CN1413824A - 注塑机预塑、注射液压回路 - Google Patents

注塑机预塑、注射液压回路 Download PDF

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CN1413824A
CN1413824A CN 02136409 CN02136409A CN1413824A CN 1413824 A CN1413824 A CN 1413824A CN 02136409 CN02136409 CN 02136409 CN 02136409 A CN02136409 A CN 02136409A CN 1413824 A CN1413824 A CN 1413824A
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injection
oil pump
injection cylinder
valve
way oil
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CN1282536C (zh
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张建国
陆柏军
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Haitian Plastics Machinery Group
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NINGBO HAITIAN CO Ltd
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Abstract

本发明涉及一种可以同时控制注塑机预塑与注射的液压回路。注塑机预塑、注射液压回路,包括由伺服马达驱动的双向油泵、电磁换向阀、预塑油马达、单向阀、注射油缸、溢流阀,伺服马达驱动双向油泵,双向油泵一端连接电磁换向阀后一路连接预塑油马达后经单向阀回到双向油泵的另一油口,另一路与注射油缸注射腔相通,双向油泵另一端与注射油缸射退腔相连,注射油缸射退腔与注射腔间并联电磁溢流阀。其优点在于实现预塑与启闭模复合同时动作,大大缩短整机工作时间,所需油箱体积较小,油路系统发热小且所需的液压元件数量较少,油路结构紧凑、简单,因此降低了成本,降低对油液清洁度的要求,并能达到与全电气驱动注塑成型机一样的节能效果。

Description

注塑机预塑、注射液压回路
技术领域
本发明涉及一种注塑机的液压回路,特别涉及一种可以同时控制注塑机预塑与注射的液压回路。
电液混合驱动注塑成型机,整机也只有一套液压系统,用变频电机经齿轮箱减速后驱动螺杆预塑,用一个伺服比例阀控制注射、射退、背压,实现预塑与启闭模复合同时动作,但对油液清洁度要求较高,且预塑需通过变频电机和齿轮箱才能实现,因此成本较高。
全电气驱动注塑成型机,用伺服电机经同步带减速后驱动螺杆预塑,用伺服电机经同步带减速后经滚珠丝杠传动控制注射、射退、背压,实现预塑与启闭模复合同时动作,但存在滚珠丝杠易磨损、造成机器精度下降的缺点,且成本较高,难以实现高速注射。
本发明解决上述技术问题所采用的技术方案为:注塑机预塑、注射液压回路,包括由伺服马达驱动的双向油泵、电磁换向阀、预塑油马达、单向阀、注射油缸、溢流阀,伺服马达驱动双向油泵,双向油泵一端连接电磁换向阀后一路连接预塑油马达后经单向阀回到双向油泵的另一油口,另一路与注射油缸注射腔相通,双向油泵另一端与注射油缸射退腔相连,注射油缸射退腔与注射腔间并联电磁溢流阀。
如上所述的注射油缸射退腔与注射腔间并联的电磁溢流阀最好为电磁比例溢流阀。
与现有技术相比,本发明的优点在于能够实现注塑机预塑与启闭模复合同时动作,大大缩短整机工作时间,所需油箱体积较小,油路系统发热小且所需的液压元件数量较少,油路结构紧凑、简单,因此降低了成本,降低对油液清洁度的要求,并能达到与全电气驱动注塑成型机一样的节能效果,无多余的能量损失和浪费。
如图1所示,伺服马达MTR驱动双向油泵P,双向油泵P一端连接电磁换向阀V1后一路连接预塑油马达M后经单向阀V3回到双向油泵P的另一油口,另一路与注射油缸C注射腔(有杆腔C1)相通,双向油泵P另一端与注射油缸C射退腔(无杆腔C2)相连,注射油缸C射退腔(无杆腔C2)与注射腔(有杆腔C1)间并联电磁比例溢流阀V2,溢流阀V6、V7分别与双向油泵P的二个油口连接。
预塑时,伺服马达MTR正转,驱动双向油泵P,同时电磁铁D1断电、比例电磁铁D2根据预塑背压要求按比例输入电流,油泵一油口输出的压力油经换向阀V1驱动预塑油马达M,预塑油马达回油经单向阀V3回到双向油泵P的另一油口;在预塑时螺杆边旋转边后退,带动注射油缸活塞后退,有杆腔油液在克服溢流阀V2设定的预塑背压后向注射油缸无杆腔补油,由于存在油缸面积差和各种泄漏,油液不足部分由油箱经液控单向阀V5向注射油缸无杆腔和双向油泵吸油口补油。
注射及保压时,伺服马达MTR正转,驱动双向油泵P,同时电磁铁D1通电、比例电磁铁D2输入最大电流,因此油泵输出的压力经换向阀V1到达注射油缸有杆腔,实现注射保压动作,注射油缸无杆腔的回油一部分被双向油泵P的吸油口吸取,另一部分经液控单向阀V5向油箱回油。
射退时,伺服马达MTR反转,驱动双向油泵P,同时电磁铁D1通电、比例电磁铁D2输入最大电流,油泵一油口输出的压力油进入注射油缸无杆腔,实现射退动作;注射油缸有杆腔的回油经换向阀V1被双向油泵P的吸油口吸取,双向油泵P吸油口吸油不足部分由油箱中油液经单向阀V4补给。

Claims (2)

1.注塑机预塑、注射液压回路,包括由伺服马达驱动的双向油泵、电磁换向阀、预塑油马达、单向阀、注射油缸、溢流阀,其特征在于:伺服马达驱动双向油泵,双向油泵一端连接电磁换向阀后一路连接预塑油马达后经单向阀回到双向油泵的另一油口,另一路与注射油缸注射腔相通,双向油泵另一端与注射油缸射退腔相连,注射油缸射退腔与注射腔间并联电磁溢流阀。
2.如权利要求1所述的注塑机预塑、注射液压回路,其特征在于:所述的注射油缸射退腔与注射腔间并联的电磁溢流阀为电磁比例溢流阀。
CN 02136409 2002-08-06 2002-08-06 注塑机预塑、注射液压回路 Expired - Lifetime CN1282536C (zh)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101396862B (zh) * 2008-10-15 2010-06-09 无锡海天机械有限公司 注塑机注射油路系统
CN102729439A (zh) * 2012-06-11 2012-10-17 无锡天惠塑机有限公司 预塑阀板集成装置
CN102814956A (zh) * 2012-06-11 2012-12-12 无锡天惠塑机有限公司 注塑机注射集成装置
CN101758607B (zh) * 2009-12-18 2013-06-26 东华机械有限公司 肘杆式注塑机的快速开合模控制结构及控制方法
CN105485075A (zh) * 2016-02-24 2016-04-13 益阳新华美机电科技有限公司 炼胶机滚筒液压驱动控制系统及控制方法
CN106042312A (zh) * 2016-07-06 2016-10-26 瑞安市兴中皮革机械有限公司 预塑发泡比例注射机
WO2017114442A1 (zh) * 2015-12-29 2017-07-06 博创智能装备股份有限公司 刹车控制油路

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101396862B (zh) * 2008-10-15 2010-06-09 无锡海天机械有限公司 注塑机注射油路系统
CN101758607B (zh) * 2009-12-18 2013-06-26 东华机械有限公司 肘杆式注塑机的快速开合模控制结构及控制方法
CN102729439A (zh) * 2012-06-11 2012-10-17 无锡天惠塑机有限公司 预塑阀板集成装置
CN102814956A (zh) * 2012-06-11 2012-12-12 无锡天惠塑机有限公司 注塑机注射集成装置
CN102814956B (zh) * 2012-06-11 2014-08-20 无锡天惠塑机有限公司 注塑机注射集成装置
WO2017114442A1 (zh) * 2015-12-29 2017-07-06 博创智能装备股份有限公司 刹车控制油路
CN105485075A (zh) * 2016-02-24 2016-04-13 益阳新华美机电科技有限公司 炼胶机滚筒液压驱动控制系统及控制方法
CN106042312A (zh) * 2016-07-06 2016-10-26 瑞安市兴中皮革机械有限公司 预塑发泡比例注射机
CN106042312B (zh) * 2016-07-06 2018-03-20 瑞安市兴中实业有限公司 预塑发泡比例注射机

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