CN1902037A - 用于喷嘴的阀销引导头 - Google Patents
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
一种注射模制装置,包括歧管和喷嘴,喷嘴容纳在模板的开口中,并且包括用于从歧管通道接受熔料流的喷嘴通道,喷嘴通道和第一轴线对准。喷嘴头容纳在喷嘴的下游端中。喷嘴头包括用于从喷嘴的喷嘴通道中接受熔料流的熔料通道。阀销引导部分设在喷嘴头的下游端,并且包括具有周缘的向外延伸凸缘,该周缘贴靠在开口的内壁上,从而使熔料通道与经过浇口的第二轴线对准。阀销可移动穿过熔料通道,以便选择性地打开浇口。其中,该喷嘴头是柔性的,以便补偿第一轴线与第二轴线之间的不对准。
Description
发明领域
本发明大体上涉及注射模制装置,更具体地涉及用于喷嘴的阀销引导器(guide)。
发明背景
在阀销往复穿过喷嘴以打开和关闭浇口的注射模制装置中,为了生产高品质的模制部件,阀销的正确对准是必需的。不正确的阀销对准常常导致在浇口处的漏泄,这可能会在模制部件的浇口区域周围造成瑕疵。另外,不正确的阀销对准可能导致对阀销和/或浇口的损坏或过早的磨损。这种损伤需要频繁地修理或更换昂贵的阀销和/或浇口部件。
用于改进阀销对准的现有技术方案通常包括定位成朝向喷嘴熔料通道下游端的引导器,其用以保持并对准阀销的自由端。因为当阀销处于打开位置时,熔料需要流过引导器,所以通常在阀销或引导器中设置有多个周向地间隔开的凹槽。另外,在喷嘴的熔料通道中提供引导器通常会导致熔料流中的低效加工变化,例如颜色变化。
阀销相对于浇口的不对准还可能是由于浇口区域的不良公差造成的。通常喷嘴头安装在密封件中,密封件则安装在喷嘴前端,喷嘴前端可联接在歧管上。在这种装置中,熔料通道出口可能由于各单个部件的公差累积效应而造成不对准。另外,部件中可能存在制造误差,这可能导致阀销和浇口之间的不对准。
因此,本发明的一个目的是提供一种改进的用于使阀销与浇口对准的阀销引导器。
发明概要
根据本发明的一个实施例,提供了一种注射模制装置,包括:
具有歧管通道的歧管,其用于接受可在压力下模制的材料的熔料流;
与所述歧管相邻的模板,其具有开口、浇口和模腔;
容纳在所述模板的所述开口中的喷嘴,所述喷嘴具有与所述歧管通道流体相通的喷嘴通道;
容纳在所述喷嘴下游端中的喷嘴头,其具有与所述喷嘴通道流体相通的熔料通道,其中,在所述喷嘴头和所述喷嘴之间存在间隙,并且所述喷嘴头可在所述喷嘴通道内自由滑动;
阀销,其可移动地穿过所述歧管通道、所述喷嘴通道和所述熔料通道,以便选择性地打开所述浇口;和
设在所述喷嘴下游端的阀销引导部分,所述阀销通过所述引导部分而与所述浇口对准。
根据本发明的一个实施例,提供了一种注射模制装置,包括:
与所述歧管相邻的模板,其具有开口、浇口和模腔;
容纳在所述模板的所述开口中的喷嘴,所述喷嘴具有与所述歧管通道流体相通的喷嘴通道;
容纳在所述喷嘴下游端中的喷嘴头,其具有与所述喷嘴通道流体相通的熔料通道;
阀销,其可移动地穿过所述歧管通道、所述喷嘴通道和所述熔料通道,以便选择性地打开所述浇口;
其中,所述喷嘴头是柔性的,以便使所述熔料通道与所述浇口对准。
根据本发明的一个实施例,提供了一种用于注射模制装置的阀销引导器,其包括:
联接在喷嘴下游端的向外延伸凸缘,所述向外延伸凸缘具有用于贴靠在模板开口的内壁上的周缘;
内表面,其限定了穿过所述阀销引导器的熔料通道,所述内表面接受用于选择性地与浇口相接合的阀销;
其中,所述阀销引导器使所述阀销和所述浇口对准。
附图简介
现在将参照附图来更全面地描述本发明的实施例,其中相似的标号表示相似的结构。
图1是根据本发明一个实施例的注射模制装置的侧剖视图;
图2是图1所示部分的放大图;
图2A是图2所示部分A的放大图;
图2B是图2所示部分B的放大图;
图3是根据本发明另一实施例的注射模制装置的一部分的侧剖视图;
图4是根据本发明又一实施例的注射模制装置的一部分的侧剖视图;
图5是沿图4中剖面线5-5的视图;
图6是本发明一个备选实施例的沿图4中剖面线5-5的视图;
图7是根据本发明又一实施例的注射模制装置的一部分的侧剖视图;
图8是沿图7中剖面线8-8的视图;
图9是根据本发明另一实施例的注射模制装置的一部分的侧剖视图;
图10是沿图9中剖面线10-10的视图;
图11是根据本发明另一实施例的注射模制装置的一部分的侧剖视图;
图12是根据本发明另一实施例的注射模制装置的一部分的侧剖视图。
图13A,13B,13C和13D是与进入浇口的阀销相对准的图2所示阀销引导器的放大侧剖视图;
图13E是图2所示阀销引导器以及模腔块开孔的放大侧剖视图。
本发明的详细描述
本发明是2003年2月21日提交的美国申请No.10/369,564的部分继续申请,该美国申请的公开内容在专利申请公布No.2003/0170340中公布,并且通过引用而完整地结合在本文中。
现在参看图1,注射模制装置总体上由标号10表示。注射模制装置10包括具有歧管通道14的歧管12,其用于接受穿过注道衬套16的模制材料熔料流。熔料从机器喷嘴(未示出)传送至注道衬套16中。歧管12分别通过第一及第二定位环30和32而在垫板28和模板26之间间隔开。
多个具有从中贯穿的喷嘴通道19的喷嘴18联接在歧管12上,其中喷嘴通道19与歧管通道14流体相通。第一轴线(未示出)通过各喷嘴通道19的中心。各喷嘴18容纳在设在模板26上的开口24中。喷嘴18从歧管通道14接受熔料流,并通过相应的浇口20将熔料流传送至多个模腔22中。浇口20延伸穿过位于开口24下游端的模板26。第二轴线35延伸通过各浇口20的中心。
阀销34延伸穿过各喷嘴18。阀销34可在伸出位置和缩回位置之间移动,在伸出位置中,阀销34的前端与浇口20相接合,在缩回位置中,阀销34与浇口20间隔开。阀销34由促动机构36驱动。促动机构36可以是气动的、液压的或任何其它合适类型的驱动机构。
喷嘴18由加热器38加热,以便在熔料朝向模腔22行进时,将熔料保持在所需的温度。模腔22由穿过模板26的冷却通道40进行冷却。热电偶42联接在各喷嘴18上,以便为其提供温度测量。
如图2中所示,具有从中贯穿的熔料通道54的喷嘴头44被容纳在喷嘴18的下游端46中,其中熔料通道54与喷嘴通道19流体相通。喷嘴头44的熔料通道54从喷嘴通道19中接受熔料流,并通过浇口20将熔料流传送至模腔22中。喷嘴头44通常是浮式的喷嘴头,其不受喷嘴18另一部分的约束,使得喷嘴头44可在所述喷嘴通道19中可滑动地移动。喷嘴头44包括上游端48、喷嘴头主体部分50和定位在浇口20附近的阀销引导部分52。
喷嘴头44的上游端48在尺寸上设置成可在喷嘴通道19内伸缩。台阶56设在上游端48和喷嘴头主体部分50之间,以便约束喷嘴头主体部分50向上游移动进入喷嘴通道19中的运动。如图2A中所示,在台阶56和喷嘴18的偏置下游面51之间提供了第一间隙49。第一间隙49允许因喷嘴头44的热膨胀而引起的运动。熔料通道54的内表面57在喷嘴头44的上游端48处渐缩,从而在喷嘴18的喷嘴通道19和熔料通道54之间提供平滑的过渡。
喷嘴头44的阀销引导部分52包括向外延伸凸缘58,其具有周缘60和下游面62。下游面62紧靠在位于模板开口24中的台肩64上。下游面62和台肩64之间的接触是喷嘴头44的唯一下游约束。因而,为适于喷嘴头44的热膨胀,喷嘴头44可以在喷嘴19内可滑动地移动。
阀销引导部分52的周缘60紧靠在位于台肩64上游的开口24的部分内壁66上。向外延伸凸缘58可以过盈配合的方式而容纳在开口24中。向外延伸凸缘58的周缘60与开口24的内壁66之间的接触可使喷嘴头44的熔料通道54与浇口20的轴线35对准。这就允许阀销34滑动而与浇口20接合或分离,同时不损坏阀销34或浇口20。
本发明的喷嘴头44具有另外的柔性优点,以便熔料通道54的下游端可横向地弯曲偏离喷嘴通道19的第一轴线,使得阀销引导部分52和浇口20的第二轴线35对准。可通过本领域技术人员显而易见的许多种方式将喷嘴头44制成为柔性的。例如,喷嘴头44可由特别柔性的材料制成,或者可通过改变喷嘴头44的厚度而制成柔性的。喷嘴头44通常由热传导材料制成,以促进从加热器38到通过喷嘴头44的熔料的热传导。或者,喷嘴头44可由耐磨材料如碳化钨、或者热绝缘材料制成,这将减少通过喷嘴头44的熔料的热损失。
本领域中的技术人员应该懂得,如果周缘60与开口24的内壁66之间的接触程度足以使熔料通道54和浇口20相对准,那么将只有一部分周缘60与开口24的内壁66相接触。
密封部件68容纳在形成于喷嘴18的下游端46处的凹腔70中。通过密封部件68的螺纹式外表面72与喷嘴18的螺纹式内表面74之间的接合,将密封部件68联接在喷嘴18上。喷嘴头44可在密封部件68中滑动,因而密封部件并不固定喷嘴头44。密封部件68包括用于贴靠在模板开口24的内壁66上的密封面78。密封面78限制熔料从位于浇口20附近的凹池80流到模板26的开口24中。在注射模制装置10的操作期间,凹池被装满熔料,其用作隔热元件。
密封部件68的下游端面76定位在喷嘴头44的阀销引导部分52的上游面61附近。如图2B中所示,在不操作或不膨胀的状态下,在密封部件68的下游端面76与阀销引导部分52的上游面61之间提供了间隙79。该间隙允许喷嘴18、密封部件68和喷嘴头44轴向热膨胀。密封部件68可包括任何合适类型的材料,并且还可由一种以上的材料制成。
喷嘴头44优选是整体式的阀销引导器,从而为熔料流提供平滑的不间断通道,这就增加了在喷嘴头44中不产生间隙的条件下可提供热膨胀的优势。然而,在一个备选实施例中,阀销引导部分52和/或向外延伸凸缘58可以是分开的工件,其联接在喷嘴上而形成本发明的喷嘴头44。
在操作过程中,熔料流在压力下流过歧管12的歧管通道14,并流入注射模制装置10的多个喷嘴18的喷嘴通道19中。阀销34缩回,以便开启浇口20,熔料流从喷嘴通道19和相应喷嘴头44的熔料通道54中流出,经过浇口20,而流入模腔22中。之后,阀销34伸出以关闭浇口20,并且通过流经冷却导管40的冷却剂来冷却模腔22。一旦预定量的时间过去之后,就会从模腔22中弹出模制部件。
喷嘴头44的阀销引导部分52用于使喷嘴头44的熔料通道54与浇口20的第二轴线35对准。如果喷嘴通道19的第一轴线和浇口20的第二轴线35不对准,那么喷嘴头44将会弯曲,以便对此进行补偿。熔料流并不会受到喷嘴头44弯曲的影响,因为喷嘴头44的上游端48仍保持与喷嘴18持续接触。
阀销引导部分52的向外延伸凸缘58与模板26的内壁66直接接触,以便使阀销34和浇口20正确对准。因为只有喷嘴头44的伸出凸缘58(即只有一件)限定了模板26和熔料通道54的通道内表面57之间的距离,所以就可避免部件公差累积的问题。另外,阀销引导部分52定位成靠近浇口20,这就允许喷嘴18和密封部件68发生热膨胀,而不影响阀销引导部分52的引导能力。另外,喷嘴头44不受任何轴向的约束,因此就可自由发生热膨胀。
参看图3,其显示了注射模制装置的另一实施例10a。相似的标号用于标示相似的部件,并且以下只详细描述图1和2所示注射模制装置之间的区别。
在这个实施例中,密封部件被更换成密封凸缘82,其设在喷嘴18a的下游端46a。密封凸缘82包括密封面78a,其与开口24a的内壁66a接触,以便密封凹池80a和开口24a之间的界面。喷嘴头44a的阀销引导部分52a具有凸缘58a,其用于使喷嘴头44a的熔料通道54a和浇口20a的轴线35a对准,以便允许以与上述相类似的方式使阀销34a和浇口20a正确对准。
参看图4,其显示了注射模制装置的另一实施例10b。这个实施例与图1和2的实施例是相似的,然而,已经减小了与模板26接触的向外延伸凸缘58b的下游面62b的表面积。如图5中所示,在阀销引导部分52b的向外延伸凸缘58b的下表面上设有凹窝84。凹窝84在形状上通常是圆形的,并与周缘60b间隔开。或者,凹窝84在形状上可以是半圆形的,并且可切去周缘60b的一部分,如图6中所示。下游面62b的变小表面积就降低了从冷模板26到喷嘴头44的传热量,因而使喷嘴头44隔热。
参看图7至图10,其分别显示了注射模制装置的其它实施例10c和10d。在如图7和8所示的实施例中,阀销34c包括设在其下游端并与阀销34c的周边间隔开的切口86。在阀销34c的外表面和熔料通道54c的内表面57c之间不需要持续接触的条件下,将阀销34c引导到浇口20中。因而,由阀销34c和喷嘴头44c运动所造成的磨损较少,并且当阀销34c伸出以关闭浇口20时,允许熔料回流经过阀销34c。
类似地,图9和10的实施例包括设在喷嘴头44d的熔料通道54d的内表面57d中的切口88。类似于图7和8的实施例,在阀销34d的外表面和熔料通道54d的内表面57d之间不需要持续接触的情形下,可将阀销34d引导到浇口20中。
参看图11,其显示了注射模制装置的另一实施例10e。在这个实施例中,阀销引导部分52e的向外延伸凸缘58e包括不同于喷嘴头44e其余部分的材料。向外延伸凸缘58e包括用于使喷嘴头44e与冷模板26之间隔热的隔热材料。隔热材料例如可包括但不限于钛、陶瓷或钢。
参看图12,其显示了注射模制装置的另一实施例10f。这个实施例与图1和2的实施例是相似的,但包括浇口嵌件90。该浇口嵌件90容纳在模板26f上的开孔92中。浇口20f穿过浇口嵌件90。这样,任何由于阀销34f穿过浇口20f所造成的对浇口嵌件90的磨损都可通过更换浇口嵌件90来校正,而无需更换整个模板26f。
参照图13A-13D,其显示了阀销34在和浇口20接触之前通过阀销引导部分52来实现的对准。台肩37a和阀销引导面37b与阀销引导部分52的上游部分和下游部分21c,21d相互配合,从而使阀销34和浇口20对准。
如果在阀销34和浇口20之间存在任何不对准,那么阀销34从如图13A所示的位置朝着浇口20横向移动,阀销台肩37a和上游部分21c相互接触,如图13B中所示。
台肩37a和上游部分21c可设有任选的锥角。该锥角可选择成在最初接触或任何后续滑动接触时,降低擦伤或损坏阀销34或阀销引导部分52的风险。
应该注意,阀销台肩37a、阀销引导面37b、以及阀销引导部分52的上游及下游部分21c和21d在直径上大于阀销头39和浇口20。通过在这些较大直径的表面37a,37b,21c和21d上产生接触和滑动,就可在需要修理或更换阀销34和阀销引导部分52之前,实现更长的使用寿命。
引导器20上的阀销台肩37a和上游部分21c两者都可通过任何合适的表面处理方法来进行硬化,以进一步降低擦伤风险。表面37a和21c的其中一个表面可选择成比另一表面更硬,使得在注射模制连续操作期间所产生的反复接触和滑动的过程中,这两个表面中的较软表面被损耗掉。被选择用于损耗的台肩37a或上游部分21c的表面例如可位于这两者中较廉价且更易更换或更换费时较少的那个部件上。
在阀销34朝向浇口20移动时,台肩37a和上游部分21c协作,使阀销34和浇口20对准。一旦台肩37a移动经过上游部分21c,那么阀销引导面37b和下游部分21d就相互接触,以保持阀销34和浇口20之间的对准(见图13C)。之后,阀销34向浇口20移动并进入浇口20中,从而关闭浇口20,如图13D所示。
阀销引导面37b和下游部分21d可以与台肩37a和上游部分21c相类似的方式进行表面处理,并且还可以包括一个被选择用于损耗的表面37b或21d。
图13A-13D中所示的造成磨损和损伤的部件部分是台肩37a、阀销引导面37b、上游部分21c和下游部分21d。这些区域定位在远离密封面37c和浇口20的位置。因而,通过结合阀销引导部分52和台肩37a以及阀销34的引导面37b,就可延长阀销34的使用寿命。另外,由于减轻或消除了由于不对准而对浇口20和阀销密封面37a造成的损伤,因此就减少或消除了模制部件上的瑕疵源。
现在参照图13E。在所示的实施例中,允许熔料积聚在阀销引导部分52周围的开口80中。熔料可用作阀销引导部分52和模板26之间的隔热材料。在一个未示出的实施例中,阀销引导部分52也可与紧邻于浇口20的模板26相接触,从而形成从阀销引导部分52到浇口20中的封闭通道,从而防止熔料漏泄到开口80中。虽然这会在阀销引导部分52和模板26之间提供隔热空隙,但是,这会在从阀销引导部分52到浇口20附近的模板26时产生一些热损失。
从本说明书中,可以清楚本发明的许多特征和优势,因而,所附权利要求旨在涵括属于本发明真实精神和范围内的所有这些特征和优势。另外,由于本领域中的技术人员将很容易想到许多变型和改型,因此,本发明并不限于所显示和所描述的确切构造和操作,因此,所有合适的改型和等效物都属于本发明的范围内。
Claims (17)
1.一种注射模制装置,包括:
具有歧管通道的歧管,其用于接受可在压力下进行模制的材料的熔料流;
喷嘴,其具有用于接受来自所述歧管通道的所述熔料流的喷嘴通道,所述喷嘴容纳在模板的开口中;
容纳在所述喷嘴下游端中的喷嘴头,所述喷嘴头具有用于接受来自所述喷嘴的所述喷嘴通道的熔料流的熔料通道;
与所述喷嘴头的所述熔料通道相通的模腔,其用于通过浇口来接受所述熔料流,所述浇口与中心轴线对准;
阀销,其可轴向移动地穿过所述熔料通道,以便选择性地打开所述浇口;
其特征在于,在所述喷嘴头的下游端提供了阀销引导部分,所述阀销引导部分具有带周缘的凸缘,所述周缘与所述模板中的所述开口的内壁相互贴靠,以便使所述熔料通道与所述浇口的所述中心轴线对准。
2.根据权利要求1所述的注射模制装置,其特征在于,所述浇口在所述开口的下游端设在所述模板中。
3.根据权利要求1所述的注射模制装置,其特征在于,所述浇口设在浇口嵌件中,所述浇口嵌件容纳在位于所述开口下游端的所述模板的开孔内。
4.根据权利要求1所述的注射模制装置,其特征在于,所述喷嘴头的上游端可在所述喷嘴通道中滑动。
5.根据权利要求1所述的注射模制装置,其特征在于,还包括联接在所述喷嘴的所述下游端上的密封部件,所述密封部件至少部分地夹在所述喷嘴和所述喷嘴头之间。
6.根据权利要求1所述的注射模制装置,其特征在于,所述凸缘是向外延伸凸缘。
7.根据权利要求1所述的注射模制装置,其特征在于,所述向外延伸凸缘的下游面与设在所述模板的所述开口中的台肩相接触。
8.根据权利要求7所述的注射模制装置,其特征在于,还包括至少一个设在所述向外延伸凸缘的所述下游面中的凹腔,所述至少一个凹腔用于减少所述向外延伸凸缘的所述下游面与所述模板中的所述开口的台肩之间的接触。
9.根据权利要求1所述的注射模制装置,其特征在于,所述向外延伸凸缘是单独的部件,并且联接在所述喷嘴头的外表面上。
10.根据权利要求9所述的注射模制装置,其特征在于,所述向外延伸凸缘包括不同于所述喷嘴头的材料。
11.根据权利要求10所述的注射模制装置,其特征在于,所述喷嘴头比所述向外延伸凸缘更具导热性。
12.根据权利要求1所述的注射模制装置,其特征在于,所述喷嘴头的所述阀销引导部分与所述浇口间隔开。
13.一种注射模制装置,包括:
具有歧管通道的歧管,其用于接受可在压力下进行模制的材料的熔料流;
喷嘴,其具有用于接受来自所述歧管通道的所述熔料流的喷嘴通道,所述喷嘴容纳在模板的开口中;
容纳在所述喷嘴下游端中的喷嘴头,所述喷嘴头具有用于接受来自所述喷嘴的所述喷嘴通道的熔料流的熔料通道;
与所述喷嘴头的所述熔料通道相通的模腔,其用于通过浇口来接受所述熔料流,所述浇口与中心轴线对准;
阀销,其可轴向移动地穿过所述熔料通道,以便选择性地打开所述浇口;
其特征在于,所述喷嘴头包括可在所述喷嘴通道内滑动的上游端以及定位在下游端的凸缘,所述凸缘具有周缘,所述周缘与所述模板中的所述开口的内壁相互贴靠,以便使所述熔料通道与所述中心轴线对准,从而允许所述阀销与所述浇口对准。
14.一种用于注射模制装置的阀销引导器,包括:
联接在喷嘴前端的向外延伸凸缘,所述向外延伸凸缘具有用于贴靠在模板中开口内壁上的周缘;
延伸穿过所述阀销引导器的熔料通道,所述熔料通道接受阀销,所述阀销用于选择性地与浇口相接合;以及
其中,所述阀销引导器使所述熔料通道与所述浇口对准。
15.一种注射喷嘴,包括:
具有喷嘴通道的喷嘴主体,所述喷嘴主体容纳在模板的开口中;
容纳在所述喷嘴前端中的喷嘴头,所述喷嘴头具有熔料通道,其用于接受来自所述喷嘴通道的熔料流,并通过浇口将所述熔料流传送至模腔中;
阀销,其可轴向移动地穿过所述熔料通道,以便选择性地打开所述浇口;
其特征在于,所述喷嘴头包括由所述喷嘴通道来引导的上游端以及由所述开口的内表面来引导的阀销引导部分。
16.根据权利要求15所述的注射喷嘴,其特征在于,还包括喷嘴密封件,其包围住至少一部分所述喷嘴头,以便为其提供隔热。
17.根据权利要求15所述的注射喷嘴,其特征在于,所述喷嘴头可响应于所述喷嘴的温度变化而相对于所述喷嘴滑动。
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-
2003
- 2003-11-04 US US10/699,867 patent/US7128566B2/en active Active
-
2004
- 2004-11-04 WO PCT/CA2004/001920 patent/WO2005042224A1/en active Application Filing
- 2004-11-04 CA CA002551047A patent/CA2551047A1/en not_active Abandoned
- 2004-11-04 EP EP04797174.2A patent/EP1680266B1/en active Active
- 2004-11-04 CN CN200480039583.3A patent/CN100542770C/zh active Active
Also Published As
Publication number | Publication date |
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EP1680266B1 (en) | 2015-01-14 |
US7128566B2 (en) | 2006-10-31 |
EP1680266A4 (en) | 2006-11-15 |
US20040146598A1 (en) | 2004-07-29 |
WO2005042224A1 (en) | 2005-05-12 |
CA2551047A1 (en) | 2005-05-12 |
EP1680266A1 (en) | 2006-07-19 |
CN100542770C (zh) | 2009-09-23 |
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