JP4244099B2

JP4244099B2 - Resin mold

Info

Publication number: JP4244099B2
Application number: JP2000171321A
Authority: JP
Inventors: 文人上羽; 実基彦木村; 正照辻
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2000-06-07
Filing date: 2000-06-07
Publication date: 2009-03-25
Anticipated expiration: 2020-06-07
Also published as: JP2001347551A

Description

【０００１】
【発明の属する技術分野】
本発明は樹脂成形金型の改良に関する。
【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。
上記▲２▼の金型では、単に、多孔質材の部分域３に給水路４及び排水路５を接続しただけのものなので、給水路４近くの冷却効果が大きく、排水路５近くでは冷却効果が小さいことになり、実質的に金型の加熱・冷却サイクルが長く、成形時間が長くなり、生産性の低下を招く虞れがある。
【０００４】
そこで、本発明の目的は、金型の強度を維持しつつ熱媒体の流路を形成すると共に、金型の加熱・冷却サイクルの短縮を図ることのできる樹脂成形金型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は、凹部の底がキャビティに近づくように凹部を金型本体に開け、この金型本体の凹部内に焼結金属層を形成し、凹部を蓋部材で塞ぎ、焼結金属層に冷却用媒体又は加熱用媒体としての熱媒体を流通させることで、金型本体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、凹部の底から蓋部材に至る第１の突部を金型本体に付設すると共に、蓋部材に外側へ延びる第２の突部を付設したことを特徴とする。
【０００６】
キャビティ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にかかる。このとき、第１の凸部並びに蓋部材が補強部材となって金型本体の変形、すなわち、キャビティの変形を防止する役割を果たす。
金型本体に第１の突部を付設し、この突部の先端を蓋部材で支持させる構造を採用したことでキャビティの形状を良好に保てる。
【０００７】
請求項２は、第１の突部の軸線上に第２の突部を配置したことを特徴とする。第１の突部は、補強部材であると共に熱伝導部材でもある。そこで、第１の突部と第２の突部を一直線上に並べれば、熱の流れが円滑となり、金型本体の放熱機能を格段に高めることができる。
【０００８】
【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。
【０００９】
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。
【００１０】
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の突部としての第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。
【００１１】
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の突部としての第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。
【００１２】
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。
【００１３】
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。
【００１４】
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。このとき、第１のリブ３８・・・並びに蓋部材３５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。
【００１５】
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。
【００１６】
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。
【００１７】
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。
【００１８】
（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。
【００１９】
図６（ａ），（ｂ）は本発明に係る樹脂成形金型の第２作用説明図であり、（ａ）は比較例を示し、（ｂ）は実施例を示す。
（ａ）において、樹脂成形金型としての可動側金型１００は、金型本体１０１に成形凸部１０２を形成し、金型本体１０１に凹部１０３を形成し、この凹部１０３内に焼結金属層１０４形成し、これらの焼結金属層１０４及び凹部１０３を一括して平板の蓋部材１０５で覆ったものである。ここで、成形凸部１０２に矢印▲１▼の如く成形圧が加わることを想定すると、成形凸部１０２の強度を高める補強リブ（不図示）等がないので、成形凸部１０２はショットを重ねていくと二点鎖線で示すように変形を招く虞れがある。
【００２０】
（ｂ）において、可動側金型３０は、凹部３３の底３３ｈがキャビティ５０（図３参照）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。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。
【００２１】
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。
【００２２】
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。
【００２３】
【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、凹部の底がキャビティに近づくように凹部を金型本体に開け、この金型本体の凹部内に焼結金属層を形成し、凹部を蓋部材で塞ぎ、焼結金属層に冷却用媒体又は加熱用媒体としての熱媒体を流通させるようにしたので、キャビティ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。すなわち、金型本体に第１の突部を付設し、この突部の先端を蓋部材で支持させる構造を採用したのでキャビティの形状を良好に保てる。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。
また、凹部の底から蓋部材に至る第１の突部を金型本体に付設すると共に、蓋部材に外側へ延びる第２の突部を付設したので、金型本体の放熱効果の向上を図ることができる。
【００２４】
請求項２は、第１の突部の軸線上に第２の突部を配置したので、金型本体の放熱効果のさらなる促進を図ることができる。すなわち、第１の突部と第２の突部を一直線上に並べたので、熱の流れが円滑となり、金型本体の放熱機能を格段に高めることができる。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。
【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
【符号の説明】
３０…樹脂成形金型（可動側金型）、３１…金型本体、３３…凹部、３３ｈ…底、３４…焼結金属層、３５…蓋部材、３８…第１の突部（第１のリブ）、３９…第２の突部、５０…キャビティ、Ｃ…軸線。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a resin molding die.
[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.
In the above mold (2), since the water supply channel 4 and the drainage channel 5 are simply connected to the partial region 3 of the porous material, the cooling effect near the water supply channel 4 is great. The effect will be small, the heating / cooling cycle of the mold will be long, the molding time will be longer, and the productivity may be reduced.
[0004]
Accordingly, an object of the present invention is to provide a resin molding die that can form a heat medium flow path while maintaining the strength of the die and can shorten the heating / cooling cycle of the die. .
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the first aspect of the present invention is to open a recess in the mold body so that the bottom of the recess approaches the cavity, form a sintered metal layer in the recess of the mold body, and A resin molding die capable of forcibly cooling or forcibly heating a mold body by closing and circulating a cooling medium or a heating medium as a heating medium through the sintered metal layer, and covering from the bottom of the recess A first protrusion reaching the member is attached to the mold body, and a second protrusion extending outward is attached to the lid member.
[0006]
When resin is injected or put into the cavity, resin molding pressure is applied to the mold body. At this time, the first convex portion and the lid member serve as a reinforcing member and serve to prevent deformation of the mold body, that is, deformation of the cavity.
By adopting a structure in which the first protrusion is attached to the mold body and the tip of the protrusion is supported by the lid member, the shape of the cavity can be kept good.
[0007]
According to a second aspect of the present invention, the second protrusion is disposed on the axis of the first protrusion. The first protrusion is not only a reinforcing member but also a heat conducting member. Therefore, if the first protrusion and the second protrusion are arranged in a straight line, the flow of heat becomes smooth, and the heat dissipation function of the mold body can be greatly enhanced.
[0008]
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.
[0009]
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.
[0010]
3 is a cross-sectional view taken along the line 3-3 in FIG.
The recess 33 is formed in the mold body 31 so that the bottom 33 h approaches the cavity 50, and includes first ribs 38 as first protrusions for increasing the strength of the cavity 50. Is.
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.
[0011]
The lid member 35 is a member composed of a base portion 35a that collectively covers the sintered metal layer 34 and the concave portion 33, and second ribs 39 as second protrusions formed on the base portion 35a. There is a member that increases the strength of the cavity 50 together with the first ribs 38... By applying the base portion 35 a to the tips of the first ribs 38.
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.
[0012]
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.
[0013]
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.
[0014]
In addition, when resin is injected or injected into the cavity 50, resin molding pressure is applied to the mold body 31. At this time, the first ribs 38 and the lid member 35 serve as reinforcing members to prevent the deformation of the mold body 31, that is, the deformation of the cavity 50. The first ribs 38... Are attached to the mold body 31, and the end of the first ribs 38. .
[0015]
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.
[0016]
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.
[0017]
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.
[0018]
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.
[0019]
6 (a) and 6 (b) are explanatory views of the second action of the resin mold according to the present invention, (a) shows a comparative example, and (b) shows an example.
In (a), a movable mold 100 as a resin molding mold is formed with a molding projection 102 on a mold body 101, a recess 103 on a mold body 101, and a sintered metal in the recess 103. The layer 104 is formed, and the sintered metal layer 104 and the recess 103 are collectively covered with a flat lid member 105. Here, assuming that molding pressure is applied to the molding convex portion 102 as indicated by the arrow (1), there is no reinforcing rib (not shown) or the like that increases the strength of the molding convex portion 102, so the molding convex portion 102 overlaps shots. As it goes on, there is a risk of deformation as shown by the two-dot chain line.
[0020]
In (b), 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 (see FIG. 3), and the mold 30 is baked into the recess 33 of the mold body 31. The bonded metal layer 34 is formed, the recess 33 is closed with the lid member 35, and a cooling medium or a heating medium (not shown) as a heating medium is circulated through the sintered metal layer 34. The passage of the heat medium can be formed while maintaining the above. As a result, a resin mold having improved durability can be obtained. 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.
[0021]
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.
[0022]
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.
[0023]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
According to the first aspect of the present invention, the recess is opened in the mold body so that the bottom of the recess approaches the cavity, a sintered metal layer is formed in the recess of the mold body, the recess is closed with a lid member, and the sintered metal layer is formed. Since the heat medium as the cooling medium or the heating medium is circulated, the passage of the heat medium can be formed while maintaining the strength of the cavity. That is, since the first protrusion is attached to the mold body and the tip of the protrusion is supported by the lid member, the shape of the cavity can be kept good. As a result, a resin mold having improved durability can be obtained.
In addition, since the first protrusion extending from the bottom of the recess to the lid member is attached to the mold body, and the second protrusion extending outward is attached to the lid member, the heat dissipation effect of the mold body is improved. be able to.
[0024]
According to the second aspect of the present invention, since the second protrusion is disposed on the axis of the first protrusion, the heat dissipation effect of the mold body can be further promoted. That is, since the first protrusions and the second protrusions are arranged in a straight line, the heat flow becomes smooth, and the heat dissipation function of the mold body can be greatly enhanced. As a result, the heating / cooling cycle of the mold can be shortened, and the molding cost can be reduced.
[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. 4 Cross-sectional view [FIG. 5] First action explanatory diagram of the resin molding die according to the present invention [FIG. 6] Second action explanatory diagram of the resin molding die according to the present invention [Explanation of symbols]
DESCRIPTION OF SYMBOLS 30 ... Resin molding die (movable side die), 31 ... Mold main body, 33 ... Recess, 33h ... Bottom, 34 ... Sintered metal layer, 35 ... Lid member, 38 ... 1st protrusion (1st Rib), 39 ... second protrusion, 50 ... cavity, C ... axis.

Claims

A recess is opened in the mold body so that the bottom of the recess approaches the cavity, a sintered metal layer is formed in the recess of the mold body, the recess is closed with a lid member, and a cooling medium is formed on the sintered metal layer. Alternatively, a resin molding die capable of forcibly cooling or forcibly heating the die body by circulating a heating medium as a heating medium,
A resin molding die, wherein a first projection extending from the bottom of the recess to the lid member is attached to the mold body, and a second projection extending outward is attached to the lid member.

The resin molding die according to claim 1, wherein the second protrusion is disposed on an axis of the first protrusion.