JPS62174125A - Injection molder equipped with controlling means for air pressure in cavity - Google Patents
Injection molder equipped with controlling means for air pressure in cavityInfo
- Publication number
- JPS62174125A JPS62174125A JP1480086A JP1480086A JPS62174125A JP S62174125 A JPS62174125 A JP S62174125A JP 1480086 A JP1480086 A JP 1480086A JP 1480086 A JP1480086 A JP 1480086A JP S62174125 A JPS62174125 A JP S62174125A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- pressure
- injection
- air pressure
- injection molding
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 33
- 239000007924 injection Substances 0.000 title claims abstract description 33
- 238000001746 injection moulding Methods 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は射出成形機に関し、特に射出成形キャビティの
圧力を制御する圧力制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection molding machine, and more particularly to a pressure control device for controlling the pressure in an injection molding cavity.
（従来の技術）
射出成形機では、固定金型に対して可動金型を移動させ
て、型閉した後、固定金型と可動金型とによって成形さ
れる射出成形用キャビティ内に射出シリンダからプラス
チック（樹脂）が射出制御されて注入される。そして、
このプラスチックは射出成形キャビティ内で所定の形状
に成形された後、型開して取り出される。(Prior art) In an injection molding machine, a movable mold is moved relative to a fixed mold, and after the mold is closed, an injection cylinder is inserted into an injection molding cavity formed by the fixed mold and the movable mold. Plastic (resin) is injected under injection control. and,
This plastic is molded into a predetermined shape within an injection molding cavity, and then the mold is opened and removed.
（発明が解決しようとする問題点）
ところで、射出成形機でプラスチックを射出成形する場
合、射出成形キャビティにグラスチックが完全に充填さ
れ、これによって、プラスチックの流れが停止させられ
ると、射出による慣性を有しているプラスチックの流れ
が急に停止することになるから、第４図に示すように射
出成形キャビティ内の圧力が急激に変化する。その結果
、成形品の外観２寸法精度、及び強度が悪くなるという
問題点がある。(Problem to be Solved by the Invention) By the way, when plastic is injection molded using an injection molding machine, if the injection molding cavity is completely filled with plastic and the flow of plastic is stopped, the inertia due to injection Since the flow of plastic having . As a result, there is a problem in that the external dimensional accuracy and strength of the molded product deteriorate.
発明の目的は外観２寸法精度、及び強度が良好な成形品
を得ることのできる射出成形機を提供することにある。An object of the invention is to provide an injection molding machine that can produce molded products with good two-dimensional accuracy in appearance and strength.
（問題点を解決するための手段）
本発明による射出成形機は固定金型と、該固定金型に対
して進退自在に設けられ、前記固定金型とともにキャビ
ティを形成する移動金型と、該キャビティに樹脂を射出
するための射出手段とを備える射出成形機において、前
記キャビティの圧力を調節するためのキャビティ圧力調
整手段と、該キャビティの圧力を検知する圧力検知手段
と、前記キャビティ圧力調整手段及び前記射出手段を制
別する制御手段とを有し、該制御手段は前記圧力検知手
段で検知されたキャビティ圧力に基づいて前記キャビテ
ィ圧力調整手段によるキャビティ圧力調整及び射出手段
の射出速度を制御するようにしたことを特徴としている
。(Means for Solving the Problems) An injection molding machine according to the present invention includes a fixed mold, a movable mold that is movable forward and backward with respect to the fixed mold and forms a cavity together with the fixed mold, and An injection molding machine comprising an injection means for injecting resin into a cavity, a cavity pressure adjustment means for adjusting the pressure of the cavity, a pressure detection means for detecting the pressure of the cavity, and the cavity pressure adjustment means. and a control means for regulating the injection means, the control means controlling the cavity pressure adjustment by the cavity pressure adjustment means and the injection speed of the injection means based on the cavity pressure detected by the pressure detection means. It is characterized by the fact that
以下金目 （実施例） 以下本発明について実施例によって説明する。Below is gold (Example) The present invention will be explained below with reference to Examples.
第１図を参照して、固定金型１に対して進退自在に可動
金型２が配設されており、固定金型１の中央部にはプラ
スチックを注入（射出）するためのスプール３が形成さ
れている。このスプール３は固定金型１と可動金型２と
によって形成される射出成形用のキャビティ４に連通し
ている。スプール３には射出シリンダ５が連結されてお
り、この射出シリンダ５内のピストン６は射出用アクチ
ュエータ７に連結されている。そして、この射出シリン
ダ５から射出成形用のキャビティ４にプラスチックが注
入される。Referring to FIG. 1, a movable mold 2 is arranged to be able to move forward and backward with respect to a fixed mold 1, and a spool 3 for injecting (injecting) plastic is provided in the center of the fixed mold 1. It is formed. This spool 3 communicates with an injection molding cavity 4 formed by a fixed mold 1 and a movable mold 2. An injection cylinder 5 is connected to the spool 3, and a piston 6 within the injection cylinder 5 is connected to an injection actuator 7. Then, plastic is injected from this injection cylinder 5 into the injection molding cavity 4.
移動金型２にはキャビティ４に連結された空気圧加減用
管路８が３本形成されておシ、これら空気圧加減用管路
８はキャビティ内空気圧調節装置９に連結されている。Three air pressure adjustment conduits 8 are formed in the movable mold 2 and are connected to the cavity 4, and these air pressure adjustment conduits 8 are connected to a cavity air pressure adjustment device 9.
可動金型２内には圧力センサ１０が配設されており、こ
の圧力センサ１０の圧力検出端１０ａ 、１０ｂ 、及
び１０ｃはそれぞれ各空気圧加減用管路８内に配設され
ている。この圧力センサ１０は制御装置１１に連結され
ており、この制御装置１１によってキャビティ内空気圧
調節装置９及び射出用アクチュエータ７が制御される。A pressure sensor 10 is disposed within the movable mold 2, and pressure detection ends 10a, 10b, and 10c of this pressure sensor 10 are disposed within each air pressure adjustment conduit 8, respectively. This pressure sensor 10 is connected to a control device 11, which controls the intra-cavity air pressure adjustment device 9 and the injection actuator 7.
次に、上述した射出成形機の動作について第１図、及び
第２図（ａ）〜（ｄ）を参照して説明する。Next, the operation of the injection molding machine described above will be explained with reference to FIG. 1 and FIGS. 2(a) to (d).
射出成形を行う場合、まず、固定金型１と可動金型２と
を型閉めする。型閉めが終了すると、制御装置１１から
の指令により射出用アクチュエータ７が制御され、射出
用アクチュエータ７によってピストン６を駆動し、射出
用シリンダ５からプラスチックがスプール３を通ってキ
ャピテイ４に注入されていく（第２図（ａ））。When performing injection molding, first, the fixed mold 1 and the movable mold 2 are closed. When the mold closing is completed, the injection actuator 7 is controlled by a command from the control device 11, and the piston 6 is driven by the injection actuator 7, and the plastic is injected from the injection cylinder 5 through the spool 3 into the cavity 4. (Figure 2 (a)).
制御装置１１には予め設定された樹脂圧力（樹脂圧力目
標値）が入力されており、制御装置１１は圧力センサー
１０によって検知されたキャビティ内空気圧と樹脂圧力
目標値とが一致するようにキャビティ内空気圧調節装置
９及び射出用アクチュエータ７を制御する。A preset resin pressure (resin pressure target value) is input to the control device 11, and the control device 11 adjusts the pressure inside the cavity so that the air pressure inside the cavity detected by the pressure sensor 10 matches the resin pressure target value. Controls the air pressure adjustment device 9 and the injection actuator 7.
即ち、キャビティ４にプラスチック（樹脂）が注入され
ていくと、制御装置１１はキャビティ内空気圧調節装置
９に対してキャビティ４内の空気圧を加圧するように指
令する（第２図（ｂ））。その後、制御装置１１によっ
てキャビティ内空気圧調節装置９によるキャビティ４の
加減圧操作と射出用アクチュエータ７による樹脂の加減
速操作とを行う（この加減圧操作と加減速操作とは樹脂
圧力が急変動しないようにかつ樹脂の慣性が徐々に減少
するように行われる／（第２図（ｃ）））。／射出用ｆ
そしてキャビティ内空気圧は樹脂圧力目標値に保たれる
。That is, as plastic (resin) is injected into the cavity 4, the control device 11 instructs the cavity air pressure adjusting device 9 to increase the air pressure inside the cavity 4 (FIG. 2(b)). Thereafter, the control device 11 controls the cavity air pressure adjustment device 9 to increase or decrease the pressure in the cavity 4, and the injection actuator 7 to accelerate or decelerate the resin. This is done in such a way that the inertia of the resin gradually decreases (FIG. 2(c))). /Injection f
The air pressure inside the cavity is maintained at the resin pressure target value.
固定金型１と可動金型２とによって形成されるキャピテ
イ４内の圧力を樹脂圧力目標値と一致するように制御し
ているから、従来、樹脂充填完了時に生じた急激な局部
的圧力変動が生じることがない。即ち、第３図に示すよ
うにキャビティ４に樹脂を充填した後の樹脂圧力の変動
がなめらかになる。Since the pressure inside the cavity 4 formed by the fixed mold 1 and the movable mold 2 is controlled to match the resin pressure target value, the sudden local pressure fluctuation that conventionally occurs when resin filling is completed is avoided. It never occurs. That is, as shown in FIG. 3, fluctuations in the resin pressure after the cavity 4 is filled with resin become smooth.
（発明の効果）
以上説明したように本発明の射出成形機ではキャビティ
内圧力が予め設定された樹脂圧力と一致するようにキャ
ビティ内空気圧調整装置及び射出用アクチュエータを制
御しているから、キャビティ内圧力が急激に変化するこ
とがない。従って。(Effects of the Invention) As explained above, in the injection molding machine of the present invention, the cavity air pressure adjustment device and the injection actuator are controlled so that the cavity pressure matches the preset resin pressure. Pressure does not change suddenly. Therefore.
外観９寸法精度、及び強度のすぐれた成形品を得ること
ができる。A molded product with excellent appearance 9 dimensional accuracy and strength can be obtained.
第１図は本発明による射出成形機の一実施例を概略的に
示す図、第２図（ａ）〜（ｄ）はキャビティ内空気圧の
制御を説明するための図、第３図は本発明の射出成形機
によるキャビティ樹脂圧力を示す図。
第４図は従来の射出成形機によるキャビティ樹脂圧力を
示す図である。
１・・・固定金型、２・・・移動金型、３・・・スプー
ル。
４・・・キャビティ、５・・・射出用シリンダー、６・
・・ピストン、７・・・射出用アクチュエータ、８・・
・空気圧加減用管路、９・・・キャビティ内空気圧調節
装置。
１０・・・圧力センサー、１１・・・制御装置。
第２図（ａ）
第２図（Ｃ）
第２図（ｄ）FIG. 1 is a diagram schematically showing an embodiment of an injection molding machine according to the present invention, FIGS. 2(a) to (d) are diagrams for explaining control of air pressure inside the cavity, and FIG. 3 is a diagram showing an embodiment of the injection molding machine according to the present invention. FIG. 3 is a diagram showing cavity resin pressure by an injection molding machine. FIG. 4 is a diagram showing cavity resin pressure by a conventional injection molding machine. 1...Fixed mold, 2...Moveable mold, 3...Spool. 4... Cavity, 5... Injection cylinder, 6...
...Piston, 7...Injection actuator, 8...
- Pipe line for adjusting air pressure, 9...Intra-cavity air pressure adjusting device. 10...Pressure sensor, 11...Control device. Figure 2 (a) Figure 2 (C) Figure 2 (d)
Claims (1)
れ、前記固定金型とともにキャビティを形成する移動金
型と、該キャビティに樹脂を射出するための射出手段と
を備える射出成形機において、前記キャビティの圧力を
調節するためのキャビティ圧力調整手段と、該キャビテ
ィの圧力を検知する圧力検知手段と、前記キャビティ圧
力調整手段及び前記射出手段を制御する制御手段とを有
し、該制御手段は前記圧力検知手段で検知されたキャビ
ティ圧力に基づいて前記キャビティ圧力調整手段による
キャビティ圧力調整及び射出手段の射出速度を制御する
ようにしたことを特徴とするキャビティ内空気圧制御手
段を有する射出成形機。1. Injection molding comprising a fixed mold, a movable mold that is movable forward and backward relative to the fixed mold and forms a cavity together with the fixed mold, and injection means for injecting resin into the cavity. The machine includes a cavity pressure adjustment means for adjusting the pressure in the cavity, a pressure detection means for detecting the pressure in the cavity, and a control means for controlling the cavity pressure adjustment means and the injection means, Injection comprising a cavity air pressure control means, wherein the control means controls the cavity pressure adjustment by the cavity pressure adjustment means and the injection speed of the injection means based on the cavity pressure detected by the pressure detection means. Molding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1480086A JPS62174125A (en) | 1986-01-28 | 1986-01-28 | Injection molder equipped with controlling means for air pressure in cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1480086A JPS62174125A (en) | 1986-01-28 | 1986-01-28 | Injection molder equipped with controlling means for air pressure in cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62174125A true JPS62174125A (en) | 1987-07-30 |
| JPH0431487B2 JPH0431487B2 (en) | 1992-05-26 |
Family
ID=11871120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1480086A Granted JPS62174125A (en) | 1986-01-28 | 1986-01-28 | Injection molder equipped with controlling means for air pressure in cavity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62174125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009292076A (en) * | 2008-06-06 | 2009-12-17 | Apic Yamada Corp | Transfer molding device and transfer molding method using the same |
-
1986
- 1986-01-28 JP JP1480086A patent/JPS62174125A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009292076A (en) * | 2008-06-06 | 2009-12-17 | Apic Yamada Corp | Transfer molding device and transfer molding method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0431487B2 (en) | 1992-05-26 |
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