JP2009226828A - Taking-out method of injection-molded product, and apparatus for the same - Google Patents

Taking-out method of injection-molded product, and apparatus for the same Download PDF

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JP2009226828A
JP2009226828A JP2008077234A JP2008077234A JP2009226828A JP 2009226828 A JP2009226828 A JP 2009226828A JP 2008077234 A JP2008077234 A JP 2008077234A JP 2008077234 A JP2008077234 A JP 2008077234A JP 2009226828 A JP2009226828 A JP 2009226828A
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mold
molded product
main body
undercut portion
core
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Kyozo Yamamoto
恭三 山本
Chiaki Asano
千明 朝野
Masahiro Yamakawa
昌宏 山川
Teppei Watanabe
哲平 渡邉
Kazuhiro Furuta
和広 古田
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Mazda Motor Corp
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Mazda Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress defects of lowering in rigidity of a mold or production of burrs by avoiding formation of a relatively large space inside a core mold, when injection-molding a molded product having a curved body protruding toward the front surface side and an undercut part bent toward the rear face side of the body at the edge part of the body and taking it out from the mold. <P>SOLUTION: In a taking-out method, a first mold molding the surface of the molded product body, a second mold molding the rear face of the molded product body and the inner face of the undercut part continued to the rear face, and a third mold molding the outer face and the end face of the undercut part continued to the surface of the molded product body, are used to inject resin into a cavity formed by these molds, and then the first mold is separated from the second and third molds and opened, the third mold is moved to the outside of the second mold and the undercut part of the molded product is displaced to the outside of the second mold via the end face, and gas is supplied to a gas passage passing through the inside of the second mold and leading to the cavity forming face of the second mold to release the molded product from the second and third molds. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、射出成形品の取出し方法及びその装置、より詳しくは、本体の縁部にアンダーカット部を有する射出成形品の型からの取出し方法及びその装置に関し、樹脂の射出成形の技術分野に属する。   The present invention relates to a method and apparatus for taking out an injection-molded product, and more particularly, to a method and apparatus for taking out an injection-molded product having an undercut portion at the edge of a main body, and relates to the technical field of resin injection molding. Belongs.

一般に、樹脂の射出成形においては、型締めしたキャビティ型とコア型とで形成されるキャビティに溶融状態の樹脂を射出し、樹脂がある程度冷却固化した段階で型開きし、コア型に残った射出成形品を例えば自重による落下であるいはロボットアーム等を用いて型から取り出すのであるが、この最後の成形品の取出しを円滑化するものとして、コア型のキャビティ形成面からピンを突出させて成形品をコア型から離型させるためのエジェクト機構がコア型の内部に備えられる。   In general, in resin injection molding, molten resin is injected into a cavity formed by a cavity mold and a core mold that are clamped, and the mold is opened after the resin has cooled and solidified to some extent, and the injection remaining in the core mold. The molded product is removed from the mold by dropping due to its own weight or using a robot arm or the like. To facilitate the removal of this last molded product, the molded product is made by projecting a pin from the cavity forming surface of the core mold. An eject mechanism for releasing the mold from the core mold is provided inside the core mold.

しかし、その結果、コア型の内部にエジェクト機構を収容するための比較的大きな空間が必要となり、型剛性が低下して、樹脂射出後で型開きまでの保圧期間中に型同士の合わせ面が緩んでバリが発生する不具合が生じる。   However, as a result, a relatively large space for accommodating the ejection mechanism is required inside the core mold, the mold rigidity is reduced, and the mating surfaces of the molds are held during the pressure holding period from resin injection to mold opening. This causes a problem that burrs occur due to loosening.

この問題に対しては、特許文献１や特許文献２に記載されているように、エジェクト機構に代えて、加圧気体を用いて成形品をコア型から離型させる技術を採用することが考えられる。例えば、特許文献１には、コア型の内部を通過してコア型のキャビティ形成面に至って開口する気体通路を設け、型開き後に、前記気体通路に加圧気体を供給して成形品の裏面側に加圧気体を噴出させつつ、さらにエジェクト機構で成形品をコア型から離型させる技術が記載されている。同様に、特許文献２にも、射出成形した成形品の裏面側に加圧気体を噴出させることで、成形品を型から離型させる技術が記載されている。これらの技術によれば、コア型の内部に比較的細い気体通路を設けるだけなので、型剛性低下ないしバリ発生の不具合が抑制される。   In order to solve this problem, as described in Patent Document 1 and Patent Document 2, it is considered to employ a technique for releasing the molded product from the core mold using a pressurized gas instead of the eject mechanism. It is done. For example, Patent Document 1 provides a gas passage that passes through the inside of the core mold and opens to the cavity forming surface of the core mold, and after the mold is opened, pressurized gas is supplied to the gas passage to back the molded product. A technique is described in which a molded product is released from a core mold by an eject mechanism while jetting pressurized gas to the side. Similarly, Patent Document 2 also describes a technique for releasing a molded product from a mold by ejecting a pressurized gas to the back side of the injection molded molded product. According to these techniques, since only a relatively thin gas passage is provided inside the core mold, the mold rigidity is reduced and the occurrence of burrs is suppressed.

特開２００３−３２０５６３（段落００１８）JP2003-320563 (paragraph 0018) 特許第３４６９６４７号（段落００２３）Japanese Patent No. 3469647 (paragraph 0023)

ところで、従来、車両のバンパーのように、本体の形状が表面側に突出して湾曲する形状であり、この本体の縁部に本体の裏面側に曲折する取付フランジ等のアンダーカット部が設けられた構成の成形品を射出成形する場合は、図１４に示すように、成形品の本体ｒの表面を成形するキャビティ型ａと、成形品の本体ｒの裏面の一部を成形するコア型ｂと、このコア型ｂの内部に備えられて、成形品の本体ｒの裏面の残部、この裏面の残部と連続するアンダーカット部ｕの内面及びアンダーカット部ｕの端面を成形するスライドコアｃとを用い、これらの型ａ，ｂ，ｃを集合させて形成されるキャビティに溶融状態の樹脂を射出した後、キャビティ型ａを矢印（i）のように移動させて型開きし、この型開きの後、スライドコアｃを矢印（ii）のようにコア型ｂの内方へ移動させることにより、スライドコアｃとアンダーカット部ｕとの干渉を回避し、その後、成形品を矢印（iii）のように移動させてコア型ｂから取り出すのが通例であるが、この場合も、コア型ｂの内部にスライドコアｃやその移動機構を収容するための比較的大きな空間が必要となり、型剛性低下ないしバリ発生の不具合が生じる。   By the way, conventionally, like the bumper of a vehicle, the shape of the main body is a shape that protrudes and curves to the front surface side, and an undercut portion such as a mounting flange that bends to the back side of the main body is provided at the edge of the main body. In the case of injection molding of a molded product having a configuration, as shown in FIG. 14, a cavity mold a that molds the surface of the main body r of the molded product, and a core mold b that molds a part of the back surface of the main body r of the molded product. A slide core c provided inside the core mold b and forming the remaining part of the back surface of the main body r of the molded product, the inner surface of the undercut part u continuous with the remaining part of the back surface, and the end surface of the undercut part u. The molten resin is injected into a cavity formed by assembling these molds a, b, and c, and then the cavity mold a is moved as indicated by an arrow (i) to open the mold. After that, slide core c is moved to arrow (ii) Thus, by moving inward of the core mold b, interference between the slide core c and the undercut portion u is avoided, and then the molded product is moved as shown by an arrow (iii) and taken out from the core mold b. However, in this case as well, a relatively large space for accommodating the slide core c and its moving mechanism is required inside the core mold b, resulting in a decrease in mold rigidity and a problem of occurrence of burrs.

本発明は、表面側に突出して湾曲する形状の本体と、この本体の縁部で本体の裏面側に曲折するアンダーカット部とを有する成形品を射出成形する場合における前記のような問題に対処するもので、コア型の内部に比較的大きな空間を設けることなく、確実にコア型とアンダーカット部との干渉を回避し、その結果、型剛性低下ないしバリ発生の不具合を抑制しつつ、円滑に成形品をコア型から取り出すことの可能な射出成形品の取出し方法及びその装置を提供することを課題とする。   The present invention addresses the above-described problems in the case of injection molding a molded product having a main body that is curved to protrude to the front surface side, and an undercut portion that bends to the back side of the main body at the edge of the main body. Therefore, without providing a relatively large space inside the core mold, it is possible to reliably avoid interference between the core mold and the undercut portion, and as a result, smoothness while suppressing deterioration of mold rigidity or occurrence of burrs. It is another object of the present invention to provide a method and an apparatus for taking out an injection-molded product capable of taking out the molded product from the core mold.

前記課題を解決するため、本発明では次のような手段を用いる。   In order to solve the above problems, the present invention uses the following means.

まず、本願の請求項１に記載の発明は、表面側に突出して湾曲する形状の本体と、この本体の縁部で本体の裏面側に曲折するアンダーカット部とを有し、アンダーカット部の端面が成形品の内方を指向している射出成形品を型から取り出す方法であって、前記成形品の本体の表面を成形する第１の型と、前記本体の裏面及びこの裏面と連続する前記アンダーカット部の内面を成形する第２の型と、前記本体の表面と連続する前記アンダーカット部の外面及び前記アンダーカット部の端面を成形する第３の型とを用い、これらの型を集合させて形成されるキャビティに溶融状態の樹脂を射出した後、第１の型を第２の型及び第３の型から離反させる型開き工程、第１の型の離反の後、前記第３の型を第２の型の外方へ移動させることにより、成形品のアンダーカット部を前記端面を介して第２の型の外へ変位させる変位工程、及び、第２の型の内部を通過して第２の型のキャビティ形成面に至る気体通路に気体を供給することにより、成形品を第２の型及び第３の型から離型させる離型工程を実行することを特徴とする。   First, the invention described in claim 1 of the present application includes a main body that is curved to protrude to the front surface side, and an undercut portion that bends to the back side of the main body at the edge of the main body. A method of taking out an injection molded product having an end face directed inward of the molded product from the mold, the first mold for molding the surface of the main body of the molded product, the back surface of the main body and the back surface of the main body. Using a second mold that molds the inner surface of the undercut portion, and a third mold that molds the outer surface of the undercut portion and the end surface of the undercut portion that are continuous with the surface of the main body, After injecting molten resin into a cavity formed by the assembly, a mold opening step for separating the first mold from the second mold and the third mold, and after the separation of the first mold, the third mold By moving the mold from the second mold outward, A displacement step of displacing the undercut portion of the product through the end face to the outside of the second mold, and a gas passage through the interior of the second mold to the cavity forming surface of the second mold It is characterized by performing a mold release step of releasing the molded product from the second mold and the third mold by supplying.

また、本願の請求項２に記載の発明は、前記請求項１に記載の射出成形品の取出し方法において、離型工程における気体通路への気体の供給を変位工程の前に開始することを特徴とする。   The invention according to claim 2 of the present application is characterized in that, in the method of taking out an injection molded product according to claim 1, the supply of gas to the gas passage in the mold release step is started before the displacement step. And

また、本願の請求項３に記載の発明は、前記請求項１又は２に記載の射出成形品の取出し方法において、離型工程により離型した成形品を取り出す取出し工程が設けられ、この取出し工程では気体通路への気体の供給を続けながら成形品を取り出すことを特徴とする。   The invention according to claim 3 of the present application is the method for taking out an injection-molded product according to claim 1 or 2, further comprising a take-out step for taking out the molded product released by the release step. Then, the molded product is taken out while continuing to supply the gas to the gas passage.

また、本願の請求項４に記載の発明は、前記請求項１から３のいずれか１項に記載の射出成形品の取出し方法において、成形品は車両のバンパーであることを特徴とする。   The invention according to claim 4 of the present application is characterized in that, in the method for taking out an injection molded product according to any one of claims 1 to 3, the molded product is a bumper of a vehicle.

また、本願の請求項５に記載の発明は、表面側に突出して湾曲する形状の本体と、この本体の縁部で本体の裏面側に曲折するアンダーカット部とを有し、アンダーカット部の端面が成形品の内方を指向している射出成形品を型から取り出す装置であって、前記成形品の本体の表面を成形する第１の型と、前記本体の裏面及びこの裏面と連続する前記アンダーカット部の内面を成形する第２の型と、前記本体の表面と連続する前記アンダーカット部の外面及び前記アンダーカット部の端面を成形する第３の型とを備え、第２の型の内部を通過して第２の型のキャビティ形成面に至る気体通路が設けられていると共に、これらの型を集合させて形成されるキャビティに溶融状態の樹脂を射出した後、第１の型を第２の型及び第３の型から離反させる型開き手段、第１の型の離反の後、前記第３の型を第２の型の外方へ移動させることにより、成形品のアンダーカット部を前記端面を介して第２の型の外へ変位させる変位手段、及び、前記気体通路に気体を供給することにより、成形品を第２の型及び第３の型から離型させる離型手段を有することを特徴とする。   Further, the invention according to claim 5 of the present application has a main body having a shape that protrudes and curves toward the front surface side, and an undercut portion that bends to the back surface side of the main body at an edge portion of the main body. An apparatus for taking out an injection molded product having an end face directed inward of the molded product from the mold, the first mold for molding the surface of the main body of the molded product, the back surface of the main body and the back surface of the main body. A second mold that molds the inner surface of the undercut portion; and a third mold that molds the outer surface of the undercut portion and the end surface of the undercut portion that are continuous with the surface of the main body. A gas passage is provided that passes through the interior of the mold and reaches the cavity forming surface of the second mold, and after the molten resin is injected into the cavity formed by collecting these molds, the first mold Move away from the second and third molds After the mold opening means and the first mold are separated, the third mold is moved to the outside of the second mold, so that the undercut portion of the molded product is removed from the second mold through the end face. Displacement means for displacing and a release means for releasing the molded product from the second mold and the third mold by supplying gas to the gas passage.

まず、請求項１、請求項５に記載の発明によれば、表面側に突出して湾曲する形状の本体と、この本体の縁部で本体の裏面側に曲折するアンダーカット部とを有する射出成形品を型から取り出す場合において、成形品の本体の表面を成形する第１の型と、成形品の本体の裏面及びこの裏面と連続するアンダーカット部の内面を成形する第２の型と、成形品の本体の表面と連続するアンダーカット部の外面及びアンダーカット部の端面を成形する第３の型とを用い、第１の型を型開きした後、第３の型を第２の型の外方へ移動させることにより、成形品のアンダーカット部を該アンダーカット部の端面を介して第２の型の外へ変位させ、これにより、第２の型とアンダーカット部との干渉を回避するようにしたから、第２の型の内部に第３の型やその移動機構を収容せずに済み、したがって第２の型の内部に比較的大きな空間を設ける必要がなくなり、型剛性低下ないしバリ発生の不具合が抑制されることとなる。   First, according to invention of Claim 1, Claim 5, it has injection molding which has the main body of the shape which protrudes and curves in the surface side, and the undercut part which bends in the back surface side of a main body at the edge of this main body When removing the product from the mold, a first mold for molding the surface of the main body of the molded product, a second mold for molding the back surface of the main body of the molded product and the inner surface of the undercut portion continuous with the back surface, and molding A third die that molds the outer surface of the undercut portion and the end surface of the undercut portion that are continuous with the surface of the main body of the product, and after opening the first die, the third die is the second die By moving outward, the undercut part of the molded product is displaced outside the second mold via the end face of the undercut part, thereby avoiding interference between the second mold and the undercut part. So that the third mold inside the second mold The moving mechanism requires without accommodation, thus there is no need to provide a relatively large space inside the second mold, so that the defect types reduction in rigidity or burrs can be suppressed.

また、確実に第２の型とアンダーカット部との干渉が回避されるから、円滑に成形品を第２の型及び第３の型から取り出すことが可能となる。   In addition, since the interference between the second mold and the undercut portion is reliably avoided, the molded product can be smoothly taken out from the second mold and the third mold.

さらに、第２の型の内部を通過して第２の型のキャビティ形成面に至る気体通路に気体を供給することにより、成形品を第２の型及び第３の型から離型させるようにしたから、第２の型の内部には比較的細い気体通路を設けるだけで済み、第２の型の内部に比較的大きな空間を設ける必要がなくなり、この点においても、型剛性低下ないしバリ発生の不具合が抑制されることとなる。   Furthermore, the molded product is released from the second mold and the third mold by supplying gas to a gas passage that passes through the inside of the second mold and reaches the cavity forming surface of the second mold. Therefore, it is only necessary to provide a relatively narrow gas passage in the second mold, and it is not necessary to provide a relatively large space in the second mold. Will be suppressed.

次に、請求項２に記載の発明によれば、成形品を離型させるための気体通路への気体の供給を、成形品のアンダーカット部を第２の型の外へ変位させるよりも前から行うようにしたので、前記気体の供給を前記変位の後に開始する場合に比べて、成形品を早い時期に型から取り出すことができ、成形サイクルが短縮されて、生産性の向上が図られることとなる。   Next, according to the invention described in claim 2, the gas supply to the gas passage for releasing the molded product is performed before the undercut portion of the molded product is displaced out of the second mold. As compared with the case where the gas supply is started after the displacement, the molded product can be taken out from the mold at an earlier time, the molding cycle is shortened, and the productivity is improved. It will be.

つまり、この請求項２に記載の発明は、成形品の離型のために気体等の流体を用いる場合は、エジェクト機構を用いる場合に比べて、応答性が低下し、気体通路への気体の供給を開始してから成形品が離型するまでに所定の時間がかかることに着目したもので、成形品の離型のための気体通路への気体の供給を、成形品のアンダーカット部を第２の型の外へ変位させるよりも前から行うことにより、成形品の離型をアンダーカット部の変位と同時あるいはアンダーカット部の変位の直後とすることが可能となる。   That is, in the invention according to claim 2, when a fluid such as a gas is used for releasing a molded product, the responsiveness is lowered as compared with the case where an eject mechanism is used. Focusing on the fact that it takes a certain amount of time from the start of supply until the molded product is released. Supply the gas to the gas passage for releasing the molded product, By performing from before the second die is displaced, it is possible to release the molded product simultaneously with the displacement of the undercut portion or immediately after the displacement of the undercut portion.

次に、請求項３に記載の発明によれば、離型した成形品を例えばロボットアーム等を用いて取り出す場合に、成形品の離型のための気体供給を続けながら成形品を取り出すようにしたので、成形品を型から引き離すときに、成形品の裏面と型のキャビティ形成面との間に発生する負圧を低減することができ、成形品に無理な力を作用させることなく円滑に短時間で成形品を型から取り出すことが可能となる。   Next, according to the third aspect of the present invention, when the molded product that has been released is taken out using, for example, a robot arm, the molded product is taken out while gas supply for releasing the molded product is continued. As a result, when the molded product is pulled away from the mold, the negative pressure generated between the back surface of the molded product and the cavity forming surface of the mold can be reduced, and it can be smoothly performed without applying excessive force to the molded product. The molded product can be removed from the mold in a short time.

特に、成形品の本体の形状が表面側に突出して湾曲する形状である場合は、例えば成形品の本体の形状が平坦な形状である場合に比べて、一般に、成形品の裏面と型のキャビティ形成面との間に発生する負圧が自然に解消されるには長い時間がかかるものである。この請求項３に記載の発明によれば、そのような場合でも、無理なく円滑に短時間で成形品を型から取り出すことが可能となるのである。   In particular, when the shape of the main body of the molded product is a shape that protrudes and curves to the front side, for example, compared with the case where the shape of the main body of the molded product is a flat shape, in general, the back surface of the molded product and the cavity of the mold It takes a long time for the negative pressure generated between the forming surface and the surface to be naturally eliminated. According to the third aspect of the invention, even in such a case, the molded product can be taken out of the mold smoothly and smoothly in a short time.

そして、請求項４に記載の発明によれば、車両のバンパーが、型剛性低下ないしバリ発生の不具合が抑制されながら、成形サイクルが短縮されながら、円滑に短時間で型から取り出されて、生産されることとなる。以下、発明の最良の実施の形態を通して本発明をさらに詳しく説述する。   According to the invention of claim 4, the bumper of the vehicle is smoothly removed from the mold in a short time while the molding cycle is shortened while the mold rigidity is reduced or the burr generation is suppressed. Will be. Hereinafter, the present invention will be described in more detail through the best mode of the invention.

図１は、本実施形態に係る射出成形品１の側面図、図２は、図１のII−II線による部分断面図である。   FIG. 1 is a side view of an injection molded product 1 according to this embodiment, and FIG. 2 is a partial cross-sectional view taken along line II-II in FIG.

本実施形態において、射出成形品１は、車両のバンパー、特にフロントバンパーである。   In the present embodiment, the injection molded product 1 is a vehicle bumper, particularly a front bumper.

図２に拡大図示したように、射出成形品１は、表面１ａ側に突出して湾曲する形状の本体１Ａと、この本体１Ａの縁部で本体１Ａの裏面１ｂ側に曲折するアンダーカット部１Ｂとを有し、アンダーカット部１Ｂの端面１ｅが成形品１の内方を指向している。   As shown in an enlarged view in FIG. 2, the injection-molded product 1 includes a main body 1A having a shape that protrudes and curves toward the surface 1a side, and an undercut portion 1B that bends toward the back surface 1b side of the main body 1A at the edge of the main body 1A. The end face 1e of the undercut portion 1B is oriented inward of the molded product 1.

成形品本体１Ａの表面１ａは、アンダーカット部１Ｂの外面１ｃに連続し、さらにアンダーカット部１Ｂの端面１ｅに連続している。一方、成形品本体１Ａの裏面１ｂは、アンダーカット部１Ｂの内面１ｄに連続し、さらにアンダーカット部１Ｂの端面１ｅに連続している。   The surface 1a of the molded product main body 1A is continuous with the outer surface 1c of the undercut portion 1B, and is further continuous with the end surface 1e of the undercut portion 1B. On the other hand, the back surface 1b of the molded product body 1A is continuous with the inner surface 1d of the undercut portion 1B, and is further continuous with the end surface 1e of the undercut portion 1B.

図３は、本実施形態において、このような構造の成形品１を射出成形して型から取り出すための装置１０の部分断面図である。   FIG. 3 is a partial cross-sectional view of an apparatus 10 for injection-molding the molded article 1 having such a structure and taking it out of the mold in the present embodiment.

この取出し装置１０は、成形型として、成形品本体１Ａの表面１ａを成形するキャビティ型１１と、成形品本体１Ａの裏面１ｂ及びこの裏面１ｂと連続するアンダーカット部１Ｂの内面１ｄを成形するコア型１２と、成形品本体１Ａの表面１ａと連続するアンダーカット部１Ｂの外面１ｃ及びアンダーカット部１Ｂの端面１ｅを成形する外捲りコア１３とを備えている。   The take-out device 10 includes a cavity mold 11 that molds the surface 1a of the molded product body 1A, a core that molds the back surface 1b of the molded product body 1A and the inner surface 1d of the undercut portion 1B that is continuous with the back surface 1b. The mold 12 includes an outer surface 1c of the undercut portion 1B continuous with the surface 1a of the molded product main body 1A and an outer core 13 for molding the end surface 1e of the undercut portion 1B.

コア型１２の内部には、コア型１２の内部を通過してコア型１２のキャビティ形成面１２ａ（図６参照）に至り、開口５６（図６参照）に接続する気体通路５１が設けられている。   Inside the core mold 12, there is provided a gas passage 51 that passes through the core mold 12 to reach the cavity forming surface 12 a (see FIG. 6) of the core mold 12 and is connected to the opening 56 (see FIG. 6). Yes.

外捲りコア１３は、コア型１２の下部で、コア型１２の内方（図３において右方）と外方（同、左方）とに水平に移動自在に設けられている。そして、外捲りコア１３をロッド４０ａを介してそのように移動させるための外捲りコア駆動シリンダ４０がコア型１２の外部に備えられている。   The outer core 13 is provided below the core die 12 so as to be movable horizontally inwardly (to the right in FIG. 3) and outwardly (to the left in FIG. 3). An outer core driving cylinder 40 for moving the outer core 13 through the rod 40 a is provided outside the core mold 12.

ここで、図３は、外捲りコア１３がコア型１２の最も内方に移動した状態を示している。型締め時には、外捲りコア１３は、このように最も内方に移動し、その窪んだキャビティ形成面１３ａ（図１１参照）は、相互に集合したキャビティ型１１のキャビティ形成面１１ａ（図８参照）及びコア型１２のキャビティ形成面１２ａ（図１１参照）とでキャビティ１４を画成する。   Here, FIG. 3 shows a state in which the outer turning core 13 has moved inwardly of the core mold 12. At the time of clamping, the outer core 13 moves inward most in this way, and the hollow cavity forming surface 13a (see FIG. 11) is the cavity forming surface 11a of the cavity mold 11 assembled together (see FIG. 8). ) And the cavity forming surface 12a (see FIG. 11) of the core mold 12 define a cavity.

図４に示すように、この取出し装置１０は、前記成形型１１〜１３及び外捲りコア駆動シリンダ４０の他、射出機２０、キャビティ型駆動装置３０、加圧エア供給装置５０、及び取出しロボットアーム６０を備えている。   As shown in FIG. 4, the take-out device 10 includes an injection machine 20, a cavity-type drive device 30, a pressurized air supply device 50, and a take-out robot arm in addition to the molds 11 to 13 and the outer core drive cylinder 40. 60.

射出機２０は、成形型１１〜１３が集合して形成されるキャビティ１４（図３参照）に溶融状態の樹脂Ｒ（図３参照）を射出するためのものである（射出手段）。   The injection machine 20 is for injecting a molten resin R (see FIG. 3) into a cavity 14 (see FIG. 3) formed by collecting the molds 11 to 13 (injection means).

キャビティ型駆動装置３０は、例えば油圧装置等で構成され、キャビティ１４に射出された樹脂Ｒがある程度冷却固化した段階でキャビティ型１１をコア型１２及び外捲りコア１３から離反させて型開きするためのものである（型開き手段）。   The cavity type driving device 30 is constituted by, for example, a hydraulic device or the like, and opens the mold by separating the cavity die 11 from the core die 12 and the outer facing core 13 when the resin R injected into the cavity 14 is cooled and solidified to some extent. (Mold opening means).

外捲りコア駆動シリンダ４０は、型開き後に、外捲りコア１３をコア型１２の外方へ移動させることにより、成形品１のアンダーカット部１Ｂをアンダーカット部１Ｂの端面１ｅ及び外捲りコア１３のキャビティ形成面１３ａの窪みを介してコア型１２の外へ変位させるためのものである（変位手段）。   The outer turning core drive cylinder 40 moves the outer turning core 13 to the outside of the core mold 12 after the mold is opened, thereby changing the undercut portion 1B of the molded product 1 to the end face 1e of the undercut portion 1B and the outer turning core 13. It is for displacing out of the core type | mold 12 through the hollow of the cavity formation surface 13a (displacement means).

加圧エア供給装置５０は、前記気体通路５１に加圧エアを供給することにより、成形品１の裏面１ｂ側に開口５６（図６参照）から加圧エアを噴出させて、成形品１の裏面１ｂとコア型１２のキャビティ形成面１２ａとの間に加圧エアを供給して、成形品１をコア型１２及び外捲りコア１３から離型させるためのものである（離型手段）。   The pressurized air supply device 50 supplies pressurized air to the gas passage 51, thereby ejecting pressurized air from the opening 56 (see FIG. 6) toward the back surface 1 b of the molded product 1. Pressurized air is supplied between the back surface 1b and the cavity forming surface 12a of the core mold 12 to release the molded product 1 from the core mold 12 and the outer core 13 (mold release means).

取出しロボットアーム６０は、離型した成形品１をコア型１２及び外捲りコア１３から引き離して、当該取出し装置１０外へ取り出すためのものである（取出し手段）。   The take-out robot arm 60 is for pulling the released molded product 1 away from the core mold 12 and the outer facing core 13 and taking it out of the take-out device 10 (take-out means).

そして、これらの機器２０〜６０に制御信号を出力して、当該取出し装置１０の全体の動作を統括管理する制御ユニット７０が備えられている。   And the control unit 70 which outputs a control signal to these apparatuses 20-60, and manages the whole operation | movement of the said taking-out apparatus 10 is provided.

ここで、コア型１２のキャビティ形成面１２ａに形成された開口５６の周辺構造を説明する。   Here, the peripheral structure of the opening 56 formed in the cavity forming surface 12a of the core mold 12 will be described.

図５、図６に示すように、コア型１２のキャビティ形成面１２ａには、漏斗状に開口５６が形成されており、この開口５６に嵌合密着して開口５６を閉じる蓋部材５２が備えられている。蓋部材５２は上下に延びる支持部材５３の上端部に連結されており、支持部材５３及び蓋部材５２はバネ５４により下方、つまり開口５６を閉じる方向へ常に付勢されている。   As shown in FIGS. 5 and 6, the cavity forming surface 12 a of the core mold 12 has a funnel-shaped opening 56, and a lid member 52 that fits and closes the opening 56 and closes the opening 56 is provided. It has been. The lid member 52 is connected to an upper end portion of a support member 53 extending vertically, and the support member 53 and the lid member 52 are always urged downward by a spring 54, that is, in a direction to close the opening 56.

支持部材５３の下端部はエア室５５に露出しており、このエア室５５に前記気体通路５１が接続している。   The lower end portion of the support member 53 is exposed to the air chamber 55, and the gas passage 51 is connected to the air chamber 55.

コア型１２のキャビティ形成面１２ａが湾曲しているため、キャビティ形成面１２ａと、開口５６を閉じた状態の蓋部材５２の上面とが面一の関係を維持するように、支持部材５３の回り止めピン５７が設けられている。   Since the cavity forming surface 12a of the core mold 12 is curved, the cavity forming surface 12a and the upper surface of the lid member 52 with the opening 56 closed maintain a flush relationship around the support member 53. A stop pin 57 is provided.

気体通路５１に加圧エアが供給されていないときは、図５に示したように、蓋部材５２は、バネ５４の付勢力によって下降し、開口５６を閉じている。そして、型締め時にはこの状態とされ、キャビティ型１１のキャビティ形成面１１ａと、コア型１２のキャビティ形成面１２ａと、外捲りコア１３の窪んだキャビティ形成面１３ａ（図１１参照）とで画成されるキャビティ１４に溶融状態の樹脂Ｒが射出される。   When pressurized air is not supplied to the gas passage 51, the lid member 52 is lowered by the urging force of the spring 54 and closes the opening 56, as shown in FIG. 5. This state is set when the mold is clamped, and is defined by the cavity forming surface 11a of the cavity mold 11, the cavity forming surface 12a of the core mold 12, and the cavity forming surface 13a (see FIG. 11) where the outer core 13 is recessed. The molten resin R is injected into the cavity 14 to be formed.

一方、成形品１を離型させる際には、気体通路５１への加圧エアの供給が開始される。すると、エア室５５内の圧力が次第に上昇し、ついには、図６に示したように、蓋部材５２が上方へ押し上げられて、成形品１の裏面１ｂをコア型１２のキャビティ形成面１２ａから持ち上げる。ただし、蓋部材５２が成形品１を持ち上げる範囲は、蓋部材５２が成形品１に当接する部分の周辺に限られる。   On the other hand, when releasing the molded product 1, supply of pressurized air to the gas passage 51 is started. Then, the pressure in the air chamber 55 gradually increases, and finally, as shown in FIG. 6, the lid member 52 is pushed upward, and the back surface 1b of the molded product 1 is moved from the cavity forming surface 12a of the core mold 12. lift. However, the range in which the lid member 52 lifts the molded product 1 is limited to the periphery of the portion where the lid member 52 contacts the molded product 1.

いったん蓋部材５２が上方へ押し上げられると、蓋部材５２と開口５６との間に隙間が生じ、ここから加圧エアが噴出する。噴出した加圧エアは成形品１の裏面１ｂに衝突し、成形品１の裏面１ｂとコア型１２のキャビティ形成面１２ａとの間に流入していき、成形品１をコア型１２から剥がして浮かしていく。つまり、成形品１がコア型１２及び外捲りコア１３から離型することとなる。   Once the lid member 52 is pushed upward, a gap is formed between the lid member 52 and the opening 56, and pressurized air is ejected therefrom. The jetted pressurized air collides with the back surface 1b of the molded product 1 and flows between the back surface 1b of the molded product 1 and the cavity forming surface 12a of the core mold 12 to peel the molded product 1 from the core mold 12. It floats. That is, the molded product 1 is released from the core mold 12 and the outer core 13.

次に、図７のタイムチャートを参照しながら、この取出し装置１０による成形品１の取出し動作を説明する（第１の実施形態）。   Next, with reference to the time chart of FIG. 7, the operation of taking out the molded product 1 by the take-out device 10 will be described (first embodiment).

まず、成形型１１〜１３は型締めされている。つまり、図３に示したように、キャビティ型１１は下降してコア型１２に近接し、外捲りコア１３はコア型１２の最も内方に移動して、これらの集合した成形型１１〜１３でキャビティ１４が形成されている。   First, the molds 11 to 13 are clamped. That is, as shown in FIG. 3, the cavity mold 11 descends and approaches the core mold 12, and the outer core 13 moves inwardly of the core mold 12, and these assembled molds 11 to 13 are assembled. Thus, the cavity 14 is formed.

また、気体通路５１への加圧エアの供給は停止しており、取出しロボットアーム６０は当該取出し装置１０外の上方にあって待機している。   The supply of pressurized air to the gas passage 51 is stopped, and the take-out robot arm 60 is on the upper side outside the take-out device 10 and is on standby.

この状態で、時刻アに、射出機２０が溶融状態の樹脂Ｒをキャビティ１４に射出し始め、樹脂Ｒの充填を開始する（充填工程）。この樹脂Ｒの充填は保圧のため所定時間続き、時刻イに終了する。   In this state, at time A, the injector 20 starts to inject the molten resin R into the cavity 14 and starts filling the resin R (filling step). This filling of the resin R continues for a predetermined time for holding pressure, and ends at time a.

次いで、時刻イの直後の時刻カに、図８に示したように、キャビティ型駆動装置３０がキャビティ型１１を矢印（i）のように上昇させることにより、キャビティ型１１をコア型１２及び外捲りコア１３から離反させ、型開きする（型開き工程）。この型開き状態は比較的長い所定時間続き、時刻キに終了する。   Next, as shown in FIG. 8, the cavity mold driving device 30 raises the cavity mold 11 as indicated by an arrow (i) at a time immediately after the time a, so that the cavity mold 11 is removed from the core mold 12 and the outer mold 12. The mold is opened away from the twisted core 13 (mold opening process). This mold opening state lasts for a relatively long predetermined time and ends at the time key.

次いで、時刻カの直後の時刻サに、図９に示したように、外捲りコア駆動シリンダ４０が外捲りコア１３を矢印（ii）のようにコア型１２の外方へ移動させることにより、成形品１のアンダーカット部１Ｂをコア型１２の外へ変位（外捲り）させる（変位工程）。これにより、コア型１２とアンダーカット部１Ｂとの干渉が回避される。この外捲りコア１３がコア型１２の外方へ移動した移動は所定時間続き、時刻キの直前の時刻シに終了する。   Next, as shown in FIG. 9, the outer core driving cylinder 40 moves the outer core 13 toward the outer side of the core mold 12 as indicated by an arrow (ii) at a time immediately after the time F. The undercut portion 1B of the molded product 1 is displaced (outer) from the core mold 12 (displacement process). Thereby, interference with the core type | mold 12 and the undercut part 1B is avoided. The movement of the outer core 13 moving outward from the core mold 12 continues for a predetermined time, and ends at the time just before the time key.

このとき、外捲りコア１３の窪んだキャビティ形成面１３ａが、成形品１の内方を指向しているアンダーカット部１Ｂの端面１ｅに引っ掛かって当接しているから、外捲りコア１３がコア型１２の外方へ移動することに伴い、成形品１のアンダーカット部１Ｂがコア型１２の外へ確実に引き摺り出されて変位することとなる。   At this time, since the cavity forming surface 13a in which the outer core 13 is recessed is caught by and contacted with the end surface 1e of the undercut portion 1B directed inward of the molded product 1, the outer core 13 is a core type. The undercut portion 1 </ b> B of the molded product 1 is reliably dragged out of the core mold 12 and displaced as it moves outward of 12.

次いで、時刻サの直後の時刻タに、加圧エア供給装置５０が加圧エアを気体通路５１に供給し始める。そして、これにより、図５、図６を参照して説明したように、所定時間後の時刻チに、成形品１がコア型１２及び外捲りコア１３から離型することとなる（離型工程）。この加圧エアの供給は所定時間続き、時刻シの直前の時刻ツに終了する。   Next, the pressurized air supply device 50 starts to supply pressurized air to the gas passage 51 at a time immediately after the time. As a result, as described with reference to FIGS. 5 and 6, the molded product 1 is released from the core mold 12 and the outer core 13 at a time h after a predetermined time (mold release step). ). This supply of pressurized air continues for a predetermined time and ends at a time just before the time.

次いで、時刻チの直後の時刻ナに、図１０に示したように、取出しロボットアーム６０が下降して、吸着盤６１…６１により、離型した成形品１を保持し、次いで、時刻ニに、図１１に示したように、取出しロボットアーム６０が矢印（iii）のように上昇して、保持した成形品１をコア型１２及び外捲りコア１３から引き離して、当該取出し装置１０外へ取り出すこととなる（取出し工程）。   Next, at time n immediately after time h, as shown in FIG. 10, the take-out robot arm 60 is lowered and the released molded product 1 is held by the suction plates 61... 61, and then at time d. As shown in FIG. 11, the take-out robot arm 60 moves up as indicated by an arrow (iii), and the held molded product 1 is pulled away from the core mold 12 and the outer core 13 and taken out of the take-out device 10. (Take out process).

そして、以降は、取出しロボットアーム６０の上昇の後、時刻ツに、加圧エアの供給が停止し、時刻シに、外捲りコア１３がコア型１２の最も内方に移動し、時刻キに、キャビティ型１１が下降して再び型締め状態となり、最初の状態に戻る。そして、次の成形サイクルが開始することとなる。   Thereafter, after the take-out robot arm 60 is raised, the supply of pressurized air is stopped at the time, and at the time of time, the outer core 13 is moved to the innermost side of the core mold 12 to reach the time key. Then, the cavity mold 11 is lowered and the mold is clamped again to return to the initial state. Then, the next molding cycle starts.

このように、本実施形態によれば、表面１ａ側に突出して湾曲する形状の本体１Ａと、この本体１Ａの縁部で本体１Ａの裏面１ｂ側に曲折するアンダーカット部１Ｂとを有する射出成形品１を型から取り出す場合において、成形品１の本体１Ａの表面１ａを成形すキャビティ型１１と、成形品１の本体１Ａの裏面１ｂ及びこの裏面１ｂと連続するアンダーカット部１Ｂの内面１ｄを成形するコア型１２と、成形品１の本体１Ａの表面１ａと連続するアンダーカット部１Ｂの外面１ｃ及びアンダーカット部１Ｂの端面１ｅを成形する外捲りコア１３とを用い、キャビティ型１１を型開きした後、外捲りコア１３をコア型１２の外方へ移動させることにより、成形品１のアンダーカット部１Ｂを該アンダーカット部１Ｂの端面１ｅを介してコア型１２の外へ変位させ、これにより、コア型１２とアンダーカット部１Ｂとの干渉を回避するようにしたから、コア型１２の内部に外捲りコア１３や駆動シリンダ４０を収容せずに済み、したがってコア型１２の内部に比較的大きな空間を設ける必要がなくなり、型剛性低下ないしバリ発生の不具合が抑制されることとなる。   Thus, according to the present embodiment, the injection molding includes the main body 1A that is curved to protrude toward the front surface 1a, and the undercut portion 1B that bends to the back surface 1b side of the main body 1A at the edge of the main body 1A. When the product 1 is taken out of the mold, the cavity mold 11 that molds the surface 1a of the main body 1A of the molded product 1, the back surface 1b of the main body 1A of the molded product 1, and the inner surface 1d of the undercut portion 1B that is continuous with the back surface 1b. Using the core mold 12 to be molded, the outer surface 1c of the undercut portion 1B continuous with the surface 1a of the main body 1A of the molded product 1 and the outer core 13 for molding the end surface 1e of the undercut portion 1B, the cavity mold 11 is molded. After the opening, the outer core 13 is moved to the outside of the core mold 12 so that the undercut portion 1B of the molded product 1 passes through the end face 1e of the undercut portion 1B. 2 so that the interference between the core mold 12 and the undercut portion 1B is avoided, so that it is not necessary to house the outer core 13 and the drive cylinder 40 inside the core mold 12. Therefore, it is not necessary to provide a relatively large space inside the core mold 12, and the mold rigidity is reduced or the occurrence of burrs is suppressed.

また、確実にコア型１２とアンダーカット部１Ｂとの干渉が回避されるから、円滑に成形品１をコア型１２及び外捲りコア１３から取り出すことが可能となる。   Further, since the interference between the core mold 12 and the undercut portion 1B is reliably avoided, the molded product 1 can be smoothly taken out from the core mold 12 and the outer core 13.

また、コア型１２の内部を通過してコア型１２のキャビティ形成面１２ａに至る気体通路５１に加圧エアを供給することにより、成形品１をコア型１２及び外捲りコア１３から離型させるようにしたから、コア型１２の内部には比較的細い気体通路５１を設けるだけで済み、コア型１２の内部に比較的大きな空間を設ける必要がなくなり、この点においても、型剛性低下ないしバリ発生の不具合が抑制されることとなる。   Further, by supplying pressurized air to the gas passage 51 that passes through the core mold 12 and reaches the cavity forming surface 12 a of the core mold 12, the molded product 1 is released from the core mold 12 and the outer core 13. As a result, it is only necessary to provide a relatively thin gas passage 51 inside the core mold 12, and it is not necessary to provide a relatively large space inside the core mold 12. The malfunction of generation | occurrence | production will be suppressed.

また、離型した成形品１をロボットアーム６０を用いて取り出す場合に、ロボットアーム６０が上昇し終わった時刻ニの後の時刻ツに、加圧エアの供給を停止し、これにより、成形品１の離型のための加圧エアの供給を続けながらロボットアーム６０で成形品１を取り出すようにしたので、図１１に示したように成形品１をコア型１２及び外捲りコア１３から引き離すときに、成形品１の裏面１ｂとコア型１２のキャビティ形成面１２ａとの間に発生する負圧を低減することができ、成形品１に無理な力を作用させることなく円滑に短時間で成形品１をコア型１２及び外捲りコア１３から取り出すことが可能となる。   Further, when the molded product 1 that has been released is taken out using the robot arm 60, the supply of pressurized air is stopped at a time after the time d when the robot arm 60 has finished being raised, and thereby the molded product Since the molded article 1 is taken out by the robot arm 60 while the supply of pressurized air for releasing the mold 1 is continued, the molded article 1 is pulled away from the core mold 12 and the outer core 13 as shown in FIG. Sometimes, the negative pressure generated between the back surface 1b of the molded product 1 and the cavity forming surface 12a of the core mold 12 can be reduced, and the molded product 1 can be smoothly and quickly applied without applying an excessive force. The molded product 1 can be taken out from the core mold 12 and the outer core 13.

特に、本実施形態では、成形品１が車両のバンパーであって、成形品１の本体１Ａの形状が表面１ａ側に突出して湾曲する形状であるので、例えば成形品の本体の形状が平坦な形状である場合に比べて、成形品の裏面と型のキャビティ形成面との間に発生する負圧が自然に解消されるには長い時間がかかるものである（図１１参照）。本実施形態では、そのような場合でも、無理なく円滑に短時間で成形品１を型から取り出すことが可能となるのである。   In particular, in this embodiment, the molded product 1 is a bumper of a vehicle, and the shape of the main body 1A of the molded product 1 is a shape that protrudes and curves toward the surface 1a. Compared to the case of the shape, it takes a long time for the negative pressure generated between the back surface of the molded product and the cavity forming surface of the mold to be resolved naturally (see FIG. 11). In this embodiment, even in such a case, the molded product 1 can be taken out of the mold smoothly and without difficulty.

そして、本実施形態では、車両のバンパーが、型剛性低下ないしバリ発生の不具合が抑制されながら、成形サイクルが短縮されながら、円滑に短時間でコア型１２及び外捲りコア１３から取り出されて、生産されることとなる。   And in this embodiment, the bumper of the vehicle is taken out from the core mold 12 and the outer turning core 13 smoothly in a short time while the molding cycle is shortened while the mold rigidity reduction or the occurrence of burr is suppressed. Will be produced.

次に、図１２のタイムチャートを参照しながら、この取出し装置１０による成形品１の別の取出し動作を説明する（第２の実施形態）。ただし、この第２の実施形態の特徴部分のみ説明し、先の実施形態と構成や作用が同じ部分は説明を省略する。   Next, another take-out operation of the molded product 1 by the take-out device 10 will be described with reference to the time chart of FIG. 12 (second embodiment). However, only the characteristic part of this 2nd Embodiment is demonstrated and description is abbreviate | omitted about the part with the same structure and effect | action as previous embodiment.

この第２の実施形態では、成形品１をコア型１２及び外捲りコア１３から離型させるための、気体通路５１への加圧エアの供給を、外捲りコア駆動シリンダ４０が外捲りコア１３をコア型１２の外方へ移動させるより前（換言すれば、成形品１のアンダーカット部１Ｂをコア型１２の外へ変位させるより前）に開始する点が特徴である。   In the second embodiment, the outer core driving cylinder 40 is used to supply pressurized air to the gas passage 51 for releasing the molded product 1 from the core mold 12 and the outer core 13. Is characterized in that it starts before moving the core mold 12 outward (in other words, before the undercut portion 1B of the molded product 1 is displaced out of the core mold 12).

すなわち、第１の実施形態では、図７において、加圧エア供給装置５０が加圧エアを気体通路５１に供給し始める時刻タは、外捲りコア駆動シリンダ４０が外捲りコア１３をコア型１２の外方へ移動させる時刻サよりも後であったのに対し、この第２の実施形態では、図１２において、前記時刻タは前記時刻サよりも前にある。   That is, in the first embodiment, in FIG. 7, at the time when the pressurized air supply device 50 starts to supply the pressurized air to the gas passage 51, the outer core driving cylinder 40 sets the outer core 13 to the core type 12. In the second embodiment, in FIG. 12, the time data is before the time time.

この結果、成形品１がコア型１２及び外捲りコア１３から離型する時刻チが早まり、以降の動作時刻ナ、ニ、ツ、シ、キがすべて早まって、第１の実施形態に比べて、成形品１を早い時期にコア型１２及び外捲りコア１３から取り出すことができ、成形サイクルが短縮されて、生産性の向上が図られることとなる。   As a result, the time h when the molded product 1 is released from the core mold 12 and the outer turning core 13 is advanced, and the subsequent operation times N, D, Tsu, Shi, and K are all advanced, compared with the first embodiment. The molded product 1 can be taken out from the core mold 12 and the outer core 13 at an early stage, the molding cycle is shortened, and the productivity is improved.

つまり、この第２の実施形態は、成形品１の離型のためにエア等の流体を用いる場合は、例えばエジェクト機構を用いる場合等に比べて、応答性が低下するので、その応答性低下を補うようにしたものである。   That is, in the second embodiment, when a fluid such as air is used for releasing the molded article 1, the responsiveness is reduced compared to, for example, the case where an eject mechanism is used. Is intended to compensate.

次に、図１３のタイムチャートを参照しながら、この取出し装置１０による成形品１のさらに別の取出し動作を説明する（第３の実施形態）。ただし、この第３の実施形態の特徴部分のみ説明し、先の実施形態と構成や作用が同じ部分は説明を省略する。   Next, still another take-out operation of the molded product 1 by the take-out device 10 will be described with reference to the time chart of FIG. 13 (third embodiment). However, only the characteristic part of this 3rd Embodiment is demonstrated and description is abbreviate | omitted about the part with the same structure and effect | action as previous embodiment.

この第３の実施形態も、第２の実施形態と同様、成形品１をコア型１２及び外捲りコア１３から離型させるための、気体通路５１への加圧エアの供給を、外捲りコア駆動シリンダ４０が外捲りコア１３をコア型１２の外方へ移動させるより前（換言すれば、成形品１のアンダーカット部１Ｂをコア型１２の外へ変位させるより前）に開始する点が特徴であるが、第２の実施形態に比べて、加圧エアの供給開始時刻タをさらに早めている。   In the third embodiment, as in the second embodiment, the supply of pressurized air to the gas passage 51 for releasing the molded product 1 from the core mold 12 and the outer core 13 is performed by using the outer core. The starting point is before the drive cylinder 40 moves the outer turning core 13 outward of the core mold 12 (in other words, before the undercut portion 1B of the molded product 1 is displaced out of the core mold 12). As a feature, the pressurized air supply start time t is further advanced as compared with the second embodiment.

図１３を参照すれば、加圧エアの供給開始時刻タは、型開き時刻カよりも前にあり、この結果、成形品１がコア型１２及び外捲りコア１３から離型する時刻チが、外捲りコア１３がコア型１２の外方へ移動する時刻サに一致している。つまり、第２の実施形態では、成形品１の離型がアンダーカット部１Ｂの変位の直後に行われるのに対し、この第３の実施形態では、成形品１の離型がアンダーカット部１Ｂの変位と同時に行われることとなる。   Referring to FIG. 13, the pressurized air supply start time t is before the mold opening time, and as a result, the time h when the molded product 1 is released from the core mold 12 and the outer core 13 is This coincides with the time when the outer core 13 moves outward of the core mold 12. That is, in the second embodiment, the release of the molded product 1 is performed immediately after the displacement of the undercut portion 1B, whereas in the third embodiment, the release of the molded product 1 is performed under the undercut portion 1B. It will be performed simultaneously with the displacement of.

この結果、成形品１がコア型１２及び外捲りコア１３から離型する時刻チがさらに早まり、以降の動作時刻ナ、ニ、ツ、シ、キもさらに早まって、第１、第２の実施形態に比べて、成形品１をより早い時期にコア型１２及び外捲りコア１３から取り出すことができ、成形サイクルがさらに短縮されて、より一層の生産性の向上が図られることとなる。   As a result, the time when the molded product 1 is released from the core mold 12 and the outer turning core 13 is further advanced, and the subsequent operation times N, D, Tsu, Shi, and Ki are further advanced, and the first and second implementations. Compared with the form, the molded product 1 can be taken out from the core mold 12 and the outer core 13 at an earlier time, the molding cycle is further shortened, and the productivity can be further improved.

なお、成形品１の離型がアンダーカット部１Ｂの変位より前に行われると、アンダーカット部１Ｂに無理な力がかかって成形品１が塑性変形する原因ともなるので、加圧エアの供給開始時刻タをこの第３の実施形態よりも早めることは好ましくない。   If release of the molded product 1 is performed before the displacement of the undercut portion 1B, an excessive force is applied to the undercut portion 1B to cause the molded product 1 to be plastically deformed. It is not preferable that the start time t be set earlier than that in the third embodiment.

また、ロボットアーム６０の下降時刻ナは、状況に応じてより早めることが可能である。   Further, the lowering time n of the robot arm 60 can be advanced according to the situation.

さらに、取出し装置１０全体を横に倒した状態にし、キャビティ型１１を水平方向に移動させて型開きした後、アンダーカット部１Ｂを外捲りし、成形品１をコア型１２及び外捲りコア１３から離型させれば、成形品１を自重による落下で取り出すこともできる。この場合は、ロボットアーム６０のような取出し手段を備える必要がなくなる。   Further, the entire take-out device 10 is laid down sideways, the cavity mold 11 is moved in the horizontal direction and the mold is opened, and then the undercut portion 1B is turned outward, and the molded product 1 is turned into the core mold 12 and the outer turned core 13. If the mold 1 is released from the mold, the molded product 1 can be taken out by dropping due to its own weight. In this case, it is not necessary to provide an extraction means such as the robot arm 60.

さらに、加圧エア供給装置５０の開口５６の周辺構造として、前述したような開口５６を開閉可能な蓋部材５２に代えて、加圧エアがキャビティ側に向けて通過可能で溶融状態の樹脂がキャビティ側から通過不能な微細通路を形成したブロック部材を開口５６に固定嵌合するようにしてもよい。   Further, as a peripheral structure of the opening 56 of the pressurized air supply device 50, instead of the lid member 52 capable of opening and closing the opening 56 as described above, pressurized air can pass toward the cavity side and a molten resin can be passed. A block member in which a fine passage that cannot pass from the cavity side may be fixedly fitted to the opening 56.

以上、具体例を挙げて詳しく説明したように、本発明は、表面側に突出して湾曲する形状の本体と、この本体の縁部で本体の裏面側に曲折するアンダーカット部とを有する成形品を射出成形する場合に、コア型の内部に比較的大きな空間を設けることなく、確実にコア型とアンダーカット部との干渉を回避し、その結果、型剛性低下ないしバリ発生の不具合を抑制しつつ、円滑に成形品をコア型から取り出すことが可能な技術であるから、樹脂の射出成形の技術分野において広範な産業上の利用可能性が期待される。   As described above in detail with reference to specific examples, the present invention is a molded product having a main body having a shape that protrudes and curves toward the front surface side, and an undercut portion that bends to the back side of the main body at the edge of the main body. When injection molding is performed, interference between the core mold and the undercut portion is surely avoided without providing a relatively large space inside the core mold. On the other hand, since the molded product can be smoothly taken out from the core mold, a wide range of industrial applicability is expected in the technical field of resin injection molding.

本発明の最良の実施形態に係る射出成形品を説明するための側面図である。It is a side view for demonstrating the injection molded product which concerns on the best embodiment of this invention. 図１のII−II線による射出成形品の部分断面図である。It is a fragmentary sectional view of the injection molded product by the II-II line of FIG. 本発明の最良の実施形態に係る射出成形品の取出し装置の部分断面図であって、型締め時を示すものである。It is a fragmentary sectional view of the injection molding product taking-out device concerning the best embodiment of the present invention, and shows the time of mold clamping. 前記取出し装置の制御システム図である。It is a control system figure of the said taking-out apparatus. 前記取出し装置のコア型のキャビティ形成面に形成された開口の周辺構造を示す部分拡大断面図であって、型締め時を示すものである。It is a partial expanded sectional view which shows the peripheral structure of the opening formed in the cavity formation surface of the core type | mold of the said taking-out apparatus, Comprising: The time of mold clamping is shown. 図５に類似の部分拡大断面図であって、成形品の離型時を示すものである。FIG. 6 is a partially enlarged cross-sectional view similar to FIG. 5, showing a time when a molded product is released. 第１の実施形態に係る射出成形品の取出し動作を示すタイムチャートである。It is a time chart which shows taking-out operation | movement of the injection molded product which concerns on 1st Embodiment. 図３に類似の部分断面図であって、型開き時を示すものである。It is a fragmentary sectional view similar to FIG. 3, Comprising: The time of mold opening is shown. 図３に類似の部分断面図であって、外捲り時を示すものである。FIG. 4 is a partial cross-sectional view similar to FIG. 図３に類似の部分断面図であって、ロボットアームの下降時を示すものである。FIG. 4 is a partial cross-sectional view similar to FIG. 3, showing a time when the robot arm is lowered. 図３に類似の部分断面図であって、ロボットアームの上昇時（射出成形品の取出し時）を示すものである。FIG. 4 is a partial cross-sectional view similar to FIG. 3, showing a time when the robot arm is raised (when an injection molded product is taken out). 第２の実施形態に係る射出成形品の取出し動作を示すタイムチャートである。It is a time chart which shows taking-out operation | movement of the injection molded product which concerns on 2nd Embodiment. 第３の実施形態に係る射出成形品の取出し動作を示すタイムチャートである。It is a time chart which shows the taking-out operation | movement of the injection molded product which concerns on 3rd Embodiment. 従来の問題の説明図である。It is explanatory drawing of the conventional problem.

符号の説明Explanation of symbols

１ 射出成形品（車両のバンパー）
１Ａ 本体
１Ｂ アンダーカット部
１ａ 表面
１ｂ 裏面
１ｃ 外面
１ｄ 内面
１ｅ 端面
１０ 射出成形品の取出し装置
１１ キャビティ型（第１の型）
１１ａ キャビティ形成面
１２ コア型（第２の型）
１２ａ キャビティ形成面
１３ 外捲りコア（第３の型）
１３ａ キャビティ形成面
１４ キャビティ
２０ 射出機（射出手段）
３０ キャビティ型駆動装置（型開き手段）
４０ 外捲りコア駆動シリンダ（変位手段）
５０ 加圧エア供給装置（離型手段）
５１ 気体通路
５２ 蓋部材
５６ 開口
６０ 取出しロボットアーム（取出し手段） 1 Injection molded products (vehicle bumpers)
DESCRIPTION OF SYMBOLS 1A Main body 1B Undercut part 1a Front surface 1b Back surface 1c Outer surface 1d Inner surface 1e End surface 10 Injection molding product take-out device 11 Cavity mold (first mold)
11a Cavity forming surface 12 Core mold (second mold)
12a Cavity forming surface 13 Outer core (third mold)
13a Cavity forming surface 14 Cavity 20 Injection machine (injection means)
30 Cavity mold drive (mold opening means)
40 Outer core drive cylinder (displacement means)
50 Pressurized air supply device (release means)
51 gas passage 52 lid member 56 opening 60 take-out robot arm (take-out means)

Claims (5)

表面側に突出して湾曲する形状の本体と、この本体の縁部で本体の裏面側に曲折するアンダーカット部とを有し、アンダーカット部の端面が成形品の内方を指向している射出成形品を型から取り出す方法であって、
前記成形品の本体の表面を成形する第１の型と、前記本体の裏面及びこの裏面と連続する前記アンダーカット部の内面を成形する第２の型と、前記本体の表面と連続する前記アンダーカット部の外面及び前記アンダーカット部の端面を成形する第３の型とを用い、
これらの型を集合させて形成されるキャビティに溶融状態の樹脂を射出した後、第１の型を第２の型及び第３の型から離反させる型開き工程、
第１の型の離反の後、前記第３の型を第２の型の外方へ移動させることにより、成形品のアンダーカット部を前記端面を介して第２の型の外へ変位させる変位工程、及び、
第２の型の内部を通過して第２の型のキャビティ形成面に至る気体通路に気体を供給することにより、成形品を第２の型及び第３の型から離型させる離型工程
を実行することを特徴とする射出成形品の取出し方法。 Injection having a main body with a shape that protrudes and curves toward the front surface side, and an undercut portion that bends to the back side of the main body at the edge of the main body, and the end surface of the undercut portion is directed toward the inside of the molded product A method of removing a molded product from a mold,
A first mold for molding the surface of the main body of the molded article; a second mold for molding the back surface of the main body and the inner surface of the undercut portion continuous with the back surface; and the under continuous with the surface of the main body. Using a third mold for molding the outer surface of the cut portion and the end surface of the undercut portion,
A mold opening process for separating the first mold from the second mold and the third mold after injecting molten resin into a cavity formed by assembling these molds;
Displacement that displaces the undercut portion of the molded product to the outside of the second mold via the end face by moving the third mold to the outside of the second mold after the separation of the first mold. Process and
A mold release step of releasing the molded product from the second mold and the third mold by supplying gas to a gas passage that passes through the inside of the second mold and reaches the cavity forming surface of the second mold. A method for taking out an injection-molded product, which is performed. 前記請求項１に記載の射出成形品の取出し方法において、
離型工程における気体通路への気体の供給を変位工程の前に開始することを特徴とする射出成形品の取出し方法。 In the method of taking out an injection molded product according to claim 1,
A method of taking out an injection-molded product, characterized in that the supply of gas to the gas passage in the mold release step is started before the displacement step. 前記請求項１又は２に記載の射出成形品の取出し方法において、
離型工程により離型した成形品を取り出す取出し工程が設けられ、
この取出し工程では気体通路への気体の供給を続けながら成形品を取り出すことを特徴とする射出成形品の取出し方法。 In the method for taking out an injection molded product according to claim 1 or 2,
An extraction process is provided to take out the molded product released by the mold release process.
A method of taking out an injection-molded product, wherein in this take-out step, the molded product is taken out while continuing to supply gas to the gas passage. 前記請求項１から３のいずれか１項に記載の射出成形品の取出し方法において、
成形品は車両のバンパーであることを特徴とする射出成形品の取出し方法。 In the extraction method of the injection molded product according to any one of claims 1 to 3,
A method for removing an injection molded product, wherein the molded product is a bumper of a vehicle. 表面側に突出して湾曲する形状の本体と、この本体の縁部で本体の裏面側に曲折するアンダーカット部とを有し、アンダーカット部の端面が成形品の内方を指向している射出成形品を型から取り出す装置であって、
前記成形品の本体の表面を成形する第１の型と、前記本体の裏面及びこの裏面と連続する前記アンダーカット部の内面を成形する第２の型と、前記本体の表面と連続する前記アンダーカット部の外面及び前記アンダーカット部の端面を成形する第３の型とを備え、
第２の型の内部を通過して第２の型のキャビティ形成面に至る気体通路が設けられていると共に、
これらの型を集合させて形成されるキャビティに溶融状態の樹脂を射出した後、第１の型を第２の型及び第３の型から離反させる型開き手段、
第１の型の離反の後、前記第３の型を第２の型の外方へ移動させることにより、成形品のアンダーカット部を前記端面を介して第２の型の外へ変位させる変位手段、及び、
前記気体通路に気体を供給することにより、成形品を第２の型及び第３の型から離型させる離型手段
を有することを特徴とする射出成形品の取出し装置。 Injection having a main body with a shape that protrudes and curves toward the front surface side, and an undercut portion that bends to the back side of the main body at the edge of the main body, and the end surface of the undercut portion is directed toward the inside of the molded product An apparatus for removing a molded product from a mold,
A first mold for molding the surface of the main body of the molded article; a second mold for molding the back surface of the main body and the inner surface of the undercut portion continuous with the back surface; and the under continuous with the surface of the main body. A third mold for molding the outer surface of the cut portion and the end surface of the undercut portion;
A gas passage is provided that passes through the interior of the second mold and reaches the cavity forming surface of the second mold;
Mold opening means for separating the first mold from the second mold and the third mold after injecting molten resin into a cavity formed by assembling these molds;
Displacement that displaces the undercut portion of the molded product to the outside of the second mold via the end face by moving the third mold to the outside of the second mold after the separation of the first mold. Means and
An injection molded product take-out apparatus comprising release means for releasing the molded product from the second mold and the third mold by supplying gas to the gas passage.
JP2008077234A 2008-03-25 2008-03-25 Taking-out method of injection-molded product, and apparatus for the same Pending JP2009226828A (en)

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JP2009234029A (en) * 2008-03-27 2009-10-15 Mazda Motor Corp Supporting method and device of design of injection-molded article
JP2011218631A (en) * 2010-04-07 2011-11-04 Calsonic Kansei Corp Method of manufacturing soft resin molding
KR101694025B1 (en) * 2015-07-02 2017-01-06 현대자동차주식회사 Thin type injection molding skin manufacturing apparatus and taking out method of the same
US9561607B2 (en) 2012-04-23 2017-02-07 Honda Motor Co., Ltd. Mold for vehicle bumper fascia and associated molding technique
CN109016406A (en) * 2016-08-31 2018-12-18 宁波方正汽车模具股份有限公司 Liftout attachment for bumper mold
JP2019177541A (en) * 2018-03-30 2019-10-17 ダイハツ工業株式会社 Injection molding method
JP2020168874A (en) * 2015-07-22 2020-10-15 三光合成株式会社 Mold device and resin molding method

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009234029A (en) * 2008-03-27 2009-10-15 Mazda Motor Corp Supporting method and device of design of injection-molded article
JP2011218631A (en) * 2010-04-07 2011-11-04 Calsonic Kansei Corp Method of manufacturing soft resin molding
US9561607B2 (en) 2012-04-23 2017-02-07 Honda Motor Co., Ltd. Mold for vehicle bumper fascia and associated molding technique
US9840034B2 (en) 2012-04-23 2017-12-12 Honda Motor Co., Ltd. Mold for vehicle bumper fascia and associated molding technique
KR101694025B1 (en) * 2015-07-02 2017-01-06 현대자동차주식회사 Thin type injection molding skin manufacturing apparatus and taking out method of the same
JP2020168874A (en) * 2015-07-22 2020-10-15 三光合成株式会社 Mold device and resin molding method
CN109016406A (en) * 2016-08-31 2018-12-18 宁波方正汽车模具股份有限公司 Liftout attachment for bumper mold
CN109016406B (en) * 2016-08-31 2020-08-11 宁波方正汽车模具股份有限公司 Ejection device for bumper mold
JP2019177541A (en) * 2018-03-30 2019-10-17 ダイハツ工業株式会社 Injection molding method
JP7072980B2 (en) 2018-03-30 2022-05-23 ダイハツ工業株式会社 Injection molding method

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