JP7092976B2 - Manufacturing method for two-color molded products - Google Patents

Manufacturing method for two-color molded products Download PDF

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JP7092976B2
JP7092976B2 JP2018184173A JP2018184173A JP7092976B2 JP 7092976 B2 JP7092976 B2 JP 7092976B2 JP 2018184173 A JP2018184173 A JP 2018184173A JP 2018184173 A JP2018184173 A JP 2018184173A JP 7092976 B2 JP7092976 B2 JP 7092976B2
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丈晴 深井
諭司 ▲高▼木
崇 松永
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Toyoda Gosei Co Ltd
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Description

本発明は、一次樹脂材料からなる一次樹脂部と、二次樹脂材料からなる二次樹脂部とを一体的に成形してなる二色成形品を製造する方法に関する。 The present invention relates to a method for producing a two-color molded product obtained by integrally molding a primary resin portion made of a primary resin material and a secondary resin portion made of a secondary resin material.

互いに異なる種類の樹脂材料からなる一次樹脂部及び二次樹脂部を一体的に成形してなる二色成形品は、一般的には、例えば特許文献１に記載されているように、固定型、可動型及び移動コアを有する１種類の二色成形金型が用いられて成形される。 A two-color molded product obtained by integrally molding a primary resin portion and a secondary resin portion made of different types of resin materials is generally a fixed type, for example, as described in Patent Document 1. Molded using one type of two-color molding die with a movable mold and a moving core.

すなわち、二色成形金型が型閉じされることで、固定型、可動型及び移動コアの間に一次キャビティが形成される。この一次キャビティに一次樹脂材料が充填されることで一次樹脂部が成形される。 That is, the two-color molding die is closed to form a primary cavity between the fixed die, the movable die and the moving core. The primary resin portion is formed by filling the primary cavity with the primary resin material.

次に、移動コアが移動（後退）されることで、固定型、可動型、移動コア及び一次樹脂部の間に二次キャビティが形成される。表現を変えると、移動コアの移動（後退）に伴い空いたスペースが二次キャビティとなる。二次樹脂材料が二次キャビティに充填されることで、一次樹脂部に接触した状態の二次樹脂部が成形される。このようにして、一次樹脂部及び二次樹脂部からなる二色成形品が得られる。 Next, by moving (retracting) the moving core, a secondary cavity is formed between the fixed type, the movable type, the moving core, and the primary resin portion. In other words, the space vacated by the movement (backward) of the moving core becomes the secondary cavity. By filling the secondary cavity with the secondary resin material, the secondary resin portion in contact with the primary resin portion is molded. In this way, a two-color molded product composed of a primary resin portion and a secondary resin portion can be obtained.

上記製造方法は、一次樹脂部が、移動コアの移動方向にアンダーカット形状を有している二色成形品には適用できない。アンダーカット形状をなす部分が移動コアの移動を妨げるからである。 The above manufacturing method cannot be applied to a two-color molded product in which the primary resin portion has an undercut shape in the moving direction of the moving core. This is because the undercut-shaped portion hinders the movement of the moving core.

そのため、例えば、特許文献２に記載されているように、移動コアを用いないで上記二色成形品を成形する製造方法が採られる。
この製造方法では、共通金型及び一次金型を備える一次成形金型と、上記共通金型及び二次金型を備える二次成形金型とが用いられる。そして、一次成形工程及び二次成形工程が順に行われることで二色成形品が成形される。 Therefore, for example, as described in Patent Document 2, a manufacturing method for molding the above-mentioned two-color molded product without using a moving core is adopted.
In this manufacturing method, a primary molding die including a common mold and a primary mold and a secondary molding die including the common mold and the secondary mold are used. Then, the two-color molded product is molded by performing the primary molding step and the secondary molding step in order.

一次成形工程では、一次成形金型が型閉じされることで、共通金型及び一次金型の間に一次キャビティが形成される。一次樹脂材料が一次キャビティに充填されることにより、一次樹脂部が成形される。 In the primary molding step, the primary molding die is closed to form a primary cavity between the common die and the primary die. The primary resin portion is molded by filling the primary cavity with the primary resin material.

二次成形工程では、一次成形金型及び二次成形金型がともに型開きされ、一次樹脂部の保持された共通金型が、一次金型に対向する位置から二次金型に対向する位置へ移動される。二次成形金型が型閉じされることで、共通金型、一次樹脂部及び二次金型の間に二次キャビティが形成される。二次樹脂材料が二次キャビティに充填されることにより、一次樹脂部に接触した状態の二次樹脂部が成形される。 In the secondary molding process, both the primary molding die and the secondary molding die are opened, and the common mold held by the primary resin portion is positioned from the position facing the primary mold to the position facing the secondary mold. Moved to. By closing the secondary mold, a secondary cavity is formed between the common mold, the primary resin portion, and the secondary mold. By filling the secondary cavity with the secondary resin material, the secondary resin portion in contact with the primary resin portion is molded.

特許第３０３３４１０号明細書Japanese Patent No. 3033410 特開２０１５－２０５４９５号公報Japanese Unexamined Patent Publication No. 2015-205495

ところが、上記後者の二色成形品の製造方法では、二次成形工程において、一次成形金型及び二次成形金型が型開きされて、一次樹脂部の保持された共通金型が一次金型から離間されることで、一次樹脂部が一次金型から取り外される。一次樹脂部の保持された共通金型が、一次金型に対向する位置から二次金型に対向する位置へ移動された後に、二次成形金型の型閉じに際し、一次樹脂部の保持された共通金型が二次金型に接近されることで、一次樹脂部が二次金型に配置（セット）されて二次キャビティが形成される。 However, in the latter method for manufacturing a two-color molded product, the primary molding die and the secondary molding die are opened in the secondary molding step, and the common mold holding the primary resin portion is the primary mold. The primary resin portion is removed from the primary mold by being separated from the primary resin portion. After the common mold in which the primary resin portion is held is moved from the position facing the primary mold to the position facing the secondary mold, the primary resin portion is held when the secondary molding mold is closed. When the common mold is brought close to the secondary mold, the primary resin portion is arranged (set) in the secondary mold to form a secondary cavity.

一次樹脂部が一次金型から取り外されてから二次金型に配置されるまでの期間に、その一次樹脂部が収縮したり、変形したりするおそれがある。また、一次樹脂部が二次金型に配置される際に位置ずれが生ずるおそれもある。そして、このように収縮、変形等した一次樹脂部が二次金型に配置されたり、位置ずれが発生したりすると、二次金型と一次樹脂部との間であって、二次キャビティの外側に隣接する箇所に隙間が発生しやすくなる。隙間が発生した状態で、二次樹脂材料が二次キャビティに充填されると、その二次樹脂材料の一部が上記隙間に入り込む。この隙間に入り込んだ二次樹脂材料が硬化することで、バリが発生するおそれがある。 During the period from when the primary resin portion is removed from the primary mold until it is placed in the secondary mold, the primary resin portion may be shrunk or deformed. In addition, there is a possibility that misalignment may occur when the primary resin portion is arranged in the secondary mold. When the primary resin portion that has been shrunk or deformed in this way is arranged in the secondary mold or misalignment occurs, the secondary cavity is located between the secondary mold and the primary resin portion. Gap is likely to occur in the area adjacent to the outside. When the secondary resin material is filled in the secondary cavity with the gap generated, a part of the secondary resin material enters the gap. There is a possibility that burrs may occur due to the curing of the secondary resin material that has entered this gap.

本発明は、このような実情に鑑みてなされたものであって、その目的は、二次樹脂部の成形時におけるバリの発生を抑制することのできる二色成形品の製造方法を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for manufacturing a two-color molded product capable of suppressing the generation of burrs during molding of a secondary resin portion. It is in.

上記課題を解決する二色成形品の製造方法は、共通金型及び一次金型を備える一次成形金型と、前記共通金型及び二次金型を備える二次成形金型とを用いて、一次樹脂材料からなる一次樹脂部と、二次樹脂材料からなる二次樹脂部とを一体的に成形してなる二色成形品を製造する方法であって、前記一次成形金型の型閉じに際し、前記一次金型及び前記共通金型の間に形成される一次キャビティに前記一次樹脂材料を充填して前記一次樹脂部を成形する一次成形工程と、前記一次成形金型及び前記二次成形金型をともに型開きし、前記一次樹脂部が保持された状態の前記共通金型を、前記一次金型に対向する位置から前記二次金型に対向する位置へ移動させた後、前記一次成形金型及び前記二次成形金型を型閉じすることで、前記共通金型、前記一次樹脂部及び前記二次金型の間に二次キャビティを形成し、前記二次樹脂材料を二次ゲートから前記二次キャビティに充填して、前記一次樹脂部に接触した状態の前記二次樹脂部を成形する二次成形工程とを備え、前記二次成形工程では、前記二次金型として、型閉じ方向に延びる突条部を有するものを用い、前記二次成形金型の型閉じの際には、前記突条部を前記一次樹脂部のうち、前記二次キャビティの周囲となる箇所に食い込ませながら、前記共通金型を前記二次金型に接近させる。 As a method for manufacturing a two-color molded product that solves the above problems, a primary molding die provided with a common mold and a primary mold and a secondary molding die provided with the common mold and the secondary mold are used. It is a method of manufacturing a two-color molded product in which a primary resin portion made of a primary resin material and a secondary resin portion made of a secondary resin material are integrally molded, and when the primary molding die is closed. , The primary molding step of filling the primary resin material in the primary cavity formed between the primary mold and the common mold to form the primary resin portion, and the primary molding mold and the secondary molding mold. The molds are opened together, and the common mold in a state where the primary resin portion is held is moved from a position facing the primary mold to a position facing the secondary mold, and then the primary molding is performed. By closing the mold and the secondary molding mold, a secondary cavity is formed between the common mold, the primary resin portion, and the secondary mold, and the secondary resin material is used as a secondary gate. The secondary molding step is provided with a secondary molding step of filling the secondary cavity into the secondary cavity and molding the secondary resin portion in contact with the primary resin portion. In the secondary molding step, the mold is used as the secondary mold. When the secondary molding die is closed by using a die having a ridge extending in the closing direction, the ridge is bitten into a portion of the primary resin portion that is around the secondary cavity. While doing so, the common mold is brought closer to the secondary mold.

上記の製造方法によれば、一次成形工程では、一次成形金型の型閉じに際し、一次金型及び共通金型の間に形成される一次キャビティに一次樹脂材料が充填されて一次樹脂部が成形される。 According to the above manufacturing method, in the primary molding step, when the primary molding die is closed, the primary resin material is filled in the primary cavity formed between the primary mold and the common mold, and the primary resin portion is molded. Will be done.

二次成形工程では、一次成形金型及び二次成形金型がともに型開きされることで、一次樹脂部の保持された共通金型が一次金型から離間されて、一次樹脂部が一次金型から取り外される。 In the secondary molding process, both the primary molding die and the secondary molding die are opened, so that the common mold held by the primary resin portion is separated from the primary mold, and the primary resin portion is the primary mold. Removed from the mold.

一次樹脂部が保持された状態の共通金型が、一次金型に対向する位置から二次金型に対向する位置へ移動させられる。その後に、一次成形金型及び二次成形金型が型閉じされることで、一次樹脂部が二次金型に配置（セット）される。また、共通金型、一次樹脂部及び二次金型の間に二次キャビティが形成される。二次樹脂材料が二次ゲートから二次キャビティに充填されて、一次樹脂部に接触した状態の二次樹脂部が成形される。 The common mold in which the primary resin portion is held is moved from the position facing the primary mold to the position facing the secondary mold. After that, the primary molding die and the secondary molding die are closed, so that the primary resin portion is arranged (set) in the secondary mold. Further, a secondary cavity is formed between the common mold, the primary resin portion and the secondary mold. The secondary resin material is filled into the secondary cavity from the secondary gate, and the secondary resin portion in contact with the primary resin portion is formed.

ここで、一次樹脂部が一次金型から取り外されてから二次金型に配置されるまでの期間に、一次樹脂部が収縮したり、変形したりするおそれがある。一次樹脂部が二次金型に配置される際に位置ずれが生ずるおそれもある。そして、このように収縮、変形等した一次樹脂部が二次金型に配置されたり、位置ずれが発生したりすると、二次金型と一次樹脂部との間であって二次キャビティの外側に隣接する箇所に隙間が発生しやすくなる。この状態で、二次樹脂材料が二次ゲートから二次キャビティに充填されると、その二次樹脂材料の一部が上記隙間に入り込もうとする。 Here, there is a possibility that the primary resin portion may shrink or be deformed during the period from when the primary resin portion is removed from the primary mold until it is placed in the secondary mold. There is a possibility that misalignment may occur when the primary resin portion is placed in the secondary mold. When the primary resin portion that has been shrunk or deformed in this way is arranged in the secondary mold or misalignment occurs, it is between the secondary mold and the primary resin portion and is outside the secondary cavity. Gap is likely to occur in the area adjacent to. In this state, when the secondary resin material is filled into the secondary cavity from the secondary gate, a part of the secondary resin material tends to enter the gap.

しかし、上記二次成形工程では、二次金型として、型閉じ方向に延びる突条部を有するものが用いられる。そして、二次成形金型の型閉じに際し、突条部を一次樹脂部のうち、二次キャビティの周囲となる箇所に食い込ませながら（一次樹脂部を変形させながら）、共通金型が二次金型に接近させられる。突条部が一次樹脂部に食い込んだ箇所は、隙間のない状態となり、二次樹脂材料が二次キャビティの外部へ流出（漏出）するのを妨げる。従って、二次樹脂材料が上記隙間に入り込んで硬化してバリが発生する現象が起こりにくくなる。 However, in the above secondary molding step, a secondary mold having a ridge portion extending in the mold closing direction is used. Then, when closing the mold of the secondary molding die, the common mold is used while the ridge portion is made to bite into the portion of the primary resin portion around the secondary cavity (while deforming the primary resin portion). It is brought close to the mold. The portion where the ridge portion bites into the primary resin portion is in a state where there is no gap, and prevents the secondary resin material from flowing out (leaking) to the outside of the secondary cavity. Therefore, the phenomenon that the secondary resin material enters the gap and is hardened to generate burrs is less likely to occur.

上記二色成形品の製造方法において、前記一次成形工程では、前記二次樹脂材料よりも硬質の前記一次樹脂材料が用いられて前記一次樹脂部が成形されることが好ましい。
上記の製造方法によれば、一次成形工程では、一次金型及び共通金型の間の一次キャビティに対し、二次樹脂材料よりも硬質の一次樹脂材料が充填されて、二次樹脂部よりも硬質の一次樹脂部が成形される。 In the method for producing a two-color molded product, it is preferable that the primary resin portion is molded by using the primary resin material that is harder than the secondary resin material in the primary molding step.
According to the above manufacturing method, in the primary molding step, the primary cavity between the primary mold and the common mold is filled with a primary resin material that is harder than the secondary resin material, and is more than the secondary resin portion. A hard primary resin portion is molded.

二次成形工程では、共通金型、一次樹脂部及び二次金型の間に形成される二次キャビティに対し、一次樹脂材料よりも軟質の二次樹脂材料が充填されて、一次樹脂部に接触し、かつ一次樹脂部よりも軟質の二次樹脂部が成形される。 In the secondary molding process, the secondary cavity formed between the common mold, the primary resin portion, and the secondary mold is filled with a secondary resin material that is softer than the primary resin material, and the primary resin portion is filled. A secondary resin portion that comes into contact and is softer than the primary resin portion is formed.

上記二次成形工程で、二次成形金型が型閉じされる際には、二次金型における硬質の突条部が、二次樹脂部よりも硬質の一次樹脂部に食い込みながら（一次樹脂部を変形させながら）、共通金型が二次金型に接近させられる。突条部が一次樹脂部に食い込んだ箇所は、隙間のない状態となり、二次樹脂材料が二次キャビティの外部へ流出（漏出）するのを妨げる。硬質の一次樹脂部は、二次樹脂材料の高い圧力が作用しても変形しにくい。一次樹脂部と突条部との間は隙間のない状態に保持され、二次樹脂材料が流出（漏出）しにくくなる。 When the secondary molding die is closed in the above secondary molding step, the hard ridge portion in the secondary mold bites into the primary resin portion which is harder than the secondary resin portion (primary resin). The common mold is brought closer to the secondary mold (while deforming the part). The portion where the ridge portion bites into the primary resin portion is in a state where there is no gap, and prevents the secondary resin material from flowing out (leaking) to the outside of the secondary cavity. The hard primary resin portion is not easily deformed even when the high pressure of the secondary resin material is applied. The space between the primary resin portion and the ridge portion is maintained in a state where there is no gap, and the secondary resin material is less likely to flow out (leak).

上記二色成形品の製造方法において、前記二次成形工程では、前記二次金型として、前記突条部が、前記二次ゲートを挟んで相対向する箇所に設けられたものが用いられることが好ましい。 In the method for manufacturing a two-color molded product, in the secondary molding step, as the secondary mold, a ridge portion provided at a position facing each other across the secondary gate is used. Is preferable.

ここで、二次成形工程において、溶融状態の二次樹脂材料が二次キャビティに充填される際、同二次キャビティでの二次樹脂材料の圧力は、二次樹脂材料が二次キャビティへ流れ込む入口である二次ゲートにおいて最も高くなる。 Here, in the secondary molding step, when the secondary resin material in a molten state is filled in the secondary cavity, the pressure of the secondary resin material in the secondary cavity causes the secondary resin material to flow into the secondary cavity. It is the highest at the secondary gate, which is the entrance.

この点、上記の製造方法によれば、二次成形工程において二次成形金型が型閉じされる際には、二次ゲートを挟んで相対向する箇所に設けられた突条部を、一次樹脂部に食い込ませながら、共通金型が二次金型に接近させられる。両突条部が一次樹脂部に食い込んだ箇所は、隙間のない状態となる。 In this regard, according to the above manufacturing method, when the secondary molding die is closed in the secondary molding step, the ridges provided at the positions facing each other across the secondary gate are primary. The common mold is brought closer to the secondary mold while biting into the resin part. The part where both protrusions bite into the primary resin part is in a state where there is no gap.

そのため、圧力の高い溶融状態の二次樹脂材料が二次キャビティに充填される際、同二次樹脂材料が二次キャビティの外部へ流出（漏出）する現象が、両突条部によって妨げられる。従って、二次樹脂材料が上記隙間に入り込んで硬化してバリが発生する現象が、より効果的に抑制される。 Therefore, when the secondary resin material in a molten state with high pressure is filled in the secondary cavity, the phenomenon that the secondary resin material flows out (leaks) to the outside of the secondary cavity is hindered by both ridges. Therefore, the phenomenon that the secondary resin material enters the gap and is hardened to generate burrs is more effectively suppressed.

上記二色成形品の製造方法において、前記二次成形工程では、前記突条部を前記一次樹脂部に対し、０．０３ｍｍ～０．４ｍｍの深さ食い込ませることが好ましい。
上記の製造方法によれば、二次成形工程において、二次成形金型が型閉じされる際には、突条部が一次樹脂部に対し、０．０３ｍｍ～０．４ｍｍの深さ食い込ませられながら、共通金型が二次金型に接近させられる。 In the method for producing a two-color molded product, in the secondary molding step, it is preferable that the ridge portion bites into the primary resin portion to a depth of 0.03 mm to 0.4 mm.
According to the above manufacturing method, in the secondary molding step, when the secondary molding die is closed, the ridge portion bites into the primary resin portion to a depth of 0.03 mm to 0.4 mm. While being done, the common mold is brought closer to the secondary mold.

突条部の一次樹脂部に対する食い込み深さが０．０３ｍｍ以上に設定されることで、一次樹脂部が一次金型から取り外されてから二次金型に配置されるまでの期間に、一次樹脂部が収縮及び変形したり、一次樹脂部が二次金型に配置される際に位置ずれが生じたりしても、突条部が一次樹脂部に食い込んだ箇所は、隙間のない状態となる。二次樹脂材料が二次キャビティの外部へ流出（漏出）するのを妨げる効果が得られる。 By setting the bite depth to the primary resin part of the ridge part to 0.03 mm or more, the primary resin part is placed in the secondary mold after the primary resin part is removed from the primary mold. Even if the part shrinks and deforms, or if the primary resin part is misaligned when it is placed in the secondary mold, the part where the ridge part bites into the primary resin part will be in a state without a gap. .. The effect of preventing the secondary resin material from flowing out (leaking) to the outside of the secondary cavity can be obtained.

また、上記食い込み深さが０．４ｍｍ以下に設定されることで、上記の効果が得られるほか、二次成形金型の型閉じをスムーズに行わせる効果や、一次樹脂部の形状に影響を及ぼしにくくする効果が得られる。 Further, by setting the bite depth to 0.4 mm or less, the above effect can be obtained, the effect of smoothly closing the secondary molding die, and the shape of the primary resin portion are affected. The effect of making it difficult to exert can be obtained.

上記二色成形品の製造方法は、二色成形品として、自動車のダクトクォータベントを製造する際に適用されることが好ましい。 The above method for manufacturing a two-color molded product is preferably applied as a two-color molded product when manufacturing a duct quarter vent of an automobile.

上記二色成形品の製造方法によれば、二次樹脂部の成形時におけるバリの発生を抑制することができる。 According to the above-mentioned method for manufacturing a two-color molded product, it is possible to suppress the generation of burrs during molding of the secondary resin portion.

一実施形態における二色成形品の断面図。Sectional drawing of the two-color molded article in one Embodiment. 図１の２－２線断面図。FIG. 1 is a sectional view taken along line 2-2. 一実施形態における二色成形品の製造装置及び製造方法を示す図であり、一次成形金型及び二次成形金型がともに型開きされた状態を示す概略断面図。It is a figure which shows the manufacturing apparatus and manufacturing method of the two-color molded article in one Embodiment, and is the schematic sectional drawing which shows the state which both the primary molding die and the secondary molding die are opened. 図３の４－４線断面図。FIG. 3 is a sectional view taken along line 4-4 of FIG. 図３の５－５線断面図。FIG. 3 is a sectional view taken along line 5-5 of FIG. 一実施形態における一次成形金型及び二次成形金型がともに型閉じされた状態を示す概略断面図。A schematic cross-sectional view showing a state in which both the primary molding die and the secondary molding die in one embodiment are closed. 図６における一次キャビティに一次樹脂材料が充填されて一次樹脂部が成形された状態を示す概略断面図。FIG. 6 is a schematic cross-sectional view showing a state in which the primary resin material is filled in the primary cavity in FIG. 6 and the primary resin portion is molded. 一実施形態における共通金型により一次樹脂部を保持した状態の一次成形金型と、二次成形金型とが型開きされた状態を示す概略断面図。A schematic cross-sectional view showing a state in which a primary molding die in a state where a primary resin portion is held by a common mold in one embodiment and a state in which the secondary molding die is opened. 一実施形態における一次樹脂部を保持した共通金型が、二次成形金型の二次金型に対向する位置まで回転移動させられた状態を示す概略断面図。FIG. 6 is a schematic cross-sectional view showing a state in which a common mold holding a primary resin portion in one embodiment is rotationally moved to a position facing the secondary mold of the secondary molding mold. 一実施形態における一次成形金型と、共通金型により一次樹脂部を保持した状態の二次成形金型とがともに型閉じされた状態を示す概略断面図。A schematic cross-sectional view showing a state in which both the primary molding die in one embodiment and the secondary molding die in a state where the primary resin portion is held by a common mold are closed. 図１０の１１－１１線断面図。FIG. 10 is a sectional view taken along line 11-11. （ａ）は図１３の１２ａ－１２ａ線断面図、（ｂ）は図１２（ａ）の一部を拡大して示す部分断面図。(A) is a cross-sectional view taken along the line 12a-12a of FIG. 13, and (b) is a partial cross-sectional view showing a part of FIG. 12 (a) in an enlarged manner. 一実施形態における一次キャビティに一次樹脂材料が充填されて一次樹脂部が成形されるとともに、二次キャビティに二次樹脂材料が充填されて二次樹脂部が成形された状態を示す概略断面図。FIG. 6 is a schematic cross-sectional view showing a state in which a primary resin material is filled in a primary cavity in one embodiment to form a primary resin portion, and a secondary resin material is filled in a secondary cavity to form a secondary resin portion. 一実施形態における一次成形金型及び二次成形金型がともに型開きされた状態を示す概略断面図。A schematic cross-sectional view showing a state in which both the primary molding die and the secondary molding die in one embodiment are opened.

以下、二色成形品の製造方法を具体化した一実施形態について、図面を参照して説明する。
＜二色成形品１０について＞
最初に、本実施形態の製造方法によって製造される二色成形品について説明する。 Hereinafter, an embodiment embodying a method for manufacturing a two-color molded product will be described with reference to the drawings.
<About the two-color molded product 10>
First, a two-color molded product manufactured by the manufacturing method of the present embodiment will be described.

二色成形品としては、例えば、自動車の車室内を、外部からの埃等の侵入を抑制しつつ換気するためのダクトクォータベントが適しており、本実施形態では、このダクトクォータベントを二色成形品としている。 As the two-color molded product, for example, a duct quarter vent for ventilating the interior of an automobile while suppressing the intrusion of dust and the like from the outside is suitable, and in the present embodiment, this duct quarter vent is used in two colors. It is a molded product.

図１は、上記二色成形品（ダクトクォータベント）１０の概略構成を示している。また、図２は、図１における２－２線に沿った断面構造を示している。図１及び図２に示すように、二色成形品１０は、一次樹脂部１１及び二次樹脂部２１を一体的に成形することにより構成されている。 FIG. 1 shows a schematic configuration of the two-color molded product (duct quarter vent) 10. Further, FIG. 2 shows a cross-sectional structure along line 2-2 in FIG. As shown in FIGS. 1 and 2, the two-color molded product 10 is configured by integrally molding the primary resin portion 11 and the secondary resin portion 21.

一次樹脂部１１は、全体が一次樹脂材料１７によって形成されており、二色成形品１０の骨格部分を構成している。一次樹脂材料１７としては、ポリプロピレン（ＰＰ）等の硬質の樹脂材料が用いられている。なお、一次樹脂部１１の剛性を高めるために、フィラー入りポリプロピレン（ＰＰＦ）が一次樹脂材料１７として用いられてもよい。 The primary resin portion 11 is entirely formed of the primary resin material 17, and constitutes the skeleton portion of the two-color molded product 10. As the primary resin material 17, a hard resin material such as polypropylene (PP) is used. In addition, polypropylene (PPF) containing a filler may be used as the primary resin material 17 in order to increase the rigidity of the primary resin portion 11.

一次樹脂部１１は、筒状部１２と、その筒状部１２に一体に形成された複数のリブ１５及びフランジ部１６とを備えている。
筒状部１２は、後述する製造装置３０の駆動軸３１に沿って延び、かつ両端が開放された四角筒状等の筒状をなしている。筒状部１２の周方向における複数箇所には、同筒状部１２の外周面において開口する凹部１３が形成されている。 The primary resin portion 11 includes a tubular portion 12 and a plurality of ribs 15 and flange portions 16 integrally formed with the tubular portion 12.
The tubular portion 12 has a cylindrical shape such as a square cylinder extending along the drive shaft 31 of the manufacturing apparatus 30 described later and having both ends open. Recesses 13 that open on the outer peripheral surface of the tubular portion 12 are formed at a plurality of locations in the circumferential direction of the tubular portion 12.

複数のリブ１５は、筒状部１２の一方（図１では上方）の開放部分において、互いに平行に離間した状態で、紙面に直交する方向に配列されている。図１では、１つのリブ１５のみが図示されている。各リブ１５は、図１における左右方向へ延びて、両端部において筒状部１２に繋がっている。 The plurality of ribs 15 are arranged in a direction orthogonal to the paper surface in a state of being parallel to each other in an open portion of one of the tubular portions 12 (upper in FIG. 1). In FIG. 1, only one rib 15 is shown. Each rib 15 extends in the left-right direction in FIG. 1 and is connected to the tubular portion 12 at both ends.

フランジ部１６は、筒状部１２の外周面から外方へ突出した状態で、同筒状部１２の全周にわたって形成されており、四角環状等の環状をなしている。
これに対し、二次樹脂部２１は、全体が一次樹脂材料１７とは異なる種類、本実施形態では一次樹脂材料１７よりも軟質の二次樹脂材料２５によって形成されている。二次樹脂材料２５としては、例えば、ＴＰＯ（オレフィン系熱可塑性エラストマー）が用いられる。 The flange portion 16 is formed over the entire circumference of the tubular portion 12 in a state of protruding outward from the outer peripheral surface of the tubular portion 12, and forms an annular shape such as a square ring.
On the other hand, the secondary resin portion 21 is entirely formed of a type different from the primary resin material 17, and in the present embodiment, the secondary resin material 25 is softer than the primary resin material 17. As the secondary resin material 25, for example, TPO (olefin-based thermoplastic elastomer) is used.

二次樹脂部２１は、フランジ部２２と、そのフランジ部２２に一体に形成された弾性突出部２３及び縦壁部２４とを備えている。フランジ部２２は、上記一次樹脂部１１のフランジ部１６と同様、筒状部１２の外周面から外方へ突出した状態で、同筒状部１２の全周にわたって形成されている。フランジ部２２は、四角環状等の環状をなしており、一次樹脂部１１のフランジ部１６に対し、駆動軸３１に沿う方向に重ねられている。 The secondary resin portion 21 includes a flange portion 22, an elastic protrusion portion 23 integrally formed with the flange portion 22, and a vertical wall portion 24. Similar to the flange portion 16 of the primary resin portion 11, the flange portion 22 is formed over the entire circumference of the tubular portion 12 in a state of protruding outward from the outer peripheral surface of the tubular portion 12. The flange portion 22 has an annular shape such as a square annular shape, and is overlapped with the flange portion 16 of the primary resin portion 11 in a direction along the drive shaft 31.

弾性突出部２３は、フランジ部２２の外周面から斜め外方へ突出した状態で、同フランジ部２２の全周にわたって形成されており、四角環状等の環状をなしている。弾性突出部２３は、フランジ部２２から遠ざかるに従い厚みが小さくなるように形成されている。 The elastic protruding portion 23 is formed over the entire circumference of the flange portion 22 in a state of projecting diagonally outward from the outer peripheral surface of the flange portion 22, and forms an annular shape such as a square ring. The elastic protrusion 23 is formed so that the thickness decreases as the distance from the flange portion 22 increases.

縦壁部２４は、筒状部１２の周方向における複数箇所に設けられており、対応する上記凹部１３に入り込んでいる。各縦壁部２４の一方（図１の上方）の端部は、フランジ部２２に繋がっている。 The vertical wall portions 24 are provided at a plurality of locations in the circumferential direction of the tubular portion 12, and are inserted into the corresponding recesses 13. One end (upper part of FIG. 1) of each vertical wall portion 24 is connected to the flange portion 22.

筒状部１２であって、各縦壁部２４を筒状部１２の周方向における両側から挟み込む２箇所には、駆動軸３１に沿う方向に延びる押し込み跡１４が残っている。これらの押し込み跡１４は、二次樹脂部２１の成形に際し、二次成形金型４１が型締めされるときに突条部４５が一次樹脂部１１に食い込むことにより生じるものである。詳細については後述する。 In the tubular portion 12, push marks 14 extending in the direction along the drive shaft 31 remain at two locations where each vertical wall portion 24 is sandwiched from both sides in the circumferential direction of the tubular portion 12. These push-in marks 14 are generated by the ridge portion 45 biting into the primary resin portion 11 when the secondary molding die 41 is molded during the molding of the secondary resin portion 21. Details will be described later.

＜製造装置３０について＞
次に、図３を参照し、上記二色成形品１０の製造に用いられる製造装置３０について説明する。 <About manufacturing equipment 30>
Next, with reference to FIG. 3, a manufacturing apparatus 30 used for manufacturing the two-color molded product 10 will be described.

製造装置３０は、同一形状をなす２つの二色成形品１０を、タイミングをずらして成形するためのものである。この製造装置３０では、先行の二色成形品１０の成形サイクルが開始され、遅れて後続の二色成形品１０の成形サイクルが開始される。 The manufacturing apparatus 30 is for molding two two-color molded products 10 having the same shape at different timings. In this manufacturing apparatus 30, the molding cycle of the preceding two-color molded product 10 is started, and the molding cycle of the succeeding two-color molded product 10 is started later.

製造装置３０は、回転可能かつ軸方向（図３の上下方向）に往復動可能に設けられた駆動軸３１と、駆動軸３１の一方（図３の下方）の端部に固定された取り付け板３２と、一次樹脂部１１を成形するための一次成形金型３３と、二次樹脂部２１を成形するための二次成形金型４１とを備えている。 The manufacturing apparatus 30 has a drive shaft 31 provided so as to be rotatable and reciprocating in the axial direction (vertical direction in FIG. 3), and a mounting plate fixed to one end of the drive shaft 31 (lower part in FIG. 3). 32, a primary molding die 33 for molding the primary resin portion 11, and a secondary molding die 41 for molding the secondary resin portion 21 are provided.

一次成形金型３３は、固定型を構成する一次金型３４（図４参照）と、可動型を構成する２つの共通金型３５，３６とを備えている。また、二次成形金型４１は、固定型を構成する二次金型４２（図５参照）と、上記２つの共通金型３５，３６とを備えている。 The primary forming die 33 includes a primary die 34 (see FIG. 4) constituting a fixed die and two common dies 35 and 36 constituting a movable die. Further, the secondary molding die 41 includes a secondary die 42 (see FIG. 5) constituting a fixed mold and the above two common dies 35 and 36.

一次金型３４及び二次金型４２は、互いに異なる形状に形成されており、上記駆動軸３１の径方向に並べられた状態で移動不能に配置されている。
両共通金型３５，３６は、互いに同一の形状に形成されている。両共通金型３５，３６は、一次成形金型３３の一部を構成し、また二次成形金型４１の一部を構成している。 The primary mold 34 and the secondary mold 42 are formed in different shapes from each other, and are arranged immovably in a state of being arranged in the radial direction of the drive shaft 31.
Both common molds 35 and 36 are formed in the same shape as each other. Both common dies 35 and 36 form a part of the primary forming die 33 and also form a part of the secondary forming die 41.

両共通金型３５，３６は、駆動軸３１の径方向に並べられた状態で取り付け板３２に固定されている。そして、図３に示すように、一方の共通金型３５を一次金型３４に対向させるとともに、他方の共通金型３６を二次金型４２に対向させることが可能である。また、図９に示すように、駆動軸３１を取り付け板３２とともに回転させることで、上記他方の共通金型３６を一次金型３４に対向させるとともに、上記一方の共通金型３５を二次金型４２に対向させることが可能である。 Both common molds 35 and 36 are fixed to the mounting plate 32 in a state of being arranged in the radial direction of the drive shaft 31. Then, as shown in FIG. 3, it is possible to make one common mold 35 face the primary mold 34 and the other common mold 36 to face the secondary mold 42. Further, as shown in FIG. 9, by rotating the drive shaft 31 together with the mounting plate 32, the other common mold 36 is made to face the primary mold 34, and the common mold 35 is made to face the secondary mold 35. It is possible to face the mold 42.

さらに、上記駆動軸３１を取り付け板３２及び両共通金型３５，３６とともに、同駆動軸３１に沿う方向のうち、一次金型３４及び二次金型４２に近づく側へ移動させることで、一次成形金型３３及び二次成形金型４１をともに同期させた状態で型閉じすることが可能である（図６、図１０参照）。 Further, the drive shaft 31 is moved together with the mounting plate 32 and the common molds 35 and 36 toward the primary mold 34 and the secondary mold 42 in the direction along the drive shaft 31. It is possible to close the mold 33 and the secondary mold 41 in a synchronized state (see FIGS. 6 and 10).

また、上記駆動軸３１を取り付け板３２及び両共通金型３５，３６とともに、同駆動軸３１に沿う方向のうち、一次金型３４及び二次金型４２から遠ざかる側へ移動させることで、一次成形金型３３及び二次成形金型４１をともに同期させた状態で型開きすることが可能である（図３、図８、図１４参照）。 Further, by moving the drive shaft 31 together with the mounting plate 32 and the common molds 35 and 36 to the side away from the primary mold 34 and the secondary mold 42 in the direction along the drive shaft 31, the primary is performed. It is possible to open the molds in a state where both the molds 33 and the secondary molds 41 are synchronized (see FIGS. 3, 8, and 14).

なお、一次成形金型３３の型閉じ及び型開きには、一次樹脂部１１の保持されていない共通金型３５，３６が一次金型３４に対し、接近及び離間させられることによりなされる場合が含まれる（図３、図６、図９、図１０参照）。また、一次成形金型３３の型閉じ及び型開きには、一次樹脂部１１の保持された共通金型３５，３６が一次金型３４に対し、接近及び離間させられることによりなされる場合も含まれる（図７、図８、図１３、図１４参照）。 The mold closing and mold opening of the primary molding mold 33 may be performed by moving the common molds 35 and 36, in which the primary resin portion 11 is not held, close to and separated from the primary mold 34. Included (see FIGS. 3, 6, 9, and 10). Further, the mold closing and mold opening of the primary molding mold 33 includes the case where the common molds 35 and 36 held by the primary resin portion 11 are brought close to and separated from the primary mold 34. (See FIGS. 7, 8, 13, and 14).

また、二次成形金型４１の型閉じ及び型開きには、一次樹脂部１１及び二次樹脂部２１のいずれも保持されていない共通金型３５，３６が二次金型４２に対し、接近及び離間させられることによりなされる場合が含まれる（図３、図６、図７、図８参照）。また、二次成形金型４１の型閉じ及び型開きには、一次樹脂部１１及び二次樹脂部２１のうち少なくとも一次樹脂部１１の保持された共通金型３５，３６が二次金型４２に対し、接近及び離間させられることによりなされる場合も含まれる（図９、図１０、図１３、図１４参照）。 Further, in closing and opening the mold of the secondary molding mold 41, the common molds 35 and 36 in which neither the primary resin portion 11 nor the secondary resin portion 21 is held approach the secondary mold 42. And by being separated (see FIGS. 3, 6, 7, 8). Further, for closing and opening the mold of the secondary molding mold 41, the common molds 35 and 36 in which at least the primary resin portion 11 of the primary resin portion 11 and the secondary resin portion 21 is held are used as the secondary mold 42. On the other hand, the case where it is made by approaching and separating from each other is also included (see FIGS. 9, 10, 13, and 14).

図６及び図１０に示すように、一次樹脂部１１の保持されていない共通金型３５，３６が一次金型３４に対し接近されることにより、一次成形金型３３が型閉じされたときには、共通金型３５，３６と一次金型３４との間に、一次樹脂部１１を成形するための空間である一次キャビティ３７が形成される。図６に示すように、共通金型３５，３６において一次キャビティ３７に面する複数箇所には、一次キャビティ３７への一次樹脂材料１７の入口である一次ゲート３８が設けられている。各一次ゲート３８は、共通金型３５，３６において、一次樹脂部１１の上記リブ１５（図１、図７参照）を成形する箇所に設定されている。 As shown in FIGS. 6 and 10, when the primary molding die 33 is closed by bringing the common molds 35 and 36, which are not held by the primary resin portion 11, closer to the primary mold 34, A primary cavity 37, which is a space for forming the primary resin portion 11, is formed between the common molds 35 and 36 and the primary mold 34. As shown in FIG. 6, in the common molds 35 and 36, the primary gate 38, which is the inlet of the primary resin material 17 to the primary cavity 37, is provided at a plurality of locations facing the primary cavity 37. Each primary gate 38 is set at a position where the rib 15 (see FIGS. 1 and 7) of the primary resin portion 11 is formed in the common molds 35 and 36.

また、図９及び図１０に示すように、一次樹脂部１１の保持された共通金型３５（３６）が二次金型４２に対し接近されることにより、二次成形金型４１が型閉じされたときには、一次樹脂部１１と共通金型３５（３６）と二次金型４２との間に、二次樹脂部２１を成形するための空間である二次キャビティ４３が形成される。図１０、図１１及び図１２（ａ）に示すように、二次金型４２において二次キャビティ４３に面する複数箇所には、同二次キャビティ４３への二次樹脂材料２５の入口である二次ゲート４４が設けられている。各二次ゲート４４は、二次金型４２において、二次樹脂部２１の各縦壁部２４を成形する箇所、より詳しくは、筒状部１２の周方向における中央部分に設定されている。 Further, as shown in FIGS. 9 and 10, the common mold 35 (36) held by the primary resin portion 11 is brought close to the secondary mold 42, so that the secondary molding mold 41 is closed. When this is done, a secondary cavity 43, which is a space for molding the secondary resin portion 21, is formed between the primary resin portion 11, the common mold 35 (36), and the secondary mold 42. As shown in FIGS. 10, 11 and 12 (a), a plurality of locations facing the secondary cavity 43 in the secondary mold 42 are inlets of the secondary resin material 25 to the secondary cavity 43. A secondary gate 44 is provided. Each secondary gate 44 is set in the secondary mold 42 at a position where each vertical wall portion 24 of the secondary resin portion 21 is formed, more specifically, at a central portion in the circumferential direction of the tubular portion 12.

さらに、図５及び図１１に示すように、二次金型４２は、上記駆動軸３１に沿って延びる複数の突条部４５を備えている。ここでの複数とは、上記一次樹脂部１１における凹部１３の数の２倍の数である。表現を変えると、突条部４５は、凹部１３毎に２つずつ設けられている。凹部１３毎の２つの突条部４５は、一次樹脂部１１における筒状部１２であって、各凹部１３を同筒状部１２の周方向における両側から挟み込む箇所に設けられている。表現を変えると、凹部１３毎の２つの突条部４５は、各二次ゲート４４を挟んで相対向する箇所に設けられている。 Further, as shown in FIGS. 5 and 11, the secondary mold 42 includes a plurality of ridges 45 extending along the drive shaft 31. The plurality here is twice the number of the recesses 13 in the primary resin portion 11. In other words, two ridges 45 are provided for each recess 13. The two ridges 45 for each recess 13 are tubular portions 12 in the primary resin portion 11, and are provided at locations where each recess 13 is sandwiched from both sides in the circumferential direction of the tubular portion 12. In other words, the two ridges 45 for each recess 13 are provided at locations facing each other with the secondary gates 44 in between.

図１２（ａ），（ｂ）に示すように、各突条部４５は、半円形の断面形状を有している。各突条部４５は、凹部１３に接近した箇所に設けられることが望ましく、本実施形態では、各突条部４５と凹部１３との間隔Ｄ１が０．２ｍｍに設定されている。 As shown in FIGS. 12 (a) and 12 (b), each ridge portion 45 has a semi-circular cross-sectional shape. It is desirable that each ridge portion 45 is provided at a position close to the recess 13, and in the present embodiment, the distance D1 between each ridge portion 45 and the recess 13 is set to 0.2 mm.

筒状部１２の周方向における各突条部４５の寸法を幅Ｗ１とすると、本実施形態では幅Ｗ１が、０．６ｍｍに設定されている。さらに、各突条部４５の二次金型４２からの突出長さＬ１は、０．０３ｍｍ～０．４ｍｍであることが望ましく、本実施形態では、０．４ｍｍに設定されている。 Assuming that the dimension of each ridge portion 45 in the circumferential direction of the tubular portion 12 is the width W1, the width W1 is set to 0.6 mm in this embodiment. Further, the protrusion length L1 of each ridge portion 45 from the secondary mold 42 is preferably 0.03 mm to 0.4 mm, and is set to 0.4 mm in the present embodiment.

＜二色成形品１０の製造方法について＞
次に、本実施形態の作用として、上記製造装置３０を用いて、複数の二色成形品１０を、互いにタイミングをずらして製造する方法について、効果とともに説明する。 <Manufacturing method of two-color molded product 10>
Next, as an operation of the present embodiment, a method of manufacturing a plurality of two-color molded products 10 at different timings from each other by using the manufacturing apparatus 30 will be described together with the effects.

各二色成形品１０の成形サイクルは、一次成形工程及び二次成形工程によって構成されている。後続の二色成形品１０の成形サイクルは、先行の二色成形品１０の成形サイクルの途中から開始される。そのため、本実施形態では、先行の二色成形品１０の成形サイクルを中心に説明する。 The molding cycle of each two-color molded product 10 is composed of a primary molding step and a secondary molding step. The subsequent molding cycle of the two-color molded product 10 is started in the middle of the molding cycle of the preceding two-color molded product 10. Therefore, in the present embodiment, the molding cycle of the preceding two-color molded product 10 will be mainly described.

＜一次成形工程＞
一次成形工程は、一次成形金型３３を用いて一次樹脂材料１７によって一次樹脂部１１を成形する工程である。 <Primary molding process>
The primary molding step is a step of molding the primary resin portion 11 with the primary resin material 17 using the primary molding die 33.

一次成形工程は、図３に示すように、一次成形金型３３及び二次金型４２がともに型開きされた状態で開始される。この状態では、共通金型３５が一次金型３４から図３の上側へ離間し、共通金型３６が二次金型４２から図３の上側へ離間している。 As shown in FIG. 3, the primary molding step is started in a state where both the primary molding die 33 and the secondary die 42 are opened. In this state, the common mold 35 is separated from the primary mold 34 to the upper side of FIG. 3, and the common mold 36 is separated from the secondary mold 42 to the upper side of FIG.

図３において二点鎖線の矢印Ａで示すように、駆動軸３１が取り付け板３２及び両共通金型３５，３６を伴い、一次金型３４及び二次金型４２に接近する側（図３の下側）へ移動されることにより、図６に示すように、一次成形金型３３及び二次成形金型４１がともに型閉じされる。一次成形金型３３では、一次金型３４及び共通金型３５の間に一次キャビティ３７が形成される。 As shown by the arrow A of the two-dot chain line in FIG. 3, the drive shaft 31 is accompanied by the mounting plate 32 and the common molds 35 and 36, and is close to the primary mold 34 and the secondary mold 42 (FIG. 3). By moving to the lower side), both the primary forming die 33 and the secondary forming die 41 are closed as shown in FIG. In the primary mold 33, the primary cavity 37 is formed between the primary mold 34 and the common mold 35.

共通金型３５において一次キャビティ３７に面する複数箇所に設けられた一次ゲート３８から溶融状態の一次樹脂材料１７が一次キャビティ３７内に充填される。図７に示すように、一次キャビティ３７内で一次樹脂材料１７が硬化されることにより、二次樹脂部２１よりも硬質の一次樹脂部１１が成形される。 In the common mold 35, the primary resin material 17 in a molten state is filled in the primary cavity 37 from the primary gates 38 provided at a plurality of locations facing the primary cavity 37. As shown in FIG. 7, the primary resin material 17 is cured in the primary cavity 37 to form the primary resin portion 11 which is harder than the secondary resin portion 21.

＜二次成形工程＞
図７において、二点鎖線の矢印Ｂで示すように、駆動軸３１が取り付け板３２及び両共通金型３５，３６を伴い、一次金型３４及び二次金型４２から離間する側（図７の上側）へ移動されることにより、図８に示すように、一次成形金型３３及び二次成形金型４１がともに型開きされる。一次成形金型３３の型開きは、一次樹脂部１１の保持された共通金型３５が一次金型３４から離間する側（図８の上側）へ移動することによりなされる。この型開きにより、一次樹脂部１１が一次金型３４から取り外される。 <Secondary molding process>
In FIG. 7, as shown by the arrow B of the alternate long and short dash line, the drive shaft 31 is provided with the mounting plate 32 and the common molds 35 and 36, and is separated from the primary mold 34 and the secondary mold 42 (FIG. 7). As shown in FIG. 8, both the primary forming die 33 and the secondary forming die 41 are opened. The mold opening of the primary molding mold 33 is performed by moving the common mold 35 held by the primary resin portion 11 to the side (upper side in FIG. 8) away from the primary mold 34. By this mold opening, the primary resin portion 11 is removed from the primary mold 34.

次に、共通金型３５，３６の取り付けられた取り付け板３２が駆動軸３１を中心として二点鎖線の矢印Ｃで示すように回転される。この回転により、共通金型３５が一次金型３４に対向する位置（図８）から、二次金型４２に対向する位置（図９）に移動させられる。また、共通金型３６が二次金型４２に対向する位置（図８）から、一次金型３４に対向する位置（図９）に移動させられ、上記図３と同様の状態となる。一次成形金型３３では、後続の二色成形品１０を製造するためのサイクルが開始される。 Next, the mounting plate 32 to which the common molds 35 and 36 are mounted is rotated around the drive shaft 31 as shown by the arrow C of the alternate long and short dash line. By this rotation, the common mold 35 is moved from the position facing the primary mold 34 (FIG. 8) to the position facing the secondary mold 42 (FIG. 9). Further, the common mold 36 is moved from the position facing the secondary mold 42 (FIG. 8) to the position facing the primary mold 34 (FIG. 9), and the state is the same as in FIG. 3 above. In the primary molding die 33, a cycle for manufacturing the subsequent two-color molded product 10 is started.

続いて、図９において二点鎖線の矢印Ｄで示すように、駆動軸３１が取り付け板３２及び両共通金型３６，３５を伴い、一次金型３４及び二次金型４２に接近する側（図９の下側）へ移動されることにより、一次成形金型３３及び二次成形金型４１が型閉じされる。この型閉じにより、図１０に示すように、一次樹脂部１１が二次金型４２に配置（セット）される。一次成形金型３３では、一次金型３４及び共通金型３６の間に、後続の二色成形品１０における一次樹脂部１１を成形するための一次キャビティ３７が形成される。また、二次成形金型４１では、一次樹脂部１１と共通金型３５と二次金型４２との間に二次キャビティ４３が形成される。 Subsequently, as shown by the arrow D of the alternate long and short dash line in FIG. 9, the drive shaft 31 is accompanied by the mounting plate 32 and the common molds 36 and 35, and the side approaching the primary mold 34 and the secondary mold 42 ( By moving to the lower side of FIG. 9, the primary molding die 33 and the secondary forming die 41 are closed. By closing the mold, as shown in FIG. 10, the primary resin portion 11 is arranged (set) in the secondary mold 42. In the primary molding die 33, a primary cavity 37 for molding the primary resin portion 11 in the subsequent two-color molded product 10 is formed between the primary mold 34 and the common mold 36. Further, in the secondary molding die 41, the secondary cavity 43 is formed between the primary resin portion 11, the common mold 35, and the secondary mold 42.

二次金型４２において二次キャビティ４３に面する複数箇所に設けられた二次ゲート４４を通じて溶融状態の二次樹脂材料２５が、同二次キャビティ４３に充填される。図１３に示すように、二次キャビティ４３内で二次樹脂材料２５が硬化されることにより、フランジ部２２及び縦壁部２４において一次樹脂部１１に接触し、かつ一次樹脂部１１よりも軟質の二次樹脂部２１が、一次樹脂部１１に対し一体となった状態で成形される。 In the secondary mold 42, the secondary resin material 25 in a molten state is filled in the secondary cavity 43 through the secondary gates 44 provided at a plurality of locations facing the secondary cavity 43. As shown in FIG. 13, by curing the secondary resin material 25 in the secondary cavity 43, the flange portion 22 and the vertical wall portion 24 come into contact with the primary resin portion 11 and are softer than the primary resin portion 11. The secondary resin portion 21 of the above is molded in a state of being integrated with the primary resin portion 11.

また、図１０に示すように、共通金型３６において一次キャビティ３７に面する複数箇所に設けられた一次ゲート３８を通じて溶融状態の一次樹脂材料１７が一次キャビティ３７内に充填される。図１３に示すように、一次キャビティ３７内で一次樹脂材料１７が硬化されることにより、後続の二色成形品１０における一次樹脂部１１が成形される。 Further, as shown in FIG. 10, in the common mold 36, the primary resin material 17 in a molten state is filled in the primary cavity 37 through the primary gates 38 provided at a plurality of locations facing the primary cavity 37. As shown in FIG. 13, the primary resin material 17 is cured in the primary cavity 37 to form the primary resin portion 11 in the subsequent two-color molded product 10.

ここで、一次樹脂部１１が図８に示すように、一次金型３４から取り外されてから、図１０に示すように、二次金型４２に配置（セット）されるまでの期間に、一次樹脂部１１が収縮したり、変形したりするおそれがある。また、一次樹脂部１１が二次金型４２に配置される際に位置ずれが生ずるおそれもある。そして、このように収縮、変形等した一次樹脂部１１が二次金型４２に配置されたり、位置ずれが発生したりすると、二次金型４２と一次樹脂部１１との間であって二次キャビティ４３の外側に隣接する箇所に隙間が発生しやすくなる。この状態で、二次樹脂材料２５が二次ゲート４４を通じて二次キャビティ４３に充填されると、その二次樹脂材料２５の一部が上記隙間に入り込もうとする。 Here, as shown in FIG. 8, the primary resin portion 11 is removed from the primary mold 34 and is placed (set) in the secondary mold 42 as shown in FIG. The resin portion 11 may shrink or be deformed. Further, when the primary resin portion 11 is arranged in the secondary mold 42, there is a possibility that the position shift may occur. When the primary resin portion 11 that has been shrunk or deformed in this way is arranged in the secondary mold 42 or a misalignment occurs, the secondary mold 42 and the primary resin portion 11 are located between the secondary mold 42 and the primary resin portion 11. A gap is likely to occur in a portion adjacent to the outside of the next cavity 43. In this state, when the secondary resin material 25 is filled in the secondary cavity 43 through the secondary gate 44, a part of the secondary resin material 25 tends to enter the gap.

しかし、上記二次成形工程では、図９に示すように二次金型４２として、型閉じ方向、すなわち、駆動軸３１に沿う方向のうち、共通金型３５（３６）が二次金型４２に近づく方向に延びる突条部４５を有するものが用いられる。 However, in the secondary molding step, as shown in FIG. 9, as the secondary mold 42, the common mold 35 (36) is the secondary mold 42 in the mold closing direction, that is, the direction along the drive shaft 31. Those having a ridge portion 45 extending in a direction approaching the above are used.

そして、二次成形金型４１が型閉じされる際に、硬質の突条部４５を、二次樹脂部２１よりも硬質の一次樹脂部１１のうち、二次キャビティ４３の周囲となる箇所に食い込ませながら（一次樹脂部１１を変形させながら）、図９において二点鎖線の矢印Ｅで示すように、共通金型３５が二次金型４２に接近させられる。 Then, when the secondary molding die 41 is closed, the hard ridge portion 45 is placed around the secondary cavity 43 in the primary resin portion 11 which is harder than the secondary resin portion 21. The common mold 35 is brought closer to the secondary mold 42 as shown by the arrow E of the alternate long and short dash line in FIG. 9 while biting into the mold (while deforming the primary resin portion 11).

図１２（ａ），（ｂ）に示すように、各突条部４５が一次樹脂部１１に食い込んだ箇所は、同突条部４５と同一次樹脂部１１との間に隙間のない状態となり、二次樹脂材料２５が二次キャビティ４３の外部へ流出（漏出）するのを妨げる。硬質の一次樹脂部１１は、二次樹脂材料２５の高い圧力が作用しても変形しにくい。一次樹脂部１１と突条部４５との間は隙間の少ない状態に保持され、二次樹脂材料２５が流出（漏出）しにくい。従って、二次樹脂材料２５が上記隙間に入り込んで硬化してバリが発生するのを抑制することができる。 As shown in FIGS. 12 (a) and 12 (b), there is no gap between the ridge portion 45 and the same primary resin portion 11 at the portion where each ridge portion 45 bites into the primary resin portion 11. , Prevents the secondary resin material 25 from flowing out (leaking) to the outside of the secondary cavity 43. The hard primary resin portion 11 is not easily deformed even when a high pressure of the secondary resin material 25 is applied. The space between the primary resin portion 11 and the ridge portion 45 is maintained in a state where there is little gap, and the secondary resin material 25 is unlikely to flow out (leak). Therefore, it is possible to prevent the secondary resin material 25 from entering the gap and hardening to generate burrs.

特に、図１１及び図１２（ａ）に示すように、二次成形工程において、溶融状態の二次樹脂材料２５が二次キャビティ４３に充填される際、同二次キャビティ４３での二次樹脂材料２５の圧力は、二次樹脂材料２５が二次キャビティ４３へ流れ込む入口である二次ゲート４４において最も高くなる。 In particular, as shown in FIGS. 11 and 12A, when the secondary resin material 25 in a molten state is filled in the secondary cavity 43 in the secondary molding step, the secondary resin in the secondary cavity 43 is filled. The pressure of the material 25 is highest at the secondary gate 44, which is the inlet through which the secondary resin material 25 flows into the secondary cavity 43.

この点、本実施形態の製造方法によれば、二次成形工程での二次成形金型４１が型閉じされる際には、二次ゲート４４を挟んで相対向する箇所に設けられた突条部４５が、一次樹脂部１１に食い込みながら、共通金型３５が二次金型４２に接近させられる（図９参照）。両突条部４５が一次樹脂部１１に食い込んだ箇所は、隙間のない状態となる。 In this respect, according to the manufacturing method of the present embodiment, when the secondary molding die 41 in the secondary molding step is closed, the protrusions provided at the positions facing each other across the secondary gate 44. The common mold 35 is brought closer to the secondary mold 42 while the strip portion 45 bites into the primary resin portion 11 (see FIG. 9). The portion where both the ridge portions 45 bite into the primary resin portion 11 is in a state where there is no gap.

そのため、圧力の高い溶融状態の二次樹脂材料２５が二次キャビティ４３に充填される際に、同二次キャビティ４３の外部へ流出（漏出）する現象が、両突条部４５によって妨げられる。従って、二次樹脂材料２５が上記隙間に入り込んで硬化してバリが発生する上記現象を、より効果的に抑制することができる。 Therefore, when the secondary resin material 25 in a molten state with high pressure is filled in the secondary cavity 43, the phenomenon of flowing out (leaking) to the outside of the secondary cavity 43 is hindered by the double ridges 45. Therefore, the above-mentioned phenomenon in which the secondary resin material 25 enters the gap and is hardened to generate burrs can be more effectively suppressed.

また、二次成形工程において、二次成形金型４１が型閉じされる際には、図１２（ｂ）に示すように、各突条部４５が一次樹脂部１１に対し、各突条部４５の二次金型４２からの突出長さＬ１と同じ量、すなわち、０．０３ｍｍ～０．４ｍｍの深さ、食い込ませられながら、共通金型３５が二次金型４２に接近させられる（図９、図１０参照）。 Further, in the secondary molding step, when the secondary molding die 41 is closed, as shown in FIG. 12B, each ridge portion 45 has a ridge portion with respect to the primary resin portion 11. The common mold 35 is brought closer to the secondary mold 42 while being bitten into the same amount as the protrusion length L1 from the secondary mold 42 of 45, that is, at a depth of 0.03 mm to 0.4 mm (. 9 and 10).

各突条部４５の一次樹脂部１１に対する食い込み深さは、０．０３ｍｍ以上である。このことから、一次樹脂部１１が一次金型３４から取り外されてから二次金型４２に配置されるまでの期間に、一次樹脂部１１が収縮及び変形したり、一次樹脂部１１が二次金型４２に配置される際に位置ずれが生じたりしても、各突条部４５が一次樹脂部１１に食い込んだ箇所は、隙間のない状態となる。従って、二次樹脂材料２５が二次キャビティ４３の外部へ流出（漏出）するのを妨げる効果が得られる。 The bite depth of each ridge portion 45 with respect to the primary resin portion 11 is 0.03 mm or more. For this reason, during the period from when the primary resin portion 11 is removed from the primary mold 34 until it is placed in the secondary mold 42, the primary resin portion 11 shrinks and deforms, and the primary resin portion 11 becomes secondary. Even if the position shift occurs when the mold 42 is arranged, the portion where each ridge portion 45 bites into the primary resin portion 11 is in a state without a gap. Therefore, the effect of preventing the secondary resin material 25 from flowing out (leaking) to the outside of the secondary cavity 43 can be obtained.

また、上記食い込み深さが０．４ｍｍ以下であることから、上記の効果が得られるほか、二次成形金型４１の型閉じをスムーズに行わせることができる。また、一次樹脂部１１の形状に影響を及ぼしにくくすることができる。 Further, since the biting depth is 0.4 mm or less, the above-mentioned effect can be obtained, and the secondary molding die 41 can be smoothly closed. Further, it is possible to make it difficult to affect the shape of the primary resin portion 11.

そして、図１３において二点鎖線の矢印Ｆで示すように、駆動軸３１が取り付け板３２及び両共通金型３６，３５を伴い、一次金型３４及び二次金型４２から離間する側（図１３の上側）へ移動されることにより、図１４に示すように、一次成形金型３３及び二次成形金型４１が型開きされる。 Then, as shown by the arrow F of the alternate long and short dash line in FIG. 13, the drive shaft 31 is provided with the mounting plate 32 and the common molds 36 and 35, and is separated from the primary mold 34 and the secondary mold 42 (FIG. 13). By moving to the upper side of 13), as shown in FIG. 14, the primary forming die 33 and the secondary forming die 41 are opened.

一次成形金型３３の型開きは、後続の二色成形品１０における一次樹脂部１１の保持された共通金型３６が、一次金型３４から離間する側（図１４の上側）へ移動することによりなされる。この型開きにより、一次樹脂部１１が一次金型３４から取り外される。一次成形金型３３は、上述した図８と同様の状態になる。 The mold opening of the primary mold 33 is such that the common mold 36 held by the primary resin portion 11 in the subsequent two-color molded product 10 moves to the side separated from the primary mold 34 (upper side in FIG. 14). Made by. By this mold opening, the primary resin portion 11 is removed from the primary mold 34. The primary molding die 33 is in the same state as in FIG. 8 described above.

図１４に示すように、二次成形金型４１の型開きは、先行の二色成形品１０の保持された共通金型３５が二次金型４２から離間する側（図１４の上側）へ移動することによりなされる。その後、二色成形品１０が共通金型３５から取り出されることで、先行の二色成形品１０を製造するサイクルが終了する。 As shown in FIG. 14, the mold opening of the secondary molding die 41 is to the side where the common mold 35 held by the preceding two-color molded product 10 is separated from the secondary mold 42 (upper side in FIG. 14). It is done by moving. After that, the two-color molded product 10 is taken out from the common mold 35, and the cycle for manufacturing the preceding two-color molded product 10 is completed.

その後は、製造装置３０は、上述した図９、図１０、図１３及び図１４を用いて説明した先行の二色成形品１０を成形するための作動と同様に作動することで、後続の二色成形品１０を成形する。 After that, the manufacturing apparatus 30 operates in the same manner as the operation for molding the preceding two-color molded product 10 described with reference to FIGS. 9, 10, 13 and 14 described above, thereby causing the subsequent two. The color molded product 10 is molded.

なお、上記実施形態は、これを以下のように変更した変形例として実施することもできる。
・一次樹脂部１１が上記実施形態とは異なる種類の一次樹脂材料１７によって形成されてもよい。同様に、二次樹脂部２１が上記実施形態とは異なる種類の二次樹脂材料２５によって形成されてもよい。 It should be noted that the above embodiment can also be implemented as a modified example in which this is modified as follows.
The primary resin portion 11 may be formed of a primary resin material 17 of a type different from that of the above embodiment. Similarly, the secondary resin portion 21 may be formed of a secondary resin material 25 of a type different from that of the above embodiment.

・二次樹脂部２１が、一次樹脂材料１７とは異なる種類であることを条件に、同一次樹脂材料１７と同様に硬質の二次樹脂材料２５によって形成されてもよい。
・各突条部４５の断面形状が半円形とは異なる形状に変更されてもよい。 -The secondary resin portion 21 may be formed of the hard secondary resin material 25 as in the same primary resin material 17, provided that the secondary resin portion 21 is of a different type from the primary resin material 17.
-The cross-sectional shape of each ridge portion 45 may be changed to a shape different from the semicircular shape.

・共通金型３５，３６を、一次金型３４に対向する位置から、二次金型４２に対向する位置へ移動させる場合、又は後者の位置から前者の位置へ移動させる場合、それらの移動が回転とは異なる動作によって行われてもよい。 -When moving the common molds 35 and 36 from the position facing the primary mold 34 to the position facing the secondary mold 42, or when moving from the latter position to the former position, those movements are performed. It may be performed by an operation different from the rotation.

・上記二色成形品の製造方法は、二次成形工程において、一次樹脂部１１が一次金型３４から取り外されて二次金型４２に配置（セット）される動作が含まれる製造方法であれば、ダクトクォータベントとは異なる二色成形品を製造する際にも広く適用可能である。 The manufacturing method of the above-mentioned two-color molded product may be a manufacturing method including an operation in which the primary resin portion 11 is removed from the primary mold 34 and placed (set) in the secondary mold 42 in the secondary molding step. For example, it can be widely applied when manufacturing a two-color molded product different from the duct quarter vent.

１０…二色成形品、１１…一次樹脂部、１７…一次樹脂材料、２１…二次樹脂部、２５…二次樹脂材料、３３…一次成形金型、３４…一次金型、３５，３６…共通金型、３７…一次キャビティ、４１…二次成形金型、４２…二次金型、４３…二次キャビティ、４４…二次ゲート、４５…突条部。 10 ... Two-color molded product, 11 ... Primary resin part, 17 ... Primary resin material, 21 ... Secondary resin part, 25 ... Secondary resin material, 33 ... Primary molding mold, 34 ... Primary mold, 35, 36 ... Common mold, 37 ... primary cavity, 41 ... secondary molding mold, 42 ... secondary mold, 43 ... secondary cavity, 44 ... secondary gate, 45 ... ridge.

Claims (4)

共通金型及び一次金型を備える一次成形金型と、前記共通金型及び二次金型を備える二次成形金型とを用いて、一次樹脂材料からなる一次樹脂部と、二次樹脂材料からなる二次樹脂部とを一体的に成形してなる二色成形品を製造する方法であって、
前記一次成形金型の型閉じに際し、前記一次金型及び前記共通金型の間に形成される一次キャビティに前記一次樹脂材料を充填して前記一次樹脂部を成形する一次成形工程と、
前記一次成形金型及び前記二次成形金型をともに型開きし、前記一次樹脂部が保持された状態の前記共通金型を、前記一次金型に対向する位置から前記二次金型に対向する位置へ移動させた後、前記一次成形金型及び前記二次成形金型を型閉じすることで、前記共通金型、前記一次樹脂部及び前記二次金型の間に二次キャビティを形成し、前記二次樹脂材料を二次ゲートから前記二次キャビティに充填して、前記一次樹脂部に接触した状態の前記二次樹脂部を成形する二次成形工程とを備え、前記二次成形工程では、前記二次金型として、型閉じ方向に延びる突条部を有するものを用い、前記二次成形金型の型閉じの際には、前記突条部を前記一次樹脂部のうち、前記二次キャビティの周囲となる箇所に食い込ませながら、前記共通金型を前記二次金型に接近させ、
前記二次成形工程では、前記二次金型として、前記突条部が、前記二次ゲートを挟んで相対向する箇所に設けられたものが用いられる二色成形品の製造方法。 Using a primary molding die provided with a common mold and a primary mold and a secondary molding die provided with the common mold and a secondary mold, a primary resin portion made of a primary resin material and a secondary resin material are used. It is a method of manufacturing a two-color molded product that is integrally molded with a secondary resin portion made of.
A primary molding step of filling the primary resin material in the primary cavity formed between the primary mold and the common mold when closing the primary molding mold to form the primary resin portion.
The primary molding die and the secondary molding die are both opened, and the common mold in a state where the primary resin portion is held faces the secondary mold from a position facing the primary mold. By closing the primary molding die and the secondary molding die after moving to the position to be formed, a secondary cavity is formed between the common mold, the primary resin portion and the secondary mold. The secondary molding step is provided by filling the secondary cavity with the secondary resin material from the secondary gate and molding the secondary resin portion in contact with the primary resin portion. In the step, as the secondary mold, a mold having a ridge portion extending in the mold closing direction is used, and when the mold is closed, the ridge portion is used among the primary resin portions. The common mold is brought closer to the secondary mold while biting into a portion around the secondary cavity.
In the secondary molding step, a method for manufacturing a two-color molded product is used in which, as the secondary mold, the ridges are provided at positions facing each other across the secondary gate . 前記一次成形工程では、前記二次樹脂材料よりも硬質の前記一次樹脂材料が用いられて前記一次樹脂部が成形される請求項１に記載の二色成形品の製造方法。 The method for producing a two-color molded product according to claim 1, wherein in the primary molding step, the primary resin material that is harder than the secondary resin material is used to form the primary resin portion. 前記二次成形工程では、前記突条部を前記一次樹脂部に対し、０．０３ｍｍ～０．４ｍｍの深さ食い込ませる請求項１又は２に記載の二色成形品の製造方法。 The method for producing a two-color molded product according to claim 1 or 2 , wherein in the secondary molding step, the ridge portion is made to bite into the primary resin portion to a depth of 0.03 mm to 0.4 mm. 前記二色成形品は自動車のダクトクォータベントである請求項１～３のいずれか１項に記載の二色成形品の製造方法。 The method for manufacturing a two-color molded product according to any one of claims 1 to 3 , wherein the two-color molded product is a duct quarter vent of an automobile.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003267040A (en) 2002-03-13 2003-09-25 Toyoda Gosei Co Ltd Vehicular ventilator
JP2005125744A (en) 2004-08-06 2005-05-19 Ito Shizuo Method and apparatus for manufacturing connection part for fuel tank
JP2005161683A (en) 2003-12-02 2005-06-23 Toyoda Gosei Co Ltd In-mold coated molded product, its manufacturing method and mold for in-mold coating molding
JP2010105253A (en) 2008-10-29 2010-05-13 Nissha Printing Co Ltd Injection molding mold and method for producing resin molding using the mold
JP2018065288A (en) 2016-10-19 2018-04-26 株式会社イノアックコーポレーション Manufacturing method of vent duct and molding die

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003267040A (en) 2002-03-13 2003-09-25 Toyoda Gosei Co Ltd Vehicular ventilator
JP2005161683A (en) 2003-12-02 2005-06-23 Toyoda Gosei Co Ltd In-mold coated molded product, its manufacturing method and mold for in-mold coating molding
JP2005125744A (en) 2004-08-06 2005-05-19 Ito Shizuo Method and apparatus for manufacturing connection part for fuel tank
JP2010105253A (en) 2008-10-29 2010-05-13 Nissha Printing Co Ltd Injection molding mold and method for producing resin molding using the mold
JP2018065288A (en) 2016-10-19 2018-04-26 株式会社イノアックコーポレーション Manufacturing method of vent duct and molding die

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