Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
JP4261030B2 - Manufacturing method of resin mold - Google Patents
[go: Go Back, main page]

JP4261030B2 - Manufacturing method of resin mold - Google Patents

Manufacturing method of resin mold Download PDF

Info

Publication number
JP4261030B2
JP4261030B2 JP2000175738A JP2000175738A JP4261030B2 JP 4261030 B2 JP4261030 B2 JP 4261030B2 JP 2000175738 A JP2000175738 A JP 2000175738A JP 2000175738 A JP2000175738 A JP 2000175738A JP 4261030 B2 JP4261030 B2 JP 4261030B2
Authority
JP
Japan
Prior art keywords
mold
mold body
cavity
metal particles
resin
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
JP2000175738A
Other languages
Japanese (ja)
Other versions
JP2001353724A (en
Inventor
文人 上羽
実基彦 木村
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 Motor Co Ltd
Original Assignee
Honda Motor 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 Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2000175738A priority Critical patent/JP4261030B2/en
Publication of JP2001353724A publication Critical patent/JP2001353724A/en
Application granted granted Critical
Publication of JP4261030B2 publication Critical patent/JP4261030B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は樹脂成形金型の製造方法に関する。
【0002】
【従来の技術】
樹脂成形金型として、例えば▲1▼特開平7−285169号公報「樹脂成形用金型」や▲2▼実開平6−9744号公報「金型」が知られている。
上記▲1▼は、同公報の図1によれば、金型本体14(符号は公報に記載の符号を流用)を加熱又は冷却のために多孔質焼結金属で形成し、金型本体14のキャビティに金属、合成樹脂又はセラッミクなどの表面被膜12を形成したものである。
上記▲2▼は、同公報の図1によれば、金型1のキャビティ2表面近傍に冷却のために多孔質材の部分域3を形成し、この部分域3にメッキ等の表層7を形成し、この表層7の反対から部分域3に給水路4及び排水路5を接続したものである。
【0003】
【発明が解決しようとする課題】
しかし、上記▲1▼の樹脂成形用金型では、金型本体14を多孔質焼結金属で形成し、金型本体14のキャビティに金属、合成樹脂又はセラッミクなどの表面被膜12で覆っただけのものなので、ショットを重ねると多孔質焼結金属が潰され、キャビティの変形を招く。
また、表面被膜12を合成樹脂又はセラッミクで構成する場合には、金型本体14の多孔質焼結金属と表面被膜12の合成樹脂又はセラッミクとは単に接触状態にあり、これらの金型本体14と表面被膜12との熱伝導性に疑問が残る。
上記▲2▼の金型では、多孔質材の部分域3に表層7をメッキ等で形成したので、部分域3と表層7との熱伝導性は改善されるものの、上記▲1▼の樹脂成形用金型と同様、キャビティの剛性が低い。
【0004】
そこで、本発明の目的は、剛性が高く、且つ十分に熱伝導性の高い樹脂成形金型を製造することのできる製造方法を提供することにある。
【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の樹脂成形金型の製造方法は、キャビティ面を有する金型本体を製造する工程と、この金型本体のキャビティ面の裏側に金属粒を配設する工程と、この金属粒を金型本体に配設した状態で焼結する工程と、得られた焼結金属層を覆うと共に、焼結金属層に流通させる冷却用媒体又は加熱用媒体の漏れを防止する蓋部材を金型本体に付設する工程とから構成したことを特徴とする。
【0006】
金型本体のキャビティ面の裏側に金属粒を配設し、金属粒を金型本体に配設した状態で焼結することで、金型本体と金属粒とを溶融状態にして接合状態にする。
金型本体を成形圧に耐えられるようにキャビティ面を含む一体構造で製造し、焼結金属層に負荷がかからないようにしたため、金型強度が十分に確保される。
また、金型本体に金属粒を密着させたので、金型本体から金属粒へ又は金属粒から金型本体への伝導が円滑になり、樹脂成形金型の熱伝導性を高めることができる。
【0007】
【発明の実施の形態】
本発明の実施の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。
図1は本発明に係る樹脂成形金型の斜視図である。
樹脂金型装置20は、樹脂成形金型としての可動側金型30と樹脂成形金型としての固定側金型40とから構成するものであって、可動側金型30に成形凸部32を形成し、固定側金型40に成形凹部42を形成し、これらの成形凹部42及び成形凸部32を合せることで樹脂成形品Wを成形するためのキャビティ50を形成するものである。
【0008】
図2は図1の2−2線断面図であり、可動側金型30の縦断面を示す。
可動側金型30は、金型本体31に形成した成形凸部32と、金型本体31に形成した凹部33と、この凹部33内に形成する多孔質の焼結金属層34と、これらの焼結金属層34及び凹部33を一括して覆う蓋部材35と、金型本体31に形成した複数の入水口36・・・(・・・は複数個を示す。以下同じ)及び排水口37・・・とからなる。なお、本図では、入水口36・・・及び排水口37・・・は一個のみを示す。
固定側金型40は、金型本体41に成形凹部42を備え、金型本体41に可動側金型30と略同一の凹部、焼結金属層、蓋部材、入水口及び排水口を備えるものであり、詳細な説明は省略する。
【0009】
図3は図1の3−3線断面図であり、可動側金型30の横断面を示す。
凹部33は、底33hがキャビティ50に近づくように金型本体31に開けたものであり、キャビティ50の強度を高めるための第1のリブ38・・・を備えたものである。
焼結金属層34は、熱媒体(不図示)としての冷却用媒体又は加熱用媒体を流通させるための部材であり、熱媒体は、焼結金属層34を流通させることで可動側金型30を強制冷却又は強制加熱を図るための媒体である。
【0010】
蓋部材35は、焼結金属層34及び凹部33を一括して覆うベース部35aと、このベース部35aに形成する第2のリブ39・・・とからなる部材であり、第1のリブ38・・・の先端にベース部35aを当てることで第1のリブ38・・・と共にキャビティ50の強度を高める部材である。
第2のリブ39・・・は、第1のリブ38・・・の軸線C・・・上に配置することで、可動側金型30の放熱効果の促進を図ることを狙ったものである。すなわち、第1のリブ38・・・は、補強部材であると共に熱伝導部材でもある。そこで、第1のリブ38・・・と第2のリブ39・・・を一直線上に並べれば、熱の流れが円滑となり、金型本体31の放熱機能を格段に高めることができる。
【0011】
すなわち、可動側金型30は、凹部33の底33hがキャビティ50に近づくように凹部33を金型本体31に開け、この金型本体31の凹部33内に焼結金属層34を形成し、凹部33を蓋部材35で塞ぎ、焼結金属層34に冷却用媒体又は加熱用媒体としての熱媒体(不図示)を流通させることで、金型本体31を強制冷却又は強制加熱することのできる樹脂成形金型であって、凹部33の底33hから蓋部材35に至る第1のリブ38・・・を金型本体31に付設すると共に、蓋部材35に外側へ延びる第2のリブ39・・・を付設したものである。
【0012】
可動側金型30は、凹部33の底33hがキャビティ50に近づくように凹部33を金型本体31に開け、この金型本体31の凹部33内に焼結金属層34を形成し、凹部33を蓋部材35で塞ぎ、焼結金属層34に冷却用媒体又は加熱用媒体としての熱媒体(不図示)を流通させるようにしたので、キャビティ50の強度を維持しつつ熱媒体の通路を形成することができる。この結果、耐久性を向上させた樹脂成形金型を得ることができる。
【0013】
さらに、言及すれば、キャビティ50へ樹脂を射出若しくは投入すると樹脂成形圧が金型本体31にかかる。しかし、金型本体31を成形圧に耐えられるようにキャビティ50面を含む一体構造で製造し、焼結金属層34に負荷がかからないようにしたため、金型強度が十分に確保される。このとき、第1のリブ38・・・並びに蓋部材35が設けられているとこれらが補強部材となって金型本体31の変形、すなわち、キャビティ50の変形をさらに効果的に防止する役割を果たす。金型本体31に第1のリブ38・・・を付設し、これらの第1のリブ38・・・の先端を蓋部材35で支持させる構造を採用したことでキャビティ50の形状を良好に保てる。
【0014】
また、凹部33の底33hから蓋部材35に至る第1のリブ38・・・を金型本体31に付設すると共に、蓋部材35に外側へ延びる第2のリブ39・・・を付設したので、金型本体31の放熱効果の向上を図ることができる。
可動側金型30は、第1のリブ38・・・の軸線C・・・上に第2のリブ39・・・を配置したので、金型本体31の放熱効果のさらなる促進を図ることができる。この結果、可動側金型30の加熱・冷却サイクルの短縮を図ることができ、成形コストの削減を図ることができる。
【0015】
図4は図1の4−4断面図であり、可動側金型30の平面断面を示す。
可動側金型30は、言い換えれば、第1のリブ38・・・を残すようなかたちで、金型本体31に凹部33を形成したものであり、結果として、凹部33は複数の流路33A〜33F(ここでは、凹部33を流路33A〜33Fと呼ぶことにする)を形成したかたちになり、それぞれの流路33A〜33Fに焼結金属層34を設け、それぞれの流路33A〜33Fに入水口36・・・及び排水口37・・・を設けたものとも言える。
従って、凹部33をそれぞれの流路33A〜33Fに仕切ることで、熱媒体(不図示)を均一に流すことができるので、金型温度のばらつきの低減を図ることができる。
【0016】
以上に述べた可動側金型30(樹脂成形金型)の作用を次に説明する。
図5(a)〜(d)は本発明に係る樹脂成形金型の第1作用説明図であり、可動側金型30(図3参照)の製作手順の一例を示す。
(a)において、金属ブロック52に成形凸部32及び凹部33を形成し、金型本体31を製作する。
(b)において、鉄系金属、アルミニウム系金属若しくはステンレス鋼の金属粒53・・・を凹部33に充填する。
(c)において、凹部33内に金属粒53・・・を充填済みの金型本体31を焼結炉54に入れ、金属粒53・・・同士を焼結させ、焼結金属層34を形成する。
【0017】
(d)において、蓋部材35で焼結金属層34及び凹部33を一括して覆い、ボルト締め又は熱溶着を行ない、凹部33を密封する。その後、成形凸部32面の仕上を行なう。例えば、成形凸部32面と凹部33の底33h面との厚さをtとするときに、厚さtを2mmから5mmの範囲に設定する。ここで、厚さtが2mm以下では成形凸部32の強度が不足する。また、5mm以上では冷却効率又は熱効率の悪化を招く。
【0018】
図6は本発明に係る樹脂成形金型の第2作用説明図である。
実施例ではリブ付きで説明したが、金型本体のキャビティ面が従来例の如き、被膜等でないため、リブなしでよいことは言うまでもない。ただし、キャビティ50の強度を維持しつつ熱媒体の通路を形成することができるため、リブ付きにするとさらに耐久性を向上させた樹脂成形金型を得ることができる。また、凹部33の底33hから蓋部材35に至る第1のリブ38・・・を金型本体31に付設すると共に、蓋部材35に外側へ延びる第2のリブ39・・・を付設したので、金型本体31の放熱効果の向上を図ることができる。
すなわち、第1のリブ38・・・は、補強部材であると共に熱伝導部材でもある。そこで、第1のリブ38・・・と第2のリブ39・・・を一直線上に並べれば、熱の流れが円滑となり、金型本体31の放熱機能を格段に高めることができる。
【0019】
例えば、可動側金型30は、第1のリブ38・・・の軸線C・・・上に第2のリブ39・・・を配置したので、第1のリブ38から第2のリブ39に矢印▲2▼の如く熱が流れ、第2のリブ39から大気中に矢印▲3▼・・・の如く放熱させる。すなわち、金型本体31の放熱効果のさらなる促進を図ることができる。この結果、金型の加熱・冷却サイクルの短縮を図ることができ、成形コストの削減を図ることができる。
【0020】
図7は本発明に係る樹脂成形金型の製造方法の手順を示すフロー図である。なお、ST××はステップ番号を示す(符号は図2及び図5参照)。
ST01(金型本体の製造工程):キャビティ50面を有する金型本体31を製造する。
ST02(金属粒の配設工程):金型本体31のキャビティ50面の裏側に金属粒53・・・を配設する。
ST03(金属粒の焼結工程):金属粒53・・・を金型本体31に配設した状態で焼結する。
ST04(蓋部材の付設工程):得られた焼結金属層34を覆うと共に、焼結金属層34に流通させる熱媒体としての冷却用媒体又は加熱用媒体の漏れを防止する蓋部材35を金型本体31に付設する。
【0021】
すなわち、樹脂成形金型としての可動側金型30の製造方法は、キャビティ50面を有する金型本体31を製造する工程と、この金型本体31のキャビティ50面の裏側に金属粒53・・・を配設する工程と、この金属粒53・・・を金型本体31に配設した状態で焼結する工程と、得られた焼結金属層34を覆うと共に、焼結金属層34に流通させる熱媒体としての冷却用媒体又は加熱用媒体の漏れを防止する蓋部材35を金型本体31に付設する工程とから構成するものである。
【0022】
金型本体31のキャビティ50面の裏側に金属粒53・・・を配設し、金属粒53・・・を金型本体31に配設した状態で焼結することで、金型本体31と金属粒53・・・とを溶融状態にして接合状態することができるので、可動側金型30の熱伝導性の向上が図れると共に、成形圧に対してキャビティ50面の強度を高めることができる。次図でその詳細を述べる。
【0023】
図8(a)〜(d)は本発明に係る樹脂成形金型の製造方法を用いて製造した樹脂成形金型の特徴を示す模式図である。
(a)において、焼結炉に入れない可動側金型100(樹脂成形金型)は、金属粒103・・・と金型本体101とが溶融接合していないので強度、熱伝導の点で劣る。すなわち、金型本体101と金属粒103・・・とは点接触なので、成形圧により金属粒103・・・の一点に荷重が集中し、焼結金属層104が変形しやすい。従って、金属粒103・・・が成形圧を点で受けるため負担が大きく、金型本体101が凹むことがある。
【0024】
(b)において、可動側金型30は、金型本体31の凹部33に金属粒53・・・を入れ、金型本体31と金属粒53・・・とを焼結炉54(図5参照)に一緒に入れ金属粒53・・・を焼結することで、金属粒53・・・と金型本体31とは、図の如く溶融状態になり、金型強度が向上し、熱伝導性も改善される。
【0025】
(c)において、可動側金型30は、金型本体31と金属粒53,53とが溶融状態にあるので、金属粒53,53同士のピッチL1は小さい。従って、成形圧が矢印の如く金型本体31に加わるときに、金型本体31の歪は小さい。
(d)において、可動側金型100は、金型本体101と金属粒103,103とが点接触なので、金属粒103,103同士のピッチL2は大きい。従って、成形圧が矢印の如く金型本体101に加わるときに、金型本体101の歪が大きくなる。
【0026】
すなわち、可動側金型30は、成形圧で可動側金型30に大きな力が加わるがキャビティ50(図3参照)面の裏面を金属粒で支え、且つ、これらの金属粒53・・・をキャビティ50面の裏面に密着させたので、金属粒53・・・の支持効率が高まり、金型本体31の全体的な剛性をさらに高めることができる。また、金型本体31に金属粒53・・・(1個のみを示す)を密着させたので、金型本体31から金属粒53・・・へ又は金属粒53・・・から金型本体31への伝導が円滑になり、可動側金型30の熱伝導性を高めることができる。
【0027】
尚、実施の形態では図3に示すように、第1・第2の突起をリブ形状(第1のリブ38・・・及び第2のリブ39・・・)としたが、これに限るものではなく、第1・第2の突起は、ピン又は棒形状であってもよい。
【0028】
【発明の効果】
本発明は上記構成により次の効果を発揮する。
請求項1は、キャビティ面を有する金型本体を製造する工程と、この金型本体のキャビティ面の裏側に金属粒を配設する工程と、この金属粒を金型本体に配設した状態で焼結する工程と、得られた焼結金属層を覆うと共に、焼結金属層に流通させる冷却用媒体又は加熱用媒体の漏れを防止する蓋部材を金型本体に付設する工程とから構成したので、金型本体を成形圧に耐えられるようにキャビティ面を含む一体構造で製造し、焼結金属層に負荷がかからないようにしたため、金型強度が十分に確保される。また、金属粒を金型本体に配設した状態で焼結するようにしたので、金型本体と金属粒とを溶融状態にして接合状態することができる。
すなわち、キャビティの裏面を金属粒で支え、且つ、これらの金属粒をキャビティ面の裏面に密着させたので、金属粒の支持効率が高まり、金型本体の全体的な剛性をさらに高めることができる。また、金型本体から金属粒へ又は金属粒から金型本体への伝導が円滑になり、樹脂成形金型の熱伝導性を高めることができる。
【図面の簡単な説明】
【図1】本発明に係る樹脂成形金型の斜視図
【図2】図1の2−2線断面図
【図3】図1の3−3線断面図
【図4】図1の4−4断面図
【図5】本発明に係る樹脂成形金型の第1作用説明図
【図6】本発明に係る樹脂成形金型の第2作用説明図
【図7】本発明に係る樹脂成形金型の製造方法の手順を示すフロー図
【図8】本発明に係る樹脂成形金型の製造方法を用いて製造した樹脂成形金型の特徴を示す模式図
【符号の説明】
30…樹脂成形金型(可動側金型)、31…金型本体、34…焼結金属層、35…蓋部材、50…キャビティ、53…金属粒。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a resin mold.
[0002]
[Prior art]
As resin molding dies, for example, (1) Japanese Patent Laid-Open No. 7-285169 “Resin Mold” and (2) Japanese Utility Model Publication No. 6-9744 “Mold” are known.
According to the above (1), according to FIG. 1 of the publication, the mold body 14 (the reference numeral is the same as the reference numeral) is formed of a porous sintered metal for heating or cooling. A surface coating 12 such as metal, synthetic resin or ceramic is formed in the cavity.
According to the above (2), according to FIG. 1 of the publication, a partial region 3 of a porous material is formed in the vicinity of the surface of the cavity 2 of the mold 1 for cooling, and a surface layer 7 such as plating is formed in the partial region 3. The water supply channel 4 and the drainage channel 5 are connected to the partial area 3 from the opposite side of the surface layer 7.
[0003]
[Problems to be solved by the invention]
However, in the resin molding die of the above (1), the mold body 14 is formed of a porous sintered metal, and the cavity of the mold body 14 is simply covered with the surface coating 12 such as metal, synthetic resin or ceramic. Therefore, when the shots are repeated, the porous sintered metal is crushed and the cavity is deformed.
When the surface coating 12 is composed of a synthetic resin or ceramic, the porous sintered metal of the mold body 14 and the synthetic resin or ceramic of the surface coating 12 are simply in contact with each other, and these mold bodies 14 are in contact with each other. And the thermal conductivity of the surface coating 12 remain questionable.
In the above mold (2), since the surface layer 7 is formed by plating or the like in the partial region 3 of the porous material, the thermal conductivity between the partial region 3 and the surface layer 7 is improved, but the resin of the above (1) Like the molding die, the cavity has low rigidity.
[0004]
Therefore, an object of the present invention is to provide a production method capable of producing a resin mold having high rigidity and sufficiently high thermal conductivity.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a method of manufacturing a resin mold according to claim 1 includes a step of manufacturing a mold body having a cavity surface, and a step of disposing metal particles on the back side of the cavity surface of the mold body. And a step of sintering the metal particles in a state where they are disposed in the mold body, and covering the obtained sintered metal layer and preventing leakage of a cooling medium or a heating medium flowing through the sintered metal layer. And a step of attaching the lid member to the mold body.
[0006]
Metal particles are disposed on the back side of the cavity surface of the mold body, and sintered in a state where the metal particles are disposed on the mold body, the mold body and the metal particles are melted to be in a joined state. .
Since the mold body is manufactured in an integrated structure including the cavity surface so as to withstand the molding pressure and the sintered metal layer is not subjected to a load, the mold strength is sufficiently ensured.
In addition, since the metal particles are brought into close contact with the mold body, conduction from the mold body to the metal particles or from the metal particles to the mold body is smooth, and the thermal conductivity of the resin-molded mold can be improved.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a resin molding die according to the present invention.
The resin mold apparatus 20 includes a movable mold 30 as a resin mold and a fixed mold 40 as a resin mold, and a molding convex portion 32 is provided on the movable mold 30. The cavity 50 for molding the resin molded product W is formed by forming the molding recess 42 in the fixed mold 40 and combining the molding recess 42 and the molding projection 32.
[0008]
FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1 and shows a vertical cross section of the movable mold 30.
The movable side mold 30 includes a molding protrusion 32 formed on the mold body 31, a recess 33 formed on the mold body 31, a porous sintered metal layer 34 formed in the recess 33, and these A lid member 35 that collectively covers the sintered metal layer 34 and the recess 33, and a plurality of water inlets 36 (... are the same; the same applies hereinafter) and a water outlet 37 formed in the mold body 31. It consists of ... In addition, in this figure, the water inlet 36 ... and the drain port 37 ... show only one piece.
The fixed-side mold 40 includes a mold body 41 having a molding recess 42, and the mold body 41 includes substantially the same recess as the movable-side mold 30, a sintered metal layer, a lid member, a water inlet, and a drain port. Therefore, detailed description is omitted.
[0009]
3 is a cross-sectional view taken along the line 3-3 in FIG.
The recess 33 is formed in the mold main body 31 so that the bottom 33 h approaches the cavity 50, and includes first ribs 38... For increasing the strength of the cavity 50.
The sintered metal layer 34 is a member for circulating a cooling medium or a heating medium as a heat medium (not shown), and the heat medium is made to flow through the sintered metal layer 34 so that the movable-side mold 30 can be circulated. Is a medium for forcibly cooling or forcibly heating.
[0010]
The lid member 35 is a member that includes a base portion 35a that collectively covers the sintered metal layer 34 and the concave portion 33, and second ribs 39 that are formed in the base portion 35a. Is a member that increases the strength of the cavity 50 together with the first ribs 38 ... by applying the base portion 35a to the tip of the ....
The second ribs 39... Are intended to promote the heat dissipation effect of the movable mold 30 by being arranged on the axis C... Of the first ribs 38. . That is, the first ribs 38 ... are not only a reinforcing member but also a heat conducting member. Therefore, if the first ribs 38 and the second ribs 39 are arranged in a straight line, the heat flow becomes smooth and the heat radiation function of the mold body 31 can be remarkably enhanced.
[0011]
That is, the movable mold 30 opens the recess 33 in the mold body 31 so that the bottom 33h of the recess 33 approaches the cavity 50, and forms the sintered metal layer 34 in the recess 33 of the mold body 31. The mold body 31 can be forcibly cooled or forcibly heated by closing the recess 33 with the lid member 35 and circulating a cooling medium or a heating medium (not shown) as a heating medium through the sintered metal layer 34. It is a resin mold, and first ribs 38... Extending from the bottom 33 h of the recess 33 to the lid member 35 are attached to the mold body 31, and the second rib 39.・ Attached.
[0012]
The movable mold 30 opens the recess 33 in the mold body 31 so that the bottom 33 h of the recess 33 approaches the cavity 50, forms a sintered metal layer 34 in the recess 33 of the mold body 31, and the recess 33 Is covered with a lid member 35, and a heating medium (not shown) as a cooling medium or a heating medium is circulated through the sintered metal layer 34, so that a passage for the heating medium is formed while maintaining the strength of the cavity 50. can do. As a result, a resin mold having improved durability can be obtained.
[0013]
In addition, when resin is injected or injected into the cavity 50, resin molding pressure is applied to the mold body 31. However, since the mold body 31 is manufactured with an integral structure including the cavity 50 surface so as to withstand the molding pressure and the sintered metal layer 34 is not subjected to a load, the mold strength is sufficiently ensured. At this time, if the first ribs 38... And the lid member 35 are provided, these serve as reinforcing members to further effectively prevent deformation of the mold body 31, that is, deformation of the cavity 50. Fulfill. The first ribs 38... Are attached to the mold body 31, and the end of the first ribs 38. .
[0014]
Further, the first ribs 38... Extending from the bottom 33 h of the recess 33 to the lid member 35 are attached to the mold body 31, and the second ribs 39. The heat dissipation effect of the mold body 31 can be improved.
Since the movable-side mold 30 has the second ribs 39... Disposed on the axis C... Of the first ribs 38..., The heat dissipation effect of the mold body 31 can be further promoted. it can. As a result, the heating / cooling cycle of the movable mold 30 can be shortened, and the molding cost can be reduced.
[0015]
4 is a cross-sectional view taken along the line 4-4 of FIG.
In other words, the movable mold 30 is formed by forming the recess 33 in the mold body 31 so as to leave the first ribs 38... As a result, the recess 33 has a plurality of flow paths 33 </ b> A. To 33F (here, the concave portion 33 will be referred to as flow paths 33A to 33F), a sintered metal layer 34 is provided in each flow path 33A to 33F, and each flow path 33A to 33F is formed. It can be said that the water inlets 36... And the drain ports 37.
Therefore, since the heat medium (not shown) can be made to flow uniformly by partitioning the recess 33 into the respective flow paths 33A to 33F, variation in mold temperature can be reduced.
[0016]
Next, the operation of the movable mold 30 (resin mold) described above will be described.
FIGS. 5A to 5D are first operation explanatory views of the resin mold according to the present invention, and show an example of the manufacturing procedure of the movable mold 30 (see FIG. 3).
In (a), the molding convex part 32 and the recessed part 33 are formed in the metal block 52, and the metal mold body 31 is manufactured.
In (b), the recess 33 is filled with metal particles 53 of iron-based metal, aluminum-based metal, or stainless steel.
In (c), the mold body 31 filled with the metal particles 53... In the recess 33 is placed in the sintering furnace 54, and the metal particles 53. To do.
[0017]
In (d), the sintered metal layer 34 and the concave portion 33 are collectively covered with the lid member 35, bolted or thermally welded, and the concave portion 33 is sealed. Thereafter, the surface of the molding convex portion 32 is finished. For example, when the thickness of the molding convex portion 32 surface and the bottom 33h surface of the concave portion 33 is t, the thickness t is set in the range of 2 mm to 5 mm. Here, when the thickness t is 2 mm or less, the strength of the molding convex portion 32 is insufficient. On the other hand, if it is 5 mm or more, the cooling efficiency or the thermal efficiency is deteriorated.
[0018]
FIG. 6 is an explanatory view of a second action of the resin mold according to the present invention.
Although the embodiment has been described with ribs, it is needless to say that the cavity surface of the mold body is not a coating as in the conventional example, so that ribs may be omitted. However, since the passage of the heat medium can be formed while maintaining the strength of the cavity 50, a resin-molding die with further improved durability can be obtained if ribs are provided. Further, the first ribs 38... Extending from the bottom 33 h of the recess 33 to the lid member 35 are attached to the mold body 31, and the second ribs 39. The heat dissipation effect of the mold body 31 can be improved.
That is, the first ribs 38 ... are not only a reinforcing member but also a heat conducting member. Therefore, if the first ribs 38 and the second ribs 39 are arranged in a straight line, the heat flow becomes smooth and the heat radiation function of the mold body 31 can be remarkably enhanced.
[0019]
For example, the movable side mold 30 has the second ribs 39... Arranged on the axis C... Of the first ribs 38. Heat flows as indicated by arrow (2), and heat is radiated from the second rib 39 into the atmosphere as indicated by arrow (3). In other words, the heat dissipation effect of the mold body 31 can be further promoted. As a result, the heating / cooling cycle of the mold can be shortened, and the molding cost can be reduced.
[0020]
FIG. 7 is a flowchart showing the procedure of the method for producing a resin molding die according to the present invention. Note that STxx indicates a step number (see FIG. 2 and FIG. 5 for symbols).
ST01 (Mold body manufacturing process): A mold body 31 having a cavity 50 surface is manufactured.
ST02 (Metal grain arrangement step): Metal grains 53 are arranged on the back side of the cavity 50 surface of the mold body 31.
ST03 (metal particle sintering step): The metal particles 53... Are sintered in a state where they are disposed on the mold body 31.
ST04 (Attaching process of lid member): The lid member 35 that covers the obtained sintered metal layer 34 and prevents leakage of a cooling medium or a heating medium as a heat medium to be circulated through the sintered metal layer 34 is made of gold. Attached to the mold body 31.
[0021]
That is, the manufacturing method of the movable mold 30 as a resin mold includes a process of manufacturing a mold body 31 having a cavity 50 surface, and metal particles 53... On the back side of the cavity 50 surface of the mold body 31. , A step of sintering the metal particles 53 in a state of being disposed in the mold main body 31, and covering the obtained sintered metal layer 34, And a step of attaching a lid member 35 for preventing leakage of a cooling medium or a heating medium as a circulating heat medium to the mold main body 31.
[0022]
Metal particles 53 are disposed on the back side of the cavity 50 surface of the mold body 31 and sintered in a state in which the metal particles 53 are disposed on the mold body 31. Since the metal particles 53 can be melted and joined, the thermal conductivity of the movable mold 30 can be improved and the strength of the cavity 50 surface against the molding pressure can be increased. . The details are described in the following figure.
[0023]
FIGS. 8A to 8D are schematic views showing the characteristics of a resin molding die manufactured using the method for manufacturing a resin molding die according to the present invention.
In (a), the movable side mold 100 (resin molding mold) that cannot be put into the sintering furnace is not melt-bonded with the metal grains 103... Inferior. That is, since the mold body 101 and the metal particles 103 are in point contact, the load is concentrated on one point of the metal particles 103 by the molding pressure, and the sintered metal layer 104 is likely to be deformed. Therefore, since the metal particles 103 ... receive the molding pressure at a point, the load is large, and the mold body 101 may be recessed.
[0024]
In (b), the movable side mold 30 puts metal particles 53... Into the recess 33 of the mold body 31, and the mold body 31 and the metal particles 53. ) And the metal particles 53... And the mold body 31 are melted as shown in the figure, the mold strength is improved, and the thermal conductivity is increased. Will be improved.
[0025]
In (c), since the mold body 31 and the metal particles 53, 53 are in a molten state, the movable mold 30 has a small pitch L1 between the metal particles 53, 53. Therefore, when the molding pressure is applied to the mold body 31 as shown by the arrow, the distortion of the mold body 31 is small.
In (d), the movable side mold 100 has a large pitch L2 between the metal grains 103 and 103 because the mold body 101 and the metal grains 103 and 103 are in point contact. Therefore, when the molding pressure is applied to the mold body 101 as shown by the arrow, the distortion of the mold body 101 increases.
[0026]
That is, the movable mold 30 applies a large force to the movable mold 30 with molding pressure, but supports the back surface of the cavity 50 (see FIG. 3) surface with metal particles, and supports these metal particles 53. Since it is made to adhere to the back surface of the cavity 50 surface, the support efficiency of the metal grains 53 is increased, and the overall rigidity of the mold body 31 can be further increased. Further, since the metal grains 53 (only one is shown) are brought into close contact with the mold body 31, the mold body 31 is transferred to the metal grains 53, or from the metal grains 53 ... to the mold body 31. Therefore, the heat conductivity of the movable mold 30 can be increased.
[0027]
In the embodiment, as shown in FIG. 3, the first and second protrusions are formed in a rib shape (first rib 38... And second rib 39...). Instead, the first and second protrusions may have a pin or bar shape.
[0028]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
According to a first aspect of the present invention, there is provided a step of manufacturing a mold body having a cavity surface, a step of disposing metal particles on the back side of the cavity surface of the mold body, and a state in which the metal particles are disposed on the mold body. It comprises a step of sintering, and a step of covering the obtained sintered metal layer and attaching a lid member for preventing leakage of a cooling medium or a heating medium to be circulated through the sintered metal layer to the mold body. Therefore, the mold body is manufactured in an integral structure including the cavity surface so as to withstand the molding pressure, and the sintered metal layer is not subjected to a load, so that the mold strength is sufficiently ensured. Further, since the metal particles are sintered in a state of being disposed in the mold body, the mold body and the metal particles can be brought into a molten state and bonded.
That is, since the back surface of the cavity is supported by metal particles and these metal particles are adhered to the back surface of the cavity surface, the support efficiency of the metal particles is increased, and the overall rigidity of the mold body can be further increased. . In addition, conduction from the mold body to the metal particles or from the metal particles to the mold body becomes smooth, and the thermal conductivity of the resin-molding mold can be improved.
[Brief description of the drawings]
1 is a perspective view of a resin mold according to the present invention. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1. FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. FIG. 5 is a diagram illustrating a first operation of the resin molding die according to the present invention. FIG. 6 is a diagram illustrating a second operation of the resin molding die according to the present invention. FIG. 8 is a flowchart showing the procedure of the mold manufacturing method. FIG. 8 is a schematic diagram showing the characteristics of the resin molding mold manufactured by using the resin molding mold manufacturing method according to the present invention.
DESCRIPTION OF SYMBOLS 30 ... Resin molding die (movable side die), 31 ... Mold main body, 34 ... Sintered metal layer, 35 ... Lid member, 50 ... Cavity, 53 ... Metal grain.

Claims (1)

キャビティ面を有する金型本体を製造する工程と、
この金型本体の前記キャビティ面の裏側に金属粒を配設する工程と、
この金属粒を前記金型本体に配設した状態で焼結する工程と、
得られた焼結金属層を覆うと共に、焼結金属層に流通させる冷却用媒体又は加熱用媒体の漏れを防止する蓋部材を前記金型本体に付設する工程と、からなる樹脂成形金型の製造方法。
Manufacturing a mold body having a cavity surface;
Disposing metal particles on the back side of the cavity surface of the mold body;
Sintering the metal particles in a state of being disposed in the mold body;
A step of covering the obtained sintered metal layer and attaching a lid member to the mold body to prevent leakage of a cooling medium or a heating medium to be circulated through the sintered metal layer. Production method.
JP2000175738A 2000-06-12 2000-06-12 Manufacturing method of resin mold Expired - Fee Related JP4261030B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000175738A JP4261030B2 (en) 2000-06-12 2000-06-12 Manufacturing method of resin mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000175738A JP4261030B2 (en) 2000-06-12 2000-06-12 Manufacturing method of resin mold

Publications (2)

Publication Number Publication Date
JP2001353724A JP2001353724A (en) 2001-12-25
JP4261030B2 true JP4261030B2 (en) 2009-04-30

Family

ID=18677573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000175738A Expired - Fee Related JP4261030B2 (en) 2000-06-12 2000-06-12 Manufacturing method of resin mold

Country Status (1)

Country Link
JP (1) JP4261030B2 (en)

Also Published As

Publication number Publication date
JP2001353724A (en) 2001-12-25

Similar Documents

Publication Publication Date Title
EP1758720A4 (en) COOLING CIRCUIT FOR COOLING RINGS OF COLS D&#39;EBAUCHES
JP2000202871A (en) Gate and cavity insertion part of three portions of injection molding
JP4014232B2 (en) Electromagnetic induction heating mold for resin molding
JP2017022374A (en) Cold plate and manufacturing method thereof
JP4261030B2 (en) Manufacturing method of resin mold
JP4261029B2 (en) Resin mold
JP4244099B2 (en) Resin mold
JP5294618B2 (en) Injection mold
JP3895983B2 (en) Synthetic resin molding die, manufacturing method thereof, and synthetic resin molding method
JP6978647B2 (en) Injection molding method on semi-finished products
JP4266272B2 (en) Resin mold
JP4508825B2 (en) Insert molding die, method of manufacturing insert molded product, and insert molded product
JPH0111449Y2 (en)
JP2002172625A (en) Resin molding die and resin molding method using the same
CN115179514B (en) Injection molding&#39;s wheel hub and forming die thereof
JP4163333B2 (en) Mold for plastic
JP4244100B2 (en) Resin mold
JP3952622B2 (en) Common mold
JP7666529B2 (en) Manufacturing method of composite molding
JP4261027B2 (en) Resin mold
JP2013123900A (en) Injection molding mold
JP2003011197A (en) Molding equipment for molding
JP2002210781A (en) Mold for molding synthetic resin
CN109175312A (en) A kind of composite material heat-radiating substrate vacuum pressure infiltration molding die and forming method
JP7459708B2 (en) Nesting

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061130

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090128

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: 20090203

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090205

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

Free format text: PAYMENT UNTIL: 20120220

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

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

Free format text: PAYMENT UNTIL: 20130220

Year of fee payment: 4

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

Free format text: PAYMENT UNTIL: 20130220

Year of fee payment: 4

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

Free format text: PAYMENT UNTIL: 20140220

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees