CN105592989B - 金属箔的切断装置 - Google Patents
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
在利用下刃(4)和垫片(7)对投入到下刃(4)上的金属箔母材(W)进行加压制约的基础上,通过由下刃(4)侧的切削刃(4a)和上刃(6)侧的切削刃(6a)的啮合产生的剪切作用而进行切断。在下刃(4)的上面及垫片(7)的加压面上固定有摩擦系数比其大的树脂制的面板(10、11)。通过这些面板(10、11)产生的摩擦力来抑制切断前的金属箔母材(W)被上刃(6)的推压力拖动而动作的情况。由此,不产生“毛刺”、“卷起”等,确保切断品质。
Description
技术领域
本发明涉及以铝箔或铜箔等为代表的金属箔的切断装置。
背景技术
作为这种金属箔的切断装置,例如提出有专利文献l记载的方案。在该专利文献1记载的切断装置中,为了利用由第一刃和第二刃的啮合产生的剪切作用将铝、钽、铌、钛、锆等电容器用金属箔切断,将双方的刃彼此的啮合深度(搭接余量)和间隙限定在特定的数值范围。
但是,在专利文献1记载的切断装置中,由于基本上利用第一刃和第二刃的啮合产生的剪切作用进行切断,故而不能够避免发生将金属箔向双方的刃彼此的啮合部侧拖动的现象。该倾向在成为切断对象的金属箔的厚度尺寸越大时越显著,金属箔的厚度尺寸越大,对应于此,双方的刃彼此的啮合深度及间隙也必然不得不变大,其结果,由于金属箔的动作,会导致切断品质的恶化及切断面的“卷起”及“毛刺”的发生。
专利文献1:(日本)特开2007-152436号公报
发明内容
本发明是鉴于上述课题而设立的,其目的在于提供一种切断装置,基本上利用双方的刃彼此的啮合产生的剪切作用进行切断,并且能够抑制在切断时金属箔被拖动而动作的情况。
本发明在利用基于下刃和上刃的啮合产生的剪切作用将在下刃上载置的金属箔切断时,在下刃上,以存在于下刃与在下刃上载置的金属箔之间的方式设有摩擦系数比下刃大的保持单元。
根据本发明,由于夹有摩擦系数比下刃大的保持单元,故而能够抑制在切断时金属箔被拖动而动作,切断精度及切断品质良好,并且能够抑制在切断面的“卷起”及“毛刺”的发生。
附图说明
图1是表示本发明的切断装置的第一实施方式的图,是上模上升时的剖面说明图;
图2是表示上模从图1的状态下降,垫片与金属箔母材接触的状态的剖面说明图;
图3是表示上模从图2的状态进一步下降,将金属箔母材切断后的状态的剖面说明图;
图4(A)是图1~3所示的切断装置的主要部分放大图,(B)是图4(A)中的a部的进一步的主要部分放大图;
图5是图4(A)中的下刃的平面说明图;
图6是表示图4(A)、(B)所示的切断装置的下刃侧的面板的厚度和剪切面率(%)的关系的图;
图7是表示本发明的切断装置的第二实施方式的图,是与图4(B)同等部位的主要部分放大图。
具体实施方式
图1~6是表示用于实施本发明的金属箔的切断装置的更具体的第一方式,特别是,图1~3表示冲压型的切断装置的基本构造及该构造下的动作,图4(A)、(B)、图5表示上述切断装置的主要部分的详细。
如图1所示,切断装置由下模1、相对于该下模1可升降地相对配置的上模2构成。
下模1在下支架3上固定有例如由钢或超硬金属等构成的下刃4,该下刃4前侧的纵壁面和上面构成的角部为下刃4侧的切削刃4a。而且,在该下刃4上,供给并载置成为切断对象的长条的金属箔母材、例如将多片重合的长条的金属箔母材W。
另一方面,上模2将上支架5作为母体,在其上组装有例如由钢或超硬金属等构成的上刃6和例如钢制的作为推压部件的垫片7,垫片7固定在垫片支架8上,上刃6的下端部中接近垫片7的角部为切削刃6a。另外,上刃6相对于上支架5可上下动作地被支承,并且垫片支架8经由聚氨酯或压缩螺旋弹簧等弹性体9可上下动作地弹性支承在上支架5上。而且,如图1所示,在垫片7处于最上升位置的状态下,垫片7的下端部位于上刃6的下方侧。
在这样构成的切断装置中,将多张重合的长条的金属箔母材W从图1的左方向一点点送入规定量的话,若被定量供给的金属箔母材W在下刃4上停止并定位,则以上支架5为母体的上模2整体相对于下模1下降。伴随着该上模2的下降动作,如图2所示地,垫片7最初与下刃4上的金属箔母材W抵接,垫片7一边将弹性体9压缩一边以其弹性力将金属箔母材W相对于下刃4推压。由此,金属箔母材W中应为切断线的部位(如后所述,下刃4侧的切削刃4a和上刃6侧的切削刃6a啮合的部位)的最近位置被下刃4和垫片7加压制约。
若上模2下降,则垫片7被压靠在金属箔母材W上,故而之后,仅上支架5和上刃6下降,如图3所示地下刃4侧的切削刃4a和上刃6侧的切削刃6a相互啮合。而且,通过由该下刃4侧的切削刃4a和上刃6侧的切削刃6a的啮合产生的剪切作用,从金属箔母材W以规定尺寸将金属箔片P切断。
在切断后若上模2上升动作,则最初,上刃6上升,接着,垫片7上升而从金属箔母材W离开,包含上刃6及垫片7的上模2整体恢复到图1的初始状态,结束一循环,之后,反复进行与上述同样的动作。
图4(A)、(B)详细地表示图1~3所示的切断装置的主要部分,在下刃4及垫片7中与金属箔母材W直接接触的部分、即下刃4的上面及垫片7的下面即加压面,为了尽可能地抑制由于切断时的推动而使金属箔母材W动作,例如通过丙烯类粘接剂等作为保持单元将规定厚度的面板10或11分别粘接固定。
由此,如图4(A)所示地由下刃4和垫片7对金属箔母材W加压制约时,在下刃4的上面与金属箔母材W之间、及垫片7的加压面与金属箔母材W之间分别存在面板10或11。由此可理解,在图1~3中,省略了下刃4侧及垫片7侧各自的面板10、11的图示,在该图中仅表示了切断装置的基本构造及其基本动作。
这些面板10、11以摩擦系数比下刃4及垫片7的材质即金属大为条件,刃4a及上刃6侧的切削刃6a更深的位置,由此,在被下刃4和面板10及金属箔母材W围成的区域确保间隙G,故而在切断时,若面板10、11不与切削刃4a、6a干涉的话,则也不咬入这些切削刃4a、6a彼此的啮合部。
图6表示使图4(A)、(B)所示的下刃4侧的面板10的厚度β多级地变化时的切断品质的指标即剪切面比(%)的变化。在此,剪切面比(%)是指,在反复进行金属箔片P的多次切断而观察各自的剪切口面的情况下,在剪切口面不产生“卷起”及“毛刺”,成为平滑的剪切剖面(抛光面)的切断枚数除以全部切断枚数的比率。另外,图6的面板10的厚度β为0μm的情况是指,未使用下刃4侧的面板10的意思。由图6可知,除了下刃4侧的面板10的厚度为0μm之外,在为150μm及200μm的情况下,剪切面比降低,在将剪切率的目标值设为90%以上的情况下,能够实现其目标值的是,下刃4侧的面板10的厚度β为50μm的情况和100μm的情况。
对该方面进行考察,若面板10的厚度β变大,则如图4(B)所示,从面板10侧朝向切削刃4a侧垂下且跨过这些面板10和切削刃4a的金属箔母材W接近垂直,进而接近与双方的切削刃4a、6a彼此的啮合面平行的方向。因此,推测为作为切断品质的指标的剪切面比(%)降低。
换言之,如图4(B)所示,下刃4的上面和跨过面板10和切削刃4a的金属箔母材W构成的角度θ过大的话,则作为切断品质的指标的剪切面比(%)降低。
即,之前基于图5进行说明,为了避免面板10向下刃4的切削刃4a侧的卷入及面板10和切削刃4a的干涉,在从下刃4侧的切削刃4a的位置起作为规定量α而深入0.5mm左右的位置固定有面板10,故而若下刃4的上面和跨过面板10和切削刃4a的金属箔母材W构成的角度θ超过12度,则作为切断品质的指标的剪切面比(%)小于90%。
这样,在以在从下刃4侧的切削刃4a的位置起作为规定量α而深入0.5mm左右的位置固定有面板10为前提的情况下,在下刃4侧的面板10的厚度θ为50~100μm的范围内,若角度θ为12度以下,则作为切断品质的指标的剪切面比(%),能够确保90%以上。这些条件推测为对垫片7侧的面板11也能够同样地适用。
图7表示本发明的切断装置的第二实施方式,对与图4(B)共通的部分标注同一标记。在该第二实施方式中,作为下刃4侧的保持单元的面板20形成为具有朝向其下刃4侧的切削刃4a为下梯度的倾斜面20a的形状。
在该第二实施方式中,除了与之前的第一实施方式同样的效果之外,即使下刃4的上面和跨过面板20和切削刃4a的金属箔母材W构成的角度θ相对变大,也能够实现所希望的目的。
在此,在上述各实施方式中,以将多张重合的金属箔母材W在其层积状态下切断的情况为例进行了说明,但只要能够确保切断品质,则不限定其层积张数,另外,也可以为将一张金属箔母材W切断的方式。
另外,上述各实施方式中的作为保持单元的各自的面板10、11的主要功能为,在与金属箔母材W之间能够产生较大的摩擦力,若满足该条件,各自的面板10、11不必限定聚丙烯及聚乙烯等树脂制的材料。例如,各自的面板10、11也可以为橡胶等弹性体制。该情况下,通过利用推压力使弹性体制的面板10、11积极地弹性变形,能够产生更大的摩擦力。
另外,作为各自的面板10、11,在采用了铁系或非铁系的金属制的材料的基础上,作为可得到必要的摩擦力的粗糙面形状,可将表面形成为褶皱状或者凹凸形状。通过该粗糙面形状,能够在与金属箔母材W之间产生必要的摩擦力。
Claims (9)
1.一种金属箔的切断装置,其具有下刃和可与该下刃啮合的上刃,通过由所述下刃和上刃的啮合产生的剪切作用将在所述下刃上载置的金属箔切断,其中,
在所述下刃上,以存在于下刃与在该下刃上载置的金属箔之间的方式设置有摩擦系数比所述下刃大的保持单元。
2.如权利要求1所述的金属箔的切断装置,其中,
在比所述下刃侧的切削刃往里规定量的位置设有规定厚度的保持单元,
在所述下刃侧的切削刃的最近位置,在该下刃与金属箔之间确保有间隙。
3.如权利要求1或2所述的金属箔的切断装置,其中,
将切断前的金属箔相对于所述下刃推压的推压部件接近所述上刃设置,
在该推压部件上,以存在于该推压部件与由该推压部件推压的金属箔之间的方式设有摩擦系数比所述推压部件大的保持单元。
4.如权利要求3所述的金属箔的切断装置,其中,
所述下刃侧的保持单元和推压部件侧的保持单元设置在上下方向上相互正对的位置。
5.如权利要求1或2所述的金属箔的切断装置,其中,
所述下刃侧的保持单元具有朝向该下刃侧的切削刃为下梯度的倾斜面。
6.如权利要求1或2所述的金属箔的切断装置,其中,
跨过所述下刃侧的保持单元和下刃侧的切削刃的切断前的金属箔相对于所述下刃的上面所成的角度为12度以内。
7.如权利要求1或2所述的金属箔的切断装置,其中,
所述保持单元为树脂制。
8.如权利要求1或2所述的金属箔的切断装置,其中,
所述保持单元为弹性体制。
9.如权利要求1或2所述的金属箔的切断装置,其中,
所述保持单元为金属制,该保持单元中与金属箔接触的部分为粗糙面。
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JP2007237324A (ja) | 2006-03-08 | 2007-09-20 | Fujifilm Corp | ウェブ切断装置及びウェブ切断方法 |
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