JPH02172711A - Friction clamp type mold clamping device for molding machine - Google Patents
Friction clamp type mold clamping device for molding machineInfo
- Publication number
- JPH02172711A JPH02172711A JP32764188A JP32764188A JPH02172711A JP H02172711 A JPH02172711 A JP H02172711A JP 32764188 A JP32764188 A JP 32764188A JP 32764188 A JP32764188 A JP 32764188A JP H02172711 A JPH02172711 A JP H02172711A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- mold clamping
- sleeve
- ram
- clamping
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
- B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement
- B29C45/6714—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding 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、射出成形機等の成形機における摩擦クランプ
式型締装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a friction clamp type mold clamping device for a molding machine such as an injection molding machine.
［従来の技術］
第３図に示す従来の摩擦クランプ式型締装置は、型開閉
シリンダ３３により上下動される可動盤３１に一体的に
設けた型締シリンダ３７内に中空複動ピストン３５配設
し、さらに該中空複動ピストン３５内に設けた径方向に
弾性変形可能なスリーブ３６をタイロッド３４に嵌合し
、前記スリーブ３６の径方向の弾性力に対抗する向きの
油圧を作用させることにより、前記スリーブ３６を弾性
変形させて前記スリーブ３６をタイロッド３４に対して
クランプまたはクランプ解除を行なわせる。そして、前
記クランプ時における油圧による反力および型締時の型
締力による反力（以下、「型締力等の反力」という。）
は、中空複動ピストン３５の上・下端部にそれぞれ設け
られたブツシュホルダ３８ａ、３８ｂと中空複動ピスト
ン３５との結合部で受けるものである（特開昭６２−６
２７２３号公報参照）。[Prior Art] The conventional friction clamp type mold clamping device shown in FIG. Further, a radially elastically deformable sleeve 36 provided in the hollow double-acting piston 35 is fitted to the tie rod 34, and hydraulic pressure is applied in a direction that opposes the radial elastic force of the sleeve 36. As a result, the sleeve 36 is elastically deformed to clamp or unclamp the sleeve 36 to the tie rod 34. Then, the reaction force due to hydraulic pressure during clamping and the reaction force due to mold clamping force during mold clamping (hereinafter referred to as "reaction force such as mold clamping force").
are received at the joints between the hollow double-acting piston 35 and bush holders 38a and 38b provided at the upper and lower ends of the hollow double-acting piston 35 (Japanese Patent Laid-Open No. 62-6
(See Publication No. 2723).
［発明が解決しようとする課題］
上記従来の型締装置は、型締力等の反力をブツシュホル
ダと中空複動ピストンとの結合部で受けるため、該結合
部の結合強度を前記型締力等の反力に十分に耐え得る強
さに設定する必要がある。そのため、ブツシュホルダが
大型化し、ひいては型締装置の全高（全長）が高く（長
く）なって型締装置の重量も増大するという問題点があ
った。[Problems to be Solved by the Invention] The conventional mold clamping device described above receives a reaction force such as a mold clamping force at the joint between the bush holder and the hollow double-acting piston, so the joint strength of the joint is determined by the mold clamping force. It is necessary to set the strength to be strong enough to withstand reaction forces such as. Therefore, there was a problem that the bush holder became larger and the overall height (length) of the mold clamping device became higher (longer) and the weight of the mold clamping device also increased.
本発明は、上記従来の技術の有する問題点に鑑みてなさ
れたものであり、型締装置の全高を低くして型締装置を
軽量化した成形機の摩擦クランプ式型締装置を提供する
ことを目的としている。The present invention has been made in view of the problems of the above-mentioned conventional techniques, and provides a friction clamp type mold clamping device for a molding machine that reduces the overall height of the mold clamping device and reduces the weight of the mold clamping device. It is an object.
〔課題を解決するための手段〕
上記目的を達成するため、本発明の型締装置は、固定盤
および該固定盤に突設されたタイロッドに案内されて型
開閉手段によって移動される可動盤を備え、該可動盤に
一体的に設けた型締シリンダ内に中空の型締ラムを配設
し、該型締ラム内に挿入した径方向に弾性変形自在なス
リーブと前記型締ラムとを、これらのほぼ全長にわたっ
て形成されたねじ部により結合して、該ねじ部に生じた
螺旋状の間隙によってクランプ圧力室を形成し、さらに
、前記スリーブを前記タイロッドに滑動自在に遊嵌した
ものである。[Means for Solving the Problem] In order to achieve the above object, the mold clamping device of the present invention includes a fixed platen and a movable platen that is guided by a tie rod protruding from the fixed platen and moved by a mold opening/closing means. A hollow mold clamping ram is disposed in a mold clamping cylinder integrally provided on the movable platen, and a radially elastically deformable sleeve inserted into the mold clamping ram and the mold clamping ram, These are connected by a threaded portion formed over almost the entire length thereof, a spiral gap formed in the threaded portion forms a clamp pressure chamber, and the sleeve is slidably fitted loosely into the tie rod. .
また、型締ラムに半径方向の貫通孔を形成し、該貫通孔
に先端部がスリーブに係合する位置決めピンを装着する
と効果的である。Furthermore, it is effective to form a radial through hole in the mold clamping ram and to attach a positioning pin whose tip end engages with the sleeve to the through hole.
［作 用］
クランプ圧力室に圧力流体を供給しない状態では、スリ
ーブとタイロッドとの間に間隙が生じ、スリーブはタイ
ロッドの軸方向に摺動自在である。この状態で型開閉手
段により、可動盤を固定盤方向へ移動させて型閉じがな
される前の所定位置に移動させたのち、クランプ圧力室
に圧力流体を供給し、スリーブを径方向に弾性変形させ
て、その内周面をタイロッド外周面と当接させることに
より摩擦力によりクランプする。ついで、型締シリンダ
に型締め方向の流体圧を作用させると型締ラムはタイロ
ッドにクランプされて固定されているスリーブとともに
タイロッドに対して固定された状態にあるので、可動盤
が固定盤方向へ移動されて型締力が発生し、強力な型締
な行なう。この型締力による反力は型締ラムを反固定盤
方向へ移動させる方向に作用するが、この反力はスリー
ブと型締ラムとの前記ねじ部の全当接面で受は止められ
るので、スリーブの応力は分散されて集中することがな
くなる。[Function] When no pressure fluid is supplied to the clamp pressure chamber, a gap is created between the sleeve and the tie rod, and the sleeve is slidable in the axial direction of the tie rod. In this state, the mold opening/closing means moves the movable platen toward the fixed platen and moves it to a predetermined position before the mold is closed, and then supplies pressure fluid to the clamp pressure chamber to elastically deform the sleeve in the radial direction. Then, by bringing the inner circumferential surface into contact with the outer circumferential surface of the tie rod, the tie rod is clamped by frictional force. Next, when fluid pressure in the mold clamping direction is applied to the mold clamping cylinder, the mold clamping ram is fixed to the tie rod together with the sleeve that is clamped and fixed to the tie rod, so the movable platen moves toward the fixed platen. The mold is moved and a mold clamping force is generated, resulting in strong mold clamping. The reaction force due to this mold clamping force acts in the direction of moving the mold clamping ram away from the stationary platen, but this reaction force is stopped by the entire contact surface of the threaded part of the sleeve and mold clamping ram. , the stress in the sleeve is dispersed and no longer concentrated.
〔実施例］ 本発明の実施例を図面に基づき説明する。〔Example] Embodiments of the present invention will be described based on the drawings.
第１図に示すように、固定盤３に突設されたタイロッド
４には、可動盤２を型締装置１を介して移動可能に設け
、該可動盤２を型開閉手段である型開閉シリンダ５によ
り固定盤方向または反固定盤方向へ移動させて型閉じま
たは型開きを行なう。なお、図中２ａは可動盤２に取付
けた可動型であり、３ａは固定盤３に取付けた固定型で
ある。As shown in FIG. 1, a tie rod 4 protruding from a fixed platen 3 is provided with a movable platen 2 movably via a mold clamping device 1, and the movable platen 2 is connected to a mold opening/closing cylinder which is a mold opening/closing means. 5, the mold is closed or opened by moving toward or away from the fixed plate. In the figure, 2a is a movable type attached to the movable platen 2, and 3a is a fixed type attached to the fixed platen 3.
第２図は前記型締装置ｌの詳細を示し、可動盤２に一体
的に形成されたシリンダ１２内に中空の型締ラム１１を
配設し、該型締ラム１１の内周面に形成した雌ねじ部１
１ａとスリーブ１０の外周面に形成した雄ねじ部１０ａ
とを螺合することにより結合されている。これにより、
雄ねじ部１０ａの山部と雌ねじ部１１ａの谷部との間に
は螺旋状の間隙１９が生じ、この間隙１９の適宜部位に
圧力発生源としての図示しない油圧ポンプ等からの圧力
流体を供給するための導入孔１５を設けることによりク
ランプ圧力室が構成されている。一方、前記シリンダ１
２の上部開口部にはカバー１６を複数のボルト１６ａに
より固着し、シリンダ１２の下部のタイロッド４が嵌挿
されている開口部にはブツシュ１８を複数のボルト１８
ａにより固着し、型締ラム１１のピストン部１１ｂを挾
んで反固定盤側に型開圧力室１３が、また固定盤側に型
締圧力室１４がそれぞれ形成されており、型開圧力室１
３の供給孔１３ａまたは型締圧力室１４の供給孔１４ａ
にそれぞれ圧力流体を供給することにより型開きまたは
型締を行なう。FIG. 2 shows details of the mold clamping device 1, in which a hollow mold clamping ram 11 is disposed within a cylinder 12 formed integrally with the movable platen 2, and a mold clamping ram 11 is formed on the inner peripheral surface of the mold clamping ram 11. female thread part 1
1a and a male threaded portion 10a formed on the outer peripheral surface of the sleeve 10.
They are connected by screwing them together. This results in
A spiral gap 19 is formed between the peak of the male threaded portion 10a and the valley of the female threaded portion 11a, and pressure fluid is supplied from a hydraulic pump or the like (not shown) as a pressure generation source to an appropriate portion of this gap 19. A clamp pressure chamber is constituted by providing an introduction hole 15 for this purpose. On the other hand, the cylinder 1
A cover 16 is fixed to the upper opening of the cylinder 12 with a plurality of bolts 16a, and a bushing 18 is fixed to the opening of the lower part of the cylinder 12 into which the tie rod 4 is inserted.
a, and a mold opening pressure chamber 13 is formed on the side opposite to the stationary plate, sandwiching the piston part 11b of the mold clamping ram 11, and a mold clamping pressure chamber 14 is formed on the stationary plate side.
3 supply hole 13a or mold clamping pressure chamber 14 supply hole 14a
The mold is opened or clamped by supplying pressure fluid to each.
次に本実施例の動作について説明する。Next, the operation of this embodiment will be explained.
型開きした状態から第１図に示す型開閉シリンダ５を作
動させて可動盤２を固定盤３の方向へ移動させて型閉じ
前の所定位置に移動させる。そして第２図に示す前記間
隙１９へ導入孔１５より圧油を供給すると、スリーブ１
０はその径方向に弾性変形により収縮され、その内周面
とタイロッド４の外周面とが強く当接されることによっ
て摩擦力によりクランプされる。When the mold is opened, the mold opening/closing cylinder 5 shown in FIG. 1 is operated to move the movable platen 2 toward the fixed platen 3 to a predetermined position before closing the mold. When pressure oil is supplied from the introduction hole 15 to the gap 19 shown in FIG. 2, the sleeve 1
0 is contracted in the radial direction by elastic deformation, and the inner peripheral surface of the tie rod 4 is brought into strong contact with the outer peripheral surface of the tie rod 4, thereby being clamped by frictional force.
ついで、型締圧力室１４に供給孔１４ａから圧力流体を
供給すると、前記のようにスリーブ１０とタイロッド４
とがクランプされているため、スリーブｌＯに螺合され
ている型締ラム１１はタイロッド４に固定された状態に
あるから、型締圧力室１４内の圧力は可動盤２を固定盤
３の方向へ移動させるように作用し、可動盤２を固定盤
３の方向へ移動させて強力な型締な行なう。その際、型
締力の反力が型締ラム１１に加わり、型締ラム１１には
反固定盤方向への力が作用するが、この反力はスリーブ
１０と型締ラム１１とを結合しているねじ部１０ａ、ｌ
ｌａの全当接面で受は止めるので、スリーブ１０に生じ
る応力は分散され、従来の技術のような応力集中は起ら
ない。したがって、スリーブの長さおよび厚さは比較的
小さめに設定することが可能となる。Next, when pressure fluid is supplied to the mold clamping pressure chamber 14 from the supply hole 14a, the sleeve 10 and tie rod 4 are
Since the mold clamping ram 11 screwed into the sleeve lO is fixed to the tie rod 4, the pressure inside the mold clamping pressure chamber 14 moves the movable platen 2 toward the fixed platen 3. The movable platen 2 is moved in the direction of the fixed platen 3 to perform strong mold clamping. At this time, a reaction force of the mold clamping force is applied to the mold clamping ram 11, and a force acts on the mold clamping ram 11 in the direction opposite to the fixed plate, but this reaction force connects the sleeve 10 and the mold clamping ram 11. Threaded parts 10a, l
Since the receiver is stopped on the entire contact surface of the sleeve 10, the stress generated in the sleeve 10 is dispersed, and stress concentration does not occur as in the prior art. Therefore, the length and thickness of the sleeve can be set relatively small.
また、型締ラム１１の例えばピストン部１１ｂに貫通孔
１７ａを形成し、該貫通孔１７ａに先端部がスリーブ１
０の外周面に係合する位置決めピン１７を装着すること
もできる。Further, a through hole 17a is formed in, for example, the piston portion 11b of the mold clamping ram 11, and the tip end of the sleeve 1 is inserted into the through hole 17a.
It is also possible to install a positioning pin 17 that engages with the outer circumferential surface of 0.
［発明の効果］
本発明は、上記のとおり構成したので以下に記載するよ
うな効果を奏する。[Effects of the Invention] Since the present invention is configured as described above, the present invention has the following effects.
スリーブの長さおよび厚さを比較的小さめに設定できる
ので型締装置の小型化および軽量化が可能となった。さ
らに、スリーブとタイロッドの締結を所定位置で行なっ
たのち、型締ラムを型締め方向へ移動させる加圧流体の
供給量、圧力を制御して、可動盤の型締速度、型締力の
パターン動作を行なうことができる。Since the length and thickness of the sleeve can be set relatively small, the mold clamping device can be made smaller and lighter. Furthermore, after the sleeve and tie rod are fastened at a predetermined position, the supply amount and pressure of pressurized fluid that moves the mold clamping ram in the mold clamping direction are controlled to control the mold clamping speed of the movable platen and the mold clamping force pattern. can perform actions.
また、位置決めピンにより、スリーブが不用意に回動す
ることがなくなり、ねじ部の結合がゆるむおそれがない
。Moreover, the positioning pin prevents the sleeve from rotating inadvertently, and there is no risk that the connection of the threaded portion will loosen.
第１図は本発明の煩締装置を備えた成形機の正面図、第
２図はその型締装置の主要部の断面図、第３図は従来の
型締装置を備えた成形機の一部断面図である。
１・・・・・・型締装置、 ２・・・・・・可動盤
、２ａ・・・可動型、 ３・・・・・・固定盤、
３ａ・・・固定型、 ４・・・・・・タイロッ
ド、５・・・・・・型開閉シリンダ、 ０・・・・・・
スリーブ、Ｏａ・・・雄ねじ部、 ｌ・・・・・
・型締ラム、１ａ・・・雌ねじ部、 １ｂ・・・
ピストン部、２・・・・・・型締シリンダ、 ３・・
・・・・型開圧力室、４・・・・・・型締圧力室、
３ａ、１４ａ・・・・・・供給孔、５・・・・・・導
入孔、 ６・・・・・・カバー１７・・・・・
・位置決めピン、
１９・・・・・・間隙。
１８・・・・・・ブツシュ、
特許出願人 株式会社日本製鋼所Fig. 1 is a front view of a molding machine equipped with the clamping device of the present invention, Fig. 2 is a sectional view of the main parts of the clamping device, and Fig. 3 is a view of a molding machine equipped with a conventional mold clamping device. FIG. 1...Mold clamping device, 2...Movable plate, 2a...Movable type, 3...Fixed plate,
3a... Fixed type, 4... Tie rod, 5... Type opening/closing cylinder, 0......
Sleeve, Oa...male thread part, l...
・Mold clamping ram, 1a...Female thread part, 1b...
Piston part, 2... Mold clamping cylinder, 3...
... Mold opening pressure chamber, 4... Mold clamping pressure chamber,
3a, 14a...supply hole, 5...introduction hole, 6...cover 17...
・Positioning pin, 19...Gap. 18... Bush, Patent applicant Japan Steel Works, Ltd.
Claims (1)
イロッド（４）に案内されて型開閉手段（５）によって
移動される可動盤（２）を備え、該可動盤（２）に一体
的に設けた型締シリンダ（１２）内に中空の型締ラム（
１１）を配設し、該型締ラム（１１）内に挿入した径方
向に弾性変形自在なスリーブ（１０）と前記型締ラム （１１）とを、これらのほぼ全長にわたって形成された
ねじ部（１０ａ、１１ａ）により結合して、該ねじ部（
１０ａ、１１ａ）に生じた螺旋状の間隙（１９）によっ
てクランプ圧力室を形成し、さらに、前記スリーブ（１
０）を前記タイロッド（４）に滑動自在に遊嵌した成形
機の摩擦クランプ式型締装置。 ２、型締ラム（１１）に半径方向の貫通孔 （１７ａ）を形成し、該貫通孔（１７ａ）に先端部がス
リーブ（１０）に係合する位置決めピン（１７）を装着
した請求項１記載の成形機の摩擦クランプ式型締装置。[Claims] 1. A movable platen (2) guided by a fixed platen (3) and a tie rod (4) protruding from the fixed platen (3) and moved by a mold opening/closing means (5). , a hollow mold clamping ram (
11), and a radially elastically deformable sleeve (10) inserted into the mold clamping ram (11) and the mold clamping ram (11) are connected by a threaded portion formed over almost the entire length thereof. (10a, 11a), and the threaded portion (
A clamping pressure chamber is formed by the spiral gap (19) formed in the sleeve (10a, 11a), and the sleeve (10a, 11a)
0) is slidably and loosely fitted onto the tie rod (4) for a molding machine. 2. Claim 1, wherein a radial through hole (17a) is formed in the mold clamping ram (11), and a positioning pin (17) whose tip end engages with the sleeve (10) is attached to the through hole (17a). Friction clamp type mold clamping device for the described molding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32764188A JPH02172711A (en) | 1988-12-27 | 1988-12-27 | Friction clamp type mold clamping device for molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32764188A JPH02172711A (en) | 1988-12-27 | 1988-12-27 | Friction clamp type mold clamping device for molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02172711A true JPH02172711A (en) | 1990-07-04 |
Family
ID=18201324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32764188A Pending JPH02172711A (en) | 1988-12-27 | 1988-12-27 | Friction clamp type mold clamping device for molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02172711A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5129817A (en) * | 1991-03-11 | 1992-07-14 | Husky Injection Molding Systems Ltd. | Gripper bushing assembly for an apparatus for making plastic articles |
| US5133655A (en) * | 1991-01-07 | 1992-07-28 | Husky Injection Molding Systems Ltd. | Friction clamp for injection molding machine |
| US5370518A (en) * | 1992-01-29 | 1994-12-06 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for injection and compression molding |
| JP2006297863A (en) * | 2005-04-25 | 2006-11-02 | Toyo Mach & Metal Co Ltd | Vertical injection molding machine |
| JP2006297864A (en) * | 2005-04-25 | 2006-11-02 | Toyo Mach & Metal Co Ltd | Vertical injection molding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60157604A (en) * | 1984-01-27 | 1985-08-17 | Hitachi Ltd | Automatic constant speed correcting device |
| JPS60157504A (en) * | 1983-11-18 | 1985-08-17 | エムテイエス・システムス・コ−ポレ−シヨン | Clamp assembly |
-
1988
- 1988-12-27 JP JP32764188A patent/JPH02172711A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60157504A (en) * | 1983-11-18 | 1985-08-17 | エムテイエス・システムス・コ−ポレ−シヨン | Clamp assembly |
| JPS60157604A (en) * | 1984-01-27 | 1985-08-17 | Hitachi Ltd | Automatic constant speed correcting device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133655A (en) * | 1991-01-07 | 1992-07-28 | Husky Injection Molding Systems Ltd. | Friction clamp for injection molding machine |
| JPH06166075A (en) * | 1991-01-07 | 1994-06-14 | Husky Injection Molding Syst Ltd | Friction clamp of injection molding device |
| US5129817A (en) * | 1991-03-11 | 1992-07-14 | Husky Injection Molding Systems Ltd. | Gripper bushing assembly for an apparatus for making plastic articles |
| EP0503584A3 (en) * | 1991-03-11 | 1992-12-23 | Husky Injection Molding Systems Ltd. | Gripper bushing construction |
| JPH0699450A (en) * | 1991-03-11 | 1994-04-12 | Husky Injection Molding Syst Ltd | Clamping device, holding bushing device, and production device for synthetic resin product |
| US5370518A (en) * | 1992-01-29 | 1994-12-06 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for injection and compression molding |
| JP2006297863A (en) * | 2005-04-25 | 2006-11-02 | Toyo Mach & Metal Co Ltd | Vertical injection molding machine |
| JP2006297864A (en) * | 2005-04-25 | 2006-11-02 | Toyo Mach & Metal Co Ltd | Vertical injection molding machine |
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