CN105408089A - 具有多个超声焊极的超声波焊接装置 - Google Patents

具有多个超声焊极的超声波焊接装置 Download PDF

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CN105408089A
CN105408089A CN201480022339.XA CN201480022339A CN105408089A CN 105408089 A CN105408089 A CN 105408089A CN 201480022339 A CN201480022339 A CN 201480022339A CN 105408089 A CN105408089 A CN 105408089A
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sonotrode
sonotrodes
processed
sealing surface
ultrasonic
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A·施奈德
G·格内德
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Herrmann Ultraschalltechnik GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/088—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using several cooperating sonotrodes, i.e. interacting with each other, e.g. for realising the same joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B29C66/53261—Enclosing tubular articles between substantially flat elements
    • B29C66/53262—Enclosing spouts between the walls of bags, e.g. of medical bags
    • B29C66/53263—Enclosing spouts between the walls of bags, e.g. of medical bags said spouts comprising wings, e.g. said spouts being of ship-like or canoe-like form to avoid leaks in the corners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81469—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed next to the other in a single line transverse to the feed direction, e.g. shoulder to shoulder sonotrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9512—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools by controlling their vibration frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9513—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration frequency values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/844—Applying rigid valves, spouts, or filling tubes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Earth Drilling (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

本发明涉及一种用于材料的超声波加工的超声波焊接装置，具有至少两个超声焊极和一个转换器装置，该转换器装置将交流电压转换成超声波振动并且使该至少两个超声焊极处于超声波振动状态，所述至少两个超声焊极被设置成使待加工材料在加工期间布置在它们之间并且能同时被该至少两个超声焊极加工。为了使得超声波焊接装置允许有效的材料加工且在两个超声焊极之间没有不期望的相互干扰发生，如本发明所述的转换器装置在频率fs1激发第一超声焊极并且在频率fs2激发第二超声焊极，fs2大于fs1。

Description

具有多个超声焊极的超声波焊接装置
本发明涉及一种用于材料的超声波加工且具有至少两个超声焊极的超声波焊接装置。
超声波是可听极限之上的机械振动。其频率范围从大约20KHz延伸到1GHz。这样的超声波频率通常由压电式声换能器(转换器)从电能产生。所述机械振动能量经由连接到转换器的超声焊极、可能地经由变幅器部分(也被成为增压器)施加到要加工的工件或材料上。
超声焊极的用于与待加工材料接触的表面也称为密封面。振动单元因此包括发生器、转换器、可选的变幅器部分和超声焊极。在多种使用情况中，变幅器和超声焊极为一整体。
为了借助于超声波振动单元有效地传输超声波振动，引起超声波振动单元的谐振是必要的。依赖于超声波振动单元的结构，其具有多个固有频率。仅当转换器产生超声波振动单元的固有频率时，超声波振动单元的谐振才发生。因此，转换器和超声波振动单元必须彼此调谐。
当使用超声波加工材料时，被加工的材料通常定位在超声焊极和也被称为砧板的对应工具(其不属于振动结构)之间。与待加工材料接触的超声焊极然后向待加工材料传输超声能量，该材料因此例如被焊接或切断。
在那种情况下，能量在密封面处传输到待加工材料。待加工材料由此也产生振动，以便在待加工材料接触对应工具的表面处也发生能量传递。
即使被加工材料包括多个元件，例如具有2层结构，通过由超声焊极传输到第一层的振动，能量传递也在第一层和第二层之间的限定区域中发生。然而，尤其是在较厚的材料的情况下，其不能由超声焊极引起振动或者仅导致不充分的振动，对应工具和待加工材料之间的能量传递通常不足以进行有效的焊接。
因此WO2010/145927已经提出使用两个同样的超声焊极来加工薄片材料。在该情况下，两个超声焊极被设置成使得待加工材料在加工操作期间被布置在它们之间，并且因此可以被两个超声焊极同时加工。
然而，根据已知的加工工艺，两个超声焊极被完全相同的超声频率激励，其导致一个超声焊极可能受到另一超声焊极的干扰影响并且反之亦然。
因此，以所描述的现有技术为基本出发点，本发明的目的是提供一种超声波焊接装置以允许有效的材料加工而且两个超声焊极之间不会有互相干扰。
根据本发明，为了实现上述目的，至少两个超声焊极被如此设置以使得第一超声焊极可以被固有频率fs1激发并且第二超声焊极可被固有频率fs2激发，其中fs2大于fs1。由此两个超声焊极应各自具有相应设计的转换器以提供各自的固有频率。也就是说，在操作中，一个超声焊极执行超声波振动fs1并且另一个超声焊极执行超声波振动fs2。
现在在材料加工期间，一个超声焊极的超声波振动通过材料传输到没有满足匹配的固有频率的另一超声焊极，以使得第一超声焊极实际上不影响第二超声焊极的振动行为。
期望超声焊极这样构建，即fs2不是fs1的整数倍。更具体地，如果第二超声焊极的固有频率是第一超声焊极的固有频率的整数倍，那么就会涉及较高阶谐波振动的激励并且在两个超声焊极之间产生不利影响。
实际上发现最好是并且优选
例如，第一超声焊极可以在30KHz的频率fs1被激发，而第二超声焊极可以在35KHz的频率fs2被激发。30KHz的振动充分远离第二超声焊极的35KHz的固有频率，以使得在第一超声焊极与第二超声焊极之间几乎没有能量传递。
通过不同的振动频率，超声波加工操作可以被显著的改进，因为现在超声焊极的振动幅度可以被设置成不对其它超声焊极的振动幅度产生影响。
在进一步的优选实施例中，所述至少两个超声焊极分别具有至少一个平坦的密封面部分。
在优选实施例中，超声焊极能在打开位置和关闭位置之间相对于彼此往复运动，其中在打开位置，两个密封面彼此远离地布置并且待加工材料可以被进一步运送，其中在关闭位置，两个密封面彼此靠近地布置并且待加工材料被加工。
在许多应用情形中，将例如倾倒装置(喷嘴)这样的物品焊接到薄片材料中是必要的。在该种情况下，密封表面可具有适当的开口。
尤其地，当将喷嘴焊接到例如饮料包装中时，至少一个超声焊极、优选两个超声焊极具有至少一个弯曲的密封面部分，优选凹形弯曲密封面部分。当加工材料时，要被焊接到正确位置的物品，例如喷嘴，随后装配入凹形弯曲密封面部分中。
在进一步优选的实施例中，至少一个超声焊极并且优选至少两个超声焊极具有两个平坦的密封面部分以及在这两个密封面部分之间的一弯曲密封面部分。
在进一步优选的实施例中，具有至少三个超声焊极，其中所述超声焊极被设置为使得待加工材料在加工操作期间被定位在至少一个超声焊极与至少两个超声焊极之间，其中优选位于待加工材料一侧的超声焊极的总表面面积大致等于位于待加工材料另一侧的超声焊极的总表面面积。
从这方面来说，期望定位在待加工材料相同侧的超声焊极具有相互分隔开的密封面。
同样有利的是，定位在待加工材料一侧的超声焊极的数量不同于定位在待加工材料另一侧的超声焊极的数量。
本发明更进一步的优点、特征和可能的应用从下面对优选实施例的描述以及所附的附图中可以更清楚地示出。
附图1示出了插入在两个薄片材料之间的喷嘴的透视图，
附图2示出了图1中结构的俯视图，
附图3示出了图1中结构的正视图，
附图4示出了根据本发明的一个实施例的透视图，
附图5示出了附图4的实施例的平面视图，以及
附图6示出了附图4的实施例的侧视图。
附图1至3概略示出了两个薄片材料2之间的喷嘴1。具体地，饮料以及洗衣剂通常在其中焊接有倾倒装置(即所谓的喷嘴)的塑料袋中被售卖。焊接操作可以由例如超声波焊接装置实现。
本发明的一个实施例如图4至6中所示。附图4示出了超声波焊接装置的透视图，附图5示出了前视图以及附图6示出了侧视图。
所述超声波焊接装置共具有三个超声焊极3、4、5。一个超声焊极3通过变幅器9连接到转换器6。所述转换器6将交流电压转换成机械超声波振动。为此目的通常具有压电晶体。
并非绝对必需的所述变幅器9转换超声波振动的振幅，但不是频率。因此可以利用通过转换器6的固有振动引起所述超声焊极3的振动。所述超声焊极3具有在超声波振动期间可减少超声焊极内的材料变形的两个狭缝11。
其它两个超声焊极4、5分别通过变幅器9、10连接到转换器7、8。两个超声焊极4、5中的每一个超声焊极能够通过转换器7、8之一执行超声波固有振动。所述两个超声焊极4、5具有由转换器7、8激发的固有频率，其不同于所述超声焊极3的固有频率。
所述两个超声焊极4、5通过保持器13、14连接到固定板12。所述超声焊极4、5因此是不可动的——除了振动之外。
相反地，所述超声焊极3可相对于超声焊极4、5在打开位置(未示出)和闭合位置或加工位置之间往复移动(如图4至6所示的)。超声焊极3以及超声焊极4、5均具有平坦的密封面部分和凹形弯曲的密封面部分。它们被这样设置，以使得在图4至6所示的加工位置，分别在超声焊极3和4之间以及3和5之间形成相应的通道15，其轮廓与喷嘴1的轮廓基本一致。
因此在打开位置，具有两个喷嘴的薄片材料可被装配于超声焊极4、5的凹形密封面部分，以使得薄片材料2在后续的加工位置能够被焊接到喷嘴1。
利用在不同振动频率下运行的两个超声焊极使得在薄片材料2和喷嘴1之间实现有效焊接成为可能。
附图标记列表
1喷嘴
2薄片材料
3，4，5超声焊极
6，7，8转换器
9，10变幅器
11狭缝
12固定板
13，14保持器
15通道

Claims (8)

1.一种用于材料的超声波加工的超声波焊接装置，其包括至少两个超声焊极以及转换器装置，所述转换器装置将交流电压转换为超声波振动并促使所述至少两个超声焊极执行超声波振动，其中所述至少两个超声焊极被设置成使得待加工材料在加工操作期间定位在所述至少两个超声焊极之间并且能够同时被所述至少两个超声焊极加工，其特征在于，所述转换器装置在频率fs1激发第一超声焊极并且在频率fs2激发第二超声焊极，其中fs2大于fs1。
2.如前述权利要求1所述的超声波焊接装置，其特征在于，fs2不是fs1的整数倍。
3.如前述权利要求1或2所述的超声波焊接装置，其特征在于， 并且优选
4.如前述权利要求1-3之一所述的超声波焊接装置，其特征在于，所述至少两个超声焊极分别具有至少一个平坦的密封面部分。
5.如前述权利要求1-4之一所述的超声波焊接装置，其特征在于，至少一个超声焊极，优选两个超声焊极具有至少一个弯曲密封面部分，优选凹形弯曲密封面部分。
6.如前述权利要求5所述的超声波焊接装置，其特征在于，至少一个超声焊极并且优选所述至少两个超声焊极具有两个平坦的密封面部分和布置在这两个密封面部分之间的弯曲密封面部分，优选凹形弯曲密封面部分。
7.如前述权利要求1-6之一所述的超声波焊接装置，其特征在于，所述超声波焊接装置具有至少三个超声焊极，其中所述超声焊极被设置成使得待加工材料在加工操作期间被定位在至少一个超声焊极与至少两个超声焊极之间，其中优选定位在待加工材料一侧的超声焊极的总表面面积大致等于定位在待加工材料另一侧的超声焊极的总表面面积。
8.如前述权利要求7所述的超声波焊接装置，其特征在于，定位在待加工材料同一侧的超声焊极具有相互分隔开的密封面。
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