JP2003117952A - Injection mold - Google Patents
Injection moldInfo
- Publication number
- JP2003117952A JP2003117952A JP2001317072A JP2001317072A JP2003117952A JP 2003117952 A JP2003117952 A JP 2003117952A JP 2001317072 A JP2001317072 A JP 2001317072A JP 2001317072 A JP2001317072 A JP 2001317072A JP 2003117952 A JP2003117952 A JP 2003117952A
- Authority
- JP
- Japan
- Prior art keywords
- core
- mold
- forming
- recess
- undercut
- 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.)
- Pending
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂の射出成形な
どに用いられる射出成形用金型であって、特に、固定側
型と可動側型とを互いに開閉可能とし、型閉時において
型相互間に、型開閉方向に対して斜めに進退動作される
傾斜コアを用いて成形されるアンダーカット部と、傾斜
コアの進退動作の軌跡によって形成される傾斜コアのス
ライド領域内に型開閉方向におけるアンダーカット部か
ら遠ざかる方向に向かって凹む凹部とを有するキャビテ
ィが形成される射出成形用金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding die used for resin injection molding and the like. In particular, a fixed side mold and a movable side mold can be opened and closed with each other, and when the mold is closed, the molds are mutually connected. In between, an undercut portion formed by using an inclined core that is moved forward and backward with respect to the mold opening and closing direction, and a slide region of the inclined core that is formed by the trajectory of the forward and backward movement of the inclined core in the mold opening and closing direction. The present invention relates to an injection molding die in which a cavity having a recessed portion that is recessed in a direction away from an undercut portion is formed.
【０００２】[0002]
【従来の技術】従来、樹脂製品において射出成形におい
てアンダーカット処理が必要な部分を成形する場合があ
り、アンダーカット部の成形は、傾斜コアを用いたり、
スライドコアを用いて行っていた。2. Description of the Related Art Conventionally, in a resin product, there is a case where a portion requiring an undercut treatment is formed in injection molding, and the undercut portion is molded by using a tilted core,
This was done using a slide core.
【０００３】さらに、樹脂製品においては、アンダーカ
ット部の他に、傾斜コアまたはスライドコアの進退動作
の軌跡によって形成されるコアのスライド領域内に型開
閉方向におけるアンダーカット部から遠ざかる方向に向
かって凹む凹部を有する形状のものも成形する場合があ
る。Further, in the resin product, in addition to the undercut portion, in the sliding area of the core formed by the trajectory of the forward / backward movement of the inclined core or the slide core, the resin product is moved away from the undercut portion in the mold opening / closing direction. A shape having a recessed portion may be formed.
【０００４】このようなアンダーカット部と凹部を有す
る樹脂製品として例えば、図１および図２に示すような
板状部Ｂの中央部に上方に向けて突出させながら底面側
を凹ました凹部Ｃと、凹部Ｃの近くに下方に向かって屈
曲して延びる鈎状の突起部Ｄとを設けた樹脂製品Ａがあ
り、この樹脂製品Ａは、射出成形により成形するときに
は、突起部Ｄの屈曲させた部分が型開閉方向に対してア
ンダーカット部Ｅとなり、突起部Ｄと凹部Ｃを形成する
ためのコアが必要となる。As a resin product having such an undercut portion and a concave portion, for example, a concave portion C in which the bottom side is depressed while projecting upward to the central portion of the plate-shaped portion B as shown in FIGS. There is a resin product A provided with a hook-shaped protrusion D that is bent and extends downward near the recess C. When the resin product A is molded by injection molding, the protrusion D is bent. The portion becomes an undercut portion E in the mold opening / closing direction, and a core for forming the protrusion D and the recess C is required.
【０００５】[0005]
【発明が解決しようとする課題】ところで、図１および
図２に示すようなアンダーカット部Ｅを成形するコアの
スライド領域内に凹部Ｃが形成される樹脂製品Ａの場合
は、図２の二点破線で示すような一体型のコアにするこ
とが考えられる。By the way, in the case of the resin product A in which the recess C is formed in the slide region of the core for molding the undercut portion E as shown in FIGS. It is conceivable to use an integral type core as shown by a broken line.
【０００６】しかしながら、コアを一体型にする場合
は、突起部Ｄのアンダーカット部Ｅを考慮してコアを斜
め上方に移動させながらコアを突起部Ｄから金型分割面
と平行する方向に抜き取ろうとすると、コアにおける凹
部Ｃに対応した部分がコアの抜き取り方向に対してアン
ダーカットになってしまい、また、コアを型開閉方向と
同方向に抜き取ろうとすると突起部Ｄがアンダーカット
部Ｅとなってしまって、樹脂製品Ａからコアを抜き取る
ことができず、無理に抜こうとすると製品が損傷したり
変形したりする虞がある。However, when the core is integrated, the core is removed from the protrusion D in a direction parallel to the mold dividing surface while moving the core obliquely upward in consideration of the undercut portion E of the protrusion D. When attempting to remove the core, the portion corresponding to the recess C in the core is undercut in the core withdrawing direction, and when the core is withdrawn in the same direction as the mold opening and closing direction, the protrusion D is undercut. Therefore, the core cannot be removed from the resin product A, and if the core is forcibly removed, the product may be damaged or deformed.
【０００７】そのため、従来では、凹部Ｃおよびアンダ
ーカット部Ｅの形状となるように、コアの移動方向が異
なる多数の傾斜コアやスライドコアを組み合わせて、抜
きが可能な順番にコアを動作させていくことによりコア
を完全に抜くようにしている。Therefore, conventionally, a large number of inclined cores or slide cores having different moving directions of the cores are combined so as to form the concave portions C and the undercut portions E, and the cores are operated in a pullable order. I try to pull out the core completely by going.
【０００８】しかし、多数のコアを用いて樹脂製品Ａを
形成する場合には、構造が複雑になり、部品点数も増加
するばかりか、コアの抜き動作が可能なものから順番に
動作させていく必要があり、製造時間が長くなるという
不具合がある。また、スライドコアを用いる場合、スラ
イドコアのスライド長さが長くなるとスライドピン等の
部品が破損しやすくなるなどの不具合が生ずる。However, when the resin product A is formed by using a large number of cores, not only the structure becomes complicated and the number of parts increases, but the cores can be removed in order from the one that can be removed. Therefore, there is a problem that the manufacturing time becomes long. In addition, when a slide core is used, if the slide length of the slide core becomes long, problems such as easy damage of parts such as slide pins occur.
【０００９】また、このように多数のコアを用いない場
合には、突起部Ｄを形成するためのコアのスライド領域
内に凹部Ｃが形成されないように、凹部Ｃと突起部Ｄと
が形成される製品形状に変更するしかなかった。When a large number of cores are not used, the recess C and the protrusion D are formed so that the recess C is not formed in the sliding area of the core for forming the protrusion D. I had no choice but to change to a different product shape.
【００１０】しかし、凹部Ｃが突起部Ｄを形成するため
のコアのスライド領域内に形成されないようにする場合
は、凹部Ｃは固定側型または可動側型のみで成形できる
し、突起部Ｄは突起部形成用のコアのみで形成できるの
で多数のコアを用いる場合に比べて製造時間を短くでき
るが、凹部Ｃの形成位置と突起部Ｄの形成位置とを重ね
ることができず、製品形状の自由度が非常に小さくな
る。However, when the recess C is not formed in the sliding area of the core for forming the protrusion D, the recess C can be formed only by the fixed side mold or the movable side mold, and the protrusion D is formed. Since it can be formed only by the core for forming the protrusion, the manufacturing time can be shortened as compared with the case of using a large number of cores, but the formation position of the recess C and the formation position of the protrusion D cannot be overlapped, and the product shape The degree of freedom is very small.
【００１１】また、樹脂製品の形状を変更する場合に
は、金型のデータを変更し、その変更後のデータを検討
する必要があることから、金型を製造する際の納期が遅
れてしまうなどの不具合も生ずる。Further, when the shape of the resin product is changed, it is necessary to change the data of the mold and examine the data after the change, which delays the delivery time when manufacturing the mold. Such problems also occur.
【００１２】本発明は、このような問題点を解決しよう
とするもので、アンダーカット部を成形するコアのスラ
イド領域内に凹部が形成される場合でも、製造時間の無
駄無く、樹脂製品の損傷または変形を与えることなく樹
脂製品を提供することができる射出成形用金型を提供す
ることを目的とする。The present invention is intended to solve such a problem, and even when a recess is formed in the sliding region of the core for molding the undercut portion, the manufacturing time is not wasted and the resin product is damaged. Another object of the present invention is to provide a mold for injection molding which can provide a resin product without deformation.
【００１３】[0013]
【課題を解決するための手段】前記目的を達成するため
に、本発明の請求項１に記載の射出成形用金型は、固定
側型と可動側型とを互いに開閉可能とし、型閉時におい
て型相互間に、型開閉方向に対して斜めに進退動作され
る傾斜コアを用いて成形されるアンダーカット部と、傾
斜コアの進退動作の軌跡によって形成される傾斜コアの
スライド領域内に型開閉方向でアンダーカット部から遠
ざかる方向に向かって凹む凹部とを有するキャビティが
形成される射出成形用金型において、傾斜コアが配設さ
れる固定側型または可動側型に、型開閉方向に進退動作
される凹部を形成するための凹部形成用コアを設け、傾
斜コアと凹部形成用コアは、傾斜コアの一部が凹部形成
用コアの底面に接触した状態で重ね合わされ、凹部形成
用コアの型開閉方向への進出移動に連動して、傾斜コア
がアンダーカット部から離れる方向に進出動作するよう
になされている構成とした。In order to achieve the above object, an injection molding die according to claim 1 of the present invention is configured such that a fixed side mold and a movable side mold can be opened and closed with each other, and when the mold is closed. In the slide region of the inclined core formed by the trajectory of the forward / backward movement of the inclined core, and the undercut portion formed by using the inclined core that is moved forward / backward with respect to the opening / closing direction of the inclined core. In an injection-molding die in which a cavity having a concave portion that is recessed in a direction away from the undercut portion in the opening / closing direction is formed, a fixed-side mold or a movable-side mold in which a tilted core is disposed advances or retreats in the mold opening / closing direction. The recess forming core for forming the recess to be operated is provided, and the inclined core and the recess forming core are overlapped with each other such that a part of the inclined core is in contact with the bottom surface of the recess forming core. How to open and close the mold In conjunction with the advancing movement of the inclined core has a configuration that is adapted to operate advancing in a direction away from the undercut portion.
【００１４】また、請求項２に記載の発明は、請求項１
に記載の射出成形用金型において、凹部成形用コアの底
面における傾斜コアのスライド領域外に、凹部形成用コ
アを型開閉方向に進退動作させる凹部形成用コアピンを
設けている構成とした。The invention described in claim 2 is the same as claim 1
In the injection molding die described in (1), the recess forming core pin for moving the recess forming core forward and backward in the mold opening and closing direction is provided outside the slant core slide region on the bottom surface of the recess forming core.
【００１５】[0015]
【発明の実施形態】本発明の射出成形用金型は、射出成
形において型開閉方向に対するアンダーカット部と、ア
ンダーカット部を形成するためのコアの進退動作の軌跡
によって形成されるコアのスライド領域内に型開閉方向
でアンダーカット部から遠ざかる方向に向かって凹む凹
部を有する樹脂製品を提供するものである。BEST MODE FOR CARRYING OUT THE INVENTION The injection molding die of the present invention has a core slide region formed by an undercut portion in the mold opening / closing direction in injection molding and a trajectory of a forward / backward movement of the core for forming the undercut portion. (EN) Provided is a resin product having a recessed portion which is recessed in the mold opening / closing direction in a direction away from the undercut portion.
【００１６】以下、本発明の射出成形用金型の実施形態
について、図面を参照しながら説明する。Embodiments of the injection molding die of the present invention will be described below with reference to the drawings.
【００１７】本実施形態の射出成形用金型は、図１およ
び図２に示すような、板状部Ｂの中央部に上方に向けて
突出し底面側が横長に凹まされた凹部Ｃと、板状部Ｂの
底面で凹部Ｃの近くに下方に向かって延びるアンダーカ
ット部Ｅとなる屈曲部を有した鈎状の突起部Ｄとを設け
た樹脂製品Ａを形成するためのものである。As shown in FIGS. 1 and 2, the injection-molding die of this embodiment has a plate-shaped portion B, a concave portion C which projects upward toward the central portion of the plate-shaped portion B, and has a horizontally elongated bottom surface side, and a plate-shaped portion. This is for forming a resin product A provided with a hook-shaped protrusion D having a bent portion which becomes an undercut portion E extending downward near the recess C on the bottom surface of the portion B.
【００１８】図３は射出成形用金型の部分断面図、図４
は図３におけるＸ−Ｘ線断面図であって、固定側型１と
可動側型２を備えており、図３および図４において可動
側型２を固定側型１に対して上下方向（以下、型開閉方
向という）に移動させることにより固定側型１と可動側
型２を開閉するようになっている。FIG. 3 is a partial sectional view of an injection molding die, FIG.
3 is a cross-sectional view taken along line XX in FIG. 3, which includes a fixed side mold 1 and a movable side mold 2. In FIGS. , The fixed side die 1 and the movable side die 2 are opened and closed.
【００１９】可動側型２には、樹脂製品Ａのアンダーカ
ット部Ｅとなる突起部Ｄを形成するための突起部形成用
傾斜コア３と凹部Ｃを形成するための凹部形成用コア４
とを進退可能に設けており、型閉時において固定側型１
と可動側型２と突起部形成用傾斜コア３と凹部形成用コ
ア４とにより製品形状のキャビティ５を形成するように
なっている。In the movable mold 2, a protrusion forming inclined core 3 for forming a protrusion D to be an undercut E of the resin product A and a recess forming core 4 for forming a recess C are formed.
And are provided so that they can move forward and backward, and the fixed side mold 1 when the mold is closed.
The movable side mold 2, the projection forming inclined core 3 and the recess forming core 4 form a product-shaped cavity 5.
【００２０】突起部形成用傾斜コア３は、図３および図
４に示すように、突起部Ｄを形成する側とは反対側の面
を傾斜面３１とするとともに、底面に、傾斜コアピン３
２を連続形成している。この傾斜コアピン３２は、図３
に示すように、型開閉方向に対して斜めで、突起部形成
用傾斜コア３の傾斜面３１と平行するように設けられて
おり、可動側型２に斜めに設けられた傾斜コア用ピン孔
２２に進退可能に挿通されている。As shown in FIGS. 3 and 4, the inclined core 3 for forming a protrusion has an inclined surface 31 on the side opposite to the side on which the protrusion D is formed, and has an inclined core pin 3 on the bottom surface.
2 are continuously formed. This inclined core pin 32 is shown in FIG.
As shown in FIG. 5, the inclined core pin hole is provided obliquely to the mold opening / closing direction and parallel to the inclined surface 31 of the protrusion forming inclined core 3, and is obliquely provided on the movable mold 2. 22 is inserted so as to be able to move forward and backward.
【００２１】さらに、可動側型２には、突起部形成用傾
斜コア３が収納されるコア収納部２３が形成され、この
コア収納部２３には、傾斜コアピン３２および突起部形
成用傾斜コア３の傾斜面３１の傾斜角度と同じ角度を有
し、突起部形成用傾斜コア３の傾斜面３１に沿う傾斜ガ
イド面２４を形成しており、この傾斜ガイド面２４によ
り突起部形成用傾斜コア３の進退動作を円滑に行えるよ
うにしている。Further, the movable side mold 2 is formed with a core accommodating portion 23 for accommodating the protrusion forming inclined core 3, and in the core accommodating portion 23, the inclined core pin 32 and the protrusion forming inclined core 3 are formed. The inclined guide surface 24 is formed along the inclined surface 31 of the protrusion forming inclined core 3 having the same inclination angle as that of the inclined surface 31 of FIG. It is possible to smoothly move forward and backward.
【００２２】凹部形成用コア４は、突起部形成用傾斜コ
ア３の進退動作の軌跡によって形成されるスライド領域
内に位置されており、凹部形成用コア４は図４に示すよ
うに横長な直方体で、凹部成形用コア３の底面の面積
は、図４に示すように、その一部である長手方向両端側
が突起部形成用傾斜コア３のスライド領域からはみ出す
大きさとなっている。The recess forming core 4 is located in a slide region formed by the trajectory of the forward / backward movement of the protrusion forming inclined core 3, and the recess forming core 4 is a horizontally long rectangular parallelepiped as shown in FIG. Then, as shown in FIG. 4, the area of the bottom surface of the recess forming core 3 is such that both ends in the longitudinal direction, which are part of the recess forming core 3, protrude from the slide region of the protrusion forming inclined core 3.
【００２３】さらに、凹部形成用コア４の底面でスライ
ド領域外に位置する長手方向両端部に、それぞれ凹部コ
アピン４１を連続形成している。２本の凹部コアピン４
１は、それぞれ可動側型２に設ける凹部コア用ピン孔２
５に挿通されており、型開閉方向と同じ方向に進退動作
するようになっている。Further, recessed core pins 41 are continuously formed on both end portions in the longitudinal direction of the recessed portion forming core 4 which are located outside the slide region. Two recessed core pins 4
1 is a pin hole 2 for concave core provided in the movable mold 2
It is inserted into the mold 5, and is adapted to move back and forth in the same direction as the mold opening and closing direction.
【００２４】そして、突起部形成用傾斜コア３は、図３
および図４において凹部形成用コア４の下方位置で、か
つ、凹部形成用コア４の２本の凹部コアピン４１の間に
位置され、凹部形成用コア４の底面に突起部形成用傾斜
コア３の上面の一部が接触するように凹部形成用コア４
と突起部形成用傾斜コア３は重ね合わされた状態で配設
されている。Then, the inclined core 3 for forming the protrusion is shown in FIG.
4 is located below the recess forming core 4 and between the two recess core pins 41 of the recess forming core 4, and the protrusion forming inclined core 3 is provided on the bottom surface of the recess forming core 4. Recess forming core 4 so that a part of the upper surface is in contact
The inclined core 3 for forming a protrusion is arranged in a superposed state.
【００２５】凹部コアピン４１に支持された凹部形成用
コア４は、型閉時において可動側型２の金型分割面２１
に連続した状態で金型分割面２１から突出するように配
置され、傾斜コアピン３２に支持された突起部形成用傾
斜コア３は、型閉時において可動側型２の金型分割面２
１から突出しないようにコア収納部２３内に配置され
る。The recess forming core 4 supported by the recess core pin 41 has the mold dividing surface 21 of the movable side mold 2 when the mold is closed.
The projecting portion forming tilted core 3 which is arranged so as to project from the mold dividing surface 21 in a continuous state with the mold and which is supported by the tilting core pin 32 is used for the mold dividing surface 2 of the movable side mold 2 when the mold is closed.
It is arranged in the core housing portion 23 so as not to project from 1.
【００２６】本実施形態では、突起部形成用傾斜コア３
及び傾斜コアピン３２の進退動作範囲（スライド領域）
を除くように、傾斜コアピン３２を挟むようにして凹部
形成用コア４の底面に２本の凹部コアピン４１を設けて
いるので、突起部形成用傾斜コア３は、２本の凹部コア
ピン４１の間で傾斜コアピン３２による進退動作が行え
る。In this embodiment, the inclined core 3 for forming the protrusions is formed.
And forward / backward movement range (sliding area) of the inclined core pin 32
Since two concave core pins 41 are provided on the bottom surface of the concave forming core 4 so as to sandwich the inclined core pins 32, the protruding portion forming inclined core 3 is inclined between the two concave core pins 41. A forward / backward movement can be performed by the core pin 32.
【００２７】そして、凹部形成用コア４と突起部形成用
傾斜コア３は同時に進退移動を行うようになっている。
具体的には、凹部コアピン４１と傾斜コアピン３２の根
元部は、図示していないが、可動側型２内に形成された
空間部に上下動可能に設けるエジェクタプレートに支持
され、エジェクタプレートの上下動作に連動して、凹部
コアピン４１が型開閉方向と同方向に、また、傾斜コア
ピン３２が型開閉方向に対して斜め方向に同時に進退動
作するようになっている。The concave portion forming core 4 and the protruding portion forming inclined core 3 move forward and backward at the same time.
Specifically, the root portions of the recessed core pin 41 and the inclined core pin 32 are supported by an ejector plate provided so as to be movable up and down in a space formed in the movable side mold 2 (not shown), and the upper and lower portions of the ejector plate are supported. In conjunction with the operation, the recessed core pins 41 move forward and backward simultaneously in the same direction as the mold opening and closing direction, and the inclined core pins 32 move forward and backward at the same time in an oblique direction with respect to the mold opening and closing direction.
【００２８】本実施形態では、エジェクタプレートを上
下動させると、突起部形成用傾斜コア３は、凹部形成用
コア４の底面に接触したまま型開閉方向と直交する方向
にスライドすることになる。In this embodiment, when the ejector plate is moved up and down, the protrusion forming inclined core 3 slides in the direction orthogonal to the mold opening / closing direction while being in contact with the bottom surface of the recess forming core 4.
【００２９】つぎに、本実施形態の構成についてその作
用を説明する。樹脂成形にあたっては、図３に示すよう
に、固定側型１と可動側型２とを閉じた状態にして、図
示しない射出成形機のノズルから成形材料通路内へ溶融
した樹脂を射出しキャビティ５内に流入させる。Next, the operation of the configuration of this embodiment will be described. In resin molding, as shown in FIG. 3, the fixed mold 1 and the movable mold 2 are closed, and the molten resin is injected into the molding material passage from the nozzle of the injection molding machine (not shown) to form the cavity 5. Let it flow in.
【００３０】このとき、突起部形成用傾斜コア３と凹部
形成用コア４とを図３に示す下方位置に後退させてお
く。At this time, the protrusion forming inclined core 3 and the recess forming core 4 are retracted to the lower position shown in FIG.
【００３１】そして、図３および図４に示すようにキャ
ビティ５内に樹脂が充填されて冷却固化されると、可動
側型２が型開方向に動作して型が開かれ、図５示すよう
に、突起部形成用傾斜コア３と凹部形成用コア４が上動
する。When the cavity 5 is filled with resin and cooled and solidified as shown in FIGS. 3 and 4, the movable side mold 2 operates in the mold opening direction to open the mold, and as shown in FIG. Then, the protrusion forming inclined core 3 and the recess forming core 4 move upward.
【００３２】このとき、凹部形成用コア４は樹脂製品Ａ
の凹部Ｃに嵌ったまま、可動側型２の金型分割面２１に
対して上昇し、樹脂製品Ａが凹部形成用コア４により可
動側型２から離れる方向に押し上げられる。At this time, the recess forming core 4 is made of the resin product A.
While being fitted in the recess C, the resin product A is lifted up relative to the mold dividing surface 21 of the movable mold 2, and the resin product A is pushed up by the recess forming core 4 in a direction away from the movable mold 2.
【００３３】また、突起部形成用傾斜コア３は、可動側
型２に形成した傾斜面３１に沿って斜めに上昇していく
とともに、突起部形成用傾斜コア３の上面が凹部形成用
コア４の底面に接触しながら型開閉方向と直交する方向
にスライドしていき、樹脂製品Ａの突起部Ｄから突起部
形成用傾斜コア３が離れる。Further, the protrusion forming inclined core 3 rises obliquely along the inclined surface 31 formed on the movable mold 2, and the upper surface of the protrusion forming inclined core 3 is provided with the recess forming core 4. While sliding on the bottom surface of the resin product, it slides in a direction orthogonal to the mold opening / closing direction, and the protrusion forming inclined core 3 separates from the protrusion D of the resin product A.
【００３４】そして、樹脂製品Ａの突起部Ｄから突起部
形成用傾斜コア３が完全に離れた後に、樹脂製品Ａを凹
部形成用コア４から抜き取る。After the protrusion-forming inclined core 3 is completely separated from the protrusion D of the resin product A, the resin product A is extracted from the recess-forming core 4.
【００３５】以上のように、本実施形態によれば、突起
部形成用傾斜コア３が配設される可動側型２に、型開閉
方向に進退動作される凹部Ｃを形成するための凹部形成
用コア４を設け、突起部形成用傾斜コア３と凹部形成用
コア４を、突起部形成用傾斜コア３の一部が凹部形成用
コア４の底面に接触した状態で重ね合わせ、凹部形成用
コア４の型開閉方向への進出移動に連動して、突起部形
成用傾斜コア３をアンダーカット部Ｅとなる突起部Ｄか
ら離れる方向に進出動作させる構成としたので凹部形成
用コア４と突起部形成用傾斜コア３とを同時にそれぞれ
個別に動作させて、突起部形成用傾斜コア３を突起部Ｄ
に損傷を与えることなく突起部Ｄから確実に抜き取るこ
とができ、かつ、樹脂製品Ａの凹部Ｃにも損傷を与える
ことなく凹部Ｃから凹部形成用コア４を確実に抜き取る
ことができる。As described above, according to this embodiment, the concave portion C for forming the concave portion C that is moved forward and backward in the mold opening and closing direction is formed in the movable mold 2 on which the protrusion forming inclined core 3 is arranged. Core 4 is provided, and the inclined core 3 for forming a protrusion and the core 4 for forming a recess are overlapped with each other so that a part of the inclined core 3 for forming a protrusion is in contact with the bottom surface of the core 4 for forming a recess. Since the inclined core 3 for forming a protrusion is moved in a direction away from the protrusion D serving as the undercut portion E in association with the advancement movement of the core 4 in the mold opening / closing direction, the recess forming core 4 and the protrusion The inclined core 3 for forming a part is simultaneously and individually operated to move the inclined core 3 for forming a protruding part to the protruding part D.
It is possible to surely pull out from the projection D without damaging the concave portion, and it is possible to surely pull out the concave portion forming core 4 from the concave portion C without damaging the concave portion C of the resin product A.
【００３６】したがって、突起部形成用傾斜コア３の進
退動作の軌跡によって形成されるスライド領域内に型開
閉方向でアンダーカット部Ｅから遠ざかる方向に向かっ
て凹む凹部Ｃが形成される樹脂製品Ａを成形する場合で
も、従来の多数のコアを設ける場合のように、成形工程
にかかる時間が長くなることなく、複雑なコア動作機構
とすることもなく、部品点数少なく、凹部Ｃとアンダー
カット部Ｅとを有する樹脂製品Ａを損傷または変形を与
えることなく確実に形成することができる。Therefore, the resin product A in which the concave portion C which is recessed in the mold opening / closing direction in the direction away from the undercut portion E is formed in the slide region formed by the trajectory of the forward / backward movement of the protrusion forming inclined core 3. Even in the case of molding, unlike the conventional case where a large number of cores are provided, the time required for the molding process does not become long, a complicated core operating mechanism is not used, the number of parts is small, and the concave portion C and the undercut portion E are small. The resin product A having a can be reliably formed without damaging or deforming.
【００３７】その結果、簡単な金型の構成で、成形時間
を短くして、従来よりも樹脂製品の形状の自由度を広げ
ることができるようになる。As a result, the molding time can be shortened and the degree of freedom of the shape of the resin product can be increased with a simple structure of the mold.
【００３８】また、前記実施形態では、突起部形成用傾
斜コア３と凹部形成用コア４とを可動側型２に設けた
が、必要に応じて固定側型に設けてもよい。さらに、本
発明は、熱可塑性樹脂の射出成形用金型に限らず、他の
成形材料、成形方法用の金型装置にも適用できる。In the above embodiment, the protrusion forming inclined core 3 and the recess forming core 4 are provided in the movable mold 2, but they may be provided in the fixed mold as required. Furthermore, the present invention can be applied not only to a mold for injection molding of a thermoplastic resin but also to a mold device for other molding materials and molding methods.
【００３９】また、本発明は、凹部の底面の面積の範囲
内に、傾斜コアの進退動作の軌跡によって形成されるス
ライド領域が複数ある場合、即ち、一つの凹部に対して
複数のアンダーカット部が形成される場合や、複数の凹
部と複数のアンダーカット部がある場合にも適用でき
る。Further, according to the present invention, when there are a plurality of slide regions formed by the trajectory of the forward / backward movement of the inclined core within the range of the area of the bottom surface of the recess, that is, a plurality of undercut portions for one recess. It is also applicable to the case where there are formed, or the case where there are a plurality of concave portions and a plurality of undercut portions.
【００４０】さらに、前記した実施形態では、凹部Ｃは
四方が囲まれた凹み形状とし、板状部Ｂを平面状に形成
したが、たとえば、図６に示すように、水平面部Ｆと、
水平面部Ｆから立ち上がる垂直面部Ｇと、垂直面部Ｇに
連続する頂面部Ｈと、頂面部Ｈから下方に向けて延びる
傾斜面部Ｊとを備え、垂直面部Ｇと頂面部Ｈと傾斜面部
Ｊの上部により長手方向両端が外部に開放された凹部Ｃ
を形成し、水平面部Ｆの底面側にアンダーカット部Ｅと
なる孔Kが形成された突起部Ｄを有する樹脂製品Ａに対
しても本発明を適応できる。Further, in the above-described embodiment, the concave portion C has a concave shape surrounded by four sides and the plate portion B is formed in a flat shape. For example, as shown in FIG.
A vertical surface portion G rising from the horizontal surface portion F, a top surface portion H continuous with the vertical surface portion G, and an inclined surface portion J extending downward from the top surface portion H are provided, and the vertical surface portion G, the top surface portion H, and the upper portion of the inclined surface portion J. The recess C whose both ends in the longitudinal direction are opened to the outside by
The present invention can also be applied to a resin product A having a protrusion D formed with a hole K to be an undercut portion E on the bottom surface side of the horizontal surface portion F.
【００４１】図６に示す樹脂製品Ａを射出成形する場合
も、前記した図３から図５に示す突起部形成用傾斜コア
３と凹部形成用コア４とほぼ同じ機構で樹脂製品Ａを成
形することができる。Also when the resin product A shown in FIG. 6 is injection-molded, the resin product A is molded by substantially the same mechanism as that of the protrusion forming inclined core 3 and the recess forming core 4 shown in FIGS. be able to.
【００４２】即ち、図７に示すように、固定側型１と可
動側型２により、樹脂製品Ａの傾斜面部Ｊの下部を形成
するためキャビティ５を形成するとともに、孔Kを含ん
だ突起部Ｄを形成するための突起部形成用傾斜コア３
と、凹部Ｃを形成するための凹部形成用コア４とを可動
側型２に進退動作可能に配設する。That is, as shown in FIG. 7, the fixed side mold 1 and the movable side mold 2 form a cavity 5 for forming a lower portion of the inclined surface portion J of the resin product A, and a protrusion portion including a hole K. Inclined core 3 for forming protrusions for forming D
And the recess forming core 4 for forming the recess C are arranged in the movable mold 2 so as to be able to move forward and backward.
【００４３】そして、樹脂製品Ａを可動側型２から離す
場合ときには、可動側型２を固定側型１から開いた後、
凹部形成用コア４を型開閉方向と同方向に上動させなが
ら、突起部形成用傾斜コア３を型開閉方向に対して斜め
上方に向けて進出させることにより、突起部Ｄの孔Kか
ら傾斜コア４を樹脂製品Ａに損傷または変形を与えるこ
となく抜き出すことができる。When the resin product A is to be separated from the movable side mold 2, after the movable side mold 2 is opened from the fixed side mold 1,
Inclined from the hole K of the protrusion D by moving the recess forming core 4 upward in the same direction as the mold opening / closing direction and advancing the protrusion forming inclined core 3 obliquely upward with respect to the mold opening / closing direction. The core 4 can be extracted without damaging or deforming the resin product A.
【００４４】[0044]
【発明の効果】請求項１に記載の発明によれば、アンダ
ーカット部と、傾斜コアの進退動作の軌跡によって形成
される傾斜コアのスライド領域内に型開閉方向でアンダ
ーカット部から遠ざかる方向に向かって凹む凹部とを有
するキャビティが形成される射出成形用金型において、
傾斜コアが配設される固定側型または可動側型に、型開
閉方向に進退動作される凹部を形成するための凹部形成
用コアを設け、傾斜コアと凹部形成用コアは、傾斜コア
の一部が凹部形成用コアの底面に接触した状態で重ね合
わされ、凹部形成用コアの型開閉方向への進出移動に連
動して、傾斜コアがアンダーカット部から離れる方向に
進出動作するようになされている構成としたから、傾斜
コアと凹部形成用コアを連動してそれぞれ個別に動作さ
せて、傾斜コアを樹脂製品のアンダーカット部に損傷を
与えることなくアンダーカット部から確実に抜き取るこ
とができ、かつ、樹脂製品の凹部にも損傷を与えること
なく凹部から凹部形成用コアを確実に抜き取ることがで
きる。According to the invention as set forth in claim 1, in the slide region of the inclined core formed by the movement of the undercut portion and the inclined core, the mold opening / closing direction is moved away from the undercut portion. In a mold for injection molding in which a cavity having a concave portion that is recessed toward is formed,
A fixed side mold or a movable side mold on which the inclined core is arranged is provided with a concave portion forming core for forming a concave portion that is moved forward and backward in the mold opening and closing direction. The portions are overlapped with each other in contact with the bottom surface of the recess forming core, and the inclined core moves in the direction away from the undercut portion in association with the advance movement of the recess forming core in the mold opening / closing direction. Since the inclined core and the recess forming core are interlocked and operated individually, the inclined core can be reliably removed from the undercut portion of the resin product without damaging the undercut portion, Moreover, the recess forming core can be reliably pulled out from the recess without damaging the recess of the resin product.
【００４５】したがって、傾斜コアの進退動作の軌跡に
よって形成されるスライド領域内に型開閉方向でアンダ
ーカット部から遠ざかる方向に向かって凹む凹部が形成
される樹脂製品を成形する場合でも、成形工程にかかる
時間が長くなることなく、複雑なコア動作機構とするこ
ともなく、部品点数少なく、凹部とアンダーカット部と
を有する樹脂製品を損傷または変形を与えることなく確
実に形成することができる。Therefore, even when molding a resin product in which a recessed portion is formed in the slide area formed by the trajectory of the forward / backward movement of the inclined core, the recessed portion being away from the undercut portion in the mold opening / closing direction. It is possible to reliably form a resin product having a recess and an undercut portion without damaging or deforming, without increasing the time, without using a complicated core operating mechanism, with a small number of parts.
【００４６】その結果、簡単な金型の構成で、成形時間
を短くして、従来よりも樹脂製品の形状の自由度を広げ
ることができるようになる。As a result, the molding time can be shortened and the degree of freedom in the shape of the resin product can be increased with a simple structure of the mold.
【００４７】また、請求項２に記載の発明は、請求項１
に記載の射出成形用金型において、凹部成形用コアの底
面における傾斜コアのスライド領域外に、凹部形成用コ
アを型開閉方向に進退動作させる凹部形成用コアピンを
設けている構成としたので、傾斜コアの進退動作に支障
を与えることなく凹部形成用コアも確実に進退動作させ
ることができる。The invention described in claim 2 is the same as claim 1.
In the injection-molding die according to the above, since the recess forming core pin for moving the recess forming core forward and backward in the mold opening and closing direction is provided outside the sliding region of the inclined core on the bottom surface of the recess forming core, The recess forming core can be reliably moved forward and backward without hindering the forward and backward movements of the inclined core.
【図１】本発明の射出成形用金型で成形された樹脂製品
の斜視図である。FIG. 1 is a perspective view of a resin product molded by an injection molding die of the present invention.
【図２】図１に示す樹脂製品の断面図である。FIG. 2 is a cross-sectional view of the resin product shown in FIG.
【図３】本発明の実施形態の射出成形用金型の部分断面
図であって、型閉状態を示す。FIG. 3 is a partial cross-sectional view of the injection-molding die according to the embodiment of the present invention, showing a mold closed state.
【図４】図３におけるＸ−Ｘ線断面図である。4 is a sectional view taken along line XX in FIG.
【図５】図３の型閉状態から型を開いた型開状態を示す
断面図である。5 is a cross-sectional view showing a mold open state in which the mold is opened from the mold closed state of FIG.
【図６】本発明の射出成形用金型で成形された他の実施
形態における樹脂製品の斜視図である。FIG. 6 is a perspective view of a resin product in another embodiment, which is molded by the injection molding die of the present invention.
【図７】図６に示す実施形態の射出成形用金型の部分断
面図であって、型閉状態を示す。FIG. 7 is a partial cross-sectional view of the injection molding die of the embodiment shown in FIG. 6, showing a mold closed state.
Ａ 樹脂製品 Ｃ 凹部 Ｅ アンダーカット部 １ 固定側型 ２ 可動側型 ３ 傾斜コア（突起部形成用傾斜コア） ４ 凹部形成用コア ４１ 凹部形成用コアピン ５ キャビティ A resin products C recess E Undercut part 1 Fixed side type 2 movable side type 3 Inclined core (oblique core for forming protrusions) 4 Core for forming recesses 41 Core pin for forming recess 5 cavities
Claims (2)
し、型閉時において型相互間に、型開閉方向に対して斜
めに進退動作される傾斜コアを用いて成形されるアンダ
ーカット部と、傾斜コアの進退動作の軌跡によって形成
される傾斜コアのスライド領域内に型開閉方向でアンダ
ーカット部から遠ざかる方向に向かって凹む凹部とを有
するキャビティが形成される射出成形用金型において、
傾斜コアが配設される固定側型または可動側型に、型開
閉方向に進退動作される凹部を形成するための凹部形成
用コアを設け、傾斜コアと凹部形成用コアは、傾斜コア
の一部が凹部形成用コアの底面に接触した状態で重ね合
わされ、凹部形成用コアの型開閉方向への進出移動に連
動して、傾斜コアがアンダーカット部から離れる方向に
進出動作するようになされていることを特徴とする射出
成形用金型。1. An undercut which allows a fixed side mold and a movable side mold to be opened and closed with each other, and is formed by using an inclined core that is moved forward and backward with respect to the mold opening and closing direction between the molds when the molds are closed. In an injection-molding die, a cavity is formed that has a concave portion and a concave portion that is recessed toward a direction away from an undercut portion in a mold opening / closing direction in a slide region of the inclined core formed by a trajectory of a forward / backward movement of the inclined core. ,
A fixed side mold or a movable side mold on which the inclined core is arranged is provided with a concave portion forming core for forming a concave portion that is moved forward and backward in the mold opening and closing direction. The portions are overlapped with each other in contact with the bottom surface of the recess forming core, and the inclined core moves in the direction away from the undercut portion in association with the advance movement of the recess forming core in the mold opening / closing direction. A mold for injection molding, which is characterized in that
スライド領域外に、凹部形成用コアを型開閉方向に進退
動作させる凹部形成用コアピンを設けていることを特徴
とする請求項１に記載の射出成形用金型。2. The recess forming core pin for advancing and retracting the recess forming core in the mold opening and closing direction is provided outside the inclined core sliding area on the bottom surface of the recess forming core. Injection mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001317072A JP2003117952A (en) | 2001-10-15 | 2001-10-15 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001317072A JP2003117952A (en) | 2001-10-15 | 2001-10-15 | Injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003117952A true JP2003117952A (en) | 2003-04-23 |
Family
ID=19134996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001317072A Pending JP2003117952A (en) | 2001-10-15 | 2001-10-15 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003117952A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101234028B1 (en) * | 2012-05-07 | 2013-02-19 | 주식회사 삼우금형 | Injection mold for molding complex undercut portion |
| CN108284546A (en) * | 2017-01-10 | 2018-07-17 | 汉达精密电子(昆山)有限公司 | The exit structure of mold |
| WO2023042281A1 (en) * | 2021-09-15 | 2023-03-23 | 株式会社テクノクラーツ | Slide mechanism, undercut processing mechanism, and molding die |
-
2001
- 2001-10-15 JP JP2001317072A patent/JP2003117952A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101234028B1 (en) * | 2012-05-07 | 2013-02-19 | 주식회사 삼우금형 | Injection mold for molding complex undercut portion |
| CN108284546A (en) * | 2017-01-10 | 2018-07-17 | 汉达精密电子(昆山)有限公司 | The exit structure of mold |
| WO2023042281A1 (en) * | 2021-09-15 | 2023-03-23 | 株式会社テクノクラーツ | Slide mechanism, undercut processing mechanism, and molding die |
| WO2023042719A1 (en) * | 2021-09-15 | 2023-03-23 | 株式会社テクノクラーツ | Slide mechanism, undercut processing mechanism, and molding die |
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