JP3554503B2 - Molding equipment for resin parts - Google Patents

Molding equipment for resin parts Download PDF

Info

Publication number
JP3554503B2
JP3554503B2 JP7975099A JP7975099A JP3554503B2 JP 3554503 B2 JP3554503 B2 JP 3554503B2 JP 7975099 A JP7975099 A JP 7975099A JP 7975099 A JP7975099 A JP 7975099A JP 3554503 B2 JP3554503 B2 JP 3554503B2
Authority
JP
Japan
Prior art keywords
cavity
resin
gas
main portion
overflow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP7975099A
Other languages
Japanese (ja)
Other versions
JP2000271965A (en
Inventor
慶也 仁井名
匡太郎 吉井
潤一 井上
弘 郷原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Lock Manufacturing Co Ltd
Original Assignee
Honda Lock Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Lock Manufacturing Co Ltd filed Critical Honda Lock Manufacturing Co Ltd
Priority to JP7975099A priority Critical patent/JP3554503B2/en
Priority to US09/532,947 priority patent/US6371747B1/en
Priority to GB0107146A priority patent/GB2360486B/en
Priority to GB0006950A priority patent/GB2350316B/en
Priority to CN00108361A priority patent/CN1119223C/en
Publication of JP2000271965A publication Critical patent/JP2000271965A/en
Application granted granted Critical
Publication of JP3554503B2 publication Critical patent/JP3554503B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1711—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3029—Handgrips

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (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、射出ゲートに一端を連ならせて略直線状に延びるキャビティ主部を含むキャビティを型閉じ状態で形成する複数の金型と、前記射出ゲートからの所定量の溶融樹脂の射出完了後に少なくとも前記キャビティ主部内に前記一端側からガスを充填することを可能としたガス充填ノズルとを備え、前記キャビティ主部に対応した形状に形成される部品主部を含むとともに前記ガスの充填による空洞部を有した樹脂製部品を、前記キャビティに対応した形状に成形する樹脂製部品の金型成形装置に関する。
【０００２】
【従来の技術】
従来、かかる金型成形装置では、射出ゲートからの所定量の溶融樹脂の射出完了後に少なくともキャビティ主部内にその一端側からガスを充填することにより、少なくとも部品主部内を中空とした樹脂製部品を成形するようにしているが、キャビティ主部の他端部は閉塞端となっており、ガスの充填に伴なう溶融樹脂の逃げ場がないことに起因して、成形完了後の樹脂製部品における部品主部の他端部では部分的に厚肉部が生じ、引けの発生により商品性が低下してしまうことがある。
【０００３】
【発明が解決しようとする課題】
そこで、上記従来の金型成形装置で生じていた引けの発生を防止すべく、キャビティ主部の他端に通じたオーバーフロー部に、キャビティ主部からの余分な溶融樹脂を逃がすようにした金型成形装置も実現されており、このものでは、成形完了後の樹脂製部品における部品主部の他端部で部分的に厚肉部が生じることを防止することができる。しかるに、前記オーバーフロー部に充填ガスの一部も逃げることになり、樹脂製部品の成形完了後にオーバーフロー部に対応した余剰部分を樹脂製部品から除去すると、キャビティ主部の他端部にオーバーフロー部にガスの一部が逃げたことによる貫通孔が生じてしまい、その貫通孔を塞ぐための処理を施す必要が生じる。この結果、上記処理の分だけ手間がかかることになり、貫通孔を塞いだ後の外観意匠性も劣ってしまう。
【０００４】
本発明は、かかる事情に鑑みてなされたものであり、余分な後処理を不要とするとともに樹脂製部品の外観意匠性を優れたものとし得るようにした樹脂製部品の金型成形装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載の発明は、射出ゲートに一端を連ならせて略直線状に延びるキャビティ主部を含むキャビティを型閉じ状態で形成する複数の金型と、前記射出ゲートからの所定量の溶融樹脂の射出完了後に少なくとも前記キャビティ主部内に前記一端側からガスを充填することを可能としたガス充填ノズルとを備え、前記キャビティ主部に対応した形状に形成される部品主部を含むとともに前記ガスの充填による空洞部を有した樹脂製部品を、前記キャビティに対応した形状に成形する樹脂製部品の金型成形装置において、前記各金型のうち前記キャビティ主部の他端部を形成する一対の金型間に、キャビティ主部からの余分な溶融樹脂を逃がすためのオーバーフロー部と、キャビティ主部の他端およびオーバーフロー部間を結ぶフィルムゲートとが形成され、キャビティ主部内へ充填されたガスがフィルムゲートからオーバーフロー部に逃げることのないように、該フィルムゲートに対応する部分で前記両金型間の間隔が１．５ｍｍ以下に設定されることを特徴とする。
【０００６】
このような構成によれば、キャビティ主部からの余分な溶融樹脂がキャビティ主部の他端からオーバーフロー部に逃がされることになり、成形完了後の樹脂製部品における部品主部の他端部で部分的に厚肉部が生じることを防止して、引けの発生による商品性の低下を防止することができる。しかもキャビティ主部の他端およびオーバーフロー部間はフィルムゲートを介して結ばれており、そのフィルムゲートに対応する部分で両金型間の間隔が１．５ｍｍ以下であるときには、フィルムゲートからオーバーフロー部にガスが逃げることはないことを本発明者が実験で確かめている。したがって、樹脂製部品の成形完了後にフィルムゲートのキャビティ主部側の端部を切断してフィルムゲートおよびオーバーフロー部に対応した余剰部分を樹脂製部品から除去したときに、部品主部の他端部に貫通孔が生じてしまうことはなく、貫通孔を塞ぐための後処理を施すことを不要として余分な手間を省くことができるとともに、切断後の外観意匠性が劣ってしまうこともない。
【０００７】
また請求項２記載の発明は、上記請求項１記載の発明の構成に加えて、前記樹脂製部品は、一側面を意匠面とした部品主部と、該部品主部の他端部から意匠面とは反対側に突出する突部とを一体に備え、前記オーバーフロー部およびフィルムゲートは、前記部品主部の意匠面を形成する金型と、該意匠面および前記突部間で部品主部の他端に開口する肉抜き部を形成する他の金型との間に形成されることを特徴とし、かかる構成によれば、肉抜き部を形成する金型と、部品主部の意匠面を形成する金型との間を狭くして、キャビティ主部の他端部における溶融樹脂および前記ガスの流通方向に沿って前記フィルムゲートの上流側でガスの流通面積を絞ることができ、フィルムゲートからオーバーフロー部へのガスの流通をより一層効果的に遮断することができる。しかも一側面を意匠面とした部品主部の他端部には、意匠面とは反対側に突出する突部が一体に連設されるので、前記肉抜き部の形成により、部品主部の他端部の肉厚が過度に薄くなることはない。
【０００８】
【発明の実施の形態】
以下、本発明の実施の形態を、添付の図面に示した本発明の一実施例に基づいて説明する。
【０００９】
図１〜図３は本発明の一実施例を示すものであり、図１は車両用アウトドアハンドルの縦断面図、図２は型閉じ状態にある金型成形装置の縦断面図、図３は図２の３矢示部拡大図である。
【００１０】
先ず図１において、この樹脂製部品は、車両用ドアの外面側に設けられるアウトドアハンドル５であり、このアウトドアハンドル５は、一側面を意匠面５ａ１ として略直線状に延びる部品主部としてのハンドル主部５ａと、該ハンドル主部５ａの長手方向一端側で前記意匠面５ａ１ とは反対側に臨む他側面５ａ２ から前記意匠面５ａ１ とは反対側に突出する略Ｌ字状の第１突部５ｂと、前記ハンドル主部５ａの長手方向他端側で前記他側面５ａ２ から前記意匠面５ａ１ とは反対側に突出する第２突部５ｃとを一体に有した合成樹脂製のものであり、第１突部５ｂの一部およびハンドル主部５ａ内にはガスの充填による空洞部６が形成される。
【００１１】
前記第１突部５ｂは車両用ドアに回動支持され、前記第２突部５ｃは、車両用ドアのロック装置に連結される。
【００１２】
このようなアウトドアハンドル５は、図２で示す金型成形装置で成形されるものであり、この金型成形装置は、型閉じ状態でアウトドアハンドル５の形状に対応したキャビティ７を形成する複数たとえば第１〜第５金型８，９，１０，１１，１２と、前記空洞部６を形成するためのガスを前記キャビティ７に充填するガス充填ノズル１３とを備える。
【００１３】
前記キャビティ７は、ハンドル主部５ａに対応して略直線状に延びるキャビティ主部７ａの長手方向一端部に第１突部５ｂに対応した第１突部形成部７ｂが連通するとともに、前記キャビティ主部７ａの長手方向他端部に第２突部５ｃに対応した第２突部形成部７ｃが連通するものであり、第２および第３金型８，９間に、第１突部形成部７ｂに連なる射出ゲート１４が形成される。すなわち射出ゲート１４は、第１突部形成部７ｂを介してキャビティ主部７ａの長手方向一端部に連なることになり、前記射出ゲート１４からキャビティ７に所定量の溶融樹脂が射出される。
【００１４】
また第１〜第５金型８〜１２のうちキャビティ主部７ａの他端部を形成する第１および第５金型８，１２間に、キャビティ主部７ａからの余分な溶融樹脂を逃がすためのオーバーフロー部１５と、キャビティ主部７ａの他端およびオーバーフロー部１５間を結ぶフィルムゲート１６とが形成され、該フィルムゲート１６に対応する部分で第１および第５金型８，１２間の間隔Ｌが１．５ｍｍ以下に設定される。
【００１５】
しかも第１金型８が、ハンドル主部５ａの意匠面５ａ１ を形成する金型であるのに対して、第５金型１２は、該意匠面５ａ１ および第２突部５ｃ間でハンドル主部５ａの他端に開口する肉抜き部１７（図１参照）を形成することになる。
【００１６】
図３を併せて参照して、ガス充填ノズル１３は、その先端に設けられるガス充填口１８を、アウトドアハンドル５内の空洞部６に対応する位置に配置するようにしてキャビティ７内に突入される。
【００１７】
第１〜第５金型８〜１２のうちキャビティ７の一端部他側面５ａ２ に対応した第２金型９において前記射出ゲート１４の近傍位置には、キャビティ７内に通じる挿入孔１９が設けられ、ガス充填ノズル１３は該挿入孔１９に挿入される。
【００１８】
しかもガス充填ノズル１３の先端部には、挿入孔１９に嵌合される大径円筒部２０と、キャビティ７側に臨む環状の段部２１を前記大径円筒部２０との間に形成して該大径円筒部２０の先端に同軸に連なる小径円筒部２２と、小径円筒部２２よりも小径にして小径円筒部２２の先端に同軸に連なる円筒状のノズル部２３とが設けられており、ノズル部２３の先端にガス充填口１８が開口される。
【００１９】
ところで、ガス充填ノズル１３内には冷却水の流通路（図示せず）が設けられており、溶融樹脂に接触するガス充填ノズル１３の先端部が過熱状態となることはない。
【００２０】
このような金型成形装置によれば、アウトドアハンドル５の成形完了後には、第１突部５ｂから一体に突出する被封孔処理筒２４が、ガス充填ノズル１３の先端部と第２金型９との間で円筒状に形成されることになる。すなわち、被封孔処理筒２４は、小径円筒部２２の外面および段部２１で規定される外面形状ならびに挿入孔１９のキャビティ７側内面で規定される内面形状を有した円筒状に形成されるものであり、アウトドアハンドル５の成形完了後に該被封孔処理筒２４の外端開口部は、一部を被封孔処理筒２４内に嵌合せしめた合成樹脂製の蓋部材２５を被封孔処理筒２４の外端面に溶着する等の封孔処理により閉じられる。
【００２１】
次にこの実施例の作用について説明すると、アウトドアハンドル５を成形するための第１〜第５金型８〜１２のうちキャビティ主部７ａの他端部を形成する第１および第５金型８，１２間に、キャビティ主部７ａからの余分な溶融樹脂を逃がすためのオーバーフロー部１５と、キャビティ主部７ａの他端およびオーバーフロー部１５間を結ぶフィルムゲート１６とが形成されるので、キャビティ主部７ａからの余分な溶融樹脂がキャビティ主部７ａの他端からオーバーフロー部１５に逃がされることになり、成形完了後のアウトドアハンドル５におけるハンドル主部５ａの他端部で部分的に厚肉部が生じることを防止して、引けの発生による商品性の低下を防止することができる。
【００２２】
しかもフィルムゲート１６に対応する部分で第１および第５金型８，１２間の間隔Ｌが１．５ｍｍ以下に設定されており、前記間隔Ｌが１．５ｍｍ以下であるときには、フィルムゲート１６からオーバーフロー部１５にガスが逃げることはないことを本発明者が実験で確かめている。したがって、アウトドアハンドル５の成形完了後に、フィルムゲート１６のキャビティ主部７ａ側の端部を切断してフィルムゲート１６およびオーバーフロー部１５に対応した余剰部分をアウトドアハンドル５から除去したときに、ハンドル主部５ａの他端部に貫通孔が生じてしまうことはなく、貫通孔を塞ぐための処理を施すことを不要として余分な手間を省くことができ、切断後の外観意匠性が劣ってしまうこともない。
【００２３】
またアウトドアハンドル５におけるハンドル主部５ａの他端部には、該ハンドル主部５ａの意匠面５ａ１ とは反対側に突出する第２突部５ｃが一体に連設されており、オーバーフロー部１５およびフィルムゲート１６は、前記ハンドル主部５ａの意匠面５ａ１ を形成する第１金型８と、該意匠面５ａ１ および前記第２突部５ｃ間でハンドル主部５ａの他端に開口する肉抜き部１７を形成する第５金型１２との間に形成されている。このような金型構造によれば、第１および第５金型８，１２間の間隔を狭くすることが可能であり、キャビティ主部７ａの他端部における溶融樹脂およびガスの流通方向に沿ってフィルムゲート１６の上流側でガスの流通面積を絞ることができ、フィルムゲート１６からオーバーフロー部１５へのガスの流通をより一層効果的に遮断することができる。しかもハンドル主部５ａの他端部における他側面５ａ２ に第２突部５ｃが一体に連設されていることにより、肉抜き部１７の形成により、ハンドル主部５ａの他端部の肉厚が過度に薄くなることはない。
【００２４】
さらにガス充填ノズル１３は、その先端に設けられるガス充填口１８を空洞部６に対応する位置に配置するようにしてキャビティ７内に突入される。これにより、ガス充填ノズル１３の先端部は、アウトドアハンドル５のうち空洞部６を形成する壁部を貫通することになり、ガス充填ノズル１３の先端部の周囲における溶融樹脂の厚さを比較的大としてガス漏れの発生を極力回避し、製品不良の発生率を抑えることが可能となり、ガス充填口１８は充填ガスに曝されるのでガス充填口１８の詰まりが生じることも極力防止することができる。
【００２５】
しかもキャビティ７内に通じる挿入孔１９が第２金型９に設けられ、挿入孔１９に挿入されるガス充填ノズル１３の先端部には、挿入孔１９に嵌合される大径円筒部２０と、キャビティ７側に臨む環状の段部２１を大径円筒部２０との間に形成して大径円筒部の先端に同軸に連なる小径円筒部２２とが設けられており、溶融樹脂の射出後におけるガス充填により、小径円筒部２２の外面および段部２１で規定される外面形状ならびに挿入孔１９のキャビティ７側内面で規定される内面形状を有した円筒状の被封孔処理筒２４が、アウトドアハンドル５の第１突部５ｂから一体に突出するようにして第２金型９およびガス充填ノズル１３間で形成される。したがって、被封孔処理筒２４の肉厚を比較的大としてガス漏れの発生を極力回避して製品不良の発生率を抑えることが可能となり、また被封孔処理筒２４の形状を安定化し、該被封孔処理筒２４の外端開口部を蓋部材２５の溶着処理等で容易に封孔処理することができる。
【００２６】
以上、本発明の実施例を詳述したが、本発明は上記実施例に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行なうことが可能である。
【００２７】
たとえば本発明は、車両用アウトドアハンドルに限定して適用されるものではなく、ガスの充填による空洞部を有する樹脂製部品を成形するための金型成形装置として広く適用可能である。
【００２８】
【発明の効果】
以上のように請求項１記載の発明によれば、各金型のうちキャビティ主部の他端部を形成する一対の金型間に、キャビティ主部からの余分な溶融樹脂を逃がすためのオーバーフロー部と、キャビティ主部の他端およびオーバーフロー部間を結ぶフィルムゲートとを形成して、その余分な溶融樹脂がキャビティ主部の他端からオーバーフロー部に逃がされるようにしたので、成形完了後の樹脂製部品における部品主部の他端部で部分的に厚肉部が生じることを防止して、引けの発生による商品性の低下を防止することができる。また、特にキャビティ主部内へ充填されたガスがフィルムゲートからオーバーフロー部に逃げることのないように、該フィルムゲートに対応する部分で上記一対の金型間の間隔を１．５ｍｍ以下に設定したので、フィルムゲートからオーバーフロー部に充填ガスが逃げることはなくなり、従って、樹脂製部品の成形完了後にフィルムゲートのキャビティ主部側の端部を切断してフィルムゲートおよびオーバーフロー部に対応した余剰部分を樹脂製部品から除去したときに、部品主部の他端部に貫通孔が生じてしまうことがないため、貫通孔を塞ぐための後処理を施すことを不要として余分な手間を省くことができ、外観意匠性も優れたものとすることができる。
【００２９】
また請求項２記載の発明によれば、部品主部の他端部の肉厚が過度に薄くならないようにして、フィルムゲートからオーバーフロー部へのガスの流通をより一層効果的に遮断することができる。
【図面の簡単な説明】
【図１】車両用アウトドアハンドルの縦断面図である。
【図２】型閉じ状態にある金型成形装置の縦断面図である。
【図３】図２の３矢示部拡大図である。
【符号の説明】
５・・・樹脂製部品としてのアウトドアハンドル
５ａ・・・部品主部としてのハンドル主部
５ａ１ ・・・意匠面
５ｃ・・・突部
６・・・空洞部
７・・・キャビティ
７ａ・・・キャビティ主部
８，９，１０，１１，１２・・・金型
１３・・・ガス充填ノズル
１４・・・射出ゲート
１５・・・オーバーフロー部
１６・・・フィルムゲート
１７・・・肉抜き部[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, there are provided a plurality of molds for forming a cavity including a cavity main portion extending substantially linearly with one end connected to an injection gate in a mold closed state, and completion of injection of a predetermined amount of molten resin from the injection gate. A gas filling nozzle capable of filling a gas from at least one end side into at least the cavity main portion, including a component main portion formed in a shape corresponding to the cavity main portion, and filling the gas with the gas. The present invention relates to a resin part molding apparatus for molding a resin part having a cavity into a shape corresponding to the cavity.
[0002]
[Prior art]
Conventionally, in such a mold forming apparatus, after the injection of a predetermined amount of molten resin from the injection gate is completed, at least the inside of the main part of the cavity is filled with a gas from one end side thereof, so that a resin part having at least the inside of the main part is hollow. Although molding is performed, the other end of the cavity main portion is a closed end, and there is no escape of the molten resin due to gas filling, so that the resin part after molding is completed. At the other end of the main part of the component, a thick portion is partially formed, and the shrinkage may lower the commercial value.
[0003]
[Problems to be solved by the invention]
Therefore, in order to prevent the occurrence of shrinkage that has occurred in the above-described conventional mold forming apparatus, a mold that allows excess molten resin from the cavity main portion to escape to an overflow portion connected to the other end of the cavity main portion. A molding apparatus is also realized, and in this apparatus, it is possible to prevent a thick part from being partially formed at the other end of the main part of the resin component after the completion of molding. However, a part of the filling gas also escapes to the overflow part, and after the molding of the resin part is completed, if the surplus part corresponding to the overflow part is removed from the resin part, the overflow part is formed at the other end of the cavity main part. A part of the gas escapes to form a through hole, and it is necessary to perform a process for closing the through hole. As a result, it takes much time and labor to perform the above-described processing, and the appearance and design after closing the through-hole are also inferior.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a resin molding apparatus for molding a resin component, which does not require extra post-processing and can improve the appearance and design of the resin component. The purpose is to do.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 includes a plurality of molds that form a cavity including a cavity main portion extending substantially linearly with one end connected to an injection gate in a mold closed state, A gas filling nozzle capable of filling at least the gas from the one end side into the cavity main portion after completion of injection of a predetermined amount of molten resin from the injection gate, formed in a shape corresponding to the cavity main portion. A resin part including a main part of the resin and having a cavity formed by filling with the gas into a shape corresponding to the cavity. Between a pair of molds forming the other end of the cavity, an overflow portion for releasing excess molten resin from the cavity main portion, and the other end of the cavity main portion and the overflow portion. A film gate connecting the over portion is formed, gas filled into the cavity main portion is so as not to escape into the overflow portion from the film gate, the distance between the two mold at a portion corresponding to the film gate It is characterized in that it is set to 1.5 mm or less.
[0006]
According to such a configuration, excess molten resin from the cavity main portion is escaped from the other end of the cavity main portion to the overflow portion, and the other end of the component main portion in the resin component after the completion of molding. It is possible to prevent the occurrence of a partially thick portion, and to prevent a decrease in merchantability due to the occurrence of shrinkage. In addition, the other end of the cavity main portion and the overflow portion are connected via a film gate, and when the distance between the two dies is 1.5 mm or less at a portion corresponding to the film gate, the film gate is connected to the overflow portion. The present inventor has confirmed through experiments that no gas escapes. Therefore, when the end of the film gate on the side of the cavity main part is cut off after the molding of the resin part is completed and the surplus part corresponding to the film gate and the overflow part is removed from the resin part, the other end of the main part of the part is removed. No through-holes are generated, and no post-processing for closing the through-holes is required, so that extra work can be omitted and the appearance and design after cutting do not deteriorate.
[0007]
According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the resin part is provided with a part main part having one side surface as a design surface and a design part formed from the other end part of the part main part. The overflow portion and the film gate are integrally provided with a mold that forms a design surface of the component main portion, and a component main portion is formed between the design surface and the protrusion. According to this configuration, the mold that forms the lightening portion and the design surface of the main part of the part are characterized by being formed between the lightening portion and another die that forms the lightening portion that opens at the other end of the component. Between the mold and the mold to form a narrow, the flow area of the gas on the upstream side of the film gate along the flow direction of the molten resin and the gas at the other end of the cavity main portion, it is possible to reduce the film The flow of gas from the gate to the overflow section is more effectively blocked. It can be. In addition, since a protruding portion projecting to the opposite side to the design surface is integrally connected to the other end of the component main portion having one side surface as a design surface, the formation of the lightening portion allows the main portion of the component to be formed. The thickness of the other end does not become excessively thin.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described based on an embodiment of the present invention shown in the attached drawings.
[0009]
1 to 3 show one embodiment of the present invention. FIG. 1 is a longitudinal sectional view of an outdoor handle for a vehicle, FIG. 2 is a longitudinal sectional view of a mold forming apparatus in a mold closed state, and FIG. FIG. 3 is an enlarged view of a portion indicated by an arrow 3 in FIG. 2.
[0010]
First, in FIG. 1, the resin component is a outdoors handle 5 provided on the outer surface side of the vehicular door, the outdoor handle 5, as part main portion extending substantially linearly one side as a design surface 5a 1 a handle main portion 5a, a substantially L-shaped projecting on the side opposite to the design surface 5a 1 from the other side 5a 2 facing the opposite side of the design surface 5a 1 in the longitudinal direction one end side of the handle main portion 5a a first projection 5b, synthetic resin having in the longitudinal direction other end side of the handle main portion 5a from the other side surface 5a 2 together and a second projection 5c that protrudes on the side opposite to the design surface 5a 1 A hollow portion 6 is formed in a part of the first protrusion 5b and in the handle main portion 5a by gas filling.
[0011]
The first protrusion 5b is rotatably supported by a vehicle door, and the second protrusion 5c is connected to a vehicle door lock device.
[0012]
Such an outdoor handle 5 is formed by a mold forming device shown in FIG. 2, and the mold forming device forms a plurality of cavities 7 corresponding to the shape of the outdoor handle 5 in a closed state, for example. First to fifth molds 8, 9, 10, 11, 12 and a gas filling nozzle 13 for filling the cavity 7 with a gas for forming the cavity 6 are provided.
[0013]
The first protrusion forming portion 7b corresponding to the first protrusion 5b communicates with one longitudinal end of the cavity main portion 7a extending substantially linearly corresponding to the handle main portion 5a. A second protrusion forming portion 7c corresponding to the second protrusion 5c communicates with the other longitudinal end of the main portion 7a, and a first protrusion is formed between the second and third molds 8,9. The injection gate 14 connected to the portion 7b is formed. That is, the injection gate 14 is connected to one longitudinal end of the cavity main portion 7a via the first protrusion forming portion 7b, and a predetermined amount of molten resin is injected from the injection gate 14 into the cavity 7.
[0014]
Also, in order to allow excess molten resin from the cavity main part 7a to escape between the first and fifth dies 8, 12 forming the other end of the cavity main part 7a among the first to fifth dies 8 to 12. Is formed, and a film gate 16 connecting the other end of the cavity main portion 7a and the overflow portion 15 is formed. A gap between the first and fifth molds 8, 12 is formed at a portion corresponding to the film gate 16. L is set to 1.5 mm or less.
[0015]
Handle Moreover first mold 8, whereas a mold for forming a design surface 5a 1 of the handle main portion 5a, the fifth mold 12 is between該意Takumi surfaces 5a 1 and the second projection 5c A lightening portion 17 (see FIG. 1) that opens at the other end of the main portion 5a is formed.
[0016]
Referring also to FIG. 3, the gas filling nozzle 13 is inserted into the cavity 7 so that the gas filling port 18 provided at the tip thereof is arranged at a position corresponding to the cavity 6 in the outdoor handle 5. You.
[0017]
The vicinity of the injection gate 14 in the second mold 9 which corresponds to one end portion the other side 5a 2 of the cavity 7 of the first to fifth die 8-12 is provided an insertion hole 19 communicating with the cavity 7 Then, the gas filling nozzle 13 is inserted into the insertion hole 19.
[0018]
In addition, a large-diameter cylindrical portion 20 fitted into the insertion hole 19 and an annular step 21 facing the cavity 7 are formed between the large-diameter cylindrical portion 20 at the tip of the gas filling nozzle 13. A small-diameter cylindrical portion 22 coaxially connected to the distal end of the large-diameter cylindrical portion 20 and a cylindrical nozzle portion 23 coaxially connected to the distal end of the small-diameter cylindrical portion 22 with a smaller diameter than the small-diameter cylindrical portion 22 are provided. The gas filling port 18 is opened at the tip of the nozzle portion 23.
[0019]
By the way, a cooling water flow path (not shown) is provided in the gas filling nozzle 13, so that the tip of the gas filling nozzle 13 that comes into contact with the molten resin does not become overheated.
[0020]
According to such a mold molding apparatus, after the molding of the outdoor handle 5 is completed, the sealed processing cylinder 24 integrally projecting from the first projection 5b is connected to the tip of the gas filling nozzle 13 and the second mold. 9 and is formed in a cylindrical shape. That is, the sealed processing tube 24 is formed in a cylindrical shape having an outer surface shape defined by the outer surface of the small-diameter cylindrical portion 22 and the step portion 21 and an inner surface shape defined by the inner surface of the insertion hole 19 on the cavity 7 side. After the molding of the outdoor handle 5 is completed, the outer end opening of the sealed processing tube 24 is sealed with a synthetic resin lid member 25 partially fitted in the sealed processing tube 24. The hole is closed by a sealing process such as welding to the outer end surface of the hole processing cylinder 24.
[0021]
Next, the operation of this embodiment will be described. First and fifth dies 8 forming the other end of the cavity main portion 7a among the first to fifth dies 8 to 12 for molding the outdoor handle 5 will be described. , 12, an overflow portion 15 for letting out excess molten resin from the cavity main portion 7 a and a film gate 16 connecting the other end of the cavity main portion 7 a and the overflow portion 15 are formed. Excess molten resin from the portion 7a is released from the other end of the cavity main portion 7a to the overflow portion 15, and the thick portion is partially formed at the other end of the handle main portion 5a in the outdoor handle 5 after the molding is completed. Can be prevented, and a decrease in merchantability due to the occurrence of a contraction can be prevented.
[0022]
In addition, the distance L between the first and fifth molds 8 and 12 is set to 1.5 mm or less at a portion corresponding to the film gate 16, and when the distance L is 1.5 mm or less, the distance from the film gate 16 is reduced. The present inventor has confirmed by experiment that gas does not escape to the overflow section 15. Therefore, when the end of the film gate 16 on the side of the cavity main portion 7a is cut off after the molding of the outdoor handle 5 is completed and the surplus portion corresponding to the film gate 16 and the overflow portion 15 is removed from the outdoor handle 5, A through-hole does not occur at the other end of the portion 5a, and it is not necessary to perform a process for closing the through-hole, so that extra work can be omitted, and the appearance design after cutting is inferior. Nor.
[0023]
Also the other end of the handle main portion 5a of the outdoors handle 5, the design surface 5a 1 of the handle main portion 5a and second protrusions 5c protruding to the opposite side is provided integrally, the overflow section 15 and the film gate 16, a first mold 8 to form a design surface 5a 1 of the handle main portion 5a, open to the other end of the handle main portion 5a between該意Takumi surfaces 5a 1 and the second projection 5c It is formed between the fifth die 12 and the lightening portion 17. According to such a mold structure, the interval between the first and fifth molds 8 and 12 can be narrowed, and the other end of the cavity main portion 7a extends along the flow direction of the molten resin and gas. Thus, the gas flow area on the upstream side of the film gate 16 can be reduced, and the flow of gas from the film gate 16 to the overflow section 15 can be more effectively blocked. Moreover since the second protrusions 5c on the other side 5a 2 at the other end portion of the handle main part 5a is integrally connected to, the formation of the thin portion 17, the thickness of the other end portion of the handle main portion 5a Does not become too thin.
[0024]
Further, the gas filling nozzle 13 protrudes into the cavity 7 so that the gas filling port 18 provided at the tip thereof is arranged at a position corresponding to the cavity 6. As a result, the tip of the gas filling nozzle 13 penetrates the wall of the outdoor handle 5 forming the cavity 6, and the thickness of the molten resin around the tip of the gas filling nozzle 13 is relatively small. As a result, the occurrence of gas leakage can be avoided as much as possible, and the occurrence rate of product defects can be suppressed. Since the gas filling port 18 is exposed to the filling gas, clogging of the gas filling port 18 can be prevented as much as possible. it can.
[0025]
Moreover, an insertion hole 19 communicating with the cavity 7 is provided in the second mold 9, and a large-diameter cylindrical portion 20 fitted into the insertion hole 19 is provided at the tip of the gas filling nozzle 13 inserted into the insertion hole 19. An annular stepped portion 21 facing the cavity 7 is formed between the large-diameter cylindrical portion 20 and the large-diameter cylindrical portion 20, and a small-diameter cylindrical portion 22 is provided coaxially with the leading end of the large-diameter cylindrical portion. By the gas filling in the above, the cylindrical sealed hole processing cylinder 24 having the outer surface shape defined by the outer surface and the step portion 21 of the small diameter cylindrical portion 22 and the inner surface shape defined by the inner surface of the insertion hole 19 on the cavity 7 side, The outdoor handle 5 is formed between the second mold 9 and the gas filling nozzle 13 so as to project integrally from the first projection 5b. Therefore, by making the thickness of the sealed processing tube 24 relatively large, it is possible to avoid the occurrence of gas leakage as much as possible and to suppress the occurrence rate of product defects, and to stabilize the shape of the sealed processing tube 24, The outer end opening of the sealed tube 24 can be easily sealed by welding the lid member 25 or the like.
[0026]
As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible.
[0027]
For example, the present invention is not limitedly applied to an outdoor handle for a vehicle, but can be widely applied as a mold molding apparatus for molding a resin part having a cavity by gas filling.
[0028]
【The invention's effect】
As described above, according to the first aspect of the present invention, the overflow for releasing excess molten resin from the cavity main portion between the pair of molds forming the other end of the main cavity portion among the respective dies. Part and a film gate connecting the other end of the cavity main part and the overflow part, so that the excess molten resin is allowed to escape from the other end of the cavity main part to the overflow part . it is possible to prevent the partially thick portion at the other end portion of the component main unit occurs in the resin component, Ru it is possible to prevent deterioration of the product due to the occurrence of shrinkage. In addition, the distance between the pair of molds was set to 1.5 mm or less at a portion corresponding to the film gate so that gas charged into the cavity main portion did not escape from the film gate to the overflow portion. Therefore, the filling gas does not escape from the film gate to the overflow portion.Therefore, after the molding of the resin part is completed , the end of the film gate on the side of the cavity main portion is cut to remove an excess portion corresponding to the film gate and the overflow portion. When removed from the resin component, no through-hole is formed at the other end of the main part of the component, so that it is not necessary to perform post-processing for closing the through-hole, thereby saving unnecessary labor. Also, the appearance and design can be excellent.
[0029]
According to the second aspect of the present invention, the flow of gas from the film gate to the overflow portion can be more effectively blocked by preventing the thickness of the other end of the component main portion from becoming excessively thin. it can.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an outdoor handle for a vehicle.
FIG. 2 is a longitudinal sectional view of the mold forming apparatus in a mold closed state.
FIG. 3 is an enlarged view of a portion indicated by an arrow 3 in FIG. 2;
[Explanation of symbols]
5 Outdoor handle 5a as a resin part Handle main part 5a as a main part 1 Design surface 5c Projection 6 Cavity 7 Cavity 7a Cavity main parts 8, 9, 10, 11, 12 Mold 13 Gas filling nozzle 14 Injection gate 15 Overflow part 16 Film gate 17 Lightening part

Claims (2)

射出ゲート（１４）に一端を連ならせて略直線状に延びるキャビティ主部（７ａ）を含むキャビティ（７）を型閉じ状態で形成する複数の金型（８，９，１０，１１，１２）と、前記射出ゲート（１４）からの所定量の溶融樹脂の射出完了後に少なくとも前記キャビティ主部（７ａ）内に前記一端側からガスを充填することを可能としたガス充填ノズル（１３）とを備え、前記キャビティ主部（７ａ）に対応した形状に形成される部品主部（５ａ）を含むとともに前記ガスの充填による空洞部（６）を有した樹脂製部品（５）を、前記キャビティ（７）に対応した形状に成形する樹脂製部品の金型成形装置において、
前記各金型（８〜１２）のうち前記キャビティ主部（７ａ）の他端部を形成する一対の金型（８，１２）間に、キャビティ主部（７ａ）からの余分な溶融樹脂を逃がすためのオーバーフロー部（１５）と、キャビティ主部（７ａ）の他端およびオーバーフロー部（１５）間を結ぶフィルムゲート（１６）とが形成され、
キャビティ主部（７ａ）内へ充填されたガスがフィルムゲート（１６）からオーバーフロー部（１５）に逃げることのないように、該フィルムゲート（１６）に対応する部分で前記両金型（８，１２）間の間隔が１．５ｍｍ以下に設定されることを特徴とする、樹脂製部品の金型成形装置。A plurality of molds (8, 9, 10, 11, 12, 12) that form a cavity (7) including a cavity main portion (7a) extending substantially linearly with one end thereof connected to the injection gate (14). And a gas filling nozzle (13) capable of filling at least the cavity main portion (7a) with gas from the one end side after the injection of a predetermined amount of molten resin from the injection gate (14) is completed. A resin part (5) including a part main part (5a) formed in a shape corresponding to the cavity main part (7a) and having a cavity (6) formed by filling with the gas, In a die molding apparatus for a resin part molded into a shape corresponding to (7),
Excess molten resin from the cavity main part (7a) is put between a pair of molds (8, 12) forming the other end of the cavity main part (7a) among the molds (8 to 12). An overflow portion (15) for escape and a film gate (16) connecting the other end of the cavity main portion (7a) and the overflow portion (15) are formed.
In order to prevent the gas charged into the cavity main part (7a) from escaping from the film gate (16) to the overflow part (15), the two dies (8, 12) An apparatus for molding a resin part, wherein the interval between them is set to 1.5 mm or less. 前記樹脂製部品（５）は、一側面を意匠面（５ａ1 ）とした部品主部（５ａ）と、該部品主部（５ａ）の他端部から前記意匠面（５ａ1 ）とは反対側に突出する突部（５ｃ）とを一体に備え、前記オーバーフロー部（１５）およびフィルムゲート（１６）は、前記部品主部（５ａ）の意匠面（５ａ1 ）を形成する金型（８）と、該意匠面（５ａ1 ）および前記突部（５ｃ）間で部品主部（５ａ）の他端に開口する肉抜き部（１７）を形成する他の金型（１２）との間に形成されることを特徴とする、請求項１記載の樹脂製部品の金型成形装置。The resin component (5) is opposite to the design surface of one side and (5a 1) and the component main portion (5a), the design surface from the other end of the component main part (5a) and (5a 1) The overflow portion (15) and the film gate (16) are integrally provided with a projecting portion (5c) projecting to the side, and the mold (8) forming the design surface (5a 1 ) of the component main portion (5a) is provided. between),該意Takumi surface and (5a 1) and said projection (5c) lightening portion which opens at the other end of the component main portion (5a) between (17) the other of the mold to form a (12) The apparatus for molding a resin part according to claim 1, wherein the apparatus is formed from a resin.
JP7975099A 1999-03-24 1999-03-24 Molding equipment for resin parts Expired - Fee Related JP3554503B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP7975099A JP3554503B2 (en) 1999-03-24 1999-03-24 Molding equipment for resin parts
US09/532,947 US6371747B1 (en) 1999-03-24 2000-03-22 Die molding apparatus for resin article
GB0107146A GB2360486B (en) 1999-03-24 2000-03-23 Die molding apparatus for resin article
GB0006950A GB2350316B (en) 1999-03-24 2000-03-23 Die molding apparatus for resin article
CN00108361A CN1119223C (en) 1999-03-24 2000-03-24 Matched-mold forming device for producing resin product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7975099A JP3554503B2 (en) 1999-03-24 1999-03-24 Molding equipment for resin parts

Publications (2)

Publication Number Publication Date
JP2000271965A JP2000271965A (en) 2000-10-03
JP3554503B2 true JP3554503B2 (en) 2004-08-18

Family

ID=13698914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7975099A Expired - Fee Related JP3554503B2 (en) 1999-03-24 1999-03-24 Molding equipment for resin parts

Country Status (1)

Country Link
JP (1) JP3554503B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100602944B1 (en) 2004-11-11 2006-07-19 주식회사 신진화학 Car handles and molds

Also Published As

Publication number Publication date
JP2000271965A (en) 2000-10-03

Similar Documents

Publication Publication Date Title
JP4845180B2 (en) Injection mold apparatus and injection molding method
JP3554503B2 (en) Molding equipment for resin parts
JP3515700B2 (en) Molding equipment for resin parts
US6371747B1 (en) Die molding apparatus for resin article
JP5158077B2 (en) In-mold coating mold
JP2000271966A (en) Mold molding machine for resin component
JPH04125118A (en) Mold for in-mold coating
JPH10264222A (en) Valve structure for injection molding cylinder
JP2008260258A (en) Mold
JPH07314484A (en) Method and mold for injection molding
JP2997391B2 (en) Gas injection molding method and its mold
JP3108871B2 (en) Gas pressure injection molding method
JP3881118B2 (en) Mold for partial decorative integral molding of skin material and partial decorative molding method for skin material
JP6322018B2 (en) Injection mold and method of manufacturing resin molded product using the same
JP2000127200A (en) Method, mold, and molding for partly decorated integral forming of skin material
JP2000263600A (en) Resin molding, its injection molding mold, and injection molding method using the same
JP3040204B2 (en) Hollow resin injection molding equipment
JP2712728B2 (en) Cassette half molding method and cassette half molding die
GB2360486A (en) Gas-assist injection moulding apparatus
JP2001138373A (en) Injection molding method and injection mold
JPH11333553A (en) Casting metallic mold
JPS6123563A (en) Gas vent device of injection molding machine
JPH0866932A (en) Method and device for injection-molding synthetic resin molded article
JP3549467B2 (en) Molding method for composite molded products
JP2000167861A (en) Method for gas pressure injection molding

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20031128

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20031224

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040223

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040428

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040507

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313532

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313532

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100514

Year of fee payment: 6

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110514

Year of fee payment: 7

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120514

Year of fee payment: 8

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120514

Year of fee payment: 8

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130514

Year of fee payment: 9

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130514

Year of fee payment: 9

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140514

Year of fee payment: 10

LAPS Cancellation because of no payment of annual fees