前記バルブ体挿通孔を有する入れ子を形成し、この入れ子を装着する装着孔を、前記バルブケーシングに設け、前記入れ子と前記装着孔との間に前記材料通路を設け、前記入れ子の外周に形成した溝により前記材料通路を形成し、装着孔に挿入した入れ子をロウ付け又は溶剤を用いた拡散接合により固定したバルブゲート式金型装置（例えば特許文献２）が提案されている。
特開２０００−２８０２９７号公報特開２００３−２４５９４８号公報 In order to solve such a problem, a valve provided on a mold body having a plurality of mold bodies that open and close each other and form a product cavity therebetween when the mold is closed, and a gate body that has a gate opening to the product cavity. And a valve gate mold having a valve casing incorporated in the mold body and having a material passage formed therein, and a valve pin provided inside the valve casing for opening and closing the gate. In the apparatus, the material passage is formed in a spiral shape, and a nest having the valve body insertion hole is formed in the valve casing, and a mounting hole for mounting the nest is provided in the valve casing. The material passage is provided between the mounting hole and the material passage is formed by a groove formed on the outer periphery of the insert. Off to nest valve gated mold apparatus fixed by diffusion bonding using brazing or solvent (for example, Patent Document 2) are proposed.
JP 2000-280297 A JP 2003-245948 A

上記特許文献２のバルブゲート式金型装置では、バルブケーシング内の材料通路が螺旋状に形成されているから、螺旋状の材料通路を通過した成形材料に螺旋方向の回転流が発生し、この回転流を伴う成形材料がゲートから充填されるため、成形材料を製品キャビティ内へ高速で円滑に充填することができ、また、成形材料がバルブピン挿通孔の周囲に形成された材料通路を流れるため、成形材料の流れがバルブピンから抵抗を受けない。 In the valve gate type mold apparatus of Patent Document 2, since the material passage in the valve casing is formed in a spiral shape, a rotational flow in the spiral direction is generated in the molding material passing through the spiral material passage. Since the molding material with a rotating flow is filled from the gate, the molding material can be filled smoothly into the product cavity at a high speed, and the molding material flows through the material passage formed around the valve pin insertion hole. The flow of molding material does not receive resistance from the valve pin.

しかし、上記特許文献２のようにロウ材を使ったロウ付けや、溶剤を用いた拡散溶接を用いると、ロウ材や溶剤成分が材料通路の内面に残り、これが樹脂の滞留を招き、樹脂が炭化したコンタミが発生し、特にレンズなどの透明品ではコンタミが混入すると成形不良となる。また、材料通路の内面が粗いと、多色成形などにおいて、色換えに時間を要する。 However, when brazing using a brazing material or diffusion welding using a solvent is used as in Patent Document 2, the brazing material and the solvent component remain on the inner surface of the material passage, which causes the resin to stay, Carbonized contamination is generated, and in particular in transparent products such as lenses, if contamination is mixed, molding will be defective. Also, if the inner surface of the material passage is rough, it takes time to change colors in multicolor molding or the like.

ところで、上述したように、材料通路内の成形材料は加熱手段の加熱により常時溶融状態に保たれ、その加熱手段として、バルブケーシングの外周面にヒータを設け、バルブケーシングの外周から材料通路を加熱するようにしており、成形を良好に行うには、材料通路内の成形材料を均一に加熱する必要がある。しかし、上記のロウ材を使ったロウ付けや、溶剤を用いた拡散溶接は、複雑な形状の部材同士の接合には不向きであり、部材の形状に制約を受け易いため、特許文献２では、樹脂通路を中心に対して略135度の範囲で螺旋状に形成している。したがって、外周にヒータを設けたバルブケーシングの断面の一方側に材料通路が位置するため、材料通路の樹脂を均一に加熱できないという問題がある。 By the way, as described above, the molding material in the material passage is always kept in a molten state by heating by the heating means. As the heating means, a heater is provided on the outer peripheral surface of the valve casing, and the material passage is heated from the outer periphery of the valve casing. In order to perform the molding well, it is necessary to uniformly heat the molding material in the material passage. However, brazing using the above brazing material and diffusion welding using a solvent are not suitable for joining members having complicated shapes, and are subject to restrictions on the shape of the members. The resin passage is formed in a spiral shape within a range of approximately 135 degrees with respect to the center. Therefore, since the material passage is located on one side of the cross section of the valve casing provided with the heater on the outer periphery, there is a problem that the resin in the material passage cannot be heated uniformly.

本発明は、このような問題点を解決しようとするもので、材料通路の内面を平滑にすることができ、成形材料を製品キャビティに円滑に充填することができるバルブゲート式金型装置とその製造方法を提供することを目的とし、また、成形材料を均一に加熱することができるバルブゲート式金型装置とその製造方法を提供することを目的とする。 The present invention is intended to solve such problems, and a valve gate mold apparatus capable of smoothing the inner surface of a material passage and smoothly filling a product cavity with a molding material and its It aims at providing a manufacturing method, and also aims at providing the valve gate type metal mold | die apparatus which can heat a molding material uniformly, and its manufacturing method.

請求項１の発明は、互いに開閉し型閉時に製品キャビティを相互間に形成する複数の型体と、これら型体のうち製品キャビティへ開口するゲートを有する型体に設けられたバルブ装置とを備え、このバルブ装置は、前記型体に組み込まれると共に材料通路を内部に形成したバルブケーシングと、前記バルブケーシングの内部に設けられ前記ゲートを開閉するバルブ体とを有し、前記材料通路が螺旋状に形成されているバルブゲート式金型装置において、接合面同士を当接させた複数のバルブケーシング構成部材に、直流電流及び／又はパルス電流を流して、前記接合面を仮接合し、仮接合された状態の複数のバルブケーシング構成部材を所定の雰囲気温度で熱処理して前記複数のバルブケーシング構成部材間に前記螺旋状の材料通路を形成したものである。 The invention of claim 1 includes a plurality of mold bodies that open and close each other and form a product cavity therebetween when the mold is closed, and a valve device provided in a mold body having a gate that opens to the product cavity among these mold bodies. The valve device includes a valve casing that is incorporated in the mold body and has a material passage formed therein, and a valve body that is provided inside the valve casing and opens and closes the gate, and the material passage is spiral. In the valve gate mold apparatus formed in the shape, a direct current and / or a pulse current are passed through a plurality of valve casing constituent members that are in contact with each other to temporarily join the joint surfaces. The plurality of valve casing components in the joined state are heat-treated at a predetermined atmospheric temperature to form the spiral material passage between the plurality of valve casing components. It is intended.

また、請求項２の発明は、前記複数のバルブケーシング構成部材の一つは、前記バルブ体を挿通するバルブ体挿通孔を有する入れ子であり、他のバルブケーシング構成部材は、前記入れ子を装着する外周体を分割した分割外周体であり、前記入れ子と前記分割外周体との間に前記材料通路を設けたものである。 According to a second aspect of the present invention, one of the plurality of valve casing constituent members is a nest having a valve body insertion hole through which the valve body is inserted, and the other valve casing constituent member is mounted with the nest. The outer peripheral body is a divided outer peripheral body, and the material passage is provided between the insert and the divided outer peripheral body.

また、請求項３の発明は、前記バルブケーシングの外周に加熱手段を設け、前記材料通路が前記入れ子の周囲を１周以上回って設けられているものである。 According to a third aspect of the present invention, a heating means is provided on the outer periphery of the valve casing, and the material passage is provided around the circumference of the insert one or more times.

請求項４の発明は、互いに開閉し型閉時に製品キャビティを相互間に形成する複数の型体と、これら型体のうち製品キャビティへ開口するゲートを有する型体に設けられたバルブ装置とを備え、このバルブ装置は、前記型体に組み込まれると共に材料通路を内部に形成したバルブケーシングと、前記バルブケーシングの内部に設けられ前記ゲートを開閉するバルブ体とを有し、前記材料通路が螺旋状に形成されているバルブゲート式金型装置の製造方法において、複数のバルブケーシング構成部材間に前記材料通路を形成し、前記複数のバルブケーシング構成部材の接合面同士を当接させ、前記複数のバルブケーシング構成部材に、直流電流及び／又はパルス電流を流して、前記複数のバルブケーシング構成部材の接合面を仮接合し、仮接合された状態の複数のバルブケーシング構成部材を所定の雰囲気温度で熱処理する製造方法である。 According to a fourth aspect of the present invention, there are provided a plurality of mold bodies that open and close to each other to form a product cavity therebetween when the mold is closed, and a valve device provided in a mold body having a gate that opens to the product cavity among these mold bodies. The valve device includes a valve casing that is incorporated in the mold body and has a material passage formed therein, and a valve body that is provided inside the valve casing and opens and closes the gate, and the material passage is spiral. In the manufacturing method of the valve gate mold apparatus formed in a shape, the material passage is formed between a plurality of valve casing constituent members, the joint surfaces of the plurality of valve casing constituent members are brought into contact with each other, A direct current and / or pulse current is passed through the valve casing constituent members to temporarily join the joint surfaces of the plurality of valve casing constituent members. A plurality of valve casing components of states is a manufacturing method of a heat treatment at a predetermined ambient temperature.

また、請求項５の発明は、前記複数のバルブケーシング構成部材の一つは、前記バルブ体を挿通するバルブ体挿通孔を有する入れ子であり、他のバルブケーシング構成部材は、前記入れ子を装着する外周体を分割した分割外周体であり、前記入れ子と前記分割外周体との間に前記材料通路を設けた製造方法である。 According to a fifth aspect of the present invention, one of the plurality of valve casing components is a nest having a valve body insertion hole through which the valve body is inserted, and the other valve casing component is mounted with the nest. It is a divided outer peripheral body obtained by dividing an outer peripheral body, and is a manufacturing method in which the material passage is provided between the insert and the divided outer peripheral body.

また、請求項６の発明は、前記材料通路を研磨した後、前記仮接合を行う製造方法である。 The invention of claim 6 is a manufacturing method in which the temporary bonding is performed after the material passage is polished.

また、請求項７の発明は、前記熱処理を不活性雰囲気中で行う製造方法である。 The invention of claim 7 is a manufacturing method in which the heat treatment is performed in an inert atmosphere.

また、請求項８の発明は、前記熱処理の温度を接合すべき部材の融点の５５％〜８５％の温度範囲とする製造方法である。 The invention of claim 8 is a manufacturing method wherein the temperature of the heat treatment is set to a temperature range of 55% to 85% of the melting point of the members to be joined.

請求項１の構成によれば、溶接補助材をまったく使用せずに複数のバルブケーシング構成部材を強固に接合でき、しかも、接合面の全面を均一に接合することができる。このように溶接補助材を使用しないから、材料通路に溶接補助材が出ることがなく、接合後処理が難しい材料通路内面を平滑に保つことができる。 According to the structure of Claim 1, a some valve casing structural member can be joined firmly, without using a welding auxiliary material at all, and also the whole surface of a joining surface can be joined uniformly. Since no welding auxiliary material is used in this way, the welding auxiliary material does not appear in the material passage, and the inner surface of the material passage which is difficult to perform post-joining can be kept smooth.

また、成形時には、複数の型体を型閉してこれら型体間に製品キャビティを形成するとともにゲートを開き、製品キャビティ内に成形材料を充填する。この際、成形材料は、バルブケーシング内の材料通路を通ってゲートから製品キャビティ内に流入する。そして、バルブケーシング内の材料通路が螺旋状に形成されているため、螺旋状の材料通路を通過した成形材料に螺旋方向の回転流が発生し、この回転流を伴う成形材料がゲートから充填されるため、成形材料を製品キャビティ内へ円滑に充填することができる。 At the time of molding, a plurality of molds are closed to form product cavities between the molds, and the gate is opened to fill the product cavities with molding material. At this time, the molding material flows from the gate into the product cavity through the material passage in the valve casing. Since the material passage in the valve casing is formed in a spiral shape, a rotational flow in the spiral direction is generated in the molding material that has passed through the spiral material passage, and the molding material accompanying this rotational flow is filled from the gate. Therefore, the molding material can be smoothly filled into the product cavity.

また、請求項２の構成によれば、成形材料がバルブ体挿通孔の周囲に形成された材料通路を流れるため、成形材料の流れがバルブピンから抵抗を受けない。また、入れ子の外周または装着孔に加工を施し、装着孔に入れ子を装着することにより、螺旋状の材料通路を容易に形成することができる。 According to the second aspect of the present invention, since the molding material flows through the material passage formed around the valve body insertion hole, the flow of the molding material does not receive resistance from the valve pin. Further, by processing the outer periphery or the mounting hole of the insert and mounting the insert in the mounting hole, the spiral material passage can be easily formed.

また、請求項３の構成によれば、材料通路を流れる成形材料を加熱手段により均一に加熱することができる。また、螺旋状の材料通路を通過する間に、成形材料の回転流を確実に発生することができる。 Moreover, according to the structure of Claim 3, the molding material which flows through a material channel | path can be heated uniformly by a heating means. In addition, a rotational flow of the molding material can be reliably generated while passing through the spiral material passage.

また、請求項４の構成によれば、溶接補助材をまったく使用せずに複数のバルブケーシング構成部材を強固に接合でき、しかも、接合面の全面を均一に接合することができる。そして、溶接補助材を使用しないから、バルブケーシングの材料通路に溶接補助材が出ることがなく、接合後処理が難しい材料通路内面を平滑に保つことができる。 Moreover, according to the structure of Claim 4, a some valve casing structural member can be joined firmly, without using a welding auxiliary material at all, and the whole joining surface can be joined uniformly. And since a welding auxiliary material is not used, a welding auxiliary material does not come out to the material channel | path of a valve casing, and the material channel | path inner surface where a post-joining process is difficult can be kept smooth.

また、請求項５の構成によれば、成形材料の流れがバルブピンから抵抗を受けない。また、入れ子の外周または装着孔に加工を施し、装着孔に入れ子を装着することにより、螺旋状の材料通路を容易に形成することができる。 Moreover, according to the structure of Claim 5, the flow of a molding material does not receive resistance from a valve pin. Further, by processing the outer periphery or the mounting hole of the insert and mounting the insert in the mounting hole, the spiral material passage can be easily formed.

また、請求項６の構成によれば、研磨後に仮接合を行っても、溶接補助材を用いないため、材料通路内面を平滑に保つことができる。 Moreover, according to the structure of Claim 6, even if it performs temporary joining after grinding | polishing, since a welding auxiliary material is not used, a material channel | path inner surface can be kept smooth.

また、請求項７の構成によれば、熱処理を不活性雰囲気中で行うことにより接合箇所の品質が安定する。 Moreover, according to the structure of Claim 7, the quality of a joining location is stabilized by performing heat processing in inert atmosphere.

また、請求項８の構成によれば、前記熱処理の温度を接合すべき部材の融点の５５％〜８５％の温度範囲とすることが熱処理上から好ましい。 Moreover, according to the structure of Claim 8, it is preferable on heat processing that the temperature of the said heat processing shall be 55 to 85% of melting | fusing point of the member which should be joined.

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。なお、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる新規なバルブゲート式金型装置とその製造方法を採用することにより、従来にないバルブゲート式金型装置とその製造方法が得られ、そのバルブゲート式金型装置とその製造方法について記述する。 Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new valve gate type mold apparatus different from the conventional one and its manufacturing method, an unprecedented valve gate type mold apparatus and its manufacturing method can be obtained. Describes the device and its manufacturing method.

以下、本発明の成形用金型装置の実施例について図１〜図１０は本発明の実施例１を示し、同図において、１は固定型、２は可動型で、型体であるこれら固定型１および可動型２は、図１における図示上下方向（型開閉方向）に互いに移動して開閉し、型閉時に相互間に製品形状の製品キャビティ３を形成するものである。固定型１は、その本体部としての金属製の固定側型板４と、この固定側型板４の裏側にスペーサーブロックを介して固定された固定側取り付け板（図示していない）とを備えており、この固定側取り付け板と固定側型板４との間にはマニホールド６が設けられている。このマニホールド６は、材料通路であるランナー７が内部に形成されており、このランナー７内の成形材料である熱可塑性樹脂は、マニホールド６に設けられた図示していないヒーターの加熱により常時溶融状態に保たれるようになっている。なお、前記固定側型板４は、固定側受け板あるいはゲートブッシュなどを加えて複数の部材により構成したものであってもよい。また、前記固定側型板４には組み込み孔５が貫通形成されており、この組み込み孔５における可動型２側の先端部は、前記製品キャビティ３に連通するゲート８になっており、このゲート８はダイレクトゲートである。 1 to 10 show an embodiment 1 of the present invention. In the figure, 1 is a fixed mold, 2 is a movable mold, and these fixed bodies are mold bodies. The mold 1 and the movable mold 2 are opened and closed by moving in the vertical direction (mold opening / closing direction) shown in FIG. 1 to form a product-shaped product cavity 3 between them when the mold is closed. The fixed mold 1 includes a metal fixed-side mold plate 4 as a main body, and a fixed-side mounting plate (not shown) fixed to the back side of the fixed-side mold plate 4 via a spacer block. A manifold 6 is provided between the fixed side mounting plate and the fixed side mold plate 4. The manifold 6 has a runner 7 that is a material passage formed therein, and the thermoplastic resin that is a molding material in the runner 7 is always melted by heating of a heater (not shown) provided in the manifold 6. To be kept. The fixed-side template 4 may be constituted by a plurality of members by adding a fixed-side receiving plate or a gate bush. Further, an assembly hole 5 is formed through the fixed side mold plate 4, and the tip of the assembly hole 5 on the movable mold 2 side is a gate 8 communicating with the product cavity 3. 8 is a direct gate.

また、固定型１には、前記ゲート８を開閉するバルブ装置11が組み込まれている。つぎに、このバルブ装置11の構成を説明する。前記固定側型板４の組み込み孔５内に、前記型開閉方向を軸方向とするほぼ筒状のバルブケーシング12が組み込まれている。このバルブケーシング12は、金属製であって、径小部たる本体部13の反ゲート８側に、径大部たるフランジ部14を一体に有し、前記マニホールド６および固定側型板４間に固定されて支持されている。そして、それら本体部13及びフランジ部14の外周面は円柱面状をなす。また、バルブケーシング12のゲート８側である先端部15はテーパ状の先細り形状をなす。 Further, the fixed mold 1 incorporates a valve device 11 for opening and closing the gate 8. Next, the configuration of the valve device 11 will be described. A substantially cylindrical valve casing 12 whose axial direction is the mold opening / closing direction is incorporated in the assembly hole 5 of the fixed-side mold plate 4. The valve casing 12 is made of metal, and integrally has a flange portion 14 having a large diameter portion on the side opposite to the gate 8 of the main body portion 13 having a small diameter portion, and is interposed between the manifold 6 and the fixed side mold plate 4. Fixed and supported. The outer peripheral surfaces of the main body portion 13 and the flange portion 14 have a cylindrical surface shape. Moreover, the front-end | tip part 15 which is the gate 8 side of the valve casing 12 makes a taper taper shape.

また、前記バルブケーシング12におけるゲート８側の端部の外周面には固定リング16が設けられ、この固定リング16が前記組み込み孔５の円柱状の嵌合孔５Ａに嵌合することによりバルブケーシング12のゲート８側が型体である固定側型板４に位置決め状態で支持固定され、一方、前記バルブケーシング12のフランジ部14の先端側が、前記組み込み孔５におけるマニホールド６側の端部に形成された径大嵌合受部５Ｂに嵌合し、これにより、バルブケーシング12のフランジ部14のゲート８側が型体である固定側型板４に位置決め状態で支持固定されている。 A fixing ring 16 is provided on the outer peripheral surface of the end of the valve casing 12 on the gate 8 side, and the fixing ring 16 is fitted into the cylindrical fitting hole 5A of the built-in hole 5 to thereby provide the valve casing. The gate 8 side of 12 is supported and fixed in a positioning state on the stationary side mold plate 4 which is a mold body, while the front end side of the flange portion 14 of the valve casing 12 is formed at the end of the assembly hole 5 on the manifold 6 side. Thus, the gate 8 side of the flange portion 14 of the valve casing 12 is supported and fixed in a positioning state on the fixed side mold plate 4 which is a mold body.

バルブケーシング12の中心には、前記型開閉方向のバルブ体挿通孔21が貫通形成され、このバルブ体挿通孔21に、バルブ体たるほぼ円柱状のバルブピン22が摺動可能に支持され、このバルブピン22は図示していない油圧シリンダー装置などの駆動装置の駆動により前記型開閉方向に移動して前記ゲート８を開閉する。このバルブピン22は先端部にストレート部として形成されたゲート閉塞部23がゲート８に挿脱自在に嵌合してこのゲート８を閉じるものである。また、バルブピン22は前記型開閉方向を軸方向としている。 A valve body insertion hole 21 in the mold opening / closing direction is formed through the center of the valve casing 12, and a substantially cylindrical valve pin 22 as a valve body is slidably supported in the valve body insertion hole 21. The gate 22 is opened and closed by moving in the mold opening and closing direction by driving of a driving device such as a hydraulic cylinder device (not shown). The valve pin 22 is configured such that a gate closing portion 23 formed as a straight portion at the tip portion is detachably fitted to the gate 8 to close the gate 8. The valve pin 22 has the mold opening / closing direction as an axial direction.

前記バルブケーシング12内には、前記バルブピン22と離れた位置であってバルブ体挿通孔21に周囲に螺旋状の材料通路31が形成されており、この材料通路31は前記フランジ部14の反ゲート側面32に入口部33を有し、この入口部33に前記ランナー７が接続される。前記入口部33からバルブケーシング12の中央ゲート側に向って材料通路31の入口斜設部34が直線状に形成され、この入口斜設部34の先端からゲート側に向って前記挿通孔21を中心に７６０度螺旋状に回転する材料通路31の螺旋部35が形成され、この螺旋部35のゲート側と前記バルブ体挿通孔21のゲート側開口端部21Ａとを材料通路31の出口斜設部36により連結している。前記入口斜設部34及び出口斜設部36はバルブ体挿通孔21に対して斜設されていると共に、該挿通孔21を含む同一平面上に位置する。 A spiral material passage 31 is formed in the valve casing 12 at a position away from the valve pin 22 and around the valve body insertion hole 21, and the material passage 31 is an anti-gate of the flange portion 14. The side surface 32 has an inlet 33, and the runner 7 is connected to the inlet 33. An inlet oblique portion 34 of the material passage 31 is formed in a straight line from the inlet portion 33 toward the central gate side of the valve casing 12, and the insertion hole 21 extends from the tip of the inlet oblique portion 34 toward the gate side. A spiral portion 35 of the material passage 31 rotating in a spiral shape at 760 degrees is formed at the center, and the gate side of the spiral portion 35 and the gate side opening end portion 21A of the valve body insertion hole 21 are provided obliquely at the outlet of the material passage 31. The parts 36 are connected. The inlet oblique portion 34 and the outlet oblique portion 36 are obliquely provided with respect to the valve body insertion hole 21 and are located on the same plane including the insertion hole 21.

前記バルブケーシング12の中央は入れ子41に形成され、この入れ子41を装着する入れ子装着孔42が前記バルブケーシング12に形成され、この入れ子装着孔42は前記フランジ部14の反ゲート側面32に開口し、ゲート側は前記螺旋部35のゲート側近傍まで形成されている。また、入れ子41の中央と前記バルブケーシング12の先端部15側とを連続して前記バルブ体挿通孔21が形成されている。図６などに示すように、入れ子41は円柱状の外周面43を有する。尚、前記入れ子41は複数のバルブケーシング構成部材の１つである。また、バルブケーシング12において、装着孔42の周囲は、ほぼ円筒形状をなす。 The center of the valve casing 12 is formed in a nesting 41, and a nesting mounting hole 42 for mounting the nesting 41 is formed in the valve casing 12, and the nesting mounting hole 42 opens on the side opposite to the gate 32 of the flange portion 14. The gate side is formed up to the vicinity of the spiral side 35 on the gate side. Further, the valve body insertion hole 21 is formed continuously from the center of the insert 41 and the distal end portion 15 side of the valve casing 12. As shown in FIG. 6 and the like, the insert 41 has a cylindrical outer peripheral surface 43. The insert 41 is one of a plurality of valve casing components. Further, in the valve casing 12, the periphery of the mounting hole 42 has a substantially cylindrical shape.

また、バルブシング12の入れ子41を除いた部分の外周体51は、軸方向を中心に２分割された同一形状の分割外周体52，52からなり、これら分割外周体52，52の接合面53，53を接合して外周体51が形成される。尚、分割外周体52，52は同一形状であるが、前記螺旋部35を形成する後述する溝の配置は異なる。 Further, the outer peripheral body 51 of the valve sing 12 excluding the insert 41 is composed of divided outer peripheral bodies 52 and 52 having the same shape divided into two around the axial direction, and a joint surface 53 of these divided outer peripheral bodies 52 and 52. , 53 are joined together to form the outer peripheral body 51. Although the divided outer peripheral bodies 52 and 52 have the same shape, the arrangement of grooves to be described later forming the spiral portion 35 is different.

前記入口斜設部34及び出口斜設部36は、前記接合面53，53に溝を形成することにより、前記分割外周体52，52の間に設けられている。前記螺旋部35は前記入れ子41と分割外周体52，52との間に設けられており、前記入れ子41の外周面43に、前記螺旋部35を形成する溝435を形成し、前記分割外周体52，52の内周面54，54に、前記螺旋部35を形成する溝535を形成し、両溝435，535が合わされて螺旋部35が形成される。前記接合面53，53の溝及び溝435，535は円弧状溝に形成されており、材料通路31の断面はほぼ円形となる。尚、分割外周体52，52の内周面54，54は前記装着孔42の内面である。また、前記外周面43と内周面54は、入れ子41と分割外周体52の接合面である。 The entrance oblique portion 34 and the exit oblique portion 36 are provided between the divided outer peripheral bodies 52 and 52 by forming grooves in the joint surfaces 53 and 53. The spiral portion 35 is provided between the insert 41 and the divided outer peripheral bodies 52, 52. A groove 435 for forming the spiral portion 35 is formed on the outer peripheral surface 43 of the insert 41, and the divided outer peripheral body is formed. A groove 535 for forming the spiral portion 35 is formed on the inner peripheral surfaces 54, 54 of the 52, 52, and both the grooves 435, 535 are combined to form the spiral portion 35. The grooves of the joint surfaces 53 and 53 and the grooves 435 and 535 are formed as arc-shaped grooves, and the material passage 31 has a substantially circular cross section. The inner peripheral surfaces 54, 54 of the divided outer peripheral bodies 52, 52 are the inner surfaces of the mounting hole 42. The outer peripheral surface 43 and the inner peripheral surface 54 are joint surfaces of the insert 41 and the divided outer peripheral body 52.

次に、前記バルブゲート式金型装置の製造方法につき、バルブケーシング12の製法を中心に説明すると、バルブケーシング構成部材である入れ子41及び分割外周体52，52を形成する。そして、接合面たる外周面43と内周面54，54及び接合面53，53を平坦面に加工し、好ましくは鏡面に加工する。接合面たる外周面43と内周面54，54及び接合面53，53は、粗面（表面荒さがＪＩＳ規格で▽印程度）でもよいが、鏡面に加工する方が部材の接合強度が高くかつ、接合による変形を小さくすることができるので好ましく、接合面における鏡面についての数値的範囲は必ずしも明確でないが、ここではＲａ０．３以下の数値の平滑度（数値が小さいなれば平滑度は高くなる）を有する表面加工状態を言う。また、接合前に、材料通路31を構成する接合面53，53の溝及び溝435，535を研磨し、好ましくは樹脂通路31の内面の表面粗さを２Ｓ（２μｍＲmax）とする。 Next, the manufacturing method of the valve gate mold apparatus will be described focusing on the manufacturing method of the valve casing 12. The insert 41 and the divided outer peripheral bodies 52, 52 which are valve casing constituent members are formed. Then, the outer peripheral surface 43, the inner peripheral surfaces 54 and 54, and the joint surfaces 53 and 53 as the joint surfaces are processed into flat surfaces, preferably mirror surfaces. The outer peripheral surface 43, the inner peripheral surfaces 54 and 54, and the joint surfaces 53 and 53, which are the joint surfaces, may be rough surfaces (surface roughness is about ▽ in JIS standard), but the joint strength of the member is higher when processed into a mirror surface In addition, it is preferable because deformation due to joining can be reduced, and the numerical range of the mirror surface on the joining surface is not necessarily clear, but here the smoothness of numerical values of Ra 0.3 or less (the smaller the numerical value, the higher the smoothness) The surface processed state having Further, before joining, the grooves of the joining surfaces 53 and 53 and the grooves 435 and 535 constituting the material passage 31 are polished, and the surface roughness of the inner surface of the resin passage 31 is preferably 2S (2 μm Rmax).

このように、接合前に材料通路31となる接合面53，53の溝及び溝435，535を研磨するため、螺旋部35などの内面を容易に研磨することができる。 As described above, since the grooves of the bonding surfaces 53 and 53 and the grooves 435 and 535 that become the material passage 31 are polished before bonding, the inner surface of the spiral portion 35 and the like can be easily polished.

研磨が終了した後、まず、分割外周体52，52を一体化して外周体51を形成する。接合面53，53同士を合わせ、公知の位置決め手段等を用いて分割外周体52，52を上下に重ね合わせ、この分割外周体52，52を上下に重ね合わせた積層体51Ｓを、通電接合装置に装着して、接合面53，53を接合する。 After the polishing is completed, first, the outer peripheral body 51 is formed by integrating the divided outer peripheral bodies 52 and 52. The joining surfaces 53 and 53 are aligned with each other, and the divided outer peripheral bodies 52 and 52 are vertically overlapped using a known positioning means or the like. And the joining surfaces 53 and 53 are joined.

図９には本例の通電接合装置の全体構成を示してある。この図に示すように、本例の通電接合装置Ｔは、通電接合機70と熱処理機80を備えている。通電接合機70は、基台72の上に絶縁部材を介して公知の方法で基台72と電気的に絶縁して固定された下側通電電極73と、基台72の上方に配置され当該基台72に公知の方法で支持された流体圧シリンダ74と、流体圧シリンダ74のピストンロッド75の先端に絶縁部材を介して公知の方法でピストンロッド75と電気的に絶縁して固定された上側通電電極76とを備えている。 FIG. 9 shows the overall configuration of the energization joining apparatus of this example. As shown in the figure, the energization joining apparatus T of this example includes an energization joining machine 70 and a heat treatment machine 80. The energization bonding machine 70 is disposed above the base 72 and a lower energizing electrode 73 that is electrically insulated from the base 72 and fixed on the base 72 by a known method via an insulating member. A fluid pressure cylinder 74 supported on the base 72 by a known method, and fixed to the tip of the piston rod 75 of the fluid pressure cylinder 74 by an insulation member and electrically insulated from the piston rod 75 by a known method. And an upper energizing electrode 76.

流体圧シリンダ74は被接合材を押圧する加圧装置として機能する。加圧装置としては流体圧シリンダの代わりに電動モータ、ねじ機構などを用いて上側通電電極76を昇降させるようにしてもよい。上側および下側の通電電極73，76は、電源装置77に電気的に接続されており、電源装置77は、直流のパルス電流を供給できるようになっている。本例の電源装置77の供給電力は、電圧が１００Ｖ以下で、電流が２０００から５０００Ａの範囲内の大電流電力である。なお、本例では上側通電電極76を移動可能としてあるが、逆に下側通電電極73を移動可能とすることもでき、また、双方を移動可能にすることも可能である。 The fluid pressure cylinder 74 functions as a pressurizing device that presses the material to be joined. As the pressurizing device, the upper energizing electrode 76 may be moved up and down using an electric motor, a screw mechanism or the like instead of the fluid pressure cylinder. The upper and lower energization electrodes 73 and 76 are electrically connected to a power supply device 77, and the power supply device 77 can supply a DC pulse current. The power supply of the power supply device 77 of this example is a large current power having a voltage of 100 V or less and a current in the range of 2000 to 5000A. In this example, the upper energizing electrode 76 can be moved, but conversely, the lower energizing electrode 73 can be moved, or both can be moved.

次に、熱処理機80は公知の構造の真空熱処理炉を備えた構成となっている。なお、通電接合機70と熱処理機80を一体化した装置構成とすることもでき、また、これらを移動可能な構造とすることもできる。勿論、これらを別個に配置してもよい。 Next, the heat treatment machine 80 includes a vacuum heat treatment furnace having a known structure. It should be noted that the current bonding machine 70 and the heat treatment machine 80 can be integrated into a device configuration, or these can be moved. Of course, these may be arranged separately.

次に、この構造の通電接合装置Ｔを用いて、積層体51Ｓを構成している分割外周体52，52を相互に接合する手順を説明する。 Next, a procedure for joining the divided outer peripheral bodies 52 and 52 constituting the laminated body 51S to each other using the energization joining apparatus T having this structure will be described.

まず、通電電極73，76の間に積層体51Ｓを挟み、流体圧シリンダ74を駆動して、ピストンロッド75により上側通電電極76を降下させる。この結果、積層体51Ｓは、通電電極73，76の間に挟まれて、所定の押圧力で押し付けられた状態になる。分割外周体52，52の接合面53，53との間に所定の押圧力が作用した状態になる。この押圧力は部材の材質によっても異なるが５０メガパスカル以下でよい。 First, the laminate 51S is sandwiched between the energizing electrodes 73 and 76, the fluid pressure cylinder 74 is driven, and the upper energizing electrode 76 is lowered by the piston rod 75. As a result, the laminated body 51S is sandwiched between the energizing electrodes 73 and 76 and is pressed with a predetermined pressing force. A predetermined pressing force is applied between the joint surfaces 53 and 53 of the divided outer circumferential bodies 52 and 52. Although this pressing force varies depending on the material of the member, it may be 50 megapascals or less.

この結果、各接合面53，53の間が互いに接合された状態になる。この接合の正確な原理は必ずしも明確ではないが、接合面間での放電プラズマの発生、ジュール熱による熱拡散効果、電場による電解拡散効果などにより接合されるものと考えられる。 As a result, the joint surfaces 53 and 53 are joined to each other. Although the exact principle of this joining is not necessarily clear, it is thought that joining is performed by the generation of discharge plasma between joining surfaces, the thermal diffusion effect by Joule heat, the electrolytic diffusion effect by an electric field, and the like.

ここで、積層体51Ｓに所定の値の直流電流のみを流しても、また、直流電流およびパルス電流の双方を同時に流しても、接合面53，53間が互いに接合された状態を形成できることが確認された。 Here, even when only a direct current of a predetermined value is allowed to flow through the laminated body 51S, or when both a direct current and a pulse current are simultaneously applied, it is possible to form a state where the joint surfaces 53 and 53 are joined together. confirmed.

このようにして各接合面53，53が接合された状態は、接合強度の点からはまだ完全なものではない。そこで、この接合状態を仮接合状態と呼び、仮接合状態にある積層体51Ｓを仮接合体と呼ぶ。 The state in which the joint surfaces 53 and 53 are joined in this way is not yet complete from the viewpoint of joining strength. Therefore, this bonded state is referred to as a temporary bonded state, and the laminate 51S in the temporary bonded state is referred to as a temporary bonded body.

次に、図１０に示すように、仮接合状態にある積層体51Ｓの装着孔42に入れ子41を挿入し、積層体51Ｓを下、入れ子41を上にした積層体12Ｓを、同図に示すように、通電接合装置に装着して、接合面である内周面54と外周面43を接合する。この接合は、図９と同じ装置を用いて行われ、上側の通電電極76を入れ子41に接続し、下側の通電電極73を積層体51Ｓに電気的に接続して行われ、入れ子41と積層体51Ｓとを上下加圧通電する際に、通電された入れ子41と積層体51Ｓが加熱される。加熱された入れ子41と積層体51Ｓは、熱膨張するので、円柱状をなす積層体51Ｓの内周面54と入れ子41の内周面43のクリアランスを調整することにより、これらの間の接合面に所定の押圧力が作用した状態を形成できる。このため、入れ子41と積層体51Ｓにおいて、上下の加圧方向とは異なる方向の入れ子41の外周面43と積層体51Ｓの内周面54を接合することができる。このクリアランスは一般に鉄系の場合、２〜５０μｍが良い。尚、加圧通電の際、別個の加圧手段により積層体51Ｓの分割外周体52，52の仮接合された接合面53，53との間に所定の押圧力を加えるようにしてもよい。このようにして、入れ子41と分割外周体52，52を接合した状態を仮接合状態と呼び、仮接合状態にある積層体12Ｓを仮接合体と呼ぶ。 Next, as shown in FIG. 10, a stack 12S is shown in which the insert 41 is inserted into the mounting hole 42 of the stack 51S in the temporarily bonded state, the stack 51S is down, and the insert 41 is up. As described above, the inner peripheral surface 54 and the outer peripheral surface 43 which are the joint surfaces are joined to each other by being attached to the energization joining device. This joining is performed using the same apparatus as in FIG. 9, and the upper energizing electrode 76 is connected to the insert 41 and the lower energizing electrode 73 is electrically connected to the stacked body 51S. When energizing the laminated body 51S with up and down pressure, the energized nest 41 and the laminated body 51S are heated. Since the heated insert 41 and the laminate 51S are thermally expanded, the clearance between the inner peripheral surface 54 of the cylindrical laminate 51S and the inner peripheral surface 43 of the insert 41 can be adjusted by adjusting the clearance between them. Thus, a state in which a predetermined pressing force is applied can be formed. For this reason, in the insert 41 and the laminate 51S, the outer peripheral surface 43 of the insert 41 and the inner peripheral surface 54 of the laminate 51S in a direction different from the upper and lower pressurizing directions can be joined. This clearance is generally 2 to 50 μm in the case of iron. It should be noted that a predetermined pressing force may be applied between the split outer peripheral bodies 52, 52 of the laminated body 51S and the temporarily joined joint surfaces 53, 53 by a separate pressurizing means during the energization with pressure. In this way, the state where the insert 41 and the divided outer peripheral bodies 52, 52 are joined is referred to as a temporary joined state, and the laminated body 12S in the temporarily joined state is referred to as a temporarily joined body.

前記積層体12Ｓの仮接合体を、熱処理機80の熱処理炉内において不活性雰囲気中で熱処理する。熱処理温度および時間は部材の材質および大きさによって異なるが、熱処理温度は、接合すべき部材の最も低い融点の５５％〜８５％の温度範囲とすることが望ましい。相互拡散熱処理を行うことにより、仮接合状態の接合面53，53間及び外周面43と内周面54間の接合が完全なものになって完全接合体になる。すなわち、接合面53，53間及び外周面43と内周面54間の接合強度が部材の材質強度に匹敵する値になったバルブケーシング12が得られる。 The temporary joined body of the laminate 12S is heat-treated in an inert atmosphere in a heat treatment furnace of a heat treatment machine 80. The heat treatment temperature and time vary depending on the material and size of the member, but the heat treatment temperature is desirably in the temperature range of 55% to 85% of the lowest melting point of the members to be joined. By performing the interdiffusion heat treatment, the bonding between the bonding surfaces 53 and 53 in the temporarily bonded state and between the outer peripheral surface 43 and the inner peripheral surface 54 becomes perfect, and a complete bonded body is obtained. That is, the valve casing 12 in which the joint strength between the joint surfaces 53 and 53 and between the outer peripheral surface 43 and the inner peripheral surface 54 is equal to the material strength of the member is obtained.

本発明で用いる接合方法及び装置で使用する電流は、直流電流、パルス電流、及び直流電流とパルス電流との組み合わせ電流であるが、このうちパルス電流及び直流電流とパルス電流の組み合わせ電流を使用する場合にはパルス電流が必ず流されるのでパルス通電接合方法及び装置と呼ぶこともできる。 The current used in the bonding method and apparatus used in the present invention is a direct current, a pulse current, and a combination current of a direct current and a pulse current. Among these, a pulse current and a combination current of a direct current and a pulse current are used. In some cases, a pulse current always flows, so it can be called a pulse energization joining method and apparatus.

また、この接合方法では、次の様な効果を奏する。従来の放電プラズマ焼結法のようにグラファイト製の型を用いる必要がない。溶接補助材を全く使用せずに接合が可能である。接合面の全面を、かつ全面に渡って均一に接合できる。接合面を平面にするだけで容易に接合できる。接合面の平面精度を上げることによって接合強度を高くできる。接合強度を接合される金属部材の材質の強度と同一にできる。接合部の変形を微小にして接合できる。接合部周辺における溶接補助材、蝋の削除のような後加工が不要である。微細部分の接合も簡単に行うことができる。被接合部品を部品として完成してから接合できるので複雑な形状のものを接合により組立可能である。被接合部材の性質を損なうことなく接合することが可能である。異なる材質の金属部材を容易に接合可能である。接合部以外の部分温度を適正に制御して接合可能である。異なる形状の複数の部品を同時に接合可能である。 Moreover, this joining method has the following effects. There is no need to use a graphite mold unlike the conventional spark plasma sintering method. Joining is possible without using any welding aids. The entire joining surface can be joined uniformly over the entire surface. It can be easily joined only by making the joining surface flat. The joint strength can be increased by increasing the planar accuracy of the joint surface. The joint strength can be made the same as the strength of the material of the metal member to be joined. Bonding can be performed with a small deformation of the bonding portion. There is no need for post-processing such as removal of welding aids and wax around the joint. It is possible to easily join the fine portions. Since the parts to be joined can be joined after being completed as parts, those having complicated shapes can be assembled by joining. It is possible to join without impairing the properties of the members to be joined. Metal members of different materials can be easily joined. Bonding is possible by appropriately controlling the temperature of the portion other than the bonding portion. A plurality of parts having different shapes can be joined simultaneously.

上述した熱処理を経て、図１に示すバルブケーシング12が得られる。このバルブケーシング12は、分割外周体52，52と入れ子41を接合することにより、接合面53，53の間に材料通路31の斜設部34，36が形成され、装着孔42と外周面43との間に材料通路31の螺旋部35が形成されている。従って、螺旋部35を備えた材料通路31を簡単に製造できる。すなわち、分割外周体の接合面たる内周面54と入れ子41の接合面たる外周面43に、研削などにより材料通路31を構成する溝を形成すればよいので、それを螺旋状に形成することも、また、その内面に鏡面仕上げを施すことも容易である。しかも、溶接補助材をまったく使用せずに接合できるから、接合後、材料通路31に溶接補助材が出ることがなく、材料通路31の内面を平滑に保つことができる。 Through the heat treatment described above, the valve casing 12 shown in FIG. 1 is obtained. In this valve casing 12, the divided outer peripheral bodies 52, 52 and the insert 41 are joined to form the oblique portions 34, 36 of the material passage 31 between the joint faces 53, 53, and the mounting hole 42 and the outer peripheral face 43. The spiral portion 35 of the material passage 31 is formed between the two. Therefore, the material passage 31 including the spiral portion 35 can be easily manufactured. That is, since the groove constituting the material passage 31 may be formed by grinding or the like on the inner peripheral surface 54 which is the joint surface of the divided outer peripheral body and the outer peripheral surface 43 which is the joint surface of the insert 41, it is formed in a spiral shape. It is also easy to give a mirror finish to the inner surface. In addition, since joining can be performed without using any welding auxiliary material, the welding auxiliary material does not appear in the material passage 31 after joining, and the inner surface of the material passage 31 can be kept smooth.

また、本例の方法によれば、分割外周体52，52と入れ子41の接合強度も、その母材強度程度の強さにできるので、分割外周体52，52と入れ子41とからバルブケーシング12を構成しても、何ら不具合が発生しない。 Further, according to the method of the present example, the joint strength between the divided outer peripheral bodies 52 and 52 and the insert 41 can be made as strong as the strength of the base material. Even if configured, no problems occur.

さらに、材料通路31の内面の鏡面加工も、分割外周体52，52と入れ子41を接合する前に行えばよいので、極めて簡単にできる。 Further, the mirror finishing of the inner surface of the material passage 31 can be performed very simply because it is performed before the divided outer peripheral bodies 52, 52 and the insert 41 are joined.

そして、成形に際しては、まず固定型１と可動型２とを型閉して、これら固定型１および可動型２間に製品キャビティ３を形成した後、バルブピン22を可動型２から離れる方向へ移動させてゲート８を開放する。そして、射出成形機から固定型１内に熱可塑性の成形材料である溶融した熱可塑性樹脂を射出する。この樹脂は、マニホールド６のランナー７などを通り、さらにバルブケーシング12内の材料通路31を通ってゲート８から製品キャビティ３内に流入する。このようにして製品キャビティ３内に樹脂が充填された後、保圧を経て、バルブピン22が可動型２の方へ移動し、ゲート８に嵌合してこのゲート８を閉じる。そして、製品キャビティ３内の樹脂が冷却して固化した後、固定型１と可動型２とを型開して、製品キャビティ３内の樹脂すなわち成形された製品を取り出す。その後、再び型閉して以上の成形サイクルを繰り返す。 When molding, first, the fixed mold 1 and the movable mold 2 are closed, a product cavity 3 is formed between the fixed mold 1 and the movable mold 2, and then the valve pin 22 is moved away from the movable mold 2. The gate 8 is opened. Then, a molten thermoplastic resin, which is a thermoplastic molding material, is injected into the fixed mold 1 from the injection molding machine. The resin flows through the runner 7 of the manifold 6 and the like, and further flows into the product cavity 3 from the gate 8 through the material passage 31 in the valve casing 12. After the resin is filled in the product cavity 3 in this way, after holding pressure, the valve pin 22 moves toward the movable mold 2 and is fitted to the gate 8 to close the gate 8. Then, after the resin in the product cavity 3 is cooled and solidified, the fixed mold 1 and the movable mold 2 are opened, and the resin in the product cavity 3, that is, the molded product is taken out. Thereafter, the mold is closed again and the above molding cycle is repeated.

このように本実施例では、請求項１に対応して、互いに開閉し型閉時に製品キャビティ３を相互間に形成する複数の型体たる固定型１及び可動型２と、これら固定型１及び可動型２のうち製品キャビティ３へ開口するゲート８を有する型体たる固定型１に設けられたバルブ装置11とを備え、このバルブ装置11は、固定型１に組み込まれると共に材料通路31を内部に形成したバルブケーシング12と、バルブケーシング12の内部に設けられゲート８を開閉するバルブ体たるバルブピン22とを有し、材料通路31が螺旋状に形成されているバルブゲート式金型装置において、接合面53，53同士及び接合面たる外周面43と内周面54同士を当接させた複数のバルブケーシング構成部材たる入れ子41及び分割外周体52，52に、直流電流及び／又はパルス電流を流して、前記外周面43と内周面54及び接合面53，53を仮接合し、仮接合された状態の入れ子41及び分割外周体52，52を所定の雰囲気温度で熱処理して入れ子41及び分割外周体52，52間に材料通路31の螺旋部35を形成したから、溶接補助材をまったく使用せずに入れ子41及び分割外周体52，52を強固に接合でき、しかも、接合面53，53及び外周面43と内周面54の全面を均一に接合することができる。このように溶接補助材を使用しないから、材料通路31に溶接補助材が出ることがなく、接合後処理が難しい材料通路31内面を平滑に保つことができる。 Thus, in the present embodiment, corresponding to claim 1, a plurality of fixed molds 1 and movable molds 2 that are opened and closed with each other and form a product cavity 3 between the molds when the mold is closed, And a valve device 11 provided in a fixed mold 1 as a mold body having a gate 8 that opens to the product cavity 3 of the movable mold 2. The valve device 11 is incorporated in the fixed mold 1 and has a material passage 31 therein. In the valve gate type mold apparatus having a valve casing 12 formed in the valve casing 12 and a valve pin 22 as a valve body provided inside the valve casing 12 for opening and closing the gate 8 and having a material passage 31 formed in a spiral shape. A direct current and / or pulse current is applied to the insert 41 and the divided outer peripheral bodies 52, 52 as the plurality of valve casing constituent members in which the joint surfaces 53, 53 and the outer peripheral surface 43 and the inner peripheral surface 54 are in contact with each other. Flush The outer peripheral surface 43, the inner peripheral surface 54, and the joining surfaces 53, 53 are temporarily joined, and the nest 41 and the divided outer peripheral bodies 52, 52 in the temporarily joined state are heat-treated at a predetermined atmospheric temperature, and the nest 41 and the divided outer peripheral body Since the spiral portion 35 of the material passage 31 is formed between 52 and 52, the insert 41 and the divided outer peripheral bodies 52 and 52 can be firmly joined without using any welding auxiliary material, and the joint surfaces 53 and 53 and the outer circumference can be joined. The entire surface 43 and the inner peripheral surface 54 can be joined uniformly. Since no welding auxiliary material is used in this way, no welding auxiliary material appears in the material passage 31, and the inner surface of the material passage 31, which is difficult to perform post-joining processing, can be kept smooth.

また、成形時には、固定型１と可動型２を型閉してこれら固定型１と可動型２間に製品キャビティ３を形成するとともにゲート８を開き、製品キャビティ３内に成形材料を充填する。この際、成形材料は、バルブケーシング12内の材料通路31を通ってゲート８から製品キャビティ３内に流入する。そして、バルブケーシング12内の材料通路31が螺旋状に形成されているため、螺旋状の材料通路31たる螺旋部35を通過した成形材料に螺旋方向の回転流が発生し、この回転流を伴う成形材料がゲート８から充填されるため、成形材料を製品キャビティ３内へ円滑に充填することができる。 At the time of molding, the fixed mold 1 and the movable mold 2 are closed to form a product cavity 3 between the fixed mold 1 and the movable mold 2 and the gate 8 is opened, and the product cavity 3 is filled with a molding material. At this time, the molding material flows from the gate 8 into the product cavity 3 through the material passage 31 in the valve casing 12. Further, since the material passage 31 in the valve casing 12 is formed in a spiral shape, a rotational flow in the spiral direction is generated in the molding material that has passed through the spiral portion 35 that is the spiral material passage 31, and this rotational flow is accompanied. Since the molding material is filled from the gate 8, the molding material can be smoothly filled into the product cavity 3.

また、このように本実施例では、請求項２に対応して、複数のバルブケーシング構成部材の一つは、バルブ体たるバルブピン22を挿通するバルブ体挿通孔21を有する入れ子41であり、他のバルブケーシング構成部材は、入れ子41を装着する外周体51を分割した分割外周体52，52であり、入れ子41と分割外周体52，52との間に材料通路31の螺旋部35を設けたから、成形材料がバルブ体挿通孔21の周囲に形成された材料通路31を流れるため、成形材料の流れがバルブピン22から抵抗を受けない。また、入れ子41の外周または装着孔42に加工を施し、装着孔42に入れ子41を装着することにより、螺旋状の材料通路31の螺旋部35を容易に形成することができる。 In this way, in this embodiment, corresponding to claim 2, one of the plurality of valve casing constituent members is the insert 41 having the valve body insertion hole 21 through which the valve pin 22 as the valve body is inserted. The valve casing constituent members are divided outer peripheral bodies 52 and 52 obtained by dividing the outer peripheral body 51 on which the insert 41 is mounted, and the spiral portion 35 of the material passage 31 is provided between the insert 41 and the divided outer peripheral bodies 52 and 52. Since the molding material flows through the material passage 31 formed around the valve body insertion hole 21, the flow of the molding material does not receive resistance from the valve pin 22. Further, by processing the outer periphery of the insert 41 or the mounting hole 42 and mounting the insert 41 in the mounting hole 42, the spiral portion 35 of the spiral material passage 31 can be easily formed.

また、このように本実施例では、請求項３に対応して、バルブケーシング12の外周に加熱手段たるヒータ９を設け、材料通路31が入れ子41の周囲を１周以上回って設けられているから、材料通路31を流れる成形材料をヒータ９により均一に加熱することができ、また、材料通路31の螺旋部35を通過する間に、成形材料の回転流を確実に発生することができる。さらに、この例では、螺旋部35がほぼ２周に回って螺旋状に設けられているから、より成形材料を均一に加熱できる。 Thus, in this embodiment, corresponding to claim 3, the heater 9 as the heating means is provided on the outer periphery of the valve casing 12, and the material passage 31 is provided around the nest 41 by one or more rounds. Therefore, the molding material flowing through the material passage 31 can be uniformly heated by the heater 9, and the rotational flow of the molding material can be reliably generated while passing through the spiral portion 35 of the material passage 31. Furthermore, in this example, since the spiral portion 35 is provided in a spiral shape around almost two turns, the molding material can be heated more uniformly.

このように本実施例では、請求項４に対応して、互いに開閉し型閉時に製品キャビティ３を相互間に形成する複数の型体たる固定型１及び可動型２と、これら固定型１及び可動型２のうち製品キャビティ３へ開口するゲート８を有する型体たる固定型１に設けられたバルブ装置11とを備え、このバルブ装置11は、固定型１に組み込まれると共に材料通路31を内部に形成したバルブケーシング12と、バルブケーシング12の内部に設けられゲート８を開閉するバルブ体たるバルブピン22とを有し、材料通路31が螺旋状に形成されているバルブゲート式金型装置の製造方法において、複数のバルブケーシング構成部材たる入れ子41及び分割外周体52，52間に材料通路31を形成し、入れ子41及び分割外周体52，52の接合面53，53同士及び接合面たる外周面43と内周面54同士を当接させ、入れ子41及び分割外周体52，52に、直流電流及び／又はパルス電流を流して、入れ子41及び分割外周体52，52の接合面53，53及び外周面43と内周面54を仮接合し、仮接合された状態の入れ子41及び分割外周体52，52を所定の雰囲気温度で熱処理するから、溶接補助材をまったく使用せずに入れ子41及び分割外周体52，52を強固に接合でき、しかも、接合面53，53及び外周面43と内周面54の全面を均一に接合することができる。そして、溶接補助材を使用しないから、バルブケーシング12の材料通路31に溶接補助材が出ることがなく、接合後処理が難しい材料通路31の内面を平滑に保つことができる。 Thus, in this embodiment, corresponding to claim 4, the fixed mold 1 and the movable mold 2 as a plurality of mold bodies that open and close each other and form the product cavity 3 when the mold is closed, and the fixed mold 1 and And a valve device 11 provided in a fixed mold 1 as a mold body having a gate 8 that opens to the product cavity 3 of the movable mold 2. The valve device 11 is incorporated in the fixed mold 1 and has a material passage 31 therein. The valve gate 12 is formed in the valve casing 12, and the valve pin 22 is provided inside the valve casing 12 as a valve body for opening and closing the gate 8 and the material passage 31 is formed in a spiral shape. In the method, a material passage 31 is formed between a plurality of inserts 41 and divided outer peripheral bodies 52 and 52 which are constituent members of a valve casing, and the joint surfaces 53 and 53 of the insert 41 and the divided outer peripheral bodies 52 and 52 and an outer peripheral surface which is a joint surface 43 and inner circumference The surfaces 54 are brought into contact with each other, a direct current and / or a pulse current is passed through the insert 41 and the divided outer peripheral bodies 52 and 52, and the joining surfaces 53 and 53 and the outer peripheral face 43 of the insert 41 and the divided outer peripheral bodies 52 and 52 The inner peripheral surface 54 is temporarily joined, and the nest 41 and the divided outer peripheral bodies 52 and 52 in the temporarily joined state are heat-treated at a predetermined atmospheric temperature, so the insert 41 and the divided outer peripheral body 52 are not used at all. , 52 can be firmly bonded, and the entire surfaces of the bonding surfaces 53, 53 and the outer peripheral surface 43 and the inner peripheral surface 54 can be bonded uniformly. Since no welding auxiliary material is used, the welding auxiliary material does not appear in the material passage 31 of the valve casing 12, and the inner surface of the material passage 31 that is difficult to perform post-joining can be kept smooth.

また、このように本実施例では、請求項５に対応して、複数のバルブケーシング構成部材の一つは、バルブ体たるバルブピン22を挿通するバルブ体挿通孔21を有する入れ子41であり、他のバルブケーシング構成部材は、入れ子41を装着する外周体51を分割した分割外周体52，52であり、入れ子41と分割外周体52，52との間に材料通路31の螺旋部35を設けたから、成形材料がバルブ体挿通孔21の周囲に形成された材料通路31を流れるため、成形材料の流れがバルブピン22から抵抗を受けない。また、入れ子41の外周または装着孔42に加工を施し、装着孔42に入れ子41を装着することにより、螺旋状の材料通路31の螺旋部35を容易に形成することができる。 In this way, in this embodiment, corresponding to claim 5, one of the plurality of valve casing constituent members is the insert 41 having the valve body insertion hole 21 through which the valve pin 22 as the valve body is inserted. The valve casing constituent members are divided outer peripheral bodies 52 and 52 obtained by dividing the outer peripheral body 51 on which the insert 41 is mounted, and the spiral portion 35 of the material passage 31 is provided between the insert 41 and the divided outer peripheral bodies 52 and 52. Since the molding material flows through the material passage 31 formed around the valve body insertion hole 21, the flow of the molding material does not receive resistance from the valve pin 22. Further, by processing the outer periphery of the insert 41 or the mounting hole 42 and mounting the insert 41 in the mounting hole 42, the spiral portion 35 of the spiral material passage 31 can be easily formed.

また、このように本実施例では、請求項６に対応して、材料通路31を研磨した後、仮接合を行うから、、研磨後に仮接合を行っても、溶接補助材を用いないため、材料通路31の内面を平滑に保つことができる。 Further, in this example, in accordance with claim 6, since the material passage 31 is ground and then temporarily joined, even if temporarily joined after grinding, the welding auxiliary material is not used. The inner surface of the material passage 31 can be kept smooth.

また、このように本実施例では、請求項７に対応して、前記熱処理を不活性雰囲気中で行うから、接合箇所の品質が安定する。 In this way, in this embodiment, the heat treatment is performed in an inert atmosphere corresponding to claim 7, so that the quality of the joint portion is stabilized.

また、このように本実施例では、請求項８に対応して、前記熱処理の温度を接合すべき部材の融点の５５％〜８５％の温度範囲とするから、熱処理上から好ましく、良好な接合状態が得られる。 In this way, in this embodiment, in correspondence with claim 8, the temperature of the heat treatment is set to a temperature range of 55% to 85% of the melting point of the members to be joined. A state is obtained.

また、実施例上の効果として、螺旋部35をバルブケーシング12の軸芯に対して、ほぼ４５度に形成し、このように螺旋部35をバルブケーシング12の軸芯に対して、４０〜５０度の角度で設けることにより、成形材料をスムーズに送ることができると共に、材料通路31を通過する間に成形材料を均一に加熱することができる。 Further, as an effect of the embodiment, the spiral portion 35 is formed at approximately 45 degrees with respect to the axis of the valve casing 12, and thus the spiral portion 35 is 40 to 50 with respect to the axis of the valve casing 12. By providing the angle of the degree, the molding material can be smoothly fed and the molding material can be heated uniformly while passing through the material passage 31.

図１１及び図１２は本発明の実施例２を示し、上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例では、図１１に示すように、入れ子41を、その軸方向を中心に２分割した同一形状の分割入れ子44，44を形成し、その分割面が分割入れ子44，44同士の接合面45，45となっている。これら接合面45，45は、平坦面に加工され、好ましくは鏡面に加工されている。尚、前記分割入れ子44はバルブケーシング構成部材である。 11 and 12 show a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and detailed description thereof will be omitted. In this example, as shown in FIG. In addition, split nestings 44 and 44 having the same shape are formed by dividing the nesting 41 into two parts around the axial direction, and the divided surfaces serve as joint surfaces 45 and 45 between the split nestings 44 and 44. These joint surfaces 45, 45 are processed into flat surfaces, preferably mirror surfaces. The split insert 44 is a valve casing component.

そして、通電接合装置Ｔを用いて、分割外周体52の接合面たる内周面54と、分割入れ子44の接合面たる外周面43とを所定の圧力で押し付け、この押し付けた状態を保持しながら、分割外周体52と分割入れ子44に、直流電流及び／又はパルス電流を流して、複数のバルブケーシング構成部材である分割外周体52と分割入れ子44の接合面たる内周面54と外周面43を仮接合し、これにより図１２に示すようにバルブケーシング12の２分の１の形状をなすバルブケーシング分割積層体61Ｓの仮接合体が形成され、２つの前記バルブケーシング分割積層体61Ｓ，61Ｓの接合面45，45，53，53を所定の圧力で押し付け、この押し付けた状態を保持しながら、バルブケーシング分割積層体61Ｓ，61Ｓに、直流電流及び／又はパルス電流を流して、バルブケーシング分割積層体61Ｓ，61Ｓを仮接合してバルブケーシング12の仮接合体を形成し、その後、実施例１と同様にして、その仮接合体を所定の雰囲気温度で熱処理して入れ子41及び分割外周体52，52間に材料通路31の螺旋部35を形成するから、上記実施例１と同様な作用・効果を奏する。 Then, using the energization joining device T, the inner peripheral surface 54 as the joint surface of the split outer peripheral body 52 and the outer peripheral surface 43 as the joint surface of the split insert 44 are pressed with a predetermined pressure, and the pressed state is maintained. Then, a DC current and / or a pulse current is passed through the divided outer peripheral body 52 and the divided nest 44 so that the inner peripheral surface 54 and the outer peripheral surface 43, which are joint surfaces of the divided outer peripheral body 52 and the divided nest 44, which are a plurality of valve casing constituent members. As a result, a temporary joined body of the valve casing split laminated body 61S having a half shape of the valve casing 12 is formed as shown in FIG. 12, and the two valve casing split laminated bodies 61S, 61S are formed. The joint surfaces 45, 45, 53, and 53 are pressed at a predetermined pressure, and while maintaining this pressed state, a direct current and / or a pulse current is passed through the valve casing divided laminates 61 S and 61 S to split the valve casing. Laminated The bodies 61S and 61S are temporarily joined to form a temporarily joined body of the valve casing 12, and thereafter, the temporary joined body is heat-treated at a predetermined ambient temperature in the same manner as in the first embodiment, and the nesting 41 and the divided outer peripheral body 52 are formed. , 52, the spiral portion 35 of the material passage 31 is formed. Thus, the same operations and effects as in the first embodiment are obtained.

尚、本発明は、前記実施形態に限定されるものではなく、種々の変形実施が可能である。例えば、実施例では、バルブケーシング構成部材たる分割外周体が２個の例を示したが、３個以上でもよい。 In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible. For example, in the embodiment, an example in which there are two divided outer peripheral bodies as valve casing constituent members is shown, but three or more may be used.

本発明の実施例１を示すバルブゲート式金型装置の断面図である。It is sectional drawing of the valve gate type metal mold | die apparatus which shows Example 1 of this invention. 同上、バルブケーシングの断面図である。It is sectional drawing of a valve casing same as the above. 同上、バルブケーシングの平面図である。It is a top view of a valve casing same as the above. 同上、外周体の斜視図である。It is a perspective view of an outer periphery body same as the above. 同上、分割外周体の斜視図である。It is a perspective view of a division | segmentation outer periphery body same as the above. 同上、入れ子の正面図であるIt is a front view of the nesting 同上、入れ子の側面図である。It is a side view of a nesting same as the above. 同上、入れ子の斜視図である。It is a perspective view of a nesting same as the above. 同上、通電接合装置の概略構成図であり、外周体となる仮接合体の製造方法を説明するものである。It is a schematic block diagram of an electricity joining apparatus same as the above, and demonstrates the manufacturing method of the temporary joining body used as an outer peripheral body. 同上、通電接合装置の概略構成図であり、バルブケーシングとなる仮接合体の製造方法を説明するものである。It is a schematic block diagram of an electricity supply joining apparatus same as the above, and demonstrates the manufacturing method of the temporary joining body used as a valve casing. 本発明の実施例２を示す分割入れ子の平面図である。It is a top view of the division | segmentation nest | insert which shows Example 2 of this invention. 同上、バルブケーシング分割体積層体の平面図である。It is a top view of a valve casing division body laminated body same as the above.

Explanation of symbols

１固定型（型体）
２可動型（型体）
３製品キャビティ
８ゲート
９ヒータ（加熱手段）
11 バルブ装置
12 バルブケーシング
21 バルブ体挿通孔
22 バルブピン（バルブ体）
31 材料通路
35 螺旋部
41 入れ子（バルブケーシング構成部材）
43 外周面（接合面）
51 外周体（バルブケーシング構成部材）
52 分割外周体（バルブケーシング構成部材）
53 接合面
54 内周面（接合面）
44 分割入れ子（バルブケーシング構成部材）
45 接合面

1 Fixed type
2 Movable type (form)
3 Product cavity 8 Gate 9 Heater (heating means)
11 Valve device
12 Valve casing
21 Valve body insertion hole
22 Valve pin (Valve body)
31 Material passage
35 Spiral
41 Nesting (Valve casing component)
43 Outer peripheral surface (joint surface)
51 Outer body (valve casing component)
52 Split outer periphery (valve casing component)
53 Joint surface
54 Inner peripheral surface (joint surface)
44 Split nesting (valve casing component)
45 Joint surface

Claims

A plurality of mold bodies that open and close each other and form a product cavity between them when the mold is closed, and a valve device provided in a mold body having a gate that opens to the product cavity among these mold bodies, A valve casing which is incorporated in the mold body and has a material passage formed therein, and a valve body which is provided inside the valve casing and opens and closes the gate, wherein the material passage is formed in a spiral shape. In the gate mold apparatus, a direct current and / or a pulse current are passed through a plurality of valve casing constituent members that are brought into contact with each other to temporarily join the joined surfaces, and a plurality of temporarily joined states The helical material passage is formed between the plurality of valve casing constituent members by heat-treating the valve casing constituent members at a predetermined atmospheric temperature. Rubugeto type mold apparatus.

One of the plurality of valve casing constituent members is a nest having a valve body insertion hole through which the valve body is inserted, and the other valve casing constituent member is a divided outer peripheral body obtained by dividing the outer peripheral body to which the insert is attached. The valve gate mold apparatus according to claim 1, wherein the material passage is provided between the insert and the divided outer peripheral body.

The valve gate mold apparatus according to claim 1 or 2, wherein a heating means is provided on an outer periphery of the valve casing, and the material passage is provided around the periphery of the insert one or more times.

A plurality of mold bodies that open and close each other and form a product cavity between them when the mold is closed, and a valve device provided in a mold body having a gate that opens to the product cavity among these mold bodies, A valve casing which is incorporated in the mold body and has a material passage formed therein, and a valve body which is provided inside the valve casing and opens and closes the gate, wherein the material passage is formed in a spiral shape. In the method for manufacturing a gate-type mold apparatus, the material passage is formed between a plurality of valve casing constituent members, the joint surfaces of the plurality of valve casing constituent members are brought into contact with each other, A direct current and / or pulse current is passed to temporarily join the joint surfaces of the plurality of valve casing components, and a plurality of temporarily joined states Method of manufacturing a valve gate type mold apparatus characterized by heat treating the lube casing components at a predetermined ambient temperature.

One of the plurality of valve casing constituent members is a nest having a valve body insertion hole through which the valve body is inserted, and the other valve casing constituent member is a divided outer peripheral body obtained by dividing the outer peripheral body to which the insert is attached. 5. The method of manufacturing a valve gate mold apparatus according to claim 4, wherein the material passage is provided between the insert and the divided outer peripheral body.

6. The method for manufacturing a valve gate mold apparatus according to claim 4, wherein the temporary bonding is performed after the material passage is polished.

The method for manufacturing a valve gate mold apparatus according to any one of claims 4 to 6, wherein the heat treatment is performed in an inert atmosphere.

The method for manufacturing a valve gate mold apparatus according to any one of claims 4 to 7, wherein a temperature of the heat treatment is set to a temperature range of 55% to 85% of a melting point of members to be joined.