JPH0753402B2 - Injection compression molding method - Google Patents
Injection compression molding methodInfo
- Publication number
- JPH0753402B2 JPH0753402B2 JP15098086A JP15098086A JPH0753402B2 JP H0753402 B2 JPH0753402 B2 JP H0753402B2 JP 15098086 A JP15098086 A JP 15098086A JP 15098086 A JP15098086 A JP 15098086A JP H0753402 B2 JPH0753402 B2 JP H0753402B2
- Authority
- JP
- Japan
- Prior art keywords
- die plate
- mold
- moving
- moving die
- pressure
- 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 - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims description 10
- 239000007924 injection Substances 0.000 title claims description 10
- 238000000748 compression moulding Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 8
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 238000000465 moulding Methods 0.000 description 4
- 239000012768 molten material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
-
- 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
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
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)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は圧縮代を成形条件に合せて容易に対応しうる射
出圧縮成形用の型締方法に関する。Description: TECHNICAL FIELD The present invention relates to a mold clamping method for injection compression molding, in which the compression allowance can be easily adjusted according to the molding conditions.
この種の従来の型締装置の一例を第３図により述べる。 An example of a conventional mold clamping device of this type will be described with reference to FIG.
型開閉装置１の固定金型６を取付た固定ダイプレート２
に対し、移動金型５を取付た移動ダイプレート４を型締
シリンダ７により進退させ、金型５および６の開閉を行
うようになっており、成形に際し、予め圧縮代を残して
型閉じを行い、金型キャビティ14内に樹脂を充填し、続
いて金型キャビティ内に充填された樹脂が所定の容積に
縮少されるよう、型締シリンダ７により前記圧縮代を圧
縮するようになっている。前記金型５および６の金型接
合部には、圧縮代を決めるウエッジ８が設けてあり、移
動シリンダ９により圧縮寸法を変えるべく金型５および
６の移動方向に対し、直角方向に進退するようになって
いる。従って型締め時の圧縮代はウエッジ８の金型の接
合部に押込まれている部分の厚さにより決定される。な
おピストン10の後退位置は調整ネジ11により調整する。
12は金型の注入口へ溶融した原料樹脂を注入するノズ
ル、13は前記ノズル内に設けられた逆流防止弁である。Fixed die plate 2 to which fixed mold 6 of mold opening / closing device 1 is attached
On the other hand, the movable die plate 4 to which the movable die 5 is attached is moved back and forth by the mold clamping cylinder 7 to open and close the dies 5 and 6, and at the time of molding, a mold allowance is left in advance to close the mold. Then, the mold cavity 14 is filled with the resin, and subsequently, the compression allowance is compressed by the mold clamping cylinder 7 so that the resin filled in the mold cavity is reduced to a predetermined volume. There is. A wedge 8 that determines a compression margin is provided at the mold joint portion of the molds 5 and 6, and moves forward and backward in a direction perpendicular to the moving direction of the molds 5 and 6 in order to change the compression dimension by the moving cylinder 9. It is like this. Therefore, the compression margin at the time of mold clamping is determined by the thickness of the portion of the wedge 8 which is pressed into the joint portion of the mold. The retracted position of the piston 10 is adjusted by the adjusting screw 11.
12 is a nozzle for injecting the molten raw material resin into the injection port of the mold, and 13 is a check valve provided in the nozzle.
前述した従来例の動作を述べると、先づ、図の上半に示
す様に目的とする成形品の厚さＡより収縮等を見込んだ
分だけ大きなＢの値になるようウエッジ８の位置を決め
た上で、型締めシリンダ７により移動ダイプレート４を
前進（図中右進する）させ、溶融した原料樹脂を注入口
３から低圧にて金型キャビティ14内へ充満させる。次に
図の下半分に示すように、製品の厚さが目的とする寸法
Ａに縮少されるように調整ネジ11で決められた位置に、
ピストン10によりウエッジ８の位置を変え、注入口３か
らの溶融した原料樹脂の逆流を防いだ上で、再度移動金
型５を型締シリンダ７により大きな閉鎖力で押圧する。
これにより金型キャビティ14内の原料樹脂は、均一で、
高い圧力を受けて緻密にキャビティ内に充満されながら
冷却固化される。次に移動ダイプレート４を後退すれば
成形品を金型から取出すことができる。The operation of the above-mentioned conventional example will be described. First, as shown in the upper half of the figure, the position of the wedge 8 is set so that the value of B is larger than the thickness A of the target molded product in consideration of shrinkage and the like. After determining, the moving die plate 4 is moved forward (moved to the right in the figure) by the mold clamping cylinder 7 to fill the molten material resin into the mold cavity 14 from the injection port 3 at a low pressure. Next, as shown in the lower half of the figure, at the position determined by the adjusting screw 11 so that the product thickness is reduced to the target dimension A,
The position of the wedge 8 is changed by the piston 10 to prevent the molten material resin from flowing back from the injection port 3, and then the moving mold 5 is pressed again by the mold clamping cylinder 7 with a large closing force.
As a result, the raw material resin in the mold cavity 14 is uniform,
It is cooled and solidified while receiving high pressure and densely filling the cavity. Next, if the movable die plate 4 is retracted, the molded product can be taken out from the mold.
しかしながら、前述の方法は圧縮代の設定，調整に機械
的ストッパを使用する方法であり、構造が複雑となるば
かりでなく成形条件と対応して、即座に、圧縮代を調整
することが不可能であり、その都度、機械を停止させて
行う煩わしさがある。However, the above method uses a mechanical stopper to set and adjust the compression allowance, which not only complicates the structure but also makes it impossible to immediately adjust the compression allowance according to the molding conditions. Therefore, there is the trouble of stopping the machine each time.
本発明は前述のような欠点を取除き、構造が簡単でしか
も成形条件に対応して、即座に、圧縮代を調整すること
が出来る射出圧縮成形用の型締方法を提供することを目
的とする。It is an object of the present invention to provide a mold clamping method for injection compression molding which eliminates the above-mentioned drawbacks, has a simple structure, and can immediately adjust the compression allowance in accordance with molding conditions. To do.
発明者等は前述の目的を達成するため、移動金型の固定
金型に対する距離を位置検出器により検出し、その検出
値が、予め、設定した金型の所定圧縮代を検出した時、
移動ダイプレートに取付けられ、圧油の供給又は供給停
止を行って、移動ダイプレートをタイバー上の任意の位
置に、移動又は締着可能にする圧力締着器により、移動
ダイプレートを停止させ、次いで金型内に溶融樹脂の充
填を行い、充填中は充填完了後に、前記圧力締着器に対
する圧油の供給を行って、移動ダイプレートを移動可能
にするとともに、前記所定圧縮代の圧縮を行うこととし
た。In order to achieve the above-mentioned object, the inventors have detected the distance of the movable mold with respect to the fixed mold by a position detector, and the detected value is preset when a predetermined compression margin of the mold is detected,
The moving die plate is attached to the moving die plate, and by supplying or stopping the supply of pressure oil, the moving die plate is stopped by a pressure fastening device that enables the moving die plate to be moved or fastened to any position on the tie bar, Next, the molten resin is filled in the mold, and during the filling, after the filling is completed, the pressure oil is supplied to the pressure clamp to make the movable die plate movable and to compress the predetermined compression margin. I decided to do it.
射出圧縮成形にあたり、圧力締着器に圧油を供給すると
タイバーと係合している内径面の径が拡がり、タイバー
との間に小間隙を形成し、移動ダイプレートを摺動可能
にし、供給を停止すると前記内径面がタイバーを締り状
態とするので、移動ダイプレートの移動が不可能とな
る。In injection compression molding, when pressure oil is supplied to the pressure fastener, the diameter of the inner diameter surface that engages with the tie bar expands, forming a small gap with the tie bar, making the movable die plate slidable, and supplying it. When the step is stopped, the inner diameter surface closes the tie bar, so that the moving die plate cannot be moved.
この締着器を利用して圧縮成形を行う。Compression molding is performed using this fastener.
次に第１図および第２図に例示するところ従って本発明
の方法に使用する装置および動作について説明する。The apparatus and operation used in the method of the present invention will now be described with reference to FIGS. 1 and 2.
なお、本発明は従来例第３図のウエッジ８およびウエッ
ジを移動させる移動用シリンダ９に代って、圧力締着器
16を移動ダイプレート４に設けるとともに移動ダイプレ
ート４の位置、従って移動金型の位置を検出する位置検
出器17を固定ダイプレート２に設けた、他は前述の従来
例と変らないため説明は省略し、変った部分のみ説明す
る。In the present invention, a pressure fastener is used instead of the wedge 8 and the moving cylinder 9 for moving the wedge shown in FIG.
16 is provided on the movable die plate 4, and a position detector 17 for detecting the position of the movable die plate 4, and thus the position of the movable die, is provided on the fixed die plate 2. Omit it and only the changed part will be explained.
前記圧力締着器16は第２図に詳細で示すように、内径面
に螺旋状の溝18を有する金属製のスリーブ19と、ボルト
20により移動ダイプレート４へ固着された両端のフラン
ジ21とからなり、フランジ21には前記溝18に通ずる圧油
の注入口22が設けてある。同注入口22には図示していな
い圧油源等から圧油が供給されるようになっていて、前
記スリーブ19はタイバー15に対し、注入口22に圧油の供
給がない時は締りばめの状態になり、移動ダイプレート
４はダイバー15上を移動不可能となる。また圧油を供給
するとスリーブ19は円周方向へ拡大され、スリーブ19と
タイバー15との間に空隙を生じ、移動ダイプレート４は
ダイパー15に対して摺動可能になる。As shown in detail in FIG. 2, the pressure fastener 16 includes a metallic sleeve 19 having a spiral groove 18 on an inner diameter surface thereof, and a bolt.
It is composed of flanges 21 at both ends fixed to the movable die plate 4 by 20, and the flange 21 is provided with a pressure oil injection port 22 communicating with the groove 18. Pressure oil is supplied to the inlet 22 from a pressure oil source or the like (not shown), and the sleeve 19 is tightened with respect to the tie bar 15 when pressure oil is not supplied to the inlet 22. Then, the movable die plate 4 cannot move on the diver 15. Further, when pressure oil is supplied, the sleeve 19 is expanded in the circumferential direction, a gap is created between the sleeve 19 and the tie bar 15, and the movable die plate 4 becomes slidable with respect to the die par 15.
位置検出器17は例えば、磁気スケール又はポテンショメ
ータ等により移動ダイプレートの移動位置又は距離を検
出し、圧力締着器16に作用する油圧源にフィードバック
し、圧油の供給又は停止を行うようになっている。The position detector 17 detects, for example, the moving position or distance of the moving die plate by a magnetic scale or a potentiometer, and feeds it back to the hydraulic pressure source acting on the pressure fastener 16 to supply or stop the pressure oil. ing.
以上説明したような構成となっており、次に本発明の動
作について説明すると、移動ダイプレート４を型締シリ
ンダ７によって移動させ、金型部に所定の圧縮代δ（数
mm）になった所で位置検出器17のフィードバック信号に
より型締シリンダ７を停止させると共に移動ダイプレー
ト４を圧力締着器16により、圧油を開放してダイバー15
にロックする。次いで溶融樹脂を金型キャビティ14内に
充填した後、再び、前記圧力締着器16に圧油を供給する
とともに型締シリンダ７により圧縮代δを圧縮し、金型
キャビティ内の溶積を縮少させる。The structure as described above is explained. Next, the operation of the present invention will be described. The movable die plate 4 is moved by the mold clamping cylinder 7, and a predetermined compression allowance δ (number
mm), the mold clamping cylinder 7 is stopped by the feedback signal of the position detector 17, and the moving die plate 4 is released by the pressure fastener 16 to release the pressure oil and the diver 15
Lock to. Next, after the molten resin is filled in the mold cavity 14, pressure oil is supplied to the pressure clamp 16 again and the compression margin δ is compressed by the mold clamping cylinder 7 to reduce the molten product in the mold cavity. Reduce.
以上説明したように型締工程中の移動ダイプレートに対
し圧力締着器に圧油を供給したり、供給停止することに
より移動ダイプレートの移動を自在に制御出来るので、
圧縮代を射出成形条件に応じ、その都度、設定可能にす
る。従って当初に掲げた欠点が取除かれる。As described above, it is possible to freely control the movement of the moving die plate by supplying pressure oil to the pressure clamp to the moving die plate during the mold clamping process, or by stopping the supply.
The compression allowance can be set each time according to the injection molding conditions. Therefore, the drawbacks listed at the beginning are eliminated.
第１図および第２図は本発明の一実施例を示し、第１図
は型締装置の横断面図。第２図は第１図の“イ”部分の
詳細図である。第３図は従来装置の図で、型締装置の横
断面図である。 １……型開閉機、２……固定ダイプレート ４……移動ダイプレート、５……移動金型、 ６……固定金型、７……型締シリンダ、 16……圧力締着器、17……位置検出器。1 and 2 show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of a mold clamping device. FIG. 2 is a detailed view of a portion "a" in FIG. FIG. 3 is a view of a conventional device, which is a cross-sectional view of the mold clamping device. 1 ... Mold opener, 2 ... Fixed die plate 4 ... Moving die plate, 5 ... Moving die, 6 ... Fixed die, 7 ... Mold clamping cylinder, 16 ... Pressure clamp, 17 ...... Position detector.
Claims (1)
た上で移動金型を停止して、金型内へ溶融樹脂の射出を
行った後、再び移動金型を移動して圧縮成形する射出圧
縮成形方法に於て、移動金型の固定金型に対する距離を
位置検出器により検出し、その検出値が、予め、設定し
た金型の所定圧縮代を検出した時、移動ダイプレートに
取付けられ、圧油の供給又は供給停止を行って、移動ダ
イプレートをタイバー上の任意の位置に、移動又は締着
可能にする圧力締着器により、移動ダイプレートを停止
させ、次いで金型内に溶融樹脂の充填を行い、充填中又
は充填完了後に、前記圧力締着器に対する圧油の供給を
行って、移動ダイプレートを移動可能にするとともに、
前記所定圧縮代の圧縮を行うことを特徴とする射出圧縮
成形方法。1. A moving die is moved again after a compression margin is provided between the moving die and a fixed die, the moving die is stopped, a molten resin is injected into the die. In the injection compression molding method for compression molding, the position detector detects the distance of the moving mold with respect to the fixed mold, and when the detected value detects a predetermined compression margin of the mold set in advance, The moving die plate is attached to the moving die plate, and by supplying or stopping the supply of pressure oil, the moving die plate is stopped by a pressure fastening device that enables the moving die plate to be moved or fastened to any position on the tie bar, Next, the molten resin is filled in the mold, and during or after the filling is completed, pressure oil is supplied to the pressure fastener, and the movable die plate can be moved,
An injection compression molding method, characterized in that the predetermined compression margin is compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15098086A JPH0753402B2 (en) | 1986-06-27 | 1986-06-27 | Injection compression molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15098086A JPH0753402B2 (en) | 1986-06-27 | 1986-06-27 | Injection compression molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS635919A JPS635919A (en) | 1988-01-11 |
| JPH0753402B2 true JPH0753402B2 (en) | 1995-06-07 |
Family
ID=15508655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15098086A Expired - Fee Related JPH0753402B2 (en) | 1986-06-27 | 1986-06-27 | Injection compression molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753402B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2628357B2 (en) * | 1988-10-31 | 1997-07-09 | 株式会社小松製作所 | Mold clamping device for injection press and control method therefor |
| JP2936379B2 (en) * | 1994-04-20 | 1999-08-23 | 日精樹脂工業株式会社 | Mold clamping method of injection compression molding machine |
-
1986
- 1986-06-27 JP JP15098086A patent/JPH0753402B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS635919A (en) | 1988-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |