JPH0422972Y2 - - Google Patents
Info
- Publication number
- JPH0422972Y2 JPH0422972Y2 JP11809487U JP11809487U JPH0422972Y2 JP H0422972 Y2 JPH0422972 Y2 JP H0422972Y2 JP 11809487 U JP11809487 U JP 11809487U JP 11809487 U JP11809487 U JP 11809487U JP H0422972 Y2 JPH0422972 Y2 JP H0422972Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold clamping
- clamping force
- adjustment nut
- force adjustment
- tie bar
- 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
Links
- 230000005856 abnormality Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、射出成形機等におけるトグル式型締
装置に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a toggle type mold clamping device for an injection molding machine or the like.
（従来の技術とその問題点）
従来、トグル式型締装置では、第２図及び第３
図に示す如く、タイバー３のトグルサポート側端
部に、トグルサポート４に係止された型締力調整
ナツト１を螺合させると共に、トグルサポート４
と可動プラテン１５との間を、型締シリンダ１６
を挟んで対称に互に連結された２本２組のリンク
１７を介して連接し、かつ、型締シリンダ１６の
ロツド先端に装着されたクロスヘツド１８と前記
２組のリンクの一方のリンク１７をリンク１９を
介して連接しており、型締シリンダ１６のロツド
伸長作動によりタイバー３に沿い可動プラテン１
５を前進させ、前進端位置にてトグル機構１７〜
１９により拡大されたシリンダ力によつてタイバ
ー３を伸長させたとき反力として所定の型締力が
得られるよう、型締力調整ナツト１をギヤ２０を
介して回転調整して型締力を設定していた。(Prior art and its problems) Conventionally, in the toggle type mold clamping device, the
As shown in the figure, the mold clamping force adjustment nut 1 locked to the toggle support 4 is screwed onto the toggle support side end of the tie bar 3, and the toggle support 4
The mold clamping cylinder 16 is connected between the movable platen 15 and the movable platen 15.
The crosshead 18 is connected via two sets of links 17 that are symmetrically connected to each other with the mold clamping cylinder 16 in between, and the crosshead 18 attached to the rod tip of the mold clamping cylinder 16 is connected to one link 17 of the two sets of links. The platen 1 is connected via a link 19, and is movable along the tie bar 3 by the rod extension operation of the mold clamping cylinder 16.
5, and at the forward end position, the toggle mechanism 17~
The mold clamping force is adjusted by rotationally adjusting the mold clamping force adjusting nut 1 via the gear 20 so that when the tie bar 3 is extended by the cylinder force expanded by the cylinder force 19, a predetermined mold clamping force is obtained as a reaction force. It was set.
しかし、この従来装置では、成形機の稼働中に
おけるその熱バランスの変化によりトグル構成部
品等が伸縮し、型締力がタイバー毎に微妙に変化
し、金型全体に一定の型締力が均一に作用しなく
なる。従つて、寸法精度を要求される例えばデイ
スクのような精密製品を成形することができない
という欠点があつた。 However, with this conventional equipment, the toggle components expand and contract due to changes in the heat balance while the molding machine is in operation, causing the mold clamping force to vary slightly from tie bar to tie bar, resulting in a constant mold clamping force uniformly applied to the entire mold. will no longer work. Therefore, there is a drawback that precision products such as disks, which require dimensional accuracy, cannot be molded.
そこで、本出願人は、各タイバーのトグルサポ
ート側端部に型締力調整ナツトを螺合させ、該型
締力調整ナツトをトグルサポートの反型締方向側
部に移動可能に嵌入してシリンダ室を画成し、全
てのシリンダ室に等しい必要内圧を与えて各タイ
バーを伸縮させ、該タイバーにかかる張引力（型
締力）を一定にするようにしたトグル型締装置を
開発し、既に出願を完了している。 Therefore, the present applicant screwed a mold clamping force adjustment nut to the toggle support side end of each tie bar, and movably fitted the mold clamping force adjustment nut to the side opposite to the mold clamping direction of the toggle support. We have developed a toggle mold clamping device that defines a cylinder chamber, applies the same necessary internal pressure to all cylinder chambers, expands and contracts each tie bar, and keeps the tensile force (mold clamping force) applied to the tie bar constant. The application has been completed.
しかしながら、この装置において、シリンダ出
力を大きくするためには型締力調整ナツトの径を
大きくして受圧面積を増大させなければならず、
大きな設置スペースを必要とする。また、型締力
を受ける金型が固定プラテンと可動プラテン間に
ない時や金型厚に適合させてないために金型間を
閉じることができない時（異常時）に作動せさる
と、型締力調整ナツトがストロークエンドまで移
動してしまうから、この型締力調整ナツトが当つ
て損傷しないようにトグルサポートに設けたピス
トンガイドを必要以上に大きな強度にしなければ
ならないといとう不都合を免れない。 However, in this device, in order to increase the cylinder output, it is necessary to increase the diameter of the clamping force adjustment nut to increase the pressure receiving area.
Requires large installation space. In addition, if it is activated when the mold receiving the mold clamping force is not between the fixed platen and the movable platen, or when the gap between the molds cannot be closed because the mold thickness is not adjusted (in an abnormal situation), the mold Since the clamping force adjustment nut moves to the end of its stroke, the piston guide provided on the toggle support must be made stronger than necessary to prevent the mold clamping force adjustment nut from hitting and damaging it, which is an inconvenience. .
（考案の目的）
本考案は、既出願の装置のかかる不都合を解決
するためになされたもので、型締力調整ナツトの
径を大きくすることなく型締力を増加でき、か
つ、異常時にトグルサポート（ピストンガイド）
に大きな力が作用するのを防止できるようにする
ことを目的とする。(Purpose of the invention) The present invention was made in order to solve the above-mentioned disadvantages of the device of the previous application, and it is possible to increase the mold clamping force without increasing the diameter of the mold clamping force adjustment nut, and it can be toggled in the event of an abnormality. Support (piston guide)
The purpose is to prevent large forces from acting on the
（問題点を解決するための手段）
本考案のトグル式型締装置は、タイバーのトグ
ルサポート側端部に型締力調整ナツトを螺合さ
せ、該型締力調整ナツトより型締方向側に一個又
は複数個の押付ピストンを移動可能に嵌合させ、
該押付ピストン及び前記型締力調整ナツトをトグ
ルサポートに移動可能に嵌入して夫々の型締方向
側にシリンダ室を画成すると共に、型締力調整ナ
ツトとの当接状態での押付ピストンのストローク
量を型締力調整ナツトのストローク量より小さく
設定したことを特徴とするものである。(Means for Solving the Problem) The toggle type mold clamping device of the present invention has a mold clamping force adjustment nut screwed onto the toggle support side end of the tie bar, and the mold clamping force adjustment nut is disposed on the mold clamping direction side. one or more pressing pistons are movably fitted;
The pressing piston and the mold clamping force adjusting nut are movably fitted into the toggle support to define cylinder chambers on the mold clamping direction side, and the pressing piston is in contact with the mold clamping force adjusting nut. It is characterized in that the stroke amount is set smaller than the stroke amount of the mold clamping force adjusting nut.
（実施例） 以下本考案の一実施例を第１図で説明する。(Example) An embodiment of the present invention will be described below with reference to FIG.
図中１は型締力調整ナツトで、該型締力調整ナ
ツト１の中間部には係止鍔２が周設されている。
この型締力調整ナツト１は、タイバー３のトグル
サポート４側端部に螺合され、かつ、トグルサポ
ート４の反型締方向側部に移動可能に嵌入される
と共に、トグルサポート４に装着したピストンガ
イド５によつて反型締方向側に外れないように取
付けられている。 In the figure, reference numeral 1 denotes a mold clamping force adjusting nut, and a locking flange 2 is provided around the intermediate portion of the mold clamping force adjusting nut 1.
The mold clamping force adjustment nut 1 is screwed onto the end of the tie bar 3 on the toggle support 4 side, is movably fitted into the side of the toggle support 4 in the opposite mold clamping direction, and is attached to the toggle support 4. It is attached by a piston guide 5 so as not to come off in the opposite direction to the mold clamping direction.
６は第２シリンダ室で、型締力調整ナツト１が
トグルサポート４に嵌入されて該型締力調整ナツ
ト１の周りでかつ係止鍔２の型締方向側に画成さ
れている。 Reference numeral 6 denotes a second cylinder chamber, into which the mold clamping force adjusting nut 1 is fitted into the toggle support 4, and is defined around the mold clamping force adjusting nut 1 and on the mold clamping direction side of the locking collar 2.
７は一個又は複数個の押付ピストン（実施例で
は一個）で、タイバー３のトグルサポート４側端
部の型締力調整ナツト１より型締方向側に移動可
能に嵌合され、トグルサポート４に移動可能に嵌
入されている。 Reference numeral 7 denotes one or more pressing pistons (one in the embodiment), which is fitted so as to be movable in the mold clamping direction from the mold clamping force adjustment nut 1 at the end of the toggle support 4 of the tie bar 3, and It is movably inserted.
８は第１シリンダ室で、押付ピストン７がトグ
ルサポート４に嵌入されて該押付ピストン７の型
締方向側に画成されている。 Reference numeral 8 denotes a first cylinder chamber in which the pressing piston 7 is fitted into the toggle support 4 and defined on the side of the pressing piston 7 in the mold clamping direction.
９はピストン受壁で、型締力調整ナツト１と押
付ピストン７がトグルサポート４に嵌入されて該
トグルサポート４の押付ピストン７より反型締方
向側に形成されている。 Reference numeral 9 denotes a piston receiving wall, into which the mold clamping force adjusting nut 1 and the pressing piston 7 are fitted into the toggle support 4, and is formed on the opposite side of the pressing piston 7 of the toggle support 4.
押付ピストン７はタイバー３に沿つて移動して
型締力調整ナツト１と当接可能で、当接した後型
締力受壁９に当たるまでの押付ピストン７のスト
ローク量l1とピストンガイド５に当たるまでの型
締力調整ナツト１のストローク量l2との関係は
l1＜l2
に設定されている。 The pressing piston 7 can move along the tie bar 3 and come into contact with the mold clamping force adjusting nut 1, and after making contact, the stroke amount l1 of the pressing piston 7 until it hits the mold clamping force receiving wall 9 and the piston guide 5. The relationship between the stroke amount l 2 of the mold clamping force adjustment nut 1 and the relationship between l 1 and l 2 is set to l 1 <l 2 .
前記シリンダ室６，８にはトグルサポート内流
路１０及び配管を介して同一の油圧源が接続され
ている。 The same hydraulic power source is connected to the cylinder chambers 6 and 8 via a toggle support internal flow path 10 and piping.
（作用）
型締め完了状態において、第１シリンダ室８内
と第２シリンダ室６内に同一圧力の油圧を供給す
ると、各タイバー１毎に設けた型締力調整ナツト
１は受圧面積×圧力の同一の力で反型締方向側に
押され、各タイバー３が伸縮するから、各タイバ
ー３にかかる引張力（型締力）を一定にすること
が可能になる。(Function) When the same pressure of hydraulic pressure is supplied to the first cylinder chamber 8 and the second cylinder chamber 6 in the mold clamping completed state, the mold clamping force adjustment nut 1 provided for each tie bar 1 is adjusted to the pressure receiving area x pressure. Since each tie bar 3 expands and contracts by being pushed in the opposite direction to the mold clamping direction by the same force, it becomes possible to keep the tensile force (mold clamping force) applied to each tie bar 3 constant.
この型締力調整ナツト１はタイバー３と螺合し
ているためトグルサポート４に対するずれ量は大
きくないが、押付ピストン７は受圧面積×圧力の
力でタイバー３に沿つて反型締方向側に大きく移
動するから、押付ピストン７は型締力調整ナツト
１と当接し、しかる後該型締力調整ナツト１を反
型締方向側に押付け移動させる。このため、押付
ピストン７の押付力が型締力調整ナツト１による
タイバー伸長力（型締力）に加わることになり、
タイバー３に沿つて設けた押付シリンダ７，８の
段数が多い程大きな型締力が得られる。 Since the mold clamping force adjusting nut 1 is screwed into the tie bar 3, the amount of deviation with respect to the toggle support 4 is not large, but the pressing piston 7 moves along the tie bar 3 in the anti-mold clamping direction by multiplying the pressure receiving area by the pressure force. Because of the large movement, the pressing piston 7 comes into contact with the mold clamping force adjusting nut 1, and then presses and moves the mold clamping force adjusting nut 1 in the opposite direction to the mold clamping direction. Therefore, the pressing force of the pressing piston 7 is added to the tie bar extension force (mold clamping force) by the mold clamping force adjustment nut 1.
The greater the number of stages of pressing cylinders 7 and 8 provided along the tie bars 3, the greater the mold clamping force can be obtained.
しかしながら、押付ピストン７が反型締方向側
に移動して型締力調整ナツト１と当接しこれをl1
だけ移動させた後は、押付ピストン７がピストン
受壁９に当つて該押付ピストン７の押付力がピス
トン受壁９が受けられることになり、以降タイバ
ー３にかかる引張力（型締力）は型締力調整ナツ
ト１のみによつて与えられる。 However, the pressing piston 7 moves in the anti-mold clamping direction and comes into contact with the mold clamping force adjusting nut 1, causing l 1
After the pressing piston 7 is moved by the amount, the pressing piston 7 hits the piston receiving wall 9, and the pressing force of the pressing piston 7 is received by the piston receiving wall 9. From then on, the tensile force (clamping force) applied to the tie bar 3 is The mold clamping force is provided only by the adjusting nut 1.
異常時には、見掛け上、トグルサポート４に対
してタイバー３が反型締方向側に大きく移動する
ことによつて、押付ピストン７がピストン受壁９
に直ちに当たるから、タイバー３にかかる引張力
（型締力）は型締力調整ナツト１のみによつて与
えられ、大きな型締力は生じない。 In the event of an abnormality, the tie bar 3 apparently moves largely in the anti-mold clamping direction with respect to the toggle support 4, causing the pressing piston 7 to move against the piston receiving wall 9.
Therefore, the tensile force (mold clamping force) applied to the tie bar 3 is applied only by the mold clamping force adjusting nut 1, and no large mold clamping force is generated.
（考案の効果）
以上の通り、本考案は、型締力調整ナツトを反
型締方向に移動させる調整シリンダと、型締力調
整ナツトの移動力をあるストローク範囲内で増大
させる一段又は複数段の押付シリンダとの共働に
よつて、型締力調整ナツトの径を大きくすること
なく型締力を確実に増加させることができる。ま
た、異常時には押付シリンダがストローク限位置
でトグルサポートに支持されて型締力が小さくな
るから、型締力調整ナツトによるピストンガイド
等の損傷が生じない程度にトグルサポートを補強
すれば済む。(Effect of the invention) As described above, the present invention includes an adjustment cylinder that moves the mold clamping force adjustment nut in the anti-mold clamping direction, and one or more stages that increases the moving force of the mold clamping force adjustment nut within a certain stroke range. By working together with the pressing cylinder, the mold clamping force can be reliably increased without increasing the diameter of the mold clamping force adjusting nut. Furthermore, in the event of an abnormality, the pressing cylinder is supported by the toggle support at the stroke limit position and the mold clamping force is reduced, so it is only necessary to reinforce the toggle support to the extent that the piston guide etc. are not damaged by the mold clamping force adjustment nut.
第１図は本考案の一実施例を示す概略的断面
図、第２図、第３図は従来例の全体図、要部断面
図である。
１……型締力調整ナツト、２……係止鍔、３…
…タイバー、４……トグルサポート、５……ピス
トンガイド、６……第１シリンダ室、７……押付
ピストン、８……第２シリンダ室、９……ピスト
ン受壁。
FIG. 1 is a schematic sectional view showing an embodiment of the present invention, and FIGS. 2 and 3 are an overall view and a sectional view of essential parts of a conventional example. 1... Mold clamping force adjustment nut, 2... Locking collar, 3...
... Tie bar, 4 ... Toggle support, 5 ... Piston guide, 6 ... First cylinder chamber, 7 ... Pressing piston, 8 ... Second cylinder chamber, 9 ... Piston receiving wall.
Claims (1)
ナツトを螺合させ、該型締力調整ナツトより型締
方向側に一個又は複数個の押付ピストンを移動可
能に嵌合させ、該押付ピストン及び前記型締力調
整ナツトをトグルサポートに移動可能に嵌入して
夫々の型締方向側にシリンダ室を画成すると共
に、型締力調整ナツトとの当接状態での押付ピス
トンのストローク量を型締力調整ナツトのストロ
ーク量より小さく設定したことを特徴とするトグ
ル式型締装置。 A mold clamping force adjustment nut is screwed onto the toggle support side end of the tie bar, one or more pressing pistons are fitted movably in the mold clamping direction side from the mold clamping force adjustment nut, and the pressing piston and the The mold clamping force adjustment nut is movably fitted into the toggle support to define a cylinder chamber on each side in the mold clamping direction, and the stroke amount of the pressing piston in the state of contact with the mold clamping force adjustment nut is adjusted to clamp the mold. A toggle type mold clamping device characterized by being set smaller than the stroke amount of a force adjustment nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11809487U JPH0422972Y2 (en) | 1987-07-31 | 1987-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11809487U JPH0422972Y2 (en) | 1987-07-31 | 1987-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6422416U JPS6422416U (en) | 1989-02-06 |
| JPH0422972Y2 true JPH0422972Y2 (en) | 1992-05-27 |
Family
ID=31362147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11809487U Expired JPH0422972Y2 (en) | 1987-07-31 | 1987-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0422972Y2 (en) |
-
1987
- 1987-07-31 JP JP11809487U patent/JPH0422972Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6422416U (en) | 1989-02-06 |
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