JP4014530B2

JP4014530B2 - Mold cooling pipe

Info

Publication number: JP4014530B2
Application number: JP2003094725A
Authority: JP
Inventors: 重義駒木
Original assignee: Ahresty Corp
Current assignee: Ahresty Corp
Priority date: 2003-03-31
Filing date: 2003-03-31
Publication date: 2007-11-28
Anticipated expiration: 2023-03-31
Also published as: JP2004298921A

Description

【０００１】
【発明の属する技術分野】
本発明は、ダイカスト鋳造や射出成形等に使用される金型の冷却穴に装着して金型を冷却するための金型用冷却パイプに関し、特に、外パイプの中に内パイプを配置して冷却水の往路と復路を形成せしめ、これら外パイプおよび内パイプの一端側に、上記往路に通じる入水接続口と復路に通じる出水接続口を備えたホース接続口金を周方向に回転可能に取り付けて構成される一般的に回転ヘッド式冷却パイプと称される金型用冷却パイプに関するものである。
【０００２】
【従来の技術】
従来のこの種金型用冷却パイプは、一般的に図６に示すごとく、外パイプａの一端側に回転軸部分ｂが捻じ込みまたはロー付け或いは溶接などにより一体化され、その回転軸部分ｂにホース接続口金ｃが回転可能に装着され、ホース接続口金ｃの両端を上記回転軸部分ｂの大径段部ｂ’とナットｄでもって締結することにより軸方向に移動不能に固定していた。しかも、上記回転軸部分ｂの大径段部ｂ’はホース接続口金ｃの軸方向に対する位置決めと外パイプａを金型の冷却穴に捻じ込み螺合させるべく工具を係合させるための回動操作部を兼ねているので、外径がホース接続口金ｃの回転軸部分ｂ挿入穴の内径より大きく且つ６角形状に形成されていた。その為に、金型Ｂの冷却穴Ｃに装着された冷却パイプ（外パイプａ）を引き抜く場合、回転軸部分ｂからホース接続口金ｃを引き抜いた後もしくはホース接続口金ｃと共にでなければ冷却パイプ（外パイプａ）を引き抜くことができず、従って、特にホース接続口金ｃの入水接続口ｅおよび出水接続口ｆに剛性のある銅パイプｇが接続されているような場合には、回転軸部分ｂからホース接続口金ｃを取り外すのに非常に取り外し難かった。
また、ナットｄまたは大径段部ｂ’に工具を係合させて外パイプａを金型Ｂに捻じ込む際に、ナットｄおよび大径段部ｂ’が外パイプａよりも大径であるため外パイプａを締め付ける工具より大きな工具を必要とし、過大な捻じ込み力で締め付け外パイプの先端部外周にある雄ネジｈを破壊することがあった。（例えば、特許文献１参照。）
【０００３】
【先行技術文献の開示】
【特許文献１】
特開昭６３−４７３８３号公報
【０００４】
【発明が解決しようとする課題】
本発明はこのような従来の不具合に鑑みてなされたものであり、その目的とするところは、外パイプの回転軸部分に対してホース接続口金を簡便に脱着することができると共に、金型の冷却穴に装着された冷却パイプを引き抜く場合に、外パイプないしは回転軸部分からホース接続口金を取り外す前でも取り外した後でも冷却パイプ（外パイプ）を金型冷却穴から引き抜くことができる金型用冷却パイプを提供せんとするものである。
【０００５】
【課題を解決するための手段】
斯かる目的を達成する本発明の金型用冷却パイプは、外パイプの中に内パイプを配置して冷却水の往路と復路を形成せしめ、これら外パイプおよび内パイプの一端側には上記往路に通じる入水接続口と復路に通じる出水接続口を備えたホース接続口金を周方向に回転可能に取り付けて構成される金型用冷却パイプにおいて、前記ホース接続口金に前記外パイプを取り付ける装着用穴を貫通状に形成し、該装着用穴に外パイプを串刺し状に且つ抜き差し自在に貫挿取り付けると共に、外パイプの外径を全長にわたって上記装着用穴の内径より小径に形成せしめ、ホース接続口金を外パイプの外周に着脱可能に取り付けた止め具で軸方向に移動不能に固定してなることを特徴としたものである（請求項１）。
この際、前記外パイプの外周に、ホース接続口金を取り付ける際の位置決めを兼ねた止め具係合溝を形成せしめ、該止め具係合溝に前記止め具を着脱可能に取り付けることによりホース接続口金を外パイプの外周に周方向に回転可能であって軸方向に移動不能に固定するようにすると良い（請求項２）。
また、前記外パイプを、ホース接続口金を回転可能に貫挿取り付けるための回転軸部分と冷却水の復路となる外パイプ本体部分とを別々に形成して後加工により両者を一体化することにより形成するようにしても良い（請求項３）。
また、前記外パイプの一端に当該外パイプの外径と同じかそれより小径の回動操作部を形成せしめ、該回動操作部に工具を係合させて当該外パイプを周方向に回動することにより当該外パイプを金型の冷却穴に押し込むなり捻じ込み螺合させて装着することが好ましい（請求項４）。
更に、前記止め具としては、一般的な止め輪（ｓｎａｐｒｉｎｇ）やスナップリテーナ以外に、前記ホース接続口金の軸方向の長さとほぼ同じ間隔で相対峙させた止め板部に前記外パイプを貫通させる挿通穴を形成すると共にその少なくとも一方に前記外パイプの外周に形成した止め具係合溝と係脱自在に係合する係合穴を連設してなる略コの字形状をした形態をなしたものを用い、上記両止め板部をホース接続口金の両端に配置せしめ上記係合穴を前記止め具係合溝に係合させることによりホース接続口金を軸方向に移動不能に固定するようにしても良い（請求項５）。
また、金型用冷却パイプの外パイプとしては、当該外パイプの外径を全長にわたって前記ホース接続口金に形成された装着用穴の内径より小径に形成して前記ホース接続口金及び金型の冷却穴に対して抜き差し自在且つ周方向に回動自在に貫挿取り付けられるようにし、且つ該外パイプの一端には当該外パイプの外径と同じかそれより小径の回動操作部を形成せしめ、該回動操作部に工具を係合させることにより当該外パイプを周方向に回動可能としてなることを特徴としたものである（請求項６）。
【０００６】
【発明の実施の形態】
以下、本発明の具体的な好適実施例を図面を参照しながら詳細に説明するが、本発明は図示実施例のものに限定されるものではない。また、図１〜図５を通して同様の構成部材には同じ符号を付して重複する説明は省略する。
【０００７】
本発明に係る金型冷却用パイプＡは、同芯状に配置された外パイプ１と内パイプ２の一端側に、冷却水往路に通じる入水接続口３ａと冷却水復路に通じる出水接続口３ｂを備えたホース接続口金３を周方向に回転可能に取り付けて構成され、金型Ｂの背面側からキャビティ方へ向けて穿設された冷却穴Ｃに取り外し自在に挿入装着される。この際、冷却水による圧力等でもって冷却用パイプＡが冷却穴Ｃから抜け出さないように、図示実施例のごとく外パイプ１の先端部外周に雄ネジ１１を刻設して金型Ｂに螺合させることにより固定するか、または金型Ｂの背面側に押え板（図示せず）を設置しその押え板に冷却用パイプＡの一端部を当接させることにより固定する。
尚、この種の金型冷却用パイプＡでは通常、内パイプ２を外パイプ１より長く形成して、内パイプ２の中を冷却水往路となし、外パイプ１と内パイプ２の間を冷却水復路としており、内パイプ２（冷却水往路）から吐出された冷却水が金型との間で熱交換が行なわれて外パイプ１と内パイプ２の間の冷却水復路に至るまでの区間が本来の冷却水穴であって、金型Ｂの背面側からキャビティ方へ向けて穿設された冷却パイプ装着用穴と区別すべきところ、本明細書では両者を合わせて単に冷却穴Ｃと称し説明している。
【０００８】
外パイプ１は、金属パイプを所要の長さにカットして用いるか若しくは所要の長さを有する金属棒を軸方向に開削して中空状に形成すると共に、その全長にわたって外径をホース接続口金３に形成された装着用穴３１の内径より小径に形成してなり、中空内部には内パイプ２を同芯状に挿入配置せしめ、金型Ｂの冷却穴Ｃ内に挿入されない一端側にはホース接続口金３を周方向に回転可能に取り付ける。
この際、外パイプ１を、ホース接続口金３を回転可能に取り付けるための回転軸部分１２と、内パイプ２と協働して冷却水復路を形成する外パイプ本体部１３とを別々に形成して、後加工により両者を一体化することにより１本の外パイプとして形成するようにしても良い。この場合も、その外径は全長にわたってホース接続口金３に形成された装着用穴３１の内径より小径に形成する。
【０００９】
また、外パイプ１の一端側、詳しくは、ホース接続口金３を回転可能に取り付けるための回転軸部分１２には、当該回転軸部分１２に装着されるホース接続口金３に形成された入水接続口３ａと出水接続口３ｂにそれぞれ対応する位置に、入水室１ａと出水室１ｂとを長手軸線上に並べて形成すると共に、入水室１ａにはホース接続口金３の入水接続口３ａに連通する入水口１４を、出水室１ｂには出水接続口６に連通する出水口１５を開口形成してなる。従って、入水室１ａと出水室１ｂは、外パイプ１の中に内パイプ２を組み付けていない状態では連通状態となっており、外パイプ１の一端開口を水密状に封止する封止ネジ栓１８と内パイプ２の一端に取り付けられた兼用ネジ栓２１で仕切られることにより形成される。
【００１０】
そして、上記入水口１４および出水口１５の両側位置には、入水室１ａおよび出水室１ｂの水密性を保持するＯ−リング４を取り付けるための凹溝をそれぞれ形成せしめ、更に、回転軸部分１２に取り付けられたホース接続口金３の両端部分にあたる位置には、ホース接続口金３を取り付ける際の位置決めを兼ねた止め具係合溝１６を形成する。
【００１１】
止め具係合溝１６は、ホース接続口金３を外パイプ１の回転軸部分１２に対して周方向に回転可能であって軸方向に移動不能に固定するための止め具５を着脱可能に取り付けそのことにより同時にホース接続口金３を取り付ける際の位置決めを兼ねるものであり、必ずしもなくとも良い。すなわち、止め具係合溝１６がなくとも止め具５を外パイプ１の外周に取り付けることによりホース接続口金３を外パイプ１の回転軸部分１２に対して周方向に回転可能であって軸方向に移動不能な状態に固定することは可能であるが、ホース接続口金３を外パイプ１の回転軸部分１２に取り付ける際に位置決めとなる目印がないと、ホース接続口金３に形成された入水接続口３ａおよび出水接続口３ｂと回転軸部分１２に形成した入水口１４および出水口１５との位置合わせが面倒になる、また止め具５が振動等により容易に動かないようになるので、止め具係合溝１６を形成することが好ましい。止め具係合溝１６を形成する場合には、外パイプ１の回転軸部分１２の外周に少なくとも１つ、好ましくはホース接続口金３の軸方向の長さとほぼ同じ間隔をおいて２つ、更に好ましくは、大きさの異なるホース接続口金３にも対応できるように３つ以上を形成する。
【００１２】
更に外パイプ１の一端、詳しくは、回転軸部分１２の最外端には、当該外パイプ１の外径と同じかそれより小径の六角形または四角形等の非円形状をした回動操作部１７を形成する。この回動操作部１７は、工具を係合させて外パイプ１を周方向に回動することにより当該外パイプを金型Ｂの冷却穴Ｃに押し込むなり捻じ込み螺合させて装着するためのものである。
【００１３】
ホース接続口金３は、適当な長さを有する略円柱形状または多角柱形状または方円柱状或いは長方形のブロック形状をした金属製ブロック材を用いて、冷却水往路に通じる入水接続口３ａと冷却水復路に通じる出水接続口３ｂをそれぞれ長手軸方向と直交する方向に形成すると共に、外パイプ１の回転軸部分１２を貫挿取り付けるための装着用穴３１を入水接続口３ａおよび出水接続口３ｂと連通するように長手軸方向に沿って貫通状に形成してなり、その装着用穴３１に外パイプ１の回転軸部分１２を串刺し状に且つ抜き差し自在に貫挿取り付けた後、外パイプ１の回転軸部分１２に止め具５でもって周方向に回転可能且つ軸方向に移動不能な状態に固定される。
【００１４】
本金型冷却用パイプＡに使用する止め具５としては、ＪＩＳで規格されている一般的な止め輪（ｓｎａｐｒｉｎｇ）やスナップリテーナを用いることができるが、それ以外に、図４および図５に示したごとく、略コの字形状をした形態に形成したものも用いることができる。この止め具５’は、ホース接続口金３の軸方向の長さとほぼ同じ間隔で２枚の止め板部５１，５１を相対峙させ、これら両止め板部５１，５１に外パイプ１を貫通させる挿通穴５２，５２をそれぞれ形成すると共に、少なくとも一方の止め板部５１の挿通穴５２に外パイプ１の外周に形成せしめた止め具係合溝１６と係脱自在に係合しえる係合穴５３を係合穴５３より小さい幅の連結穴５４でもって連続して形成し全体として略コの字形状をした形態に形成されている。
而して、この止め具５’を使用する場合には、ホース接続口金３を外パイプ１の回転軸部分１２に取り付ける前に予め、ホース接続口金３をこの略コの字形状をした止め具５’に両止め板部５１，５１の挿通穴５２，５２がホース接続口金３の装着用穴３１と合致するように両止め板部５１，５１をホース接続口金３の両端に配置させ、その状態でホース接続口金３を外パイプ１の回転軸部分１２に貫挿せしめて止め具５’の係合穴５３を回転軸部分１２の止め具係合溝１６に係合させる。これにより、ホース接続口金３が外パイプ１の回転軸部分１２に対して所定の位置に周方向に回転可能で且つ軸方向に移動不能な状態に取り付けられる。よって、この止め具５’の係合穴５３を回転軸部分１２の止め具係合溝１６に係脱するだけで、ホース接続口金３を外パイプ１の回転軸部分１２に取り付けたり取り外すことが可能となる。
また、止め具５’は冷却パイプＡへの着脱の目的で挿通穴５２，５２を止め板部５１，５１の先端に向かって開口されていても良いが、回転軸部分１２の止め具係合溝１６からの係脱する際に止め具５’が脱落することを避けるため、開口幅は連結穴５４と等しいか小さくすることが望ましい。
さらに、止め具５’は脱落を防止するため背板部５５にホース６を通す穴を開けて背板部５５がホース６側になるように設置しても良い。
【００１５】
次に、図１および図２を参照しながらＪＩＳで規格されている一般的な止め輪（ｓｎａｐｒｉｎｇ）５ａ，５ｂを使用した場合を説明する。この場合には、外パイプ１の回転軸部分１２の金型Ｂ寄りに形成された止め具係合溝１６ａに予め止め具５ａを取り付けておき、ホース接続口金３の装着用穴３１に外パイプ１の回転軸部分１２を串刺し状に且つ抜き差し自在に貫挿してホース接続口金３の一端側を止め具５ａに当接させ、その後、ホース接続口金３の他端側にある止め具係合溝１６ｂに止め具５ｂを取り付ける。これにより、ホース接続口金３が外パイプ１の回転軸部分１２に対して所定の位置に周方向に回転可能で且つ軸方向に移動不能な状態に取り付けられ、ホース接続口金３の他端側にある止め具５ｂを止め具係合溝１６ｂから取り外すだけで、ホース接続口金３を外パイプ１の回転軸部分１２に取り付けたり取り外すことが可能となる。
【００１６】
なお、内パイプ２は外パイプ１内に予め組み込んでおく。この際、図示実施例のごとく外パイプ１の一端開口が封止ネジ栓１８で水密状に封止された構造の場合には、内パイプ２の一端に取り付けられた兼用ネジ栓２１と螺合する雌ネジを入水室１ａ側に形成するのが好ましいが、金属棒を軸方向に開削して封止ネジ栓１８が必要のないように外パイプ１ないし回転軸部分１２を形成した場合には、出水室１ｂ側に形成する。
【００１７】
そして、本金型冷却用パイプＡを金型Ｂの冷却穴Ｃに装着する場合には、外パイプ１の他端側外周にリング状パッキングを取付けて金型Ｂの冷却穴８内に押し込み装着するか、または図示実施例のごとく外パイプ１の他端側の外周に雄ネジ１１を刻設して金型Ｂの冷却穴Ｃ内に捻じ込み螺合させて装着し、最後に、ホース接続口金３の入水接続口３ａおよび出水接続口３ｂにそれぞれホースや銅パイプ６を接続させる。すなわち、本発明に係る金型冷却用パイプＡの場合、内部に予め内パイプ２を組み込んだ外パイプ１を金型Ｂの冷却穴Ｃに装着した後に、外パイプ１の回転軸部分１２にホース接続口金３を装着しても良いし、外パイプ１の回転軸部分１２に予めホース接続口金３を装着しておき、それを金型Ｂの冷却穴Ｃに装着するようにしても良い。
【００１８】
かくして、ホース接続口金３の入水接続口４から供給された冷却水は、入水室１ａを通って内パイプ２の一端側開口から内パイプ２の内部すなわち冷却水往路を通り、金型Ｂの冷却穴Ｃ内で熱交換されて金型の熱を奪う。そして、金型Ｂの冷却穴Ｃ内で熱交換された冷却水は、外パイプ１と内パイプ２の間で形成された冷却水復路を通り、外パイプ１の出水室１ｂから出水接続口３ｂを通して外部に排出される。
【００１９】
【発明の効果】
本発明に係る金型用冷却パイプは斯様に構成したので、外パイプの回転軸部分に対してホース接続口金を簡便に脱着することができると共に、金型の冷却穴に装着された冷却パイプを引き抜く場合に、外パイプないしは回転軸部分からホース接続口金を取り外す前でも取り外した後でも冷却パイプ（外パイプ）を金型冷却穴から引き抜くことができる。そのため、外パイプおよび内パイプに詰まりが発生して交換する場合、また外パイプの他端側に取り付けたリング状パッキングを交換する場合に作業が容易となる。
しかも、外パイプの外径が全長にわたって装着用穴の内径より小径に形成されているので、外パイプからホース接続口金を取り除くことにより、図３に示すごとき冷却ブロックを用いた配管も可能となり、冷却ブロックを金型に設置したまま外パイプを抜き差し出来るし、外パイプを金型に設置したまま冷却ブロックを脱着できる。従ってホース接続口金を除いた冷却パイプの多様性に優れ、金型用冷却パイプとしての製作コストの低減化を期することができる。
【００２０】
また、特に請求項２記載の金型用冷却パイプによれば、外パイプの外周にホース接続口金を取り付ける際の位置決めを兼ねた止め具係合溝を形成してなるので、ホース接続口金を外パイプの回転軸部分に取り付ける際に、ホース接続口金に形成された入水接続口および出水接続口と回転軸部分に形成した入水口および出水口との正確な位置合わせを簡便に行なえるようになる。
【００２１】
また、特に請求項３記載の金型用冷却パイプによれば、外パイプを、ホース接続口金を回転可能に貫挿取り付けるための回転軸部分と冷却水の復路となる外パイプ本体部分とを別々に形成して後加工により両者を一体化することにより形成してなるので、外パイプ本体部分は金型の大きさや形状に応じて長さが異なる多品種になっても、回転軸部分を共通化させることが可能となり、トータル的に金型用冷却パイプとしての製品のコストを軽減させることができる。
【００２２】
更に、特に請求項４記載の金型用冷却パイプによれば、外パイプの一端に当該外パイプの外径と同じかそれより小径の回動操作部を形成せしめ、該回動操作部に工具を係合させて当該外パイプを周方向に回動するようにしたので、外パイプを金型の冷却穴に押し込むなり捻じ込み螺合させる装着作業に大型の工具を必要とせず、過大な捻じ込み力が発生し難くなり外パイプ先端にある雄ネジを破壊しなくなる。
【００２３】
そして、特に請求項５記載の金型用冷却パイプによれば、ホース接続口金の軸方向の長さとほぼ同じ間隔で相対峙させた止め板部に外パイプを貫通させる挿通穴を形成すると共にその少なくとも一方に外パイプの外周に形成した止め具係合溝と係脱自在に係合する係合穴を連設してなる略コの字形状をした形態をなし、上記両止め板部をホース接続口金の両端に配置せしめ係合穴を止め具係合溝に係合させることによりホース接続口金を軸方向に移動不能に固定するようにしたので、止め具を工具がなくとも簡便に脱着することができると共に止め具を紛失したり金型に脱着する際に金型の間に落下したりすることがなくなる。
【図面の簡単な説明】
【図１】 (ａ)は第１実施例の断面図であり金型の冷却穴に装着した状態を示し、（ｂ）は側面図。
【図２】本発明の第１実施例に係る分解図。
【図３】第２実施例の断面図であり金型の冷却穴に装着した状態を示す。
【図４】第３実施例の断面図であり金型の冷却穴に装着した状態を示す。
【図５】第３実施例の要部の分解斜視図。
【図６】従来例を示す半断面正面図。
【符号の説明】
Ａ：金型用冷却パイプＢ：金型
Ｃ：冷却穴
１：外パイプ１２：回転軸部分
１３：外パイプ本体部分１６ａ，１６ｂ：止め具係合溝
１７：回動操作部５ａ，５ｂ：止め具
５’：止め具
５１：止め板部５２：挿通穴
５３：係合穴５４：連結穴
５５：背板部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold cooling pipe for cooling a mold by mounting it in a mold cooling hole used for die casting or injection molding, and in particular, an inner pipe is disposed in an outer pipe. A cooling water forward path and a return path are formed, and a hose connection base having a water inlet port leading to the forward path and a water outlet port leading to the backward path is attached to one end side of the outer pipe and the inner pipe so as to be rotatable in the circumferential direction. The present invention relates to a mold cooling pipe generally called a rotary head type cooling pipe.
[0002]
[Prior art]
As shown in FIG. 6, this conventional mold cooling pipe is generally integrated with a rotating shaft portion b on one end side of the outer pipe a by screwing, brazing, welding, or the like. The hose connection base c is rotatably attached to the hose connection base c, and both ends of the hose connection base c are fixed with the large diameter step b ′ of the rotary shaft portion b and the nut d so as to be immovable in the axial direction. . Moreover, the large-diameter step b 'of the rotary shaft portion b is positioned for positioning the hose connection cap c in the axial direction and rotating for engaging the tool to screw the outer pipe a into the cooling hole of the mold and screw it. Since it also serves as an operation portion, the outer diameter is larger than the inner diameter of the rotation shaft portion b insertion hole of the hose connection base c and is formed in a hexagonal shape. Therefore, when pulling out the cooling pipe (outer pipe a) attached to the cooling hole C of the mold B, the cooling pipe is not after the hose connection cap c is pulled out from the rotating shaft portion b or with the hose connection cap c. When the (outer pipe a) cannot be pulled out, and therefore a rigid copper pipe g is connected to the water inlet port e and the water outlet port f of the hose connector c, the rotating shaft portion It was very difficult to remove the hose connection cap c from b.
Further, when the tool is engaged with the nut d or the large diameter step b ′ and the outer pipe a is screwed into the mold B, the nut d and the large diameter step b ′ have a larger diameter than the outer pipe a. For this reason, a tool larger than the tool for tightening the outer pipe a is required, and the male screw h on the outer periphery of the distal end portion of the tightened outer pipe may be destroyed by an excessive screwing force. (For example, refer to Patent Document 1.)
[0003]
[Disclosure of prior art documents]
[Patent Document 1]
Japanese Patent Laid-Open No. 63-47383
[Problems to be solved by the invention]
The present invention has been made in view of such conventional problems. The object of the present invention is to allow the hose connection base to be easily detached from the rotating shaft portion of the outer pipe and When pulling out the cooling pipe installed in the cooling hole, for the mold that can pull out the cooling pipe (outer pipe) from the mold cooling hole before or after removing the hose connection cap from the outer pipe or rotating shaft It is intended to provide a cooling pipe.
[0005]
[Means for Solving the Problems]
The mold cooling pipe of the present invention that achieves such an object has an inner pipe arranged in an outer pipe to form an outward path and a return path of cooling water, and the outer pipe and the inner pipe are provided with the outgoing path on one end side thereof. In a cooling pipe for a mold, which is configured by rotatably attaching a hose connection base having a water connection port leading to a water outlet and a water discharge connection port leading to a return path in the circumferential direction, a mounting hole for attaching the outer pipe to the hose connection base The outer pipe is inserted into the mounting hole in a skewered manner so that it can be inserted and removed freely, and the outer diameter of the outer pipe is formed to be smaller than the inner diameter of the mounting hole over the entire length. Is fixed to the outer periphery of the outer pipe so as to be detachable, and is fixed so as not to move in the axial direction (Claim 1).
At this time, a stopper engaging groove that also serves as a positioning for attaching the hose connection base is formed on the outer periphery of the outer pipe, and the hose connection base is detachably attached to the stopper engagement groove. The outer pipe may be fixed to the outer periphery of the outer pipe so as to be rotatable in the circumferential direction and immovable in the axial direction.
In addition, the outer pipe is formed by separately forming a rotating shaft portion for inserting the hose connection base in a rotatable manner and an outer pipe main body portion serving as a return path of the cooling water, and integrating both by post-processing. It may be formed (claim 3).
In addition, a rotating operation part having a diameter equal to or smaller than the outer diameter of the outer pipe is formed at one end of the outer pipe, and a tool is engaged with the rotating operation part to rotate the outer pipe in the circumferential direction. Accordingly, it is preferable that the outer pipe is attached by being screwed or screwed into the cooling hole of the mold (claim 4).
Further, as the stopper, in addition to a general snap ring and a snap retainer, the outer pipe is passed through a stopper plate portion that is relatively bent at substantially the same interval as the axial length of the hose connection base. A substantially U-shaped configuration in which an insertion hole is formed, and an engagement hole that is detachably engaged with a stopper engagement groove formed on the outer periphery of the outer pipe is provided on at least one of the insertion holes. By using what is made, the both stop plate portions are arranged at both ends of the hose connection base, and the engagement hole is engaged with the stopper engagement groove so that the hose connection base is fixed in an axially immovable manner. (Claim 5).
Further, as the outer pipe of the mold cooling pipe, the outer diameter of the outer pipe is formed to be smaller than the inner diameter of the mounting hole formed in the hose connection base over the entire length to cool the hose connection base and the mold. The outer pipe is formed so that it can be inserted into and removed from the hole and rotated in the circumferential direction, and at one end of the outer pipe, a rotating operation portion having a diameter equal to or smaller than the outer diameter of the outer pipe is formed. The outer pipe can be turned in the circumferential direction by engaging a tool with the turning operation portion (Claim 6).
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the illustrated embodiments. Moreover, the same code | symbol is attached | subjected to the same structural member through FIGS. 1-5, and the overlapping description is abbreviate | omitted.
[0007]
The mold cooling pipe A according to the present invention has a water inlet connection port 3a that leads to the cooling water forward path and a water outlet connection port 3b that leads to the cooling water return path on one end side of the outer pipe 1 and the inner pipe 2 that are arranged concentrically. The hose connection base 3 provided with the above is configured so as to be rotatable in the circumferential direction, and is detachably inserted into the cooling hole C drilled from the back side of the mold B toward the cavity. At this time, in order to prevent the cooling pipe A from coming out of the cooling hole C due to the pressure of the cooling water or the like, a male screw 11 is formed on the outer periphery of the distal end portion of the outer pipe 1 and screwed into the mold B as in the illustrated embodiment. It fixes by making it fit, or it fixes by installing the presser plate (not shown) in the back side of the metal mold | die B, and making the one end part of the cooling pipe A contact | abut to the presser plate.
In this type of mold cooling pipe A, the inner pipe 2 is usually formed longer than the outer pipe 1, the inside of the inner pipe 2 is formed as a cooling water forward path, and the space between the outer pipe 1 and the inner pipe 2 is cooled. A section in which the water returned from the inner pipe 2 (cooling water forward path) reaches the cooling water return path between the outer pipe 1 and the inner pipe 2 through heat exchange between the mold and the water return path. Is the original cooling water hole, and should be distinguished from the cooling pipe mounting hole drilled from the back side of the mold B toward the cavity. Named and explained.
[0008]
The outer pipe 1 is used by cutting a metal pipe to a required length or by cutting a metal rod having a required length in the axial direction to form a hollow shape, and the outer diameter of the outer pipe 1 over its entire length. 3 is formed with a diameter smaller than the inner diameter of the mounting hole 31 formed therein, and the inner pipe 2 is concentrically inserted and arranged in the hollow interior, and is not inserted into the cooling hole C of the mold B at one end side. A hose connection base 3 is attached so as to be rotatable in the circumferential direction.
At this time, the outer pipe 1 is separately formed with a rotating shaft portion 12 for attaching the hose connection base 3 to be rotatable and an outer pipe main body portion 13 which forms a cooling water return path in cooperation with the inner pipe 2. Then, both may be integrated by post-processing to form one outer pipe. Also in this case, the outer diameter is formed smaller than the inner diameter of the mounting hole 31 formed in the hose connection base 3 over the entire length.
[0009]
In addition, one end side of the outer pipe 1, specifically, the rotary shaft portion 12 for rotatably mounting the hose connection cap 3, is a water inlet port formed in the hose connection cap 3 attached to the rotary shaft portion 12. The water inlet chamber 1a and the water outlet chamber 1b are arranged on the longitudinal axis at positions corresponding to the water inlet 3a and the water outlet 3b, respectively, and the water inlet 1a communicates with the water inlet 3a of the hose connector 3 in the water inlet 1a. 14 and the water discharge chamber 1b are formed with a water discharge port 15 communicating with the water discharge connection port 6. Therefore, the water inlet chamber 1a and the water outlet chamber 1b are in a communication state when the inner pipe 2 is not assembled in the outer pipe 1, and a sealing screw plug that seals one end opening of the outer pipe 1 in a watertight manner. 18 and the inner pipe 2 are partitioned by a combined screw cap 21 attached to one end of the inner pipe 2.
[0010]
And the concave groove for attaching the O-ring 4 which maintains the watertightness of the water inlet chamber 1a and the water outlet chamber 1b is formed in the both-sides position of the said water inlet 14 and the water outlet 15, respectively, and also the rotating shaft part 12 Stopper engaging grooves 16 that also serve as positioning when the hose connection base 3 is attached are formed at positions corresponding to both end portions of the hose connection base 3 attached to.
[0011]
The stopper engaging groove 16 is detachably attached to the stopper 5 for fixing the hose connection base 3 to the rotating shaft portion 12 of the outer pipe 1 in the circumferential direction and immovably fixing in the axial direction. This also serves as positioning when attaching the hose connection cap 3 at the same time, and is not necessarily required. That is, the hose connection base 3 can be rotated in the circumferential direction with respect to the rotary shaft portion 12 of the outer pipe 1 by attaching the stopper 5 to the outer periphery of the outer pipe 1 without the stopper engaging groove 16. It is possible to fix the hose connection cap 3 in a non-movable state, but if there is no mark for positioning when the hose connection cap 3 is attached to the rotary shaft portion 12 of the outer pipe 1, the water inlet connection formed in the hose connection cap 3 The positioning of the inlet 3a and the outlet connection port 3b and the inlet 14 and outlet 15 formed in the rotary shaft portion 12 becomes troublesome, and the stopper 5 is not easily moved due to vibration or the like. It is preferable to form the engaging groove 16. When the stopper engaging groove 16 is formed, at least one on the outer periphery of the rotary shaft portion 12 of the outer pipe 1, preferably two at substantially the same interval as the axial length of the hose connection base 3, Preferably, three or more hose connection caps 3 having different sizes can be formed.
[0012]
Furthermore, at one end of the outer pipe 1, specifically, at the outermost end of the rotating shaft portion 12, a rotating operation portion having a non-circular shape such as a hexagon or a quadrangle having the same or smaller diameter as the outer pipe 1. 17 is formed. The rotation operation unit 17 is used to engage the tool and rotate the outer pipe 1 in the circumferential direction to push the outer pipe into the cooling hole C of the mold B, or to screw and screw it. Is.
[0013]
The hose connection base 3 is made of a metal block material having a substantially cylindrical shape, polygonal column shape, rectangular column shape, or rectangular block shape having an appropriate length, and an inlet connection port 3a that leads to the cooling water outward path and the cooling water. The water outlet connection port 3b leading to the return path is formed in a direction orthogonal to the longitudinal axis direction, and the mounting hole 31 for inserting and attaching the rotary shaft portion 12 of the outer pipe 1 is inserted into the water inlet connection port 3a and the water outlet connection port 3b. It is formed in a penetrating shape along the longitudinal axis direction so as to communicate, and after the rotational shaft portion 12 of the outer pipe 1 is inserted into the mounting hole 31 in a skewered manner so as to be freely inserted and removed, the outer pipe 1 The rotating shaft portion 12 is fixed by the stopper 5 so as to be rotatable in the circumferential direction and immovable in the axial direction.
[0014]
As the stopper 5 used for the mold cooling pipe A, a general snap ring and a snap retainer standardized by JIS can be used. As shown in Fig. 5, a substantially U-shaped form can also be used. The stopper 5 ′ causes two stopper plates 51, 51 to be relatively hooked at substantially the same interval as the axial length of the hose connection base 3, and allows the outer pipe 1 to pass through these stopper plates 51, 51. Each of the insertion holes 52 and 52 is formed and an engagement hole that can be detachably engaged with the stopper engagement groove 16 formed on the outer periphery of the outer pipe 1 in the insertion hole 52 of at least one of the stop plate portions 51. 53 is formed continuously with a connecting hole 54 having a width smaller than that of the engaging hole 53, and is formed in a substantially U-shaped form as a whole.
Thus, when this stopper 5 ′ is used, the hose connection base 3 is previously formed into a substantially U-shaped stop before the hose connection base 3 is attached to the rotary shaft portion 12 of the outer pipe 1. 5 'is arranged at both ends of the hose connection base 3 so that the insertion holes 52, 52 of the both stop plate parts 51, 51 are aligned with the mounting holes 31 of the hose connection base 3, In this state, the hose connection base 3 is inserted into the rotating shaft portion 12 of the outer pipe 1 to engage the engaging hole 53 of the stopper 5 ′ with the stopper engaging groove 16 of the rotating shaft portion 12. As a result, the hose connection base 3 is attached to a predetermined position with respect to the rotary shaft portion 12 of the outer pipe 1 so as to be rotatable in the circumferential direction and not movable in the axial direction. Therefore, the hose connection base 3 can be attached to or detached from the rotary shaft portion 12 of the outer pipe 1 simply by engaging / disengaging the engaging hole 53 of the stopper 5 ′ with the stopper engaging groove 16 of the rotary shaft portion 12. It becomes possible.
Further, the stopper 5 ′ may have the insertion holes 52, 52 opened toward the tip of the stopper plates 51, 51 for the purpose of attaching to and detaching from the cooling pipe A. In order to prevent the stopper 5 ′ from falling off when engaging / disengaging from the groove 16, the opening width is desirably equal to or smaller than the connecting hole 54.
Further, the stopper 5 ′ may be installed so that the back plate portion 55 is on the hose 6 side by making a hole through which the hose 6 is passed in the back plate portion 55 in order to prevent the stopper 5 ′ from falling off.
[0015]
Next, a case where general snap rings 5a and 5b standardized by JIS are used will be described with reference to FIG. 1 and FIG. In this case, a stopper 5 a is attached in advance to a stopper engaging groove 16 a formed near the mold B of the rotary shaft portion 12 of the outer pipe 1, and the outer pipe is inserted into the mounting hole 31 of the hose connection base 3. 1 of the rotating shaft portion 12 is inserted in a skewered manner so that it can be freely inserted and removed, and one end side of the hose connection base 3 is brought into contact with the stop 5a, and then a stop engaging groove on the other end side of the hose connection base 3 A stopper 5b is attached to 16b. As a result, the hose connection base 3 is attached to the rotary shaft portion 12 of the outer pipe 1 at a predetermined position so that it can rotate in the circumferential direction and cannot move in the axial direction. The hose connection base 3 can be attached to or detached from the rotary shaft portion 12 of the outer pipe 1 simply by removing a certain stopper 5b from the stopper engaging groove 16b.
[0016]
The inner pipe 2 is incorporated in the outer pipe 1 in advance. At this time, when the one end opening of the outer pipe 1 is sealed in a watertight manner with the sealing screw plug 18 as in the illustrated embodiment, it is screwed with the dual-purpose screw plug 21 attached to one end of the inner pipe 2. However, when the outer pipe 1 or the rotary shaft portion 12 is formed so that the sealing screw plug 18 is not required by cutting the metal rod in the axial direction, it is preferable to form the female screw on the water inlet chamber 1a side. , Formed on the water discharge chamber 1b side.
[0017]
When the mold cooling pipe A is installed in the cooling hole C of the mold B, a ring-shaped packing is attached to the outer periphery of the other end of the outer pipe 1 and is inserted into the cooling hole 8 of the mold B. Or, as shown in the illustrated embodiment, a male screw 11 is engraved on the outer periphery of the other end of the outer pipe 1 and screwed into the cooling hole C of the mold B to be screwed in. Finally, a hose connection is made. A hose and a copper pipe 6 are connected to the water inlet port 3a and the water outlet port 3b of the base 3, respectively. That is, in the case of the mold cooling pipe A according to the present invention, after the outer pipe 1 in which the inner pipe 2 is previously installed is installed in the cooling hole C of the mold B, the hose is connected to the rotary shaft portion 12 of the outer pipe 1. The connection base 3 may be mounted, or the hose connection base 3 may be mounted in advance on the rotating shaft portion 12 of the outer pipe 1 and mounted in the cooling hole C of the mold B.
[0018]
Thus, the cooling water supplied from the water inlet 4 of the hose connector 3 passes through the water inlet chamber 1a and passes through the inner pipe 2 from one end side opening of the inner pipe 2, that is, the cooling water forward path, to cool the mold B. Heat is exchanged in the hole C to take away the heat of the mold. And the cooling water heat-exchanged in the cooling hole C of the metal mold B passes through the cooling water return path formed between the outer pipe 1 and the inner pipe 2, and flows out from the outlet chamber 1 b of the outer pipe 1 to the outlet port 3 b. It is discharged to the outside through.
[0019]
【The invention's effect】
Since the mold cooling pipe according to the present invention is configured in this manner, the hose connection cap can be easily detached from the rotating shaft portion of the outer pipe, and the cooling pipe mounted in the mold cooling hole. When pulling out, the cooling pipe (outer pipe) can be pulled out from the mold cooling hole before or after removing the hose connection cap from the outer pipe or the rotating shaft. Therefore, when the outer pipe and the inner pipe are clogged and replaced, and when the ring-shaped packing attached to the other end of the outer pipe is replaced, the operation becomes easy.
Moreover, since the outer diameter of the outer pipe is smaller than the inner diameter of the mounting hole over the entire length, by removing the hose connection base from the outer pipe, piping using a cooling block as shown in FIG. The outer pipe can be inserted and removed while the cooling block is installed in the mold, and the cooling block can be detached while the outer pipe is installed in the mold. Therefore, the diversity of the cooling pipe excluding the hose connection cap is excellent, and the manufacturing cost as the cooling pipe for the mold can be reduced.
[0020]
In particular, according to the cooling pipe for a mold according to the second aspect, the stopper engaging groove is also formed on the outer periphery of the outer pipe so as to be positioned when the hose connection base is attached. When attaching to the rotating shaft part of the pipe, accurate alignment of the water inlet and outlet ports formed in the hose connection base with the water inlet and outlet ports formed in the rotating shaft part can be easily performed. .
[0021]
In particular, according to the cooling pipe for a mold according to claim 3, the outer pipe is separately provided with a rotating shaft portion for rotatably inserting the hose connection base and an outer pipe main body portion serving as a return path of the cooling water. Since the outer pipe body part is formed by integrating the two by post-processing, the rotating shaft part is common even if the outer pipe body part is of various types with different lengths depending on the size and shape of the mold. It is possible to reduce the cost of products as mold cooling pipes.
[0022]
Further, according to the cooling pipe for a mold according to claim 4, in particular, a rotating operation part having the same diameter as or smaller than the outer diameter of the outer pipe is formed at one end of the outer pipe, and a tool is provided in the rotating operation part. Since the outer pipe is rotated in the circumferential direction by engaging the outer pipe, the outer pipe is pushed into the cooling hole of the mold or screwed and screwed in, so that a large tool is not required and excessive twisting is required. It is difficult to generate a squeezing force and the external thread at the tip of the outer pipe is not destroyed.
[0023]
And especially according to the cooling pipe for metal mold | dies of Claim 5, while forming the penetration hole which penetrates an outer pipe in the stop plate part which was made to heel relatively at the substantially same space | interval as the length of the axial direction of a hose connection cap, It has a substantially U-shaped configuration in which at least one engagement hole that is detachably engaged with a stopper engagement groove formed on the outer periphery of the outer pipe is formed, and the both stop plate portions are hose. Since the hose connection base is fixed so as not to move in the axial direction by disposing the engagement holes in both ends of the connection base and engaging the stop engagement grooves, the stop can be easily detached even without a tool. In addition, it is possible to prevent the stopper from being lost or falling between the molds when being attached to or detached from the mold.
[Brief description of the drawings]
1A is a cross-sectional view of a first embodiment, showing a state where it is mounted in a cooling hole of a mold, and FIG. 1B is a side view.
FIG. 2 is an exploded view according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view of a second embodiment, showing a state where it is mounted in a cooling hole of a mold.
FIG. 4 is a cross-sectional view of a third embodiment, showing a state where it is mounted in a cooling hole of a mold.
FIG. 5 is an exploded perspective view of a main part of a third embodiment.
FIG. 6 is a half sectional front view showing a conventional example.
[Explanation of symbols]
A: Mold cooling pipe B: Mold C: Cooling hole 1: Outer pipe 12: Rotating shaft part 13: Outer pipe body part 16a, 16b: Stopper engaging groove 17: Rotating operation part 5a, 5b: Stopping Tool 5 ': Stopper 51: Stop plate part 52: Insertion hole 53: Engagement hole 54: Connection hole 55: Back plate part

Claims

An inner pipe is arranged in the outer pipe to form a forward path and a return path for the cooling water, and a hose provided with an inlet connection port leading to the forward path and an outlet connection port leading to the return path on one end side of the outer pipe and the inner pipe. In a mold cooling pipe configured by attaching a connection base to be rotatable in a circumferential direction, a mounting hole for attaching the outer pipe to the hose connection base is formed in a penetrating shape, and the outer pipe is inserted into the mounting hole. A stopper that is inserted in a skewered manner so as to be freely inserted and removed, and that the outer diameter of the outer pipe is formed to be smaller than the inner diameter of the mounting hole over the entire length, and the hose connection base is detachably attached to the outer periphery of the outer pipe. A mold cooling pipe, wherein the mold cooling pipe is fixed so as not to move in the axial direction.

2. A stopper engaging groove that also serves as a positioning when attaching the hose connection base is formed on an outer periphery of the outer pipe, and the stopper is detachably attached to the stopper engaging groove. Cooling pipe for mold.

The mold cooling pipe according to claim 1 or 2, wherein the outer pipe is formed of a rotating shaft portion for rotatably mounting the hose connection base and an outer pipe main body portion serving as a return path for cooling water.

The outer pipe can be turned in the circumferential direction by forming a turning operation part at one end of the outer pipe that is the same as or smaller than the outer diameter of the outer pipe, and by engaging a tool with the turning operation part. The mold cooling pipe according to any one of claims 1 to 3.

The stopper is formed with an insertion hole through which the outer pipe penetrates in a stopper plate portion that is relatively bent at substantially the same interval as the axial length of the hose connection base, and at least one of them is formed on the outer periphery of the outer pipe. A substantially U-shaped configuration in which engagement holes that are detachably engaged with the stopper engagement grooves are formed, and the both stop plate portions are arranged at both ends of the hose connection base. The die according to any one of claims 1 to 4, wherein the hose connection base is fixed so as not to move in the axial direction by engaging the engagement hole with the stopper engagement groove. For cooling pipes.

An inner pipe is arranged in the outer pipe to form an outward path and a return path of the cooling water, and a hose connection base having an inlet connection port leading to the forward path and an outlet connection port leading to the return path on one end side of the outer pipe and the inner pipe. Is an outer pipe used for a mold cooling pipe configured to be rotatably mounted in the circumferential direction, and the outer diameter of the outer pipe is smaller than the inner diameter of the mounting hole formed in the hose connection base over the entire length. So that it can be inserted into and removed from the hose connection cap and the cooling hole of the mold and can be pivoted in the circumferential direction, and the outer diameter of the outer pipe is the same as the outer diameter of the outer pipe. An outer part of the mold cooling pipe is characterized in that a rotation operation part having a smaller diameter is formed and the outer pipe can be rotated in the circumferential direction by engaging a tool with the rotation operation part. pipe.