JP2000141433A - Link type angularly sliding structure in injection molding tool - Google Patents

Link type angularly sliding structure in injection molding tool

Info

Publication number
JP2000141433A
JP2000141433A JP10318823A JP31882398A JP2000141433A JP 2000141433 A JP2000141433 A JP 2000141433A JP 10318823 A JP10318823 A JP 10318823A JP 31882398 A JP31882398 A JP 31882398A JP 2000141433 A JP2000141433 A JP 2000141433A
Authority
JP
Japan
Prior art keywords
mold
retreat
mold plate
setting member
link
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.)
Granted
Application number
JP10318823A
Other languages
Japanese (ja)
Other versions
JP3697546B2 (en
Inventor
Hiroyuki Mochizuki
博行 望月
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.)
YUSEI KIKO KK
Original Assignee
YUSEI KIKO KK
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 YUSEI KIKO KK filed Critical YUSEI KIKO KK
Priority to JP31882398A priority Critical patent/JP3697546B2/en
Publication of JP2000141433A publication Critical patent/JP2000141433A/en
Application granted granted Critical
Publication of JP3697546B2 publication Critical patent/JP3697546B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/40Removing or ejecting moulded articles
    • B29C45/44Removing or ejecting moulded articles for undercut articles
    • B29C45/4435Removing or ejecting moulded articles for undercut articles using inclined, tiltable or flexible undercut forming elements driven by the ejector means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/40Removing or ejecting moulded articles
    • B29C45/44Removing or ejecting moulded articles for undercut articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a new link type angular sliding structure, with which the reduction of the mold making cost, maintenance cost and the like is contrived by a method wherein the retreating structure from an undercut portion is composed simply at the injection molding of the product having the undercut portion. SOLUTION: In this link type angularly sliding structure, with a mold 1 consisting of a fixed retainer plate 2 and a movable retainer plate 3 as major members, a retreat setting member 4 is provided at the treating side of the movable retainer plate 3. In the retreat setting member 4, an articulated sliding unit 5 projecting to an undercut portion UC is assembled under the state being pivotally held so constituted as to retreat the sliding unit 5 from the undercut portion in response to the relative separation between the movable retainer plate 3 and the retreat setting member 4. In addition, the sliding unit 5 has a two-link structure, in which a link 51 and a link shaft 52 are pivotally connected with each other.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は射出成形を行う際の
金型に関するものであって、特に金型の分離方向(抜き
方向)に対して引っ掛かりとなるアンダカット部分が、
成形対象となる製品に存在する場合に、金型の離型に伴
い、このアンダカット部分からの退去を円滑に行う構造
に係るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for performing injection molding, and more particularly, to an undercut portion which is caught in a mold separating direction (drawing direction).
The present invention relates to a structure in which, when present in a product to be molded, the retreat from the undercut portion is smoothly performed as the mold is released.

【0002】[0002]

【発明の背景】例えば一挙に大量のプラスチック製品を
加工する手法として射出成形が一般的に広く知られてお
り、種々の製品に適用されている。この手法は、通常一
対の固定型板と可動型板とを具えて成る金型内に、溶融
状態の樹脂材料を高い圧力で射出し、適宜の形状に成形
するものである。ここで製品を金型から取り出す際、そ
の取り出し方向すなわち金型の分離方向に対して、製品
の側面に出っ張りや引っ込み部分があると、金型から取
り出すことができない場合がある。このように固定型板
と可動型板の通常の分離方向(抜き方向)では取り出し
切れない、引っ掛かり部分が製品におけるアンダカット
と称される部分であり、因みにその例としては箱状製品
の側面に形成される孔や、カップの把手等が挙げられ
る。
BACKGROUND OF THE INVENTION For example, injection molding is widely known as a technique for processing a large number of plastic products at once, and is applied to various products. In this method, a resin material in a molten state is injected at a high pressure into a mold usually including a pair of fixed mold plates and a movable mold plate, and molded into an appropriate shape. Here, when the product is taken out of the mold, if there is a protrusion or a recess on the side surface of the product in the take-out direction, that is, the separating direction of the mold, the product may not be able to be taken out of the mold. In this way, the catching portion which cannot be taken out in the normal separating direction (pulling direction) of the fixed mold plate and the movable mold plate is a portion called an undercut in the product. A hole to be formed, a handle of a cup, and the like can be given.

【0003】そしてこのようなアンダカット部分が成形
すべき製品に存在する際には、例えばその製品の材料に
ポリエチレンやポリプロピレン等の弾性に富む材料が適
用されていれば、無理抜きと呼ばれる、製品を金型から
強制的に離型させる方法が可能ではあるものの、多くの
場合はアンダカット部分をスライドコアと称される摺動
ブロックで形成し、このスライドコアを可動型板上にス
ライド自在に設け、金型の離型に伴いアンダカット部を
逃がすように構成するものである。このスライドコア構
造は一例として図3に示すように、固定型板2′に設け
られるアンギュラピンAPが、金型1′の分離方向に対
して適宜の角度を有するように形成されるものである。
そして成形状態においては、このアンギュラピンAPが
図3(a)に示すようにスライドコアSCに嵌め込まれ
るように構成され、金型1′の離型状態においては、図
3(b)に示すように可動型板3′の退去に伴い、スラ
イドコアSCがアンギュラピンAPに案内されてアンダ
カット部分UCを回避するものである。因みに図示した
構造においては、スライドコアSCがアンギュラピンA
Pに案内されて下方に移動している。
[0003] When such an undercut portion is present in a product to be molded, for example, if a material having high elasticity such as polyethylene or polypropylene is applied to the material of the product, the product is referred to as a product without force. Although it is possible to forcibly release the mold from the mold, in many cases, the undercut portion is formed by a slide block called a slide core, and the slide core is slidably movable on a movable mold plate. The undercut part is released with the release of the mold. In this slide core structure, as shown in FIG. 3 as an example, the angular pin AP provided on the fixed mold plate 2 'is formed so as to have an appropriate angle with respect to the separating direction of the mold 1'. .
In the molding state, the angular pin AP is configured to be fitted into the slide core SC as shown in FIG. 3A, and in the mold release state of the mold 1 ', as shown in FIG. When the movable mold plate 3 'retreats, the slide core SC is guided by the angular pin AP to avoid the undercut portion UC. In the structure shown in the figure, the slide core SC has an angular pin A
It is guided by P and is moving downward.

【0004】しかしながらこのようなスライドコア構造
においては以下に示すような点において問題が生じてい
た。すなわちこのような手法においては通常スライドコ
アSCが、可動型板3′の退去に伴い、退去方向とほぼ
90°の角度を成す、金型分割面(パーティングライ
ン)PL上をスライドするため、ある程度金型1′その
ものが複雑化することや大型化することは免れ得ず、結
果的に金型1′の製造コスト等を上昇させる要因となっ
ていた。またこのようなことに加えて実際の射出成形用
金型においては適宜の形状を有するキャビティ部分の周
囲には、スライドコアSCだけでなく、例えば溶融樹脂
を金型1′内に充填した後、これを冷却するための冷却
孔や、金型1′が分離した後、可動型板3′等に張り付
いた製品Aを突き出すエジェクタピン等も構成しなけれ
ばならないが、スライドコアSCの大きさや数あるいは
その移動スペースの確保等によってこれら冷却孔やエジ
ェクタピン等の配置等が規制され、その自由度が低下す
るという問題もあった。
However, such a slide core structure has a problem in the following points. That is, in such a method, the slide core SC normally slides on the mold dividing surface (parting line) PL, which forms an angle of approximately 90 ° with the retreat direction with the retreat of the movable mold plate 3 ′. It is unavoidable that the mold 1 'itself becomes complicated and large to some extent, and as a result, it has been a factor of increasing the manufacturing cost of the mold 1'. In addition to the above, in the actual injection mold, not only the slide core SC but also, for example, the molten resin is filled into the mold 1 'around the cavity having an appropriate shape. A cooling hole for cooling this, an ejector pin for projecting the product A stuck to the movable mold plate 3 ′ after the mold 1 ′ is separated, and the like must also be formed. The arrangement of the cooling holes, the ejector pins, and the like is restricted by the number or the securing of the moving space, and the degree of freedom is reduced.

【0005】[0005]

【開発を試みた技術的課題】本発明はこのような背景を
認識してなされたものであって、アンダカット部分を有
した製品を射出成形する際、金型部材の一部をアンダカ
ット部分からスムーズに退去させるとともに、その退去
構造をよりシンプルに構成し、金型の製造費用や維持費
用等の低減を図る新規なリンク式斜め抜きスライド構造
の開発を試みたものである。
SUMMARY OF THE INVENTION The present invention has been made in view of such a background, and when an injection-molded product having an undercut portion is used, a part of a mold member is partially removed by an undercut portion. And a new link-type slanting slide structure that attempts to reduce the manufacturing cost and maintenance cost of the mold by making the retreat structure simpler and to make the retreat structure smoother.

【0006】[0006]

【課題を解決するための手段】すなわち請求項1記載の
射出成形用金型におけるリンク式斜め抜きスライド構造
は、各々適宜の形状を有する固定型板と、可動型板とに
よって金型内部に適宜の形状を有するキャビティ部分を
形成し、このキャビティ部分に溶融樹脂を射出して成形
を行うにあたり、製品を金型から取り出す際に、その取
り出し方向である離型方向に対して引っ掛かりとなるア
ンダカット部分を有する製品を成形する射出成形用金型
において、前記可動型板の退去側には、退去設定部材を
設けるとともに、この退去設定部材に回動自在に保持さ
れながら、前記アンダカット部分まで突出する中折れ可
能なスライドユニットを組み込み、前記可動型板と退去
設定部材との相対的な離反に伴って、前記スライドユニ
ットが、アンダカット部分から退去するように構成され
ることを特徴として成るものである。この発明によれ
ば、金型の離型に伴いアンダカット部分から退去するス
ライドユニットをシンプルに構成できるため、その作動
がスムーズであり、金型コストの低減が図れる。またス
ライドユニットが比較的狭いスペースで配置できるた
め、成形直後の製品を突き出すエジェクタピン等の自由
度が高く、更に従来の構造に比べて退去ストロークが比
較的長く確保できる。
According to a first aspect of the present invention, there is provided a link type oblique slide structure in an injection mold, wherein a fixed mold plate having an appropriate shape and a movable mold plate are provided inside the mold. When a product is taken out of a mold when molding by molding a cavity by injecting molten resin into this cavity, an undercut that is caught in the release direction, which is the direction in which the product is taken out In the injection molding die for molding a product having a portion, a retreat setting member is provided on the retreat side of the movable mold plate, and the revolving setting member protrudes to the undercut portion while being rotatably held by the retreat setting member. The movable unit plate and the retreat setting member are relatively separated from each other. Those comprising as a feature that it is configured to leave the root section. According to the present invention, since the slide unit that retreats from the undercut portion as the mold is released can be simply configured, the operation is smooth and the cost of the mold can be reduced. In addition, since the slide unit can be arranged in a relatively narrow space, the degree of freedom of an ejector pin or the like for projecting a product immediately after molding is high, and a relatively long retreat stroke can be secured as compared with a conventional structure.

【0007】また請求項2記載の射出成形用金型におけ
るリンク式斜め抜きスライド構造は、前記請求項1記載
の要件に加え、前記スライドユニットは、二節リンク構
造であることを特徴として成るものである。この発明に
よれば、スライドユニットをよりシンプルに構成できる
とともに、金型の維持管理が容易に行える。
According to a second aspect of the present invention, there is provided a link type oblique slide structure in the injection mold according to the second aspect, wherein the slide unit has a two-node link structure. It is. ADVANTAGE OF THE INVENTION According to this invention, while a slide unit can be comprised more simply, maintenance of a metal mold | die can be performed easily.

【0008】[0008]

【発明の実施の形態】以下本発明を図示の実施の形態に
基づいて説明する。説明にあたっては、本発明を適用し
た金型1について概略的に説明した後、この金型1の作
動態様について説明しながら実質的に本発明のリンク式
斜め抜きスライド構造について説明する。金型1は、溶
融樹脂が内部に射出されて、適宜の形状を有する製品A
を成形するものであり、一例として図1に示すように固
定型板2と、可動型板3とを主要部材とし、これらに対
し退去設定部材4と、スライドユニット5とを組み込ん
で成るものである。そして金型1は、主要部材たる固定
型板2と、可動型板3とがNC(数値制御)機械等によ
って精密にモールドされ、一対に組み合わされて、溶融
樹脂が射出されるキャビティ部分を形成するものであ
る。この際それぞれの型板に直接モールドすることも可
能であるが、多くは別途モールドされたブロック部材を
各型板に嵌め込む構造を採る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In the description, the mold 1 to which the present invention is applied will be schematically described, and then the link type oblique slide structure of the present invention will be substantially described while describing the operation mode of the mold 1. The mold 1 has a product A having an appropriate shape, into which a molten resin is injected.
As an example, as shown in FIG. 1, a fixed mold plate 2 and a movable mold plate 3 are used as main members, and a retreat setting member 4 and a slide unit 5 are incorporated therein. is there. In the mold 1, the fixed mold plate 2 and the movable mold plate 3, which are main members, are precisely molded by an NC (numerical control) machine or the like, and are combined into a pair to form a cavity portion into which the molten resin is injected. Is what you do. At this time, it is possible to directly mold each template, but in many cases, a separately molded block member is fitted into each template.

【0009】そして本発明では、対象とする製品Aにお
いて、これを取り出す際、金型1の分離方向に対して引
っ掛かりとなるアンダカット部分UCの存在を前提とす
る。また金型1には上述した構成部材のほかに、注入さ
れた樹脂材料を冷却するための冷却孔、あるいは成形後
の製品Aを金型1から突き出すエジェクタピン等が適宜
の位置に形成される。なお図1に示す実施の形態では、
金型1がほぼ水平方向に分離するような形態を示した
が、ほぼ鉛直方向に分離する形態等種々の形態が採り得
る。以下各構成部について説明する。
In the present invention, it is assumed that the product A to be taken out has an undercut portion UC which is caught in the separating direction of the mold 1 when the product A is taken out. In addition to the components described above, the mold 1 is provided with cooling holes for cooling the injected resin material, ejector pins for projecting the molded product A from the mold 1, and the like at appropriate positions. . In the embodiment shown in FIG.
Although the form in which the mold 1 is separated in a substantially horizontal direction is shown, various forms such as a form in which the mold 1 is separated in a substantially vertical direction can be adopted. Hereinafter, each component will be described.

【0010】固定型板2は、成形時に、樹脂材料を加熱
し溶融する加熱シリンダに対して、固定状態に設けら
れ、加熱シリンダから溶融樹脂が注入されるものであ
り、加熱シリンダとの接合部に原料注入部となるスプル
ーやランナあるいはゲート等が形成され、これらを介し
てキャビティ部分に溶融樹脂が注入される。
The fixed mold plate 2 is provided in a fixed state with respect to a heating cylinder that heats and melts the resin material during molding, and the molten resin is injected from the heating cylinder. A sprue, a runner, a gate, or the like serving as a raw material injection section is formed in the cavity, and the molten resin is injected into the cavity through these.

【0011】一方可動型板3は、金型1の離型に伴って
成形直後の製品Aを取り出せるように、固定型板2から
退去するように構成されるものであり、またその内部に
は適宜の位置に、後述するスライドユニット5を案内す
るガイド部31が形成されている。従ってこのガイド部
31は、アンダカット部分UCと同じ方向に形成される
ものであり、可動型板3の退去方向すなわち金型退去方
向に対しては適宜の角度を有するように設けられる。な
おガイド部31には、一例として図2に示すようにガイ
ドシリンダ32や、ガイド孔33が適用されるものであ
る。また通常の金型構造では、冷却が終わって金型1が
開くと、まず製品Aをこの可動型板3に残し、型開きの
動作と関連を保ちながら可動型板3からエジェクタピン
等によって突き出すようにしている。
On the other hand, the movable mold plate 3 is configured to retreat from the fixed mold plate 2 so that the product A immediately after molding can be taken out with the release of the mold 1, and the movable mold plate 3 has an inside thereof. A guide portion 31 for guiding the slide unit 5 described later is formed at an appropriate position. Therefore, the guide portion 31 is formed in the same direction as the undercut portion UC, and is provided so as to have an appropriate angle with respect to the retreat direction of the movable mold plate 3, that is, the mold retreat direction. Note that, as an example, a guide cylinder 32 and a guide hole 33 are applied to the guide portion 31 as shown in FIG. Further, in the normal mold structure, when the mold 1 is opened after cooling, the product A is left on the movable mold plate 3 and is ejected from the movable mold plate 3 by an ejector pin or the like while maintaining the relation with the mold opening operation. Like that.

【0012】次に退去設定部材4について説明する。こ
のものは可動型板3の退去側に設けられるものであり、
可動型板3に対して相対的に離反することによって実質
的にスライドユニット5をアンダカット部分UCから退
去させるものである。なおスライドユニット5の回動基
端側は、別途形成される取付けブロック41によって保
持され、この取付けブロック41が六角穴付きボルトB
等によって退去設定部材4に固定されるものである。ま
たこのため退去設定部材4におけるスライドユニット5
の回動基端部には、実質的にスライドユニット5を適宜
の角度、回動可能とする開放空間42が形成されてい
る。
Next, the retreat setting member 4 will be described. This is provided on the retreat side of the movable mold plate 3,
The slide unit 5 is substantially retreated from the undercut portion UC by relatively moving away from the movable mold plate 3. The rotation base end side of the slide unit 5 is held by a separately formed mounting block 41, and the mounting block 41
It is fixed to the retreat setting member 4 by the above-mentioned method. For this reason, the slide unit 5 in the retreat setting member 4
An open space 42 that allows the slide unit 5 to rotate substantially at an appropriate angle is formed at the base end of the rotary shaft.

【0013】次にスライドユニット5について説明す
る。このものは金型1の離型に伴いアンダカット部分U
Cから退去するように構成されるものであり、一例とし
て図2に併せて示すように退去設定部材4に回動自在に
保持されるリンク51と、このリンク51に一端を回動
自在に連結されるとともに他の先端部がアンダカット部
分UCにまで突出するリンクシャフト52とを具えて成
るものである。ここでリンクシャフト52の先端部に形
成され、前記アンダカット部分UCまで突出する部位を
突出部52aと符号を付し、製品Aに形成される実質的
なアンダカット部分UCに対してより明確に区別するも
のである。また退去設定部材4とリンク51との接続部
を基端部53、リンク51とリンクシャフト52との接
続部を連結部54として区別する。なおスライドユニッ
ト5が上述したガイドシリンダ32やガイド孔33にス
ライド自在に嵌め込まれるとともに、リンク51とリン
クシャフト52とが、連結部54において中折れ自在に
構成されることによって、リンクシャフト52の突出部
52aをアンダカット部分UCから退去させるものであ
る。またこの実施の形態ではスライドユニット5は、リ
ンク51と、リンクシャフト52とを連結して成る二節
リンク構造を採るものであるが、三節リンク構造等を採
ることも可能である。
Next, the slide unit 5 will be described. This is an undercut part U
The link 51 is rotatably held by the retreat setting member 4 as shown in FIG. 2 as an example, and one end is rotatably connected to the link 51. And a link shaft 52 whose other end projects to the undercut portion UC. Here, a portion formed at the distal end portion of the link shaft 52 and protruding to the undercut portion UC is denoted by a protruding portion 52a, so that the substantial undercut portion UC formed on the product A is more clearly defined. It is to distinguish. Further, the connecting portion between the retreat setting member 4 and the link 51 is distinguished as a base end portion 53, and the connecting portion between the link 51 and the link shaft 52 is distinguished as a connecting portion 54. The slide unit 5 is slidably fitted in the guide cylinder 32 and the guide hole 33 described above, and the link 51 and the link shaft 52 are formed so as to be able to bend at the connecting portion 54 so that the protrusion of the link shaft 52 is prevented. The part 52a is withdrawn from the undercut portion UC. Further, in this embodiment, the slide unit 5 has a two-joint link structure formed by connecting the link 51 and the link shaft 52, but may have a three-joint link structure or the like.

【0014】次に以上のように構成された金型1の作動
態様について説明しながら実質的に本発明のリンク式斜
め抜きスライド構造について説明する。 (1)成形状態 まず実質的な成形に先立ち、可動型板3を型締シリンダ
等の型締装置によって固定型板2に合わせるまで移動さ
せ、金型1を図1(a)に示すような成形状態に設定し
た後、更に金型1内に射出される樹脂材料によって、金
型1が開くことがないように締め付ける。この際金型1
内部では、固定型板2と、可動型板3とによって適宜の
キャビティ部分が形成されている。その後溶融樹脂が、
加熱シリンダからスプルー、ランナ、ゲート等の原料注
入部を通って、このキャビティ部分に一定量射出され
る。そして溶融樹脂は、金型1の内部で冷却液によって
熱を奪われ、徐々に硬化し実質的な成形を終了する。
Next, the link type oblique slide structure of the present invention will be described with reference to the operation of the mold 1 having the above-described structure. (1) Molding state First, prior to substantial molding, the movable mold plate 3 is moved by a mold clamping device such as a mold clamping cylinder until the movable mold plate 3 is fitted to the fixed mold plate 2, and the mold 1 is moved as shown in FIG. After the molding state is set, the resin material injected into the mold 1 is further tightened so that the mold 1 is not opened. At this time, mold 1
Inside, the fixed mold plate 2 and the movable mold plate 3 form an appropriate cavity portion. Then the molten resin,
A predetermined amount is injected from the heating cylinder into the cavity through a material injection portion such as a sprue, a runner, and a gate. Then, the molten resin is deprived of heat by the cooling liquid inside the mold 1 and gradually hardens to substantially complete the molding.

【0015】(2)離型状態 次に成形した製品Aを金型1から取り出すため、金型1
を図1(b)に示すような離型状態とする。その際可動
型板3を固定型板2から退去させる作動と、退去設定部
材4を可動型板3から相対的に離反させる作動に分けて
説明する。 (i)可動型板を固定型板から退去させる作動 可動型板3を固定型板2から退去させる際には、型締シ
リンダ等の型締装置によって行われ、その際可動型板3
は、少なくとも成形した製品Aが固定型板2等にぶつか
ることなく、確実に取り出せる程度の退去寸法を確保す
るものである。
(2) Release state Next, in order to take out the molded product A from the mold 1, the mold 1
In a mold release state as shown in FIG. At this time, an operation for moving the movable mold plate 3 away from the fixed mold plate 2 and an operation for relatively moving the retreat setting member 4 away from the movable mold plate 3 will be described. (I) Operation of moving the movable mold plate from the fixed mold plate When the movable mold plate 3 is moved away from the fixed mold plate 2, the movable mold plate 3 is moved by a mold clamping device such as a mold clamping cylinder.
Is to secure a retreat dimension such that at least the molded product A can be reliably taken out without hitting the fixed mold plate 2 or the like.

【0016】(ii)退去設定部材を可動型板から離反さ
せる作動 上述した可動型板3と固定型板2との離型作動に伴い、
またはこの作動の前後において、退去設定部材4を可動
型板3から相対的に離反させる作動が行われる。なお説
明にあたっては、可動型板3を停止させたまま、退去設
定部材4のみを金型退去方向に離反させる形態を基本的
に説明するものであって、可動型板3と退去設定部材4
との密着状態を図2(a)に、また双方の離反状態を図
2(b)に示す。そして退去設定部材4を金型退去方向
に離反させることによって、スライドユニット5の基端
部53は、金型退去方向に沿って離反寸法分移動し、一
方連結部54は、ガイド部31に規制されるためガイド
部31の形成方向すなわちアンダカット方向に移動し、
突出部52aをアンダカット部分UCから退去させるも
のである。
(Ii) Operation for separating the retreat setting member from the movable mold plate With the release operation of the movable mold plate 3 and the fixed mold plate 2 described above,
Alternatively, before and after this operation, an operation of relatively moving the retreat setting member 4 away from the movable mold plate 3 is performed. In the description, a mode in which only the retreat setting member 4 is separated in the mold retreating direction while the movable mold plate 3 is stopped is basically described, and the movable mold plate 3 and the retreat setting member 4 are separated.
FIG. 2 (a) shows the state of close contact with, and FIG. 2 (b) shows the state of separation from both. Then, by moving the retreat setting member 4 away from the mold in the mold retreat direction, the base end portion 53 of the slide unit 5 moves by the retreat dimension in the mold retreat direction, while the connecting portion 54 is restricted by the guide portion 31. Therefore, it moves in the forming direction of the guide portion 31, that is, in the undercut direction,
The protrusion 52a is withdrawn from the undercut portion UC.

【0017】またこのような作動によりリンク51は基
端部53を中心として開放空間42を回動し、リンクシ
ャフト52はガイド部31に規制されながらスライド
し、スライドユニット5全体としては、リンク51とリ
ンクシャフト52とを、連結部54において屈曲するよ
うな中折れ状態を呈するものである。なおこの実施の形
態では、上述したように可動型板3を停止させたまま、
退去設定部材4のみを金型退去方向に離反させる形態を
採るが、例えばその反対に退去設定部材4を停止させた
まま、可動型板3を固定型板2側に離反させる形態等種
々の形態が採り得るものであって、いずれの形態におい
ても退去設定部材4と、可動型板3とを相対的に離反さ
せ得るものであれば、どのような形態であっても構わな
い。
With such an operation, the link 51 rotates in the open space 42 about the base end 53, and the link shaft 52 slides while being regulated by the guide portion 31. And a link shaft 52 in a bent state at the connecting portion 54. In this embodiment, while the movable mold plate 3 is stopped as described above,
Various forms such as a form in which only the retreat setting member 4 is separated in the mold retreating direction, for example, a form in which the movable mold plate 3 is separated toward the fixed mold plate 2 while the retreat setting member 4 is stopped are taken. And any form may be used as long as the retreat setting member 4 and the movable mold plate 3 can be relatively separated from each other.

【0018】(3)製品の取り出し 以上のように可動型板3を固定型板2から退去させる作
動と、退去設定部材4を可動型板3から相対的に離反さ
せる作動とを終了した後、適宜必要な位置に形成されて
いるエジェクタピン等によって製品Aを突き出し、金型
1から取り出して、一ショットの成形を終了する。
(3) Removal of Product After the operation of moving the movable mold plate 3 away from the fixed mold plate 2 and the operation of moving the retreat setting member 4 relatively away from the movable mold plate 3 as described above, The product A is protruded by an ejector pin or the like formed at a necessary position as appropriate, taken out of the mold 1, and the molding of one shot is completed.

【0019】[0019]

【発明の効果】まず請求項1記載の射出成形用金型にお
けるリンク式斜め抜きスライド構造によれば、金型1の
離型に伴いアンダカット部分UCから退去するスライド
ユニット5をシンプルに構成できるため、その作動がス
ムーズであり、金型コストの低減が図れる。またスライ
ドユニット5が比較的狭いスペースで配置できるため、
成形直後の製品Aを突き出すエジェクタピン等の自由度
が高く、更に従来の構造に比べて退去ストロークが比較
的長く確保できる。
According to the first aspect of the present invention, the slide unit 5 which retreats from the undercut portion UC with the release of the mold 1 can be simply constructed. Therefore, the operation is smooth, and the die cost can be reduced. Also, since the slide unit 5 can be arranged in a relatively narrow space,
The degree of freedom of an ejector pin or the like that projects the product A immediately after molding is high, and a relatively long retreat stroke can be secured as compared with a conventional structure.

【0020】また請求項2記載の射出成形用金型におけ
るリンク式斜め抜きスライド構造によれば、スライドユ
ニット5をよりシンプルに構成できるとともに、金型1
の維持管理が容易に行える。
According to the link-type oblique slide structure in the injection mold according to the second aspect, the slide unit 5 can be configured more simply and the mold 1 can be used.
Can be easily maintained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明を適用した金型の成形状態を示す説明図
(a)、並びに離型状態を示す説明図(b)、並びにこ
のような状態変化に伴いスライドユニットがアンダカッ
ト部分から退去する状態を示す斜視図(c)である。
FIG. 1A is an explanatory view showing a molding state of a mold to which the present invention is applied, FIG. 1B is an explanatory view showing a releasing state, and the slide unit retreats from the undercut portion in accordance with such a state change. It is a perspective view (c) which shows the state which performs.

【図2】スライドユニットの初期状態を示す説明図
(a)、並びに作動状態を示す説明図(b)である。
FIGS. 2A and 2B are an explanatory diagram illustrating an initial state of the slide unit and an explanatory diagram illustrating an operating state of the slide unit; FIGS.

【図3】従来のスライドコア構造を適用した金型の成形
状態を示す説明図(a)、並びに離型状態を示す説明図
(b)である。
3A is an explanatory view showing a molding state of a mold to which a conventional slide core structure is applied, and FIG. 3B is an explanatory view showing a releasing state.

【符号の説明】[Explanation of symbols]

1 金型 2 固定型板 3 可動型板 4 退去設定部材 5 スライドユニット 31 ガイド部 32 ガイドシリンダ 33 ガイド孔 41 取付けブロック 42 開放空間 51 リンク 52 リンクシャフト 52a 突出部 53 基端部 54 連結部 A 製品 B 六角穴付きボルト AP アンギュラピン PL 金型分割面(パーティングライン) SC スライドコア UC アンダカット部分 Reference Signs List 1 mold 2 fixed mold plate 3 movable mold plate 4 retreat setting member 5 slide unit 31 guide portion 32 guide cylinder 33 guide hole 41 mounting block 42 open space 51 link 52 link shaft 52a projecting portion 53 base end portion 54 connecting portion A product B Hexagon socket head bolt AP Angular pin PL Mold parting surface (Parting line) SC Slide core UC Undercut

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 各々適宜の形状を有する固定型板と、可
動型板とによって金型内部に適宜の形状を有するキャビ
ティ部分を形成し、このキャビティ部分に溶融樹脂を射
出して成形を行うにあたり、製品を金型から取り出す際
に、その取り出し方向である離型方向に対して引っ掛か
りとなるアンダカット部分を有する製品を成形する射出
成形用金型において、前記可動型板の退去側には、退去
設定部材を設けるとともに、この退去設定部材に回動自
在に保持されながら、前記アンダカット部分まで突出す
る中折れ可能なスライドユニットを組み込み、前記可動
型板と退去設定部材との相対的な離反に伴って、前記ス
ライドユニットが、アンダカット部分から退去するよう
に構成されることを特徴とする射出成形用金型における
リンク式斜め抜きスライド構造。
1. A method for forming a cavity portion having an appropriate shape in a mold by a fixed mold plate having an appropriate shape and a movable mold plate, and injecting a molten resin into the cavity portion for molding. In taking out a product from a mold, in an injection molding mold for molding a product having an undercut portion that is caught in a release direction that is a takeout direction, on the retreat side of the movable mold plate, A retreat setting member is provided, and a slide unit that can be bent and folded to project to the undercut portion while being rotatably held by the retreat setting member is incorporated, and a relative separation between the movable mold plate and the retreat setting member is provided. Wherein the slide unit is configured to withdraw from the undercut portion. Ride structure.
【請求項2】 前記スライドユニットは、二節リンク構
造であることを特徴とする請求項1記載の射出成形用金
型におけるリンク式斜め抜きスライド構造。
2. A slide type slide structure for an injection mold according to claim 1, wherein said slide unit has a two-link structure.
JP31882398A 1998-11-10 1998-11-10 Link-type oblique punching slide structure in injection mold Expired - Fee Related JP3697546B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31882398A JP3697546B2 (en) 1998-11-10 1998-11-10 Link-type oblique punching slide structure in injection mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31882398A JP3697546B2 (en) 1998-11-10 1998-11-10 Link-type oblique punching slide structure in injection mold

Publications (2)

Publication Number Publication Date
JP2000141433A true JP2000141433A (en) 2000-05-23
JP3697546B2 JP3697546B2 (en) 2005-09-21

Family

ID=18103362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31882398A Expired - Fee Related JP3697546B2 (en) 1998-11-10 1998-11-10 Link-type oblique punching slide structure in injection mold

Country Status (1)

Country Link
JP (1) JP3697546B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104526968A (en) * 2014-12-17 2015-04-22 重庆鼎盛印务股份有限公司 Forced demoulding device for injection molds
CN110328816A (en) * 2019-08-12 2019-10-15 华域视觉科技(上海)有限公司 A kind of reverse buckle demolding mechanism and injection mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104526968A (en) * 2014-12-17 2015-04-22 重庆鼎盛印务股份有限公司 Forced demoulding device for injection molds
CN110328816A (en) * 2019-08-12 2019-10-15 华域视觉科技(上海)有限公司 A kind of reverse buckle demolding mechanism and injection mold

Also Published As

Publication number Publication date
JP3697546B2 (en) 2005-09-21

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