JPS62104722A - Ejector-actuating device of injection molder - Google Patents
Ejector-actuating device of injection molderInfo
- Publication number
- JPS62104722A JPS62104722A JP24516485A JP24516485A JPS62104722A JP S62104722 A JPS62104722 A JP S62104722A JP 24516485 A JP24516485 A JP 24516485A JP 24516485 A JP24516485 A JP 24516485A JP S62104722 A JPS62104722 A JP S62104722A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- cylinder
- ejector
- stage
- space
- 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
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
- B29C45/76—Measuring, controlling or regulating
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/82—Hydraulic or pneumatic circuits
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)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、製品突き出し用としての射出成形機のエジェ
クタシリンダに、ゲートカットおよびベントシールの機
能を付加できるようにした射出成形機のエジェクタ作動
装置に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention provides an ejector operation system for an injection molding machine in which gate cut and vent seal functions can be added to the ejector cylinder of an injection molding machine for ejecting a product. Regarding equipment.
（従来の技術）
従来、熱可塑性および熱硬化性樹脂を用いて射出成形す
る場合、成形品はランナー・スプールと一体になって取
シ出され、後処理として成形品のゲート部及びベント孔
部を切断して仕上げるのが一般的であった。(Prior art) Conventionally, when injection molding is performed using thermoplastic and thermosetting resins, the molded product is taken out together with the runner spool, and the gate and vent holes of the molded product are removed as a post-process. It was common to finish by cutting.
しかし、最近では全屋内にゲートカット、ベントシール
機構を組み込むことによシ、成形中に上記工程を終了し
て後処理工程を減らし、また成形サイクルの短縮をも図
る成形方法が用いられている。However, recently, a molding method has been used that incorporates a gate cut and vent seal mechanism inside the entire mold, thereby completing the above steps during molding, reducing post-processing steps, and also shortening the molding cycle. .
一方、これら機能を全型側に設けるのではなく、エジェ
クタシリンダ以外にゲートカットおよびベントシール用
シリンダを射出成形機の型締機構部側に装備したものも
ある。On the other hand, instead of providing these functions on the entire mold side, some injection molding machines are equipped with a gate cut and vent seal cylinder in addition to the ejector cylinder on the mold clamping mechanism side of the injection molding machine.
（発明が解決しようとする問題点）
しかしながら、上記３機能を一般に射出成形機のエジェ
クタシリンダのみを作動させて行なう場合、金型側に複
雑なスライドコアや特別のシリンダ装置等を個々の金型
に設けなければならず、金型の精度維持の困難性および
コスト上昇を伴なうという問題点があった。(Problems to be Solved by the Invention) However, when the above three functions are generally performed by operating only the ejector cylinder of an injection molding machine, a complicated slide core or special cylinder device is installed on the mold side. This poses a problem in that it is difficult to maintain the precision of the mold and increases costs.
また、射出成形機側にエジェクタシリンダの設置位置を
中心にして左右および上下にそれぞれゲートカット、ベ
ントシール用シリンダを２本づつ設けてそれぞれの機能
を分担させ、簡単な金型構造によって成形を行なうこと
も可能であるが、この場合には、エジェクタシリンダの
他に４本のシリンダが必要となシ、成形機側の装備が複
雑でメンテナンスの維持が難しく、シかも成形機のコス
トを上昇させることになυかねない。In addition, on the injection molding machine side, two cylinders for gate cutting and vent sealing are installed on the left and right sides and upper and lower sides of the ejector cylinder installation position, and each function is shared, and molding is performed using a simple mold structure. However, in this case, four cylinders in addition to the ejector cylinder are required, and the equipment on the molding machine side is complicated, making maintenance difficult, which may also increase the cost of the molding machine. It could be a big deal.
それ故、成形機の型締機構側の中心部に設けたエジェク
タシリンダの左右又は上下に各１本づつゲートカット、
ベントシール用シリンダを設けることになるが、これで
は各シリンダが中心からずれた位置で個々にシリンダを
作動させるため片荷重となシ摺動部分にコジレが発生す
るという問題点もあった。Therefore, one gate is cut on the left and right or top and bottom of the ejector cylinder installed in the center of the mold clamping mechanism side of the molding machine.
Although a cylinder for vent sealing is provided, there is a problem in that since each cylinder is operated individually at a position offset from the center, twisting occurs in the sliding part due to one-sided load.
このような問題点を解消するために、本発明の目的は製
品突き出し用のエジェクタシリンダを３段構造として、
ぺ／トシール、ゲートカントおよび製品突き出しのそれ
ぞれの機能を１つのシリンダによシ行なうようにした作
動油圧回路を備えた射出成形機のエジェクタ作動装置を
提供することにある。In order to solve such problems, the object of the present invention is to provide an ejector cylinder for ejecting products with a three-stage structure,
An object of the present invention is to provide an ejector actuating device for an injection molding machine equipped with an actuating hydraulic circuit in which each of the functions of pet/toe seal, gate cant, and product ejection are performed by one cylinder.
（問題点を解決するための手段）
上記目的全達成するため、本発明のエジェクタ作動装置
は後段ピストンの前進動とともに前段ピストンを押圧す
るように連接された複数段のピストン構成からなるエジ
ェクタシリンダと各ピストン金所定の手順に従って作動
する作動制御回路を設け、
各ピストンを配設したそれぞれのシリンダ部は、各段ご
とに順次その径を縮少するとともに各ピストンに画成さ
れる前方空間部と後方空間部を形成し、かつ連接するシ
リンダ部間で後段の前方空間部と前段の後方空間部を連
通させ、しかも各シリンダの後方空間部および最前段の
前方空間部には作動媒体を流出入させるそれぞれのポー
ト口を形成し、各ピストンを独立に作動させる前記作動
制御回路の切換弁を各シリンダ部に対応させてそれぞれ
の前記ポートロに接続して設けたことを特徴としている
。(Means for Solving the Problems) In order to achieve all of the above objects, the ejector actuating device of the present invention includes an ejector cylinder consisting of a plurality of pistons connected so as to press the front piston with the forward movement of the rear piston. Each piston is provided with an operation control circuit that operates according to a predetermined procedure, and the diameter of each cylinder portion in which each piston is arranged is gradually reduced in each stage, and the front space defined by each piston is A rear space is formed, and the rear stage front space and the front stage rear space are communicated between the connected cylinder parts, and the working medium is allowed to flow in and out of the rear space of each cylinder and the front space of the front stage. The present invention is characterized in that a switching valve of the operation control circuit for independently operating each piston is provided in correspondence with each cylinder portion and connected to each port.
（作 用）
このような構成としたことにより、エジェクタシリンダ
の後段ピストンがそのシリンダ部に対応した切換弁よシ
作動媒体全その後方空間部に流入してピストンを押圧す
るとともに、前方空間部に存在する作動媒体を押出して
前段シリンダ部の後方空間部内に流入して順次前段ピス
トンを後段ピストンと一体に移動させ最前段のピストン
が所定量前進する。(Function) With this configuration, the rear piston of the ejector cylinder flows into the rear space through the switching valve corresponding to the cylinder part, and all of the working medium flows into the rear space to press the piston, and at the same time, the working medium flows into the front space. The existing working medium is pushed out and flows into the rear space of the front-stage cylinder section, and the front-stage pistons are sequentially moved together with the rear-stage pistons, so that the front-most piston moves forward by a predetermined amount.
次に、最後段ピストン手前の前段ピストンでは、このシ
リンダ部に対応した切換弁からの作動媒体をその後方空
間部に供給して上記前段ピストンを押圧し、順次その前
段ピストン全前進させるとともに、最後段シリンダ部の
前方空間部に作動媒体全流入させて後段ピストンを元の
位置に戻す。Next, in the front stage piston before the last stage piston, the working medium from the switching valve corresponding to this cylinder section is supplied to the rear space thereof to press the front stage piston, and sequentially move the front stage piston fully forward, and the last stage piston All of the working medium is allowed to flow into the front space of the stage cylinder section, and the rear stage piston is returned to its original position.
すなわち、切換弁から作動媒体で押圧された後段ピスト
ンに連接する前段ピストンの各々全一体に連動させて前
進動を行ない、しかも一旦前進した後段ピストンはその
前段ピストンの動作時に切換弁からの作動媒体によって
元の位置に戻されることになる。In other words, each of the front pistons connected to the rear piston, which is pressed by the working medium from the switching valve, moves forward in conjunction with each other, and once the rear piston moves forward, the working medium from the switching valve flows through the operation of the front piston. will be returned to its original position.
しかも最前段のピストンはそのシリンダ部の後方および
前方空間部にポートロが設けられていることによシ、対
応する切換弁の動作により独立して往復動を繰返すこと
ができる。In addition, since the piston at the forefront is provided with portholes in the rear and front spaces of its cylinder portion, it can repeatedly reciprocate independently by operating the corresponding switching valve.
このようにして、一つのエジェクタシリンダｋｍ数個の
ピストンで順次作動させて最前段のピストンを段階的に
前進させ、かつ複数回の往復動作も可能にして、金型内
のベントシール。In this way, several pistons in one ejector cylinder km are operated in sequence to advance the piston in the front stage step by step, and multiple reciprocating operations are also possible, thereby creating a vent seal in the mold.
ゲートカットおよび多段突き出しを行なうことができる
。Gate cutting and multi-step ejection can be performed.
（実施例） 本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described based on the drawings.
第１図において、本発明のエジェクタ作動装置１は複数
のピストン２・・・を直列に配設したエジェクタシリン
ダ３と、このシリンダ３を所定手順に従って作動させる
作動制御回路４とからなっている。In FIG. 1, an ejector actuating device 1 of the present invention comprises an ejector cylinder 3 in which a plurality of pistons 2 are arranged in series, and an actuation control circuit 4 for actuating this cylinder 3 according to a predetermined procedure.
エジェクタシリンダ３は、本実施例では３つのシリンダ
部３ａ、３ｂ、３ＣＩＣ分かれておシ、各シリンダ部に
はピストン２ａ、２ｂ、２ｃ’ｊ）設け、各シリンダ部
とそれに対応するピストンとによシ画成される後方空間
部５ａ、５ｂ、５ｃと前方空間部６ａ、６ｂ、６ｃとが
それぞれのシリンダ部３ａ、３ｂ、３ｃに形成されてい
る。In this embodiment, the ejector cylinder 3 is divided into three cylinder parts 3a, 3b, and 3CIC, and each cylinder part is provided with a piston 2a, 2b, 2c'j), and each cylinder part and its corresponding piston. Rear space portions 5a, 5b, 5c and front space portions 6a, 6b, 6c are formed in each cylinder portion 3a, 3b, 3c.
後方空間部５ａ、５ｂ、５ｃおよび前方空間部６ａ、６
ｂ、６ｃ（こは、それぞれピストン２ ａ 、 ２ ｂ
。Rear space parts 5a, 5b, 5c and front space parts 6a, 6
b, 6c (here, pistons 2 a and 2 b, respectively)
.
２ｃｉ作動させる作動媒体、ここでは所定圧の作動油が
供給される。A working medium for 2ci operation, in this case hydraulic oil at a predetermined pressure, is supplied.
シリンダ部３ａの前方空間部６ａとシリンダ部３ｂの後
方空間部５ｂ間、およびシリンダ部３ｂの前方空間部６
ｂとシリンダ部５Ｃの後方空間部５０間に作動油を連通
させるために、ピストン２ａ、２ｂにはそれぞれ連通路
７，８を形成している。Between the front space 6a of the cylinder part 3a and the rear space 5b of the cylinder part 3b, and the front space 6 of the cylinder part 3b
Communication passages 7 and 8 are formed in the pistons 2a and 2b, respectively, in order to communicate hydraulic oil between the cylinder part 5C and the rear space 50 of the cylinder part 5C.
またシリンダ部３ａ、５ｂ、５ｃの各後方空間部５ａ、
５ｂ、５ｃとシリンダ３Ｃの前方空間部には作動油の流
出入を行なうボートロ９，１０，１１゜１２が設けられ
ている。In addition, each rear space portion 5a of the cylinder portions 3a, 5b, 5c,
5b, 5c and the space in front of the cylinder 3C are provided with boat trolleys 9, 10, 11.degree. 12 through which hydraulic oil flows in and out.
このように構成されたエジェクタシリンダ３は射出成形
機の型締機構部側に組込まれる。The ejector cylinder 3 configured in this manner is assembled into the mold clamping mechanism side of an injection molding machine.
一方、作動制御回路は、ここでは油圧駆動で行なわれる
もので、各シリンダに対応させてそれぞれの電磁切換弁
１３，１４．１５が配設されておシ、各切換弁１！１，
１４．１５に対して一次側の油圧を所定圧に保つための
圧力調整弁１６．１７゜１８′ｇ！：それぞれ取付けて
いる。On the other hand, the operation control circuit here is hydraulically driven, and includes electromagnetic switching valves 13, 14, and 15 corresponding to each cylinder.
14.15, pressure regulating valve 16.17°18'g to keep the primary side oil pressure at a predetermined pressure! :Each is installed.
これらの圧力調整弁１６，１７．１８は作動油全供給す
る油圧源１９に接続されている。These pressure regulating valves 16, 17, and 18 are connected to a hydraulic power source 19 that supplies all of the hydraulic fluid.
また、圧力調整弁１６，１７，１Ｂと油圧源１９間の流
路２０に接続され、油圧源１９からの供給油圧を監視す
るため、リリーフ弁２１と切換弁２２を併用した安全弁
を設けている。In addition, a safety valve is provided which is connected to the flow path 20 between the pressure regulating valves 16, 17, 1B and the hydraulic pressure source 19 and uses a relief valve 21 and a switching valve 22 in order to monitor the hydraulic pressure supplied from the hydraulic pressure source 19. .
これによシ、回路内の圧力が定められた値に達するとボ
／ブの全流量ヲ直接夕／りへもどしてポンプを無負荷に
し動力を節約するとともに、回路圧力を一定にしたシ最
高圧力を規制して装置を採掘する。As a result, when the pressure in the circuit reaches a predetermined value, the entire flow of the tube is returned directly to the pump, leaving the pump unloaded and saving power. Regulate pressure and mine equipment.
次に本装置の動作を第２図の全型構造図と第３図の射出
工程を示すグラフ図に関連して説明する。Next, the operation of this apparatus will be explained with reference to the overall mold structure diagram in FIG. 2 and the graph diagram showing the injection process in FIG. 3.
まず、射出工程が開始されると、切換弁１３のソレノイ
ドＳＱＬ■を作動して弁位置ｉＢ側に切換え、油圧源１
９からの作動油を圧力調整弁１６、切換弁１３を経由し
てポートロ９からシリンダ部３ａの後方空間部５ａに供
給する。First, when the injection process is started, the solenoid SQL■ of the switching valve 13 is activated to switch the valve position iB side, and the hydraulic source 1
9 is supplied from the porthole 9 to the rear space 5a of the cylinder portion 3a via the pressure regulating valve 16 and the switching valve 13.
それ故、ピストン２ａが前進し、前方空間部６ａの作動
油を連通路７から後方空間部５ｂへ流入させ、余分な作
動油は切換弁１４のＡ位置ボートからタンクへ還流させ
る。Therefore, the piston 2a moves forward, causing the hydraulic oil in the front space 6a to flow into the rear space 5b from the communication passage 7, and excess hydraulic oil to flow back from the A position boat of the switching valve 14 to the tank.
また、ピストン２ｂの前段のピストン２ｃも同様にして
、ビス） ｙ ２ ａの前進とともに一体に所定ストロ
ーク前進する。Similarly, the piston 2c preceding the piston 2b moves forward by a predetermined stroke as the screw y2a moves forward.
したがって、この前進動作によシ前段ピストン２Ｃのロ
ッド２５に取付けられた成形機のエジェクタパー２４が
押圧され、さらにエジェクタバー２４にその端部を螺着
した金型のエジェクタビン２５が押圧される。Therefore, this forward movement presses the ejector bar 24 of the molding machine attached to the rod 25 of the front piston 2C, and further presses the ejector pin 25 of the mold whose end is screwed onto the ejector bar 24. .
エジェクタピン２５は、スプリング２６で付勢された金
型内プレート２７ｔ−その付勢力に打ち勝って押圧され
るため、金型内プレート２７に立設したベントシールピ
ン２８およびゲートカット・エジェクタビン２９が前進
する。The ejector pin 25 overcomes the urging force of the mold inner plate 27t biased by the spring 26 and is pressed, so that the vent seal pin 28 and the gate cut ejector bin 29 that are erected on the mold inner plate 27 are pressed. Advance.
この第１段階の前進動では、２つのピン２８゜２９のピ
ン先端部のうち、最先端に位置するベントシール端２８
ａが、ベント溝３０を塞ぐためベントシールされる。こ
の後、射出充填工程を経て射出を完了する。In this first stage of forward movement, the vent seal end 28, which is located at the most tip end of the two pins 28 and 29,
a is vent-sealed to close the vent groove 30. After this, the injection is completed through an injection filling process.
次に、射出完了と同時に切換弁１４のソレノイドＳＱＬ
■が作動して弁位置をＢ側に切換え、切換弁１４の一次
側の作動油が切換弁１４全経てシリンダ部３ｂの後方窓
（ｕｊ部５ｂへボートロ１０から供給される。Next, at the same time as the injection is completed, the solenoid SQL of the switching valve 14 is activated.
(2) is operated to switch the valve position to the B side, and the hydraulic oil on the primary side of the switching valve 14 is supplied from the boat 10 to the rear window (uj section 5b) of the cylinder section 3b through the entire switching valve 14.
後方空間部２ｂに送シ込まれた作動油は連通路７を介し
て前方空間部６ａに流入し、ピストン２ａｉ後退させて
原点位置に戻すとともにビス）／２ｂｉ更に前進させる
。The hydraulic oil sent into the rear space 2b flows into the front space 6a through the communication path 7, and causes the piston 2ai to retreat and return to its original position, while also moving the screw 2bi forward.
このため、前方空間部６ｂの作動油は連通路８を介して
シリンダ部５Ｃの後方空間部５Ｃに流入し、余分の作動
油は切換弁１５の中立位置のボートからタンクへ還流す
る。Therefore, the hydraulic oil in the front space 6b flows into the rear space 5C of the cylinder portion 5C via the communication path 8, and excess hydraulic oil flows back from the boat in the neutral position of the switching valve 15 to the tank.
したがって、ピストン２ｂはピストン２ｃｆ一体に押圧
して所定ストローク前進する。Therefore, the piston 2b presses the piston 2cf together and moves forward by a predetermined stroke.
この第２段目の前進動作により、金型内プレート２７が
更に前進し、ゲートカット・エジェクタビン２９のゲー
トカットｙＪ２９ａが成形品３１とランナ一部５２間の
ゲート部５３を切断する。Due to this second stage forward movement, the mold inner plate 27 further advances, and the gate cut yJ29a of the gate cut/ejector bin 29 cuts the gate portion 53 between the molded product 31 and the runner part 52.
さらに、切換弁１５のンレノイドＳＱＬ◎全作動させて
弁位置をオフセラ）Ａ位置に切換え、切換弁１５の一次
側作動油全シリンダ部３ｃの後方空間部５Ｃに供給する
。Furthermore, the switching valve 15 is fully operated to switch the valve position to the offset valve A position, and the primary hydraulic oil of the switching valve 15 is supplied to the rear space 5C of the entire cylinder section 3c.
この作動油は連通路８を介して前方空間部６ｂに供給さ
れ、ピスト７２ ｂ ｆ後退させて原点位置に戻すとと
もに、前方空間部６ｂの作動油全切換弁１５を経てタン
クへ戻すとともにピストン２Ｃを前進動させる。This hydraulic oil is supplied to the front space 6b via the communication path 8, and is moved back to the piston 72bf to return to its original position, and is returned to the tank via the hydraulic oil full switching valve 15 in the front space 6b, as well as to the piston 2C. move forward.
これによシ、ゲートカット・エジェクタ端／２９のエジ
ェクタ端２９ ｂが成形品３１の底面を押圧する。次に
、切換弁１５の弁位置ＱＢ側に切換えて、今度は前方空
間部６Ｃをボートロ１２から作動油を供給してピストン
２ａｉ後退勤させ、後方空間部のボートロ１１から作動
油を排出して切換弁１５からタンクへ還流させる。As a result, the ejector end 29b of the gate cut ejector end/29 presses against the bottom surface of the molded product 31. Next, the switching valve 15 is switched to the valve position QB side, this time the front space 6C is supplied with hydraulic oil from the boat trowel 12, the piston 2ai is moved backward, and the hydraulic oil is discharged from the boat 11 in the rear space. The flow is returned to the tank from the switching valve 15.
このピストン２Ｃの往復動作を数回繰シ返して金型から
成形品３１を確実に突き出し、しかも面倒なゲートカッ
ト等の作業を不要とした成形品３１を作シ出すことがで
きる。By repeating this reciprocating motion of the piston 2C several times, the molded product 31 can be reliably ejected from the mold, and the molded product 31 can be produced without the need for troublesome work such as gate cutting.
本実施例のエジェクタ作動装置は油圧駆動による制御回
路を用いたが、他の作動媒体、空気圧や電気等の作用に
よシ行なうことも可能である。Although the ejector actuating device of this embodiment uses a control circuit driven by hydraulic pressure, it is also possible to operate by using other working media, air pressure, electricity, or the like.
また、後段の前方空間部と前段の後方空間部間を接続す
るには、実施例のピストンに連通孔を設ける以外にシリ
ンダ外部を経由する連通路であってもよい。Further, in order to connect the rear space in the rear stage and the rear space in the front stage, instead of providing a communication hole in the piston of the embodiment, a communication passage via the outside of the cylinder may be used.
（発明の効果）
以上説明したことから、本発明は従来の射出成形機の構
造を変更することなく、エジェクタシリンダに複数の独
立して駆動可能なピストンに設け、段階的にエジェクタ
を送シ出し、かつ最前段のピストンは往復動可能とした
ので、ベントシール、ゲートカット、多段突き出しを簡
単な金型構成で行ない、金型のコスト低減を図るととも
に、射出成形機の装備も簡易な構成であるから装置の信
頼性を確保し、コストも安価にできる効果がある。(Effects of the Invention) From the above explanation, the present invention provides a plurality of independently drivable pistons in the ejector cylinder and feeds the ejector in stages without changing the structure of the conventional injection molding machine. , and the piston in the first stage can reciprocate, so vent sealing, gate cutting, and multi-stage ejection can be performed with a simple mold configuration, reducing mold costs and making it possible to equip the injection molding machine with a simple configuration. This has the effect of ensuring the reliability of the device and reducing costs.
第１図は本発明に係るエジェクタ作動装置の構成を説明
するエジェクタシリンダと作動制御回路の動作構成図、
第２図は本装置に使用する金型のエジェクタ構造を示す
一部断面概略図、
第５図は本装置の各ピストンの作動過＠を示すとともに
エジェクタにおけるストロークの時間に対する変化を示
すグラフ図である。
１・・・エジェクタ作動装置
２ａ、２ｂ、２ｃｍ−−ピストン
７．８−１・連通路 ９，１０，１１．１２・
・・ボートロ１３．１４，１５・・・切換弁
特許出願人 株式会社名機製作所
１ エザエクタイ乍重υ枝雪
２ａ、２ｂ、２ｃ −Ｃストソ
３ａ、３ｂ、３ｃ シ１ル９″部
６ｃＩβｈ６ｃ 前方９聞部
７．８ ３１通を夕
９．１０．１１１２・ パで一トロ
第２図
第３図FIG. 1 is an operational configuration diagram of an ejector cylinder and an operation control circuit to explain the configuration of an ejector actuating device according to the present invention. FIG. 2 is a partial cross-sectional schematic diagram showing the ejector structure of a mold used in this device. FIG. 5 is a graph showing the operating progress of each piston of the present device and also showing changes in the stroke of the ejector with respect to time. 1... Ejector actuating device 2a, 2b, 2cm--Piston 7.8-1・Communication path 9,10,11.12・
...Boutro 13, 14, 15...Switching valve patent applicant Meiki Seisakusho Co., Ltd. 1 Ezaektai 乍上 υ ED snow 2a, 2b, 2c -C strut 3a, 3b, 3c Seale 9'' part 6c Iβh6c Front 9 Part 7.8 31 letters were sent in the evening on 9.10.1112/Toro in Pa Figure 2 Figure 3
Claims (1)
圧するように連接された複数段のピストン構成からなる
エジェクタシリンダと各ピストンを所定の手順に従って
作動する作動制御回路を設け、 各ピストンを配設したそれぞれのシリンダ 部は、各段ごとに順次その径を縮少するとともに各ピス
トンに画成される前方空間部と後方空間部を形成し、か
つ連接するシリンダ部間で後段の前方空間部と前段の後
方空間部を連通させ、 しかも各シリンダの後方空間部および最前 段の前方空間部には作動媒体を流出入させるそれぞれの
ポート口を形成し、各ピストンを独立に作動させる前記
作動制御回路の切換弁を各シリンダ部に対応させてそれ
ぞれの前記ポート口に接続して設けたことを特徴とする
射出成形機のエジェクタ作動装置。(1) An ejector cylinder consisting of a multi-stage piston configuration that is connected so as to press the front piston with the forward movement of the rear piston, and an operation control circuit that operates each piston according to a predetermined procedure, and each piston is arranged. Each cylinder part gradually reduces its diameter for each stage, and forms a front space and a rear space defined by each piston, and between the connected cylinder parts, the front space of the rear stage and the front space of the front stage are formed. The operation control circuit communicates the rear spaces of the cylinders, and the rear space of each cylinder and the front space of the most forward stage are formed with respective port openings through which the working medium flows in and out, and each piston is actuated independently. An ejector actuating device for an injection molding machine, characterized in that a switching valve is provided corresponding to each cylinder portion and connected to the respective port opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24516485A JPS62104722A (en) | 1985-10-31 | 1985-10-31 | Ejector-actuating device of injection molder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24516485A JPS62104722A (en) | 1985-10-31 | 1985-10-31 | Ejector-actuating device of injection molder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62104722A true JPS62104722A (en) | 1987-05-15 |
Family
ID=17129563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24516485A Pending JPS62104722A (en) | 1985-10-31 | 1985-10-31 | Ejector-actuating device of injection molder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62104722A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07137107A (en) * | 1994-04-20 | 1995-05-30 | Fanuc Ltd | Injection molding method |
| JPH09193197A (en) * | 1996-01-19 | 1997-07-29 | Meiki Co Ltd | Opening control mechanism for needle valve of injection machine |
| FR2878182A1 (en) * | 2004-11-19 | 2006-05-26 | Seco Ind Sa | Sprue cutting procedure for injected thermoplastic products consists of making series of cuts during molding operation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58188641A (en) * | 1982-04-30 | 1983-11-04 | Mitsubishi Heavy Ind Ltd | Multiple extruding device of injection molding machine |
| JPS59199229A (en) * | 1983-04-28 | 1984-11-12 | Hitachi Lighting Ltd | Two-stage injection apparatus of injection mold |
-
1985
- 1985-10-31 JP JP24516485A patent/JPS62104722A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58188641A (en) * | 1982-04-30 | 1983-11-04 | Mitsubishi Heavy Ind Ltd | Multiple extruding device of injection molding machine |
| JPS59199229A (en) * | 1983-04-28 | 1984-11-12 | Hitachi Lighting Ltd | Two-stage injection apparatus of injection mold |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07137107A (en) * | 1994-04-20 | 1995-05-30 | Fanuc Ltd | Injection molding method |
| JPH09193197A (en) * | 1996-01-19 | 1997-07-29 | Meiki Co Ltd | Opening control mechanism for needle valve of injection machine |
| FR2878182A1 (en) * | 2004-11-19 | 2006-05-26 | Seco Ind Sa | Sprue cutting procedure for injected thermoplastic products consists of making series of cuts during molding operation |
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