JP3657943B2

JP3657943B2 - Mold cooling method and cooling device

Info

Publication number: JP3657943B2
Application number: JP2003023610A
Authority: JP
Inventors: 真新田; 人志石田; 豊明桐田
Original assignee: Ryobi Ltd
Current assignee: Ryobi Ltd
Priority date: 2003-01-31
Filing date: 2003-01-31
Publication date: 2005-06-08
Anticipated expiration: 2023-01-31
Also published as: JP2004230442A

Description

【０００１】
【発明の属する技術分野】
本発明は、金型の冷却方法及び冷却装置に関し、特に、金型内において略鉛直上方向きに形成された略円柱状の冷却穴内に冷却水を供給して金型を冷却する金型の冷却方法及び冷却装置に関する。
【０００２】
【従来の技術】
金型内に形成された略円柱状の冷却穴内に、冷却水を供給して金型を冷却する冷却装置としては、略棒状をした冷却パイプを備え、冷却穴に挿入された冷却パイプ内に冷却水を供給する構成が従来より知られている。
【０００３】
例えば、特許第３１８６０３０号公報には、この構成の冷却装置が記載されている。図１０に示されるように、従来の冷却装置１０１は、略棒状をした冷却パイプ１１０を備えており、冷却パイプ１１０は、外パイプ１１１と内パイプ１１２とを備える。外パイプ１１１と内パイプ１１２とは、同芯状に配設されて外パイプ１１１と内パイプ１１２との間の空間が外側流路１０１ａをなし、内パイプ１１２内部の空間が内側流路１０１ｂをなす。外側流路１０１ａと内側流路１０１ｂとは、冷却パイプ１１０が挿入される金型１０２の冷却穴１０２ａ内で、外パイプ１１１及び内パイプ１１２の一端１１１Ａ、１１２Ａにおいて連通している。
【０００４】
また、冷却装置１０１は、冷却水供給装置とエアー供給装置と切換装置と、排水用の管部材１２６と排水槽１２１とを備える。冷却水供給装置は、管部材１２２と、図せぬポンプ、動作制御装置、貯水槽とを備えており、管部材１２２は内パイプ１１２の他端１１２Ｂに接続され、内側流路１０１ｂに連通する。冷却水供給装置は、図示せぬポンプが駆動することによって、図示せぬ貯水槽に貯留されている冷却水を内側流路１０１ｂ内に供給する。冷却パイプ１１０においては内側流路１０１ｂが冷却水の往路となり、外側流路１０１ａが復路となる。即ち、内側流路１０１ｂに供給された冷却水は、内パイプ１１２の一端１１２Ａへ至り、外側流路１０１ａを通って外パイプ１１１の他端１１１Ｂから排出され、外側流路１０１ａに連通する管部材１２６を介して排水槽１２１に排出される。
【０００５】
エアー供給装置は、管部材１２３と、図せぬポンプ、動作制御装置とを備えており、管部材１２３は内パイプ１１２の他端１１２Ｂに接続され、内側流路１０１ｂに連通する。エアー供給装置は、図示せぬポンプが駆動することによって、エアーを内側流路１０１ｂ内に供給する。エアーは、内側流路１０１ｂを通って内パイプ１１２の一端１１２Ａへ至り、外側流路１０１ａを通る。このとき、外側流路１０１ａ内や、内側流路１０１ｂ内や、冷却穴１０２ａ内に残留している冷却水を、外側流路１０１ａの他端１１１Ｂから排出し、外側流路１０１ａに連通する管部材１２６を介して排水槽１２１に排出する。
【０００６】
切換装置は、電磁弁１３２、１３４と図示せぬ動作制御装置とを備える。冷却水供給装置によって冷却水が冷却パイプ１１０内に供給されているときには、電磁弁１３４を、エアー供給装置によるエアーの冷却パイプ１１０内への供給を遮断するエアー非供給状態とする。また、エアー供給装置によってエアーが冷却パイプ１１０内に供給されているときには、電磁弁１３２を、冷却水供給装置による冷却水の冷却パイプ１１０内への供給を遮断する冷却水非供給状態とする。
【０００７】
金型の冷却方法では、先ず、冷却パイプ１１０を冷却穴１０２ａ内に配置し、図１０に示されるように、切換装置が電磁弁１３２、１３４を切換えて、冷却水及びエアーの供給を遮断する初期状態とする。次に、図１１に示されるように、切換装置が電磁弁１３２を切換え、電磁弁１３４をエアー非供給状態として、冷却水を内側流路１０１ｂに供給する冷却水供給工程を行う。次に、図１２に示されるように、切換装置が電磁弁１３２及び１３４を切換え、電磁弁１３２を冷却水非供給状態として、エアーを内側流路１０１ｂに供給するエアー供給工程を行う。
【０００８】
【特許文献１】
特許第３１８６０３０号公報（図１、図３）
【０００９】
【発明が解決しようとする課題】
しかし、従来の金型の冷却方法及び冷却装置では、冷却穴１０２ａが金型１０２内において略鉛直上方向きに形成され、内パイプ１１２の一端１１２Ａが冷却穴１０２ａの内端１０２ｂ側に位置するように配置される場合には、内側流路１０１ｂに供給された冷却水は、内パイプ１１２の一端１１２Ａに至ると、内パイプ１１２の一端１１２Ａから外パイプ１１１の他端１１１Ｂへ向かって、落下するようにして内パイプ１１２と冷却穴１０２ａの内面との間の空間を流れる。
【００１０】
このとき冷却水は、内パイプ１１２と冷却穴１０２ａの内面との間の空間を均一に流れず、部分的に冷却水の流れない空間が生じ、冷却穴１０２ａの内面に均一に接触しない。このため、金型１０２の冷却が不安定となり、鋳造製品の品質が不安定となるという問題が生じていた。
【００１１】
そこで、本発明は、冷却穴が金型内において略鉛直上方向きに形成されている場合であっても、冷却穴の内面に均一に冷却水を接触させることができる金型の冷却方法及び冷却装置を提供することを目的とする。
【００１２】
【課題を解決するための手段】
上記目的を達成するために、本発明は、外パイプ１１の中に内パイプ１２が同芯状に配設されて該外パイプ１１と該内パイプ１２との間の空間が外側流路１ａとされ、該内パイプ１２内部の空間が内側流路１ｂとされ、該外側流路１ａと該内側流路１ｂとは該外パイプ１１及び該内パイプ１２の一端１１Ａ、１２Ａにおいて連通する略棒状の冷却パイプ１０を、金型２内において略鉛直上方向きに形成された冷却穴２ａの内端２ｂ側に該冷却パイプ１０の一端１２Ａが位置するように配置し、該冷却パイプ１０の他端部１１Ｂ、１２Ｂにおいて冷却水を供給排出させる金型の冷却方法において、別の冷却パイプを介さずに該冷却水を該外側流路１ａに供給し該内側流路１ｂを通して別の冷却パイプを介さずに排出させる冷却水供給工程と、該冷却水供給工程を行った後に、別の冷却パイプを介さずに該内側流路１ｂにエアーを供給することにより、冷却穴２ａ内又は該外側流路１ａ内又は該内側流路１ｂ内に残留している該冷却水を該外側流路１ａを通して別の冷却パイプを介さずに排出させるエアー供給工程とを行う金型の冷却方法を提供している。
【００１３】
また、本発明は、外パイプ１１の中に内パイプ１２が同芯状に配設されて該外パイプ１１と該内パイプ１２との間の空間が外側流路１ａをなし、該内パイプ１２内部の空間が内側流路１ｂをなし、該外側流路１ａと該内側流路１ｂとは該外パイプ１１及び該内パイプ１２の一端１１Ａ、１２Ａにおいて連通する略棒状の冷却パイプ１０と、該冷却パイプ１０の他端部１１Ｂに接続され冷却水を該冷却パイプ１０内に供給するための冷却水供給手段２２、２６と、該冷却パイプ１０の該他端部１２Ｂに接続されエアーを該冷却パイプ１０内に供給するためのエアー供給手段２３、２７と、該冷却水供給手段２２、２６によって該冷却水が該冷却パイプ１０内に供給されているときには、該エアー供給手段２３、２７による該エアーの該冷却パイプ１０内への供給を遮断するエアー非供給状態とし、該エアー供給手段２３、２７によって該エアーが該冷却パイプ１０内に供給されているときには、該冷却水供給手段２２、２６による該冷却水の該冷却パイプ１０内への供給を遮断する冷却水非供給状態とする切換手段３１、３２、３３、３４とを備え、該冷却パイプ１０は、金型２内において略鉛直上方向きに形成された冷却穴２ａの内端２ｂ側に該冷却パイプ１０の一端１２Ａが位置するように配置される金型の冷却装置１において、該冷却水供給手段２２、２６は別の冷却パイプを介さずに該外側流路１ａに接続されて該冷却水を該外側流路１ａに供給し、該エアー供給手段２３、２７は別の冷却パイプを介さずに該内側流路１ｂに接続されて該エアーを該内側流路１ｂに供給する金型の冷却装置１を提供している。
【００１４】
【発明の実施の形態】
本発明の実施の形態による金型の冷却方法及び冷却装置について説明する。図１に示されるように冷却装置１は、略棒状をした冷却パイプ１０と、排水タンク２１と、冷却水供給管２２と、エアー供給管２３と、第１排水管２４と、第２排水管２５と、第１中間管２６と、第２中間管２７と、４つの電磁弁３１〜３４と、図せぬ冷却水用ポンプ、エアー用ポンプ、貯水槽、動作制御回路とを備える。
【００１５】
冷却パイプ１０は、外パイプ１１と内パイプ１２とを備える。外パイプ１１と内パイプ１２とは、同芯状に配設されて外パイプ１１と内パイプ１２との間の空間が外側流路１ａをなし、内パイプ１２内部の空間が内側流路１ｂをなす。ダイカストを行うときに、内パイプ１２は、金型２内において略鉛直上方向きに形成された冷却穴２ａの内端２ｂ側に一端１２Ａが位置するように配置され、冷却穴２ａ内で当該一端１２Ａにおいて開口する。また、外パイプ１１は、冷却穴２ａの外端２ｃ近傍の位置に一端１１Ａが位置するように配置され、冷却穴２ａ内で当該一端１１Ａにおいて開口する。このため外側流路１ａ、内側流路１ｂは、それぞれ冷却穴２ａに連通しており、冷却穴２ａ内で外パイプ１１及び内パイプ１２の一端１１Ａ、１２Ａにおいて連通する。
【００１６】
冷却水供給管２２は、図１に示されるように一端が第１電磁弁３１に接続され、他端が図示せぬ冷却水用ポンプ及び図示せぬ貯水槽に接続され、途中には冷却水供給電磁弁３２が設けられている。エアー供給管２３は、図１に示されるように一端が第２電磁弁３３に接続され、他端が図示せぬエアー用ポンプに接続され、途中にはエアー供給電磁弁３４が設けられている。
【００１７】
第１電磁弁３１、第２電磁弁３３には、それぞれ第１排水管２４、第２排水管２５が接続されており、第１排水管２４、第２排水管２５は排水タンク２１に連通する。また、第１電磁弁３１、第２電磁弁３３には、第１中間管２６、第２中間管２７の一端がそれぞれ接続されており、第１中間管２６、第２中間管２７の他端は、それぞれ外パイプ１１、内パイプ１２の他端１１Ｂ、１２Ｂに接続されており、外側流路１ａ、内側流路１ｂにそれぞれ連通する。
【００１８】
冷却水供給電磁弁３２は、冷却水供給管２２の遮断／連通の切換をする。エアー供給電磁弁３４は、エアー供給管２３の遮断／連通の切換をする。第１電磁弁３１は、第１中間管２６と第１排水管２４とを遮断し且つ冷却水供給管２２を第１中間管２６に連通させる状態と、冷却水供給管２２と第１中間管２６とを遮断し且つ第１中間管２６と第１排水管２４とを連通させる状態との切換をする。
【００１９】
第２電磁弁３３は、第２中間管２７と第２排水管２５とを遮断し且つエアー供給管２３を第２中間管２７に連通させる状態と、エアー供給管２３と第２中間管２７とを遮断し且つ第２中間管２７と第２排水管２５とを連通させる状態との切換をする。図示せぬ動作制御回路は、これら４つの電磁弁３１〜３４に接続されており、電磁弁３１〜３４の切換動作を制御する。また、図示せぬ動作制御回路は、図示せぬダイカストマシンの制御部と接続されており、当該制御部からの射出開始信号を受信する。
【００２０】
ここで、冷却水供給管２２、第１中間管２６、図せぬ冷却水用ポンプ、図示せぬ貯水槽、図示せぬ動作制御回路は冷却水供給手段に相当する。また、エアー供給管２３、第２中間管２７、図せぬエアー用ポンプ、図示せぬ動作制御回路はエアー供給手段に相当する。また、冷却水供給電磁弁３２、エアー供給電磁弁３４、第１電磁弁３１、第２電磁弁３３、図示せぬ動作制御回路は切換手段に相当する。また、内パイプ１２の一端１２Ａは、冷却パイプの一端に一致する。また、外パイプ１１、内パイプ１２の他端１１Ｂ、１２Ｂは、冷却パイプの他端部を構成する。
【００２１】
次に、第１の実施の形態による金型の冷却方法を、図１乃至図３に基づき説明する。金型の冷却方法では冷却水供給工程とエアー供給工程とを行うが、これらの工程の前に予め冷却パイプ１０を、内パイプ１２の一端１２Ａが冷却穴２ａの内端２ｂ側に位置するように配置する。また、図示せぬ動作制御回路を駆動させて、４つの電磁弁３１〜３４を図１に示される初期状態とする。
【００２２】
次に冷却水供給工程を行う。冷却水供給工程では、先ず図示せぬ冷却水用ポンプを駆動させ、図示せぬ動作制御回路が図示せぬダイカストマシンからの射出開始信号を受信してから所定時間経過後に、動作制御回路が冷却水供給電磁弁３２を切換えて冷却水供給管２２を連通させ、図２に示される状態とする。すると、図示せぬ貯水槽からの冷却水は、冷却水供給管２２、第１中間管２６を通り外側流路１ａに供給され、冷却穴２ａ内に流入し、内側流路１ｂを通り、第２中間管２７を通り、第２排水管２５を通って排水タンク２１へと流れる。以上が冷却水供給工程である。
【００２３】
次に、エアー供給工程を行う。エアー供給工程では、冷却水供給工程で行った冷却水供給電磁弁３２の切換えから所定時間経過後に、図示せぬ動作制御回路が冷却水供給電磁弁３２を切換えて冷却水供給管２２を遮断し、図３に示される状態とする。これと同時に図示せぬ動作制御回路は、エアー供給電磁弁３４を切換えてエアー供給管２３を連通させ、図３に示される状態とする。また、第１電磁弁３１、第２電磁弁３３をそれぞれ切換えて、第１中間管２６を第１排水管２４に連通させ、第２中間管２７をエアー供給管２３に連通させて、図３に示される状態とする。
【００２４】
すると、エアーはエアー供給管２３、第２中間管２７を通り内側流路１ｂに供給され、冷却穴２ａ、外側流路１ａを通り、第１中間管２６、第１排水管２４を通り排水タンク２１へと流れる。これに伴い、冷却穴２ａ内、内側流路１ｂ、及び外側流路１ａ内に残留している冷却水は、エアーによりパージされ、排水タンク２１へと導かれる。ここで、パージを行うのは、冷却水を冷却穴２ａ内に供給した後に、冷却水が冷却穴２ａ内面に接触したまま残留して必要以上に金型２の温度が低下してしまうことを防止するためである。以上がエアー供給工程である。
【００２５】
そして、エアー供給工程を行った後、エアー供給工程で行ったエアー供給電磁弁３４の切換えから所定時間経過後に、図示せぬ動作制御回路がエアー供給電磁弁３４を切換えてエアー供給管２３を遮断し、図１に示される状態とし、また、第１電磁弁３１、第２電磁弁３３を切換えて、図１に示される状態とする。以上の工程を経て第１の実施の形態による金型の冷却方法が行われる。なお、図２に示される状態はエアー非供給状態に相当し、図３に示される状態は冷却水非供給状態に相当する。
【００２６】
次に、第２の実施の形態による金型の冷却方法を、図４乃至図６に基づき説明する。第２の実施の形態による金型の冷却方法では、第２電磁弁３３の初期状態が第１の実施の形態による金型の冷却方法とは異なる。これに伴い各工程が一部異なる。なお、第２の実施の形態による金型の冷却方法で用いられる第２の実施の形態による金型の冷却装置１は、第１の実施の形態による金型の冷却方法で用いられたものと同一である。
【００２７】
第２の実施の形態による金型の冷却方法においても、第１の実施の形態による金型の冷却方法と同様に、冷却水供給工程とエアー供給工程とを行うが、これらの工程の前に予め冷却パイプ１０を、その一端が冷却穴２ａの内端２ｂ側に位置するように配置する。また、図示せぬ動作制御回路を駆動させて、４つの電磁弁３１〜３４を図４に示される初期状態とする。
【００２８】
次に冷却水供給工程では、先ず図示せぬ冷却水用ポンプを駆動させ、図示せぬ動作制御回路が図示せぬダイカストマシンからの射出開始信号を受信してから所定時間経過後に、図示せぬ動作制御回路が冷却水供給電磁弁３２を切換えて冷却水供給管２２を連通させ、図５に示される状態とする。また第２電磁弁３３を切換えて第２中間管２７と第２排水管２５とを連通させ、図５に示される状態とする。すると、図示せぬ貯水槽からの冷却水は、冷却水供給管２２、第１中間管２６を通り外側流路１ａに供給され、冷却パイプ１０の一端に至り、冷却穴２ａ、内側流路１ｂを通り、第２中間管２７を通り、第２排水管２５を通って排水タンク２１へと流れる。以上が冷却水供給工程である。
【００２９】
次に、エアー供給工程を行う。エアー供給工程では、冷却水供給工程で行った冷却水供給電磁弁３２の切換えから所定時間経過後に、図示せぬ動作制御回路が冷却水供給電磁弁３２を切換えて冷却水供給管２２を遮断し、図６に示される状態とする。これと同時に図示せぬ動作制御回路は、エアー供給電磁弁３４を切換えてエアー供給管２３を連通させ、図６に示される状態とする。また、第１電磁弁３１、第２電磁弁３３を切換えて、第１中間管２６を第１排水管２４に連通させ、第２中間管２７をエアー供給管２３に連通させて、図６に示される状態とする。
【００３０】
すると、エアーはエアー供給管２３、第２中間管２７を通り内側流路１ｂに供給され、冷却穴２ａ、外側流路１ａを通り、第１中間管２６、第１排水管２４を通り排水タンク２１へと流れる。これに伴い、冷却穴２ａ内、内側流路１ｂ、及び外側流路１ａ内に残留している冷却水は、エアーによりパージされ、排水タンク２１へと導かれる。以上がエアー供給工程である。
【００３１】
そして、エアー供給工程を行った後、エアー供給工程で行ったエアー供給電磁弁３４の切換えから所定時間経過後に、図示せぬ動作制御回路がエアー供給電磁弁３４を切換えてエアー供給管２３を遮断し、図４に示される状態とし、また、第１電磁弁３１を切換えて、図４に示される状態とする。以上の工程を経て第２の実施の形態による金型の冷却方法が行われる。なお、図５に示される状態はエアー非供給状態に相当し、図６に示される状態は冷却水非供給状態に相当する。
【００３２】
次に、第３の実施の形態による金型の冷却方法及び冷却装置を、図７乃至図９に基づき説明する。第３の実施の形態による金型の冷却装置３は、冷却水供給管４２の途中に冷却水供給電磁弁３２が設けられていない点、及び、エアー供給管４３の途中にエアー供給電磁弁３４が設けられていない点で、第１の実施の形態による金型の冷却装置１の冷却水供給管２２、エアー供給管２３とは異なる。これに伴い金型の冷却方法も一部異なる。
【００３３】
第３の実施の形態による金型の冷却方法においても、第１の実施の形態による金型の冷却方法と同様に、冷却水供給工程とエアー供給工程とを行うが、これらの工程の前に予め冷却パイプ１０を、その一端が冷却穴２ａの内端２ｂ側に位置するように配置する。また、図示せぬ動作制御回路を駆動させて、２つの電磁弁３１、３３を図７に示される初期状態とする。
【００３４】
次に冷却水供給工程では、先ず図示せぬ冷却水用ポンプを駆動させ、図示せぬ動作制御回路が図示せぬダイカストマシンからの射出開始信号を受信してから所定時間経過後に、図示せぬ動作制御回路が第１電磁弁３１を切換えて冷却水供給管４２と第１中間管２６とを連通させ、図８に示される状態とする。すると、図示せぬ貯水槽からの冷却水は、冷却水供給管４２、第１中間管２６を通り外側流路１ａに供給され、冷却パイプ１０の一端に至り、冷却穴２ａ、内側流路１ｂを通り、第２中間管２７を通り、第２排水管２５を通って排水タンク２１へと流れる。以上が冷却水供給工程である。
【００３５】
次に、エアー供給工程を行う。エアー供給工程では、冷却水供給工程で行った第１電磁弁３１の切換えから所定時間経過後に、図示せぬ動作制御回路は第１電磁弁３１を切換えて、冷却水供給管４２と第１中間管２６とを遮断し且つ第１中間管２６と第１排水管２４とを連通し、図９に示される状態とする。また、図示せぬ動作制御回路は、第２電磁弁３３を切換えてエアー供給管４３と第２中間管２７とを連通させ、図９に示される状態とする。
【００３６】
すると、エアーはエアー供給管４３、第２中間管２７を通り内側流路１ｂに供給され、冷却穴２ａ、外側流路１ａを通り、第１中間管２６、第１排水管２４を通り排水タンク２１へと流れる。これに伴い、冷却穴２ａ内、内側流路１ｂ、及び外側流路１ａ内に残留している冷却水は、エアーによりパージされ、排水タンク２１へと導かれることは、第１、第２の実施の形態におけるエアー供給工程と同様である。以上がエアー供給工程である。
【００３７】
そして、エアー供給工程を行った後、エアー供給工程で行った第１電磁弁３１の切換えから所定時間経過後に、図示せぬ動作制御回路が第２電磁弁３３を切換えてエアー供給管４３と第２中間管２７とを遮断し、図７に示される状態とする。以上の工程を経て第３の実施の形態による金型の冷却方法が行われる。なお、図８に示される状態はエアー非供給状態に相当し、図９に示される状態は冷却水非供給状態に相当する。
【００３８】
冷却水を外側流路１ａに供給するようにしたため、内パイプ１２と冷却穴２ａの内面との間の空間内に、冷却水が冷却パイプ１０の下方から充填されるようにして供給されるため、均一に冷却水を冷却穴２ａの内面に接触させることができる。このため、金型２を安定して冷却させることができ、ダイカスト製品の品質を安定させることができる。
【００３９】
また、エアーを内側流路１ｂに供給するようにしたため、冷却穴２ａ内、外側流路１ａ内、及び内側流路１ｂ内に残留している冷却水を確実に排出することができる。
【００４０】
本発明による金型の冷却方法及び冷却装置は上述した実施の形態に限定されず、特許請求の範囲に記載した範囲で種々の変形や改良が可能である。例えば、本実施の形態による冷却水供給工程では、図示せぬ動作制御回路がダイカストマシンからの射出開始信号を受信してから所定時間経過後に、図示せぬ動作制御回路が冷却水供給電磁弁３２を切換えて図２に示される状態としたが、この所定時間は０秒でもよい。
【００４１】
また、本実施の形態による冷却水供給工程では、冷却水は第２排水管２５を通った後に排水タンク２１へと流れたが、排水タンク２１を設けずにそのまま廃水してもよい。又、冷却水を循環させて用いる場合には排水タンク２１から貯水槽へと冷却水を循環させればよい。
【００４２】
また、エアー供給工程において、冷却水供給工程で行った冷却水供給電磁弁３２の切換えから所定時間経過後に、図示せぬ動作制御回路が冷却水供給電磁弁３２を切換えて冷却水供給管２２を遮断するようにしたが、これに代えて、図示せぬ動作制御回路が射出開始信号を受信してから所定時間経過後に、図示せぬ動作制御回路が冷却水供給電磁弁３２を切換えて冷却水供給管２２を遮断するようにしてもよい。
【００４３】
【発明の効果】
請求項１記載の金型の冷却方法によれば、冷却水を外側流路に供給する冷却水供給工程を行うようにしたため、内パイプと冷却穴の内面との間の空間内に、冷却水を冷却パイプの下方から充填するようにして供給することができるため、均一に冷却水を冷却穴の内面に接触させることができる。このため、金型を安定して冷却することができ、製品の品質を安定させることができる。
【００４４】
また、エアーを内側流路に供給するエアー供給工程を行うようにしたため、冷却穴内、外側流路内、及び内側流路内に残留している冷却水を確実に排出することができる。
【００４５】
請求項２記載の金型の冷却装置によれば、冷却水供給手段は外側流路の他端に接続されて冷却水を外側流路に供給するようにしたため、内パイプと冷却穴の内面との間の空間内に、冷却水を冷却パイプの下方から充填するようにして供給することができるため、均一に冷却水を冷却穴の内面に接触させることができる。このため、金型を安定して冷却することができ、製品の品質を安定させることができる。
【００４６】
また、エアー供給手段は内側流路の他端に接続されてエアーを内側流路に供給するようにしたため、冷却穴内、外側流路内、及び内側流路内に残留している冷却水を確実に排出することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態による金型の冷却方法及び冷却装置を示す概略図。
【図２】本発明の第１の実施の形態による金型の冷却装置、及び金型の冷却方法の冷却水供給工程を行っている様子を示す概略図。
【図３】本発明の第１の実施の形態による金型の冷却装置、及び金型の冷却方法のエアー供給工程を行っている様子を示す概略図。
【図４】本発明の第２の実施の形態による金型の冷却方法及び冷却装置を示す概略図。
【図５】本発明の第２の実施の形態による金型の冷却装置、及び金型の冷却方法の冷却水供給工程を行っている様子を示す概略図。
【図６】本発明の第２の実施の形態による金型の冷却装置、及び金型の冷却方法のエアー供給工程を行っている様子を示す概略図。
【図７】本発明の第３の実施の形態による金型の冷却方法及び冷却装置を示す概略図。
【図８】本発明の第３の実施の形態による金型の冷却装置、及び金型の冷却方法の冷却水供給工程を行っている様子を示す概略図。
【図９】本発明の第３の実施の形態による金型の冷却装置、及び金型の冷却方法のエアー供給工程を行っている様子を示す概略図。
【図１０】従来の金型の冷却方法及び冷却装置を示す概略図。
【図１１】従来の金型の冷却装置、及び金型の冷却方法の冷却水供給工程を行っている様子を示す概略図。
【図１２】従来の金型の冷却装置、及び金型の冷却方法のエアー供給工程を行っている様子を示す概略図。
【符号の説明】
１冷却装置
１ａ外側流路
１ｂ内側流路
２金型
２ａ冷却穴
２ｂ内端
１０冷却パイプ
１１外パイプ
１１Ａ、１２Ａ一端
１１Ｂ、１２Ｂ他端
１２内パイプ
２２、４２冷却水供給管
２３、４３エアー供給管
２６第１中間管
２７第２中間管
３１第１電磁弁
３２冷却水供給電磁弁
３３第２電磁弁
３４エアー供給電磁弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold cooling method and a cooling apparatus, and more particularly to cooling a mold by supplying cooling water into a substantially cylindrical cooling hole formed substantially vertically upward in the mold. The present invention relates to a method and a cooling device.
[0002]
[Prior art]
As a cooling device for cooling the mold by supplying cooling water into a substantially cylindrical cooling hole formed in the mold, a cooling pipe having a substantially rod shape is provided, and the cooling pipe inserted into the cooling hole is provided in the cooling pipe. A configuration for supplying cooling water is conventionally known.
[0003]
For example, Japanese Patent No. 3186030 discloses a cooling device having this configuration. As shown in FIG. 10, the conventional cooling device 101 includes a cooling pipe 110 having a substantially rod shape, and the cooling pipe 110 includes an outer pipe 111 and an inner pipe 112. The outer pipe 111 and the inner pipe 112 are arranged concentrically, and the space between the outer pipe 111 and the inner pipe 112 forms the outer flow path 101a, and the space inside the inner pipe 112 forms the inner flow path 101b. Eggplant. The outer flow path 101a and the inner flow path 101b communicate with each other at the ends 111A and 112A of the outer pipe 111 and the inner pipe 112 in the cooling hole 102a of the mold 102 into which the cooling pipe 110 is inserted.
[0004]
The cooling device 101 includes a cooling water supply device, an air supply device, a switching device, a drain pipe member 126 and a drain tank 121. The cooling water supply device includes a pipe member 122, an unillustrated pump, an operation control device, and a water storage tank. The pipe member 122 is connected to the other end 112B of the inner pipe 112 and communicates with the inner flow path 101b. . The cooling water supply device supplies cooling water stored in a water storage tank (not shown) into the inner flow path 101b by driving a pump (not shown). In the cooling pipe 110, the inner flow path 101b is a forward path for cooling water, and the outer flow path 101a is a return path. That is, the cooling water supplied to the inner channel 101b reaches one end 112A of the inner pipe 112, is discharged from the other end 111B of the outer pipe 111 through the outer channel 101a, and communicates with the outer channel 101a. It is discharged to the drainage tank 121 through 126.
[0005]
The air supply device includes a pipe member 123, a pump (not shown), and an operation control device. The pipe member 123 is connected to the other end 112B of the inner pipe 112 and communicates with the inner flow path 101b. The air supply device supplies air into the inner flow path 101b by driving a pump (not shown). The air passes through the inner channel 101b to one end 112A of the inner pipe 112 and passes through the outer channel 101a. At this time, the cooling water remaining in the outer flow path 101a, the inner flow path 101b, or the cooling hole 102a is discharged from the other end 111B of the outer flow path 101a and communicated with the outer flow path 101a. It is discharged into the drainage tank 121 through the member 126.
[0006]
The switching device includes electromagnetic valves 132 and 134 and an operation control device (not shown). When the cooling water is supplied into the cooling pipe 110 by the cooling water supply device, the electromagnetic valve 134 is set to an air non-supply state in which supply of air into the cooling pipe 110 by the air supply device is shut off. When air is supplied into the cooling pipe 110 by the air supply device, the electromagnetic valve 132 is set in a cooling water non-supply state in which the supply of the cooling water into the cooling pipe 110 by the cooling water supply device is blocked.
[0007]
In the mold cooling method, first, the cooling pipe 110 is arranged in the cooling hole 102a, and as shown in FIG. 10, the switching device switches the electromagnetic valves 132 and 134 to cut off the supply of cooling water and air. Set to the initial state. Next, as shown in FIG. 11, the switching device performs the cooling water supply process of switching the electromagnetic valve 132 and setting the electromagnetic valve 134 to the air non-supply state to supply the cooling water to the inner flow path 101 b. Next, as shown in FIG. 12, the switching device switches the electromagnetic valves 132 and 134 to perform the air supply process of supplying the air to the inner flow path 101b with the electromagnetic valve 132 in a cooling water non-supply state.
[0008]
[Patent Document 1]
Japanese Patent No. 3186030 (FIGS. 1 and 3)
[0009]
[Problems to be solved by the invention]
However, in the conventional mold cooling method and cooling device, the cooling hole 102a is formed substantially vertically upward in the mold 102, and the one end 112A of the inner pipe 112 is positioned on the inner end 102b side of the cooling hole 102a. When the cooling water supplied to the inner flow path 101b reaches the one end 112A of the inner pipe 112, it falls from the one end 112A of the inner pipe 112 toward the other end 111B of the outer pipe 111. In this way, it flows in the space between the inner pipe 112 and the inner surface of the cooling hole 102a.
[0010]
At this time, the cooling water does not flow uniformly in the space between the inner pipe 112 and the inner surface of the cooling hole 102a, and a space where the cooling water does not partially flow is generated, and does not uniformly contact the inner surface of the cooling hole 102a. For this reason, the cooling of the metal mold | die 102 became unstable and the problem that the quality of casting product became unstable had arisen.
[0011]
Accordingly, the present invention provides a mold cooling method and cooling that can uniformly bring cooling water into contact with the inner surface of the cooling hole even when the cooling hole is formed substantially vertically upward in the mold. An object is to provide an apparatus.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, an inner pipe 12 is disposed concentrically in an outer pipe 11, and a space between the outer pipe 11 and the inner pipe 12 is formed with an outer flow path 1a. The space inside the inner pipe 12 is defined as an inner flow path 1b, and the outer flow path 1a and the inner flow path 1b are formed in a substantially rod shape communicating with the outer pipe 11 and the ends 11A and 12A of the inner pipe 12. The cooling pipe 10 is arranged so that one end 12A of the cooling pipe 10 is positioned on the inner end 2b side of the cooling hole 2a formed substantially vertically upward in the mold 2, and the other end of the cooling pipe 10 is disposed. In the mold cooling method of supplying and discharging cooling water in 11B and 12B, Without a separate cooling pipe The cooling water is supplied to the outer flow path 1a through the inner flow path 1b. Without a separate cooling pipe After performing the cooling water supply process to be discharged and the cooling water supply process, Without a separate cooling pipe By supplying air to the inner channel 1b, the cooling water remaining in the cooling hole 2a, the outer channel 1a, or the inner channel 1b is passed through the outer channel 1a. Without a separate cooling pipe A mold cooling method for performing an air supply step of discharging is provided.
[0013]
Further, according to the present invention, the inner pipe 12 is concentrically disposed in the outer pipe 11, and the space between the outer pipe 11 and the inner pipe 12 forms the outer flow path 1a. The internal space forms the inner flow path 1b, and the outer flow path 1a and the inner flow path 1b are substantially rod-shaped cooling pipes 10 communicating with the outer pipe 11 and the one ends 11A and 12A of the inner pipe 12, and Cooling water supply means 22, 26 connected to the other end 11B of the cooling pipe 10 for supplying cooling water into the cooling pipe 10, and air connected to the other end 12B of the cooling pipe 10 for cooling the air When the cooling water is supplied into the cooling pipe 10 by the air supply means 23, 27 for supplying the pipe 10 and the cooling water supply means 22, 26, the air supply means 23, 27 Air cooling pie When the air is not supplied and the air supply means 23 and 27 supplies the air into the cooling pipe 10, the cooling water supplied by the cooling water supply means 22 and 26 is used. Switching means 31, 32, 33, 34 for shutting off the supply into the cooling pipe 10, and the cooling pipe 10 is formed substantially vertically upward in the mold 2. In the mold cooling device 1 arranged so that one end 12A of the cooling pipe 10 is positioned on the inner end 2b side of the cooling hole 2a, the cooling water supply means 22, 26 are Without a separate cooling pipe Connected to the outer flow path 1a to supply the cooling water to the outer flow path 1a, the air supply means 23, 27 are Without a separate cooling pipe A mold cooling device 1 is provided which is connected to the inner channel 1b and supplies the air to the inner channel 1b.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A mold cooling method and a cooling apparatus according to an embodiment of the present invention will be described. As shown in FIG. 1, the cooling device 1 includes a substantially rod-shaped cooling pipe 10, a drain tank 21, a cooling water supply pipe 22, an air supply pipe 23, a first drain pipe 24, and a second drain pipe. 25, a first intermediate pipe 26, a second intermediate pipe 27, four electromagnetic valves 31 to 34, an unillustrated cooling water pump, an air pump, a water storage tank, and an operation control circuit.
[0015]
The cooling pipe 10 includes an outer pipe 11 and an inner pipe 12. The outer pipe 11 and the inner pipe 12 are arranged concentrically, and the space between the outer pipe 11 and the inner pipe 12 forms the outer flow path 1a, and the space inside the inner pipe 12 forms the inner flow path 1b. Eggplant. When performing die casting, the inner pipe 12 is disposed so that one end 12A is positioned on the inner end 2b side of the cooling hole 2a formed substantially vertically upward in the mold 2, and the one end in the cooling hole 2a. Open at 12A. The outer pipe 11 is arranged such that one end 11A is located near the outer end 2c of the cooling hole 2a, and opens at the one end 11A in the cooling hole 2a. For this reason, the outer flow path 1a and the inner flow path 1b communicate with the cooling hole 2a, and communicate with each other at the ends 11A and 12A of the outer pipe 11 and the inner pipe 12 within the cooling hole 2a.
[0016]
As shown in FIG. 1, one end of the cooling water supply pipe 22 is connected to the first electromagnetic valve 31, and the other end is connected to a cooling water pump (not shown) and a water storage tank (not shown). A supply electromagnetic valve 32 is provided. As shown in FIG. 1, one end of the air supply pipe 23 is connected to the second electromagnetic valve 33, the other end is connected to an air pump (not shown), and an air supply electromagnetic valve 34 is provided in the middle. .
[0017]
A first drain pipe 24 and a second drain pipe 25 are connected to the first solenoid valve 31 and the second solenoid valve 33, respectively, and the first drain pipe 24 and the second drain pipe 25 communicate with the drain tank 21. . One end of a first intermediate pipe 26 and a second intermediate pipe 27 is connected to the first electromagnetic valve 31 and the second electromagnetic valve 33, respectively, and the other end of the first intermediate pipe 26 and the second intermediate pipe 27. Are connected to the other ends 11B and 12B of the outer pipe 11 and the inner pipe 12, respectively, and communicate with the outer flow path 1a and the inner flow path 1b, respectively.
[0018]
The cooling water supply electromagnetic valve 32 switches between blocking / communication of the cooling water supply pipe 22. The air supply electromagnetic valve 34 switches between shutting off / communication of the air supply pipe 23. The first solenoid valve 31 is configured to shut off the first intermediate pipe 26 and the first drain pipe 24 and to connect the cooling water supply pipe 22 to the first intermediate pipe 26, and the cooling water supply pipe 22 and the first intermediate pipe 26, and the state where the first intermediate pipe 26 and the first drain pipe 24 are communicated with each other is switched.
[0019]
The second electromagnetic valve 33 is configured to shut off the second intermediate pipe 27 and the second drain pipe 25 and to communicate the air supply pipe 23 with the second intermediate pipe 27, the air supply pipe 23, the second intermediate pipe 27, Is switched to a state in which the second intermediate pipe 27 and the second drain pipe 25 are communicated with each other. An operation control circuit (not shown) is connected to the four electromagnetic valves 31 to 34 and controls the switching operation of the electromagnetic valves 31 to 34. An operation control circuit (not shown) is connected to a control unit of a die casting machine (not shown), and receives an injection start signal from the control unit.
[0020]
Here, the cooling water supply pipe 22, the first intermediate pipe 26, a cooling water pump (not shown), a water storage tank (not shown), and an operation control circuit (not shown) correspond to the cooling water supply means. The air supply pipe 23, the second intermediate pipe 27, the air pump (not shown), and the operation control circuit (not shown) correspond to air supply means. The cooling water supply solenoid valve 32, the air supply solenoid valve 34, the first solenoid valve 31, the second solenoid valve 33, and an operation control circuit (not shown) correspond to switching means. Further, one end 12A of the inner pipe 12 coincides with one end of the cooling pipe. The other ends 11B and 12B of the outer pipe 11 and the inner pipe 12 constitute the other end of the cooling pipe.
[0021]
Next, a mold cooling method according to the first embodiment will be described with reference to FIGS. In the mold cooling method, a cooling water supply step and an air supply step are performed. Before these steps, the cooling pipe 10 is preliminarily placed so that one end 12A of the inner pipe 12 is positioned on the inner end 2b side of the cooling hole 2a. To place. Further, an operation control circuit (not shown) is driven to set the four electromagnetic valves 31 to 34 to the initial state shown in FIG.
[0022]
Next, a cooling water supply process is performed. In the cooling water supply process, a cooling water pump (not shown) is first driven, and the operation control circuit cools after a predetermined time has elapsed since the operation control circuit (not shown) receives an injection start signal from a die casting machine (not shown). The water supply electromagnetic valve 32 is switched to allow the cooling water supply pipe 22 to communicate with the state shown in FIG. Then, the cooling water from the water storage tank (not shown) is supplied to the outer flow path 1a through the cooling water supply pipe 22 and the first intermediate pipe 26, flows into the cooling hole 2a, passes through the inner flow path 1b, 2 flows through the intermediate pipe 27 and flows through the second drain pipe 25 to the drain tank 21. The above is the cooling water supply process.
[0023]
Next, an air supply process is performed. In the air supply process, after a predetermined time has elapsed since the switching of the cooling water supply electromagnetic valve 32 performed in the cooling water supply process, an operation control circuit (not shown) switches the cooling water supply electromagnetic valve 32 and shuts off the cooling water supply pipe 22. The state shown in FIG. At the same time, an operation control circuit (not shown) switches the air supply solenoid valve 34 to connect the air supply pipe 23 to the state shown in FIG. Further, the first solenoid valve 31 and the second solenoid valve 33 are respectively switched so that the first intermediate pipe 26 communicates with the first drain pipe 24 and the second intermediate pipe 27 communicates with the air supply pipe 23. The state shown in.
[0024]
Then, the air is supplied to the inner flow path 1b through the air supply pipe 23 and the second intermediate pipe 27, passes through the cooling hole 2a and the outer flow path 1a, passes through the first intermediate pipe 26 and the first drain pipe 24, and is a drain tank. It flows to 21. Accordingly, the cooling water remaining in the cooling holes 2 a, the inner flow path 1 b, and the outer flow path 1 a is purged with air and guided to the drain tank 21. Here, purging is performed after the cooling water is supplied into the cooling hole 2a, and the cooling water remains in contact with the inner surface of the cooling hole 2a and the temperature of the mold 2 is lowered more than necessary. This is to prevent it. The above is the air supply process.
[0025]
After performing the air supply process, after a predetermined time has elapsed since the switching of the air supply electromagnetic valve 34 performed in the air supply process, an operation control circuit (not shown) switches the air supply electromagnetic valve 34 and shuts off the air supply pipe 23. Then, the state shown in FIG. 1 is obtained, and the first electromagnetic valve 31 and the second electromagnetic valve 33 are switched to obtain the state shown in FIG. The mold cooling method according to the first embodiment is performed through the above steps. The state shown in FIG. 2 corresponds to an air non-supply state, and the state shown in FIG. 3 corresponds to a cooling water non-supply state.
[0026]
Next, a mold cooling method according to the second embodiment will be described with reference to FIGS. In the mold cooling method according to the second embodiment, the initial state of the second electromagnetic valve 33 is different from the mold cooling method according to the first embodiment. As a result, each process is partially different. The mold cooling device 1 according to the second embodiment used in the mold cooling method according to the second embodiment is the same as that used in the mold cooling method according to the first embodiment. Are the same.
[0027]
In the mold cooling method according to the second embodiment, the cooling water supply process and the air supply process are performed as in the mold cooling method according to the first embodiment. The cooling pipe 10 is previously arranged so that one end thereof is positioned on the inner end 2b side of the cooling hole 2a. Further, an operation control circuit (not shown) is driven to set the four electromagnetic valves 31 to 34 to the initial state shown in FIG.
[0028]
Next, in the cooling water supply step, a cooling water pump (not shown) is first driven, and after a predetermined time has elapsed since the operation control circuit (not shown) has received an injection start signal from a die casting machine (not shown), it is not shown. The operation control circuit switches the cooling water supply electromagnetic valve 32 to connect the cooling water supply pipe 22 to the state shown in FIG. Further, the second electromagnetic valve 33 is switched to allow the second intermediate pipe 27 and the second drain pipe 25 to communicate with each other, and the state shown in FIG. Then, cooling water from a water storage tank (not shown) passes through the cooling water supply pipe 22 and the first intermediate pipe 26 and is supplied to the outer flow path 1a, reaches one end of the cooling pipe 10, and reaches the cooling hole 2a and the inner flow path 1b. , The second intermediate pipe 27, the second drain pipe 25, and the drainage tank 21. The above is the cooling water supply process.
[0029]
Next, an air supply process is performed. In the air supply process, after a predetermined time has elapsed since the switching of the cooling water supply electromagnetic valve 32 performed in the cooling water supply process, an operation control circuit (not shown) switches the cooling water supply electromagnetic valve 32 and shuts off the cooling water supply pipe 22. The state shown in FIG. At the same time, an operation control circuit (not shown) switches the air supply solenoid valve 34 to connect the air supply pipe 23 to the state shown in FIG. In addition, the first solenoid valve 31 and the second solenoid valve 33 are switched so that the first intermediate pipe 26 communicates with the first drain pipe 24 and the second intermediate pipe 27 communicates with the air supply pipe 23, as shown in FIG. As shown.
[0030]
Then, the air is supplied to the inner flow path 1b through the air supply pipe 23 and the second intermediate pipe 27, passes through the cooling hole 2a and the outer flow path 1a, passes through the first intermediate pipe 26 and the first drain pipe 24, and is a drain tank. It flows to 21. Accordingly, the cooling water remaining in the cooling holes 2 a, the inner flow path 1 b, and the outer flow path 1 a is purged with air and guided to the drain tank 21. The above is the air supply process.
[0031]
After performing the air supply process, after a predetermined time has elapsed since the switching of the air supply electromagnetic valve 34 performed in the air supply process, an operation control circuit (not shown) switches the air supply electromagnetic valve 34 and shuts off the air supply pipe 23. Then, the state shown in FIG. 4 is set, and the first electromagnetic valve 31 is switched to the state shown in FIG. The mold cooling method according to the second embodiment is performed through the above steps. The state shown in FIG. 5 corresponds to an air non-supply state, and the state shown in FIG. 6 corresponds to a cooling water non-supply state.
[0032]
Next, a mold cooling method and cooling apparatus according to a third embodiment will be described with reference to FIGS. In the mold cooling device 3 according to the third embodiment, the cooling water supply electromagnetic valve 32 is not provided in the middle of the cooling water supply pipe 42, and the air supply electromagnetic valve 34 is provided in the middle of the air supply pipe 43. Is different from the cooling water supply pipe 22 and the air supply pipe 23 of the mold cooling device 1 according to the first embodiment. Along with this, the mold cooling method is also partially different.
[0033]
In the mold cooling method according to the third embodiment, the cooling water supply process and the air supply process are performed as in the mold cooling method according to the first embodiment. The cooling pipe 10 is previously arranged so that one end thereof is positioned on the inner end 2b side of the cooling hole 2a. Further, an operation control circuit (not shown) is driven to set the two electromagnetic valves 31 and 33 to the initial state shown in FIG.
[0034]
Next, in the cooling water supply step, a cooling water pump (not shown) is first driven, and after a predetermined time has elapsed since the operation control circuit (not shown) has received an injection start signal from a die casting machine (not shown), it is not shown. The operation control circuit switches the first electromagnetic valve 31 to connect the cooling water supply pipe 42 and the first intermediate pipe 26 to the state shown in FIG. Then, cooling water from a water storage tank (not shown) passes through the cooling water supply pipe 42 and the first intermediate pipe 26 and is supplied to the outer flow path 1a, reaches one end of the cooling pipe 10, and reaches the cooling hole 2a and the inner flow path 1b. , The second intermediate pipe 27, the second drain pipe 25, and the drainage tank 21. The above is the cooling water supply process.
[0035]
Next, an air supply process is performed. In the air supply process, after a predetermined time has elapsed since the switching of the first electromagnetic valve 31 performed in the cooling water supply process, the operation control circuit (not shown) switches the first electromagnetic valve 31 to connect the cooling water supply pipe 42 and the first intermediate valve. The pipe 26 is shut off, and the first intermediate pipe 26 and the first drain pipe 24 are communicated with each other, as shown in FIG. Further, an operation control circuit (not shown) switches the second electromagnetic valve 33 to connect the air supply pipe 43 and the second intermediate pipe 27 to a state shown in FIG.
[0036]
Then, the air passes through the air supply pipe 43 and the second intermediate pipe 27 and is supplied to the inner flow path 1b, passes through the cooling hole 2a and the outer flow path 1a, passes through the first intermediate pipe 26 and the first drain pipe 24, and is a drain tank. It flows to 21. Along with this, the cooling water remaining in the cooling hole 2a, the inner flow path 1b, and the outer flow path 1a is purged by air and guided to the drain tank 21 in the first and second directions. This is the same as the air supply step in the embodiment. The above is the air supply process.
[0037]
Then, after performing the air supply process, after a predetermined time has elapsed since the switching of the first electromagnetic valve 31 performed in the air supply process, an operation control circuit (not shown) switches the second electromagnetic valve 33 to connect the air supply pipe 43 and the first electromagnetic valve 31. 2 The intermediate pipe 27 is shut off, and the state shown in FIG. The mold cooling method according to the third embodiment is performed through the above steps. The state shown in FIG. 8 corresponds to an air non-supply state, and the state shown in FIG. 9 corresponds to a cooling water non-supply state.
[0038]
Since the cooling water is supplied to the outer flow path 1a, the cooling water is supplied from below the cooling pipe 10 into the space between the inner pipe 12 and the inner surface of the cooling hole 2a. The cooling water can be uniformly brought into contact with the inner surface of the cooling hole 2a. For this reason, the metal mold | die 2 can be cooled stably and the quality of die-cast product can be stabilized.
[0039]
Further, since air is supplied to the inner flow path 1b, the cooling water remaining in the cooling holes 2a, the outer flow path 1a, and the inner flow path 1b can be reliably discharged.
[0040]
The mold cooling method and cooling device according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, in the cooling water supply step according to the present embodiment, the operation control circuit (not shown) receives the cooling water supply electromagnetic valve 32 after a predetermined time has elapsed after the operation control circuit (not shown) receives the injection start signal from the die casting machine. However, the predetermined time may be 0 seconds.
[0041]
Further, in the cooling water supply process according to the present embodiment, the cooling water flows to the drain tank 21 after passing through the second drain pipe 25, but the drain water may be disposed as it is without providing the drain tank 21. When the cooling water is circulated and used, the cooling water may be circulated from the drain tank 21 to the water storage tank.
[0042]
Further, in the air supply process, after a predetermined time has elapsed since the switching of the cooling water supply electromagnetic valve 32 performed in the cooling water supply process, an operation control circuit (not shown) switches the cooling water supply electromagnetic valve 32 to connect the cooling water supply pipe 22. Instead of this, instead of this, the operation control circuit (not shown) switches the cooling water supply electromagnetic valve 32 and switches the cooling water supply after a predetermined time has elapsed since the operation control circuit (not shown) receives the injection start signal. The supply pipe 22 may be shut off.
[0043]
【The invention's effect】
According to the mold cooling method of claim 1, since the cooling water supply step of supplying the cooling water to the outer flow path is performed, the cooling water is placed in the space between the inner pipe and the inner surface of the cooling hole. Can be supplied from below the cooling pipe so that the cooling water can be uniformly brought into contact with the inner surface of the cooling hole. For this reason, a metal mold | die can be cooled stably and the quality of a product can be stabilized.
[0044]
Moreover, since the air supply process which supplies air to an inner side flow path was performed, the cooling water remaining in a cooling hole, an outer side flow path, and an inner side flow path can be discharged | emitted reliably.
[0045]
According to the mold cooling device of claim 2, since the cooling water supply means is connected to the other end of the outer flow path and supplies the cooling water to the outer flow path, the inner pipe and the inner surface of the cooling hole, Since the cooling water can be supplied into the space between the cooling pipes from below the cooling pipe, the cooling water can be uniformly brought into contact with the inner surface of the cooling hole. For this reason, a metal mold | die can be cooled stably and the quality of a product can be stabilized.
[0046]
In addition, since the air supply means is connected to the other end of the inner flow path to supply air to the inner flow path, the cooling water remaining in the cooling hole, the outer flow path, and the inner flow path is surely secured. Can be discharged.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a mold cooling method and a cooling apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic view showing a state in which a cooling water supply process of the mold cooling apparatus and the mold cooling method according to the first embodiment of the present invention is performed.
FIG. 3 is a schematic view showing a state in which an air supply process of a mold cooling apparatus and a mold cooling method according to the first embodiment of the present invention is performed.
FIG. 4 is a schematic view showing a mold cooling method and a cooling apparatus according to a second embodiment of the present invention.
FIG. 5 is a schematic view showing a state in which a cooling water supply process of a mold cooling apparatus and a mold cooling method according to a second embodiment of the present invention is performed.
FIG. 6 is a schematic view showing a state where an air supply process of a mold cooling apparatus and a mold cooling method according to a second embodiment of the present invention is performed.
FIG. 7 is a schematic view showing a mold cooling method and a cooling apparatus according to a third embodiment of the present invention.
FIG. 8 is a schematic view showing a state of performing a cooling water supply step of a mold cooling apparatus and a mold cooling method according to a third embodiment of the present invention.
FIG. 9 is a schematic view showing a state where an air supply process of a mold cooling apparatus and a mold cooling method according to a third embodiment of the present invention is performed.
FIG. 10 is a schematic view showing a conventional mold cooling method and cooling apparatus.
FIG. 11 is a schematic view showing a state where a cooling water supply step of a conventional mold cooling apparatus and mold cooling method is performed.
FIG. 12 is a schematic view showing a state where an air supply step of a conventional mold cooling apparatus and mold cooling method is performed.
[Explanation of symbols]
1 Cooling device
1a Outer channel
1b Inner channel
2 Mold
2a Cooling hole
2b Inner end
10 Cooling pipe
11 Outer pipe
11A, 12A one end
11B, 12B The other end
12 Inner pipe
22, 42 Cooling water supply pipe
23, 43 Air supply pipe
26 First intermediate pipe
27 Second intermediate pipe
31 1st solenoid valve
32 Cooling water supply solenoid valve
33 Second solenoid valve
34 Air supply solenoid valve

Claims

An inner pipe is disposed concentrically in the outer pipe, a space between the outer pipe and the inner pipe is an outer flow path, a space inside the inner pipe is an inner flow path, and the outer pipe The flow path and the inner flow path include a substantially rod-shaped cooling pipe communicating with one end of the outer pipe and the inner pipe, and the cooling pipe formed on the inner end side of a cooling hole formed substantially vertically upward in the mold. In a mold cooling method in which one end of the cooling pipe is disposed and cooling water is supplied and discharged at the other end of the cooling pipe,
A cooling water supply step of discharging without going through a separate cooling pipe the cooling water supplied to the outer passage through the inner flow path without passing through another cooling pipe,
After performing the cooling water supply step, by supplying air to the inner channel without passing through another cooling pipe , the air remaining in the cooling hole or in the outer channel or in the inner channel An air supply step for discharging cooling water through the outer flow path without passing through another cooling pipe .

An inner pipe is concentrically arranged in the outer pipe, a space between the outer pipe and the inner pipe forms an outer flow path, a space inside the inner pipe forms an inner flow path, and the outer pipe The flow path and the inner flow path are substantially rod-shaped cooling pipes communicating with one end of the outer pipe and the inner pipe,
Cooling water supply means connected to the other end of the cooling pipe for supplying cooling water into the cooling pipe;
An air supply means connected to the other end of the cooling pipe for supplying air into the cooling pipe;
When the cooling water is being supplied into the cooling pipe by the cooling water supply means, an air non-supply state for blocking the supply of the air into the cooling pipe by the air supply means is set, and the air supply means When the air is being supplied into the cooling pipe, the cooling water supply means is provided with switching means for cutting off the supply of the cooling water into the cooling pipe so as not to supply cooling water.
In the mold cooling apparatus, the cooling pipe is disposed so that one end of the cooling pipe is positioned on the inner end side of the cooling hole formed in a substantially vertical upward direction in the mold.
The cooling water supply means is connected to the outer flow path without going through another cooling pipe to supply the cooling water to the outer flow path,
The mold cooling apparatus is characterized in that the air supply means is connected to the inner flow path without passing through another cooling pipe and supplies the air to the inner flow path.