JPH0454828U - - Google Patents
Info
- Publication number
- JPH0454828U JPH0454828U JP9784890U JP9784890U JPH0454828U JP H0454828 U JPH0454828 U JP H0454828U JP 9784890 U JP9784890 U JP 9784890U JP 9784890 U JP9784890 U JP 9784890U JP H0454828 U JPH0454828 U JP H0454828U
- Authority
- JP
- Japan
- Prior art keywords
- discharge pump
- circuit
- variable discharge
- variable
- molding machine
- 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 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
第１図は本考案の実施例に係る射出成形機の油
圧回路の回路図、第２図は第１図の場合の切換位
置と充填速度及び圧力との関係を示す線図、第３
図は従来における射出成形機の油圧回路図、第４
図は第３図の場合の切換位置と充填速度及び圧力
との関係を示す線図、第５図は他の従来例の射出
成形機における油圧回路図、第６図は第５図の場
合の切換位置と充填速度及び圧力との関係を示す
線図、第７図は第５図の従来例の問題点を一部解
決する従来の要部を示す油圧回路図である。
図の主要部分の説明、１……射出シリンダ、２
……射出ラム、３……射出ラム位置センサ、４…
…制御装置、５……流量弁、６……比例電磁式リ
リーフ弁、７……可変吐出ポンプ、９……リリー
フ弁、１０……方向切換弁、１１……固定吐出ポ
ンプ、１２……チエツク弁、１３……サージ吸収
弁、１４……チエツク弁、１５……負荷感応回路
、１０１……接続回路。
Fig. 1 is a circuit diagram of the hydraulic circuit of an injection molding machine according to an embodiment of the present invention, Fig. 2 is a diagram showing the relationship between the switching position, filling speed, and pressure in the case of Fig. 1;
The figure is a hydraulic circuit diagram of a conventional injection molding machine.
The figure is a diagram showing the relationship between the switching position, filling speed and pressure in the case of Fig. 3, Fig. 5 is a hydraulic circuit diagram of another conventional injection molding machine, and Fig. 6 is a diagram showing the relationship between the switching position and the filling speed and pressure in the case of Fig. 5. FIG. 7 is a diagram showing the relationship between the switching position, filling speed, and pressure, and FIG. 7 is a hydraulic circuit diagram showing the main parts of a conventional example that partially solves the problems of the conventional example shown in FIG. Explanation of the main parts of the figure, 1... Injection cylinder, 2
...Injection ram, 3...Injection ram position sensor, 4...
...Control device, 5...Flow rate valve, 6...Proportional electromagnetic relief valve, 7...Variable discharge pump, 9...Relief valve, 10...Directional switching valve, 11...Fixed discharge pump, 12...Check Valve, 13...Surge absorption valve, 14...Check valve, 15...Load sensitive circuit, 101...Connection circuit.
Claims (1)
成形機の油圧回路において、可変吐出ポンプの負
荷感応回路の圧力制御パイロツトラインと固定吐
出ポンプのアンロード回路のリリーフ弁のベント
ラインとを固定吐出ポンプのロード、アンロード
を切換える方向切換弁を介して接続し、可変吐出
ポンプの負荷感応回路の比例電磁式リリーフ弁に
より可変吐出ポンプと固定吐出ポンプの両者の吐
出圧力制御を行なうことを特徴とする射出成形機
の油圧回路。 In the hydraulic circuit of an injection molding machine equipped with a variable discharge pump and a fixed discharge pump, the pressure control pilot line of the load sensitive circuit of the variable discharge pump and the vent line of the relief valve of the unload circuit of the fixed discharge pump are connected to the pressure control pilot line of the load sensitive circuit of the variable discharge pump. An injection system characterized in that the discharge pressure of both the variable discharge pump and the fixed discharge pump is controlled by the proportional electromagnetic relief valve of the load sensing circuit of the variable discharge pump, which is connected through a directional switching valve that switches between loading and unloading. Hydraulic circuit of molding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9784890U JPH0732029Y2 (en) | 1990-09-18 | 1990-09-18 | Hydraulic circuit of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9784890U JPH0732029Y2 (en) | 1990-09-18 | 1990-09-18 | Hydraulic circuit of injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0454828U true JPH0454828U (en) | 1992-05-11 |
| JPH0732029Y2 JPH0732029Y2 (en) | 1995-07-26 |
Family
ID=31838572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9784890U Expired - Fee Related JPH0732029Y2 (en) | 1990-09-18 | 1990-09-18 | Hydraulic circuit of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732029Y2 (en) |
-
1990
- 1990-09-18 JP JP9784890U patent/JPH0732029Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0732029Y2 (en) | 1995-07-26 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |