CN1254612C - 压力调节式注塑模用油压汽缸的油压自动调节装置及方法 - Google Patents

压力调节式注塑模用油压汽缸的油压自动调节装置及方法 Download PDF

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CN1254612C
CN1254612C CNB021084602A CN02108460A CN1254612C CN 1254612 C CN1254612 C CN 1254612C CN B021084602 A CNB021084602 A CN B021084602A CN 02108460 A CN02108460 A CN 02108460A CN 1254612 C CN1254612 C CN 1254612C
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柳永熙
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Abstract

本发明提供一种用于将合成树脂注塑成型的注塑模用热流道的油压汽缸的油压自动调节装置及其方法。在汽缸的下侧和上侧分别设置供油管的供给部和排出部，所述油用于使阀门本体的活塞动作，在其两侧的汽缸壁上，于下侧和上侧分别开设压力调节组件安装用孔，这些孔内插入有维持事先按流体力学原理计算得到的适当压力的压力调节头，各压力调节头的下端和上端设置有压力调节弹簧，并固定有喷嘴固定装置。

Description

压力调节式注塑模用油压汽缸的油压自动调节装置及方法
技术领域
本发明涉及将合成树脂注塑成型的注塑模用热流道所用的油压汽缸构造，特别涉及通过把压力调节组件设置在位于汽缸上端和下端的出口管线上，当出现过载时，自动地减压，能够防止活塞作无效动作，同时能够防止汽缸内的油碳化的注塑成型模具用油压汽缸。
背景技术
通常，用于注塑模的阀门系统用油压汽缸在计算出适合于阀杆动作的合适尺寸后，才制作并使用的。然而，由于注塑操作者能够在现场容易地改变油压，因此，随着油压的改变，活塞的推力也变化，当推力增加过大时，存在着会对与喷嘴接触的滑门部位等的模具损伤的缺点。另外，即使是系统自身，也经常有故障发生。
此外，由于该热流道用油压汽缸与加热的热流道系统紧密接触，因此，存在着使活塞动作的油被加热后易发生碳化现象的问题。
若更详细地叙述，由于用于模具的热流道系统用(Hot Runner System)汽缸的口径比较小，因此，在汽缸内动作的动作油量不过数十mm。
但是，由于这些油滞溜在加热的活塞内，因此，存在着容易失去品质特性或碳化的问题。
另外，流入的油会留在长长的油压回路内，且反复发生流入或流出活塞的现象，为了防止这种现象的发生，一个汽缸驱动就需要4个螺线管。
而且，在流入汽缸内的油因活塞的上下动作而被排出时，为了使油不穿过注入口侧，而有必要在注入口侧设置螺线管，也有必要在出口侧设置螺线管，使油只朝一个方向流动。
然而，这种方式使油压回路变得复杂，且把油压汽缸装到小型模具上时，存在着空间设置上受到限制，且不能容易地设置螺线管的问题。
发明内容
鉴于上述问题，本发明的目的在于把2个压力调节喷嘴组件设置在油压汽缸的壁上，当根据预先计算的压力调节弹簧的弹性力和压力调节调节头的截面积设定的压力以上的油压作用于活塞上时，压力调节喷嘴组件就打开压力调节调节头排出油，从而，作用于活塞内部的实际压力能够维持恒定。
另外，本发明的另一目的在于使由压力调节组件放出的油能够无间隔地源源不断流入汽缸内，从而能够防止汽缸内油因汽缸周围的热流道系统加热碳化现象发生。
为了完成上述目的，本发明提供一种由以下步骤构成的压力调节式注塑模用油压汽缸的油压自动调节方法，其包括以下步骤：供给油压的步骤；由油压使汽缸上升的步骤；在汽缸内部发生过负荷时，在油压的作用下调节头一边压缩弹簧一边上升的步骤；因调节头上升动作而打开流路，流体从排出口排出的步骤；和因流体的排出使阀内部压力降低并低于弹簧压力时，因弹簧的弹力作用使调节头下降而关闭流路的步骤。
下面，参照附图详细说明本发明。
附图说明
图1是表示本发明优选实施例的注塑模用油压汽缸的油压调节装置的构造断面图；
图2是本发明的油压汽缸的阀门本体的放大断面图。
具体实施方式
图1是表示本发明优选实施例的注塑模用油压汽缸的油压调节装置的构造断面图，图2是本发明的油压汽缸的阀门本体的放大断面图。
若根据结构的构成来考虑本发明，如图所示，用于热流道阀门系统的热流道油压汽缸中，在其下侧和上侧分别构成供油管的供给部3和排出部4，所述油用于使阀门本体1的活塞2动作，在其两侧的汽缸壁上，于下侧和上侧分别开设压力调节组件安装用孔5、6，把压力调节头7、8插入这些孔5、6内，该压力调节头7、8维持事先按流体力学原理计算得到的适当压力，压力调节弹簧9、10设置在各压力调节头7、8的下端和上端，并固定有喷嘴固定装置11、12。未说明的符号13是阀杆。
下面，说明具有这种构成的本发明的动作。
当从设置在阀本体1的下端一侧的供给部3提供油时，油流入阀体的内部，由此，在油压作用下，连接于阀本体内部的活塞2上升。此时，排出部4一侧的调节头8受连接于上侧的压力调节弹簧10的弹力作用而关闭孔6。
因此，在活塞2上升到最大程度的状态下，当注入阀本体内部的油压力大于设定压力，即大于设置在排出口4侧的孔6内的压力调节弹簧10的压力时，油顶住调节头8并推动它。由此，调节头8一边压缩压力调节弹簧10一边上升，而开放孔6。
在孔6开放的同时，位于阀内部的油经孔6从排出口4排出，因此，阀本体1的内部压力下降。与此同时，当阀本体的内部压力下降到低于压力调节弹簧10的弹力时，因压力调节弹簧的弹力作用，调节头8自动下降，而关闭孔6。
另一方面，在使活塞2下降的情况下，上述压力调节方式逆向作用，供油管发生逆流，因此，通过上述逆向动作，能够把阀内部的压力调节到恒定。
附加地，活塞2下降时，油从上侧排出口4流入，因此，活塞2下降。此时，与上升时一样，由于压力高于加压设定值的油经压力调节喷嘴7放出，因此，活塞2不会发生过大的压力，可确保组件自身的耐久性，以适当压力调节阀杆的动作，就能够保证热流模具的阀门寿命。
如上所述，因为本发明分别在供给部和排出部设置有自动压力调节装置，所以虽然仅设置并利用下降用螺线管和上升用螺线管这二个螺线管，但仍能具有使一定量的油仅朝一个方向流动的作用。
上面，以优选实施例说明了本发明，但该技术领域的普通技术人员在不脱离权利要求所记载的本发明的构思及领域的范围内能够对本发明作出各种不同的修改及变更。
如上所述，根据本发明，在油压缸的壁上设置2个压力调节喷嘴组件，当根据预先计算的压力调节弹簧的弹性力和压力调节调节头的截面积设定的压力以上的油压作用于活塞上时，压力调节喷嘴组件就打开压力调节调节头排出油，从而，作用于活塞内部的实际压力能够维持为恒定，其构造简单，制作容易，并通过把汽缸调节用螺线管的数量减半，能够降低制作成本，还能自动调节阀内部的压力，因此，本发明能够以简单的构造使汽缸内的油循环，防止油炭化。

Claims (3)

1、一种压力调节式注塑模用油压汽缸的油压自动调节方法，其特征在于包括以下步骤：
供给油压的步骤；
由油压使汽缸上升的步骤；
在汽缸内部发生过负荷时，在油压的作用下调节头一边压缩弹簧一边上升的步骤；
因调节头上升动作而打开流路，流体从排出口排出的步骤；和
因流体的排出使阀内部压力降低并低于弹簧压力时，因弹簧的弹力作用使调节头下降而关闭流路的步骤。
2、一种压力调节式注塑模用油压汽缸的油压自动调节装置，具有用于热流道阀门系统上的热流道油压汽缸，在汽缸的下侧和上侧分别构成供油管的供给部(3)和排出部(4)，所述油用于使阀门本体(1)的活塞(2)动作，其特征在于，在其两侧的汽缸壁上，于下侧和上侧分别开设压力调节组件安装用孔(5、6)，这些孔(5、6)内插入有维持事先按流体力学原理计算得到的适当压力的压力调节头(7、8)，各压力调节头(7、8)的下端和上端设置有压力调节弹簧(9、10)，并固定有喷嘴固定装置(11、12)。
3、根据权利要求2所述的压力调节式注塑模用油压汽缸的油压自动调节装置，其特征在于压力调节组件分别设置在出口侧上。
CNB021084602A 2001-11-28 2002-04-01 压力调节式注塑模用油压汽缸的油压自动调节装置及方法 Expired - Fee Related CN1254612C (zh)

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CN105840585B (zh) * 2016-05-24 2017-10-31 中国工程物理研究院总体工程研究所 用于活塞冷却喷嘴性能实验台架的供油液压调节装置
CN108943606A (zh) * 2018-08-15 2018-12-07 杭州超特科技有限公司 一种热流道的液压缸机构及油液循环方法
CN110233296B (zh) * 2019-07-12 2024-04-12 国兴(东莞)新能源科技有限公司 一种软包锂离子电池封装机构
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CN115674608B (zh) * 2023-01-03 2023-05-09 山西斯普瑞机械制造股份有限公司 一种硫化鞋机开合模自调专用阀

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KR100446819B1 (ko) 2004-09-01
CN1421617A (zh) 2003-06-04
KR20030043354A (ko) 2003-06-02
EP1316405B1 (en) 2004-11-03
JP3833947B2 (ja) 2006-10-18
JP2003165143A (ja) 2003-06-10
DE60201810T2 (de) 2006-03-16
DE60201810D1 (de) 2004-12-09
ES2231595T3 (es) 2005-05-16
ATE281293T1 (de) 2004-11-15
US20030098519A1 (en) 2003-05-29
EP1316405A1 (en) 2003-06-04

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