JPH02187242A - Injection molding apparatus - Google Patents
Injection molding apparatusInfo
- Publication number
- JPH02187242A JPH02187242A JP599989A JP599989A JPH02187242A JP H02187242 A JPH02187242 A JP H02187242A JP 599989 A JP599989 A JP 599989A JP 599989 A JP599989 A JP 599989A JP H02187242 A JPH02187242 A JP H02187242A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- gate
- injection
- filling
- 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.)
- Granted
Links
- 238000001746 injection moulding Methods 0.000 title claims description 16
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 239000000155 melt Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 23
- 238000005266 casting Methods 0.000 abstract description 17
- 239000002184 metal Substances 0.000 abstract description 14
- 239000012768 molten material Substances 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005429 filling process Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 8
- 238000004512 die casting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000269319 Squalius cephalus Species 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［＃梁上の利用分野］
本発明はダイカストマシンやプラスチック用射出成形機
などの射出成形装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application on Beam] The present invention relates to an injection molding apparatus such as a die casting machine or an injection molding machine for plastics.
［従来の技術］
ダイカストマシンやプラスチック用射出成形機などの射
出成形装置において、型締された金型のキャビティ内へ
は、溶湯または溶融樹脂が射出され、これらの溶融物が
固化することによって成形品が得られる。[Prior Art] In injection molding equipment such as die casting machines and plastic injection molding machines, molten metal or molten resin is injected into the cavity of a clamped mold, and as the molten material solidifies, the molding process is completed. Goods can be obtained.
このような射出動作においては、通常、充填工程におい
ては溶融物は射出スリーブから金型内に設けられたキャ
ビティへ至るまでにゲート部と呼ばれる狭い通路を通っ
てキャビティ内へ充填されるが、充填途中の溶融物の冷
却固化を出来るだけ排除するため溶融物を高速でキャビ
ティへ送る必要があるためその途中のゲート部を狭くし
て高速充填を行なっている。In such an injection operation, normally in the filling process, the melt passes through a narrow passage called a gate part from the injection sleeve to the cavity provided in the mold, and is filled into the cavity. In order to eliminate as much as possible the cooling and solidification of the molten material in the middle, it is necessary to send the molten material to the cavity at high speed, so the gate section in the middle is narrowed to perform high-speed filling.
［発り１が解決しようとする課題１
したがって、狭い通路として設けられたゲート部は充填
工程中の高速射出時には有効的な働きをしているが、キ
ャビティへの溶融物の充填完了後の押湯工程でのシ１圧
時には、キャビティ部よりもゲート部が狭いのでゲート
部が早く冷却凝固してしまい充分な押湯効果が得られな
いという問題が発生していた。[Problem 1 to be solved by Origin 1] Therefore, although the gate part provided as a narrow passage works effectively during high-speed injection during the filling process, it At the first pressure in the hot water process, since the gate part is narrower than the cavity part, the gate part cools and solidifies faster, causing a problem in that a sufficient feeder effect cannot be obtained.
実機での調査によるとキャビティへの圧力伝達率は５０
〜６０％に低下しており（すなわち、押湯圧力の５０〜
６０％しかキャビティの溶融物へ伝わらない）、充分な
押湯が行なわれず、せっかく高い圧力を与えているにも
拘らず圧力がキャビティの溶融物に効率よく伝達するこ
とが出来ないという不都合があった。According to an investigation using an actual machine, the pressure transmission rate to the cavity is 50.
~60% (i.e. 50~60% of the feeder pressure)
Only 60% of the pressure is transferred to the molten material in the cavity), and there is a disadvantage that sufficient pressure is not applied, and even though high pressure is applied, the pressure cannot be efficiently transmitted to the molten material in the cavity. Ta.
［課題を解決するための手段］
以上述べた課題を解決するため、本発明においては、射
出成形装置として、射出成形装置の金型内に設けられた
ゲート部に対向して金型内に該ゲート部の溶解物通過面
積を拡縮しうる可動ブロックと、該可動ブロックに連接
された油圧シリンダと、該油圧シリンダのヘッド側に連
通したアキュムレータとを備えた構成とした。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides an injection molding device that includes an injection molding device that is placed in the mold opposite to a gate section provided in the mold of the injection molding device. The structure includes a movable block that can expand or contract the melt passage area of the gate, a hydraulic cylinder connected to the movable block, and an accumulator connected to the head side of the hydraulic cylinder.
また、第２の発明の射出成形装置として、射出シリンダ
の圧力信号または射出シリンダのピストンロッドの位置
信号によって第１の発明の油圧シリンダへ圧油を送給し
て油圧シリンダのピストンロッドに連結された可動ブロ
ックを後退させるように構成した。Moreover, as the injection molding apparatus of the second invention, pressure oil is fed to the hydraulic cylinder of the first invention according to a pressure signal of the injection cylinder or a position signal of the piston rod of the injection cylinder, and the apparatus is connected to the piston rod of the hydraulic cylinder. The movable block was configured to move backward.
［作用］
第１の発明の射出成形装置においては、金型内にゲート
部と対向してゲート部の溶融物通過面積を拡縮しうる可
動ブロックを設けてあり、比較的低圧の充填工程時には
可動ブロックはこれに連結される油圧シリンダのヘッド
側に充填工程時の鋳込圧力を上回るアキュムレータ封入
圧が連通されているため口ｆ動ブロックは前進位置でゲ
ート部を狭く保持され、押湯工程時には高圧の鋳込圧力
（押湯圧力）のためアキュムレータ」１人圧に打ち克っ
て可動ブロックが後退しゲート部を拡げる方向に移動す
るので、充填工程時の高速射出と押湯時の効果的な圧力
伝達を達成出来る。[Function] In the injection molding apparatus of the first invention, a movable block is provided in the mold facing the gate section and capable of expanding and contracting the melt passage area of the gate section, and is movable during the relatively low pressure filling process. Since the accumulator sealing pressure that exceeds the casting pressure during the filling process is communicated to the head side of the hydraulic cylinder connected to the block, the gate part of the mouth movement block is held narrowly in the forward position, and during the feeder process. Due to the high casting pressure (feeder pressure), the movable block overcomes the pressure of one person in the accumulator and moves in the direction of expanding the gate area, resulting in high-speed injection during the filling process and effective injection during the feeder. It is possible to achieve good pressure transmission.
また、第２の発明の射出成形装置においては、射出シリ
ンダのヘッド側の圧力信号や射出シリンダのピストンロ
ッドの位置信号を検知して、充填工程時にはゲート部を
狭く保持し、押湯工程時にはゲート部を広く保持するよ
う可動ブロックの位１肯を油圧シリンダで制御して第１
の発明と同様な作用および効果を実現したものである。In addition, in the injection molding apparatus of the second invention, the pressure signal on the head side of the injection cylinder and the position signal of the piston rod of the injection cylinder are detected, and the gate portion is held narrow during the filling process, and the gate portion is held narrow during the feeder process. The position of the movable block is controlled by a hydraulic cylinder to hold the first part widely.
This invention achieves the same functions and effects as the invention of .
［実施例］
第１図〜第５図は本発明に係る射出成形装置に係り、１
ａ図はＷＳｌの発明の実施例を示すダイカストマシンの
要部縦断面図、第２図は同じく第２の発明の実施例を示
す要部縦断面図、第３図は充填工程および押湯工程にお
けるゲートすさま量と時間および鋳込圧力と時間との関
係線図を示し、第３図（ａ）はゲートすきま量−時間関
係線図、第３図（ｂ）は鋳込圧カー時間関係線図、第４
図は鋳込圧力とゲートひらき増加量との関係線図、第５
図は可動ブロック動作説明図で、第５図（ａ）は充填工
程時、第５図（ｂ）は押湯工程時を示す。[Example] Figures 1 to 5 relate to an injection molding apparatus according to the present invention, and 1
Figure a is a vertical cross-sectional view of a main part of a die casting machine showing an embodiment of WSL's invention, Figure 2 is a vertical cross-sectional view of a main part showing an embodiment of the second invention, and Figure 3 is a filling process and a feeder process. Figure 3(a) shows the relationship between gate clearance and time and casting pressure and time, and Figure 3(a) shows the relationship between gate clearance and time, and Figure 3(b) shows the relationship between casting pressure and time. Diagram, 4th
The figure is a relationship diagram between casting pressure and gate opening increase amount.
The figures are explanatory diagrams of the operation of the movable block, with FIG. 5(a) showing the filling process and FIG. 5(b) showing the feeder process.
図において、ダイカストマシンは固定盤ｌに装着された
固定金型１ａと、可動盤２に装着されて固定金型１ａに
対し遠近方向へ進退することにより型締、型開される可
動金型２ａとを備えており、型締された両金型１ａ、２
ａの分割面３の両側には、キャビティ４が形成されてい
る。固定＠ｉのスリーブ孔には、注湯口５ａを有する射
出スリーブ５が挿入されており、その内孔とキャどティ
４とは金型１ａ、２ａに設けたスリーブ５ｂとゲート６
とを介して連通されている。In the figure, the die casting machine includes a fixed mold 1a mounted on a fixed platen 1, and a movable mold 2a mounted on a movable plate 2, which is clamped and opened by moving forward and backward with respect to the fixed mold 1a. Both molds 1a and 2 are clamped.
Cavities 4 are formed on both sides of the dividing surface 3 of a. An injection sleeve 5 having a pouring port 5a is inserted into the sleeve hole fixed @i, and the inner hole and the caddy 4 are connected to the sleeve 5b and gate 6 provided in the molds 1a and 2a.
It is communicated via.
そして、このゲート６に対向して可動金型２ａ内に可動
ブロック２０がゲート部の溶融物通過面積を拡縮できる
ように進退自在に設けられ、この１’Ｔ動フロツク２０
の背面にはフランジ状のストッパ２０ａが有り、前進限
を規制され、かつ、油圧シリンダ２２のピストンロッド
２１に連結されている。A movable block 20 is provided in the movable mold 2a facing the gate 6 so as to be able to move forward and backward so as to expand and contract the melt passage area of the gate portion.
There is a flange-shaped stopper 20a on the back surface of the hydraulic cylinder 20, which restricts the forward movement limit and is connected to the piston rod 21 of the hydraulic cylinder 22.
一方、７は射出スリーブ５と同心状に配設された射出シ
リンダであって、その油圧で進退するピストンロッド８
には射出プランジャ９がカップリング１０を介して連結
されており、この射出プランジャ９の頭部であるプラン
ジャチャブ１１は、射出スリーブ５の内孔に進退自在に
嵌合されている。このように構成されていることにより
、第１図または第２図図示の状態において、注湯口５ａ
から射出スリーブ５内へ溶湯１２を供給して射出シリン
ダ７の油圧でピストンロッド８を前進させると、プラン
ジャチップ１１が射出スリーブ５内とスリーブ５ｂ内と
で前進し、溶湯１２が押出されてゲート６を介しキャビ
ティ４内へ射出される（充填工程）、キャビティ４内へ
溶湯１２が充填され終ったら、さらに押し続ける射出シ
リンダ７の作用による押圧力によってキャビティ４内の
溶湯はさらに押されて押湯作用を受け、キャビティ４内
の溶湯はより緻密になって充填が完了する（押湯工程）
、その後、溶湯の固化、冷却を待ち、型開して固化した
鋳造品をキャビティ４から取出す（製品取出工程）。On the other hand, 7 is an injection cylinder disposed concentrically with the injection sleeve 5, and a piston rod 8 that moves forward and backward with its hydraulic pressure.
An injection plunger 9 is connected to the injection plunger 9 via a coupling 10, and a plunger chub 11, which is the head of the injection plunger 9, is fitted into an inner hole of the injection sleeve 5 so as to be movable forward and backward. With this configuration, in the state shown in FIG. 1 or 2, the pouring port 5a
When the molten metal 12 is supplied into the injection sleeve 5 and the piston rod 8 is advanced by the hydraulic pressure of the injection cylinder 7, the plunger tip 11 is advanced in the injection sleeve 5 and the sleeve 5b, and the molten metal 12 is pushed out to the gate. When the molten metal 12 is injected into the cavity 4 through the cylinder 6 (filling process), the molten metal in the cavity 4 is further pushed by the pressing force of the injection cylinder 7, which continues to press. Under the action of hot water, the molten metal in cavity 4 becomes more dense and filling is completed (boiling process)
, After that, wait for the molten metal to solidify and cool, then open the mold and take out the solidified casting from the cavity 4 (product taking out step).
以上述べた一連の射出動作における本発明の機能および
作用について説明する。The functions and effects of the present invention in the series of injection operations described above will be explained.
ｍｔの発朗については、第１図に示すように油圧シリン
ダ２２のヘッド側にアキュムレータ２２ａよりの圧油を
連通させてあり、最高鋳込圧力Ｐｍａｘの半分の値の圧
力に設定されているので５第３図（ｂ）に示すように、
充填工程（Ｔｏ〜Ｔ！間）では押湯工程（Ｔ１〜Ｔ４）
に比べて鋳込圧力が低圧であり、通常は押湯工程の最大
圧力Ｐｍａｘの半分以下であるから、充填工程では可動
ブロック２０は前進限（すなわち射出シリンダの方向）
に保持される。したがって、ゲートは第５図（ａ）に示
すように最小のすきまＳｌを保持されてキャビティへ溶
融物が充填されるので高速充填射出が実施される。As for mt firing, as shown in Fig. 1, pressure oil from the accumulator 22a is communicated with the head side of the hydraulic cylinder 22, and the pressure is set to half the maximum casting pressure Pmax. 5 As shown in Figure 3(b),
In the filling process (between To and T!), the feeder process (T1 to T4)
Since the casting pressure is low compared to , and is usually less than half of the maximum pressure Pmax in the feeder process, the movable block 20 is at the forward limit (i.e. in the direction of the injection cylinder) in the filling process.
is maintained. Therefore, as shown in FIG. 5(a), the gate maintains the minimum gap S1 and the cavity is filled with the melt, so that high-speed filling and injection can be performed.
ところが、充填完了して押湯工程に入り鋳込圧力がＰｍ
ａｘ／２に達すると（第３図の１２点）油圧シリンダの
ヘッド側の圧力であるアキュムレータ封入圧以上となり
、ピストンロッド２１、すなわち、可動ブロック２０は
後退しはじめ、ゲート部のすきま量は次第に増加し鋳込
圧力Ｐ＋ｓａｘに達した持点Ｔ３で油圧シリンダ２２の
ピストンロッド２１はヘッド側のストロークエンドに達
して停止する。この状態が第５図（ｂ）の状態である。However, after filling was completed and the feeder process started, the casting pressure was Pm.
When ax/2 is reached (point 12 in Fig. 3), the pressure on the head side of the hydraulic cylinder exceeds the accumulator sealing pressure, the piston rod 21, that is, the movable block 20 begins to retreat, and the amount of clearance at the gate gradually decreases. At point T3, where the casting pressure increases and reaches P+sax, the piston rod 21 of the hydraulic cylinder 22 reaches the stroke end on the head side and stops. This state is the state shown in FIG. 5(b).
そして、この最大すきまＳｌを保持されたまま９４出シ
リンダ７で押湯動作を継続されるのでゲート部の溶融物
の冷却固化を遅延化でき冷却固化しつつあるキャビティ
内の溶融物への圧力伝達が非常に良好に保たれる。第４
図は鋳込圧力とゲートひらき増加量との関係を示してお
り、最適ゲートひらき増加量りはＳｌ−５ｌとなる。Since the feeder operation is continued with the 94-out cylinder 7 while maintaining this maximum clearance Sl, the cooling and solidification of the molten material at the gate can be delayed, and pressure is transmitted to the molten material in the cavity that is cooling and solidifying. is kept in very good condition. Fourth
The figure shows the relationship between casting pressure and gate opening increase amount, and the optimum gate opening increase amount is Sl-5l.
以上が第１の発明の実施例の４１成および作用であるが
、第２の発明の実施例においてもほぼ同様な構成および
作用を有しているので、第１の発明の実施例と異なる点
のみ説明する。The forty-one configurations and operations of the embodiment of the first invention have been described above, but the embodiments of the second invention also have almost the same configuration and operation, so the differences from the embodiments of the first invention are as follows. I will only explain.
第２図において、油圧シリンダ２２はロッド側およびヘ
ッド側より電磁弁２３．圧力調整弁２４を経由して油圧
ポンプ２５に連通されている。そして、圧力調整弁２４
の設定圧を前述したように、例えばＰｙｘδｘ／２に選
び、充填工程中は電磁弁２３のソレノイド５ＯＬＩを励
磁しておくことにより、可動ブロック２０は前進限位置
に保持される。In FIG. 2, the hydraulic cylinder 22 is connected to the solenoid valve 23 from the rod side and the head side. It is connected to a hydraulic pump 25 via a pressure regulating valve 24. And the pressure regulating valve 24
As described above, the movable block 20 is held at the forward limit position by selecting, for example, Pyxδx/2 as the set pressure and energizing the solenoid 5OLI of the solenoid valve 23 during the filling process.
一方、充填工程が終って押湯工程に入るとき、射出シリ
ンダ７のヘッド側の圧力を検知する圧力センサ１３の信
号もしくはピストンロッド８に固設されピストンロッド
８とともに進退動するレバー８ａに取付けられたストラ
イカ８ｂとリミットスイッチｌＯとの接触により発信さ
れるピストンロッド８．換言すれば、プランジャチップ
１１の位置信号によって、電磁弁２３のソレノイド５Ｑ
Ｌ２ｃ７）励／ａ（ソレノイド５ＯＬＩ（７）非励磁）
に切替って油圧シリンダ２２のピストンロッド２１と可
動ブロック２０は後退動作に入る。可動ブロックの後退
限は油圧シリンダ２２のピストンのストロークエンドで
規制される。On the other hand, when entering the feeder process after the filling process, a signal from the pressure sensor 13 that detects the pressure on the head side of the injection cylinder 7 or a lever 8a that is fixed to the piston rod 8 and moves forward and backward together with the piston rod 8 is detected. The piston rod 8. generated by the contact between the striker 8b and the limit switch 1O. In other words, the solenoid 5Q of the electromagnetic valve 23 is activated by the position signal of the plunger chip 11.
L2c7) Energized/a (Solenoid 5OLI(7) De-energized)
Then, the piston rod 21 of the hydraulic cylinder 22 and the movable block 20 enter the backward movement. The retraction limit of the movable block is regulated by the stroke end of the piston of the hydraulic cylinder 22.
以上の動作により、第１の発明の実施例と同様に、充填
工程中にはＳＬ、押湯工程中はＳｌのゲートすきまが保
持される。押湯工程が完了して型開後製品を取出す、そ
の後、次ショｚトの型締後電磁弁２３はソレノイド５Ｏ
ＬＩが励磁され、可動ブロック２０は前進位置に復起す
る。Through the above-described operation, the gate clearance of SL is maintained during the filling process and that of SL during the feeder process, similarly to the embodiment of the first invention. After the feeder process is completed and the product is taken out after the mold is opened, the solenoid valve 23 is turned on by the solenoid 5O after mold clamping at the next shot.
LI is excited, and the movable block 20 returns to the forward position.
［発明の効果］
本発明においては、充填工程では狭いゲート状態で充填
し、高圧の押湯工程では広いゲート状態を保持できるの
で、高速射出と押湯時の良好な圧力伝達が自動的に達成
できるので鋳造欠陥のない高品質の製品が得られる。[Effect of the invention] In the present invention, filling can be performed in a narrow gate state in the filling process, and a wide gate state can be maintained in the high-pressure feeder process, so high-speed injection and good pressure transmission during the feeder process are automatically achieved. As a result, high-quality products without casting defects can be obtained.
また、操作者が可動ブロックの進退動なと煩わしい手動
操作により行なわなくても良く、確実な遠隔操作や自動
操作が可能となる。Further, the operator does not have to perform cumbersome manual operations such as moving the movable block forward or backward, and reliable remote or automatic operation is possible.
第１図〜第５図は本発明に係る射出成形装置に係り、第
１図は第１の発明の実施例を示すダイカストマシンの要
部縦断面図、第２図は同じく第２の発明の実施例を示す
要部縦断面図、第３図は充填工程および押湯工程におけ
るゲートすきま量と時間および鋳込圧力と時間との関係
線図を示し、第３図（ａ）はゲートすきま量−時間関係
線図、第３図（ｂ）は鋳込圧カー時間関係線図、第４図
は鋳込圧力とゲートひらき増加量との関係線図。
第５図は可動ブロック動作説明図で、第５図（ａ）は充
填工程時、第５図（ｂ）は押湯工程時を示す。
１ａ・・・固定金型、 ２ａ・・・可動金型、４
・・・・・・キャビティ、 ６・・・・・・ゲート
、７・・・・・・射出シリンダ。
１０・・・・・・リミットスイッチ、
１３・・・・・・圧力センサ、２０・・・・・・可動プ
ロ・ツク、２０ａ・・・ストッパ、 ２２・・・・
・・油圧シリンダ５２２ａ・・・アキュムレータ。
２３・・・・・・電磁弁、 ２４・・・・・・圧
力調整弁、２５・・・・・・油圧ポンプ。
特許用願人
宇部興産株式会社
第
図
第
図
ゲ−ｌ−ひうさ増加ｔ（ｍｍ）
手続補正書（方式）
％式％
１、 事件の表示
特願平１５９９９号
２、 発明の名称
射出成形装置
３、 補正をする者
事件との関係
郵便番号 ７５５1 to 5 relate to an injection molding apparatus according to the present invention, FIG. 1 is a vertical cross-sectional view of a main part of a die casting machine showing an embodiment of the first invention, and FIG. A vertical cross-sectional view of the main part showing an example, and FIG. 3 shows a relationship diagram between gate clearance and time and casting pressure and time in the filling process and feeder process, and FIG. 3(a) shows the relationship between gate clearance and time. - Time relationship diagram, FIG. 3(b) is a casting pressure time relationship diagram, and FIG. 4 is a relationship diagram between casting pressure and gate opening increase amount. FIG. 5 is an explanatory diagram of the operation of the movable block, with FIG. 5(a) showing the filling process and FIG. 5(b) showing the feeder process. 1a... Fixed mold, 2a... Movable mold, 4
...Cavity, 6...Gate, 7...Injection cylinder. 10... Limit switch, 13... Pressure sensor, 20... Movable protector, 20a... Stopper, 22...
...Hydraulic cylinder 522a...Accumulator. 23... Solenoid valve, 24... Pressure regulating valve, 25... Hydraulic pump. Patent applicant Ube Industries Co., Ltd. Figure Figure Game l - Height increase t (mm) Procedural amendment (method) % formula % 1. Indication of case Japanese Patent Application No. 15999 2. Name of invention Injection molding device 3. Postal code related to the case of the person making the amendment: 755
Claims (2)
向して金型内に該ゲート部の溶融物通過面積を拡縮しう
る可動ブロックと、該可動ブロックに連接された油圧シ
リンダと、該油圧シリンダのヘッド側に連通したアキュ
ムレータとを備えた射出成形装置。(1) A movable block that faces a gate provided in a mold of an injection molding device and can expand or contract the melt passage area of the gate, and a hydraulic cylinder connected to the movable block. , and an accumulator communicating with the head side of the hydraulic cylinder.
ストンロッドの位置信号により可動ブロックに連接され
た油圧シリンダのピストンロッドを後退させる請求項１
の射出成形装置。(2) Claim 1 in which the piston rod of the hydraulic cylinder connected to the movable block is retracted by a pressure signal of the injection cylinder or a position signal of the piston rod of the injection cylinder.
injection molding equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005999A JP2678933B2 (en) | 1989-01-17 | 1989-01-17 | Injection molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005999A JP2678933B2 (en) | 1989-01-17 | 1989-01-17 | Injection molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02187242A true JPH02187242A (en) | 1990-07-23 |
| JP2678933B2 JP2678933B2 (en) | 1997-11-19 |
Family
ID=11626467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1005999A Expired - Fee Related JP2678933B2 (en) | 1989-01-17 | 1989-01-17 | Injection molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2678933B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004004951A1 (en) * | 2001-05-22 | 2004-01-15 | Kabushiki Kaisha Toyota Jidoshokki | Die cast mold |
| WO2004004949A1 (en) * | 2001-05-10 | 2004-01-15 | Kabushiki Kaisha Toyota Jidoshokki | Die cast mold |
| KR100530622B1 (en) * | 2003-10-16 | 2005-11-22 | (주)서영 | A manufacture equipment for gasoline engine piston |
| JP2008238686A (en) * | 2007-03-28 | 2008-10-09 | Yushin Precision Equipment Co Ltd | Method for molding light guide plate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5227105A (en) * | 1975-08-23 | 1977-03-01 | Japanese National Railways<Jnr> | Method of preventing from receiving erroneous information in informati on transmission system having conteneous modulating location detector |
| JPS62101653U (en) * | 1985-12-16 | 1987-06-29 | ||
| JPS62259651A (en) * | 1986-05-01 | 1987-11-12 | Shoichi Kobayashi | Die castingdie having variable sectional area of gate at casting |
-
1989
- 1989-01-17 JP JP1005999A patent/JP2678933B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5227105A (en) * | 1975-08-23 | 1977-03-01 | Japanese National Railways<Jnr> | Method of preventing from receiving erroneous information in informati on transmission system having conteneous modulating location detector |
| JPS62101653U (en) * | 1985-12-16 | 1987-06-29 | ||
| JPS62259651A (en) * | 1986-05-01 | 1987-11-12 | Shoichi Kobayashi | Die castingdie having variable sectional area of gate at casting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004004949A1 (en) * | 2001-05-10 | 2004-01-15 | Kabushiki Kaisha Toyota Jidoshokki | Die cast mold |
| WO2004004951A1 (en) * | 2001-05-22 | 2004-01-15 | Kabushiki Kaisha Toyota Jidoshokki | Die cast mold |
| KR100530622B1 (en) * | 2003-10-16 | 2005-11-22 | (주)서영 | A manufacture equipment for gasoline engine piston |
| JP2008238686A (en) * | 2007-03-28 | 2008-10-09 | Yushin Precision Equipment Co Ltd | Method for molding light guide plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2678933B2 (en) | 1997-11-19 |
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