JPS644498Y2 - - Google Patents
Info
- Publication number
- JPS644498Y2 JPS644498Y2 JP18800184U JP18800184U JPS644498Y2 JP S644498 Y2 JPS644498 Y2 JP S644498Y2 JP 18800184 U JP18800184 U JP 18800184U JP 18800184 U JP18800184 U JP 18800184U JP S644498 Y2 JPS644498 Y2 JP S644498Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- nozzle
- pressure
- attached
- hydraulic
- 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
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Injection Moulding Of 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、スタツクモールド型射出成形機等の
ノズルタツチ及びノズル移動装置の改良に関する
ものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a nozzle touch and a nozzle moving device of a stack mold injection molding machine or the like.
(従来技術とその問題点)
従来、この種の射出成形機では、1シヨツト毎
の型開閉時に射出ノズルと金型が離れるため、成
形品へのエア混入、成形品の色ムラ、ヒケ等が生
じ易いという不具合を免れなかつた。(Prior art and its problems) Conventionally, in this type of injection molding machine, the injection nozzle and the mold are separated when the mold is opened and closed for each shot, resulting in air intrusion into the molded product, uneven color of the molded product, sink marks, etc. We could not avoid the problems that tend to occur.
そこで、かかる不具合を解消する方策として、
本出願人は、ノズルタツチ用油圧シリンダの油圧
を制御して該シリンダにより成形作業中射出ノズ
ルと金型とを密着させておく方法を開発し既に出
願もしている(特開昭58−168538号公報参照)
が、この従来方法では金型の移動とノズルの移動
を確実に一致させねばならず、正確かつ微妙な油
圧制御が必要であり、製作費が高くつくと共に、
油圧作動であるため動作が遅い等の不具合があつ
た。 Therefore, as a measure to resolve this problem,
The present applicant has developed a method of controlling the hydraulic pressure of a nozzle touch hydraulic cylinder to keep the injection nozzle and mold in close contact with each other during the molding operation, and has already applied for this method (Japanese Patent Laid-Open No. 168538/1983). reference)
However, in this conventional method, the movement of the mold and the movement of the nozzle must be reliably matched, which requires precise and delicate hydraulic control, which increases production costs and
Because it is hydraulically operated, there were problems such as slow operation.
(考案の目的)
本考案は、前記従来の問題点を一挙に解決する
ためになしたもので、金型と射出ノズルとを正確
にタツチさせると共に、シリンダの制御を簡易化
し、安価に製作可能とすると共に、成形品の品質
向上を図ることを目的とする。(Purpose of the invention) This invention was made to solve the above-mentioned conventional problems all at once.It allows accurate contact between the mold and the injection nozzle, simplifies cylinder control, and allows manufacturing at low cost. The purpose is to improve the quality of molded products.
(考案の構成)
本考案に係る射出成形機のノズルタツチ及びノ
ズル移動装置は、一端を固定プラテン又は固定フ
レームに装着し、他端を可塑化装置に装着すると
共に、切換弁を介して油圧源に接続された高圧ノ
ズルタツチ用の油圧シリンダと、一端を固定フレ
ーム又は固定プラテンに装着し、他端を可塑化装
置に装着すると共に、切換弁を介して空圧源に接
続された可塑化装置移動用の空圧シリンダとを併
設し、射出ノズルと金型を成形工程中、常時一定
の空圧力により密着させておくと共に、射出及び
保圧工程中には油圧力により圧着するようにした
ことを特徴とする。(Structure of the invention) The nozzle touch and nozzle moving device for an injection molding machine according to the invention has one end attached to a fixed platen or a fixed frame, the other end attached to a plasticizing device, and connected to a hydraulic source via a switching valve. A hydraulic cylinder for the connected high-pressure nozzle touch, one end attached to a fixed frame or fixed platen, the other end attached to the plasticizing device, and connected to a pneumatic source via a switching valve for moving the plasticizing device. The injection nozzle and mold are always kept in close contact with each other by constant pneumatic pressure during the molding process, and are crimped by hydraulic pressure during the injection and pressure holding processes. shall be.
(実施例)
以下本考案をスタツクモールド型射出成形機に
実施した一実施例を図面により説明する。(Example) An example in which the present invention is applied to a stack mold injection molding machine will be described below with reference to the drawings.
図中1は成形機フレーム2上に固定された固定
プラテンで、該プラテン1には固定金型3が装着
されている。 In the figure, reference numeral 1 denotes a fixed platen fixed on a molding machine frame 2, and a fixed mold 3 is attached to the platen 1.
4は後記油圧シリンダ6または空圧シリンダ1
0により移動可能に成形機フレーム2上に載置さ
れた可塑化装置で、該装置4の先端部には射出ノ
ズル5が装着されている。 4 is a hydraulic cylinder 6 or a pneumatic cylinder 1 described later.
The plasticizing device 4 is movably mounted on a molding machine frame 2, and an injection nozzle 5 is attached to the tip of the device 4.
6は一端を固定プラテン1に、また、他端を可
塑化装置4に夫々装着された高圧ノズルタツチ用
の油圧シリンダで、該シリンダ6は切換弁7を介
して油圧源8とタンク9に接続されている。 Reference numeral 6 denotes a hydraulic cylinder for high-pressure nozzle touch, which is attached to the fixed platen 1 at one end and to the plasticizing device 4 at the other end, and the cylinder 6 is connected to a hydraulic source 8 and a tank 9 via a switching valve 7. ing.
10は一端を前記可塑化装置4の油圧シリンダ
6の反対側に、また、他端を該装置4の反固定プ
ラテン1側の成形機の固定フレーム11に夫々装
着された可塑化装置移動用の空圧シリンダで、該
シリンダ10は切換弁12及び減圧弁13を介し
て空圧源14に接続されている。15は圧力計で
ある。 Reference numeral 10 denotes a plasticizing device moving member, which has one end mounted on the opposite side of the hydraulic cylinder 6 of the plasticizing device 4 and the other end mounted on the fixed frame 11 of the molding machine on the side opposite to the fixed platen 1 of the device 4. A pneumatic cylinder, the cylinder 10 is connected to a pneumatic source 14 via a switching valve 12 and a pressure reducing valve 13. 15 is a pressure gauge.
16は型締装置17により前記固定プラテン1
に対して進退可能な可動プラテンで、該プラテン
16には可動金型18が装着されている。 16, the fixed platen 1 is fixed by a mold clamping device 17;
The platen 16 is a movable platen that can move forward and backward relative to the platen 16, and a movable mold 18 is attached to the platen 16.
19は前記固定金型3と可動金型18との間に
配設された中間金型で、該金型19は型締装置1
7により後記ラツク・ピニオン機構を介して可動
金型18の移動に連動して、該金型18と固定金
型3との間を移動可能に構成されている。この中
間金型19には固定金型3を貫通して射出ノズル
5側に突出するロングノズル20が設けられてい
る。前記ラツク・ピニオン機構は、固定金型3及
び可動金型18に上下対向するように取付けられ
たラツク21,22と、中間金型19に取付けら
れ、前記ラツク21,22とかみ合つたピニオン
23とから構成されている。 19 is an intermediate mold disposed between the fixed mold 3 and the movable mold 18, and the mold 19 is connected to the mold clamping device 1.
7, it is configured to be movable between the mold 18 and the fixed mold 3 in conjunction with the movement of the movable mold 18 via a rack and pinion mechanism described later. This intermediate mold 19 is provided with a long nozzle 20 that penetrates the fixed mold 3 and projects toward the injection nozzle 5 side. The rack and pinion mechanism includes racks 21 and 22 attached to the fixed die 3 and the movable die 18 so as to face each other vertically, and a pinion 23 attached to the intermediate die 19 and meshed with the racks 21 and 22. It is composed of.
(作用)
型締装置17により可動金型18を開・閉する
と、中間金型19は、ラツク・ピニオン機構21
〜23により可動金型18の移動に連動して金型
18の移動量の1/2だけ移動するから、金型3と
19及び18と19の開閉が同時に行なわれる。(Function) When the movable mold 18 is opened and closed by the mold clamping device 17, the intermediate mold 19 is moved by the rack and pinion mechanism 21.
23, the movable mold 18 moves by 1/2 of the amount of movement of the mold 18 in conjunction with the movement of the movable mold 18, so the molds 3 and 19 and 18 and 19 are opened and closed at the same time.
成形作業中、空圧シリンダ10を制御する切換
弁12のコイル12aが常時励磁され、空圧シリ
ンダ10の押出側(可塑化装置前進側)に、減圧
弁13により制御された一定圧力の圧縮空気が供
給されている。このため、可塑化装置4は、空圧
シリンダ10により金型側に常時押圧されるの
で、射出ノズル5は、中間金型19のロングノズ
ル20に一定の比較的小さな力で密着しながら型
開閉に伴う中間金型19の動きに追従する。一
方、型開閉工程中油圧シリンダ6を制御する切換
弁7のコイル7a,7bは消磁され図示の中立位
置に保持されているが、射出保圧工程中(型締
中)には切換弁7のコイル7bが励磁され、油圧
シリンダ6の引込側(可塑化装置前進側)に圧油
が供給されるため、射出ノズル5と中間金型19
のロングノズル20とは射出圧力に応じた大きい
力で圧着されることになる。 During the molding operation, the coil 12a of the switching valve 12 that controls the pneumatic cylinder 10 is constantly excited, and compressed air at a constant pressure controlled by the pressure reducing valve 13 is supplied to the extrusion side of the pneumatic cylinder 10 (the forward side of the plasticizing device). is supplied. Therefore, the plasticizing device 4 is constantly pressed against the mold side by the pneumatic cylinder 10, so the injection nozzle 5 opens and closes the mold while closely contacting the long nozzle 20 of the intermediate mold 19 with a constant relatively small force. The movement of the intermediate mold 19 is followed. On the other hand, the coils 7a and 7b of the switching valve 7 that controls the hydraulic cylinder 6 during the mold opening/closing process are demagnetized and held at the neutral position shown, but during the injection holding process (mold clamping), the switching valve 7 is The coil 7b is excited and pressure oil is supplied to the retraction side (plasticizing device forward side) of the hydraulic cylinder 6, so that the injection nozzle 5 and the intermediate mold 19
The long nozzle 20 is pressed with a large force corresponding to the injection pressure.
そして、型締工程が完了し、型開・閉工程に移
る前に射出ノズル5とロングノズル20の圧着を
解除するために、切換弁7のコイル7bは消磁さ
れ、図示の中立位置に復帰し、油圧シリンダ6は
フリーとなる。一方、切換弁12のコイル12a
は引続き励磁され、可塑化装置4は空圧シリンダ
10により金型側に押圧される。 After the mold clamping process is completed, in order to release the pressure bond between the injection nozzle 5 and the long nozzle 20 before proceeding to the mold opening/closing process, the coil 7b of the switching valve 7 is demagnetized and returned to the neutral position shown. , the hydraulic cylinder 6 becomes free. On the other hand, the coil 12a of the switching valve 12
continues to be energized, and the plasticizing device 4 is pressed against the mold side by the pneumatic cylinder 10.
従つて、型開閉工程中においても射出ノズル5
とロングノズル20とは密着しており、中間金型
19を開閉するラツク・ピニオン機構21〜23
への負荷となるから、前記空圧シリンダ10によ
る密着力は小さい方がよい。このため、空圧シリ
ンダ10による押付力は、金型とノズルとを密着
させておくに必要な最小限の力に制御するばかり
でなく、例えば、油圧シリンダ6のピストンシー
ルをテフロン等低摺動抵抗のもので構成し、か
つ、油圧回路7〜9も圧力損失の少ないものにす
ると共に、可塑化装置移動用のベアリングをボー
ルベアリング等低摺動抵抗のもので構成して、型
開閉力の増加を防止している。 Therefore, even during the mold opening and closing process, the injection nozzle 5
The long nozzle 20 is in close contact with the rack and pinion mechanisms 21 to 23 that open and close the intermediate mold 19.
Therefore, it is preferable that the adhesion force exerted by the pneumatic cylinder 10 is small. For this reason, the pressing force by the pneumatic cylinder 10 is not only controlled to the minimum force necessary to keep the mold and nozzle in close contact, but also the piston seal of the hydraulic cylinder 6 is made of low-sliding material such as Teflon. The hydraulic circuits 7 to 9 are constructed with resistance, and the hydraulic circuits 7 to 9 are also constructed with low pressure loss, and the bearings for moving the plasticizing device are constructed with low sliding resistance such as ball bearings to reduce mold opening and closing force. The increase is being prevented.
尚、空圧シリンダ10に一定圧力の圧縮空気を
供給するための空圧回路としては、減圧回路12
〜15に限らず、シーケンス弁、アキユムレータ
を使用した可変容量形ポンプによる一定圧供給回
路等であつてもよい。 Note that the pneumatic circuit for supplying compressed air at a constant pressure to the pneumatic cylinder 10 includes a pressure reducing circuit 12.
-15, but may be a constant pressure supply circuit using a sequence valve, a variable displacement pump using an accumulator, or the like.
また、本実施例では、固定プラテン1と可塑化
装置4との間に油圧シリンダ6を配置し、固定フ
レーム11と可塑化装置4との間に空圧シリンダ
10を配置した場合について例示したが、これを
入替えても同効である。 Furthermore, in this embodiment, a case is illustrated in which the hydraulic cylinder 6 is arranged between the fixed platen 1 and the plasticizing device 4, and the pneumatic cylinder 10 is arranged between the fixed frame 11 and the plasticizing device 4. , the same effect can be obtained even if these are replaced.
(考案の効果)
以上の通り本考案は、成形作業中、可塑化装置
を型開閉に伴う中間金型の動きに追従して移動さ
せ、射出ノズルと中間金型(ロングノズル)を常
時密着させておくことができるので、成形品への
エア混入、成形品の色ムラ、ムラ等が生じること
が皆無となり、成形品の品質を確実に向上させる
ことができる。油圧シリンダを高圧ノズルタツチ
専用とし、空圧シリンダで可塑化装置を移動する
ので、油圧及び空圧の制御が簡易となり、油圧回
路及び空圧回路が簡単なもので済むため、製作費
の低減を図ることができる。(Effects of the invention) As described above, the present invention moves the plasticizing device to follow the movement of the intermediate mold as the mold is opened and closed during molding operations, and keeps the injection nozzle and the intermediate mold (long nozzle) in close contact with each other at all times. Therefore, there is no possibility of air intrusion into the molded product, color unevenness, unevenness, etc. of the molded product, and the quality of the molded product can be reliably improved. The hydraulic cylinder is dedicated to the high-pressure nozzle touch, and the pneumatic cylinder moves the plasticizing device, which simplifies the control of hydraulic and pneumatic pressures and requires only a simple hydraulic and pneumatic circuit, reducing production costs. be able to.
図面は本考案の一実施例を示す概要図である。
1……固定プラテン、2……成形機フレーム、
3……固定金型、4……可塑化装置、5……射出
ノズル、6……油圧シリンダ、7……切換弁、8
……油圧源、10……空圧シリンダ、11……固
定フレーム、12……切換弁、13……減圧弁、
14……空圧源、16……可動プラテン、17…
…型締装置、18……可動金型、19……中間金
型、20……ロングノズル、21,22……ラツ
ク、23……ピニオン。
The drawing is a schematic diagram showing an embodiment of the present invention. 1... Fixed platen, 2... Molding machine frame,
3...Fixed mold, 4...Plasticizing device, 5...Injection nozzle, 6...Hydraulic cylinder, 7...Switching valve, 8
... Hydraulic source, 10 ... Pneumatic cylinder, 11 ... Fixed frame, 12 ... Switching valve, 13 ... Pressure reducing valve,
14...Air pressure source, 16...Movable platen, 17...
...Mold clamping device, 18...Movable mold, 19...Intermediate mold, 20...Long nozzle, 21, 22...Rack, 23...Pinion.
Claims (1)
し、他端を可塑化装置に装着すると共に、切換弁
を介して油圧源に接続された高圧ノズルタツチ用
の油圧シリンダと、一端を固定フレーム又は固定
プラテンに装着し、他端を可塑化装置に装着する
と共に、切換弁を介して空圧源に接続された可塑
化装置移動用の空圧シリンダとを併設し、射出ノ
ズルと金型を成形工程中、常時一定の空圧力によ
り密着させておくと共に、射出及び保圧工程中に
は油圧力により圧着するようにしたことを特徴と
する射出成形機のノズルタツチ及びノズル移動装
置。 One end is attached to a fixed platen or fixed frame, the other end is attached to a plasticizing device, and a hydraulic cylinder for high pressure nozzle touch is connected to a hydraulic power source via a switching valve, and one end is attached to a fixed frame or fixed platen. The other end is attached to the plasticizing device, and a pneumatic cylinder for moving the plasticizing device is connected to a pneumatic source via a switching valve, and the injection nozzle and mold are constantly connected during the molding process. A nozzle touch and nozzle moving device for an injection molding machine, characterized in that the nozzle touch and nozzle moving device are kept in close contact with each other by constant pneumatic pressure, and are crimped by hydraulic pressure during injection and pressure holding processes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18800184U JPS644498Y2 (en) | 1984-12-11 | 1984-12-11 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18800184U JPS644498Y2 (en) | 1984-12-11 | 1984-12-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61102514U JPS61102514U (en) | 1986-06-30 |
JPS644498Y2 true JPS644498Y2 (en) | 1989-02-06 |
Family
ID=30745471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18800184U Expired JPS644498Y2 (en) | 1984-12-11 | 1984-12-11 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS644498Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2588722B2 (en) * | 1987-09-02 | 1997-03-12 | 東芝機械株式会社 | Nozzle touch force adjustment method |
-
1984
- 1984-12-11 JP JP18800184U patent/JPS644498Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS61102514U (en) | 1986-06-30 |
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