CN112238581A - 注射成形机的驱动机构 - Google Patents
注射成形机的驱动机构 Download PDFInfo
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Abstract
本发明提供一种使动作对象动作的注射成形机(10)的驱动机构(40),其具备产生驱动力的驱动用马达(42);与驱动用马达(42)连结的驱动带轮(44);与动作对象连结的从动带轮(46);以及相互并排地绕挂于驱动带轮(44)和从动带轮(46)且长度相等的多个带(48)(宽幅带(148)、窄幅带(248))。
Description
技术领域
本发明涉及使动作对象动作的注射成形机的驱动机构。
背景技术
在日本特开2019-018505号公报中公开了具有合模装置和射出装置的注射成形机。合模装置具有两个驱动机构,即、与模具的开闭动作相关的驱动机构和与成形品推出动作相关的驱动机构。射出装置也具有两个驱动机构,即、与树脂材料的供给动作相关的驱动机构和与从喷嘴向模具射出树脂材料的动作相关的驱动机构。驱动机构经由驱动带轮、带以及从动带轮将由驱动用马达产生的动力传递至动作对象。注射成形机通过使各驱动机构同步地动作来连续的制造成形品。
发明内容
在注射成形机所具有的任意的驱动机构中,若绕挂于驱动带轮和从动带轮上的带的张力降低,则产生带的浮动或者滑动,存在暂时无法从驱动带轮向从动带轮传递动力的担忧。这种情况下,由于注射成形机的任意的动作都会产生偏移,因此需要使注射成形机的动作停止。为了防止注射成形机的停止,希望防止带的浮动或者滑动。
因此,本发明的目的在于提供一种能够防止带的浮动或者滑动引起的动作的偏移的注射成形机的驱动机构。
本发明的方案是使动作对象动作的注射成形机的驱动机构,其特征在于,具有:产生驱动力的驱动用马达;与上述驱动用马达连结的驱动带轮;与上述动作对象连结的从动带轮;以及相互并排地绕挂于上述驱动带轮和上述从动带轮且长度相等的多个带。
根据本发明,难以产生带的浮动或者滑动引起的动作的偏移。因此,难以使注射成形机进行的多个动作产生偏移。
上述的目的、特征以及优点根据参照添加的附图说明的以下的实施方式的说明可容易了解。
附图说明
图1是表示从侧面观察到的注射成形机的结构的示意图。
图2是表示从侧面观察到的驱动机构的结构的示意图。
图3是表示从正面观察到的驱动机构的结构的示意图。
图4是表示窄幅带的结构的示意图。
具体实施方式
以下,以优选的实施方式为例,参照添加的附图对本发明的注射成形机的驱动机构进行详细说明。
[1.注射成形机的结构]
使用图1对注射成形机10的结构的概略进行说明。注射成形机10具有合模装置14和射出装置16。
合模装置14具有固定压板18、后压板20、多个连接杆22以及可动压板24。多个连接杆22连结固定压板18和后压板20,并且对在固定压板18与后压板20之间进行移动的可动压板24进行引导。在固定压板18安装有固定模具32,在可动压板24安装有可动模具34。由固定模具32和可动模具34构成模具30。
合模装置14具有进行模具30的开闭动作的模开闭机构40a。模开闭机构40a相当于注射成形机10的驱动机构40。模开闭机构40a具有第一马达42a、第一驱动带轮44a、第一从动带轮46a、多个第一带48a以及第一动力传递机构50。通过第一马达42a的旋转而产生的驱动力经由第一驱动带轮44a、多个第一带48a、第一从动带轮46a而传递至第一动力传递机构50。第一动力传递机构50经由滚珠丝杠机构以及连杆机构等将驱动力传递至可动压板24,使可动压板24在闭模方向或者开模方向上直线移动。
合模装置14具有进行从可动模具34推出成形品的动作的顶出机构40b。顶出机构40b相当于注射成形机10的驱动机构40。顶出机构40b具有第二马达42b、第二驱动带轮44b、第二从动带轮46b、多个第二带48b以及第二动力传递机构52。通过第二马达42b的旋转而产生的驱动力经由第二驱动带轮44b、多个第二带48b、第二从动带轮46b而传递至第二动力传递机构52。第二动力传递机构52经由滚珠丝杠机构等将驱动力传递至顶出销54,使顶出销54在推出方向或者拉入方向上直线移动。
射出装置16具有喷嘴60、缸体62、螺杆64以及漏斗66。喷嘴60设于缸体62的前端。缸体62是空心部件。螺杆64插通于缸体62的内部。缸体62以及螺杆64沿模具30的开闭方向延伸。在缸体62的上方设有漏斗66。漏斗66与缸体62的内部连通,与螺杆64的旋转动作相应地向缸体62的内部供给树脂材料。
射出装置16具有进行向缸体62的内部供给树脂材料的动作的螺杆旋转机构40c。螺杆旋转机构40c相当于注射成形机10的驱动机构40。螺杆旋转机构40c具有第三马达42c、第三驱动带轮44c、第三从动带轮46c以及多个第三带48c。通过第三马达42c的旋转而产生的驱动力经由第三驱动带轮44c、多个第三带48c、第三从动带轮46c而传递至螺杆64。其结果,螺杆64进行旋转。
射出装置16具有进行树脂材料的射出动作的射出机构40d。射出机构40d相当于注射成形机10的驱动机构40。射出机构40d具有第四马达42d、第四驱动带轮44d、第四从动带轮46d、多个第四带48d以及第四动力传递机构56。通过第四马达42d的旋转而产生的驱动力经由第四驱动带轮44d、多个第四带48d、第四从动带轮46d而传递至第四动力传递机构56。第四动力传递机构56经由滚珠丝杠机构等将驱动力传递至螺杆64,使螺杆64向喷嘴60的方向或者其相反方向直线移动。
模开闭机构40a、顶出机构40b、螺杆旋转机构40c以及射出机构40d以同一周期进行动作。
[2.驱动机构40的结构]
图1所示的模开闭机构40a、顶出机构40b、螺杆旋转机构40c以及射出机构40d作为驱动机构40发挥功能。使用图2以及图3对驱动机构40的结构进行详细说明。
驱动机构40具有产生驱动力的驱动用马达42、与驱动用马达42连结的驱动带轮44、与动作对象连结的从动带轮46、以及绕挂于驱动带轮44和从动带轮46的两个带48。
在驱动机构40是图1所示的模开闭机构40a的情况下,驱动用马达42为第一马达42a,驱动带轮44为第一驱动带轮44a,从动带轮46为第一从动带轮46a,两个带48为多个第一带48a,动作对象是可动压板24。
在驱动机构40是图1所示的顶出机构40b的情况下,驱动用马达42为第二马达42b,驱动带轮44为第二驱动带轮44b,从动带轮46为第二从动带轮46b,两个带48为多个第二带48b,动作对象是顶出销54。
在驱动机构40为图1所示的螺杆旋转机构40c的情况下,驱动用马达42为第三马达42c,驱动带轮44为第三驱动带轮44c,从动带轮46为第三从动带轮46c,两个带48为多个第三带48c,动作对象是螺杆64。
在驱动机构40是图1所示的射出机构40d的情况下,驱动用马达42为第四马达42d,驱动带轮44为第四驱动带轮44d,从动带轮46为第四从动带轮46d,两个带48为多个第四带48d,动作对象是螺杆64。
如图2所示,在本实施方式中,两个带48的一方是宽度W相对较宽的宽幅带148,另一方是宽度W相对较窄的窄幅带248。宽幅带148与窄幅带248彼此长度相等、而且相互并排配置。在本说明书中,所谓“相对”意味着相互并排的多个带48的比较关系。
在图2所示的驱动机构40中,驱动带轮44安装于驱动用马达42的旋转轴70。旋转轴70的一端支撑在驱动用马达42的内部,另一端是自由的。也就是,安装于旋转轴70的驱动带轮44的支撑构造是悬臂构造。在悬臂构造的驱动带轮44中,越接近支撑位置(本实施方式的情况下为驱动用马达42)则产生于带48的张力越高,越远离支撑位置则产生于带48的张力越低。因此,越远离支撑位置则越容易在带48产生浮动或者滑动。另外,宽幅带148的强度高,窄幅带248的强度低。在本实施方式中,为了使窄幅带248比宽幅带148先损伤,宽幅带148配置在相对接近驱动用马达42的位置,窄幅带248配置在相对远离驱动用马达42的位置。
如图3所示,驱动带轮44是具有沿周向以一定间隔排列的驱动带轮齿82的带齿带轮。从动带轮46是具有沿周向以一定间隔排列的从动带轮齿84的带齿带轮。窄幅带248是具有沿长度方向以一定间隔排列的带齿80的啮合传动带。虽然图3中未示出,但宽幅带148也是啮合传动带。如图4所示,窄幅带248的宽度W为带齿80的间距P以上。并且,窄幅带248的宽度W比(所有的带48的宽度W的合计值/带48的数量)小。
窄幅带248的强度相对较差。因此,如图3所示,在窄幅带248的附近设有非接触式的位移传感器86。例如,在位移传感器86使用激光的情况下,激光向位于驱动带轮44与从动带轮46之间的位置的窄幅带248照射。位移传感器86检测窄幅带248是否存在于驱动带轮44与从动带轮46之间。位移传感器86的检测结果输出至监视装置88。监视装置88具有处理器等运算装置和监视器、扬声器等使用者接口。在窄幅带248被切断而从驱动带轮44和从动带轮46脱落的情况下,监视装置88基于位移传感器86的检测结果检测窄幅带248不存在,并向使用者报告。
[3.变形例]
在上述的实施方式中,对在驱动带轮44和从动带轮46绕挂两个带48的驱动机构40进行了说明,但带48的数量并不限于两个。也可以在驱动带轮44和从动带轮46绕挂三个以上的带48。另外,在三个以上的带48分别具有不同的宽度W的情况下,优选以随着远离驱动用马达42而带48的宽度W变窄的方式配置各带48。
在上述的实施方式中,对具有宽度W彼此不同的带48的驱动机构40进行了说明,但多个带48的宽度W也可以彼此相等。
在上述的实施方式中,对具有一个驱动带轮44和一个从动带轮46的驱动机构40进行了说明,但从动带轮46也可以是多个。该情况下,在一个驱动带轮44和各个从动带轮46上单独地绕挂多个带48。
多个带48也可以不是啮合传动带而是摩擦传动带。
上述的实施方式的驱动机构40是旋转轴70的一端支撑在驱动用马达42的内部、另一端为自由的悬臂构造。驱动机构40也可以是旋转轴70的一端支撑在驱动用马达42的内部、另一端由轴承等支撑的双支撑构造,来代替上述构造。
[4.从实施方式得到的发明]
以下记载从上述实施方式以及变形例把握的发明。
本发明的方案是使动作对象动作的注射成形机10的驱动机构40,具有:产生驱动力的驱动用马达42;与驱动用马达42连结的驱动带轮44;与动作对象连结的从动带轮46;以及相互并排地绕挂于驱动带轮44和从动带轮46且长度相等的多个带48(宽幅带148、窄幅带248)。
根据上述结构,即使在一个带48上产生浮动或者滑动,剩余的带48也从驱动带轮44向从动带轮46传递动力,因此难以产生带48的浮动或者滑动引起的动作偏移。因此,难以使注射成形机10进行的多个动作产生偏移。
在本发明的方案中,优选至少一个带48(窄幅带248)与其它带48(宽幅带148)相比较,宽度不同。
在本发明的方案中,优选宽度最窄的带48(窄幅带248)设置在离驱动用马达42最远的位置。
根据上述结构,窄幅带248设置在张力最低的位置,即、离驱动用马达42最远的位置,因此容易产生窄幅带248的浮动或者滑动。另外,窄幅带248与其它带48(宽幅带148等)相比较,强度较差。因此,与配置在驱动用马达42附近的其它带48相比较,窄幅带248容易损伤。这样,通过将强度低的窄幅带248配置在容易产生带48的损伤的位置、将强度高的其它带48配置在难以产生带48的损伤的位置,从而能够防止多个带48同时损伤。另外,根据上述结构,通过监视比其它带48先损伤的可能性高的窄幅带248,能够在所有的带48损伤之前,报告产生带48的损伤的情况。其结果,能够防止模具30、注射成形机10的其它部件损伤。
在本发明的方案中,优选还具有传感器(位移传感器86),该传感器检测宽度最窄的带48(窄幅带248)是否存在于驱动带轮44与从动带轮46之间。
根据上述结构,能够向使用者报告窄幅带248脱落的情况。
在本发明的方案中,优选驱动带轮44和从动带轮46是带齿带轮,多个带48是啮合传动带。
在带48是啮合传动带的情况下,存在使用摩擦传动带的注射成形机10不会产生的以下的问题。例如,若带48产生浮动,则存在带齿80越过驱动带轮齿82或者从动带轮齿84的情况。这种情况下,不仅带48而且有注射成形机10的其它部件破损的担忧。根据上述结构,即使带齿80越过驱动带轮齿82或者从动带轮齿84,剩余的带48也与驱动带轮44以及从动带轮46正确地啮合。因此,能够抑制为仅带齿80越过驱动带轮齿82或者从动带轮齿84造成的带48的破损,能够防止其它部件破损。
在本发明的方案中,优选宽度最窄的带48(窄幅带248)的宽度W为设于带48(窄幅带248)的齿(带齿80)的间距P以上。
此外,本发明的注射成形机的驱动机构并不限于上述的实施方式以及变形例,在不脱离本发明的主旨的范围内,当然能够采用各种结构。
Claims (6)
1.一种注射成形机的驱动机构,是使动作对象动作的注射成形机的驱动机构,其特征在于,具有:
产生驱动力的驱动用马达;
与上述驱动用马达连结的驱动带轮;
与上述动作对象连结的从动带轮;以及
相互并排地绕挂于上述驱动带轮和上述从动带轮且长度相等的多个带。
2.根据权利要求1所述的注射成形机的驱动机构,其特征在于,
至少一个上述带与其它上述带相比较,宽度不同。
3.根据权利要求2所述的注射成形机的驱动机构,其特征在于,
宽度最窄的上述带设置在离上述驱动用马达最远的位置。
4.根据权利要求2或3所述的注射成形机的驱动机构,其特征在于,
还具有传感器,该传感器检测宽度最窄的上述带是否存在于上述驱动带轮与上述从动带轮之间。
5.根据权利要求1~4中任一项所述的注射成形机的驱动机构,其特征在于,
上述驱动带轮和上述从动带轮是带齿带轮,
多个上述带是啮合传动带。
6.根据权利要求5所述的注射成形机的驱动机构,其特征在于,
宽度最窄的上述带的宽度为设于上述带的齿的间距以上。
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