JP3565961B2 - Manufacturing method and mold for manufacturing laminated molded products - Google Patents

Manufacturing method and mold for manufacturing laminated molded products Download PDF

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JP3565961B2
JP3565961B2 JP29232295A JP29232295A JP3565961B2 JP 3565961 B2 JP3565961 B2 JP 3565961B2 JP 29232295 A JP29232295 A JP 29232295A JP 29232295 A JP29232295 A JP 29232295A JP 3565961 B2 JP3565961 B2 JP 3565961B2
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mold
skin material
movable
fixed mold
movable frame
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JPH09131752A (en
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義昭 齋藤
知和 阿部
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Idemitsu Petrochemical Co Ltd
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Idemitsu Petrochemical Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C45/14196—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being positioned around an edge of the injected part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C45/14196—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being positioned around an edge of the injected part
    • B29C2045/14204—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being positioned around an edge of the injected part the edges formed by an intermediate mould part

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • 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】
本発明は表皮材と熱可塑性樹脂からなる積層成形品に関するものであり、表皮材の端部が成形品の裏面に向けて折り返され、樹脂でその端部が隠蔽されていることを特徴とする積層成形品に関するものである。本発明により得られる成形品は、事務用の椅子や自動車内装品等に適用することができる。
【０００２】
【従来の技術】
従来より、表面に表皮材を一体化させた積層成形品が知られている。成形品を積層構造にすることで、表面の表皮材により良好な外観やクッション性が得られる上に、表皮材のみの変更で、成形品の表面の質感等を容易に変更できるという利点がある。このような成形品は、予め金型のキャビティー内に装着しておいたシートやフィルム等の表皮材の上に溶融樹脂を充填することにより成形する。
【０００３】
従来、表皮材はトリミング後、成形品の裏面へ手で折り曲げる等が必要で、手間がかかり、生産性が悪く、また表皮材によっては折り曲げた際にそれを固定するのが困難であった。
また、特開昭６１−１３７７１４号には、雌金型側の製品外周部に分割枠を設け、雌金型と分割枠とで表皮材を挟持し、溶融樹脂をキャビティーに充填後、キャビティーの内方向に摺動させて表皮材の端部を折り返す方法が開示されているが、クッション材付きの表皮材の場合には、端部でクッション材が露出する等の不都合がある。
【０００４】
さらに、特開平５−６４８２５号には、表皮材の端部を折り返すスライドコアを金型に設け、折り返した表皮材をスライドコアに取り付けたヒータで加熱し、樹脂に溶着させる方法が開示されている。これも上記と同様に端部でクッション材が露出する等の不都合がある上、金型が複雑で高価なものとなる。
【０００５】
【発明が解決しようとする課題】
本発明は、表皮材の端部を成形品の裏面に向けて折り返し、樹脂でその端部を隠蔽するようにして、外観の優れた積層成形品の製造方法と製造用金型を提供するものである。
【０００７】
【課題を解決するための手段】
第一の発明は、固定金型、この固定金型に対向配置された可動金型、及びこの可動金型とともに、可動金型の型開き及び型締め方向に固定金型の外周面を摺動する可動枠型でキャビティーを形成する製造用金型を用いて熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品を製造する方法において、
（１）型開き時に表皮材をその端部がはみ出した状態で前記固定金型のキャビティーを構成する固定金型面に装着し、
（２）可動金型と共に可動枠型を型締め方向に移動させ、型締めして、前記固定金型の前記固定金型面の外周部に形成された段差部と前記可動枠型の側面とで表皮材の端部を滑動可能に挟持し、
（３）固定金型面と表皮材の間に溶融樹脂を注入しながら、可動枠型の前記側面の前記可動金型側の端部に突設され、前記可動金型の前記キャビティーを形成する側面よりもキャビティー内側に、隙間を空けて対向配置された仕切り壁に沿って、樹脂圧力により表皮材の端部を摺動させ、
（４）可動金型の側面と可動枠型の仕切り壁との間に充填される溶融樹脂の圧力により表皮材の端部を成形品の裏面に向けて折り返し、
（５）固定金型の段差部と可動枠型の仕切り壁の間に充填される溶融樹脂により表皮材の端部を隠蔽することを特徴とする積層成形品の製造方法を提供するものである。
【０００８】
第二の発明は、固定金型、この固定金型に対向配置された可動金型、及びこの可動金型とともに、可動金型の型開き及び型締め方向に固定金型の外周面を摺動する可動枠型でキャビティーを形成する製造用金型を用いて熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品を製造する方法において、
（１）型開き時に表皮材をその端部がはみ出した状態で前記固定金型の前記キャビティーを構成する固定金型面に装着し、
（２）可動金型と共に可動枠型を型締め方向に移動させて、前記固定金型の前記固定金型面の外周部に形成された段差部と前記可動枠型の側面とで表皮材の端部を滑動可能に挟持し、
（３）圧縮代を残して型締めした時点で、固定金型面と表皮材の間へ溶融樹脂の注入を開始し、
（４）可動枠型の前記側面の前記可動金型側の端部に突設され、前記可動金型の前記キャビティーを形成する側面よりもキャビティー内側に、隙間を空けて対向配置された仕切り壁に沿って、溶融樹脂の圧力により表皮材の端部を摺動させ、
（５）溶融樹脂の注入完了の直前ないし直後に最終的な型締めを開始し、
（６）可動金型の側面と可動枠型の仕切り壁の間に充填される溶融樹脂の圧力により表皮材の端部を成形品の裏面に向けて折り返し、
（７）固定金型の段差部と可動枠型の仕切り壁の間に充填される溶融樹脂により表皮材の端部を隠蔽することを特徴とする積層成形品の製造方法を提供するものである。
【０００９】
第三の発明は、熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品であり、表皮材の端部が成形品の裏面に向けて折り返され、かつ、熱可塑性樹脂層で隠蔽された積層成形品を製造する金型において、固定金型、この固定金型に対向配置された可動金型、及びこの可動金型とともに、可動金型の型開き及び型締め方向に固定金型の外周面を摺動する可動枠型でキャビティーを形成し、前記固定金型は、前記表皮材の端部がはみ出すように設置されるとともに、前記キャビティーを形成する固定金型面と、この固定金型面の外周部に形成され、表皮材の端部を隠蔽する樹脂が充填されるキャビティー部分を構成する段差部とを備え、前記可動枠型は、前記段差部の側面とともに、前記表皮材の端部を挟持する側面と、この側面の前記可動金型側の端部に突設され、前記表皮材の端部を折り返すための仕切り壁とを有し、前記仕切り壁は、前記可動金型の前記キャビティーを形成する側面よりもキャビティー内側に隙間を空けて対向配置されることを特徴とする積層成形品の製造用金型を提供するものである。
【００１１】
【発明の実施の形態】
本発明は、熱可塑性樹脂の射出成形、射出圧縮成形、または射出プレス成形等で成形される表皮材を用いた積層成形品を対象とするものである。例えば、表面がクッション性のある事務用の椅子や織布の自動車用シート、自動車のドアトリムやインストルメントパネル等が挙げられる。
【００１２】
本発明の熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品は、図１に示すように表皮材の端部が成形品の裏面に向けて折り返され、かつ、熱可塑性樹脂層で隠蔽されていることを特徴とする積層成形品である。
本発明では、以下に示すような表皮材、熱可塑性樹脂、成形機、金型及び製造方法を採用できる。
【００１３】
対象とする表皮材としては、熱可塑性樹脂シート、織布、不織布や、塩化ビニル樹脂、オレフィン系エラストマー、織布、不織布等からなる表層材に発泡体または熱可塑性樹脂を裏打ちした積層シート等を採用でき、クッション性のある表皮材が好ましい。
対象とする熱可塑性樹脂としては、ポリプロピレン、ポリスチレン、ポリエチレン、ＡＢＳ、ポリカーボネート、ポリアミド等の熱可塑性樹脂及びこれらの熱可塑性樹脂にエチレン・α−オレフィン共重合体エラストマー等のエラストマーや、タルク、マイカ、炭酸カルシウム、ガラス繊維、炭素繊維等の無機充填材を添加したものが採用できる。
【００１４】
本発明に使用できる成形機は、下記の金型を取り付けることができ、その機能を果たせるならば、いずれの熱可塑性樹脂用の射出成形機、射出圧縮成形機、射出プレス成形機等でよい。
本発明の金型は、固定金型、可動金型及び固定金型の外周部を摺動する可動枠型でキャビティーを形成する構造となっている。以下に図２〜５に基づいて説明する。
【００１５】
雄型としての固定金型２には、成形品の裏面に対応する固定金型面の外周部の側面に段差部１７が設けられている。この段差部は、図４や図５から分かるように、表皮材の端部７を固定金型の段差部の側面２０と可動枠型３の側面にあたる表皮材挟持面２９とで挟持し、表皮材６と固定金型面１６の間に図示されていない成形機から充填される溶融樹脂１０の圧力で表皮材６が滑動できる必要がある。また、この段差部１７は、溶融樹脂１０を充填し、完全に型締めした時には表皮材の端部７を隠蔽する樹脂１１のキャビティーを形成する。その段差部深さ１８は、表皮材６の厚みや材質により適宜調整し、少なくとも隠蔽部の樹脂１１をその樹脂からなる成形品基体１３に保持できだけの強度を有するようにする必要がある。クッション性の表皮材の場合は、少なくとも表皮材６の厚みよりも小さく設定し、表皮材の端部７付近を可動枠型の表皮材挟持面２９とで挟持できるようにする。また、その段差部長さ１９は、少なくとも表皮材の端部７を隠蔽する必要がある。さらに、型締め完了時に、この端部面２１と固定金型面１６の金型の移動方向の距離は、型締め時の可動枠型の仕切り壁の基部面２４と固定金型面１６の金型の移動方向の距離に比べて、短くなるように設定するのがよい。これにより、表皮材の端部を隠蔽する樹脂１１が、成形品の外周部の表皮材よりはみ出すことがなく、外観上好ましい。
【００１６】
また、固定金型面１６には、表皮材６を仮止めするための針、または真空吸引孔及びその付帯装置等を設けるとよい。
可動枠型３は、型開き及び型締め方向に移動できるように固定金型２及び／または可動金型４に設置または連結されている。型開き時には可動枠型の固定金型対向面２７は、金型の移動方向に固定金型面１６よりも離れ、表皮材６を金型１の定位置に装着しやすいようにするとよい。そのため、可動枠型３は、型開きにともない固定金型２より離れるように、駆動させる手段を有するのが好ましい。例えば、可動枠型３を固定金型の摺動軸受け部３２に設け、その摺動軸３３に設けたスプリング３４と固定金型２と連結した引張リング３５で型開き及び型締め方向に移動できるようにする。また、油圧機構等で可動枠型３を移動できる装置を設けてもよい。
【００１７】
可動枠型の固定金型面側の表皮材挟持面端部３０には、表皮材６に傷や裂けが生じないように、また円滑に挟持することができるようにテーパーを設けるとよい。
可動枠型の可動金型面側の表皮材挟持面端部３１には、仕切り壁２３が突設されている。この仕切り壁２３は、表皮材６がそれと固定金型面１６の間に充填される溶融樹脂１０の圧力で、上記のように表皮材挟持面と固定金型面の外周部の側面との間を滑動し、型締め完了時に表皮材の端部が樹脂に隠蔽される際、表皮材６を摺動させ、それを折り返すことができ、またその端部７を樹脂で隠蔽できるような形状と表面性を有する必要がある。表皮材を円滑に摺動させるには、曲率半径が大きく、仕切り壁の厚み２５が厚い方が好ましく、表皮材の端部７を樹脂で隠蔽し、外観をより良好にするには、仕切り壁の厚み２５は薄く、その高さ２６は高い方が好ましい傾向にあるので、表皮材の厚みや種類により仕切り壁の形状を適宜調整する必要がある。
【００１８】
可動枠型の仕切り壁２３やその基部面２４周辺は、表皮材６を折り返し、その中に樹脂を充填させる成形品基体の外周部１４に相当する箇所である。この成形品基体の外周部１４は、前記仕切り壁２３、可動枠型の可動金型対向面２８及び可動金型の製品面３６とで形成されるキャビティーによりその形状が決められるので、必要とされる強度や形状、さらには表皮材の厚み等を考慮して、成形品基体の外周部の厚み１５を調整し、型寸法を設定する必要がある。
【００１９】
雌型としての可動金型４は、成形品のキャビティーを形成するとともに、上記可動枠型３を型締め方向に移動させる役割をもつ。要求される成形品の形状や上記の成形品基体の外周部１４の形状等を満足し、成形品を取り出すことが可能であれば、可動金型と可動枠型との分割面の位置は、適宜調整すればよい。
金型１内に供給される表皮材６の寸法は、可動枠型の仕切り壁２３等で折り返す長さや表皮材の伸び等を考慮して、適宜調整する必要がある。
【００２０】
これらの型表面は表皮材が摺動する際に、表皮材に傷が発生しない程度の表面加工がなされている。
表皮材の伸びが小さい場合や射出成形で完全に型締めしてから溶融樹脂を充填する場合には、表皮材の端部７をさらに円滑にキャビティー内に滑動させるために、図６に示すように固定金型面の一部３７が可動金型の方向に移動し、表皮材の端部７をそれと可動枠型の挟持面２９で挟持できるようにし、また、固定金型面の外周部側面部２２でキャビティー内に押し込むように表皮材６を滑動させる方法をとってもよい。この場合は、固定金型に固定金型の一部を移動できる手段も設ける必要がある。
【００２１】
また、図７に示すように固定金型面の外周部の一部が可動金型の方向に移動できる環状スライド３８構造を有し、型開き時には固定金型側に位置し、型締めに伴い表皮材の端部７を固定金型面の段差部側面２０と可動枠型の挟持面２９で挟持できるようにし、ついで、環状スライド３８を可動金型側に移動させながら、表皮材６をキャビティー内に押し込むように滑動させる方法をとってもよい。
【００２２】
場合によっては、図８に示すように可動枠型を分割型３９とし、可動金型に表皮材６を仮止めし、型締め時の可動金型４の移動とそれに伴い分割型を成形品基体の中心方向へ移動させ、表皮材の端部７を固定金型の段差部側面２０と可動枠型の分割型３９の側面で挟持できるようにする方法をとってもよい。この分割型３９と可動金型には、スライド面を設ける等の手段により、型締めに伴い分割型の成形品基体の中心方向への移動できる必要がある。
【００２３】
本発明の製造方法は、固定金型、可動金型及び固定金型の外周部を摺動する可動枠型でキャビティーを形成する製造用金型を用いて熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品を製造する方法において、以下を特徴とするものであり、その手順に従い説明する。
まず、射出成形の場合は以下のようにする。 （１）型開き時に表皮材をその端部がはみ出した状態で固定金型面に装着する。通常は真空吸着等の手段により固定金型に表皮材を仮止めする。
（２）可動金型と共に可動枠型を型締め方向に移動させ、型締めして、固定金型の段差部と可動枠型側面とで表皮材の端部を滑動可能に挟持する。
（３）固定金型面と表皮材の間に溶融樹脂を注入を開始する。樹脂圧力により表皮材は固定金型の段差部側面と可動枠型側面とによる挟持力に逆らってキャビティー内に引き込まれていく。さらに、表皮材の端部を可動枠型に突設された仕切り壁に沿って摺動させる。
（４）可動金型側面と可動枠型の仕切り壁の間に充填される溶融樹脂の圧力により表皮材の端部を成形品の裏面に向けて折り返えす。表皮材は溶融樹脂を包み込むようにして表皮材枠型及び可動金型の型面に押しつけられる。
（５）固定金型の段差部と可動枠型の仕切り壁の間に充填される溶融樹脂により表皮材の端部を隠蔽する。
（６）金型による溶融樹脂の冷却・固化を行った後、型を開いて、積層成形品を取り出す。
【００２４】
次に、射出圧縮成形、射出プレス成形等の場合は以下のようにする。
（１）型開き時に表皮材をその端部がはみ出した状態で固定金型上に装着する。通常は真空吸着等の手段により固定金型に表皮材を仮止めする。
（２）可動金型と共に可動枠型を型締め方向に移動させて、固定金型の段差部と可動枠型側面とで表皮材の端部付近を滑動可能に挟持する。
（３）圧縮代を残して型締めした時点で、固定金型面と表皮材の間へ溶融樹脂の注入を開始する。
（４）溶融樹脂の圧力により表皮材の端部を可動枠型に突設された仕切り壁に沿って摺動させる。
（５）溶融樹脂の注入完了の直前ないし直後に最終的な型締めを開始する。
（６）可動金型側面と可動枠型の仕切り壁の間に充填される溶融樹脂の圧力により表皮材の端部を成形品の裏面に向けて折り返す。表皮材は溶融樹脂を包み込むようにして表皮材枠型及び可動金型の型面に押しつけられる。
（７）固定金型の段差部と可動枠型の仕切り壁の間に充填される溶融樹脂により表皮材の端部を隠蔽する
（８）金型による溶融樹脂の冷却・固化を行った後、型を開いて、積層成形品を取り出す。
【００２５】
本発明の積層成形品は、表皮材と熱可塑性樹脂を一体成形した成形品であって、表皮材の端部を成形品の裏面に折り返し、それを熱可塑性樹脂で隠蔽したことを特徴とするものである。一体成形することにより、溶融状態の熱可塑性樹脂の熱が表皮材の裏打ち材や表皮材の裏面の一部を溶かし、お互いに溶着したり、表皮材の裏打ち材や表皮材の裏面の凹凸や穴に溶融状態の熱可塑性樹脂が進入し、強度な接着状態を得ることができる。さらに、表皮材の端部を折り返し、その中に樹脂を入れることで、その端部を強度に接着することができる。また、その端部を隠蔽するように樹脂を設けることで、成形品の外観を良好とすることができる。
【００２６】
本発明において、表皮材が表層材にクッション性のある基材を裏打ちしたものである場合、裏打ち材は前記のように強度な接着状態であり、成形品を金型から取り出し大気圧下にすれば、クッション性のある裏打ち材はその復元力で膨張し、その端部は図１に示すように仕切り壁部に相当した部分を埋め尽くし、外観良好な成形品を提供できる。
【００２７】
【実施例】
次に実施例によって、本発明をさらに具体的に説明する。
〔実施例〕椅子の座部品を、射出圧縮成形にて表皮材と一体成形する。
１．材料
表皮材：塩化ビニル表層材（厚み１．０ｍｍ）に発泡ウレタンのクッション材（厚み２０ｍｍ）を裏打ちした積層シート材
熱可塑性樹脂：ポリプロピレン（出光石油化学製：出光ポリプロＪ−９５０ＨＰ）
２．成形機
汎用横型射出成形機（三菱重工業製：型締力：８５０ｔｏｎ）に、射出圧縮成形機構を組み込んだ射出圧縮成形機（圧縮力は０〜１００％の範囲で調整可能）
３．金型
縦４４０ｍｍ、横４１０ｍｍの椅子の座部品を成形するためのキャビティ−とその中心付近にゲートを一点備えた金型で、固定金型、可動枠型及び可動金型で構成される。
可動枠型には、高さ１０ｍｍ、厚み３ｍｍの仕切り壁を有する。固定金型の段差は、深さ３ｍｍ、長さ１５ｍｍである。
【００２８】

Figure 0003565961
５．結果
表皮材の潰れやしわの発生がなく、また、成形品の外周部で表皮材が折り返され、かつ、表皮材の端部が樹脂で隠蔽された、外観の良好な製品が得られた。
【００２９】
【発明の効果】
以上に述べたような固定金型、可動枠型及び可動金型でキャビティーを形成する積層成形品用金型を用いることで、表皮材の端部を成形品の裏面に向けて折り返し、樹脂でその端部を隠蔽するようにした、外観の優れた積層成形品を提供することができる。
【図面の簡単な説明】
【図１】本発明の積層成形品の断面図を示す。
【図２】表皮材を金型に供給した時の金型主要部の断面図を示す。
【図３】型締めを開始し、表皮材を挟持した状態の金型主要部の断面図を示す。
【図４】所定位置まで型締めをし、溶融樹脂を充填中の金型主要部の断面図を示す。
【図５】溶融樹脂を充填後、型締めを完了した状態の金型主要部の断面図を示す。
【図６】固定金型面の一部が分割できる金型主要部の断面図を示す。
【図７】固定金型面の外周部が環状リングとなった金型主要部の断面図を示す。
【図８】表皮材枠型が分割型となった金型主要部の断面図を示す。
【符号の説明】
１・・・金型
２・・・固定金型
３・・・可動枠型
４・・・可動金型
５・・・キャビティー
６・・・表皮材
７・・・表皮材の端部
８・・・表皮材の表層材
９・・・表皮材の裏打ち材
１１・・・隠蔽部の樹脂
１２・・・積層成形品
１６・・・固定金型面
１７・・・固定金型面の段差部
２１・・・固定金型面の段差部端部面
２２・・・固定金型面の外周部側面部
２３・・・表皮材枠型の仕切り壁
２４・・・表皮材枠型の仕切り壁の基部面
２９・・・表皮材枠型の表皮材挟持面
３０・・・表皮材枠型の固定金型面側の表皮材挟持面端部
３７・・・固定金型面の一部（表皮材の摺動及び折り返し用）
３８・・・固定金型面の外周部の管状スライド
３９・・・表皮材枠型の分割型[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a laminated molded product comprising a skin material and a thermoplastic resin, wherein an end of the skin material is folded toward the back surface of the molded product, and the end is concealed by the resin. It relates to a laminated molded product. The molded article obtained by the present invention can be applied to office chairs, automobile interior parts, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a laminated molded product in which a surface material is integrated with a surface is known. By forming the molded product into a laminated structure, there is an advantage that a good appearance and cushioning property can be obtained by the surface skin material, and the texture of the surface of the molded product can be easily changed by changing only the skin material. . Such a molded article is formed by filling a molten resin onto a skin material such as a sheet or a film which is mounted in a cavity of a mold in advance.
[0003]
Conventionally, after trimming, it is necessary to bend the back surface of the molded product by hand after trimming, which is troublesome, productivity is low, and it has been difficult to fix the skin material when bent.
Japanese Patent Application Laid-Open No. 61-137714 discloses a method in which a dividing frame is provided on the outer periphery of a product on a female mold side, a skin material is sandwiched between the female mold and the dividing frame, and molten resin is filled into a cavity. A method is disclosed in which the end of the skin material is folded back by sliding in the inward direction of the tee. However, in the case of a skin material with a cushion material, there is a disadvantage that the cushion material is exposed at the end.
[0004]
Further, Japanese Patent Application Laid-Open No. 5-64825 discloses a method in which a slide core for folding an end of a skin material is provided in a mold, and the folded skin material is heated by a heater attached to the slide core and welded to a resin. I have. This also has disadvantages such as the cushion material being exposed at the end portions as in the above case, and the mold is complicated and expensive.
[0005]
[Problems to be solved by the invention]
The present invention provides a method and a mold for manufacturing a laminated molded product having excellent appearance by folding back the end of the skin material toward the back surface of the molded product and concealing the end with a resin. It is.
[0007]
[Means for Solving the Problems]
The first invention is a fixed mold, a movable mold opposed to the fixed mold , and, along with the movable mold , slides the outer peripheral surface of the fixed mold in the mold opening and closing directions of the movable mold. In a method for producing a laminated molded product in which a skin material is laminated on a surface of a base material made of a thermoplastic resin layer using a production mold that forms a cavity with a movable frame mold,
(1) At the time of opening the mold, the skin material is mounted on the fixed mold surface constituting the cavity of the fixed mold with the end protruding,
(2) the movable frame die is moved in the mold clamping direction together with the movable mold, and mold clamping, and the fixed mold the fixed mold surface peripheral portion formed stepped portion of the side surface of the movable frame die Slidably sandwich the end of the skin material with
(3) while injecting a molten resin between the stationary mold surface and the skin material, protruding from the end portion of the movable mold side of the side of the variable Dowaku type, the cavity of the movable mold The inner end of the skin material is slid by resin pressure along the partition wall disposed opposite to the cavity inside the cavity from the side surface to be formed ,
(4) the end of the skin material folded toward the back surface of the molded article by the pressure of the molten resin filled between the movable mold side and a movable frame type partition wall,
(5) An object of the present invention is to provide a method of manufacturing a laminated molded product, wherein an end portion of a skin material is concealed by a molten resin filled between a step portion of a fixed mold and a partition wall of a movable frame. .
[0008]
According to a second aspect of the present invention, a fixed mold, a movable mold opposed to the fixed mold , and the movable mold, together with the movable mold , slide on the outer peripheral surface of the fixed mold in a direction of opening and closing the movable mold. In a method for producing a laminated molded product in which a skin material is laminated on a surface of a base material made of a thermoplastic resin layer using a production mold that forms a cavity with a movable frame mold,
(1) At the time of opening the mold, the skin material is mounted on a fixed mold surface constituting the cavity of the fixed mold in a state where the end portion protrudes,
(2) together with the movable mold by moving the movable frame type mold clamping direction, of the skin material at a step portion formed on an outer peripheral portion of the fixed mold surface of the stationary mold and the side surface of the movable frame die Hold the end slidably,
(3) When the mold is clamped while leaving the compression allowance, the injection of the molten resin between the fixed mold surface and the skin material is started,
(4) projecting from the end portion of the movable mold side of the side of the variable Dowaku type, inside the cavity from the side surface forming the cavity of the movable mold, is disposed opposite with a gap Along the partition wall, the end of the skin material is slid by the pressure of the molten resin ,
(5) Immediately before or immediately after the completion of the injection of the molten resin, the final mold clamping is started,
(6) The end of the skin material is turned back toward the back surface of the molded product by the pressure of the molten resin filled between the side surface of the movable mold and the partition wall of the movable frame mold,
(7) An object of the present invention is to provide a method for manufacturing a laminated molded product, wherein an end portion of a skin material is concealed by a molten resin filled between a step portion of a fixed mold and a partition wall of a movable frame mold. .
[0009]
The third invention is a laminated molded article obtained by laminating a skin material on a surface of a substrate comprising a thermoplastic resin layer, the edge portion of the skin material is folded back toward the rear surface of the molded product, and a thermoplastic resin layer in in a mold for manufacturing a concealed laminated molded article, the stationary die, oppositely disposed movable mold to the fixed mold, and with the movable mold, secured to the mold opening and mold clamping direction of the movable mold A cavity is formed by a movable frame mold that slides on an outer peripheral surface of the mold, and the fixed mold is installed so that an end of the skin material protrudes, and a fixed mold surface that forms the cavity. And a step formed on an outer peripheral portion of the fixed mold surface and forming a cavity portion filled with a resin that covers an end portion of the skin material. The movable frame mold has a side surface of the step portion. Together with a side surface for holding the end of the skin material, A partition wall that protrudes from an end of the movable mold side and that folds an end of the skin material, wherein the partition wall has a cavity more than a side surface that forms the cavity of the movable mold. It is an object of the present invention to provide a mold for producing a laminated molded product, which is disposed to face the inside of the tee with a gap .
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention is directed to a laminated molded product using a skin material formed by injection molding, injection compression molding, injection press molding, or the like of a thermoplastic resin. For example, there are office chairs and woven automobile seats having a cushioning surface, automobile door trims and instrument panels, and the like.
[0012]
As shown in FIG. 1, the laminated molded article obtained by laminating the skin material on the surface of the base material comprising the thermoplastic resin layer of the present invention has an end portion of the skin material folded back toward the back surface of the molded article, A laminated molded article characterized by being concealed by a resin layer.
In the present invention, a skin material, a thermoplastic resin, a molding machine, a mold, and a manufacturing method as described below can be employed.
[0013]
As the target skin material, a thermoplastic resin sheet, a woven fabric, a nonwoven fabric, a laminated sheet in which a foam or a thermoplastic resin is lined with a surface material made of a vinyl chloride resin, an olefin-based elastomer, a woven fabric, a nonwoven fabric, or the like are used. A skin material that can be adopted and has cushioning properties is preferable.
Examples of the thermoplastic resin include thermoplastic resins such as polypropylene, polystyrene, polyethylene, ABS, polycarbonate, and polyamide, and elastomers such as ethylene-α-olefin copolymer elastomer, talc, mica, and the like. What added inorganic fillers, such as calcium carbonate, glass fiber, and carbon fiber, can be adopted.
[0014]
The molding machine that can be used in the present invention can be equipped with the following molds, and any injection molding machine, injection compression molding machine, injection press molding machine or the like for thermoplastic resin may be used as long as the function can be fulfilled.
The mold of the present invention has a structure in which a cavity is formed by a fixed mold, a movable mold, and a movable frame mold that slides around the outer periphery of the fixed mold. This will be described below with reference to FIGS.
[0015]
The fixed mold 2 as a male mold has a step 17 on the side surface of the outer periphery of the fixed mold surface corresponding to the back surface of the molded product. As can be seen from FIGS. 4 and 5, the step portion holds the end portion 7 of the skin material between the side surface 20 of the step portion of the fixed mold and the skin material holding surface 29 corresponding to the side surface of the movable frame mold 3. The skin material 6 needs to be able to slide under the pressure of the molten resin 10 charged from a molding machine (not shown) between the material 6 and the fixed mold surface 16. The step 17 is filled with the molten resin 10 and forms a cavity of the resin 11 that conceals the end 7 of the skin material when completely closed. It is necessary to appropriately adjust the step depth 18 depending on the thickness and the material of the skin material 6 so that the resin has sufficient strength to hold at least the resin 11 of the concealing portion on the molded article base 13 made of the resin. In the case of the cushioning skin material, the thickness is set to be at least smaller than the thickness of the skin material 6 so that the vicinity of the end 7 of the skin material can be sandwiched between the movable frame type skin material holding surface 29. Further, the step portion length 19 needs to cover at least the end 7 of the skin material. Further, when the mold clamping is completed, the distance between the end surface 21 and the fixed mold surface 16 in the moving direction of the mold is determined by the distance between the base surface 24 of the partition wall of the movable frame mold and the fixed mold surface 16 at the time of mold clamping. It is preferable that the distance is set to be shorter than the distance in the moving direction of the mold. Thereby, the resin 11 that covers the end of the skin material does not protrude from the skin material on the outer peripheral portion of the molded product, and is preferable in appearance.
[0016]
Further, the fixed mold surface 16 may be provided with a needle for temporarily fixing the skin material 6, or a vacuum suction hole and an auxiliary device therefor.
The movable frame mold 3 is installed or connected to the fixed mold 2 and / or the movable mold 4 so as to be movable in the mold opening and mold closing directions. When the mold is opened, the fixed mold facing surface 27 of the movable frame mold is preferably separated from the fixed mold surface 16 in the moving direction of the mold so that the skin material 6 can be easily mounted on the fixed position of the mold 1. Therefore, it is preferable that the movable frame mold 3 has a means for driving the movable frame mold 3 so as to be separated from the fixed mold 2 as the mold is opened. For example, the movable frame mold 3 is provided on a sliding bearing portion 32 of a fixed mold, and can be moved in a mold opening and mold clamping direction by a tension ring 35 connected to a spring 34 provided on the sliding shaft 33 and the fixed mold 2. To do. Further, a device that can move the movable frame mold 3 by a hydraulic mechanism or the like may be provided.
[0017]
It is preferable to provide a taper at the end 30 of the skin material holding surface on the fixed mold surface side of the movable frame so that the skin material 6 is not scratched or torn and can be held smoothly.
A partition wall 23 is protruded from an end portion 31 of the skin material holding surface on the movable mold surface side of the movable frame type. As described above, this partition wall 23 is formed between the skin material holding surface and the outer peripheral side surface of the fixed mold surface by the pressure of the molten resin 10 in which the skin material 6 is filled between the skin material 6 and the fixed mold surface 16. When the end of the skin material is concealed by the resin when the mold clamping is completed, the shape is such that the skin material 6 can be slid and folded back, and the end 7 can be concealed by the resin. Must have surface properties. In order to smoothly slide the skin material, it is preferable that the radius of curvature is large and the thickness of the partition wall 25 is large. To conceal the end 7 of the skin material with resin and improve the appearance, the partition wall is preferable. Since the thickness 25 is preferably small and the height 26 is preferably high, it is necessary to appropriately adjust the shape of the partition wall according to the thickness and type of the skin material.
[0018]
The movable frame-type partition wall 23 and the vicinity of the base surface 24 are portions corresponding to the outer peripheral portion 14 of the molded article base body in which the skin material 6 is folded and resin is filled therein. The shape of the outer peripheral portion 14 of the molded article base is determined by the cavity formed by the partition wall 23, the movable mold facing surface 28 of the movable frame mold, and the product surface 36 of the movable mold. It is necessary to adjust the thickness 15 of the outer peripheral portion of the molded article substrate and to set the mold dimensions in consideration of the strength and shape to be performed, the thickness of the skin material, and the like.
[0019]
The movable mold 4 as a female mold has a role of forming a cavity of a molded product and moving the movable frame mold 3 in a mold clamping direction. If the shape of the required molded article and the shape of the outer peripheral portion 14 of the molded article base are satisfied and the molded article can be taken out, the position of the dividing surface between the movable mold and the movable frame mold is What is necessary is just to adjust suitably.
It is necessary to appropriately adjust the dimensions of the skin material 6 supplied into the mold 1 in consideration of the length of the movable frame-shaped partition wall 23 and the like, the length of the skin material, and the like.
[0020]
The surface of these molds is processed so that the skin material is not damaged when the skin material slides.
When the elongation of the skin material is small or when the molten resin is filled after the mold is completely closed by injection molding, the end portion 7 of the skin material is further smoothly slid into the cavity as shown in FIG. As described above, a part 37 of the fixed mold surface moves in the direction of the movable mold so that the end portion 7 of the skin material can be sandwiched between the end portion 7 and the clamping surface 29 of the movable frame mold. A method may be adopted in which the skin material 6 is slid so as to be pushed into the cavity by the side surface portion 22. In this case, it is necessary to provide a means for moving a part of the fixed mold in the fixed mold.
[0021]
Further, as shown in FIG. 7, a part of the outer peripheral portion of the fixed mold surface has an annular slide 38 structure capable of moving in the direction of the movable mold. The end portion 7 of the skin material can be held between the side surface 20 of the step portion of the fixed mold surface and the holding surface 29 of the movable frame type. Then, while moving the annular slide 38 toward the movable mold side, the skin material 6 is held in the cabinet. A method of sliding the tee into the tee may be adopted.
[0022]
In some cases, as shown in FIG. 8, the movable frame mold is a split mold 39, the skin material 6 is temporarily fixed to the movable mold, and the movable mold 4 is moved at the time of mold clamping, and the split mold is moved along with the movement of the split mold. May be moved in the center direction to allow the end 7 of the skin material to be held between the side surface 20 of the step portion of the fixed mold and the side surface of the split mold 39 of the movable frame type. It is necessary that the divided mold 39 and the movable mold can be moved in the center direction of the molded product base of the divided mold with the clamping by means such as providing a slide surface.
[0023]
The manufacturing method of the present invention is a method for forming a base made of a thermoplastic resin layer using a manufacturing die for forming a cavity with a fixed mold, a movable mold and a movable frame mold that slides around the outer periphery of the fixed mold. A method for producing a laminated molded product having a surface material laminated on the surface is characterized by the following, and will be described according to the procedure.
First, in the case of injection molding, the following is performed. (1) At the time of opening the mold, the skin material is mounted on the fixed mold surface with its end protruding. Usually, the skin material is temporarily fixed to the fixed mold by means such as vacuum suction.
(2) The movable frame mold is moved together with the movable mold in the mold clamping direction, the mold is clamped, and the end of the skin material is slidably held between the stepped portion of the fixed mold and the movable frame mold side surface.
(3) Inject molten resin between the fixed mold surface and the skin material. Due to the resin pressure, the skin material is drawn into the cavity against the holding force between the side surface of the step portion of the fixed mold and the side surface of the movable frame. Further, the end of the skin material is slid along a partition wall projecting in a movable frame shape.
(4) The end of the skin material is folded back toward the back surface of the molded product by the pressure of the molten resin filled between the movable mold side surface and the movable frame mold partition wall. The skin material is pressed against the mold surfaces of the skin material frame mold and the movable mold so as to wrap the molten resin.
(5) The end of the skin material is concealed by the molten resin filled between the step portion of the fixed mold and the partition wall of the movable frame mold.
(6) After the molten resin is cooled and solidified by the mold, the mold is opened and the laminated molded product is taken out.
[0024]
Next, in the case of injection compression molding, injection press molding, or the like, the following is performed.
(1) At the time of opening the mold, the skin material is mounted on the fixed mold with its end protruding. Usually, the skin material is temporarily fixed to the fixed mold by means such as vacuum suction.
(2) The movable frame mold is moved together with the movable mold in the mold clamping direction, and the vicinity of the end of the skin material is slidably held between the step portion of the fixed mold and the movable frame mold side surface.
(3) At the time when the mold is clamped while leaving the compression allowance, the injection of the molten resin is started between the fixed mold surface and the skin material.
(4) The end of the skin material is slid along the partition wall projecting in a movable frame shape by the pressure of the molten resin.
(5) Immediately before or immediately after the completion of the injection of the molten resin, final mold clamping is started.
(6) The end of the skin material is turned back toward the back surface of the molded product by the pressure of the molten resin filled between the movable mold side surface and the movable frame mold partition wall. The skin material is pressed against the mold surfaces of the skin material frame mold and the movable mold so as to wrap the molten resin.
(7) The edge of the skin material is concealed by the molten resin filled between the step portion of the fixed mold and the partition wall of the movable frame mold. (8) After the molten resin is cooled and solidified by the mold, Open the mold and take out the laminated molded product.
[0025]
The laminated molded article of the present invention is a molded article obtained by integrally molding a skin material and a thermoplastic resin, wherein an end portion of the skin material is folded back on the back surface of the molded article, and it is concealed by the thermoplastic resin. Things. By integrally molding, the heat of the thermoplastic resin in the molten state melts a part of the backing material of the skin material and a part of the back surface of the skin material and welds each other, and the unevenness of the backing material of the skin material and the back surface of the skin material The molten thermoplastic resin enters the holes, and a strong adhesive state can be obtained. Further, by folding the end of the skin material and putting the resin therein, the end can be strongly bonded. Further, by providing a resin so as to cover the end portion, the appearance of the molded product can be improved.
[0026]
In the present invention, when the skin material is a material in which the surface layer material is backed with a cushioning base material, the backing material is in a strong adhesive state as described above, and the molded product is taken out of the mold and slid under atmospheric pressure. For example, the cushioning backing material expands due to its restoring force, and its ends fill up the portions corresponding to the partition walls as shown in FIG. 1, so that a molded article having a good appearance can be provided.
[0027]
【Example】
Next, the present invention will be described more specifically with reference to examples.
[Example] A seat part of a chair is integrally formed with a skin material by injection compression molding.
1. Material Skin material: Laminated sheet material in which a polyurethane foam cushion material (thickness: 20 mm) is lined with a vinyl chloride surface material (thickness: 1.0 mm) Thermoplastic resin: Polypropylene (made by Idemitsu Petrochemical: Idemitsu Polypro J-950HP)
2. Injection compression molding machine that incorporates an injection compression molding mechanism into a general-purpose horizontal injection molding machine (Mitsubishi Heavy Industries: mold clamping force: 850 ton) (compression force can be adjusted in the range of 0 to 100%)
3. A mold having a cavity for molding a chair part of a chair having a length of 440 mm and a width of 410 mm and a gate near the center of the cavity, comprising a fixed mold, a movable frame mold and a movable mold.
The movable frame type has a partition wall having a height of 10 mm and a thickness of 3 mm. The step of the fixed mold has a depth of 3 mm and a length of 15 mm.
[0028]
Figure 0003565961
5. Result A product with good appearance was obtained, in which no crushing or wrinkling of the skin material occurred, and the skin material was folded back at the outer peripheral portion of the molded product, and the edge of the skin material was concealed by the resin.
[0029]
【The invention's effect】
By using the fixed mold, the movable frame mold, and the mold for the laminated molded article that forms the cavity with the movable mold as described above, the end of the skin material is folded toward the back surface of the molded article, and the resin is formed. Thus, it is possible to provide a laminated molded article having an excellent appearance in which the end is concealed.
[Brief description of the drawings]
FIG. 1 shows a sectional view of a laminated molded product of the present invention.
FIG. 2 is a sectional view of a main part of a mold when a skin material is supplied to the mold.
FIG. 3 is a cross-sectional view of a main part of the mold in a state where mold clamping is started and a skin material is sandwiched.
FIG. 4 is a cross-sectional view of a main part of a mold in which a mold is clamped to a predetermined position and a molten resin is being filled.
FIG. 5 is a cross-sectional view of a main part of a mold in a state where mold clamping is completed after filling a molten resin.
FIG. 6 is a sectional view of a main part of a mold in which a part of a fixed mold surface can be divided.
FIG. 7 is a sectional view of a main part of a mold in which an outer peripheral portion of a fixed mold surface is an annular ring.
FIG. 8 is a cross-sectional view of a main part of a mold in which a skin material frame mold is a split mold.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mold 2 ... Fixed mold 3 ... Movable frame mold 4 ... Movable mold 5 ... Cavity 6 ... Skin material 7 ... End 8 of skin material ..Surface material 9 of the skin material 9 Backing material 11 of the skin material 11 Resin of the concealing part 12 Laminate molded product 16 Fixed mold surface 17 Step portion of the fixed mold surface Reference numeral 21 denotes a step end surface of the fixed mold surface 22... An outer peripheral side surface portion 23 of the fixed mold surface 23... A skin material frame type partition wall 24. Base surface 29 ... Skin material frame-type skin material holding surface 30 ... Skin material frame type fixed mold surface side skin material holding surface end 37 ... Part of fixed mold surface (Skin material) For sliding and folding back)
38: a tubular slide on the outer periphery of the fixed mold surface 39: a split type of a skin material frame type

Claims (3)

固定金型、この固定金型に対向配置された可動金型、及びこの可動金型とともに、可動金型の型開き及び型締め方向に固定金型の外周面を摺動する可動枠型でキャビティーを形成する製造用金型を用いて熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品を製造する方法において、
（１）型開き時に表皮材をその端部がはみ出した状態で前記固定金型のキャビティーを構成する固定金型面に装着し、
（２）可動金型と共に可動枠型を型締め方向に移動させ、型締めして、前記固定金型の前記固定金型面の外周部に形成された段差部と前記可動枠型の側面とで表皮材の端部を滑動可能に挟持し、
（３）固定金型面と表皮材の間に溶融樹脂を注入しながら、可動枠型の前記側面の前記可動金型側の端部に突設され、前記可動金型の前記キャビティーを形成する側面よりもキャビティー内側に、隙間を空けて対向配置された仕切り壁に沿って、樹脂圧力により表皮材の端部を摺動させ、
（４）可動金型の側面と可動枠型の仕切り壁との間に充填される溶融樹脂の圧力により表皮材の端部を成形品の裏面に向けて折り返し、
（５）固定金型の段差部と可動枠型の仕切り壁の間に充填される溶融樹脂により表皮材の端部を隠蔽することを特徴とする積層成形品の製造方法。A fixed mold, a movable mold opposed to the fixed mold , and a movable frame mold that slides on the outer peripheral surface of the fixed mold in the mold opening and closing directions together with the movable mold. In a method for producing a laminated molded product in which a skin material is laminated on the surface of a base material made of a thermoplastic resin layer using a production mold for forming a tee,
(1) At the time of opening the mold, the skin material is mounted on the fixed mold surface constituting the cavity of the fixed mold with the end protruding,
(2) the movable frame die is moved in the mold clamping direction together with the movable mold, and mold clamping, and the fixed mold the fixed mold surface peripheral portion formed stepped portion of the side surface of the movable frame die Slidably sandwich the end of the skin material with
(3) while injecting a molten resin between the stationary mold surface and the skin material, protruding from the end portion of the movable mold side of the side of the variable Dowaku type, the cavity of the movable mold The inner end of the skin material is slid by resin pressure along the partition wall disposed opposite to the cavity inside the cavity from the side surface to be formed ,
(4) the end of the skin material folded toward the back surface of the molded article by the pressure of the molten resin filled between the movable mold side and a movable frame type partition wall,
(5) A method for manufacturing a laminated molded product, wherein an end of a skin material is concealed by a molten resin filled between a step portion of a fixed mold and a partition wall of a movable frame mold. 固定金型、この固定金型に対向配置された可動金型、及びこの可動金型とともに、可動金型の型開き及び型締め方向に固定金型の外周面を摺動する可動枠型でキャビティーを形成する製造用金型を用いて熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品を製造する方法において、
（１）型開き時に表皮材をその端部がはみ出した状態で前記固定金型の前記キャビティーを構成する固定金型面に装着し、
（２）可動金型と共に可動枠型を型締め方向に移動させて、前記固定金型の前記固定金型面の外周部に形成された段差部と前記可動枠型の側面とで表皮材の端部を滑動可能に挟持し、
（３）圧縮代を残して型締めした時点で、固定金型面と表皮材の間へ溶融樹脂の注入を開始し、
（４）可動枠型の前記側面の前記可動金型側の端部に突設され、前記可動金型の前記キャビティーを形成する側面よりもキャビティー内側に、隙間を空けて対向配置された仕切り壁に沿って、溶融樹脂の圧力により表皮材の端部を摺動させ、
（５）溶融樹脂の注入完了の直前ないし直後に最終的な型締めを開始し、
（６）可動金型の側面と可動枠型の仕切り壁の間に充填される溶融樹脂の圧力により表皮材の端部を成形品の裏面に向けて折り返し、
（７）固定金型の段差部と可動枠型の仕切り壁の間に充填される溶融樹脂により表皮材の端部を隠蔽することを特徴とする積層成形品の製造方法。A fixed mold, a movable mold opposed to the fixed mold , and a movable frame mold that slides on the outer peripheral surface of the fixed mold in the mold opening and closing directions together with the movable mold. In a method for producing a laminated molded product in which a skin material is laminated on the surface of a base material made of a thermoplastic resin layer using a production mold for forming a tee,
(1) At the time of opening the mold, the skin material is mounted on a fixed mold surface constituting the cavity of the fixed mold in a state where the end portion protrudes,
(2) together with the movable mold by moving the movable frame type mold clamping direction, of the skin material at a step portion formed on an outer peripheral portion of the fixed mold surface of the stationary mold and the side surface of the movable frame die Hold the end slidably,
(3) When the mold is clamped while leaving the compression allowance, the injection of the molten resin between the fixed mold surface and the skin material is started,
(4) projecting from the end portion of the movable mold side of the side of the variable Dowaku type, inside the cavity from the side surface forming the cavity of the movable mold, is disposed opposite with a gap Along the partition wall, the end of the skin material is slid by the pressure of the molten resin ,
(5) Immediately before or immediately after the completion of the injection of the molten resin, the final mold clamping is started,
(6) The end of the skin material is turned back toward the back surface of the molded product by the pressure of the molten resin filled between the side surface of the movable mold and the partition wall of the movable frame mold,
(7) A method of manufacturing a laminated molded product, wherein an end of a skin material is concealed by a molten resin filled between a step portion of a fixed mold and a partition wall of a movable frame mold. 熱可塑性樹脂層からなる基材の表面に表皮材を積層した積層成形品であり、表皮材の端部が成形品の裏面に向けて折り返され、かつ、熱可塑性樹脂層で隠蔽された積層成形品を製造する金型において、
固定金型、この固定金型に対向配置された可動金型、及びこの可動金型とともに、可動金型の型開き及び型締め方向に固定金型の外周面を摺動する可動枠型でキャビティーを形成し、
前記固定金型は、前記表皮材の端部がはみ出すように設置されるとともに、前記キャビティーを形成する固定金型面と、この固定金型面の外周部に形成され、表皮材の端部を隠蔽する樹脂が充填されるキャビティー部分を構成する段差部とを備え、
前記可動枠型は、前記段差部の側面とともに、前記表皮材の端部を挟持する側面と、この側面の前記可動金型側の端部に突設され、前記表皮材の端部を折り返すための仕切り壁とを有し、
前記仕切り壁は、前記可動金型の前記キャビティーを形成する側面よりもキャビティー 内側に隙間を空けて対向配置されることを特徴とする積層成形品の製造用金型。 A laminated molded article obtained by laminating a skin material on a surface of a substrate comprising a thermoplastic resin layer, the edge portion of the skin material is folded back toward the rear surface of the molded product, and laminate molding, which is concealed in the thermoplastic resin layer In the mold that manufactures the product ,
A fixed mold, a movable mold opposed to the fixed mold, and a movable frame mold that slides on the outer peripheral surface of the fixed mold in the mold opening and closing directions together with the movable mold. Forming a tee,
The fixed mold is installed so that an end of the skin material protrudes, and a fixed mold surface forming the cavity and an outer peripheral portion of the fixed mold surface are formed, and an end of the skin material is formed. And a step portion forming a cavity portion filled with a resin for concealing ,
The movable frame mold, together with the side surface of the step portion, a side surface that sandwiches an end of the skin material, and is protruded from an end of the side surface on the movable mold side to fold an end of the skin material. Having a partition wall,
The mold for manufacturing a laminated molded product, wherein the partition wall is arranged to face the side of the movable mold that forms the cavity with a space inside the cavity with a gap therebetween .
JP29232295A 1995-11-10 1995-11-10 Manufacturing method and mold for manufacturing laminated molded products Expired - Fee Related JP3565961B2 (en)

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