JPH0243703Y2 - - Google Patents
Info
- Publication number
- JPH0243703Y2 JPH0243703Y2 JP1984195689U JP19568984U JPH0243703Y2 JP H0243703 Y2 JPH0243703 Y2 JP H0243703Y2 JP 1984195689 U JP1984195689 U JP 1984195689U JP 19568984 U JP19568984 U JP 19568984U JP H0243703 Y2 JPH0243703 Y2 JP H0243703Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- hydraulic
- pipe
- cooler
- 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.)
- Expired
Links
- 239000003921 oil Substances 0.000 claims description 46
- 239000010720 hydraulic oil Substances 0.000 claims description 36
- 238000001746 injection moulding Methods 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案は、油圧駆動の射出成形機等において、
作動油の冷却を空冷式にした射出成形機等の油圧
装置に関するものである。[Detailed description of the invention] This invention provides a hydraulically driven injection molding machine, etc.
This invention relates to a hydraulic system such as an injection molding machine in which hydraulic oil is cooled by air.
一般に、油圧力によつて型締装置、射出シリン
ダなどの駆動を制御するようにした射出成形機等
では、動力損失などに起因して油圧回路内の作動
油の温度が上昇し、それに伴い作動油の粘度が変
化して型締装置の型締力や、金型内の樹脂にかか
る圧力などが変化するため、作動油を冷却して、
その温度を一定にすることが必要である。 In general, in injection molding machines that use hydraulic pressure to control the drive of mold clamping devices, injection cylinders, etc., the temperature of the hydraulic oil in the hydraulic circuit increases due to power loss, etc. As the viscosity of the oil changes, the mold clamping force of the mold clamping device and the pressure applied to the resin inside the mold change, so the hydraulic oil is cooled and
It is necessary to keep the temperature constant.
従来、このような作動油の冷却装置としては、
例えばパイプの中に冷却水を通して作動油を冷却
するいわゆる水冷式クーラが多く適用されてい
る。 Conventionally, such hydraulic oil cooling devices are
For example, so-called water-cooled coolers, which cool hydraulic oil by passing cooling water through pipes, are often used.
ところが、このものでは冷却効率が良い反面、
冷却水を通すための配管等の冷却水設備を必要と
し、またその構造が複雑になる上、油や冷却水の
漏れに対する配慮が必要となる。 However, while this product has good cooling efficiency,
Cooling water equipment such as piping for passing the cooling water is required, the structure is complicated, and consideration must be given to leakage of oil and cooling water.
一方、空冷式にして油タンク内の作動油を、直
接、フアンクーラなどにより冷却するようにする
と、冷却効率が悪くなり、また冷却効率を向上さ
せるために、油タンクから作動油を取り出して冷
却するようにした場合、作動油を移送する配管や
ポンプ等の設備が必要となり、コスト高になるな
どの問題がある。 On the other hand, if the hydraulic oil in the oil tank is cooled directly using a fan cooler, etc., the cooling efficiency will be poor, and in order to improve the cooling efficiency, it is necessary to take out the hydraulic oil from the oil tank and cool it. In this case, equipment such as piping and pumps for transferring the hydraulic oil is required, leading to problems such as increased costs.
本考案は上記事情に鑑みて提案されたもので、
その目的とするところは、作動油をフアンの回転
により生ずる風により冷却することにより、冷却
水の設備を不要とし、その保守作業を省略すると
ともに、簡単な構造で作動油を精度よく効率的に
冷却する効果があり、コストの低下を図ることの
できる射出成形機等の油圧装置を提供することに
ある。 This idea was proposed in view of the above circumstances.
The purpose of this is to cool the hydraulic oil with the wind generated by the rotation of the fan, thereby eliminating the need for cooling water equipment and maintenance work, and allowing the hydraulic oil to be accurately and efficiently cooled with a simple structure. An object of the present invention is to provide a hydraulic device for an injection molding machine or the like that has a cooling effect and can reduce costs.
上記目的を達成するために、本考案は、油タン
ク内の作動油をモータにより駆動される油圧ポン
プで射出成形機等に備えられた駆動ユニツトに送
り配管を通じて送り、上記駆動ユニツトの作動に
働いた作動油を戻り配管で上記油タンクに戻すよ
うに構成された射出成形機等における油圧装置に
おいて、油タンクに付設された温度調節器によつ
て作動を制御されるフアンと該フアンによつて冷
却される油送管とから成る冷却器を、上記油送管
を戻り配管に接続して設け、油圧ポンプの下流側
の送り配管と冷却器の上流側の戻り配管との間
に、圧力調整弁を備えたバイパス用配管を圧力調
整弁の出口を戻り配管側に配して接続するととも
に、上記油圧ポンプのドレーンポートを冷却器の
上流側において戻り配管に接続した構成とした。 In order to achieve the above object, the present invention uses a hydraulic pump driven by a motor to send hydraulic oil in an oil tank to a drive unit provided in an injection molding machine, etc. through a feed pipe, and works to operate the drive unit. In a hydraulic system for an injection molding machine, etc., which is configured to return the hydraulic oil to the oil tank through a return pipe, a fan whose operation is controlled by a temperature controller attached to the oil tank and the fan are used. A cooler consisting of an oil feed pipe to be cooled is provided by connecting the oil feed pipe to the return pipe, and a pressure adjustment device is provided between the feed pipe on the downstream side of the hydraulic pump and the return pipe on the upstream side of the cooler. A bypass pipe equipped with a valve was connected with the outlet of the pressure regulating valve disposed on the return pipe side, and the drain port of the hydraulic pump was connected to the return pipe on the upstream side of the cooler.
本考案にかかる射出成形機等の油圧装置は、駆
動ユニツトを通つて温度が上昇した作動油を、油
タンクに戻る前にフアンによつて冷却し、作動油
の油温を一定にするものである。 The hydraulic system for injection molding machines and other devices according to the present invention uses a fan to cool the hydraulic oil whose temperature has risen through the drive unit before returning to the oil tank, thereby keeping the temperature of the hydraulic oil constant. be.
以下、本考案の一実施例を添付の図面を参照し
て説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
図において、符号１は射出成形機等に備えられ
た駆動ユニツトであり、これは油圧力により制御
される型締装置、射出スクリユーの回転装置、お
よび射出シリンダなどから構成されている。そし
て、この駆動ユニツト１には、ここに圧油（作動
油）を供給する油圧回路２が連設されている。 In the figure, reference numeral 1 denotes a drive unit provided in an injection molding machine, etc., and is comprised of a mold clamping device controlled by hydraulic pressure, an injection screw rotation device, an injection cylinder, and the like. A hydraulic circuit 2 that supplies pressure oil (hydraulic oil) is connected to the drive unit 1.
この油圧回路２は、油タンク３からストレーナ
４を通して駆動ユニツト１に作動油を移送する配
管５に、モータ６により駆動される油圧ポンプ７
が連結され、駆動ユニツト１から油タンク３に戻
る作動油を移送する配管８に作動油を冷却する冷
却器９が配設された基本構成となつている。 This hydraulic circuit 2 includes a hydraulic pump 7 driven by a motor 6 connected to a pipe 5 that transfers hydraulic oil from an oil tank 3 to a drive unit 1 through a strainer 4.
It has a basic configuration in which a cooler 9 for cooling the hydraulic oil is disposed in a pipe 8 that transfers the hydraulic oil from the drive unit 1 back to the oil tank 3.
上記油圧ポンプ７は、そのドレーンポート１１
が作動油を油タンク３に戻す配管８に冷却器９の
上流側において連結されている。 The hydraulic pump 7 has its drain port 11
is connected to a pipe 8 that returns hydraulic oil to the oil tank 3 on the upstream side of the cooler 9.
一方、上記冷却器９は、フアン１２と、該フア
ン１２の回転により生ずる風を受けて冷却せしめ
られる油送管１３とから構成されている。そして
上記フアン１２には油タンク３内の作動油を適正
温度に保つため温度調節器１４が接続され、作動
油の温度に基づいてフアン１２の作動を制御する
ようになつている。 On the other hand, the cooler 9 is composed of a fan 12 and an oil pipe 13 that is cooled by receiving the wind generated by the rotation of the fan 12. A temperature regulator 14 is connected to the fan 12 in order to maintain the hydraulic oil in the oil tank 3 at an appropriate temperature, and the operation of the fan 12 is controlled based on the temperature of the hydraulic oil.
なお、作動油を駆動ユニツト１に移送する油ポ
ンプ７の下流側の送り配管５と、冷却器９の上流
側の戻り配管８との間には、バイパス用配管１５
が連結され、該バイパス用配管１５には油圧ポン
プ７の吐出圧力を設定する圧力調整弁１６がその
出口を配管８側に配して設けられている。 Note that a bypass pipe 15 is provided between the feed pipe 5 on the downstream side of the oil pump 7 that transfers hydraulic oil to the drive unit 1 and the return pipe 8 on the upstream side of the cooler 9.
The bypass pipe 15 is provided with a pressure regulating valve 16 for setting the discharge pressure of the hydraulic pump 7 with its outlet facing the pipe 8 side.
次に、このように構成された油圧装置の作用に
ついて説明する。 Next, the operation of the hydraulic system configured as described above will be explained.
射出成形機等の駆動ユニツト１を運転する場
合、モータ６を回転させて油圧ポンプ７を駆動す
る。この操作によつて油タンク３内の作動油は配
管５を通つて駆動ユニツト１に圧送され、次いで
配管８を通つて油タンク３に戻る。また、油圧ポ
ンプ７のドレン油はドレーンポート１１を通つて
冷却器９の上流側の戻り配管８に流れるととも
に、圧力調整弁１６が作動した場合には作動油は
バイパス用配管１５を通つて冷却器９の上流側に
流れ、いずれも冷却器９を通つて油タンク３に戻
る。 When operating a drive unit 1 such as an injection molding machine, a motor 6 is rotated to drive a hydraulic pump 7. By this operation, the hydraulic oil in the oil tank 3 is forced through the pipe 5 to the drive unit 1, and then returns to the oil tank 3 through the pipe 8. Further, the drain oil of the hydraulic pump 7 flows through the drain port 11 to the return pipe 8 on the upstream side of the cooler 9, and when the pressure regulating valve 16 is activated, the hydraulic oil is cooled through the bypass pipe 15. The oil flows to the upstream side of the oil tank 9 and returns to the oil tank 3 through the cooler 9.
そして、油タンク３内の温度が適正値よりも上
昇すると、温度調節器１４が働らいてフアン１２
を動かし、油送管１３を通る作動油を冷却し、常
に作動油の温度を一定にする。したがつて、作動
油の粘度が温度上昇に起因して変化することがな
く、射出成形機等の駆動ユニツト１に対して悪影
響を及ぼすことがなく、金型内で成形される製品
を高品質なものに維持し得て、連続して射出成形
しても、成形品の品質が安定して不良品がでるこ
とがない。 When the temperature inside the oil tank 3 rises above the appropriate value, the temperature regulator 14 operates and the fan 12
is moved to cool the hydraulic oil passing through the oil feed pipe 13 and keep the temperature of the hydraulic oil constant at all times. Therefore, the viscosity of the hydraulic oil does not change due to temperature rise, and there is no adverse effect on the drive unit 1 of the injection molding machine, etc., and the products molded in the mold are of high quality. Even when injection molding is performed continuously, the quality of the molded products is stable and there are no defective products.
以上に説明したように、本考案に係る射出成形
機等における油圧装置は、油タンク内の作動油を
モータにより駆動される油圧ポンプで射出成形機
等に備えられた駆動ユニツトに送り配管を通じて
送り、上記駆動ユニツトの作動に働いた作動油を
戻り配管で上記油タンクに戻すように構成された
射出成形機等における油圧装置において、油タン
クに付設された温度調節器によつて作動を制御さ
れるフアンと該フアンによつて冷却される油送管
とから成る冷却器が上記油送管を戻り配管に接続
して設けられた構成とされているので、冷却水の
設備が不要で、その保守点検作業を省略すること
ができ、また構造が簡単で効果的に作動油を冷却
でき、コストを低下し得る等の優れた効果を有す
る。また、油圧ポンプのドレン油や圧力調整弁を
通つた作動油を直接油タンクに戻すようにする
と、ドレン油や圧力調整弁を通つた作動油の量
や、それらの油タンクへの戻し位置、つまり温度
調節器の近くか否かによつて温度調節器による冷
却器の制御精度が大きく変動する恐れがあり、ま
た冷却器によつて冷却される作動油の量が、冷却
器を通らずに油タンクに直接戻される油の分だけ
少なくなり、制御効率が低くなるという問題を有
するが、本考案においては、油圧ポンプの下流側
の送り配管と冷却器の上流側の戻り配管との間
に、圧力調整弁を備えたバイパス用配管が圧力調
整弁の出口を戻り配管側に配して接続されるとと
もに、上記油圧ポンプのドレーンポートは冷却器
の上流側において戻り配管に接続され、油圧ポン
プのドレン油と、圧力調整弁が作動した場合にお
ける作動油は、共に、冷却器を通つて油タンクに
戻される構成とされているので、作動油を一定の
温度条件に精度よくかつ効率的に保持することが
できる。したがつて、例えば射出成形機によつて
連続して製品を射出成形しても、成形品の品質が
安定して、生産性の向上を図ることができる。 As explained above, the hydraulic system in the injection molding machine, etc. according to the present invention uses a hydraulic pump driven by a motor to send hydraulic oil in the oil tank to the drive unit provided in the injection molding machine, etc. through piping. In a hydraulic system for an injection molding machine, etc., configured to return the hydraulic oil that worked for the operation of the drive unit to the oil tank through a return pipe, the operation is controlled by a temperature controller attached to the oil tank. A cooler consisting of a fan and an oil pipe cooled by the fan is installed by connecting the oil pipe to the return pipe, so there is no need for cooling water equipment. It has excellent effects such as omitting maintenance and inspection work, having a simple structure, effectively cooling the hydraulic oil, and reducing costs. In addition, if the drain oil of the hydraulic pump and the hydraulic oil that has passed through the pressure regulating valve are returned directly to the oil tank, the amount of drain oil and hydraulic oil that has passed through the pressure regulating valve, and the location of their return to the oil tank In other words, the control accuracy of the cooler by the temperature controller may vary greatly depending on whether or not it is near the temperature controller, and the amount of hydraulic fluid cooled by the cooler may be reduced without passing through the cooler. This has the problem that the amount of oil returned directly to the oil tank decreases, resulting in lower control efficiency. However, in this invention, there is a connection between the feed pipe downstream of the hydraulic pump and the return pipe upstream of the cooler. A bypass pipe equipped with a pressure regulating valve is connected with the outlet of the pressure regulating valve on the return pipe side, and the drain port of the hydraulic pump is connected to the return pipe on the upstream side of the cooler, and the hydraulic pump Both the drain oil and the hydraulic oil when the pressure regulating valve is activated are returned to the oil tank through a cooler, so the hydraulic oil can be maintained at a constant temperature accurately and efficiently. can be retained. Therefore, even if products are continuously injection molded using, for example, an injection molding machine, the quality of the molded products is stable and productivity can be improved.
図面は本考案の一実施例を示す油圧回路図であ
る。
１……駆動ユニツト、２……油圧回路、３……
油タンク、５……配管、７……油圧ポンプ、８…
…配管、９……冷却器、１２……フアン、１３…
…油送管、１４……温度調節器、１５……バイパ
ス用配管、１６……圧力調整弁。
The drawing is a hydraulic circuit diagram showing an embodiment of the present invention. 1... Drive unit, 2... Hydraulic circuit, 3...
Oil tank, 5... Piping, 7... Hydraulic pump, 8...
...Piping, 9...Cooler, 12...Fan, 13...
...Oil feed pipe, 14...Temperature regulator, 15...Bypass pipe, 16...Pressure adjustment valve.
Claims (1)
れる油圧ポンプ７で射出成形機等に備えられた駆
動ユニツト１に送り配管５を通じて送り、上記駆
動ユニツト１の作動に働いた作動油を戻り配管８
で上記油タンク３に戻すように構成された射出成
形機等における油圧装置において、油タンク３に
付設された温度調節器１４によつて作動を制御さ
れるフアン１２と該フアン１２によつて冷却され
る油送管１３とから成る冷却器９が上記油送管１
３を戻り配管８に接続して設けられ、油圧ポンプ
７の下流側の送り配管５と冷却器９の上流側の戻
り配管８との間に、圧力調整弁１６を備えたバイ
パス用配管１５が圧力調整弁１６の出口を戻り配
管８側に配して接続されるとともに、上記油圧ポ
ンプ７のドレーンポート１１は冷却器９の上流側
において戻り配管８に接続されたことを特徴とす
る射出成形機等における油圧装置。 The hydraulic oil in the oil tank 3 is sent to the drive unit 1 provided in an injection molding machine or the like by a hydraulic pump 7 driven by a motor 6 through a feed pipe 5, and the hydraulic oil that has worked on the operation of the drive unit 1 is sent to a return pipe. 8
In a hydraulic system in an injection molding machine or the like configured to return oil to the oil tank 3, the fan 12 is cooled by a fan 12 whose operation is controlled by a temperature controller 14 attached to the oil tank 3. A cooler 9 consisting of an oil feed pipe 13 is connected to the oil feed pipe 1.
3 is connected to the return pipe 8, and a bypass pipe 15 equipped with a pressure regulating valve 16 is provided between the feed pipe 5 on the downstream side of the hydraulic pump 7 and the return pipe 8 on the upstream side of the cooler 9. Injection molding characterized in that the outlet of the pressure regulating valve 16 is arranged and connected to the return pipe 8 side, and the drain port 11 of the hydraulic pump 7 is connected to the return pipe 8 on the upstream side of the cooler 9. Hydraulic equipment in machines, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984195689U JPH0243703Y2 (en) | 1984-12-24 | 1984-12-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984195689U JPH0243703Y2 (en) | 1984-12-24 | 1984-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61109714U JPS61109714U (en) | 1986-07-11 |
| JPH0243703Y2 true JPH0243703Y2 (en) | 1990-11-20 |
Family
ID=30753293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984195689U Expired JPH0243703Y2 (en) | 1984-12-24 | 1984-12-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0243703Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5644295B2 (en) * | 1971-12-31 | 1981-10-19 | ||
| JPS58109705A (en) * | 1981-12-24 | 1983-06-30 | Matsushita Electric Ind Co Ltd | Oil pressure driving gear |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6246955Y2 (en) * | 1979-09-13 | 1987-12-22 |
-
1984
- 1984-12-24 JP JP1984195689U patent/JPH0243703Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5644295B2 (en) * | 1971-12-31 | 1981-10-19 | ||
| JPS58109705A (en) * | 1981-12-24 | 1983-06-30 | Matsushita Electric Ind Co Ltd | Oil pressure driving gear |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61109714U (en) | 1986-07-11 |
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