JPH0453719A - Injection part of motorized injection molder - Google Patents
Injection part of motorized injection molderInfo
- Publication number
- JPH0453719A JPH0453719A JP16289590A JP16289590A JPH0453719A JP H0453719 A JPH0453719 A JP H0453719A JP 16289590 A JP16289590 A JP 16289590A JP 16289590 A JP16289590 A JP 16289590A JP H0453719 A JPH0453719 A JP H0453719A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- links
- crank
- link
- plate
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 45
- 239000007924 injection Substances 0.000 title claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000000465 moulding Methods 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/502—Drive means therefor screws axially driven by a crank or eccentric mechanism
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (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
この発明は、電動式射出成形機の射出部であって、特に
可動プレートの前後移動がクランク機構を介して行われ
るものに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an injection section of an electric injection molding machine, and particularly to one in which a movable plate is moved back and forth via a crank mechanism.
従来技術
電動式射出成形機は、ＮＣ制御装置を備えて型締・型開
き、射出、計量あるいはエジェクトの各駆動にサーボモ
ータを利用することで、射出成形工程を精密に制御し、
正確な成形品を油汚れなどのないクリーンな状況下で得
ることができる。Conventional electric injection molding machines are equipped with NC control devices and use servo motors to drive mold clamping, mold opening, injection, metering, and eject, thereby precisely controlling the injection molding process.
Accurate molded products can be obtained under clean conditions without oil stains.
一方、射出成形工程における各部の運動はほとんどが直
線の往復運動なので、電動式射出成形機ではサーボモー
タの回転を直線運動に変換する機構を備えている。On the other hand, since most of the movements of each part in the injection molding process are linear reciprocating motions, electric injection molding machines are equipped with a mechanism that converts the rotation of a servo motor into linear motion.
これを射出部について見ると、射出用サーボモータの回
転はボールスクリュー・ナツト機構を介して直線運動に
変換され、可動プレートが前方に移動されるのであるが
、しかし、このために前記ボールスクリュー、ポールス
クリュナツトやその他、サーボモータの回転をポールス
クリュナツトあるいはボールスクリューに伝達するため
のベルトやギアなど多数、多種の部品を必要としている
。Looking at this with respect to the injection section, the rotation of the injection servo motor is converted into linear motion via the ball screw nut mechanism, and the movable plate is moved forward. A large number and variety of parts are required, such as the pole screw nut and other belts and gears to transmit the rotation of the servo motor to the pole screw nut or ball screw.
また、ベルトによる伝動なので定期的なベルト張力の点
検が必要であるなど保守の上でも手間が多い。In addition, since the transmission is carried out by a belt, it is necessary to periodically check the belt tension, which requires a lot of maintenance.
さらに、ボールスクリュー・ナツト機構ではすばやい往
復直線運動を得るのが困難である。Furthermore, it is difficult to obtain rapid reciprocating linear motion with ball screw/nut mechanisms.
発明が解決しようとする課題
この発明は、部品点数が少なく、充分なストロークを備
え、かつ、射出・計量スクリューを前後にすばやく移動
させることができる、電動式創出成形機における射出部
の提供を課題とする。Problems to be Solved by the Invention The object of the invention is to provide an injection section for an electric creative molding machine that has a small number of parts, has a sufficient stroke, and can quickly move the injection/metering screw back and forth. shall be.
課題を解決するための手段
フロントプレートとリアプレート間に、射出・計量スク
リューを備えた可動プレートを射出軸線に沿って前後移
動可能に設ける。Means for Solving the Problem A movable plate provided with an injection/metering screw is provided between the front plate and the rear plate so as to be movable back and forth along the injection axis.
可動プレートとリアプレートをダブルクランク機構で結
合する。The movable plate and rear plate are connected by a double crank mechanism.
ダブルクランク機構は射出軸線に沿って前後に移動する
摺動体、射出用サーボモータで駆動されるクランク駆動
機構および第１リンクと第２リンクからなる一対のクラ
ンクリンクを備える。The double crank mechanism includes a sliding body that moves back and forth along the injection axis, a crank drive mechanism driven by an injection servo motor, and a pair of crank links consisting of a first link and a second link.
クランクリンクにおける一対の第１リンクの一端をクラ
ンク駆動機構の出力軸に１８０°の位相差で固着し、そ
れぞれの他端に第２リンクの一端を回動自在に連結し、
一方の第２リンクの他端をリアプレートに、他方の第２
リンクの他端を可動プレートにそれぞれ回動自在に連結
する。One end of a pair of first links in the crank link is fixed to the output shaft of the crank drive mechanism with a phase difference of 180°, and one end of the second link is rotatably connected to the other end of each,
The other end of one second link is attached to the rear plate, and the other end of the second link is attached to the rear plate.
The other ends of the links are rotatably connected to the movable plates.
作用
射出用サーボモータが駆動されると、一対のクランクリ
ンクを介して可動プレートがフロントプレートに対して
前方に移動され、可動プレートに装着された射出・計量
スクリューによって樹脂の射出が行われる。When the injection servo motor is driven, the movable plate is moved forward with respect to the front plate via a pair of crank links, and resin is injected by an injection/metering screw attached to the movable plate.
この時、射出用サーボモータを取付けた摺動体は可動プ
レートの１／２ストロークで同じ方向に移動する。At this time, the sliding body to which the injection servo motor is attached moves in the same direction with a 1/2 stroke of the movable plate.
可動プレートは、計量過程における樹脂圧で射出・計量
スクリューが押し戻されることにより、後退する。The movable plate retreats as the injection/metering screw is pushed back by resin pressure during the metering process.
実施例
第１．２図は電動式射出成形機の射出部１を概略で示し
、エキストルーダ−ベース２上にフロントプレート３と
リアプレート４が前後に間隔を取って固定され、両プレ
ート３．４間に可動プレート５が前記の両プレート３．
４間を結合するタイロッド６に前後方向へ移動自在に装
着されている。Embodiment FIG. 1.2 schematically shows an injection section 1 of an electric injection molding machine, in which a front plate 3 and a rear plate 4 are fixed on an extruder base 2 with a space between them in the front and back, and both plates 3.4 A movable plate 5 is located between the two plates 3.
It is attached to a tie rod 6 that connects the four parts so as to be movable in the front and rear direction.
可動プレート５は前面で射出・計量スクリュー７の基部
を回転のみ許容して軸架すると共に、これを回転駆動す
る計量用サーボモータ（図示していない）を備える。こ
のスクリュー７はフロントプレート３の前面に固定され
たシリンダアッセンブリ８内に挿通されて前後移動する
。The movable plate 5 axially supports the base of the injection/metering screw 7 on its front surface, allowing only rotation thereof, and is equipped with a metering servo motor (not shown) for rotationally driving this. This screw 7 is inserted into a cylinder assembly 8 fixed to the front surface of the front plate 3 and moves back and forth.
可動プレート５とリアプレート４はダブルクランク機構
９で結合される。The movable plate 5 and the rear plate 4 are connected by a double crank mechanism 9.
ダブルクランク機構９は前記のタイロッド６に装着され
、射出軸線ａ（射出・計量スクリュー７の軸線に一致す
る前後方向の線）に沿って前後に移動可能な摺動体１０
と、これに取付けられ射出用サーボモータ１１で駆動さ
れるクランク駆動機構１２および第１リンク１３ａ、１
３ｂと第２リンク１４ａ、１４ｂからなる一対のクラン
クリンク１５．１６を備え、前記のクランクリンク１５
゜１６における一対の第１リンク１３ａ、１３ｂの一端
をクランク駆動機構１２の出力軸１７に１８０°の位相
差で固着し、それぞれの他端に第２リンク１４ａ、１４
ｂの一端を回動自在に連結し、一方の第２リンク１４ａ
の他端をリアプレート４の前面に、また、他方の第２リ
ンク１４ｂの他端を可動プレート５の後面にそれぞれピ
ン１８，１９で回動自在に連結しである。The double crank mechanism 9 is attached to the tie rod 6 and includes a sliding body 10 that is movable back and forth along the injection axis a (a line in the front and back direction that coincides with the axis of the injection/metering screw 7).
and a crank drive mechanism 12 and first links 13a, 1 attached to this and driven by an injection servo motor 11.
3b and a pair of crank links 15 and 16 consisting of second links 14a and 14b, the crank link 15
One end of the pair of first links 13a, 13b at 16° is fixed to the output shaft 17 of the crank drive mechanism 12 with a phase difference of 180°, and a second link 14a, 14 is attached to the other end of each of the first links 13a, 13b.
One end of b is rotatably connected, and one second link 14a
The other end is rotatably connected to the front surface of the rear plate 4, and the other end of the second link 14b is rotatably connected to the rear surface of the movable plate 5 by pins 18 and 19, respectively.
射出用サーボモータ１１は摺動体１０の下部にモータ軸
を垂直にして取り付けられ、高い減速比の減速器２０が
直結されている。クランク駆動機構１２はこのようなサ
ーボモータ１１と減速器２０で構成され、減速器２０の
出力軸２１が前記クランク機構１２の出力軸１７となっ
ている。The injection servo motor 11 is attached to the lower part of the sliding body 10 with its motor shaft vertical, and is directly connected to a reducer 20 having a high reduction ratio. The crank drive mechanism 12 includes such a servo motor 11 and a speed reducer 20, and the output shaft 21 of the speed reducer 20 serves as the output shaft 17 of the crank mechanism 12.
射出成形機の射出過程で射出用サーボモータ１１が駆動
されると、減速器２０の出力軸２１によって第１リンク
１３ａ、１３ｂが第１図においてホームポジション（Ａ
）から射出完了位ｌｉｔ （Ｂ）に駆動回転されるので
、クランクリンク１５．１６は伸長し、可動プレート５
がフロントプレート３に対し前進し、射出が行われる。When the injection servo motor 11 is driven during the injection process of the injection molding machine, the output shaft 21 of the reducer 20 moves the first links 13a and 13b to the home position (A) in FIG.
) to the injection completion position lit (B), the crank links 15 and 16 extend, and the movable plate 5
advances toward the front plate 3, and injection is performed.
射出完了位ｌｉｔ （Ｂ）はクランクリンク１５，１６
における第１リンク１３ａ、１３ｂと第２リンク１４ａ
、１４ｂが直線となる直前の位置である。Injection completion position lit (B) is crank link 15, 16
The first links 13a, 13b and the second link 14a in
, 14b is the position immediately before the straight line.
なお、ホームポジション（Ａ）、射出完了位置（Ｂ）は
ＮＣ制御上のパラメータを変更することで調整すること
ができる。Note that the home position (A) and the injection completion position (B) can be adjusted by changing parameters on the NC control.
ついで、計量過程では、射出用サーボモータ１１が背圧
を制御する程度の軽い電力供給状態とされ、一方、計量
用サーボモータによって射出・計量スクリュー７が駆動
回転されてシリンダアッセンブリ８の先端部（樹脂溜ま
り）に樹脂が送り込まれるので、この樹脂の背圧によっ
て、該スクリュー７が後退し、クランクリンク１５．１
６が逆転されて第１リンク１３ａ、ｉ３ｂはホームポジ
ション（Ａ）に戻る。Then, in the metering process, the injection servo motor 11 is brought into a light power supply state to control the back pressure, while the injection/metering screw 7 is driven and rotated by the metering servo motor, and the tip of the cylinder assembly 8 ( Since the resin is fed into the resin reservoir), the back pressure of this resin causes the screw 7 to retreat, and the crank link 15.1
6 is reversed and the first links 13a, i3b return to their home positions (A).
この時、第３図のように、第１リンク１３ａ。At this time, as shown in FIG. 3, the first link 13a.
１３ｂの長さをＬａ、Ｌｂ、第２リンク１４ａ。The length of 13b is La, Lb, and the second link 14a.
１４ｂの長さをＭａ、Ｍｂとし、第１リンク１３ａ、１
３ｂの回転角度を００とすると、クランクリンク１５．
１６による可動プレート５のストローク分Ｓａ、Ｓｂは
、はぼ
５ａ＝Ｌｔ＋Ｍｚ−
（Ｌｓ ｃｏｓθ十八ア７語］フ］）
Ｓｂ＝Ｌｂ＋Ｍｂ
（Ｌｂ ｃｏｓθ＋ｂア＝７ユフ７）
となり、摺動体１０は移動するので、可動プレート５の
全体としてのストローク（Ｓ）は［５）＝Ｓａ＋Ｓｂ
である。摺動体１０のストロークはｓｂでクランクリン
ク１６に関する分である。The lengths of 14b are Ma and Mb, and the first links 13a and 1
If the rotation angle of 3b is 00, then crank link 15.
The strokes Sa and Sb of the movable plate 5 due to 16 are as follows. Therefore, the overall stroke (S) of the movable plate 5 is [5)=Sa+Sb. The stroke of the sliding body 10 is sb relative to the crank link 16.
通常、第１リンク１３ａと１３ｂ１第２リンク１、４
ａと１４ｂは長さが等しく （Ｌａ＝Ｌｂ、Ｍａ＝Ｍ
ｂ）、したがって５ａ＝Ｓｂであるが、第１リンク１３
ａに対し同１３ｂの長さを変えるように、一方に対して
他方の長さを変化させて、Ｓａ≠ｓｂとすることもある
。また、各リンクの長さを比例的に増減し、ストローク
の大小を調整することもできる。Usually, first links 13a and 13b1 second links 1 and 4
a and 14b have the same length (La=Lb, Ma=M
b), so 5a=Sb, but the first link 13
Just as the length of the same 13b is changed with respect to a, the length of one may be changed with respect to the other, so that Sa≠sb. It is also possible to increase or decrease the length of each link proportionally to adjust the size of the stroke.
以上は実施例である。The above is an example.
射出用サーボモータ１１は摺動体１ｏの上面側にモータ
軸を水平にして配置することもある。The injection servo motor 11 may be arranged with the motor shaft horizontal on the upper surface side of the sliding body 1o.
クランクリンク１５．１６の各々をそれ自身並列なダブ
ルクランク構造とすることもある。Each of the crank links 15, 16 may itself be of parallel double crank construction.
発明の効果
前後に移動可能な摺動体を挟んで前後にクランクリンク
が配置されたダブルクランク構造であるから、可動プレ
ートのストロークを大きく取れ、また、すばやく作動さ
せることができる。Advantages of the Invention Since it has a double crank structure in which crank links are arranged front and rear with a sliding body movable front and rear in between, the movable plate can have a large stroke and can be operated quickly.
射出用サーボモータやクランク駆動機構を摺動体にまと
めて配置することができるので、中間の伝達機構が省略
され、比較的少ない部品点数で構成できる。Since the injection servo motor and the crank drive mechanism can be arranged together on the sliding body, an intermediate transmission mechanism can be omitted and the structure can be constructed with a relatively small number of parts.
また、射出用サーボモータとクランク駆動機構が近接し
て配置されるので射出のための動力伝達機構の剛性が高
く、保守も容易である。Furthermore, since the injection servo motor and the crank drive mechanism are arranged close to each other, the power transmission mechanism for injection has high rigidity and is easy to maintain.
第１図は簡略に示す平面図、第２図は第１図の１−１線
に沿った断面を含む正面図、第３図は説明のための線図
である。
１・・・射出部、３・・・フロントプレート、４・・・
リアプレート、５・・・可動プレート、９・・・クラン
ク機構、１０・・・摺動体、１１・・・射出用サーボモ
ータ、１２・・・クランク駆動機構、１３ａ、１３ｂ・
・・第１リンク、１４ａ、１４ｂ・・・第２リンク、１
５．１６・・・クランクリンク、１７・・・出力軸、２
０・・・減速器。FIG. 1 is a simplified plan view, FIG. 2 is a front view including a cross section taken along line 1--1 in FIG. 1, and FIG. 3 is a diagram for explanation. 1... Injection part, 3... Front plate, 4...
Rear plate, 5... Movable plate, 9... Crank mechanism, 10... Sliding body, 11... Injection servo motor, 12... Crank drive mechanism, 13a, 13b.
...First link, 14a, 14b...Second link, 1
5.16... Crank link, 17... Output shaft, 2
0...Decelerator.
Claims (1)
リューを備えた可動プレートを射出軸線に沿って前後移
動可能に設け、可動プレートとリアプレートをダブルク
ランク機構で結合した構造を有し、前記ダブルクランク
機構は射出軸線に沿って前後に移動可能な摺動体とこれ
に取付けられ、射出用サーボモータで駆動されるクラン
ク駆動機構およびそれぞれ第１リンクと第２リンクから
なる一対のクランクリンクを備え、前記のクランクリン
クにおける一対の第１リンクの一端をクランク駆動機構
の出力軸に固着すると共に他端を出力軸の回転方向に関
し１８０゜の位相差で配置し、これらの他端に第２リン
クの一端をそれぞれ回動自在に連結し、一方の第２リン
クの他端をリアプレートに、他方の第２リンクの他端を
可動プレートにそれぞれ回動自在に連結してあることを
特徴とした電動式射出成形機の射出部。A movable plate equipped with an injection/measuring screw is provided between the front plate and the rear plate so as to be movable back and forth along the injection axis, and the movable plate and the rear plate are connected by a double crank mechanism. is equipped with a sliding body movable back and forth along the injection axis, a crank drive mechanism attached to the sliding body driven by an injection servo motor, and a pair of crank links each consisting of a first link and a second link. One end of a pair of first links in the crank link is fixed to the output shaft of the crank drive mechanism, and the other end is arranged with a phase difference of 180 degrees with respect to the rotational direction of the output shaft, and one end of the second link is attached to the other end of the pair. The electric injection type is characterized in that the other end of one second link is rotatably connected to the rear plate, and the other end of the second link is rotatably connected to the movable plate. Injection part of molding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162895A JP2597921B2 (en) | 1990-06-22 | 1990-06-22 | Injection section of electric injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162895A JP2597921B2 (en) | 1990-06-22 | 1990-06-22 | Injection section of electric injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0453719A true JPH0453719A (en) | 1992-02-21 |
| JP2597921B2 JP2597921B2 (en) | 1997-04-09 |
Family
ID=15763285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2162895A Expired - Fee Related JP2597921B2 (en) | 1990-06-22 | 1990-06-22 | Injection section of electric injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2597921B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1010512A1 (en) * | 1998-12-07 | 2000-06-21 | ENGEL Maschinenbau Gesellschaft mbH | Injection unit for an injection moulding machine |
| WO2001085429A1 (en) * | 2000-05-08 | 2001-11-15 | Procontrol Ag | Method and device for the injection moulding or pressing of plastic components |
| WO2007003452A1 (en) * | 2005-06-30 | 2007-01-11 | Krauss-Maffei Kunststofftechnik Gmbh | Electric injection group for an injection molding machine |
-
1990
- 1990-06-22 JP JP2162895A patent/JP2597921B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1010512A1 (en) * | 1998-12-07 | 2000-06-21 | ENGEL Maschinenbau Gesellschaft mbH | Injection unit for an injection moulding machine |
| US6425753B1 (en) | 1998-12-07 | 2002-07-30 | Engel Maschinenbau Gesellschaft M.B.H. | Injection unit for an injection molding machine |
| WO2001085429A1 (en) * | 2000-05-08 | 2001-11-15 | Procontrol Ag | Method and device for the injection moulding or pressing of plastic components |
| WO2007003452A1 (en) * | 2005-06-30 | 2007-01-11 | Krauss-Maffei Kunststofftechnik Gmbh | Electric injection group for an injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2597921B2 (en) | 1997-04-09 |
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