JPS6110423A - Ejector mechanism in injection molding machine - Google Patents

Ejector mechanism in injection molding machine

Info

Publication number
JPS6110423A
JPS6110423A JP12998684A JP12998684A JPS6110423A JP S6110423 A JPS6110423 A JP S6110423A JP 12998684 A JP12998684 A JP 12998684A JP 12998684 A JP12998684 A JP 12998684A JP S6110423 A JPS6110423 A JP S6110423A
Authority
JP
Japan
Prior art keywords
timing belt
ejector
ejector plate
nut
injection molding
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
JP12998684A
Other languages
Japanese (ja)
Other versions
JPH0442970B2 (en
Inventor
Yoshihiro Nishimura
良弘 西村
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Priority to JP12998684A priority Critical patent/JPS6110423A/en
Publication of JPS6110423A publication Critical patent/JPS6110423A/en
Publication of JPH0442970B2 publication Critical patent/JPH0442970B2/ja
Granted legal-status Critical Current

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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • B29C2045/4036—Ejector constructions; Ejector operating mechanisms driven by a screw and nut mechanism

Landscapes

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

Abstract

PURPOSE:To enable control of the optimum ejection speed and force corresponding to a product, by moving an ejector plate by a servomotor. CONSTITUTION:An ejector plate 5 is moved and ejector pins 4, 4' are moved and controlled by a servomotor 16 fixed to a base 17 of an injection molding machine. After mold opening, the servomotor 16 is driven, a timing belt gear 19, timing belt 20, nut 15, spline shaft 14, rotating shaft 11, timing belt gear 12, timing belt 13, timing belt gears 9, 9' and ball nuts 8, 8' are turned, the ball nuts are moved rightward along ball screws 2, 2' and the ejector pins 4, 4' fixed to the ejector plate are moved. The titled machine can be controlled by making a moving rate very delicately as compared with a hydraulically controlled type machine.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、射出成形機において成形品を突き出すエジェ
クター機構に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ejector mechanism for ejecting a molded product in an injection molding machine.

従来技術 従来の射出成形機におけるエジェクター機構は、成形品
を突き出すエジェクターピンを有づるエジェクター板の
移動を油圧シリンダー等の油圧機構により行なっていた
。Prior Art The ejector mechanism in a conventional injection molding machine uses a hydraulic mechanism such as a hydraulic cylinder to move an ejector plate having an ejector pin for ejecting a molded product.

発明が解決しようとする問題点 このような従来技術にあっては、成形品に応じてエジェ
クター板の速度が力を微妙に変化さけて制御することが
困難であり、エジェクター板の背後に油圧シリンダー等
がｉＱｌノられるため重用が増して慣性が大きく可動盤
の制御しにくい欠点もあった。Problems to be Solved by the Invention In such conventional technology, it is difficult to control the speed of the ejector plate without changing the force slightly depending on the molded product, and a hydraulic cylinder is installed behind the ejector plate. etc., due to the increased use of iQL, which also had the drawback of having a large inertia and making it difficult to control the movable platen.

従って、この発明においては、エジェクター板の移動を
モーターにより行なわせるにうにづると共に、可動盤に
かけられる重量を軽減すると共に、成形品突き出し速度
や力の制御が行いやずくすることにある。Therefore, in this invention, the ejector plate can be moved by a motor, the weight placed on the movable platen can be reduced, and the molded product ejection speed and force can be easily controlled.

問題点を解決するための手段 上記問題点を解決するために、この発明は、射出成形機
においてエジェクター板を移動させるために油圧シリン
ダー等を用いずに、サーボモータを射出成形機のベース
に固設し、可動盤の背面に突設されたボールスクリュー
と、エジェクター板に回動自在に設けられた上記ボール
スクリューに螺合するボールナットを設け、上記サーボ
モータによりスプライン軸を介して上記ボールナットを
転動させ、エジェクター板およびエジェクターピンを動
かそうとするものである。Means for Solving the Problems In order to solve the above problems, the present invention provides a method in which a servo motor is fixed to the base of an injection molding machine without using a hydraulic cylinder or the like to move the ejector plate in the injection molding machine. A ball screw protruding from the back of the movable platen and a ball nut screwed onto the ball screw rotatably provided on the ejector plate are provided, and the servo motor drives the ball nut through the spline shaft. The purpose is to roll the ejector plate and ejector pin.

作　　用 射出成形が行なわれ、冷却侵可動盤が後退して型が開く
と、ベースに設けられたサーボモータを駆動させ、スプ
ライン軸、タイミングベルト歯車、ベルト等の伝達手段
を介し、サーボモータの回転をボールナットに伝達する
。ボールナットはエジェクター板に回動自在に設けられ
ているので回転し、エジェクター板およびエジェクター
ピンを可動盤方向へ前進させ、そして、エジェクターピ
ンを可動盤のガイド孔より突出させて製品を突き出す。Operation When injection molding is performed and the mold is opened by retracting the cooling erodible platen, the servomotor installed in the base is driven, and the servomotor is driven through transmission means such as spline shafts, timing belt gears, and belts. Transmits rotation to the ball nut. Since the ball nut is rotatably provided on the ejector plate, it rotates to move the ejector plate and ejector pin forward toward the movable platen, and then causes the ejector pin to protrude from the guide hole of the movable platen, thereby ejecting the product.

実施例 図面は本発明の実施例を示し、射出成形機の型締部の可
動盤１の背面にはボールスクリュー２゜２′が突設され
る。可動１１に窄設されたガイド孔３，３′に挿入する
エジェクターピン４，４′を有するエジェクター板５に
は、ボールスクリュー２．２’の貫通する透孔６，６′
が設けられ、透孔６，６′にはベアリング７．７′を介
してエジェクター板５に対して回動自在に固着され、か
つボールスクリュー２．２′に係合するボールナット８
，８′が設けられている。そして、ボールナット８．８
′の外周にはタイミングベルト歯車９．９′が固設され
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of the present invention, in which a ball screw 2.degree. 2' is protruded from the back side of a movable platen 1 of a mold clamping section of an injection molding machine. The ejector plate 5 has ejector pins 4, 4' inserted into guide holes 3, 3' formed in the movable member 11, and has through holes 6, 6' through which the ball screws 2.2' pass.
A ball nut 8 is rotatably fixed to the ejector plate 5 via a bearing 7.7' in the through hole 6, 6' and engages with the ball screw 2.2'.
, 8' are provided. And ball nut 8.8
A timing belt gear 9.9' is fixedly installed on the outer periphery of '.

また、エジェクター板５の下方背面には、ベアリング１
０を介しエジェクター板５に対して回動自在に回動輪１
１が突設され、回動軸１１には回動軸１１と連動するタ
イミングベルト歯車１２が設けられタイミングベルト歯
１！９．９’　、１２には第１のタイミングベルト１３
がかけられて連動するようになっている。さらに、上記
回動軸１１の他方はスプライン軸１４となっており該ス
プライン軸１４のとスプライン係合するナツト１５が設
けられ該ナツト１５の外周はタイミングベルト歯車が設
けられ射出成形機のベース１７に固設されたサーボモー
タ１６により駆動されるタイミング歯車１９、及びタイ
ミングベルト２０により該ナツト１５は駆動されるよう
になっている。なお、」二記ナツト１５はスラストベア
リング２１でベース１７に対回転自在に固着され、該ナ
ツト１５は、軸方向には移動できないようになっている
。In addition, a bearing 1 is provided on the lower back surface of the ejector plate 5.
The rotary wheel 1 is rotatably rotated with respect to the ejector plate 5 through the
1 is provided protrudingly, and the rotation shaft 11 is provided with a timing belt gear 12 that interlocks with the rotation shaft 11. Timing belt teeth 1!9.9' are provided on the rotation shaft 11, and a first timing belt 13 is provided on the rotation shaft 11.
is applied to make them work together. Further, the other of the rotating shafts 11 is a spline shaft 14, and a nut 15 is provided for spline engagement with the spline shaft 14. A timing belt gear is provided on the outer periphery of the nut 15, and a base 17 of the injection molding machine is provided. The nut 15 is driven by a timing gear 19 and a timing belt 20 driven by a servo motor 16 fixedly attached to the nut 15. Note that the nut 15 is rotatably fixed to the base 17 by a thrust bearing 21, and cannot be moved in the axial direction.

射出、冷却行程が終了し、可動盤１が図中左方に移動し
、金型を開き始めると、該可動盤１、ボールスクリュー
２．２’　、エジェクター板５、ボールナット８．８’
　、タイミングベルト歯車９゜９’、１２、回転軸１１
は一体となって図中左方に移動する。その結果回転軸１
１に設けられたスプライン軸１４は係合するナツト１５
のスプライン溝にそって摺動し、ナツト１５、タイミン
グ歯車９．９’、１２は回転することもなく、可動盤１
とエジェクター板５の相対位置も変化することはない。When the injection and cooling processes are completed and the movable platen 1 moves to the left in the figure and begins to open the mold, the movable platen 1, ball screw 2.2', ejector plate 5, and ball nut 8.8'
, timing belt gear 9°9', 12, rotation shaft 11
move as one to the left in the figure. As a result, rotation axis 1
A spline shaft 14 provided at 1 is engaged with a nut 15.
The nut 15 and timing gears 9.9' and 12 do not rotate, and the movable platen 1
The relative positions of the ejector plate 5 and the ejector plate 5 also remain unchanged.

こうして可動盤１等が図面中左方に移動し金型が開き終
わると、サーボモータ１６を駆動し、タイミングベルト
歯車１９、タイミングベルト２０．ナツト１５、スプラ
イン軸１／１１回転軸１１、タイミングベルト歯車１２
、タイミングベルト１３、タイミングベルト歯車９，９
′及びボールナット８，８′を回転させる。ボールナッ
ト８．８′が回転すると、ボールスクリュー２゜２′に
そって該ボールナット８，８′は図中右方に移動し、該
ボールナット８．８′に固着されたエジェクターピン タービン４．４′を金型内に突出し成形品を突出するこ
ととなる。またサーボモータ１６を逆転させれば、エジ
ェクター板５は図中左方に移動しエジェクターピン４．
４′を金型から抜は出ることとなる。なお、型締のとき
は金型を開くとき説明したように可動盤１、エジェクタ
ー板５等の相対位置は変化せず、スプライン軸１４とナ
ツト１５が摺動して全体が移動することとなる。In this way, when the movable platen 1 etc. moves to the left in the drawing and the mold finishes opening, the servo motor 16 is driven, and the timing belt gear 19, timing belt 20, etc. are driven. Nut 15, spline shaft 1/11 rotation shaft 11, timing belt gear 12
, timing belt 13, timing belt gears 9, 9
' and ball nuts 8, 8'. When the ball nut 8.8' rotates, the ball nut 8,8' moves to the right in the figure along the ball screw 2°2', and the ejector pin turbine 4 fixed to the ball nut 8.8' moves to the right in the figure. .4' is ejected into the mold to eject the molded product. Further, if the servo motor 16 is reversed, the ejector plate 5 moves to the left in the figure and the ejector pin 4.
4' will be removed from the mold. Note that during mold clamping, as explained when opening the mold, the relative positions of the movable platen 1, ejector plate 5, etc. do not change, but the spline shaft 14 and nut 15 slide and the entire mold moves. .

効　　果 以上のように、本発明はサーボモータにより工ジェクタ
ー板を移動するようにしたので、製品に応じた最適な突
出し速度や、突出し力を制御することが容易にできる。Effects As described above, since the present invention uses a servo motor to move the ejector plate, it is possible to easily control the optimum ejection speed and ejection force depending on the product.

また、サーボモータをベースに固定し、スプライン軸を
設けてサーボモータの回転を伝達するようにしたので、
可動盤に加わる重量が軽くなり、慣性が小さくなり、可
動盤の制御も容易となる。In addition, the servo motor is fixed to the base and a spline shaft is provided to transmit the rotation of the servo motor.
The weight applied to the movable platen is reduced, the inertia is reduced, and the control of the movable platen becomes easier.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例の一部断面図。 １・・・可動盤、２．２′・・・エジェクターピン、３
．３′・・・ガイド孔、４，４′・・・エジェクターピ
ン、５・・・エジェクター板、６．６′・・・透孔、８
．８′・・・ボールナット、９．９’　、１２．１９・
・・タイミングベルト歯車、１１・・・回転軸、１３．
２０・・・タイミングベルト、１４・・・スプライン軸
、１５・・・ナツト、１６・・・サーボモータ、１７・
・・ベース。The drawing is a partial sectional view of one embodiment of the present invention. 1...Movable plate, 2.2'...Ejector pin, 3
．． 3'...Guide hole, 4,4'...Ejector pin, 5...Ejector plate, 6.6'...Through hole, 8
．． 8'...Ball nut, 9.9', 12.19.
...Timing belt gear, 11...Rotating shaft, 13.
20...Timing belt, 14...Spline shaft, 15...Nut, 16...Servo motor, 17...
··base.

Claims (1)

【特許請求の範囲】[Claims] 射出成形機の可動盤に突設されたボールスクリューと、
エジェクターピンを有し上記ボールスクリュー螺合する
ボールナットを回動自在に取付けたエジェクター板と、
上記ボールナットに固着されたタイミングベルト歯車と
上記エジェクター板に回動自在に突設されスプライン軸
を有しかつタイミングベルト歯車が固着された回転軸と
上記タイミング歯車間にかけられたタイミングベルトと
、上記スプライン軸と係合するナットと該ナットを回転
させる射出成形機のベースに設置されたサーボモータよ
りなる射出成形機におけるエジェクター機構。A ball screw protruding from the movable platen of an injection molding machine,
an ejector plate having an ejector pin and rotatably mounted with a ball nut to which the ball screw is screwed;
a timing belt gear fixed to the ball nut, a rotating shaft rotatably protruding from the ejector plate, having a spline shaft and having the timing belt gear fixed thereto, and a timing belt extending between the timing gear; An ejector mechanism in an injection molding machine that includes a nut that engages with a spline shaft and a servo motor installed at the base of the injection molding machine that rotates the nut.
JP12998684A 1984-06-26 1984-06-26 Ejector mechanism in injection molding machine Granted JPS6110423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12998684A JPS6110423A (en) 1984-06-26 1984-06-26 Ejector mechanism in injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12998684A JPS6110423A (en) 1984-06-26 1984-06-26 Ejector mechanism in injection molding machine

Publications (2)

Publication Number Publication Date
JPS6110423A true JPS6110423A (en) 1986-01-17
JPH0442970B2 JPH0442970B2 (en) 1992-07-15

Family

ID=15023328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12998684A Granted JPS6110423A (en) 1984-06-26 1984-06-26 Ejector mechanism in injection molding machine

Country Status (1)

Country Link
JP (1) JPS6110423A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6162012U (en) * 1984-09-28 1986-04-26
JPH01108715U (en) * 1988-01-14 1989-07-24
WO1991014561A1 (en) * 1990-03-29 1991-10-03 Fanuc Ltd Ejector mechanism of injection molding machine
US5310331A (en) * 1990-06-16 1994-05-10 Fanuc Ltd Injection molding machine with a mold core drive apparatus
DE29515085U1 (en) 1994-10-03 1995-11-23 Engel Maschinenbau Ges.M.B.H., Schwertberg Ejector unit for injection molding machines
WO2002057062A1 (en) * 2001-01-17 2002-07-25 Krauss-Maffei Kunststofftechnik Gmbh Ejector device for a moulding machine
KR100707672B1 (en) * 2006-01-25 2007-04-13 엘에스전선 주식회사 Molding ejecting device of mold clamping device
CN109483812A (en) * 2018-11-21 2019-03-19 陈莉莉 Injection mold is used in a kind of production of automobile lamp

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58167143A (en) * 1982-03-30 1983-10-03 Nissei Plastics Ind Co Ejector for molding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58167143A (en) * 1982-03-30 1983-10-03 Nissei Plastics Ind Co Ejector for molding

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6162012U (en) * 1984-09-28 1986-04-26
JPH0235470Y2 (en) * 1984-09-28 1990-09-26
JPH01108715U (en) * 1988-01-14 1989-07-24
WO1991014561A1 (en) * 1990-03-29 1991-10-03 Fanuc Ltd Ejector mechanism of injection molding machine
US5196213A (en) * 1990-03-29 1993-03-23 Fanuc Ltd. Ejector mechanism in an injection molding machine
US5310331A (en) * 1990-06-16 1994-05-10 Fanuc Ltd Injection molding machine with a mold core drive apparatus
EP0487734B1 (en) * 1990-06-16 1995-09-20 Fanuc Ltd. Injection molding machine provided with metallic core driving device
DE29515085U1 (en) 1994-10-03 1995-11-23 Engel Maschinenbau Ges.M.B.H., Schwertberg Ejector unit for injection molding machines
WO2002057062A1 (en) * 2001-01-17 2002-07-25 Krauss-Maffei Kunststofftechnik Gmbh Ejector device for a moulding machine
KR100707672B1 (en) * 2006-01-25 2007-04-13 엘에스전선 주식회사 Molding ejecting device of mold clamping device
CN109483812A (en) * 2018-11-21 2019-03-19 陈莉莉 Injection mold is used in a kind of production of automobile lamp
CN109483812B (en) * 2018-11-21 2021-06-18 恩诚晶艺(杭州)模具制造有限公司 Injection mold is used in production of car lamps and lanterns

Also Published As

Publication number Publication date
JPH0442970B2 (en) 1992-07-15

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