JP2761865B2 - Multi-cavity runnerless molding device with built-in cam spindle and action type needle valve - Google Patents
Multi-cavity runnerless molding device with built-in cam spindle and action type needle valveInfo
- Publication number
- JP2761865B2 JP2761865B2 JP8075096A JP7509696A JP2761865B2 JP 2761865 B2 JP2761865 B2 JP 2761865B2 JP 8075096 A JP8075096 A JP 8075096A JP 7509696 A JP7509696 A JP 7509696A JP 2761865 B2 JP2761865 B2 JP 2761865B2
- Authority
- JP
- Japan
- Prior art keywords
- needle valve
- cavity
- cam spindle
- built
- flange
- 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 - Lifetime
Links
- 238000000465 moulding Methods 0.000 title claims description 30
- 230000033001 locomotion Effects 0.000 claims description 15
- 229920005989 resin Polymers 0.000 description 20
- 239000011347 resin Substances 0.000 description 20
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 238000001746 injection moulding Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
- B29C45/281—Drive means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
- B29C45/281—Drive means therefor
- B29C2045/2831—Needle valves driven by a cam
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、成型加工を行なう所
謂、合成樹脂精密成型工場等に在っては、絶対必要不可
欠なる成型装置のエレメントに斯かるものである事から
して、産業上の利用分野としては、それこそ、日本全国
に股がる合成樹脂精密成型工場の、全分野に亘るものと
云えよう。BACKGROUND OF THE INVENTION The present invention relates to an element of a molding device which is absolutely indispensable in a so-called synthetic resin precision molding factory for performing a molding process. It can be said that this is an application field of synthetic resin precision molding factories all over Japan.
【０００２】[0002]
【従来の技術】本発明は、一般合成樹脂精密成型業界に
於て、以前から問題視されていたにも不抱らず、今尚、
大きな問題を投げかけている、ニードルバルブ内蔵型多
数個取りランナーレス成型装置に斯る、最も合理的にし
て然も新規なる提案に関するものである。扨て、従来よ
り成型加工を行なう、所謂、一般合成樹脂精密成型工場
等に在っては、高温の溶融樹脂を金型キャビティに対
し、高圧の状態にて射出充填完了後、直ちに其のゲート
ホールを閉止せしめる事に依り、成型製品と射出口側の
溶融樹脂とを分離する工法が常套手段とされ今日に至っ
ているのである。が、斯かるゲートホール閉止の手段と
しては、一般に、ランナー内に装着されたニードルに対
し往復衝程運動を与える、所謂、ニードルバルブ方式が
その大勢を占めて居る事は周知の所である。扨て、斯か
るニードルバルブ内蔵方式の基本とも云うべき、往復衝
程運動を付加する手段としては、現在、其の殆どがニー
ドルバルブ本体の中央部より頭部に掛かる部分（即ち、
半分から上の部分を指す）が、ランナーを貫通してマニ
ホールド金型装置の外部に至る迄、ソックリ露出せしめ
其の露出部分に対し、例えば、弦巻スプリングを掛止す
るとか或いは亦、エアー駆動源に接続のエアーシリンダ
ー等のメカを組み込む事に依り、前記せる、ニードルバ
ルブに対し往復衝程運動（一般的には、押し込み方向の
運動）を付与している状況に在る。然し乍ら、斯かる如
き在来技術に基づいた駆動手段に在っては、実は、根本
的な重大問題が存在するので在った。即ち、斯かる重大
問題とは、凡そ次の通りである。 ．射出時（即ち、ニードルバルブ上昇後退時）並びに
休止時（即ち、ニードルバルブ下降前進時）夫々の状態
に於ける、ランナー内溶融樹脂容積に大差が生ずると云
った厳然たる事実が存在する事なのである。斯かる現象
は、例えば休止時（ニードルバルブ下降前進時）に在っ
ては、金型の取り数に対応した数のニードルバルブが、
溶融樹脂が充満しているランナー内に、１００％存在し
ている（即ち、ドップリ浸漬している状態を示す）事と
なるが、一方、射出時（ニードルバルブ上昇後退時）に
在っては、ニードルバルブ本体其のものが上昇後退する
結果、今迄、溶融樹脂が充満していたランナー内容積
が、ニードルバルブの上昇後退した容積相当分だけ急激
に増加する事となり、此に於て、容積増加相当分の圧力
減少を来す結果、溶融樹脂が新たに流入増加するに至
り、ランナー内は再び溶融樹脂が充満した状態に戻る事
となる。 ．然うして、次の成型作業工程に於て射出充填が完了
し、直ちにニードルバルブが再びゲートホールを閉止す
る為、下降前進せんとするも、最早、前進運動は極めて
困難なる状態に至るものである。（即ち、溶融樹脂も含
め一般に流体は、其の物性が非圧縮性で在るからで有
る）。 ．斯るが故、この状態に於いて、ニードルバルブの下
降前進力を付加せんが為には、勢い、強力な弦巻スプリ
ング（此処では、強力な圧縮スプリング）を用いたり或
いは亦、高圧エアー駆動源に接続のエアーシリンダー等
を使用せざるを得ない状態に置かれている現状に在る。 ．然し乍ら、前項に於いて詳述せる諸々の対策並び
に方法と云えども、所詮、作動時に於ける摩擦の問題や
疲労減少に基づく機械的物性の低下、…等々に依り、な
かなか、正常には作動し得ず、時に、成型製品表面部に
於けるストレスとなって出現するは、之亦、周知の処で
あり其の発生率が例え超低率であろうとも、之が、電子
部品等に使用される超精密部品等である場合に在って
は、到底、精蜜機能部品としては使用し得ず大問題とな
るものである。 ．そして更には、該、ニードルバルブ先端部のニード
ル部分と、金型側に於けるゲートホール部分との挿入時
に於ける嵌合状態は、之の種、ランナーレス成型システ
ム品質保障上に於ける最重要ポイントして、斯かる嵌合
状態こそが成型製品の品質其のものを左右していると云
っても過言では有るまい。然し乍ら、斯く云うものの在
来のメカを基本とせる現行システムに在っては、１ショ
ット毎に於ける瞬間のアクションを、客観的にチェック
する術は全く見られず、総ては、成型サイクル毎の出来
上がり製品（即ち、成型製品のこと）の官能検査（即
ち、目視に依る外観検査の意）に頼る以外、今のところ
方法が見られ無いと云った状況も亦、大きな問題点であ
り課題とも云えよう。 以上、詳記せる如く在来のニードルバルブ内蔵型多数個
取りランナーレス成型装置に在っては、今尚、数多くの
困難な問題や課題を抱えている現状に在ると云えよう。2. Description of the Related Art The present invention has been regarded as a problem in the general synthetic resin precision molding industry for a long time.
The present invention relates to a most probable and yet new proposal of a multi-cavity runnerless molding device with a built-in needle valve, which poses a major problem. Now, in the so-called general synthetic resin precision molding factory, etc., which conventionally performs molding processing, the injection of high-temperature molten resin into the mold cavity at high pressure is completed immediately after the completion of injection and filling. The method of separating the molded product from the molten resin on the injection port side by closing the hole is a routine method, and has been used today. However, it is well known that a so-called needle valve system, which generally provides a reciprocating stroke motion to a needle mounted in a runner, is widely used as a means for closing the gate hole. Now, as a means for adding a reciprocating stroke movement, which can be said to be the basic of such a needle valve built-in system, at present, most of the means extends from the central part of the needle valve body to the head (ie,
Half-upper part) is exposed sockly through the runner to the outside of the manifold mold apparatus, and for example, a helical spring is hung on the exposed part, or an air drive source is used. By incorporating a mechanism such as an air cylinder connected to the needle valve, the needle valve is given a reciprocating stroke movement (generally, a movement in a pushing direction). However, such a driving means based on the conventional technology actually existed because there was a fundamental serious problem. That is, such a serious problem is roughly as follows. . There is a strict fact that there is a large difference in the molten resin volume in the runner at the time of injection (i.e., when the needle valve rises and retracts) and at rest (i.e., when the needle valve descends and advances). . Such a phenomenon is caused, for example, when the needle valve is at rest (when the needle valve descends and advances), the number of the needle valves corresponding to the number of the molds is reduced.
In the runner filled with the molten resin, 100% exists (that is, indicates a state where the resin is immersed in a doppler). As a result, the needle valve body itself rises and retreats, and as a result, the inner volume of the runner, which has been filled with the molten resin until now, rapidly increases by an amount corresponding to the volume of the needle valve rising and retreating. As a result of the pressure decrease corresponding to the volume increase, the flow of the molten resin newly increases, and the inside of the runner returns to the state filled with the molten resin again. . Therefore, in the next molding work process, injection filling is completed, and immediately after the needle valve closes the gate hole again, it is possible to move downward, but the forward movement will be extremely difficult anymore. is there. (That is, fluids, including molten resins, generally have incompressible physical properties.) . Therefore, in this state, in order to apply the descending advance force of the needle valve, it is necessary to use a forceful, strong helical spring (here, a strong compression spring) or a high-pressure air drive source. At present, it is in a state where the air cylinder and the like connected to the airplane must be used. . However, even though the various measures and methods described in the preceding section are in detail, depending on the problem of friction at the time of operation and the deterioration of mechanical properties due to the reduction of fatigue, etc., it is quite difficult to operate normally. It is not well known that sometimes it appears as stress on the surface of the molded product, which is also a well-known process, and even if its occurrence rate is extremely low, it is used for electronic parts etc. In the case of a super-precision part or the like, which cannot be used as a finely functional part, it is a serious problem. . Furthermore, the fitting state at the time of insertion of the needle portion at the tip of the needle valve and the gate hole portion on the mold side is the most important factor in ensuring the quality of the runnerless molding system. As an important point, it is not an exaggeration to say that such a fitting state determines the quality of the molded product itself. However, in the current system based on the conventional mechanism of this kind, there is no way to objectively check the instantaneous action for each shot, and the entire molding cycle is not performed. Other than relying on sensory testing (ie, visual inspection) of each finished product (ie, molded product), there is still a major problem in the situation where no method has been found so far. It can be called an issue. As described above, it can be said that the conventional multi-cavity runnerless molding apparatus with a built-in needle valve still has many difficult problems and problems.
【０００３】[0003]
【発明が解決しようとする課題】扨、在来此の種、ニー
ドルバルブ内蔵型多数個取りランナーレス成型装置に在
っては、前述せるが如き数多くの問題点が潜んでいるの
で在った。本発明は、斯かる点に鑑み成されたものにし
て、本発明が解決しようとする課題としては、ニードル
バルブ内蔵型多数個取りランナーレス成型装置の原点に
立って考察した時、解明しようとする為のヒントが閃い
たものである。 即ち、本発明は、斯かる「ニードル
バルブ内蔵型多数個取りランナーレス成型装置」に在っ
ては、前項Heretofore, this type of multi-cavity runner-less molding apparatus with a built-in needle valve has a number of problems as described above. . The present invention has been made in view of the above points, and as a problem to be solved by the present invention, when considering from the origin of a multi-cavity runnerless molding device with a built-in needle valve, it is sought to elucidate. The hint to do is flashing. That is, the present invention relates to such a “multi-cavity runnerless molding device with a built-in needle valve”,
【０００２】[0002]
【従来の技術】に於て、縷縷、詳述せる如く、射出時
（即ち、ニードルバルブ後退時）に対する休止時（即
ち、ニードルバルブ前進時）に於ける、金型ランナー内
溶融樹脂容積に余りにも大差が生じていると云った厳然
たる事実が存在している点、換言すれば、溶融樹脂容積
と云うものは、もともと差が生ずるのが当たり前なんだ
と云った如き、観念をば一掃し斯かる差が存在する限
り、此の種問題解決は絶対に有り得ないのだ。然らば、
如何なる状態に在っても、溶融樹脂容積に関しては差が
絶対生じない様な構造メカを採り入れない限り、此の種
の問題解決には繋がらないと云う発想に立ち、基本的な
構造メカの改善を成さんとするものである。然うして、
其の基本的構造メカとしては、金型内のメインランナー
内に、適当径のカムスピンドルを軸支せしめる一方、ニ
ードルバルブの頭部と該カムスピンドルとを機構的に結
合せしめ、且つ、該、カムスピンドルの一端部に駆動部
を設置せしめ之に回動運動を付与せしめた構成に依り、
幾多の難問題や課題等は総て完璧にクリアー成し得るに
至ったものである。2. Description of the Related Art In the prior art, as will be described in detail, the volume of molten resin in a mold runner during injection (i.e., when the needle valve is retracted) and at rest (i.e., when the needle valve is advanced) is too large. However, there is a strict fact that there is a great difference between them, in other words, the molten resin volume has to be wiped out of the idea, as it was natural that the difference originally occurred. As long as there is such a difference, there is absolutely no solution to this kind of problem. If so,
Regardless of the state, the concept of solving this kind of problem will not lead to the solution of this kind of problem unless the adoption of a structural mechanism that does not cause a difference in the volume of the molten resin. It is assumed to be Nari. But,
As its basic structural mechanism, a cam spindle having an appropriate diameter is supported in a main runner in a mold, while a head of a needle valve and the cam spindle are mechanically connected to each other. According to the configuration in which the drive unit is installed at one end of the cam spindle, and the rotary motion is given to the drive unit,
Many difficult problems and tasks have been completely cleared.
【０００４】[0004]
【課題を解決するための手段】本発明は、前項に詳述し
た見地より、理論的には云うまでも無く最も合理的にし
て然も、根本的に解決せんとするものであって、此処に
於て、完璧なる「ニードルバルブ内蔵型多数個取りラン
ナーレス成型装置」が成立する為には、現状に於ける如
何なる荷題点をクリアーしなければならないか、と云っ
た基本からスタートし、その答えに依って課題解決の手
段をピックアップする事とした。 ．即ち、如何なる状態に在ろうとも、ランナーレス成
型装置に於ける金型ランナー内「溶融樹脂容積」に関し
ては、絶対に差が生じない様な、構造メカを採り入れる
と云う基本理念に立ち、在来公知のニードルバルブ構造
メカに在っては、其の本体中央部より頭部に掛かる部分
が（之は、ニードルバルブ本体の上半分を指してい
る）、ランナーを貫通しマニホールド金型装置の外部に
迄、ハミ出していた構造其のものに着目し、そもそも、
斯かる構造メカを採用している事自体が、射出時並びに
休止時に於にける「溶融樹脂容積」に関し、大差を齎す
根本的な原因で有ったとの見解に立ち、其處で本発明に
於ては、マニホールド金型装置のメインランナー内に、
適当径のカムスピンドルを軸支せしめる（社の実験に基
づけば、メインランナー直径 φ＝１２ｍｍに対し、カ
ムスピンドル直径 φ＝６ｍｍ程度なり）構造メカに置
き換えるものとする。 ．然うして、該、カムスピンドルと、ランナー内に嵌
挿されているニードルバルブ頭部との直交交叉相当位置
に於て、構造メカ的に遊挿係止成さしめる。 ．そして更に、前記、カムスピンドルの一端部をマニ
ホールド金型装置の端面に迄延長せしめ、当該、カムス
ピンドル廷長部に駆動源を連結せしめ、以って、該、カ
ムスピンドルに回動運動を付与せしめるものとする。 ．尚、該、カムスピンドルへの伝導用エレメントとし
ては、ギアー・ピニオン式、或いは亦、梃子の原理を利
用したレバーメカ、…等を採用するものとし、駆動源は
射出成型機械の作動タイミングに連動させるものとす
る。 以上、詳述せる項〜項迄に依り、ニードルバルブ内
蔵型多数個取りランナーレス成型装置に関わる諸々の難
問題が凡て一挙に、解決成し得る事が明白となった次第
である。然うして、項〜項に斯かる具体的な手段と
は、凡そ次の如くである。トツププレート（Ｔ）、マニ
ホールド本体（Ｍ）並びにキャビティプレート（Ｃ）等
を組み合わせ一体化せしめる一方、多数個取りの金型取
り数に対応して固着せる、夫々のノズルチップ（Ｎ．
Ｃ）に関し、往復衝程運動に依り開閉自在なる様、夫
々、ニードルバルブ（Ｎ．Ｖ）を嵌挿せしめて構成せ
る、ニードルバルブ内蔵型多数個取りランナーレス成型
装置（Ｍ．Ｒ．Ａ）に於て、前記せるマニホールド本体
（Ｍ）の略、中央部に在り且つ水平方向に穿孔せる、メ
インランナー（Ｍ．Ｒ）の中心線に沿い、適当径のカム
スピンドル（Ｃ．Ｓ）を挿通させて軸支せしめると共
に、前記、多数個取り取り数に対応して固着せし、夫々
のノズルチップ（Ｎ．Ｃ）に嵌挿せる、ニードルバルブ
（Ｎ．Ｖ）の頭部（Ｈ）に鍔（Ｆ）を形設せしめる一
方，該、鍔（Ｆ）と前述のカムスピンドル（Ｃ．Ｓ）と
の直交交叉相当位置に於て、該、鍔（Ｆ）の大きさに対
応せる適当形態の凹陥部（Ｄ）を穿設し、以って、前
記、ニードルバルブ（Ｎ．Ｖ）頭部（Ｈ）の鍔（Ｆ）
を、該、カムスピンドル（Ｃ．Ｓ）の凹陥部（Ｄ）に対
し、ワンタッチにて遊挿係止成し得る構造に依り、該、
カムスピンドル（Ｃ．Ｓ）の一端部に設置の駆動源
（Ｅ）よりの、回動動作に伴うニードルバルブ（Ｎ．
Ｖ）の往復衝程運動を呈する結果、夫々のノズルチップ
（Ｎ．Ｃ）のゲートホール（Ｇ．Ｈ）の開閉が自在なる
様構成した事を特徴とせる、カムスピンドル・アクショ
ン式ニードルバルブ内蔵型多数個取りランナーレス成型
装置にして、既に、詳述せる如き数多くの難問題は総べ
て一挙にクリアーするに至ったもので、然も、其の構成
が簡易其のものである争からして、構成部品点数僅少且
つ製作容易、従って、価格は低廉安価、然も、既設在来
公知の射出成型機への装着使用可能なる事、…等々よ
り、其の実用的効果の程は測り知れない位甚大なるもの
がある。SUMMARY OF THE INVENTION The present invention, from the point of view described in detail in the preceding section, aims to solve the problem fundamentally, not to mention theoretically, but to the most reasonable. In order to establish a perfect `` multi-cavity runnerless molding device with a built-in needle valve '', we must start from the basics of what kind of issues must be cleared in the current situation, We decided to pick up a solution to the problem based on the answer. . In other words, regardless of the state, the "melt resin volume" in the mold runner in the runnerless molding machine is based on the basic philosophy of adopting a structural mechanism that does not cause any difference, In a well-known needle valve structure mechanism, a portion that extends from the central portion of the main body to the head (this refers to the upper half of the needle valve main body) penetrates the runner and extends outside the manifold mold apparatus. Until then, paying attention to the structure itself that had been exposed, in the first place,
Based on the view that the employment of such a structural mechanism was itself a fundamental cause of a great difference in the “molten resin volume” during injection and at rest, the present invention was applied thereto. In the main runner of the manifold mold device,
A cam spindle having an appropriate diameter is supported by a shaft (based on the company's experiment, the cam spindle diameter is about 6 mm for the main runner diameter of 12 mm). . Therefore, at the position corresponding to the orthogonal crossing between the cam spindle and the head of the needle valve inserted into the runner, the loose insertion is locked mechanically and mechanically. . Further, one end of the cam spindle is extended to the end face of the manifold mold apparatus, and a drive source is connected to the cam spindle, thereby imparting a rotational movement to the cam spindle. Shall be confused. . As the transmission element to the cam spindle, a gear and pinion type, or a lever mechanism using the principle of leverage, etc. is adopted, and the drive source is linked to the operation timing of the injection molding machine. Shall be. As described above, it has become clear that various difficulties relating to the multi-cavity runnerless molding apparatus with a built-in needle valve can be solved at once at a glance. Therefore, the specific means of the above items are as follows. While combining the top plate (T), the manifold body (M), the cavity plate (C), etc., and integrating them, the respective nozzle tips (N.
Regarding C), in a multi-cavity runnerless molding device (MRA) with a built-in needle valve, each of which is configured by inserting and inserting a needle valve (N.V.) so that it can be opened and closed by a reciprocating stroke movement. A cam spindle (CS) having an appropriate diameter is inserted along the center line of the main runner (MR), which is located substantially at the center of the manifold body (M) to be pierced and is pierced in the horizontal direction. A flange (F) is attached to the head (H) of the needle valve (NV), which is attached to the nozzle tip (NC) while being pivotally supported and fixed in accordance with the number of pieces to be taken. ) Is formed, and at a position corresponding to the orthogonal crossing between the flange (F) and the cam spindle (CS), an appropriately shaped concave portion corresponding to the size of the flange (F) is formed. (D), and the needle valve (N.V. Brim of the head (H) (F)
Is formed in the recess (D) of the cam spindle (CS) by a one-touch operation.
A needle valve (N.D.) associated with a rotation operation from a driving source (E) installed at one end of the cam spindle (C.S.).
V) Reciprocating stroke movement, so that the gate hole (GH) of each nozzle tip (NC) can be opened and closed freely, with built-in cam spindle action type needle valve With a multi-cavity runnerless molding device, many difficult problems as detailed here have already been all cleared at once, and of course, because of the dispute that its configuration is simple itself. The number of component parts is small and easy to manufacture. Therefore, the price is low and inexpensive, but it can be used on existing and well-known injection molding machines. There are huge things.
【０００５】[0005]
【作用】本発明に斯かる、「カムスピンドル・アクショ
ン式ニードルバルブ内蔵型多数個取りランナーレス成型
装置」は、前項The multi-cavity runnerless molding device with a built-in cam spindle / action needle valve according to the present invention is described in the preceding item.
【０００４】[0004]
【課題を解決するための手段】にて詳述せる如き構成に
依り成るものであるから、ニードルバルブ内蔵型多数個
取りランナーレス成型装置（Ｍ．Ｒ．Ａ）に於て、射出
成型機シリンダー（図は省略す）より、一定のタクトタ
イム毎に射出される流動性の溶融樹脂（Ｒ）は、先ずマ
ニホールド本体（Ｍ）の略、中央部に在って且つ、水平
方向に穿孔されたメインランナー（Ｍ．Ｒ）内に流動充
満するが、その際、例えば実施例図２（本図は図１中の
ア部拡大詳細図なり）に示した場合に在っては、該、メ
インランナー内に挿通され軸支せるカムスピンドル
（Ｃ．Ｓ）が、其の一端部に設置された駆動源（Ｅ）の
回動運動に依って、該、カムスピンドル（Ｃ．Ｓ）の凹
陥部（Ｄ）に遊挿係止せしめられた、ニードルバルブ
（Ｎ．Ｖ）其のものを、最上点（Ｕ）迄、上昇せしめる
結果、夫々のノズルチップ（Ｎ．Ｃ）のゲートホール
（Ｇ．Ｈ）を開放する事となり、此處に於て、夫々の金
型キャビティに対し、高圧状態の溶融樹脂（Ｒ）を射出
充填するに至るもので、此のインターバルが即ち、射出
時（ニードルバルブ上昇後退時）に相当するものなので
ある。斯くて、予め設定された一定のタイミングが経過
するや、再び、射出成型機（図は省略す）に連動された
駆動源（Ｅ）からの回動運動に依り、今迄、最上点
（Ｕ）に位置せるニードルバルブ（Ｎ．Ｖ）は、カムス
ピンドル（Ｃ．Ｓ）の回動運動に依って、実施例図３
（Ａ）にて明かな如く、ニードルバルブ（Ｎ．Ｖ）の頭
部（Ｈ）が回動押圧されるに従い、図中下降しつつ終に
は、ニードルバルブ（Ｎ．Ｖ）先端部にて、夫々のノズ
ルチップ（Ｎ．Ｃ）のゲートホール（Ｇ．Ｈ）を閉止せ
しめるに至るもので、此のインターバルが即ち、休止時
（ニードルバルブ下降前進時）に相当するものなのであ
る。In the multi-cavity runnerless molding device (MRA) with a built-in needle valve, the cylinder is formed by an injection molding machine cylinder. Therefore, the flowable molten resin (R) injected at a constant tact time is located substantially in the center of the manifold body (M) and is perforated in the horizontal direction. The main runner (MR) is filled with fluid. At this time, for example, in the case shown in FIG. 2 of the embodiment (this figure is an enlarged detailed view of a part in FIG. 1), the main The cam spindle (CS) inserted into the runner and supported by the shaft is rotated by a driving source (E) installed at one end of the cam spindle (CS). (D) The needle valve (N.V.) As a result of raising to the upper point (U), the gate holes (GH) of the respective nozzle tips (NC) are opened, and the respective mold cavities are in a high pressure state. This interval corresponds to the injection time (when the needle valve rises and retreats). Thus, when a predetermined timing that has been set in advance elapses, the uppermost point (U) is determined again by the rotational movement from the drive source (E) linked to the injection molding machine (not shown). The needle valve (N.V.) located at the position (3) according to the embodiment shown in FIG.
As clearly shown in FIG. 7A, as the head (H) of the needle valve (N.V.) is rotationally pressed, the needle valve (N.V.) descends and ends at the tip of the needle valve (N.V.). This interval leads to closing the gate hole (GH) of each nozzle tip (NC), and this interval corresponds to a pause (when the needle valve descends and advances).
【０００６】[0006]
【実施例】本発明の実施例に関し、図１、図２及び図
３、について説明する。先ず、本実施例図１に於ては、
トッププレート（Ｔ），マニホールド本体（Ｍ）並びに
キャビティプレート（Ｃ）等を組み合わせ一体化せしめ
て構成せる、ニードルバルブ内蔵型多数個取りランナー
レス成型装置（Ｍ．Ｒ．Ａ）に於て、多数個取り金型取
り数に対応して固着せるノズルチップ（Ｎ．Ｃ）２個を
配設固着せる場合（即ち、２個取りの場合）の要部を表
わした一部省略一部切欠の断面正面図を示したものであ
る。然うして、同図２は、図１中のア部拡大詳細図を表
わし、更に、同図３（Ａ）及び（Ｂ）は、同図２中のイ
−イ矢視断面拡大図を夫々表わしており、（Ａ）はニー
ドルバルブ（Ｎ．Ｖ）の下降過程を示したもの、（Ｂ）
はニードルバルブ（Ｎ．Ｖ）の上昇過程を夫々表わした
ものである。扨て、本発明は前項DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to FIGS. First, in FIG. 1 of the present embodiment,
In the multi-cavity runnerless molding device (MRA) with a built-in needle valve, which is configured by combining and integrating the top plate (T), the manifold body (M) and the cavity plate (C), etc. Partially omitted, partially cut-away cross-section showing the main part when two nozzle tips (NC) to be fixed in accordance with the number of individual die are arranged and fixed (that is, in the case of two). FIG. FIG. 2 is a detailed enlarged view of the portion A in FIG. 1, and FIGS. 3A and 3B are enlarged sectional views taken along the line II in FIG. (A) shows the descending process of the needle valve (N.V.), (B)
Represents the rising process of the needle valve (N.V). Now, the present invention provides
【０００５】[0005]
【作用】に於て、縷縷、詳述せる如く作用成し得るか
ら、射出成型機シリンダー（図は省略す）より、一定の
タクトタイム毎に射出される流動性の溶融樹脂（Ｒ）
は、マニホールド本体（Ｍ）内に穿孔されたメインラン
ナー（Ｍ．Ｒ）を流動するが、先ず、射出時に在って
は、射出成型機と連動している駆動源（Ｅ）の回動運動
に依る、カムスピンドル（Ｃ．Ｓ）を介し、ニードルバ
ルブ（Ｎ．Ｖ）を上昇せしめ最上点（Ｕ）に迄到達する
結果、夫々のノズルチップ（Ｎ．Ｃ）のゲートホール
（Ｇ．Ｈ）を開放する争となり、高圧状態の溶融樹脂
（Ｒ）を金型キャビティ （Ｋ．Ｃ）へ射出充填するに
至るもので、此のインターバルが、即ち、射出時（ニー
ドルバルブ上昇後退時）なり。然うして、予め設定され
た一定のタイミングが経過するや、再び、射出成型機に
連動された駆動源（Ｅ）からの回動運動に依り、最上点
（Ｕ）に位置せるニードルバルブ（Ｎ．Ｖ）は、カムス
ピンドル（Ｃ．Ｓ）の回動運動にて、実施例面３（Ａ）
に示す如く、ニードルバルブ（Ｎ．Ｖ）頭部（Ｈ）が回
動押圧されるに従い、図中下降しつつ終に、ニードルバ
ルブ（Ｎ．Ｖ）先端部にて、夫々のノズルチップ（Ｎ．
Ｃ）のゲートホール（Ｇ．Ｈ）を閉止せしめるに至るも
ので、此のインターバルが、即ち、休止時（ニードルバ
ルブ下降前進時）となる。以下、斯かる如き一連のサイ
クル動作を繰り返す事に依り、射出成型作業が続行され
成型製品が次々と生産されるに至る。In the function, the fluidized resin (R) is injected from the cylinder (not shown) of the injection molding machine at a constant tact time because it can function as described in detail.
Flows through the main runner (M.R.) perforated in the manifold body (M). First, at the time of injection, the rotational movement of the drive source (E) interlocked with the injection molding machine. As a result of raising the needle valve (N.V.) through the cam spindle (C.S.) and reaching the uppermost point (U), the gate hole (G.H.) of each nozzle tip (N.C.) ), Which leads to injection filling of the high-pressure molten resin (R) into the mold cavity (K.C). This interval, ie, at the time of injection (when the needle valve rises and retracts) . Thus, after a predetermined timing elapses, the needle valve (N) positioned at the uppermost point (U) is again turned by the rotational movement from the drive source (E) linked to the injection molding machine. .V) is caused by the rotational movement of the cam spindle (CS), and the surface of the embodiment 3 (A)
As shown in FIG. 5, as the head (H) of the needle valve (N.V.) is rotated and pressed, the nozzle tip (N.V.) ends at the tip of the needle valve (N.V.) while descending in the figure. .
This interval leads to the closing of the gate hole (GH) of C), and this interval is at rest (when the needle valve descends and advances). Hereinafter, by repeating such a series of cycle operations, the injection molding operation is continued, and molded products are produced one after another.
【０００７】[0007]
【発明の効果】叙上せる如く、本発明に依れば凡そ次の
如き実用的効果を奏するものである。先ず、本発明装置
の特徴効果に関し、在来公知の構成に対する本発明装置
との基本的な相違点を比較対比すれば、次の通りであ
る。即ち、在来公知品に在っては、射出時並びに休止時
に於て、メインランナー内溶融樹脂容積に大差が存在し
ていたが、本発明に於ては、其の差全くゼロなり。従っ
て、次に述べる如き諸々の特徴・効果を奏するに至る。 ．作動用メカニズムが極めて簡易なり。 ．作動用メカニズムが流体中（溶融樹脂中）に１００
％浸漬された状態に在る事から、諸々の力学的影響を受
けないので、作動がスムーズとなる。 ．メカが簡易なる事から、構成部品点数も僅少に留ま
り、製作容易。 ．依って、価格は低廉安価其のものにして量産向き。 ．然も、既設在来公知の金型装置へも装着使用可能な
り。…等々。 以上、縷縷、本発明装置に就いて記述して来たが、換言
すれば本発明装置は、「ニードルバルブ内蔵型多数個取
りランナーレス成型装置」に関し、理論的見地（即ち、
本発明装置に最も関連のある原理・法則としては、パス
カルの原理及びアルキメデスの原理が挙げられる）から
しても、最も合理的にして且つ、斬新なる発想の提案に
して、其の実用的効果の程は甚大、此の種、産業界への
貢献度は測り知れぬもの有り。As described above, according to the present invention, the following practical effects can be obtained. First, regarding the characteristic effects of the device of the present invention, the basic differences between the device of the present invention and a conventionally known configuration are compared and compared as follows. That is, in the conventional known products, there was a large difference in the volume of the molten resin in the main runner at the time of injection and at rest, but in the present invention, the difference is completely zero. Therefore, various characteristics and effects as described below are achieved. . The operation mechanism is extremely simple. . The operating mechanism is 100 in the fluid (in the molten resin).
Since it is in the state of being immersed in%, it is not affected by various mechanical effects, so that the operation becomes smooth. . Since the mechanism is simple, the number of components is very small, making it easy to manufacture. . Therefore, the price is low and cheap, and it is suitable for mass production. . Needless to say, it can be mounted and used on existing and known mold devices. …And so on. As described above, the present invention has been described with respect to the reticle. In other words, the present invention relates to a "multi-cavity runnerless molding apparatus with a built-in needle valve" in a theoretical viewpoint (that is, a molding method).
The principles and laws most relevant to the device of the present invention include the principle of Pascal and the principle of Archimedes). The degree of contribution to the industry is immeasurable.
【図１】本発明に斯かる一実施例を示すが、本図に在っ
ては、カムスピンドル・アクション式ニードルバルブ内
蔵型多数個取りランナーレス成型装置に於いて、ノズル
チップ（Ｎ．Ｃ）２個を配設固着せる場合（即ち、２個
取りの場合）の要部を表わした一部省略一部切欠の断面
正面図を示したものである。FIG. 1 shows one embodiment of the present invention. FIG. 1 shows a multi-cavity runnerless molding apparatus with a built-in cam spindle / action needle valve and a nozzle tip (NC). FIG. 3 is a partially cutaway front view showing a main part when two pieces are arranged and fixed (that is, when two pieces are fixed).
【図２】本発明実施例図１中に於にける、拡大詳細図を
示している。FIG. 2 is an enlarged detailed view of the embodiment of the present invention shown in FIG. 1;
【図３】本発明実施例図２中に於ける、イ−イ矢視断面
拡大図を表わしており、（Ａ）はニードルバルブ（Ｎ．
Ｖ）の下降過程を示したもの、（Ｂ）は同ニードルバル
ブ（Ｎ．Ｖ）の上昇過程を夫々示したものである。FIG. 3 is an enlarged cross-sectional view taken along the line II in FIG. 2 of the embodiment of the present invention, wherein (A) shows a needle valve (N.
V) shows a descending process, and (B) shows an ascending process of the needle valve (NV).
Ｃ キャビティプレート Ｃ．Ｓ カムスピンドル Ｄ 凹陥部 Ｅ 駆動源 Ｆ 鍔 Ｇ．Ｈ ゲートホール Ｈ 頭部 Ｋ．Ｃ 金型キャビティ Ｍ マニホールド本体 Ｍ．Ｒ メインランナー Ｍ．Ｒ．Ａニードルバルブ内蔵型多数個取りランナーレ
ス成型装置 Ｎ．Ｃ ノズルチップ Ｎ．Ｖ ニードルバルブ Ｒ 溶融樹脂 Ｔ トッププレート Ｕ 最上点C cavity plate S cam spindle D concave part E drive source F flange G. H Gate hole H Head K. C Mold cavity M Manifold body R Main runner M. R. A. Multi-cavity runnerless molding machine with built-in needle valve. C Nozzle tip N. V Needle valve R Molten resin T Top plate U Top point
Claims (1)
体（Ｍ）並びにキャビティプレート（Ｃ）等を組み合わ
せ一体化せしめる一方、多数個取りの金型取り数に対応
して固着せる、夫々のノズルチップ（Ｎ．Ｃ）に関し、
往復衝程運動に依り開閉自在成る様、夫々、ニードルバ
ルブ（Ｎ．Ｖ）を嵌挿せしめて構成せる、ニードルバル
ブ内蔵型多数個取りランナーレス成型装置（Ｍ．Ｒ．
Ａ）に於て、前記せるマニホールド本体（Ｍ）の略、中
央部に在り且つ水平方向に穿孔せる、メインランナー
（Ｍ．Ｒ）の中心線に沿い且つ、一端部に駆動源（Ｅ）
を設置せる、適当径のカムスピンドル（Ｃ．Ｓ）を挿通
させて軸支せしめると共に、前記、多数個取り取り数に
対応して固着せし、夫々のノズルチップ（Ｎ．Ｃ）に嵌
挿せる、ニードルバルブ（Ｎ．Ｖ）の頭部（Ｈ）に鍔
（Ｆ）を形設せしめる一方、該、鍔（Ｆ）と前述のカム
スピンドル（Ｃ．Ｓ）との直交交叉相当位置に於て、
該、鍔（Ｆ）の大きさに対応せる適当形態の凹陥部
（Ｄ）を穿設し、以って、前記、ニードルバルブ（Ｎ．
Ｖ）頭部（Ｈ）の鍔（Ｆ）を、該、カムスピンドル
（Ｃ．Ｓ）の凹陥部（Ｄ）に対し，ワンタッチにて遊挿
係止成し得る構造に依り、該、カムスピンドル（Ｃ．
Ｓ）の回動動作に伴うニードルバルブ（Ｎ．Ｖ）の往復
衝程運動に基づく、夫々のノズルチップ（Ｎ．Ｃ）のゲ
ートホール（Ｇ．Ｈ）の開閉が自在成る様構成した事を
特徴とせる、カムスピンドル・アクション式ニードルバ
ルブ内蔵型多数個取りランナーレス成型装置。1. A nozzle plate (1) that combines and integrates a top plate (T), a manifold body (M), a cavity plate (C), etc., while fixing them in accordance with the number of multi-cavity molds. NC)
A needle valve built-in multi-cavity runnerless molding apparatus (M.R.R.), which is configured by inserting and fitting a needle valve (N.V.) so that it can be opened and closed by a reciprocating stroke movement.
In (A), a drive source (E) is provided along the center line of the main runner (MR), which is located substantially in the center of the manifold body (M) to be pierced in the horizontal direction and is provided at one end.
The cam spindle (CS) having an appropriate diameter is inserted and supported by the shaft, and the cam spindle (CS) is fixed in accordance with the number of pieces to be picked up and fitted into each nozzle tip (NC). A flange (F) is formed on the head (H) of the needle valve (N.V), and at the position corresponding to the orthogonal crossing between the flange (F) and the cam spindle (CS). ,
A concave portion (D) of an appropriate shape corresponding to the size of the flange (F) is formed, and accordingly, the needle valve (N.
V) The flange (F) of the head (H) can be freely inserted and locked with the recess (D) of the cam spindle (CS) by one-touch operation. (C.
The gate hole (GH) of each nozzle tip (NC) can be freely opened and closed based on the reciprocating stroke movement of the needle valve (NV) accompanying the turning operation of S). Multi-cavity runnerless molding device with built-in cam spindle and action type needle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8075096A JP2761865B2 (en) | 1996-02-21 | 1996-02-21 | Multi-cavity runnerless molding device with built-in cam spindle and action type needle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8075096A JP2761865B2 (en) | 1996-02-21 | 1996-02-21 | Multi-cavity runnerless molding device with built-in cam spindle and action type needle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09225965A JPH09225965A (en) | 1997-09-02 |
| JP2761865B2 true JP2761865B2 (en) | 1998-06-04 |
Family
ID=13566304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8075096A Expired - Lifetime JP2761865B2 (en) | 1996-02-21 | 1996-02-21 | Multi-cavity runnerless molding device with built-in cam spindle and action type needle valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2761865B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6086357A (en) * | 1998-12-21 | 2000-07-11 | D-M-E Company | Actuator for an injection molding valve gate |
| DE202006000036U1 (en) * | 2006-01-02 | 2007-05-16 | Günther Heisskanaltechnik Gmbh | Actuation device for sealing needles in injection molding with needle valve nozzles |
-
1996
- 1996-02-21 JP JP8075096A patent/JP2761865B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09225965A (en) | 1997-09-02 |
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