JPS6337224Y2 - - Google Patents
Info
- Publication number
- JPS6337224Y2 JPS6337224Y2 JP7386983U JP7386983U JPS6337224Y2 JP S6337224 Y2 JPS6337224 Y2 JP S6337224Y2 JP 7386983 U JP7386983 U JP 7386983U JP 7386983 U JP7386983 U JP 7386983U JP S6337224 Y2 JPS6337224 Y2 JP S6337224Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- hydraulic
- pressure oil
- mold
- chamber
- 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
- 238000007666 vacuum forming Methods 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
本考案は、射出成形機において、その金型のキ
ヤビテイー内の真空引きを行つて射出成形を行う
真空成形機の真空引き装置に関するものである。[Detailed Description of the Invention] The present invention relates to a vacuum evacuation device for a vacuum forming machine that performs injection molding by evacuating the cavity of a mold in the injection molding machine.
一般に、射出成形機では、射出速度を速くする
ことによつて、サイクルタイムを短かくし、かつ
ヒケ、ソリなどの成形欠陥を防ぐことが普通行な
われ、またこのため射出の油圧回路にアキユムレ
ータを装備して射出速度を速くしている。 In general, injection molding machines shorten the cycle time and prevent molding defects such as sink marks and warpage by increasing the injection speed, and for this purpose, the injection hydraulic circuit is equipped with an accumulator. This increases the injection speed.
ところが、射出速度を速くすると、金型のキヤ
ビテイー内の空気の逃げが悪くなつて金型内に閉
じこめられ、これが断熱圧縮による発熱を誘引
し、成形品の焼けが発生する。 However, when the injection speed is increased, the air in the cavity of the mold becomes difficult to escape and is trapped inside the mold, which induces heat generation due to adiabatic compression and causes burning of the molded product.
これを防止するものとして、金型のキヤビテイ
ー内を真空引きして射出成形する所謂真空成形機
がある。 To prevent this, there is a so-called vacuum forming machine that performs injection molding by evacuating the inside of a mold cavity.
これは、第１図で示すように、型締シリンダ３
内に圧油を導入し、そのピストン４で可動盤２を
固定盤１に向けて移動させ、固定側金型５と可動
側金型６が密着した時点で切換弁９を開き、モー
タ２２の駆動にり真空ポンプ１１で真空引きされ
た真空タンク１０より金型のキヤビテイー２１の
真空引きを行い、同時に型締シリンダ３に高圧油
を導入して、所定の型締力を発生させて射出成形
を行うものである。 This is the mold clamping cylinder 3 as shown in FIG.
Pressure oil is introduced into the interior, the movable platen 2 is moved toward the fixed platen 1 by the piston 4, and when the fixed side mold 5 and the movable side mold 6 are in close contact, the switching valve 9 is opened and the motor 22 is switched on. During driving, the cavity 21 of the mold is evacuated from the vacuum tank 10 evacuated by the vacuum pump 11, and at the same time, high pressure oil is introduced into the mold clamping cylinder 3 to generate a predetermined mold clamping force to perform injection molding. This is what we do.
したがつて、これには、真空タンク１０、真空
ポンプ１１、モータ２２などの高価な装置が必要
となり、また常時モータ２２を回転させ真空タン
ク１０の真空度を維持させておくことが必要とな
り、この点電力ロスの問題が生じる。 Therefore, this requires expensive equipment such as the vacuum tank 10, vacuum pump 11, and motor 22, and it is also necessary to constantly rotate the motor 22 to maintain the degree of vacuum in the vacuum tank 10. At this point, a problem of power loss occurs.
本考案は、従来装置のこのような欠点を解消す
るために、射出成形機本体の油圧動力源を直接利
用して簡単な真空引き装置を提供せんとするもの
である。 In order to overcome these drawbacks of the conventional devices, the present invention aims to provide a simple vacuuming device that directly utilizes the hydraulic power source of the injection molding machine body.
その構成を図示のものについて説明する。 The configuration shown in the drawings will be explained.
固定側金型５と可動側金型６との間で形成され
るキヤビテイー２１に通じる真空引き流路８を空
圧シリンダ１２のシリンダ室１２′に導く。１３
は空圧シリンダ１２と同芯の油圧シリンダで、こ
の油圧シリンダ１３には、空圧シリンダ１２に嵌
装したピストン２４と、連結棒１４をもつて一体
的に形成したピストン２３を嵌装する。 A vacuum passage 8 leading to a cavity 21 formed between the stationary mold 5 and the movable mold 6 is led to the cylinder chamber 12' of the pneumatic cylinder 12. 13
is a hydraulic cylinder coaxial with the pneumatic cylinder 12, and a piston 24 fitted in the pneumatic cylinder 12 and a piston 23 formed integrally with the connecting rod 14 are fitted into this hydraulic cylinder 13.
油圧シリンダ１３の前室１３′と後室１３″は、
油圧切換弁１７の各ポートP1，P2とそれぞれ連
通する。 The front chamber 13' and rear chamber 13'' of the hydraulic cylinder 13 are
It communicates with each port P 1 and P 2 of the hydraulic switching valve 17, respectively.
P3は同切換弁１７の圧油導入ポートであつて、
このポートP3は圧油導入管１６をもつて型締シ
リンダ３への圧油導入流路１５と連通する。P4
は同弁の排油ポートである。 P3 is the pressure oil introduction port of the switching valve 17,
This port P 3 communicates with a pressure oil introduction passage 15 to the mold clamping cylinder 3 through a pressure oil introduction pipe 16 . P4
is the oil drain port of the same valve.
１８は型締シリンダ３の油圧切換弁であつてそ
の各ポートP1，P2は型締シリンダ３の両油室
３′，３″と、前記圧油導入流路１５および戻し圧
油導入流路１５′をもつて連絡する。 Reference numeral 18 denotes a hydraulic switching valve for the mold clamping cylinder 3, and its ports P 1 and P 2 are connected to both oil chambers 3' and 3'' of the mold clamping cylinder 3, the pressure oil introduction passage 15, and the return pressure oil introduction flow. 15'.
２０はポンプであつてその送油管２５は油圧切
換弁１８の圧油導入ポートP3と連絡する。P4は
同切換弁１８の排出ポートである。１９は送油管
２１に設けたリリーフバルブ、ａ，ｂは各弁１
７，１８の切換えのための各ソレノイドである。 Reference numeral 20 denotes a pump, and its oil feed pipe 25 communicates with the pressure oil introduction port P 3 of the hydraulic switching valve 18 . P4 is the discharge port of the switching valve 18. 19 is a relief valve provided in the oil pipe 21, a and b are each valve 1
7 and 18 are the respective solenoids for switching.
その作用を説明する。 The effect will be explained.
油圧切換弁１８のソレノイドａを励磁し、ポン
プ２０の送油管２５の圧油を同切換弁１８の各ポ
ートP3，P1を経て圧油導入流路１５より型締シ
リンダ３の一方の油室３′へ導入し、可動側金型
６を固定側金型５に密着させる。 The solenoid a of the hydraulic switching valve 18 is energized, and the pressure oil in the oil feed pipe 25 of the pump 20 is supplied to one side of the mold clamping cylinder 3 from the pressure oil introduction channel 15 through each port P 3 and P 1 of the switching valve 18. The movable die 6 is brought into close contact with the stationary die 5 by introducing it into the chamber 3'.
そして油圧切換弁１７のソレノイドｂを励磁さ
せ、前記圧油導入流路１５の圧油を圧油導入管１
６より、同弁の各ポートP3，P2を経て、油圧シ
リンダ１３の後室１３″に導入し、ピストン２３
を左行させ、キヤビテイー２１の内の空気を、空
圧シリンダ１２のシリンダ室１２′へ真空引きす
る。そしてピストン２３が、図面において左端に
到達すると、圧油導入流路１５内の圧油は型締シ
リンダ３へ作用し、リリーフバルブ１９で設定さ
れた圧力まで上昇して所定の型締力を発生する。 Then, the solenoid b of the hydraulic switching valve 17 is energized, and the pressure oil in the pressure oil introduction passage 15 is transferred to the pressure oil introduction pipe 1.
6, it is introduced into the rear chamber 13'' of the hydraulic cylinder 13 through each port P 3 and P 2 of the same valve, and the piston 23
is moved to the left to evacuate the air in the cavity 21 to the cylinder chamber 12' of the pneumatic cylinder 12. When the piston 23 reaches the left end in the drawing, the pressure oil in the pressure oil introduction channel 15 acts on the mold clamping cylinder 3, increases to the pressure set by the relief valve 19, and generates a predetermined mold clamping force. do.
次いで図示のない油圧センサなどの信号で射出
成形を行う。 Next, injection molding is performed using signals from a hydraulic sensor (not shown) or the like.
射出、保圧が終了し油圧切換弁１８を中立の位
置に戻す。 After injection and pressure holding are completed, the hydraulic switching valve 18 is returned to the neutral position.
そして冷却工程中に油圧切換弁１７の他方のソ
レノイドａを励磁し、ピストン２３を右行させ空
圧シリンダ１２のピストン２４を右行させ破線の
位置に到らせる。 During the cooling process, the other solenoid a of the hydraulic switching valve 17 is energized, causing the piston 23 to move to the right and the piston 24 of the pneumatic cylinder 12 to move to the right to reach the position indicated by the broken line.
冷却完了後、油圧切換弁１８の他方のソレノイ
ドｂを励磁して型開きをする。 After cooling is completed, the other solenoid b of the hydraulic switching valve 18 is energized to open the mold.
型開き完了後は油圧切換弁１７，１８を中立の
位置にする。 After the mold opening is completed, the hydraulic switching valves 17 and 18 are set to the neutral position.
なお、本装置はトグル式の型締装置においても
当然利用することができるものである。 Note that this device can of course also be used in a toggle type mold clamping device.
その効果を説明する。 The effect will be explained.
本考案はその構成が極めて簡単であるので、従
来のような高価な真空タンク、真空ポンプ、モー
タなど必要でなく、しかも真空成形機本体の油圧
動力源をそのまま使用し、そして市販の油圧シリ
ンダ、空圧シリンダを使用することができるの
で、その装置は安価となり、また維持運営費も安
価であつてサイクルタイムを短くすることができ
るものであり、延いては、成形品の単価を下げる
ことが可能となる。 Since the structure of the present invention is extremely simple, there is no need for conventional expensive vacuum tanks, vacuum pumps, or motors, and the hydraulic power source of the vacuum forming machine itself can be used as is, and commercially available hydraulic cylinders and Since pneumatic cylinders can be used, the equipment is inexpensive, maintenance costs are low, and cycle time can be shortened, which in turn can reduce the unit price of molded products. It becomes possible.
第１図は従来装置の縦断側面図、第２図は本装
置の縦断側面図である。
３……型締シリンダ、５……固定側金型、６…
…可動側金型、８……真空引き流路、１２……空
圧シリンダ、１２′……シリンダ室、１３……油
圧シリンダ、１３′……前室、１３″……後室、１
５……圧油導入流路、１７……油圧切換弁、２３
……ピストン、２４……ピストン。
FIG. 1 is a longitudinal sectional side view of a conventional device, and FIG. 2 is a longitudinal sectional side view of the present device. 3...Mold clamping cylinder, 5...Fixed side mold, 6...
...Movable side mold, 8...Vacuum passage, 12...Pneumatic cylinder, 12'...Cylinder chamber, 13...Hydraulic cylinder, 13'...Front chamber, 13''...Rear chamber, 1
5... Pressure oil introduction channel, 17... Hydraulic switching valve, 23
...Piston, 24...Piston.
Claims (1)
キヤビテイー２１に通じる真空引き流路８を、空
圧シリンダ１２のシリンダ室１２′に導き、空圧
シリンダ１２に嵌装したピストン２４と連結棒１
４をもつて一体に形成したピストン２３を、空圧
シリンダ１２と同芯の油圧シリンダ１３に嵌装
し、油圧シリンダ１３の前室１３′および後室１
３″を、型締シリンダ３に圧油を導入する圧油導
入流路１５と、油圧切換弁１７を介してそれぞれ
連通した真空成形機の真空引き装置。 A vacuum passage 8 leading to a cavity 21 formed between the stationary mold 5 and the movable mold 6 is guided into the cylinder chamber 12' of the pneumatic cylinder 12, and the piston 24 fitted in the pneumatic cylinder 12 is guided into the cylinder chamber 12' of the pneumatic cylinder 12. and connecting rod 1
4 is fitted into the hydraulic cylinder 13 coaxial with the pneumatic cylinder 12, and the front chamber 13' and the rear chamber 1 of the hydraulic cylinder 13 are connected to each other.
3'' is connected to a pressure oil introduction channel 15 for introducing pressure oil into the mold clamping cylinder 3 via a hydraulic pressure switching valve 17, respectively, to a vacuum evacuation device of a vacuum forming machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7386983U JPS59179020U (en) | 1983-05-18 | 1983-05-18 | Vacuum forming machine vacuum device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7386983U JPS59179020U (en) | 1983-05-18 | 1983-05-18 | Vacuum forming machine vacuum device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59179020U JPS59179020U (en) | 1984-11-30 |
| JPS6337224Y2 true JPS6337224Y2 (en) | 1988-10-03 |
Family
ID=30203982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7386983U Granted JPS59179020U (en) | 1983-05-18 | 1983-05-18 | Vacuum forming machine vacuum device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59179020U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6250105A (en) * | 1985-08-29 | 1987-03-04 | Nissan Shatai Co Ltd | Injection molding machine |
-
1983
- 1983-05-18 JP JP7386983U patent/JPS59179020U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59179020U (en) | 1984-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR920009273B1 (en) | Mould clamping device | |
| JP2704572B2 (en) | Mold clamping device of molding machine | |
| US4925618A (en) | Mold clamping method | |
| WO2015151701A1 (en) | Casting method and casting device | |
| JPS6337224Y2 (en) | ||
| EP1059155A1 (en) | Mold clamping apparatus | |
| JPS6141287B2 (en) | ||
| JPS62207554A (en) | Vacuum die casting device | |
| JPH05261750A (en) | Injection molding method and device of molded product having hollow part | |
| JPS6343059Y2 (en) | ||
| JPS6030036Y2 (en) | Mold clamping device for injection molding machine | |
| JPH04178254A (en) | Vacuum die cast machine | |
| JP2553619Y2 (en) | Mold clamping device of injection molding machine | |
| JP3196144B2 (en) | Mold clamping devices such as injection molding machines | |
| JP3234693B2 (en) | Mold clamping device of injection molding machine | |
| JPH0345118U (en) | ||
| KR960004482Y1 (en) | Mold clamping apparatus for injection molding machine | |
| JPS62220264A (en) | Vacuum die casting apparatus | |
| JPH0418816Y2 (en) | ||
| JP3284099B2 (en) | Control method of mold clamping device | |
| JPS61206616A (en) | Injection compression molding machine | |
| JP2551413Y2 (en) | Mold clamping device of injection molding machine | |
| JPS6350094Y2 (en) | ||
| JPH1158397A (en) | Mold clamping method for straight-hydraulic mold clamping system | |
| JPH0773787B2 (en) | Molding machine clamping device |