JPS6135926B2 - - Google Patents
Info
- Publication number
- JPS6135926B2 JPS6135926B2 JP2180781A JP2180781A JPS6135926B2 JP S6135926 B2 JPS6135926 B2 JP S6135926B2 JP 2180781 A JP2180781 A JP 2180781A JP 2180781 A JP2180781 A JP 2180781A JP S6135926 B2 JPS6135926 B2 JP S6135926B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- piston
- mold clamping
- stopper
- stage
- 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
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】
本発明は、例えばトグルリンク機構を有する型
締装置に２段の型締をなさしめて、成形品に２段
の圧縮成形を行わしめんとする射出圧縮成形装置
に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection compression molding apparatus that performs two-stage compression molding on a molded product by performing two-stage mold clamping on a mold clamping device having, for example, a toggle link mechanism. It is something.
射出圧縮成形方法は、高精密度が要求される光
学部品、とくに、成形品内の歪みを極端に嫌うレ
ンズ、ミラーなどの成形品によく用いられるもの
である。 The injection compression molding method is often used for optical components that require high precision, particularly for molded products such as lenses and mirrors that are extremely sensitive to distortion within the molded product.
これは、射出工程中は、固定側と可動側との金
型の間に、所要の型開き量を設けておき、射出完
了後、両金型間のキヤビテイ内の可塑化溶融プラ
スチツク全体を２段に圧縮する、所謂２段型締の
方法が用いられている。 During the injection process, a required amount of mold opening is provided between the molds on the fixed side and the movable side, and after injection is completed, the entire plasticized molten plastic in the cavity between the two molds is A so-called two-stage mold clamping method is used in which the mold is compressed in stages.
この成形方法によると、成形品全体に均等な圧
縮力が作用するので歪みのない成形品が得られ
る。 According to this molding method, a uniform compressive force is applied to the entire molded product, so that a molded product without distortion can be obtained.
これを、従来のトグルリンク機構を有する型締
装置でその射出圧縮成形を行う場合、射出圧縮を
行うために前記型開き量、すなわち両金型間に一
定の隙間を確保して、先ず第１段の型締を行う
が、この第１段型締の終了の確認はリミツトスイ
ツチで行い、その作動により電磁弁を介して型締
シリンダへの油圧作動流を遮断してなされる。 When performing injection compression molding using a mold clamping device having a conventional toggle link mechanism, the mold opening amount, that is, a certain gap between both molds is secured in order to perform injection compression. The stage mold clamping is performed, and the completion of the first stage mold clamping is confirmed by a limit switch, which is operated to cut off the hydraulic flow to the mold clamping cylinder via a solenoid valve.
しかし、これは金型の隙間の調整が困難である
とともに、各サイクル毎の再現性が、作動油の温
度差とか、第１段型締のスピードの影響を受け易
く、金型間の型開き量にバラツキが生じ易く、成
形品にも悪影響を及ぼすことになる。 However, this makes it difficult to adjust the gap between the molds, and the reproducibility of each cycle is easily affected by the temperature difference of the hydraulic oil and the speed of the first stage mold clamping. Variations in the amount tend to occur, which also has a negative effect on the molded product.
このような欠点を解消するために、４本のタイ
ロツドに設けた直圧シリンダに色々の工夫を施し
て型開き量を確保せんとしたものもあるが、これ
はその構成が複雑で高価となり、とくにその型締
装置は、別に製作しなければならず汎用性がない
ものであつた。 In order to overcome these drawbacks, there have been attempts to secure the amount of mold opening by applying various techniques to the direct pressure cylinders installed on the four tie rods, but this resulted in a complex and expensive structure. In particular, the mold clamping device had to be manufactured separately and was not versatile.
本発明はこれらの点を考慮して開発したもので
あつて、型開き量の確保機構を型締シリンダの方
にこれを設け、しかもその機構を簡易化し、そし
て従来の標準的な型締装置にも簡単にその型締シ
リンダを交換してその改造ができるように工夫し
たものである。 The present invention was developed taking these points into consideration. It provides a mechanism for securing the mold opening amount in the mold clamping cylinder, simplifies the mechanism, and replaces the conventional standard mold clamping device. It was devised so that it could be easily modified by replacing the mold clamping cylinder.
これを図示のものについて説明する。 This will be explained with reference to the diagram.
１は固定金型３を設けた固定盤、２は可動金型
４を設けた可動盤、５は第１段の型締を完了した
時のキヤビテイ、５′は第２段型締を完了した時
のキヤビテイを示す。 1 is a fixed plate with a fixed mold 3 installed, 2 is a movable plate with a movable mold 4 installed, 5 is the cavity when the first stage mold clamping is completed, and 5' is the cavity when the second stage mold clamping is completed. Shows the cavity of time.
６は第１段の型締の完了時に、第２段型締に必
要な成形品の圧縮量、すなわち両金型４，５間の
型開き量である。 6 is the amount of compression of the molded product required for the second stage mold clamping upon completion of the first stage mold clamping, that is, the mold opening amount between the two molds 4 and 5.
７は可動盤２と型締ハウジング９との間に取付
けられたトグルリンク機構で、このトグルリンク
機構７は、型締ハウジング９に設けられた型締シ
リンダ１０の型締ピストン１１のピストンロツド
１１′の動きにより、クロスヘツド８を介して作
動する。 Reference numeral 7 denotes a toggle link mechanism installed between the movable platen 2 and the mold clamping housing 9, and this toggle link mechanism 7 is connected to the piston rod 11' of the mold clamping piston 11 of the mold clamping cylinder 10 provided in the mold clamping housing 9. movement through the crosshead 8.
型締シリンダ１０には分離壁２１を設けて大
径、小径の２シリンダ室１０′，１０″を構成す
る。 The mold clamping cylinder 10 is provided with a separation wall 21 to form two cylinder chambers 10' and 10'' of a large diameter and a small diameter.
大径のシリンダ室１０′には、型保持ピストン
１３を、小径のシリンダ室１０″には型締ピスト
ン１１を嵌装する。 A mold holding piston 13 is fitted into the large diameter cylinder chamber 10', and a mold clamping piston 11 is fitted into the small diameter cylinder chamber 10''.
型保持ピストン１３のピストンロツド１５は分
離壁２１を貫通し、さらに型締ピストン１１にね
じ結合されたストツパリング１２に穿設した貫挿
孔１２′を挿通し、同ピストン１１のピストンロ
ツド１１′内のシリンダ部１１″内に嵌装される。 The piston rod 15 of the mold holding piston 13 passes through the separation wall 21, and is further inserted into the through hole 12' formed in the stopper ring 12 screwed to the mold clamping piston 11, so that the cylinder inside the piston rod 11' of the piston 11 is inserted. It is fitted into the section 11''.
１４はピストンロツド１５端部に取付けられた
ストツパピストン、２２は分離壁２１に設けたＯ
リングである。 14 is a stopper piston attached to the end of the piston rod 15, and 22 is an O provided on the separation wall 21.
It's a ring.
１６は型締シリンダ１０の頭部にねじ結合した
調整ストツパで、この調整ストツパ１６は型保持
ピストン１３と当接し、型保持ピストン１３のス
トロークを、微調整可能に、制限する。 Reference numeral 16 denotes an adjustment stopper screwed to the head of the mold clamping cylinder 10. The adjustment stopper 16 comes into contact with the mold holding piston 13 and limits the stroke of the mold holding piston 13 in a finely adjustable manner.
１７，１８，１９，２０は型締シリンダ１０に
設けられた圧油の接続口、S1，S2，S3は電磁弁で
ある。 17, 18, 19, and 20 are pressure oil connection ports provided in the mold clamping cylinder 10, and S 1 , S 2 , and S 3 are solenoid valves.
D1は小径のシリンダ室１０″の直径、D2は大径
のシリンダ室１０′の直径、D3は型締ピストン１
１のピストンロツド１１′のシリンダ部１１″の直
径、ｄは型保持ピストン１３のピストンロツド１
５の直径、L1は型締ピストン１１の第１段型締
のストローク、L3は第２段型締のストローク、
L2は同ピストン１１の全ストロークでL2＝L1＋
L3である。 D 1 is the diameter of the small diameter cylinder chamber 10'', D 2 is the diameter of the large diameter cylinder chamber 10', and D 3 is the mold clamping piston 1.
The diameter of the cylinder portion 11'' of the piston rod 11' of the mold holding piston 13, d is the diameter of the piston rod 11'' of the mold holding piston 13.
5 is the diameter, L 1 is the stroke of the first stage mold clamping of the mold clamping piston 11, L 3 is the stroke of the second stage mold clamping,
L 2 is the entire stroke of the same piston 11, and L 2 = L 1 +
It is L3 .
Ａはシリンダ室１０″の有効面積、Ａはシ
リンダ室１０″の有効面積であつて、Ａ＞Ａ
である。 A is the effective area of the cylinder chamber 10'', A is the effective area of the cylinder chamber 10'', and A>A
It is.
その作用効果を述べる。 I will describe its effects.
電磁弁S1および電磁弁S3を励磁して、同圧の圧
油を、それぞれ接続口１８および接続口１９に同
時流入させる。 Solenoid valve S 1 and solenoid valve S 3 are energized to cause pressure oil of the same pressure to simultaneously flow into connection port 18 and connection port 19, respectively.
型保持ピストン１３はその圧油により左方に移
動し、調整ストツパ１６に当つて停止する。 The mold holding piston 13 is moved to the left by the pressure oil, and stops when it hits the adjustment stopper 16.
一方、型締ピストン１１は、圧油により右方に
移動しストロークL1の行程を行い、その間クロ
スヘツド８を介してトグルリンク機構７を作動し
て可動金型４を型閉方向に移行させる。そしてそ
のストツパリング１２が、前記のように調整スト
ツパ１６に圧着している型保持ピストン１３のピ
ストンロツド１５のストツパピストン１４に当つ
て停止する。 On the other hand, the mold clamping piston 11 is moved to the right by pressure oil and performs a stroke L1 , during which time the toggle link mechanism 7 is actuated via the crosshead 8 to move the movable mold 4 in the mold closing direction. The stopper ring 12 then comes into contact with the stopper piston 14 of the piston rod 15 of the mold holding piston 13 which is pressed against the adjustment stopper 16 as described above and is stopped.
この時Ａ＞Ａであるので、調整ストツパ１
６に圧着して固定された状態の型保持ピストン１
３のピストンロツド１５先端のストツパピストン
１４に、型締ピストン１１のストツパリング１２
が当つて機械的に確実にストツプすることにな
る。 At this time, since A>A, adjustment stopper 1
Mold holding piston 1 crimped and fixed to 6
The stopper ring 12 of the mold clamping piston 11 is attached to the stopper piston 14 at the tip of the piston rod 15 of No. 3.
This will ensure a mechanical stop.
そしてクロスヘツド８の移行を停止し、トグル
リンク機構７はその位置で停止し、固定金型３と
可動金型４との間の隙間、すなわち両金型間の一
定の型開き量６が確保され、第１段の型締がなさ
れる。 Then, the movement of the crosshead 8 is stopped, the toggle link mechanism 7 is stopped at that position, and a gap between the fixed mold 3 and the movable mold 4, that is, a constant mold opening amount 6 between both molds is secured. , the first stage of mold clamping is performed.
この状態で、キヤビテイ５の中に溶融樹脂が射
出されるが、接続口１８からの圧油で、型締ピス
トン１１を型閉方向に押圧しているので、可動金
型４は、樹脂内圧によつて型開方向に後退するこ
とは全くない。 In this state, molten resin is injected into the cavity 5, but since the mold clamping piston 11 is pressed in the mold closing direction by pressure oil from the connection port 18, the movable mold 4 is kept under the resin internal pressure. Therefore, there is no retreat at all in the mold opening direction.
溶融樹脂の射出が完了すると、電磁弁S3を非励
磁とすることにより、接続口１９はシリンダ室１
０′の圧力を開放し、型保持ピストン１３と調整
ストツパ１６との圧着力が解かれる。 When the injection of molten resin is completed, the solenoid valve S3 is de-energized, and the connection port 19 is connected to the cylinder chamber 1.
The pressure of 0' is released, and the pressing force between the mold holding piston 13 and the adjustment stopper 16 is released.
したがつて型締ピストン１１は、圧油により、
そのストツパリング１２が、型保持ピストン１３
のピストンロツド１５のストツパピストン１４と
当接した状態で、そのまま型閉方向に、ストロー
クL3だけ、さらに移行し、これに伴つて、トグ
ルリンク機構７の作動で可動金型４は型開き量６
を移動し、キヤビテイ５′のように、圧縮して第
２段の型締がなされる。 Therefore, the mold clamping piston 11 is operated by pressure oil.
The stopper ring 12 is the mold holding piston 13
With the piston rod 15 in contact with the stopper piston 14, the movable mold 4 moves further in the mold closing direction by a stroke L 3 , and the movable mold 4 moves by the amount of mold opening due to the operation of the toggle link mechanism 7. 6
is moved and compressed like cavity 5', and the second stage of mold clamping is performed.
これが終りキヤビテイ５′を冷却し、電磁弁S2
を励磁させ、接続口１７より圧油を送り、型締ピ
ストン１１を型開き方向に移動させて可動金型４
を開いてキヤビテイ５′内の成形品を取出す。 After this, the cavity 5' is cooled and the solenoid valve S 2
is excited, pressure oil is sent from the connection port 17, the mold clamping piston 11 is moved in the mold opening direction, and the movable mold 4 is moved.
Open it and take out the molded product inside the cavity 5'.
本発明は２段型締に必要な固定金型と可動金型
との開き量を、圧油による型保持ピストン調整ス
トツパとの圧着と、型締ピストンと型保持ピスト
ンのピストンロツドのストツパピストンとの係合
によつて、型締ピストンのストロークを制限する
ことによつて機械的に精密にこれを規制すること
ができる。 The present invention reduces the opening amount between the fixed mold and the movable mold necessary for two-stage mold clamping by crimping the mold holding piston with the adjusting stopper using pressure oil, and by adjusting the stopper piston of the piston rod of the mold clamping piston and the mold holding piston. This can be precisely regulated mechanically by limiting the stroke of the mold clamping piston by the engagement of the mold clamping piston.
したがつて、その再現性が高く反覆して行われ
る型締毎にこれが狂うことは全くない。 Therefore, the reproducibility is high and there is no possibility that the mold clamping process will go awry every time the mold clamping is repeated.
またその型開き量は型保持ピストンが圧油によ
つて圧着する調整ストツパの調整によつて極めて
容易にしかも高精度に調整することができる。 Further, the amount of mold opening can be adjusted very easily and with high precision by adjusting an adjustment stopper to which the mold holding piston is pressed by pressure oil.
そして本発明はこの固定金型と可動金型との型
開き量の確保機構を、タイバーに設けたシリンダ
の方に設けないで、型締シリンダそのものに設け
ているので、従来の標準的な型締装置の型締シリ
ンダを、簡単にこれに交換することができる。し
たがつて、その改造に便であり、また、その際は
油圧、電気回路の一部の改造のみでこれを行うこ
とができるので、従来コストの1/10〜1/15で標準
の型締装置を圧縮成形用に改造することができ
る。 In addition, in the present invention, the mechanism for securing the mold opening amount between the fixed mold and the movable mold is not provided in the cylinder provided on the tie bar, but is provided in the mold clamping cylinder itself. The mold clamping cylinder of the clamping device can be easily replaced with this. Therefore, it is easy to modify, and in that case, it can be done by only modifying a part of the hydraulic and electric circuits, so it is possible to replace the standard mold clamping at 1/10 to 1/15 of the conventional cost. The equipment can be modified for compression molding.
第１図は本装置全体の正面図であつてその上半
は第１段型締の状態を示し、下半は第２段型締の
状態を示す。第２図はその要部の縦断側面図であ
る。
７……トグルリンク機構、９……型締ハウジン
グ、１０……型締シリンダ、１０′……大径のシ
リンダ室、１０″……小径のシリンダ室、１１…
…型締ピストン、１１′……ピストンロツド、１
２′……貫挿孔、１３……型保持ピストン、１４
……ストツパピストン、１５……ピストンロツ
ド、１６……調整ストツパ。
FIG. 1 is a front view of the entire apparatus, the upper half of which shows the first stage clamping state, and the lower half showing the second stage mold clamping state. FIG. 2 is a longitudinal sectional side view of the main part. 7...Toggle link mechanism, 9...Mold clamping housing, 10...Mold clamping cylinder, 10'...Large diameter cylinder chamber, 10''...Small diameter cylinder chamber, 11...
...Mold clamping piston, 11'...Piston rod, 1
2'...Through hole, 13...Mold holding piston, 14
...Stopper piston, 15...Piston rod, 16...Adjustment stopper.
Claims (1)
成した型締シリンダに型保持ピストンと型締ピス
トンを、それぞれ嵌装し、型締シリンダには、前
記型保持ピストンのストロークを制限する調整ス
トツパを設け、型保持ピストンのピストンロツド
は小径のシリンダ室内の型締ピストンに穿設した
貫挿孔を貫通せしめてその端部にストツパピスト
ンを固定し、かつ型締ピストンのピストンロツド
とトグルリンク機構７とを連繋した射出圧縮成形
装置。1. A mold holding piston and a mold clamping piston are respectively fitted into a mold clamping cylinder that has a large diameter cylinder chamber and a small diameter cylinder chamber, and the mold clamping cylinder is provided with an adjustment stopper that limits the stroke of the mold holding piston. The piston rod of the mold holding piston passes through a through-hole drilled in the mold clamping piston in the small diameter cylinder chamber, and the stopper piston is fixed to the end thereof, and the piston rod of the mold clamping piston and the toggle link mechanism 7 An injection compression molding device that is connected to the
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180781A JPS57137127A (en) | 1981-02-17 | 1981-02-17 | Injection and compression molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180781A JPS57137127A (en) | 1981-02-17 | 1981-02-17 | Injection and compression molding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57137127A JPS57137127A (en) | 1982-08-24 |
| JPS6135926B2 true JPS6135926B2 (en) | 1986-08-15 |
Family
ID=12065317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2180781A Granted JPS57137127A (en) | 1981-02-17 | 1981-02-17 | Injection and compression molding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57137127A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588364A (en) * | 1985-04-01 | 1986-05-13 | Husky Injection Molding Systems Ltd. | Clamp mechanism |
| JPS6391217A (en) * | 1986-10-06 | 1988-04-21 | Toyo Mach & Metal Co Ltd | Toggle mold clamping equipment |
| JPS639523A (en) * | 1986-06-30 | 1988-01-16 | Mitsubishi Heavy Ind Ltd | Method and device for injection and compression molding |
| JPS63116820A (en) * | 1986-11-06 | 1988-05-21 | Japan Steel Works Ltd:The | Method and apparatus for controlling mold clamping of injection molding machine |
-
1981
- 1981-02-17 JP JP2180781A patent/JPS57137127A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57137127A (en) | 1982-08-24 |
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