JP3906719B2 - Assembling method of molded products - Google Patents

Assembling method of molded products Download PDF

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Publication number
JP3906719B2
JP3906719B2 JP2002081695A JP2002081695A JP3906719B2 JP 3906719 B2 JP3906719 B2 JP 3906719B2 JP 2002081695 A JP2002081695 A JP 2002081695A JP 2002081695 A JP2002081695 A JP 2002081695A JP 3906719 B2 JP3906719 B2 JP 3906719B2
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molded product
molded
assembling
molds
hole
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JP2003276052A (en
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忠夫 阪田
高宏 原田
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば雨樋部品等の建築部材の製造等において利用される、射出成形により複数の成形品を得た後、それらを嵌合している状態に組み立てる成形品の組立て方法に関する。
【０００２】
【従来の技術】
射出成形により製造した複数の成形品を、それらが嵌合している状態に組み立てる場合、従来は、夫々の成形品を異なる金型で成形した後、ロボット等を用いて嵌合させて組み立てていた。ロボット等を用いて組み立てる場合には、組立て工程において成形品相互の位置決めを行う必要があるために、組立て作業が煩雑であると共に組立てに長時間を要するという問題があった。この問題を解決するために各種の提案がされている。例えば、本出願人は特開平５−２００７６８号で、一組の金型内で複数の成形品を組立て状態で取り出し得る成形方法を提案している。この特開平５−２００７６８号で提案している方法は、穴部１０４を有する第一の成形品１０２と、前記穴部１０４に嵌合され抜け止め防止用の係止突部１１０を備えた第二の成形品１０３（図８参照）とを、図９（ａ）に示す一組の金型１０１を用いて組立て状態で取り出し得る成形方法である。
【０００３】
具体的には、図９（ｂ）に示すゲートシャットピン１３５並びに突出ピン１１７を備える一組の金型１０１（上型１０１ａ、下型１０１ｂ）により第一の成形品１０２と第二の成形品１０３を成形した後、突出ピン１１７によって組立て状態とするようにしている。成形工程では、ゲート１０６から樹脂液を導入して第一の成形品１０２の成形用キャビテイ１１４に充填すると共に、図９（ｃ）に示すように、ゲートシャットピン１３５を移動させて第二の成形品１０３の成形用キャビテイ１１５に充填する工程と、充填完了後ゲートシャットピン１３５により第一と第二の成形品の成型用キャビティ１１４、１１５を分離する工程を経て、第一の成形品１０２と第二の成形品１０３を成形するようにしている。
【０００４】
特開平５−２００７６８号で提案している方法によれば、組立て工程において成形品相互の位置決めを行う必要がなく、組立て時間の短縮化についての改善が達成される。しかし、第一の成形品と第２の成形品とを金型で成形する際に、ゲートシャットピンを開閉する工程が必要であるという成形工程の煩雑化の問題が新たに生じていた。そのため、組立て工程において成形品相互の位置決めを行う必要がないために、組立て時間の短縮化に関する改善が達成できて、且つ成形工程が単純化できる成形品の組立て方法が求められている。
【０００５】
【発明が解決しようとする課題】
本発明は、上記の事情に鑑みてなされたものであり、射出成形により複数の成形品を得た後、それらを嵌合している状態に組み立てる場合に、組立て工程において成形品相互の位置決めを行う必要がないために、組立て時間の短縮化に関する改善が達成できて、且つ成形工程が単純化できる成形品の組立て方法を提供することを目的としている。
【０００６】
【課題を解決するための手段】
請求項１に係る発明の成形品の組立て方法は、一組の金型を用いて、穴部を有する第一の成形品と、前記穴部に嵌合する嵌合部を有する第二の成形品とを、前記穴部の被嵌合面と、前記嵌合部の嵌合面とが互いに平行している状態に成形する成形工程と、成形工程により得られた第一の成形品及び第二の成形品を、前記嵌合面と平行な方向に押圧して、第一の成形品と第二の成形品の少なくとも一方を平行移動させて第一の成形品の穴部に第二の成形品の嵌合部が嵌合している組立て状態とする組立て工程とを備える成形品の組立て方法であって、
成形工程において、第一の成形品と第二の成形品とを連結する連結部を形成していて、且つ前記押圧を施す方向における連結部の肉厚を、当該連結部が前記押圧により切断するように、この連結部が形成されている位置の第一の成形品の肉厚及び第二の成形品の肉厚の何れよりも薄く形成していることを特徴とする。
【０００７】
請求項１に係る発明の成形品の組立て方法によれば、ゲートシャットピンを開閉する工程等の付加工程が成形工程で必要がないため、第一の成形品と第二の成形品とを得るための成形工程が単純化できて、且つ組立て工程において成形品相互の位置決めを行うことなしに、第一の成形品と第二の成形品とが嵌合している組立て状態を容易に得ることが可能となる。
【０００８】
請求項２に係る発明の成形品の組立て方法は、請求項１記載の成形品の組立て方法において、前記連結部が、第一の成形品の穴部の被嵌合面と、第二の成形品の嵌合部とを連結する連結部であることを特徴とする。
【０００９】
請求項３に係る発明の成形品の組立て方法は、請求項１又は請求項２記載の成形品の組立て方法において、第二の成形品の嵌合部に、第一の成形品の穴部からの抜け止めを防止する突部を形成していて、組立て工程において、押圧を施すことにより、第一の成形品の穴部内の被嵌合面が、この突部を乗り越えて、前記組立て状態となることを特徴とする。
【００１０】
この請求項３に係る発明の成形品の組立て方法によれば、第一の成形品の穴部からの抜け止めを防止する突部を、第一の成形品の穴部内の被嵌合面が乗り越えて、組立て状態となるので、第二の成形品の嵌合部に、第一の成形品の穴部からの抜け止めを防止する突部を形成している場合でも、第一の成形品と第二の成形品との金型内での配置状態を、連結部が形成されている部分を除けば、それぞれ略独立の状態とすることができるため、各成形品の形状に関しての制約が少なくなる利点がある。
【００１１】
請求項４に係る発明の成形品の組立て方法は、請求項１〜請求項３の何れかに記載の成形品の組立て方法において、前記一組の金型に設けている、第一の成形品が成形される第一のキャビティーと、第二の成形品が成形される第二のキャビティーとのそれぞれに、樹脂液が流れ込むためのゲートを備えるように一組の金型を形成していて、それぞれのゲートから樹脂液を供給して成形することを特徴とする。
【００１２】
この請求項４に係る発明の成形品の組立て方法によれば、各キャビティーに流れ込む樹脂液量を制御可能となるため、第一のキャビティーに流れ込んだ樹脂液と、第二のキャビティーに流れ込んだ樹脂液との境界位置（ウェルドライン）を制御することがが可能となる。この境界位置が、第一の成形品と第二の成形品とを連結する連結部にくるようにすれば、組立て工程における第一の成形品と第二の成形品との押圧による分離をより容易にすることが可能となる。
【００１３】
請求項５に係る発明の成形品の組立て方法は、請求項１〜請求項４の何れかに記載の成形品の組立て方法において、前記一組の金型に設けている、ノックアウトピンの動作方向を、前記押圧の方向としていて、組立て工程において、ノックアウトピンを用いて第一の成形品と第二の成形品とを押圧するようにしていることを特徴とする。
【００１４】
この請求項５に係る発明の成形品の組立て方法によれば、ノックアウトピンを用いて第一の成形品と第二の成形品とを押圧するので、押圧するための特別な装置を準備する必要がないので、設備コストを低くできる利点がある。
【００１５】
請求項６に係る発明の成形品の組立て方法は、請求項１〜請求項４の何れかに記載の成形品の組立て方法において、前記一組の金型を型締めする方向を、前記押圧の方向としていて、組立て工程において、一組の金型を型締めするための型締め力によって第一の成形品と第二の成形品とを押圧するようにしていることを特徴とする。
【００１６】
この請求項６に係る発明の成形品の組立て方法によれば、一組の金型を型締めするための型締め力によって第一の成形品と第二の成形品とを押圧するようにしているので、押圧するための特別な装置を準備する必要がないので、設備コストを低くできる利点がある。
【００１７】
【発明の実施の形態】
以下に本発明の実施の形態を図面に基づいて説明する。
【００１８】
第一の実施形態について説明する。図１〜図３は、第一の実施形態を説明するための概略断面図である。
【００１９】
この実施形態の成形工程では、図１（ａ）に示すように、金型１ａ、金型１ｂ、金型１ｃ及び金型１ｄから構成される一組の金型１を用いて、穴部４を有する第一の成形品２と、前記穴部に嵌合する嵌合部５を有する第二の成形品３とを同時に成形する。成形は、各金型（１ａ、１ｂ、１ｃ及び１ｄ）を一体化した一組の金型１に、ゲート６から樹脂液を注入して行う。そして、一組の金型１内で、図１（ａ）、（ｂ）に示すように第一の成形品２の被嵌合面７と、第二の成形品３の嵌合面８とが互いに平行している状態に、第一の成形品２と第二の成形品３とを成形する。
【００２０】
そして、成形工程において、第一の成形品２と第二の成形品３とを連結する連結部９を形成している。なお、この実施形態では、連結部９は、第一の成形品２の穴部４内にある被嵌合面７と、第二の成形品３の嵌合部５とを連結するように形成しているが、本発明における連結部９は、第一の成形品２と第二の成形品とを連結するものであればよく、例えば、第一の成形品２の穴部４近傍と第二の成形品３の嵌合面８以外の部位（例えば嵌合部５の先端面等）とを連結するように形成することも可能である。さらに、図１（ｃ）に示すように、連結部９の肉厚ｅを、この連結部９が形成されている位置の第一の成形品２の肉厚ｆ及び第二の成形品３の肉厚ｇ（図１（ｂ）参照）の何れよりも薄く形成している。なお、ここでいう連結部９の肉厚ｅは、第一の成形品２の被嵌合面７及び第二の成形品３の嵌合面８と平行する方向（図１（ｂ）で符号ｈを付けた矢印方向）における肉厚を表していて、図１（ｃ）に示すように連結部９内でこの肉厚ｅが変化している場合には、連結部９内の全ての肉厚ｅ（ｅ1、ｅ2等）を、連結部９が形成されている位置の第一の成形品２の肉厚ｆ及び第二の成形品３の肉厚ｇの何れよりも薄く形成するようにしている。
【００２１】
この実施形態の場合は、図１（ａ）に示すように、第一の成形品２の被嵌合面７と、第二の成形品３の嵌合面８とは平行状態にはあるが、連結部９で連結されている部分を除けば第一の成形品２と第二の成形品３とは金型１内で略独立状態となる位置に形成している。このように、略独立状態となる位置に各成形品を形成すると、各成形品の形状に関しての制約が少なくなるので好ましい。また、この実施形態の場合は、第二の成形品３の嵌合部５に、第一の成形品２の穴部４からの抜け止めを防止する突部１０を形成していて、後述する組立て工程において、押圧を施すことにより、第一の成形品２の穴部４内の被嵌合面７が、この突部１０を乗り越えて、組立て状態となるようにしている。
【００２２】
成形後に、連結部９で連結されている第一の成形品２と第二の成形品３とを、金型１から取出して、組み立て状態に組み立てる。組立て工程では、図２（ａ）に示すように、油圧シリンダ１１から押し出されるラム１２と、押し当て板１３とで、連結部９で連結されている第一の成形品２と第二の成形品３とを、第二の成形品３の嵌合面８と平行する方向に押圧する。この押圧により、図２（ｂ）に示すように、第一の成形品２と第二の成形品３との連結部９を切断し、ラム１２で押される第二の成形品３を平行移動させる。そして、ラム１２による押圧を続けて、第一の成形品２の穴部４内の被嵌合面７が、第二の成形品３の嵌合部５に形成している、穴部４からの抜け止めを防止する突部１０を乗り越えて、第一の成形品２と第二の成形品３とが嵌合している組立て状態となるようにしている（図３参照）。この実施形態では、その被嵌合面７が突部１０を乗り越えた第一の成形品２は、第二の成形品３の嵌合部５端部に形成している立ち上がり部１８によって、第二の成形品３の嵌合部５から脱離しないようにしている。
【００２３】
このようにして組み立てたものの斜視図を図４に示す。この実施形態では、回転可能で、安定して嵌合状態が保持される、第一の成形品２と第二の成形品３とを嵌合している組立て状態のものが得られる。
【００２４】
なお、この第１の実施形態では、図２（ｃ）に示すように、連結部９の断面形状について、第一の成形品２の穴部４内の被嵌合面７側の連結部９の厚みが、第二の成形品３の嵌合面８側の連結部９の厚みより薄く形成すると、切断面の位置を第一の成形品２の被嵌合面７側となるように制御することができ好ましい。
【００２５】
また、この第１の実施形態の変形例として、図５（ａ）に示すように、一組の金型に設けている、第一の成形品が成形される第一のキャビティー１４と、第二の成形品が成形される第二のキャビティー１５とに、それぞれ樹脂液が流れ込むためのゲート６、１６を備えるように一組の金型１を形成することもできる。その場合には、例えばそれぞれのゲート６、１６における樹脂液の射出圧力を変更する等の方法で、各キャビティー１４、１５に流れ込む樹脂液量を制御することが可能となる。そして、第一のキャビティー１４に流れ込んだ樹脂液と、第二のキャビティー１５に流れ込んだ樹脂液とのウェルドライン（境界位置）を制御することがが可能となる。このウェルドライン１６が、図５（ｂ）に示すように、第一の成形品２と第二の成形品３とを連結する連結部９にくるようにすれば、組立て工程における第一の成形品２と第二の成形品３との押圧による分離をより容易にすることが可能となる。
【００２６】
次に第二の実施形態について説明する。
【００２７】
第二の実施形態では、図６（ａ）に示すように、金型１ａ、金型１ｂ、金型１ｃ及び金型１ｄから構成される一組の金型１を用いて第一の成形品２と第二の成形品３とを同時に成形するが、その際の金型１ａにノックアウトピン１７、１７を付設していて、それらのノックアウトピン１７、１７の動作方向を、第二の成形品３の嵌合面８と平行する方向としている。そして、成形工程では、上述の第一の実施形態と同様にして、連結部９で連結されている第一の成形品２と第二の成形品３とを同時に成形する。
【００２８】
成形後、図６（ｂ）に示すように、ノックアウトピン１７、１７を設けている金型１ａに成形を終えた連結部９で連結されている第一の成形品２と第二の成形品３とが保持される状態となるように、金型１ｂ、金型１ｃ及び金型１ｄをスライドさせて型開きを行う。そして、ノックアウトピン１７、１７と、押し当て板１３とで、連結部９で連結されている第一の成形品２と第二の成形品３とを、第二の成形品３の嵌合面８と平行する方向に押圧する。この押圧により、図６（ｃ）に示すように、第一の成形品２と第二の成形品３との連結部９を切断し、第二の成形品３を平行移動させる。そして、さらに押圧を続けて、第一の成形品２の穴部４内の被嵌合面７が、第二の成形品３の嵌合部５に形成している、穴部４からの抜け止めを防止する突部１０を乗り越えて、第一の成形品２と第二の成形品３とが嵌合している組立て状態となるようにしている。ノックアウトピン１７、１７を用いて第一の成形品２と第二の成形品３とを押圧するので、第二の実施形態では、押圧するための特別な装置を準備する必要がないので、設備コストを低くできる利点がある。
【００２９】
この第二の実施形態の変形例として、図６（ｂ）に示すように、ノックアウトピン１７、１７を設けている金型１ａに成形を終えた連結部９で連結されている第一の成形品２と第二の成形品３とが保持される状態となるように、金型１ｂ、金型１ｃ及び金型１ｄをスライドさせて型開きを行った後、成形時の一組の金型１の締めを行う油圧装置（図示せず）の型締め力を用いて、図７に示すように、成形品を保持している金型１ａと、組立てのために配置した押し当て板１３とを押圧するようにすることもできる。すなわち、図６（ｃ）に示すノックアウトピン１７、１７による押圧に代えて、成形時の型締めを行う油圧装置（図示せず）の型締め力を用いて押圧することもできる。この場合も、押圧するための特別な装置を準備する必要がないので、設備コストを低くできる利点がある。
【００３０】
【発明の効果】
請求項１及び請求項２に係る発明の成形品の組立て方法では、ゲートシャットピンを開閉する工程等の付加工程が成形工程で必要がない。従って、請求項１及び請求項２に係る発明の成形品の組立て方法によれば、第一の成形品と第二の成形品とを得るための成形工程が単純化できて、且つ組立て工程において成形品相互の位置決めを行うことなしに、第一の成形品と第二の成形品とが嵌合している組立て状態を容易に得ることが可能となる。
【００３１】
請求項３に係る発明の成形品の組立て方法によれば、第二の成形品の嵌合部に、第一の成形品の穴部からの抜け止めを防止する突部を形成している場合でも、第一の成形品と第二の成形品との金型内での配置状態を、連結部が形成されている部分を除けば、それぞれ略独立の状態とすることができるため、各成形品の形状に関しての制約が少なくなるという効果をも奏する。
【００３２】
請求項４に係る発明の成形品の組立て方法によれば、各キャビティーに流れ込む樹脂液量を制御可能となるため、第一のキャビティーに流れ込んだ樹脂液と、第二のキャビティーに流れ込んだ樹脂液との境界位置（ウェルドライン）を制御することがが可能となり、この境界位置を第一の成形品と第二の成形品とを連結する連結部にくるようにすれば、組立て工程における第一の成形品と第二の成形品との押圧による分離をより容易にすることができるという効果をも奏する。
【００３３】
請求項５に係る発明の成形品の組立て方法によれば、ノックアウトピンを用いて第一の成形品と第二の成形品とを押圧するので、押圧するための特別な装置を準備する必要がないので、設備コストを低くできるという効果をも奏する。
【００３４】
請求項６に係る発明の成形品の組立て方法によれば、一組の金型を型締めするための型締め力によって第一の成形品と第二の成形品とを押圧するようにしているので、押圧するための特別な装置を準備する必要がないので、設備コストを低くできるという効果をも奏する。
【図面の簡単な説明】
【図１】（ａ）は第一の実施形態の成形工程を説明するための断面図、（ｂ）はＡ部拡大図、（ｃ）はＢ部拡大図である。
【図２】（ａ）は第一の実施形態の組立て工程を説明するための断面図、（ｂ）はＣ部拡大図、（ｃ）はＤ部拡大図である。
【図３】（ａ）は第一の実施形態の図２に示す工程以降の組立て工程を説明するための断面図、（ｂ）はＥ部拡大図である。
【図４】第一の実施形態の成形品を組み立てた組立て状態を示す斜視図である。
【図５】（ａ）は第一の実施形態の成形工程の変形例を説明するための断面図、（ｂ）はＡ部拡大図である。
【図６】（ａ）、（ｂ）、（ｃ）は第二の実施形態の工程を説明するための工程毎の断面図である。
【図７】第二の実施形態の変形例を説明するための断面図である。
【図８】従来技術における成形品を組み立てた組立て状態を示す斜視図である。
【図９】（ａ）は従来技術の成形工程を説明するための金型の平面図、（ｂ）はそのＢ−Ｂ断面図、（ｃ）はＤ部拡大図である。
【符号の説明】
１ 一組の金型
１ａ、１ｂ、１ｃ、１ｄ 金型
２ 第一の成形品
３ 第二の成形品
４ 穴部
５ 嵌合部
６、１６ ゲート
７ 被嵌合面
８ 嵌合面
９ 連結部
１０ 突部
１１ 油圧シリンダ
１２ ラム
１３ 押し当て板
１４、１５ キャビティ
１６ ウェルドライン
１７ ノックアウトピン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for assembling a molded product that is used in, for example, manufacturing a building member such as a rain gutter component, etc., after obtaining a plurality of molded products by injection molding and then assembling them into a fitted state.
[0002]
[Prior art]
In the case of assembling a plurality of molded products manufactured by injection molding so that they are fitted, conventionally, after molding each molded product with different molds, it is assembled by fitting using a robot or the like. It was. In the case of assembling using a robot or the like, there is a problem that the assembly work is complicated and the assembly takes a long time because it is necessary to position the molded products in the assembling process. Various proposals have been made to solve this problem. For example, the present applicant has proposed a molding method capable of taking out a plurality of molded products in an assembled state in a set of molds in Japanese Patent Application Laid-Open No. 5-200768. The method proposed in Japanese Patent Application Laid-Open No. 5-200768 includes a first molded product 102 having a hole 104 and a locking projection 110 which is fitted in the hole 104 and prevents the removal. This is a molding method in which the second molded product 103 (see FIG. 8) can be taken out in an assembled state using a set of molds 101 shown in FIG. 9A.
[0003]
Specifically, the first molded product 102 and the second molded product are formed by a set of molds 101 (upper mold 101a and lower mold 101b) including the gate shut pin 135 and the protruding pin 117 shown in FIG. 9B. After forming 103, the protruding pins 117 are brought into an assembled state. In the molding process, the resin liquid is introduced from the gate 106 and filled into the molding cavity 114 of the first molded product 102, and the gate shut pin 135 is moved to move the second mold as shown in FIG. 9C. The process of filling the molding cavity 115 of the molded article 103 and the process of separating the molding cavities 114 and 115 of the first and second molded articles by the gate shut pin 135 after the filling is completed are performed. The second molded product 103 is molded.
[0004]
According to the method proposed in Japanese Patent Laid-Open No. 5-200768, it is not necessary to position the molded products in the assembly process, and an improvement in shortening the assembly time is achieved. However, when the first molded product and the second molded product are molded with a mold, a new problem of complication of the molding process that a process of opening and closing the gate shut pin is necessary has occurred. For this reason, since it is not necessary to position the molded products in the assembly process, there is a need for a method for assembling molded products that can achieve improvement in shortening the assembly time and simplify the molding process.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and after obtaining a plurality of molded products by injection molding, when assembling them into a fitted state, positioning of the molded products in the assembly process is performed. It is an object of the present invention to provide a method for assembling a molded product which can achieve an improvement related to shortening of the assembly time and can simplify the molding process because it is not necessary to perform this.
[0006]
[Means for Solving the Problems]
The method for assembling a molded product of the invention according to claim 1 is a second molded product having a first molded product having a hole and a fitting portion fitted into the hole using a set of molds. A molding step in which the mating surface of the hole and the mating surface of the fitting portion are parallel to each other, a first molded product obtained by the molding step, and a first molding product The second molded product is pressed in a direction parallel to the fitting surface, and at least one of the first molded product and the second molded product is moved in parallel to the second molded product in the hole of the first molded product. An assembly method of a molded product comprising an assembly process in which an assembly state in which a fitting portion of the molded product is fitted,
In the molding step, a connecting portion that connects the first molded product and the second molded product is formed, and the connecting portion cuts the wall thickness of the connecting portion in the pressing direction by the pressing. As described above, the thickness of the first molded product and the thickness of the second molded product at the position where the connecting portion is formed is smaller.
[0007]
According to the method for assembling a molded product of the invention according to claim 1, since an additional process such as a process of opening and closing the gate shut pin is not necessary in the molding process, the first molded product and the second molded product are obtained. The assembly process in which the first molded product and the second molded product are fitted can be easily obtained without positioning the molded products in the assembly process. Is possible.
[0008]
A method for assembling a molded product according to a second aspect of the present invention is the method for assembling the molded product according to the first aspect, wherein the connecting portion includes a fitting surface of a hole of the first molded product and a second molded product. It is a connection part which connects the fitting part of goods.
[0009]
The method for assembling the molded product according to claim 3 is the method for assembling the molded product according to claim 1 or 2, wherein the fitting portion of the second molded product is inserted into the fitting portion of the first molded product. A protrusion is formed to prevent the slippage of the first molded product, and by pressing in the assembly process, the mating surface in the hole of the first molded product gets over the protrusion, and the assembled state It is characterized by becoming.
[0010]
According to the method for assembling the molded product of the invention according to claim 3, the protrusions for preventing the first molded product from being prevented from coming out from the hole are provided with the mating surface in the hole of the first molded product. Even if a protrusion that prevents the first molded product from coming out of the hole is formed in the fitting portion of the second molded product, the first molded product is overcome because it is assembled. Since the arrangement state of the first and second molded products in the mold can be made substantially independent of each other except for the portion where the connecting portion is formed, there are restrictions on the shape of each molded product. There is an advantage of less.
[0011]
A method for assembling a molded product according to a fourth aspect of the present invention is the method for assembling a molded product according to any one of the first to third aspects, wherein the first molded product is provided in the set of molds. A pair of molds is formed so as to include a gate for the resin liquid to flow into each of the first cavity in which the second molded product is molded and the second cavity in which the second molded product is molded. Then, a resin liquid is supplied from each gate and molding is performed.
[0012]
According to the method for assembling a molded article of the invention according to claim 4, since the amount of resin liquid flowing into each cavity can be controlled, the resin liquid flowing into the first cavity and the second cavity It is possible to control the boundary position (weld line) with the resin liquid that has flowed in. If this boundary position comes to the connecting part that connects the first molded product and the second molded product, the separation by pressing the first molded product and the second molded product in the assembling process can be further improved. It can be made easy.
[0013]
A method for assembling a molded product according to a fifth aspect of the present invention is the method for assembling a molded product according to any one of the first to fourth aspects, wherein the operation direction of the knockout pin provided in the set of molds is as follows. Is the pressing direction, and in the assembling process, the first molded product and the second molded product are pressed using a knockout pin.
[0014]
According to the method for assembling a molded product of the invention according to claim 5, since the first molded product and the second molded product are pressed using the knockout pin, it is necessary to prepare a special device for pressing. Therefore, there is an advantage that the equipment cost can be reduced.
[0015]
A method for assembling a molded product according to a sixth aspect of the present invention is the method for assembling a molded product according to any one of the first to fourth aspects, wherein the direction of clamping the set of molds is set to In the assembling process, the first molded product and the second molded product are pressed by a clamping force for clamping a set of molds.
[0016]
According to the method for assembling a molded product of the invention according to claim 6, the first molded product and the second molded product are pressed by a clamping force for clamping a set of molds. Since there is no need to prepare a special device for pressing, there is an advantage that the equipment cost can be reduced.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0018]
A first embodiment will be described. 1 to 3 are schematic cross-sectional views for explaining the first embodiment.
[0019]
In the molding process of this embodiment, as shown in FIG. 1 (a), a hole 4 is formed using a set of molds 1 including a mold 1a, a mold 1b, a mold 1c, and a mold 1d. The first molded product 2 having the above and the second molded product 3 having the fitting portion 5 fitted in the hole are simultaneously molded. Molding is performed by injecting a resin liquid from a gate 6 into a set of molds 1 in which the respective molds (1a, 1b, 1c and 1d) are integrated. Then, in the set of molds 1, as shown in FIGS. 1A and 1B, the fitted surface 7 of the first molded product 2 and the fitted surface 8 of the second molded product 3 Are molded in parallel with each other, the first molded product 2 and the second molded product 3 are molded.
[0020]
In the molding step, a connecting portion 9 that connects the first molded product 2 and the second molded product 3 is formed. In this embodiment, the connecting portion 9 is formed so as to connect the fitted surface 7 in the hole 4 of the first molded product 2 and the fitting portion 5 of the second molded product 3. However, the connecting portion 9 in the present invention may be anything that connects the first molded product 2 and the second molded product. For example, the vicinity of the hole 4 of the first molded product 2 and the first It is also possible to form the second molded product 3 so as to be connected to a portion other than the fitting surface 8 (for example, the front end surface of the fitting portion 5). Furthermore, as shown in FIG.1 (c), the thickness e of the connection part 9 is made into the thickness f of the 1st molded product 2 of the position in which this connection part 9 is formed, and 2nd molded product 3. It is formed thinner than any thickness g (see FIG. 1B). The thickness e of the connecting portion 9 here is a direction parallel to the mating surface 7 of the first molded product 2 and the mating surface 8 of the second molded product 3 (in FIG. 1B). h), the thickness e in the connecting portion 9 changes as shown in FIG. 1 (c). The thickness e (e 1 , e 2, etc.) is made thinner than any of the thickness f of the first molded product 2 and the thickness g of the second molded product 3 at the position where the connecting portion 9 is formed. I am doing so.
[0021]
In the case of this embodiment, as shown in FIG. 1A, the fitted surface 7 of the first molded product 2 and the fitted surface 8 of the second molded product 3 are in a parallel state. The first molded product 2 and the second molded product 3 are formed in positions that are substantially independent in the mold 1 except for the portion connected by the connecting portion 9. As described above, it is preferable to form each molded product at a position that is substantially in an independent state because restrictions on the shape of each molded product are reduced. In the case of this embodiment, a protrusion 10 that prevents the first molded product 2 from coming off from the hole 4 is formed in the fitting portion 5 of the second molded product 3, which will be described later. By applying pressure in the assembly process, the mating surface 7 in the hole 4 of the first molded product 2 gets over the protrusion 10 and enters an assembled state.
[0022]
After the molding, the first molded product 2 and the second molded product 3 connected by the connecting portion 9 are taken out from the mold 1 and assembled into an assembled state. In the assembling process, as shown in FIG. 2A, the first molded product 2 and the second molded product connected by the connecting portion 9 with the ram 12 pushed out from the hydraulic cylinder 11 and the pressing plate 13. The product 3 is pressed in a direction parallel to the fitting surface 8 of the second molded product 3. By this pressing, as shown in FIG. 2B, the connecting portion 9 between the first molded product 2 and the second molded product 3 is cut, and the second molded product 3 pushed by the ram 12 is translated. Let And from the hole 4 which the to-be-fitted surface 7 in the hole 4 of the 1st molded article 2 forms in the fitting part 5 of the 2nd molded article 3 by continuing the press by the ram 12 Overcoming the protrusion 10 that prevents the detachment of the first molded product 2 and the second molded product 3 are assembled (see FIG. 3). In this embodiment, the first molded product 2 whose mating surface 7 has overcome the protrusion 10 is formed by the rising portion 18 formed at the end of the fitting portion 5 of the second molded product 3. The second molded product 3 is prevented from being detached from the fitting portion 5.
[0023]
FIG. 4 shows a perspective view of the assembly as described above. In this embodiment, an assembled state is obtained in which the first molded product 2 and the second molded product 3 are fitted, which are rotatable and stably kept in a fitted state.
[0024]
In addition, in this 1st Embodiment, as shown in FIG.2 (c), about the cross-sectional shape of the connection part 9, the connection part 9 by the side of the to-be-fitted surface 7 in the hole 4 of the 1st molded article 2 is shown. Is formed to be thinner than the thickness of the connecting portion 9 on the fitting surface 8 side of the second molded product 3, the position of the cut surface is controlled to be on the mated surface 7 side of the first molded product 2. This is preferable.
[0025]
Further, as a modification of the first embodiment, as shown in FIG. 5A, a first cavity 14 provided in a set of molds, in which a first molded product is molded, The pair of molds 1 can also be formed so as to include gates 6 and 16 for allowing the resin liquid to flow into the second cavity 15 in which the second molded product is molded. In that case, the amount of the resin liquid flowing into the cavities 14 and 15 can be controlled by, for example, changing the injection pressure of the resin liquid at the respective gates 6 and 16. Then, it is possible to control the weld line (boundary position) between the resin liquid flowing into the first cavity 14 and the resin liquid flowing into the second cavity 15. As shown in FIG. 5 (b), if the weld line 16 comes to the connecting portion 9 that connects the first molded product 2 and the second molded product 3, the first molding in the assembly process is performed. Separation by pressing the product 2 and the second molded product 3 can be made easier.
[0026]
Next, a second embodiment will be described.
[0027]
In the second embodiment, as shown in FIG. 6 (a), a first molded product using a set of molds 1 including a mold 1a, a mold 1b, a mold 1c, and a mold 1d. 2 and the second molded product 3 are molded at the same time. Knockout pins 17 and 17 are attached to the mold 1a at that time, and the operation direction of these knockout pins 17 and 17 is determined according to the second molded product. 3 is parallel to the fitting surface 8. In the molding step, the first molded product 2 and the second molded product 3 connected by the connecting portion 9 are simultaneously molded in the same manner as in the first embodiment described above.
[0028]
After the molding, as shown in FIG. 6 (b), the first molded product 2 and the second molded product connected to the mold 1a provided with the knockout pins 17 and 17 by the connecting portion 9 after the molding. The mold 1b, the mold 1c, and the mold 1d are slid so that the mold 3 is held. Then, the first molded product 2 and the second molded product 3 connected by the connecting portion 9 with the knockout pins 17 and 17 and the pressing plate 13 are connected to the fitting surface of the second molded product 3. Press in the direction parallel to By this pressing, as shown in FIG. 6C, the connecting portion 9 between the first molded product 2 and the second molded product 3 is cut, and the second molded product 3 is moved in parallel. And further pressing is continued, and the to-be-fitted surface 7 in the hole 4 of the first molded product 2 is formed in the fitting portion 5 of the second molded product 3 and is removed from the hole 4. The first molded product 2 and the second molded product 3 are brought into an assembled state over the protruding portion 10 for preventing the stop. Since the first molded product 2 and the second molded product 3 are pressed using the knockout pins 17, 17, there is no need to prepare a special device for pressing in the second embodiment. There is an advantage that the cost can be lowered.
[0029]
As a modification of the second embodiment, as shown in FIG. 6 (b), the first molding connected to the mold 1a provided with the knockout pins 17 and 17 by the connecting portion 9 which has been molded. The mold 1b, the mold 1c, and the mold 1d are slid so that the product 2 and the second molded product 3 are held. As shown in FIG. 7, using a clamping force of a hydraulic device (not shown) for clamping 1, a mold 1 a holding a molded product, a pressing plate 13 arranged for assembly, Can also be pressed. That is, it can also press using the clamping force of the hydraulic device (not shown) which clamps at the time of shaping | molding instead of the press by the knockout pins 17 and 17 shown in FIG.6 (c). Also in this case, there is no need to prepare a special device for pressing, so there is an advantage that the equipment cost can be reduced.
[0030]
【The invention's effect】
In the method for assembling a molded product according to the first and second aspects of the present invention, an additional step such as a step of opening and closing the gate shut pin is not required in the molding step. Therefore, according to the method for assembling the molded product of the inventions according to claims 1 and 2, the molding process for obtaining the first molded product and the second molded product can be simplified, and in the assembly process. It is possible to easily obtain an assembled state in which the first molded product and the second molded product are fitted without positioning the molded products.
[0031]
According to the method for assembling a molded product of the invention according to claim 3, when a protrusion for preventing the first molded product from coming off from the hole is formed in the fitting portion of the second molded product. However, since the arrangement of the first molded product and the second molded product in the mold can be made substantially independent of each other except for the portion where the connecting portion is formed, each molding There is also an effect that restrictions on the shape of the product are reduced.
[0032]
According to the assembling method of the molded product of the invention according to claim 4, since the amount of the resin liquid flowing into each cavity can be controlled, the resin liquid flowing into the first cavity and the second cavity flow into the second cavity. It is possible to control the boundary position (weld line) with the resin liquid, and if this boundary position is located at the connecting part that connects the first molded product and the second molded product, the assembly process There is also an effect that separation by pressing between the first molded product and the second molded product can be facilitated.
[0033]
According to the method for assembling a molded product of the invention according to claim 5, since the first molded product and the second molded product are pressed using the knockout pin, it is necessary to prepare a special device for pressing. Since there is no, the effect that the equipment cost can be lowered is also produced.
[0034]
According to the method for assembling a molded product of the invention according to claim 6, the first molded product and the second molded product are pressed by a clamping force for clamping a set of molds. Therefore, since it is not necessary to prepare a special device for pressing, there is an effect that the equipment cost can be reduced.
[Brief description of the drawings]
FIGS. 1A and 1B are cross-sectional views for explaining a molding process according to the first embodiment, FIG. 1B is an enlarged view of a portion A, and FIG.
2A is a cross-sectional view for explaining an assembly process of the first embodiment, FIG. 2B is an enlarged view of a C portion, and FIG. 2C is an enlarged view of a D portion;
3A is a cross-sectional view for explaining an assembly process after the process shown in FIG. 2 of the first embodiment, and FIG. 3B is an enlarged view of an E part;
FIG. 4 is a perspective view showing an assembled state in which the molded product of the first embodiment is assembled.
5A is a cross-sectional view for explaining a modification of the molding process of the first embodiment, and FIG. 5B is an enlarged view of a part A;
FIGS. 6A, 6B, and 6C are cross-sectional views for each process for explaining a process of the second embodiment. FIGS.
FIG. 7 is a cross-sectional view for explaining a modification of the second embodiment.
FIG. 8 is a perspective view showing an assembled state in which molded articles are assembled in the prior art.
9A is a plan view of a mold for explaining a conventional molding process, FIG. 9B is a sectional view taken along the line BB, and FIG. 9C is an enlarged view of a portion D;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Set of metal mold | die 1a, 1b, 1c, 1d metal mold | die 2 1st molded product 3 2nd molded product 4 Hole part 5 Fitting part 6, 16 Gate 7 Mated surface 8 Fitted surface 9 Connection part 10 Projection 11 Hydraulic cylinder 12 Ram 13 Pressing plate 14, 15 Cavity 16 Weld line 17 Knockout pin

Claims (6)

一組の金型を用いて、穴部を有する第一の成形品と、前記穴部に嵌合する嵌合部を有する第二の成形品とを、前記穴部の被嵌合面と、前記嵌合部の嵌合面とが互いに平行している状態に成形する成形工程と、成形工程により得られた第一の成形品及び第二の成形品を、前記嵌合面と平行な方向に押圧して、第一の成形品と第二の成形品の少なくとも一方を平行移動させて第一の成形品の穴部に第二の成形品の嵌合部が嵌合している組立て状態とする組立て工程とを備える成形品の組立て方法であって、
成形工程において、第一の成形品と第二の成形品とを連結する連結部を形成していて、且つ前記押圧を施す方向における連結部の肉厚を、当該連結部が前記押圧により切断するように、この連結部が形成されている位置の第一の成形品の肉厚及び第二の成形品の肉厚の何れよりも薄く形成していることを特徴とする成形品の組立て方法。Using a set of molds, a first molded product having a hole, and a second molded product having a fitting part that fits into the hole, the mating surface of the hole, A molding process in which the fitting surface of the fitting part is molded in parallel with each other, and a first molded product and a second molded product obtained by the molding process are parallel to the fitting surface. Assembling state in which at least one of the first molded product and the second molded product is translated and the fitting portion of the second molded product is fitted in the hole of the first molded product An assembly method of a molded product comprising an assembly step,
In the molding step, a connecting portion that connects the first molded product and the second molded product is formed, and the connecting portion cuts the wall thickness of the connecting portion in the pressing direction by the pressing. As described above, the method for assembling the molded product is characterized in that it is formed thinner than both the thickness of the first molded product and the thickness of the second molded product at the position where the connecting portion is formed. 前記連結部が、第一の成形品の穴部の被嵌合面と、第二の成形品の嵌合部とを連結する連結部であることを特徴とする請求項１記載の成形品の組立て方法。  2. The molded product according to claim 1, wherein the coupling portion is a coupling portion that couples the mating surface of the hole of the first molded product and the fitting portion of the second molded product. Assembling method. 第二の成形品の嵌合部に、第一の成形品の穴部からの抜け止めを防止する突部を形成していて、組立て工程において、押圧を施すことにより、第一の成形品の被嵌合面が、この突部を乗り越えて、前記組立て状態となることを特徴とする請求項１又は請求項２記載の成形品の組立て方法。  In the fitting part of the second molded product, a protrusion that prevents the first molded product from being pulled out from the hole is formed, and by pressing in the assembly process, The method of assembling a molded product according to claim 1 or 2, wherein the mating surface gets over the protrusion and enters the assembled state. 前記一組の金型に設けている、第一の成形品が成形される第一のキャビティーと、第二の成形品が成形される第二のキャビティーとのそれぞれに、樹脂液が流れ込むためのゲートを備えるように一組の金型を形成していて、それぞれのゲートから樹脂液を供給して成形することを特徴とする請求項１〜請求項３の何れかに記載の成形品の組立て方法。  The resin liquid flows into each of the first cavity in which the first molded product is molded and the second cavity in which the second molded product is molded, provided in the set of molds. A molded product according to any one of claims 1 to 3, wherein a set of molds is formed so as to be provided with a gate for molding, and a resin liquid is supplied from each gate. Assembling method. 前記一組の金型に設けている、ノックアウトピンの動作方向を、前記押圧の方向としていて、組立て工程において、ノックアウトピンを用いて第一の成形品と第二の成形品とを押圧するようにしていることを特徴とする請
求項１〜請求項４の何れかに記載の成形品の組立て方法。The operation direction of the knockout pins provided in the set of molds is the pressing direction, and the first molded product and the second molded product are pressed using the knockout pins in the assembly process. 5. The method for assembling a molded product according to claim 1, wherein the molded product is assembled. 前記一組の金型を型締めする方向を、前記押圧の方向としていて、組立て工程において、一組の金型を型締めするための型締め力によって第一の成形品と第二の成形品とを押圧するようにしていることを特徴とする請求項１〜請求項４の何れかに記載の成形品の組立て方法。  The direction in which the set of molds is clamped is the direction of pressing, and in the assembly process, the first molded product and the second molded product by the clamping force for clamping the set of molds. The method for assembling a molded product according to any one of claims 1 to 4, wherein the assembly is pressed.
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