CN109891124B - 导电带 - Google Patents
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Abstract
一种导电的防静电传动带包括其中具有多个齿结构的第一或传动表面,其中在每个相邻对的齿之间形成有平台部分。传动表面由具有导电特性的织物层提供。织物层具有与传动表面相对的内表面。第二表面设置成与传动表面相对。第二表面由聚合物主体提供,该聚合物主体与织物层的内表面一致并与之配合。至少一个拉伸增强构件至少部分地包裹在聚合物主体中,并且在整个由带形成的环中在每个平台部分处沿着织物层的内表面延伸。导电股线至少部分地包裹在聚合物主体中并且在每个平台部分处沿着织物层的内表面延伸。
Description
相关申请的交叉引用
本申请要求2017年7月19日提交的美国临时专利申请号62/534,286的优先权,该文献的全部内容通过引用并入本文中。
背景技术
本发明涉及动力传送带,例如通常用于同步传动(例如,用于各种工业和汽车动力传送和/或同步应用)的齿形带。在沿着滑轮或链轮运行这种带期间,静电如果没有以其他方式被缓解,则会积聚并释放。可以通过在带中建立导电性来进行缓解,该带通常主要是聚合的并且在结构上是非导电的。然而,在否则不导电的带中建立导电性对于制造具有持久的足够导电性的带具有显着的挑战。
发明内容
在一个方面,本发明提供了一种导电的防静电传动带。所述带包括第一表面,该第一表面设置为在其中具有多个齿结构的传动表面,其中平台部分形成在多个齿结构中的每个相邻对之间。传动表面由具有导电特性的织物层提供。织物层具有与传动表面相对的内表面。带的第二表面设置为与传动表面相对,并且第二表面由聚合物主体提供,该聚合物主体与织物层的内表面一致并与之配合。至少一个拉伸增强构件至少部分地包裹在聚合物主体中,以在整个由带形成的环中在每个平台部分处沿着织物层的内表面延伸。导电股线至少部分地包裹在聚合物主体中,以在每个平台部分处沿着织物层的内表面延伸。
在另一方面,本发明提供一种制造导电的防静电传动带的方法。将导电织物层安装到鼓上,使得织物层表面与鼓相对地暴露。拉伸增强构件和额外的导电股线都螺旋地缠绕在织物层表面上。聚合物主体化合物以未固化状态施加在螺旋缠绕的拉伸增强构件和额外的导电股线上。将聚合物主体化合物和导电织物层形成到鼓上,并使聚合物主体化合物固化。将带从鼓上移除。
通过考虑详细描述和附图,本发明的其他方面将变得显而易见。
附图说明
图1是根据本发明的一个实施例的导电正时带的部分横截面。
图2是示出在鼓上形成图1的导电正时带的构造方法的透视图。
具体实施方式
在详细解释本发明的任何实施例之前,应当理解的是,本发明在其应用方面不限于以下描述中阐述的或以下附图中示出的部件的构造和布置的细节。本发明能够具有其他实施例并且能够以各种方式被实践或执行。
虽然制造在使用期间抵抗静电积聚的导电带是已知的,但是典型的橡胶化合物特性通常受添加到带化合物中的碳黑类型的很大影响。因此,添加足够的导电类型的碳黑以使给定的化合物导电可能是不实际的。在这种情况下,必须使齿织物面层导电。然而,当带与链轮啮合并磨损时,面层织物的导电性可能随着使用而显着减小。此外,如果带没有首先发生故障,则可以想到织物可能完全从带表面磨掉。由于只有织物是导电的并且被磨掉(或导电性降低),因此静电可能会积聚并产生火花。
图1示出根据本发明的一个实施例的同步或齿形带20。当带20运行经过滑轮或带齿链轮(未示出)时,带20提供导电性以在使用期间抑制静电积聚。带20形成为无端环,并且仅以截面示出了一部分,应理解带20的构造在整个环中是相同的。带20包括具有多个齿结构28或简称为齿28的第一或传动表面24。平台部分32位于每个相邻的齿对之间。传动表面24由具有导电特性的织物层36或织物面层提供。例如,织物层36可以由线或纱线编织或制造,该线或纱线中的至少一些是导电的。织物层36还可以涂覆有导电聚合物(热固性或热塑性),其通过各种方式导电,诸如碳黑、碳纳米管或金属粉末等。织物层36具有与传动表面24相对的内表面40。在一些构造中,带20可包括织物面层,该织物面层包括两层或更多层导电织物,并且内表面40是多层织物面层的内表面。带20的第二表面44设置成与传动表面24相对。第二表面44可由聚合物主体48提供,该聚合物主体48与织物层36的内表面40一致并与其牢固地固定。带20的拉伸部分由至少部分地包裹在聚合物主体48中的一个或多个拉伸增强构件52形成。拉伸增强构件52包括围绕由带20形成的整个环的多个连续的绕组或匝。每个拉伸增强构件52由相对不可伸展材料的帘线形成,并且在整个由带20形成的环中在每个平台部分32处沿着织物层36的内表面40延伸。例如,一个或多个拉伸增强构件52的材料可以具有大于聚合物主体48的材料的弹性模量。在一些构造中,一个或多个拉伸增强构件52的材料具有大于50GPa或甚至大于75GPa的弹性模量,而聚合物主体48的材料具有小于10GPa或者甚至小于1 GPa的弹性模量。拉伸增强构件52的材料的非限制性示例包括玻璃纤维、碳纤维、对位芳纶或PBO(聚(对亚苯基-2,6-苯并二恶唑))。如下面进一步描述的,拉伸增强构件52可以是导电的或不导电的。
如图2所示的,带20可以在某些方面以类似于美国专利4,626,232的方法或过程中构造,其全部内容通过引用并入本文。例如,形成为管的织物层36可以滑到带凹口或带凹槽的鼓41上,并且在将聚合物主体48施加到织物层36上之前,可以通过采用沉积轮(laydownwheel)在织物层36周围以多匝或绕组缠绕拉伸增强构件52来施加拉伸部分。此后,可以在非固化状态下施加形成聚合物主体48的材料环,以覆盖织物层36和拉伸增强构件52的绕组。然后施加热和/或压力以使得聚合物主体48使织物层36与鼓41一致以形成齿28。可以包含嵌入其中的增强纤维的聚合物主体48在形成期间渗出通过拉伸增强构件52。
除了拉伸增强构件52之外,沿着织物层36的内表面40在带20中提供一个或多个额外的导电股线60,如图1和2所示。一个或多个导电股线60与拉伸增强构件52不同,并且可以与其间隔开或与其接触。另外,一个或多个导电股线60的材料可具有可以小于构成拉伸增强构件52的材料的弹性模量的弹性模量。与拉伸增强构件52类似,一个或多个导电股线60可包括围绕由带20形成的整个环的多个连续绕组或匝。实际上,制造带20的方法可以包括在单个组合步骤中将一个或多个导电股线60的绕组或匝与拉伸增强构件52一起施加到织物层36上(例如,采用沉积轮同时施加拉伸增强构件52的成对绕组和导电股线60)。在其他构造中,导电股线60可在施加拉伸增强构件52之前或之后施加。拉伸增强构件52和一个或多个导电股线60两者都围绕织物层36的内表面40螺旋地延伸。一个或多个导电股线60直接在织物层36的内部形成额外层或备用导电层。尽管每个导电股线60可以是被纺成包括多根细丝或纤维的股线,但是由一个或多个导电股线60形成的备用导电层是非织造层(即,不编织或制造成织物或布)。带20可以由如上所述制造并在美国专利4,626,232中详述的带套构成,其中带套在成形后被切成多个类似的带20。切成带20的带套具有两个相对的边缘,并且每个拉伸增强构件52由两个相对边缘之间的多个绕组或匝形成,使得在每个带20中包含至少一个完整的绕组,并且在大多数构造中包含多个绕组。同样地,一个或多个导电股线60由两个相对边缘之间的多个绕组或匝形成,使得在每个带20中包含至少一个完整的绕组,并且在大多数构造中包含多个绕组。所图示的示例示出了每个带20中的8至9个绕组,但是在其他实施例中,该数量可以小于8或大于9。
拉伸增强构件52可以是在整个带20上(并且在从其切成带20的整个带套中)螺旋地延伸的单个连续股线。然而,如果拉伸增强构件52是具有最终扭转方向的扭转构造(即,所谓的“S形扭转”或“Z形扭转”中的任一个)并且在使用带20期间需要中性带跟踪,则带20可包括以交替图案布置的两个相反扭转的股线以形成拉伸部分。同样地,带20可以包括从带20的边缘到边缘螺旋地延伸的单个连续的导电股线60,或者具有相反扭转方向的多个导电股线60(例如,细纱)在整个带20中交替。
在一些构造中,每个导电股线60包括其上施加有导电涂层的非导电纺织品的纱线或线股。例如,导电股线60可以由诸如尼龙线的尼龙形成。导电涂层可以是溶剂化或含水橡胶浸渍物,其中碳黑、碳纳米管或金属粉末等施加到非导电纺织品上。替代性地或另外,带20可包括一个或多个金属线(例如,钢、黄铜、铜)的导电股线60。当使用一个或多个非金属导电股线60时,尺寸可以用旦尼尔(denier)表示,并且一个或多个导电股线60可以是10旦尼尔或更大。如图所示,导电股线60的直径可以小于拉伸增强构件52的直径,并且可以是拉伸增强构件52的直径的25%或更小。这样,第二表面44与导电股线60之间的间隔距离大于第二表面44与拉伸增强构件52之间的间隔距离。在其他构造中,导电股线60和拉伸增强构件52可以具有相同的直径。尽管示出了圆形横截面,但是其他横截面是可选的,诸如其他圆角形状,甚至是正方形或矩形,并且当(多个)横截面是非圆形时,也可以适用上面表达的尺寸关系。例如,上面使用的“直径”可以用“宽度”、“高度”或“最大横截面尺寸”代替。
通过在面层织物层36后方构造带有(多个)导电股线60的备用导电层的带20,带20的防静电特性或导电性不易受织物层36的磨损影响而退化,使得防静电特性更持久。然而,对此优点的进一步说明,与织物层36相比,新的带20可以提供大大降低的电阻,因为(多个)导电股线60与织物层36形成平行的导电路径。(多个)导电股线60的电阻可以约等于织物层36的电阻(例如,其+/- 10%),或者远小于织物层36的电阻(例如,小于其10%、或甚至小于其1%)或甚至大于织物层36的电阻。在一些情况下,(多个)导电股线60的电阻远高于织物层36的电阻(例如,织物层电阻可小于(多个)导电股线60的电阻的10%,或甚至小于1%)。即使当(多个)导电股线60的电阻比织物层36相对更高时,带20作为整体的合成电阻由于并联电阻器的原理而小于如果提供相同的织物层36而没有(多个)导电股线60的情况。尽管用于形成聚合物主体48的橡胶化合物也可以例如通过导电碳黑添加剂导电,但是(多个)导电股线60的备用导电层的实施可以使其不必要,这尤其是因为可添加到橡胶混合物中的碳黑的量实际上受到不利的粘度增加效果的限制。
本文使用的术语“导电”可以指对应于根据ISO 9563:2015和其中测量程序的不超过 6x105 L/w的欧姆电阻的电导率,或者替代地是指根据橡胶制造商协会的动力传送带技术公告(IP-3-3)及其中测量程序的不超过6兆欧的电阻。
Claims (17)
1.一种导电的防静电无端传动带(20),其包括:
第一表面,所述第一表面设置为在其中具有多个齿结构(28)的传动表面(24),其中平台部分(32)形成在所述多个齿结构中的每个相邻对之间,其中所述传动表面(24)由具有导电特性的织物层(36)提供,并且其中所述织物层具有与所述传动表面(24)相对的内表面(40);
设置为与所述传动表面(24)相对的第二表面(44),所述第二表面由聚合物主体(48)提供,所述聚合物主体与所述织物层(36)的所述内表面(40)一致并与之配合;以及
至少一个拉伸增强构件(52),其部分地包裹在所述聚合物主体(48)中并且在整个由所述传动带(20)形成的无端环中在每个平台部分(32)处沿着所述织物层(36)的所述内表面(40)延伸;
特征在于,额外设置有导电股线(60),其部分地包裹在所述聚合物主体(48)中,所述导电股线(60)与所述至少一个拉伸增强构件(52)不同并且在每个平台部分(32)处沿着所述织物层(36)的所述内表面(40)延伸。
2.根据权利要求1所述的导电的防静电无端传动带,其中,所述至少一个拉伸增强构件(52)包括玻璃纤维、碳纤维、对位芳纶或PBO的帘线。
3.根据权利要求1所述的导电的防静电无端传动带,其中,所述导电股线(60)包括非导电纺织品的纱线或线股,所述非导电纺织品具有施加在其上的导电涂层。
4.根据权利要求3所述的导电的防静电无端传动带,其中,所述导电涂层是具有碳黑或碳纳米管或金属粉末的溶剂化橡胶浸渍物。
5.根据权利要求1所述的导电的防静电无端传动带,其中,所述导电股线(60)包括一个或多个导电股线(60),并且每个所述导电股线(60)在整个所述传动带(20)上螺旋地延伸。
6.根据权利要求1所述的导电的防静电无端传动带,其中,所述导电股线(60)包括金属线。
7.根据权利要求1所述的导电的防静电无端传动带,其中,所述导电股线(60)和所述至少一个拉伸增强构件(52)围绕所述织物层(36)的所述内表面(40)螺旋地延伸。
8.根据权利要求1所述的导电的防静电无端传动带,其中,所述聚合物主体(48)由非导电的橡胶化合物形成。
9.根据权利要求1所述的导电的防静电无端传动带,其中,所述聚合物主体(48)由导电的橡胶化合物形成。
10.根据权利要求1所述的导电的防静电无端传动带,其中,所述织物层(36)包括两层或更多层的导电织物。
11.根据权利要求1所述的导电的防静电无端传动带,其中,所述导电股线的电阻小于所述织物层(36)的电阻的10%。
12.根据权利要求1所述的导电的防静电无端传动带,其中,所述导电股线的电阻小于所述织物层(36)的电阻的1%。
13.根据权利要求1所述的导电的防静电无端传动带,其中,所述导电股线(60)的电阻高于所述织物层(36)的电阻。
14.一种制造导电的防静电无端传动带(20)的方法,所述方法包括:
将导电的织物层(36)安装到鼓(41)上,使得织物层表面(40)与所述鼓(41)相对地暴露;
将拉伸增强构件(52)和额外的导电股线(60)螺旋地缠绕在所述织物层表面(40)上,所述导电股线(60)与所述拉伸增强构件(52)不同;
将处于未固化状态的聚合物主体化合物(48)施加在螺旋缠绕的拉伸增强构件(52)和额外的导电股线(60)上;
将所述聚合物主体化合物(48)和所述导电的织物层(36)形成到所述鼓(41)上并使所述聚合物主体化合物(48)固化;和
将所述传动带(20)从所述鼓(41)上移除。
15.根据权利要求14所述的方法,其中,所述拉伸增强构件(52)和所述额外的导电股线(60)在一次操作中通过共用的安装工具一起同时地缠绕在所述织物层表面(40)上。
16.根据权利要求14所述的方法,其中,在将所述额外的导电股线(60)缠绕到所述织物层表面(40)上之前,将所述拉伸增强构件(52)缠绕在所述织物层表面(40)上。
17.根据权利要求14所述的方法,其中,在将所述额外的导电股线(60)缠绕到所述织物层表面(40)上之后,将所述拉伸增强构件(52)缠绕在所述织物层表面(40)上。
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DE102014008622A1 (de) * | 2014-06-17 | 2015-12-17 | Arntz Beteiligungs Gmbh & Co. Kg | Kraftübertragungsriemen mit einer Polyethylen-Beschichtung |
-
2018
- 2018-05-30 US US16/335,528 patent/US11287013B2/en active Active
- 2018-05-30 CN CN201880004137.0A patent/CN109891124B/zh active Active
- 2018-05-30 EP EP18732561.8A patent/EP3513093B1/en active Active
- 2018-05-30 WO PCT/US2018/035016 patent/WO2019018068A1/en unknown
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WO2019018068A1 (en) | 2019-01-24 |
CN109891124A (zh) | 2019-06-14 |
US11287013B2 (en) | 2022-03-29 |
US20190346014A1 (en) | 2019-11-14 |
EP3513093B1 (en) | 2021-03-17 |
EP3513093A1 (en) | 2019-07-24 |
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